Medical Radiography Quiz Questions

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1. A technique used to measure the operators exposure to radiation is 

Explanation

The correct answer is for the operator to wear a radiation film badge. This is because a radiation film badge is a device worn by operators to measure their exposure to radiation. It contains a film that darkens when exposed to radiation, allowing for the measurement of the amount of radiation the operator has been exposed to. This is a common and effective method used in industries where workers are at risk of radiation exposure, such as nuclear power plants or medical facilities.

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About This Quiz
Medical Radiography Quiz Questions - Quiz

Let's start this quiz it will give you the different functions of medical radiography. Find out now how much do you know about it!

2. To avoid exposure to secondary radiation, the operator should stand

Explanation

To avoid exposure to secondary radiation, the operator should stand at least 6 feet from the x-ray head. This distance ensures that the operator is outside the immediate vicinity of the primary beam, reducing the risk of direct exposure. Standing farther away from the x-ray head also minimizes the chances of exposure to scattered radiation, which can occur when the primary beam interacts with objects or surfaces in the surrounding area. By maintaining a safe distance, the operator can effectively protect themselves from unnecessary radiation exposure.

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3. The xray at the center of the xray beam is called the 

Explanation

The x-ray at the center of the x-ray beam is called the central ray. This term refers to the primary x-ray beam that passes through the patient's body and is used to create the diagnostic image. The central ray is typically aligned with the area of interest to ensure accurate imaging and minimize radiation exposure to surrounding tissues. It is an essential component in producing high-quality x-ray images.

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4. The difference in density in various regions of a radiograph is called

Explanation

Contrast refers to the difference in density between different regions of a radiograph. It is an important characteristic in radiology as it helps to distinguish between different structures and abnormalities. By adjusting the contrast, radiologists can enhance the visibility of certain structures and improve the diagnostic accuracy of the image. Collimation refers to the restriction of the x-ray beam, filtration refers to the removal of low-energy x-rays, and definition refers to the sharpness and clarity of the image.

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5. Blurred films can result from

Explanation

Blurred films can result from the movement of the patient during the x-ray procedure. When a patient moves, it causes the image to appear blurry because the x-ray machine captures the movement rather than a clear image of the body part being examined. This can happen if the patient is unable to stay still or if they are in pain or discomfort during the procedure. Patient movement is a common cause of blurred films and can affect the overall quality and accuracy of the x-ray image.

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6. The most sensitive cells to ionizing radiation are

Explanation

Reproductive cells, such as sperm and eggs, are the most sensitive to ionizing radiation because they undergo rapid division and have a high rate of cell turnover. Ionizing radiation can damage the DNA in these cells, leading to mutations and potentially causing infertility or genetic disorders in offspring. This sensitivity is due to the fact that reproductive cells are responsible for passing on genetic material to future generations, making them more vulnerable to the harmful effects of radiation.

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7. Scatter radiation is a type of 

Explanation

Scatter radiation refers to the radiation that is deflected or scattered in different directions after interacting with an object or surface. It is called secondary radiation because it is produced as a result of the interaction of primary radiation with matter. Primary radiation, on the other hand, refers to the initial radiation that is emitted directly from a source. Stray radiation refers to any radiation that is not part of the intended beam and can include scatter radiation. Filtered radiation refers to radiation that has been selectively attenuated or removed by a filter. Therefore, the correct answer is secondary radiation.

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8. The portion of the target that is struck by electrons is called the 

Explanation

The correct answer is focal spot. The focal spot refers to the specific area on the target that is struck by electrons in imaging systems such as X-ray machines. This spot is responsible for producing the X-ray photons that are used for imaging. The size and shape of the focal spot can affect the resolution and quality of the resulting image.

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9. Film fog can occur if there is 

Explanation

A light leak in the dark room can cause film fog. When there is a leak of light into the dark room, it can expose the film to unwanted light, leading to fogging. This can result in a loss of contrast and clarity in the developed film. It is important to have a light-tight dark room to prevent any light leaks and ensure proper film development.

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10. Collimation of the primary beam

Explanation

The correct answer is "restricts the size and shape of the x-ray beam." Collimation refers to the process of limiting the size and shape of the x-ray beam to the area of interest. By restricting the size and shape of the beam, unnecessary radiation exposure to the patient and surrounding areas is minimized. This helps to improve image quality by reducing scatter radiation and improving contrast. Additionally, collimation helps to ensure that only the desired anatomy is included in the final radiograph, making it easier for the radiologist to interpret the image.

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11. The cathode is a filament composed of

Explanation

The cathode is a filament composed of tungsten. Tungsten is commonly used as the filament material in incandescent light bulbs and electron tubes because it has a high melting point and is a good conductor of electricity. Its high melting point allows it to withstand the high temperatures generated when an electric current passes through it, while its conductivity allows it to efficiently emit electrons when heated, enabling the cathode to function properly.

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12. If a patient expresses concern about the hazard of radiation, the patient can be assured that

Explanation

The correct answer is that only those films necessary for proper diagnosis will be exposed. This assurance addresses the patient's concern about radiation hazards by indicating that the dentist will only take the minimum number of X-rays needed for an accurate diagnosis, minimizing the patient's exposure to radiation. This approach aligns with the principle of ALARA (As Low As Reasonably Achievable) in radiation safety, which aims to minimize radiation exposure while still obtaining necessary diagnostic information.

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13. The radiographic film is covered with an emulsion of 

Explanation

The radiographic film is covered with an emulsion of silver bromide crystals. This is because silver bromide is photosensitive and can be exposed to light to capture the image. When the film is exposed to X-rays, the silver bromide crystals react and create a latent image. This image can then be developed and fixed to produce a visible image on the film. Cellulose, silver acetate, and potassium bromide are not commonly used in radiographic films and do not have the same photosensitivity properties as silver bromide.

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14. The usual number of filmsin a complete dental radiographic survey is 

Explanation

A complete dental radiographic survey typically consists of taking X-rays of all the teeth in the mouth. This includes taking X-rays of both the upper and lower jaws, as well as different angles and positions of each tooth. The range of 18-20 films is considered the usual number for a complete survey, as it allows for adequate coverage of all the teeth and surrounding structures.

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15. Which of the follwoing is used to describe the blackness of an exposed radiograph?

Explanation

Density is used to describe the blackness of an exposed radiograph. In radiography, density refers to the degree of darkening or blackness in an image. It is determined by the amount of radiation that reaches the film or image receptor during exposure. A high density indicates a darker image, while a low density indicates a lighter image. The density of a radiograph is influenced by factors such as exposure settings, processing techniques, and the thickness and composition of the tissue being imaged.

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16. The first sign of xray dermatitus is 

Explanation

Erythema is the correct answer because it refers to redness or inflammation of the skin, which is one of the first signs of x-ray dermatitis. This condition occurs when the skin is exposed to high levels of radiation, leading to skin damage and various symptoms such as redness, swelling, and blistering. Alopecia, dry skin, and pain may also occur as the condition progresses, but erythema is typically the initial symptom.

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17. After each use the leaded apron must be 

Explanation

The leaded apron must be draped over a support rod unfolded after each use to ensure its proper storage. This allows the apron to be easily accessible for future use and prevents any creases or folds that could damage the protective lead lining. Additionally, draping the apron over a support rod helps to maintain its shape and prevent any unnecessary wear and tear. Storing the apron in a darkroom or discarding it for infection control purposes would not be appropriate or necessary.

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18. The amount of radiation a person recieves

Explanation

Radiation exposure is cumulative in the entire body, meaning that the effects of radiation build up over time and are not limited to just the skin. This means that even small doses of radiation can have harmful effects on the body if they accumulate over time. It is important to minimize radiation exposure to protect overall health and well-being.

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19. Xrays are mose effectively stopped by

Explanation

Lead is the correct answer because it is a dense material that effectively absorbs and blocks X-rays. Lead has a high atomic number, which means it has more electrons and a greater chance of interacting with X-ray photons, leading to their absorption. This property makes lead an ideal choice for shielding against X-rays in various applications such as medical imaging and radiation protection. Copper, glass, and tungsten are not as effective in stopping X-rays as lead.

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20. The operator must avoid  all of the following EXCEPT 

Explanation

The operator must avoid stray radiation, secondary radiation, and the primary beam to ensure safety and accuracy in their work. However, natural sunlight is not a concern in this context as it does not pose any direct risks or interference with the operator's tasks.

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21. The lead diaphragm determines the size and shape of the

Explanation

The lead diaphragm determines the size and shape of the x-ray beam. The diaphragm is used to limit the area that the x-ray beam covers, allowing for more precise targeting of the desired area. By adjusting the lead diaphragm, the size and shape of the x-ray beam can be controlled, which is important for obtaining clear and accurate x-ray images.

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22. The best type of xray to penetrate body tissue is 

Explanation

X-rays are a form of electromagnetic radiation that can penetrate body tissues. The best type of X-ray to penetrate body tissue is hard rays with short wavelengths. Hard rays have higher energy and shorter wavelengths, allowing them to pass through body tissues more easily. Soft rays with long wavelengths have lower energy and are less effective at penetrating body tissues. Therefore, hard rays with short wavelengths are the most suitable for imaging and diagnosing conditions within the body.

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23. If patient is reluctant to be radiographed, the auxillary should 

Explanation

When a patient is reluctant to be radiographed, the best course of action for the auxiliary is to explain the procedure thoroughly to the patient. By providing a clear and detailed explanation, the auxiliary can help alleviate any fears or concerns the patient may have, ultimately increasing their comfort and willingness to undergo the radiograph. This approach allows for better communication and patient education, ensuring that the patient understands the importance and benefits of the procedure. Referring the patient to a dental hygienist or rescheduling the appointment may not address the patient's reluctance, while referring them to an x-ray laboratory may not be necessary if the issue can be resolved through effective communication.

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24. The most effective way to reduce gonadel exposure from xrays is to 

Explanation

Using a leaded lap apron is the most effective way to reduce gonadal exposure from x-rays. Lead is a dense material that can effectively block radiation, and by wearing a leaded apron over the lap area, the gonads can be shielded from the harmful effects of radiation. This is particularly important in medical imaging procedures where the pelvis or abdomen is being imaged, as these areas contain the reproductive organs. Increasing kVps or vertical angulation, as well as using ultraspeed film, do not directly address the issue of gonadal exposure and are not as effective as using a leaded apron.

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25. The best technique for reducing the radiation exposure to both patient and operator is the use of 

Explanation

Using fast film is the best technique for reducing radiation exposure to both the patient and the operator. Fast film requires less exposure time to capture an image compared to slower films, which means less radiation is needed. This reduces the overall radiation dose received by the patient and also minimizes the amount of time the operator is exposed to radiation. Fast film is particularly beneficial in situations where quick image acquisition is necessary, such as in emergency cases or when dealing with restless or uncooperative patients.

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26. If the end of the xray cone approximates the tip of the patients nose, the operator is exposing a radiograph of the

Explanation

If the end of the x-ray cone approximates the tip of the patient's nose, it means that the x-ray is focused on the upper front teeth. The maxillary central incisors are the two front teeth in the upper jaw, so they would be the teeth exposed in the radiograph.

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27. The periapical film reveals

Explanation

The periapical film is a dental X-ray that provides a detailed image of a specific tooth and its surrounding structures. It captures the entire tooth, including the apex, which is the tip of the root. This allows dentists to assess the condition of the tooth, detect any abnormalities or pathology, and determine the need for treatment. The film does not show the entire jaw or both upper and lower teeth in the same image. It is specifically designed to focus on a single tooth and provide a close-up view.

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28. The detection of interproximal carries is best seen by a 

Explanation

The detection of interproximal caries is best seen by a bite-wing film. Bite-wing films are specifically designed to capture the areas between the teeth, making them ideal for detecting caries in these interproximal spaces. This type of film allows for a clear and detailed view of the tooth surfaces, enabling dentists to identify any signs of decay or cavities that may be present. The other options, such as occlusal film, panorex film, and lateral head plate, are not as effective in visualizing interproximal caries.

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29. Accumulated radiation dosage for those who work with radiation may not exceed

Explanation

The accumulated radiation dosage for those who work with radiation should not exceed 0.1 rem/week. This limit is set to ensure the safety of individuals who are exposed to radiation regularly. Higher levels of radiation can have harmful effects on the body, including an increased risk of cancer and other health problems. Therefore, it is important to adhere to the recommended limit of 0.1 rem/week to minimize the potential risks associated with radiation exposure.

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30. To increase the penetrating power of an xray beam, the auxiliary must

Explanation

Increasing the Kilovoltage Peak (KvP) in an x-ray beam increases the penetrating power of the beam. KvP determines the energy of the x-ray photons produced, and higher energy photons can penetrate through denser tissues more effectively. Therefore, increasing KvP allows the x-ray beam to pass through the patient's body more easily, resulting in better image quality and diagnostic accuracy.

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31. The basic principle of bisenting the angle technique is 

Explanation

The correct answer is "central ray must be directed at right angle to the imaginary line that bisects the angle formed by the long axis of the tooth and the plane of the film." This principle is important in bisecting angle technique because it ensures that the central ray is directed accurately to capture the image of the tooth on the film. By bisecting the angle formed by the long axis of the tooth and the plane of the film, the central ray is aligned properly to capture the tooth's image without distortion or overlapping. This technique helps in obtaining clear and accurate radiographic images for diagnosis and treatment planning.

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32. A material or substance that does stop or absorb xrays is known as 

Explanation

Radiopaque is the correct answer because it refers to a material or substance that does stop or absorb X-rays. When X-rays pass through the body, radiopaque substances appear white on the X-ray image, allowing for the visualization of structures such as bones or dental fillings. This property is useful in medical imaging as it helps in identifying abnormalities or fractures in bones and detecting dental issues. Radiographic, radiolucent, and radiodontic are incorrect options as they do not accurately describe the property of stopping or absorbing X-rays.

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33. Exposure of a radiograph on a child

Explanation

The exposure of a radiograph on a child requires less time than an adult because children have smaller body sizes and less dense tissues compared to adults. This means that less time is needed for the X-rays to penetrate through the child's body and create a clear image on the radiograph. Additionally, children are usually more cooperative and less likely to move during the procedure, further reducing the time needed for exposure.

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34. The raised button on the radiograph aids in 

Explanation

The raised button on the radiograph aids in mounting. This is because the raised button provides a point of reference for aligning the radiograph correctly in the mounting process. Mounting involves attaching the radiograph securely to a backing board or film mount to ensure it remains in place and can be easily viewed and interpreted. The raised button helps to ensure that the radiograph is positioned accurately and consistently during the mounting process.

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35. Two films are developed for the same length of time but at different temperatures.  The film developed at the higher temperature will be

Explanation

When film is developed at a higher temperature, it tends to develop faster and the image appears darker. This is because higher temperature increases the rate of chemical reactions, causing the silver halide crystals in the film to be more fully exposed and developed. As a result, the film developed at the higher temperature will have a darker appearance compared to the film developed at a lower temperature.

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36. In the paralleling technique, a device used to hold the film in the patients mouth is

Explanation

The correct answer is a film holder. In the paralleling technique, a film holder is used to hold the dental film in the patient's mouth. This device ensures that the film remains stable and in the correct position during the dental X-ray procedure. It helps to achieve accurate and clear images by minimizing movement and ensuring proper alignment of the film with the X-ray beam. A film holder is specifically designed for this purpose and is commonly used in dental radiography.

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37. The quality, or penetrating power, of secondary radiation is 

Explanation

Secondary radiation refers to the radiation that is produced as a result of the interaction between primary radiation and matter. It can be in the form of scattered or secondary X-rays, or other types of radiation. The penetrating power of radiation refers to its ability to pass through matter. Primary radiation, which is the initial radiation emitted from a source, generally has higher energy and therefore greater penetrating power compared to secondary radiation. Therefore, the correct answer is that the quality or penetrating power of secondary radiation is less than that of primary radiation.

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38. Cephalometric radiographs are used in which area of dentistry

Explanation

Cephalometric radiographs are used in orthodontics. These radiographs provide a detailed view of the patient's head and skull, allowing orthodontists to analyze the relationship between the teeth, jaws, and facial structures. This information is essential for planning and monitoring orthodontic treatment, including the alignment and positioning of teeth, the correction of bite abnormalities, and the evaluation of growth and development. Cephalometric radiographs are an important tool in orthodontics for diagnosing and creating treatment plans for patients.

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39. Extraoral films are placed in rigid frames called

Explanation

Extraoral films are larger-sized dental X-ray films that are used to capture images of the entire skull or jaw. These films need to be held in place securely during the X-ray procedure to ensure accurate and clear images. Cassettes are rigid frames that are specifically designed to hold extraoral films in place. They provide stability and prevent any movement or distortion of the film during exposure, resulting in high-quality diagnostic images. Therefore, cassettes are the correct answer for this question.

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40. Black lines across the film may be the result of 

Explanation

Excessive bending can cause black lines across the film because it puts pressure on the film and can cause damage or distortion to the image. When the film is bent too much, it can result in the emulsion layer cracking or separating, leading to black lines appearing on the film. This can happen if the film is mishandled or if it is stored or transported in a way that causes it to bend excessively.

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41. When exposing the patient to only one periapical radiograph, the auxillary

Explanation

The correct answer is "must enter this procedure in the dental chart." When exposing the patient to a periapical radiograph, it is important for the auxiliary to document this procedure in the dental chart. This helps in maintaining accurate and complete patient records, allowing for proper diagnosis and treatment planning. It also serves as a reference for future dental visits and ensures continuity of care.

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42. Proper collimation for the film size and target-film distance will 

Explanation

Proper collimation for the film size and target-film distance will decrease the radiation received by the patient. Collimation refers to the process of restricting the size of the X-ray beam to the area of interest. By properly collimating the X-ray beam, unnecessary radiation exposure to the patient's body can be minimized. This helps to ensure that only the necessary area is exposed to radiation, reducing the overall radiation dose received by the patient.

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43. The developing solution

Explanation

The correct answer is "should always be covered." This is because when developing a solution, it is important to prevent any contamination or exposure to external elements that could alter or damage the solution. By keeping the solution covered at all times, it ensures that it remains pure and unaffected, allowing for accurate and reliable results during the development process.

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44. The best way to dry processed film manually is to

Explanation

Hanging film racks in the dark room is the best way to dry processed film manually because it allows the films to dry evenly and prevents them from sticking together. Placing films on a flat counter top with towels or using an air syringe from the dental unit may not provide proper air circulation for drying, and hanging the films over the heat sterilizer can cause damage to the film. Hanging the film racks in the dark room ensures that the films are protected from light and allows for proper drying without any risk of contact between wet films.

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45. The optimum time-temperature relationship for processing dental radiographs is

Explanation

The optimum time-temperature relationship for processing dental radiographs is 68 degrees F for 4 1/2 minutes. This temperature and duration provide the ideal conditions for developing the radiographs without over or under-processing them. It ensures that the images are properly developed, allowing for accurate diagnosis and treatment planning in dentistry.

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46. The time period between the effects of cumulative radiation and visible tissue damage is the 

Explanation

The latent period refers to the time period between the effects of cumulative radiation and visible tissue damage. During this period, there may not be any immediate symptoms or visible signs of damage. It is called the latent period because the effects of radiation exposure are not immediately apparent and may take some time to manifest. This period can vary depending on the dose of radiation received and the specific tissues or organs affected.

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47. The temperature of the radiographic processing solutions is adjusted by

Explanation

The temperature of the radiographic processing solutions is adjusted by a temperature-adjustable waterbath. This is because a waterbath provides a controlled and consistent temperature environment for the solutions. By adjusting the temperature of the water in the waterbath, the temperature of the solutions can be easily regulated. This ensures that the solutions are maintained at the optimal temperature for efficient processing of radiographic films.

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48. A panorex film that exhibits distortion in the region and is lighter on one side of the film indicates

Explanation

The correct answer is that the patient's chin was not positioned properly. This is because a panorex film that exhibits distortion in the region and is lighter on one side of the film is typically caused by improper positioning of the patient's chin. When the chin is not positioned correctly, it can affect the alignment of the X-ray beam, leading to distortion and uneven exposure on the film.

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49. Which of these is not a factor when considering what size film to use?

Explanation

When considering what size film to use, factors such as the patient's age, the size of their mouth opening, and the shape of their dental arches are important considerations. However, the patient's previous radiation exposure is not a factor that influences the choice of film size. This is because the previous radiation exposure does not directly affect the size of the film needed for dental imaging.

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50. If the mA is increased while the kVp adnd exposure time are kept constant, the resulting films will

Explanation

If the mA (milliamperage) is increased while the kVp (kilovoltage peak) and exposure time are kept constant, the resulting films will be darker. This is because increasing the mA increases the amount of radiation used to expose the film, resulting in a higher density of the image on the film. A higher density leads to a darker appearance on the film. Therefore, increasing the mA while keeping the kVp and exposure time constant will result in darker films.

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51. Which extraoral film is used to visualize the sinus?

Explanation

The Waters film is used to visualize the sinus. The Waters view is an extraoral radiographic technique that provides a lateral view of the maxillary sinuses. It is commonly used in dentistry to assess the sinuses for signs of infection, inflammation, or other abnormalities. This technique involves placing the film under the patient's nose and angling the X-ray beam towards the forehead. This allows for a clear visualization of the maxillary sinuses and helps in diagnosing sinus-related issues.

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52. All of the tissues listed are radiopaque EXCEPT

Explanation

The pulp chamber is the correct answer because it is not radiopaque. Radiopacity refers to the ability of a substance to block or absorb X-rays, making it appear white on a radiograph. Enamel, cortical plate, and alveolar bone are all radiopaque tissues, meaning they appear white on X-rays. However, the pulp chamber, which contains soft tissues like nerves and blood vessels, is not radiopaque and appears darker on X-rays.

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53. X-ray films should be kept by the dentist along with other records for

Explanation

X-ray films should be kept by the dentist indefinitely because they serve as important records for a patient's dental history. These films provide valuable information about the patient's oral health, previous treatments, and any potential issues that may arise in the future. By keeping the X-ray films indefinitely, the dentist can refer back to them as needed for accurate diagnosis, treatment planning, and monitoring the progress of the patient's dental health over time. Additionally, retaining these records can also help in legal and insurance matters if any disputes or claims arise in the future.

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54. Film speed is determined by the 

Explanation

The size of the silver bromide crystal determines the film speed. Smaller crystals allow less light to be captured, resulting in a slower film speed, while larger crystals allow more light to be captured, resulting in a faster film speed.

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55. Filtration of the xray beam protects the patient by 

Explanation

Filtration of the x-ray beam protects the patient by eliminating weak wavelength xrays from the x-ray beam. Weak wavelength xrays have lower energy and are less penetrating, which means they are more likely to be absorbed by the patient's body tissues. By eliminating these weak xrays, the filtration reduces the dose of radiation received by the patient, minimizing the potential harm and increasing the safety of the procedure.

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56. The side of the nose is called the

Explanation

The side of the nose is called the "ala". The ala refers to the outer, fleshy part of the nostril that helps to shape and support the nose. It is also involved in the regulation of airflow during breathing.

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57. The fixing solution is 

Explanation

The fixing solution is acidic because it is used in photography to remove the unexposed silver halide from the photographic film or paper. Acidic solutions help to dissolve and remove the unexposed silver halide particles effectively.

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58. Intensifying screens

Explanation

Intensifying screens are used in extraoral films to decrease the exposure time required for capturing the image. These screens contain phosphor crystals that emit light when exposed to x-rays, which in turn reduces the amount of radiation needed to create the image. The emitted light intensifies the exposure on the film, allowing for shorter exposure times and reducing the patient's radiation exposure. Therefore, the use of intensifying screens helps to decrease the exposure time required for extraoral films.

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59. For maximum penetration of xrays, which of the following combinations would you select?

Explanation

To achieve maximum penetration of X-rays, a high kilovoltage peak (kVp) and low milliamperes (mA) are required. The higher the kVp, the greater the energy of the X-rays, allowing them to penetrate deeper into the body. On the other hand, the mA determines the quantity of X-rays produced. Therefore, selecting 90 kVp and 10 mA would provide the best combination for maximum penetration of X-rays.

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60. The housing of the xray tube is

Explanation

The housing of the x-ray tube is made of glass because glass is a good insulator and can withstand the high temperatures generated during x-ray production. It also allows for the passage of x-rays while protecting the surrounding environment from radiation. Additionally, glass is transparent, allowing technicians to visually inspect the tube for any damage or malfunction.

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61. Reticulation is

Explanation

Reticulation refers to the cracking of the film emulsion. This occurs when there is a sudden and extreme change in temperature during the developing process. The emulsion, which is the light-sensitive layer on the film, contracts and expands too quickly, leading to cracks or wrinkles on the surface. This can result in a loss of image quality and detail. It is important to maintain proper temperature control during film development to prevent reticulation.

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62. The chemicals used in processing solutions are dissolved in 

Explanation

The chemicals used in processing solutions need to be dissolved in a liquid in order to create a solution. Distilled water is a common choice for this purpose because it is pure and free from impurities that could interfere with the chemical reactions. It is also a neutral solvent, meaning it does not react with most chemicals. Therefore, using distilled water ensures that the chemicals can dissolve properly and react as intended in the processing solution.

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63. Which of these appears radiolucent?

Explanation

Caries refers to tooth decay or cavities, which are areas of the tooth that have been damaged and demineralized by acid-producing bacteria. In radiographs, caries appear radiolucent because they allow more X-rays to pass through, resulting in a darker or less dense appearance compared to the surrounding healthy tooth structure. This is because the decayed area lacks the mineral content that would otherwise block or attenuate the X-rays. Therefore, caries are the correct answer as they appear radiolucent on dental radiographs.

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64. What is the long, narrow, and radiolucent area visible below the roots of the mandibular molars called?

Explanation

The long, narrow, and radiolucent area visible below the roots of the mandibular molars is called the mandibular canal. This canal contains the inferior alveolar nerve and blood vessels that supply sensation and blood flow to the lower teeth and surrounding structures. It is an important anatomical landmark in dentistry and is often visible on dental radiographs.

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65. Maximum protection of the patient requires that the xray beam pass through a

Explanation

The correct answer is a shielded open-ended cone because it provides maximum protection for the patient. By using a shielded cone, the x-ray beam is directed only towards the specific area of interest, minimizing unnecessary exposure to other parts of the body. The open-ended design allows for better visualization and positioning of the cone, ensuring accurate and precise imaging. The shielding material further reduces scatter radiation, protecting both the patient and the operator. Therefore, a shielded open-ended cone is the most effective option for maximizing patient safety during x-ray procedures.

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66. If a film is exposed on the wrong side, the result will be 

Explanation

If a film is exposed on the wrong side, it will result in a herringbone pattern. This pattern occurs when the light passes through the film emulsion in a way that creates a distinctive diagonal pattern resembling the bones of a herring. This happens because the light-sensitive emulsion on the wrong side of the film is not properly exposed, leading to this unique pattern rather than a clear image or no effect at all.

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67. A material or substance that does not stop or absorb xrays is known as 

Explanation

A material or substance that does not stop or absorb X-rays is known as radiolucent. This means that X-rays can pass through it easily, allowing for clear imaging of structures or objects behind the radiolucent material. Radiolucent materials are commonly used in medical imaging, such as X-rays or CT scans, to help visualize bones, organs, or other structures within the body.

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68. A dental assistant may expose radiographs

Explanation

A dental assistant may expose radiographs if it is permissible in the state he or she is employed. Different states have different regulations regarding the tasks that dental assistants are allowed to perform, including exposing radiographs. Therefore, it is important for dental assistants to be aware of and follow the regulations of the state they are employed in.

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69. Vertical angulation in the bisecting technique for the same radiograph can differ in patients because of 

Explanation

Vertical angulation in the bisecting technique for the same radiograph can differ in patients due to anatomic differences. Anatomic differences such as variations in the shape and position of the teeth, the height of the alveolar bone, and the position of the maxillary sinus can affect the vertical angulation required to obtain a proper image. Each patient may have unique anatomical features that need to be considered when positioning the X-ray tube and film to achieve accurate diagnostic images.

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70. If a radiograph remains in the developing solution too long, the film will be

Explanation

If a radiograph remains in the developing solution too long, the film will become darker. This is because the developing solution contains chemicals that react with the exposed silver halide crystals on the film, causing them to darken. If the film is left in the solution for an extended period of time, more of these crystals will be developed, resulting in a darker image. The film becoming lighter only if the temperature is increased is incorrect, as the temperature does not affect the development process in this scenario. The film being unaffected because time is not a factor is also incorrect, as the longer the film remains in the solution, the darker it will become.

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71. Foreshortening is caused by

Explanation

Foreshortening is caused by too much vertical angulation. When the X-ray beam is directed at too steep of an angle, the image of the object being X-rayed appears shorter and distorted. This occurs because the X-ray beam is not perpendicular to the object, causing a foreshortened image. Adjusting the vertical angulation to the correct angle helps to produce a more accurate and undistorted image.

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72. Xrays are made up of

Explanation

X-rays are a form of electromagnetic radiation, which consists of particles called photons. Photons have no mass or charge, and they travel at the speed of light. When high-energy electrons collide with a metal target, they release photons with a very short wavelength, which are known as X-rays. Therefore, the correct answer is photons.

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73. Fixing the film

Explanation

Fixing the film refers to the process of removing the unaffected silver salts from the film. This is done to prevent further development of the image and to stabilize the film. By removing the unaffected silver salts, the film is left with only the developed silver image, resulting in a clear and finalized photograph.

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74. The size of the collimated beam for intraoral radiology measured at the patients skin is

Explanation

The correct answer is 2.75 - 3.0 inches. This range represents the size of the collimated beam for intraoral radiology when measured at the patient's skin. It indicates the diameter of the beam that is used to capture the radiographic image inside the patient's mouth. This specific range is commonly used in dental radiography to ensure that the entire area of interest is captured while minimizing unnecessary radiation exposure to surrounding tissues.

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75. The occlusal plane of the maxillary arch being radiographed should be 

Explanation

The occlusal plane of the maxillary arch should be parallel to the floor when being radiographed. This ensures that the image accurately represents the relationship between the upper teeth and the floor. If the occlusal plane is not parallel to the floor, it can distort the image and make it difficult to interpret. Therefore, it is important to position the patient's head and the radiographic equipment in a way that aligns the occlusal plane parallel to the floor for optimal results.

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76. Appropriate infection control procedures during xray exposure should include 

Explanation

Placing a disposable plastic bag over the x-ray tubehead is an appropriate infection control procedure during x-ray exposure. This helps to prevent cross-contamination by creating a barrier between the x-ray tubehead and the patient's mouth or other body parts. The plastic bag can be easily disposed of after each use, ensuring a clean and sterile environment for each patient.

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77. The thermometer used to measure the temperature of the processing solutions is located 

Explanation

The thermometer used to measure the temperature of the processing solutions is located in the developer because the developer is a crucial part of the processing solutions. It is responsible for developing the film and requires a specific temperature range for optimal results. Therefore, it is important to monitor the temperature in the developer to ensure that it is within the desired range for proper film development.

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78. Cone cutting results from

Explanation

Cone cutting occurs when the x-ray beam is not properly aligned with the center of the film. This misalignment can happen due to various reasons such as incorrect horizontal angulation, insufficient vertical angulation, or being eliminated from a closed plastic cone. When the x-ray beam is not aimed at the center of the film, it results in a portion of the image being cut off, leading to cone cutting.

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79. Which characteristics of xrays make them both beneficial and hazardous?

Explanation

X-rays are both beneficial and hazardous due to their ability to destroy tissue. On one hand, this characteristic allows them to be used in medical imaging to detect and diagnose various conditions. On the other hand, excessive exposure to x-rays can be harmful as they can damage and destroy healthy tissues, leading to potential health risks such as radiation burns, genetic mutations, and an increased risk of developing cancer. Therefore, while x-rays have significant medical benefits, their destructive nature necessitates careful and controlled usage to minimize potential harm.

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80. How often should the processing solutions be changed?

Explanation

The processing solutions should be changed every 3-4 weeks. This is because processing solutions can become contaminated over time, leading to reduced effectiveness and potential damage to the equipment. Changing the solutions regularly ensures optimal performance and maintains the quality of the processed materials.

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81. Periapical firlms should extend beyond the occlusal plane 

Explanation

Periapical films should extend beyond the occlusal plane by 1/8 inch. This is important because it allows for proper visualization of the apical portion of the tooth and surrounding structures. Extending the film beyond the occlusal plane ensures that the entire tooth and its root structure are captured in the radiograph, providing a comprehensive view for diagnosis and treatment planning.

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82. Interproximal film may show all of the following except

Explanation

Interproximal films are dental X-rays that capture the areas between the teeth. These films are commonly used to detect dental issues such as incipient caries (early stage cavities), crest of alveolar bone (the bone that holds the teeth in place), and recurrent decay under existing restorations (decay beneath dental fillings or crowns). However, they are not typically used to identify root tip fractures, as these fractures are better visualized using periapical or panoramic X-rays. Therefore, root tip fractures would be the exception in this case.

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83. What term describes the U-shaped radiopaque structure often seen in maxillary molar films?

Explanation

The U-shaped radiopaque structure often seen in maxillary molar films is called the zygoma.

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84. What is the thin radiopaque band between the maxillary incisors called?

Explanation

The thin radiopaque band between the maxillary incisors is called the nasal septum. It is a structure made up of cartilage and bone that separates the left and right nasal cavities. The nasal septum helps to support the nose and maintain its shape.

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85. During processing, when can radiographs safely be exposed to light?

Explanation

After the final wash, radiographs can safely be exposed to light. This is because the final wash removes any remaining chemicals or residues from the development and fixing process, ensuring that the radiographs are fully processed and ready for exposure to light without any adverse effects.

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86. As the target-film distance is increased, the

Explanation

As the target-film distance is increased, there is less distortion in the resulting image. This is because increasing the distance between the target and the film reduces the effect of perspective distortion, which is the distortion that occurs when objects closer to the camera appear larger than objects farther away. By increasing the distance, the perspective distortion is minimized, resulting in a more accurate representation of the object's proportions and shapes on the film.

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87. Which of these structures is radiopaque?

Explanation

The lamina dura is radiopaque because it appears as a dense white line on a dental radiograph. It is the thin, compact bone that lines the tooth socket and surrounds the roots of the teeth. The radiopacity of the lamina dura is due to its high mineral content, which makes it more resistant to X-ray penetration compared to other structures in the mouth. This radiopacity allows dentists to assess the health of the surrounding bone and detect any abnormalities or pathology.

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88. Films not fixed for a long enough period of time will appear

Explanation

When films are not fixed for a long enough period of time, they can develop a brown tint. This is because the fixing process in film development is crucial for removing any unexposed silver halide crystals from the film. If the film is not fixed properly or for a sufficient amount of time, these residual silver halide crystals can react with air and light, causing a brown discoloration. Therefore, films that are inadequately fixed will appear to have a brown tint.

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89. A latent image is 

Explanation

A latent image refers to an image that is not immediately visible but is formed on a photographic film or paper when exposed to light. This image is created by energized silver halide crystals present in the film. These crystals are sensitive to light and get excited when exposed to it, forming a latent image that can be developed into a visible image through the process of chemical development.

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90. Extraoral films are

Explanation

Extraoral films are more sensitive to light than intraoral films because they are designed to be exposed outside of the mouth, where the light source is typically further away. Intraoral films, on the other hand, are designed to be placed inside the mouth and are therefore exposed to less intense light. This increased sensitivity to light in extraoral films allows for shorter exposure times and reduces the risk of overexposure.

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91. If a properly processed film is left overnight  in the water it will be

Explanation

If a properly processed film is left overnight in the water, it will be unchanged. This means that the film will not undergo any visible changes or damage when left in water for an extended period. The film's images will remain intact, and there will be no fading or discoloration.

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92. After the films are removed from from the fixer, they are washed for

Explanation

The correct answer is 20-30 min. After the films are removed from the fixer, they need to be washed to remove any remaining chemicals. This washing process typically takes 20-30 minutes. This duration ensures that all the fixer solution is thoroughly rinsed off the films, leaving them clean and ready for further processing or drying. Washing for a shorter duration may not effectively remove all the fixer, while washing for a longer duration may not provide any additional benefits and may unnecessarily prolong the process.

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93. The basic principle of the paralleling technique are all of the following EXCEPT 

Explanation

The correct answer is "8-inch short cone must be used". The principle of paralleling technique in dental radiography involves positioning the film parallel to the long axis of the tooth, directing the x-ray source perpendicular to the tooth and film, and using a 16-inch extension or long cone. The use of an 8-inch short cone is not a part of the paralleling technique.

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94. What is the radiopaque circular area below the apices of the mandibular incisors called?

Explanation

The radiopaque circular area below the apices of the mandibular incisors is called genial tubercles. Genial tubercles are small bony projections located on the lingual surface of the mandible. They serve as attachment points for various muscles and ligaments in the mouth. These tubercles can be seen on dental radiographs as small, round radiopaque areas below the roots of the mandibular incisors. They are a normal anatomical feature and are not indicative of any pathology or disease.

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95. A processed film reveals small white spots, indicating incomplete development.  The error on the film during processing was caused by

Explanation

The correct answer is films coming in contact with fixing solution before the proper processing procedure. This is because the small white spots on the processed film indicate incomplete development, which can occur if the film comes in contact with the fixing solution before it has been properly processed. Fixing is the final step in film development, where the unexposed silver halide crystals are removed from the film. If the film is prematurely exposed to the fixing solution, it can result in incomplete fixing and the appearance of white spots on the film.

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96. What is the small circular radiolucency near the roots of the mandibular premolars called?

Explanation

The small circular radiolucency near the roots of the mandibular premolars is called the mental foramen.

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97. If an unexposed film is processed, it will appear 

Explanation

If an unexposed film is processed, it will appear clear because there was no exposure to light, resulting in no image being formed on the film. Without any image, the film remains transparent and clear.

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98. A logical sequence for a full mouth survey of a patient with a complete dentition is 

Explanation

The logical sequence for a full mouth survey of a patient with a complete dentition is to first examine the upper arch, then the lower arch, and finally take bitewing X-rays. This sequence allows for a systematic approach, starting from the top and moving down, ensuring that all areas of the mouth are thoroughly evaluated. The bitewing X-rays are typically taken last as they provide a detailed view of the interproximal areas between the teeth, which can be better assessed once the overall condition of the arches has been determined.

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99. What term describes the heavily radiopaque midpoint of the mandible?

Explanation

The term "symphysis" refers to the heavily radiopaque midpoint of the mandible. The mandibular symphysis is the area where the two halves of the mandible fuse together during development. It is a prominent landmark in the lower jaw and can be easily identified on radiographs due to its high radiopacity. The other options, zygoma, odontoma, and hamulus, do not describe the heavily radiopaque midpoint of the mandible.

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100. What is the small circular radiolucency below the mandibular incisor roots called?

Explanation

The small circular radiolucency below the mandibular incisor roots is called the lingual foramen. This is a normal anatomical structure located on the lingual (tongue) side of the mandible. It is a small opening that allows for the passage of blood vessels and nerves to supply the lingual tissues of the mandible.

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101. For the developing solutions to work, the solution must be

Explanation

In order for the developing solutions to work effectively, they must be basic. This is because basic solutions have a higher concentration of hydroxide ions, which helps in the development process. Basic solutions are also able to react with certain compounds and promote the desired chemical reactions. Therefore, a basic solution is necessary for the successful development of solutions.

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102. The strength of the safelight permitted in the dark room depends on the 

Explanation

The strength of the safelight permitted in the dark room depends on the secured lighting in the room. This means that the level of light in the room should be controlled and secure to prevent any unwanted exposure to the film. If the lighting is too strong, it can cause fogging or overexposure of the film, affecting the quality of the radiograph. Therefore, it is important to have a properly secured lighting system in the dark room to ensure accurate and clear radiographic images.

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103. Elongation is caused by

Explanation

Insufficient vertical angulation refers to the incorrect positioning of the x-ray tube head in relation to the patient's anatomy. This results in the image being elongated vertically. If the vertical angulation is insufficient, the x-ray beam will be directed at a more horizontal angle, causing the image to appear stretched or elongated. This is why insufficient vertical angulation is the correct answer for the cause of elongation in radiographic images.

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104. After a film is exposed, the target-film distance is doubled.  The exposure time necessary to obtain a second film of equal density to the first film is 

Explanation

When the target-film distance is doubled, the intensity of the light reaching the film decreases by a factor of four (inverse square law). To compensate for this decrease in intensity, the exposure time needs to be increased by a factor of four. Therefore, the exposure time necessary to obtain a second film of equal density to the first film is fourfold.

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105. The dental auxillary is asked to change the 8-inch shortcone to the 16-inch long cone.  At twice the distance, in intensity of the xrays is now only

Explanation

When the distance from the source of x-rays is doubled, the intensity of the x-rays decreases by a factor of 1/4. This is because the intensity of x-rays is inversely proportional to the square of the distance from the source. So, if the distance is doubled, the intensity will be 1/4 as great.

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106. When taking a full mouth series of intraoral xrays the sagittal plane of the patients head should be

Explanation

When taking a full mouth series of intraoral xrays, the sagittal plane of the patient's head should be perpendicular to the floor. This means that the patient's head should be positioned at a 90-degree angle to the floor, with the top of the head facing straight up and the chin pointing straight down. This positioning ensures that the x-rays capture the teeth and surrounding structures from a consistent and accurate perspective, allowing for proper diagnosis and treatment planning.

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107. The best sequence for exposing maxillary radiographs is 

Explanation

The best sequence for exposing maxillary radiographs is to start with the central incisors, followed by the right cuspid, and then the left cuspid. This sequence allows for a systematic approach, starting from the midline and moving towards the posterior teeth. By starting with the central incisors, the clinician can ensure that the most important and visually prominent teeth are captured first. Then, moving to the right cuspid and left cuspid allows for a balanced and symmetrical view of the maxillary arch.

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108. Firm placement of the film will help prevent

Explanation

Firm placement of the film will help prevent gagging. This means that when the film is securely positioned in the mouth, it reduces the likelihood of the patient experiencing a gag reflex. Gagging can be uncomfortable and can interfere with the dental procedure, so ensuring that the film is properly placed can help alleviate this issue for the patient.

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109. Milliamperage controls

Explanation

The milliamperage controls the heating of the cathode. When the milliamperage is increased, more electrons are emitted from the cathode, resulting in increased heating of the cathode. This heating is necessary for the cathode to emit electrons and initiate the flow of current in the X-ray tube.

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110. The purpose of the lead foil in dental film is to 

Explanation

The lead foil in dental film is used to reduce film fogging. Film fogging occurs when stray radiation reaches the film and causes a hazy appearance. The lead foil acts as a barrier, preventing the stray radiation from reaching the film and thus reducing fogging. This ensures that the images produced on the dental film are clear and accurate for diagnosis and treatment planning.

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111. Film is washed after removing it from the developing solution to

Explanation

Film is washed after removing it from the developing solution to stop the developing process. The developing solution contains chemicals that cause the image on the film to appear. By washing the film, any remaining developing solution is removed, preventing further chemical reactions and ensuring that the image does not continue to develop or become overexposed. This step is crucial in the film development process to ensure that the desired level of development is achieved and to prevent any unwanted changes to the image.

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112. Films left overnight in the fixer

Explanation

If films are left overnight in the fixer, they will be clear. The fixer is a chemical solution used in the development process of film photography. It is responsible for removing the unexposed silver halide crystals from the film, leaving only the developed image. If the films are left in the fixer for the recommended amount of time, they will be properly developed and clear.

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113. Which of these appears radiolucent?

Explanation

A granuloma appears radiolucent because it is a mass of immune cells that forms in response to chronic inflammation. Radiolucent means that it allows X-rays to pass through easily, resulting in a darker appearance on an X-ray image. In contrast, a calculus, pulp stone, and cementoma are all radiopaque, meaning they appear lighter on an X-ray image because they block the passage of X-rays.

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114. The ala-tragus line is parallel to the floor when taking

Explanation

The ala-tragus line is an imaginary line that connects the ala of the nose to the tragus of the ear. It is used as a reference line in radiography to ensure proper positioning of the patient's head. When taking extraoral films, such as panoramic or cephalometric radiographs, the ala-tragus line should be parallel to the floor. This helps to ensure that the images are properly aligned and that anatomical structures are accurately represented. However, when taking mandibular occlusal films or maxillary and mandibular periapical films, the ala-tragus line is not relevant as these films are typically taken intraorally.

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115. What is the name of the diagonal radiopaque line visible at the lower part of the roots of the mandibular molars?

Explanation

The correct answer is internal oblique ridge. The internal oblique ridge is a radiopaque line that is visible on a dental radiograph at the lower part of the roots of the mandibular molars. It runs diagonally from the distal aspect of the mandibular first molar to the mesial aspect of the mandibular third molar. This ridge serves as an attachment site for the mylohyoid muscle and can help in identifying the location and orientation of the mandibular molars on a radiograph.

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116. A patient with an extemely narrow maxillary arch presents placement problems in xraying the premolar areas.  in the bisecting technique, which of the following placements would help solve this problem

Explanation

The correct answer is to use the paralleling technique for this film. This technique involves placing the film parallel to the long axis of the tooth and using a beam alignment device to ensure accurate positioning. By using this technique, the narrow maxillary arch can be accommodated, allowing for better visualization of the premolar areas in the x-ray.

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117. To visualize the two roots on the maxillary premolar, the central ray should be directed 

Explanation

To visualize the two roots on the maxillary premolar, the central ray should be directed slightly from the mesial or distal surfaces. This is because the roots of the maxillary premolar are positioned diagonally, with one root closer to the mesial surface and the other closer to the distal surface. By angling the central ray slightly from the mesial or distal surfaces, it allows for better visualization of both roots on the radiograph.

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118. The dentists new xray machine has inherent filtration of 2 mm of aluminum.  The dentist is operating the xray machine above 70 kvp for diagnostic film.  Which of the following amounts of added filtration will be necessary to meet the minimum filtration required?

Explanation

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119. What is the large radiolucent area shown on maxillary molar radiographs called?

Explanation

The large radiolucent area shown on maxillary molar radiographs is called the maxillary tuberosity.

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120. Radiographs of edentulous portions of a patients mouth

Explanation

Radiographs of edentulous portions of a patient's mouth should be exposed only on request of the patient. This is because edentulous areas refer to areas where teeth are missing, and taking radiographs in these areas may not provide any significant diagnostic information unless there is a specific concern or request from the patient. Routine exposure of radiographs in such cases may not be necessary and could expose the patient to unnecessary radiation. Therefore, it is best to take radiographs of edentulous areas only when requested by the patient.

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121. The principle used in panoramic radiography is

Explanation

Panoramic radiography uses a technique called horizontal curvature. This technique involves the use of a curved dental X-ray machine that rotates around the patient's head, capturing a full panoramic image of the teeth and surrounding structures. The curved shape of the machine allows for a more accurate and comprehensive image, as it follows the natural curvature of the dental arch. This technique is commonly used in dentistry to assess the overall oral health and detect any abnormalities or issues in the teeth and jawbone.

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A technique used to measure the operators exposure to radiation...
To avoid exposure to secondary radiation, the operator should stand
The xray at the center of the xray beam is called the 
The difference in density in various regions of a radiograph is called
Blurred films can result from
The most sensitive cells to ionizing radiation are
Scatter radiation is a type of 
The portion of the target that is struck by electrons is called...
Film fog can occur if there is 
Collimation of the primary beam
The cathode is a filament composed of
If a patient expresses concern about the hazard of radiation, the...
The radiographic film is covered with an emulsion of 
The usual number of filmsin a complete dental radiographic survey...
Which of the follwoing is used to describe the blackness of an exposed...
The first sign of xray dermatitus is 
After each use the leaded apron must be 
The amount of radiation a person recieves
Xrays are mose effectively stopped by
The operator must avoid  all of the following EXCEPT 
The lead diaphragm determines the size and shape of the
The best type of xray to penetrate body tissue is 
If patient is reluctant to be radiographed, the auxillary should 
The most effective way to reduce gonadel exposure from xrays is...
The best technique for reducing the radiation exposure to both patient...
If the end of the xray cone approximates the tip of the patients nose,...
The periapical film reveals
The detection of interproximal carries is best seen by a 
Accumulated radiation dosage for those who work with radiation may not...
To increase the penetrating power of an xray beam, the auxiliary must
The basic principle of bisenting the angle technique is 
A material or substance that does stop or absorb xrays is known...
Exposure of a radiograph on a child
The raised button on the radiograph aids in 
Two films are developed for the same length of time but at different...
In the paralleling technique, a device used to hold the film in the...
The quality, or penetrating power, of secondary radiation is 
Cephalometric radiographs are used in which area of dentistry
Extraoral films are placed in rigid frames called
Black lines across the film may be the result of 
When exposing the patient to only one periapical radiograph, the...
Proper collimation for the film size and target-film distance...
The developing solution
The best way to dry processed film manually is to
The optimum time-temperature relationship for processing dental...
The time period between the effects of cumulative radiation and...
The temperature of the radiographic processing solutions is adjusted...
A panorex film that exhibits distortion in the region and is lighter...
Which of these is not a factor when considering what size film to use?
If the mA is increased while the kVp adnd exposure time are kept...
Which extraoral film is used to visualize the sinus?
All of the tissues listed are radiopaque EXCEPT
X-ray films should be kept by the dentist along with other records for
Film speed is determined by the 
Filtration of the xray beam protects the patient by 
The side of the nose is called the
The fixing solution is 
Intensifying screens
For maximum penetration of xrays, which of the following combinations...
The housing of the xray tube is
Reticulation is
The chemicals used in processing solutions are dissolved in 
Which of these appears radiolucent?
What is the long, narrow, and radiolucent area visible below the roots...
Maximum protection of the patient requires that the xray beam pass...
If a film is exposed on the wrong side, the result will be 
A material or substance that does not stop or absorb xrays is known...
A dental assistant may expose radiographs
Vertical angulation in the bisecting technique for the same radiograph...
If a radiograph remains in the developing solution too long, the film...
Foreshortening is caused by
Xrays are made up of
Fixing the film
The size of the collimated beam for intraoral radiology measured at...
The occlusal plane of the maxillary arch being radiographed should...
Appropriate infection control procedures during xray exposure should...
The thermometer used to measure the temperature of the processing...
Cone cutting results from
Which characteristics of xrays make them both beneficial and...
How often should the processing solutions be changed?
Periapical firlms should extend beyond the occlusal plane 
Interproximal film may show all of the following except
What term describes the U-shaped radiopaque structure often seen in...
What is the thin radiopaque band between the maxillary incisors...
During processing, when can radiographs safely be exposed to light?
As the target-film distance is increased, the
Which of these structures is radiopaque?
Films not fixed for a long enough period of time will appear
A latent image is 
Extraoral films are
If a properly processed film is left overnight  in the water it...
After the films are removed from from the fixer, they are washed for
The basic principle of the paralleling technique are all of the...
What is the radiopaque circular area below the apices of the...
A processed film reveals small white spots, indicating incomplete...
What is the small circular radiolucency near the roots of the...
If an unexposed film is processed, it will appear 
A logical sequence for a full mouth survey of a patient with a...
What term describes the heavily radiopaque midpoint of the mandible?
What is the small circular radiolucency below the mandibular incisor...
For the developing solutions to work, the solution must be
The strength of the safelight permitted in the dark room depends on...
Elongation is caused by
After a film is exposed, the target-film distance is doubled....
The dental auxillary is asked to change the 8-inch shortcone to the...
When taking a full mouth series of intraoral xrays the sagittal plane...
The best sequence for exposing maxillary radiographs is 
Firm placement of the film will help prevent
Milliamperage controls
The purpose of the lead foil in dental film is to 
Film is washed after removing it from the developing solution to
Films left overnight in the fixer
Which of these appears radiolucent?
The ala-tragus line is parallel to the floor when taking
What is the name of the diagonal radiopaque line visible at the lower...
A patient with an extemely narrow maxillary arch presents placement...
To visualize the two roots on the maxillary premolar, the central ray...
The dentists new xray machine has inherent filtration of 2 mm of...
What is the large radiolucent area shown on maxillary molar...
Radiographs of edentulous portions of a patients mouth
The principle used in panoramic radiography is
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