Dental Assisting Quiz Questions

Exposing radiographs is a skill that requires proper technique each and every time. This implies that there is no room for error or inconsistency when taking radiographs. It is crucial to follow the correct procedure and use the appropriate techniques to ensure accurate and high-quality results. This is important for diagnostic purposes and to minimize any potential harm or risks to the patient. Therefore, the statement "Exposing radiographs is a skill that requires proper technique each and every time" is true.

The statement is false because digital x-ray technology is actually becoming more affordable and accessible to dentists. It has several advantages over traditional x-rays, such as lower radiation exposure and the ability to instantly view and share images. This technology has been widely adopted in dental practices, allowing dentists to provide better and more efficient care to their patients.

Digital intraoral imaging is a computerized system that allows dentists to capture and store images of a patient's mouth. One of the advantages of this technology is the ability to alter the brightness and contrast of the images. This feature enables dentists to enhance the visibility of specific areas or details, making it easier to diagnose and treat dental conditions. Therefore, the statement that digital intraoral imaging has the ability to alter brightness/contrast is true.

The lead apron should never be folded because folding can cause cracks or damage to the protective lead lining. This can compromise its effectiveness in shielding against radiation. It is important to keep the lead apron flat and stored properly to ensure its integrity and continued protection for the wearer.

Dental professionals use imaging systems to assist in diagnosing and treating dental conditions. These imaging systems include X-ray machines, intraoral cameras, and 3D imaging scanners. These tools allow dentists to capture images of the teeth, gums, and jawbone, which help in identifying dental problems such as cavities, gum disease, and impacted teeth. By using imaging systems, dental professionals can provide accurate diagnoses and create effective treatment plans for their patients.

The statement suggests that the same number of films are taken for both adult and child fill mouth series, which is false. This implies that the number of films taken for adult and child fill mouth series is not equal.

Bitewing radiographs are commonly used in dentistry to capture images of the crowns of the upper and lower teeth. These radiographs are called "bitewings" because the patient bites down on a small tab or wing-shaped device that holds the film or sensor in place. The purpose of bitewing radiographs is to detect dental caries (cavities) and monitor the health of the interproximal areas, which are the spaces between the teeth. Therefore, it is correct to say that bitewing radiographs are also known as interproximal radiographs.

The statement is true because the paralleling technique is indeed used as a film-holding device. This technique involves aligning the X-ray beam perpendicular to the film or image receptor, ensuring that the X-rays pass through the patient's body parallel to each other. This helps in reducing distortion and producing accurate and clear images. By using the paralleling technique, the film or image receptor is securely held in place, allowing for precise positioning and minimizing the risk of movement or blurring during the X-ray procedure.

The statement is false because children are generally more sensitive to radiation than adults. Their developing bodies and organs are more susceptible to the harmful effects of radiation. Therefore, it is important to limit their exposure and adjust radiation doses accordingly to ensure their safety.

Labial mounting refers to the placement of radiographs with the dot or identification marker facing towards the operator. This allows for easier identification and orientation of the images. Therefore, the given statement is true.

The statement is false because dental radiographs are considered prescriptions, not proscriptions. Only trained dental professionals, such as dentists or dental hygienists, are allowed to take x-rays as they have the necessary knowledge and expertise to determine when and how many x-rays are needed for a patient's specific dental condition. Dental assistants are not authorized to make such decisions and should not take x-rays without the supervision or direction of a trained dental professional.

The focal trough of the panoramic machine refers to the specific area where the images produced are in focus and have maximum sharpness. It is also referred to as the image layer or sharpness because it represents the optimal plane where the images are clear and well-defined. Therefore, the statement "The focal trough of the panoramic machine is also known as image layer or sharpness" is true.

Sewage treatment facilities do not permit developer and fixer solutions to be poured down the sink drain. These solutions contain harmful chemicals that can contaminate the water supply and harm the environment. Proper disposal methods should be followed to ensure the safe handling of these solutions.

Panoramic radiography is a dental imaging technique that captures a wide-angle view of the entire oral cavity, including the teeth, jaws, and surrounding structures. It is based on the principle of tomography, which involves capturing images of specific layers or sections of the body while blurring out other areas. In panoramic radiography, the x-ray tube and film/detector rotate around the patient's head, capturing images at different angles. These images are then combined to create a single panoramic image. Therefore, the statement that the fundamental principle of panoramic radiography is based on the principle of tomography is true.

The statement is false because the cervical collar on the lead apron is designed to protect the neck and cervical spine, not the reproductive organs. The lead apron itself is used to shield the reproductive organs from radiation exposure.

The quality of radiation is determined by kilovoltage. Kilovoltage refers to the amount of energy that is applied to the x-ray tube, which in turn affects the penetration and quality of the radiation produced. Higher kilovoltage results in higher energy x-rays that can penetrate deeper into the patient's body, resulting in better image quality. Milliamperage, on the other hand, determines the quantity or amount of radiation produced, but does not affect the quality. Therefore, kilovoltage is the key factor in determining the quality of radiation.

The lead diaphragm is commonly known as a collimator. A collimator is a device used to narrow down or restrict the size of a beam of particles or waves. In the context of radiology, a collimator is used to shape and limit the X-ray beam, ensuring that only the desired area is exposed to radiation. The lead diaphragm within the collimator helps to block and shape the X-ray beam, reducing scatter and improving image quality. Therefore, collimator is the correct term for the lead diaphragm in this case.

Using E-speed film instead of D-speed film will not reduce the developing time. The speed of the film refers to its sensitivity to light, with E-speed being less sensitive than D-speed film. However, the developing time is determined by the chemical process required to develop the film, and it is not affected by the film's speed. Therefore, the statement is false.

Milliamperage determines the amount or quantity of radiation. Milliamperage refers to the current or flow of electrons through the X-ray tube. Increasing the milliamperage will result in a higher quantity of radiation being produced, while decreasing the milliamperage will reduce the amount of radiation. The milliamperage setting is an important factor in controlling the exposure and ensuring appropriate radiation dose for the patient.

The focal spot refers to the area on the tungsten target where the electron hit. When electrons strike the target, they create X-rays that are emitted from a small region known as the focal spot. This spot is crucial in determining the resolution and clarity of the resulting X-ray image. A smaller focal spot size leads to a sharper image with better detail, while a larger focal spot size may result in a blurrier image with reduced detail.

The given statement is incorrect. The storage phosphor imaging is not another type of direct digital imaging system. It is a type of computed radiography (CR) system that uses a storage phosphor plate to capture and store X-ray images. These images are then read and converted into digital format using a laser scanner. Direct digital imaging systems, on the other hand, use digital detectors such as amorphous selenium or amorphous silicon to directly capture and convert X-ray images into digital format without the need for a separate storage medium. Hence, the correct answer is False.

The temperature for automatic processing is around 90 degrees.

The statement is false because the direct digital image system does not convert traditional film xrays to digital images. Instead, it captures digital images directly without the need for film.

Occlusal radiographs are used to view the presence of supernumerary teeth, cysts, and impacted teeth. These radiographs provide a clear view of the occlusal surface of the teeth and the surrounding structures, allowing for the detection of any abnormalities or pathologies such as supernumerary teeth, cysts, and impacted teeth. Therefore, options 2, 3, and 5 are correct as they include these conditions that can be viewed using occlusal radiographs.

CCD stands for Charge-Coupled Device, which is a type of image receptor commonly used in dental digital radiology. It is widely used due to its high resolution and sensitivity to light, making it suitable for capturing detailed dental images. PID, on the other hand, stands for Position Indicating Device, which is not an image receptor but a component used to align the X-ray beam. Therefore, the correct answer is CCD.

The given statement is false because when x-rays strike the film, the information is not recorded digitally. Instead, the x-rays create a latent image on the film, which is then developed using chemicals to create a visible image. This process is known as traditional or analog imaging, not digital imaging.

Labial mounting is when the depressed dot is away from the operator, as if the operator is viewing the films from outside in. Therefore, the correct answer is False.