5dd MCQs 242 Orthodontic Prof. Mom Sovannrithy 2019

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5dd MCQs 242 Orthodontic Prof. Mom Sovannrithy 2019 - Quiz

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Questions and Answers
  • 1. 

    Lower incline bite plane use for correcting?

    • A.

      Simple anterior cross bite

    • B.

      Posterior cross bite

    • C.

      Unilateral cross bite

    • D.

      Bilateral cross bite

    Correct Answer
    A. Simple anterior cross bite
    Explanation
    A simple anterior cross bite refers to a condition where the upper front teeth sit behind the lower front teeth when the jaws are closed. In this case, a lower incline bite plane can be used to correct the cross bite. The lower incline bite plane helps to reposition the lower jaw and bring the lower teeth forward, allowing them to align properly with the upper teeth. By using a lower incline bite plane, the cross bite can be corrected and the teeth can be aligned in the correct position.

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  • 2. 

    What is the lower incline bite plane?

    • A.

      An appliance for correct simple cross bite

    • B.

      Fixed appliance

    • C.

      Removable appliance

    • D.

      Functional appliance

    Correct Answer
    A. An appliance for correct simple cross bite
    Explanation
    The lower incline bite plane is an appliance used to correct a simple cross bite. It can be either fixed or removable, depending on the specific needs of the patient. This appliance helps to realign the lower teeth and correct the bite by creating a gentle incline on the lower teeth, allowing them to fit properly with the upper teeth. It is an effective treatment option for individuals with a simple cross bite, helping to improve their overall oral health and function.

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  • 3. 

    Lower incline bite plane cover the teeth of ?

    • A.

      Lower labial segment

    • B.

      Lower buccal segment

    • C.

      Upper labial segment

    • D.

      Upper buccal segment

    Correct Answer
    A. Lower labial segment
    Explanation
    The lower incline bite plane covers the teeth of the lower labial segment. This means that the lower incline bite plane is designed to provide support and protection to the teeth in the lower front part of the mouth. It helps to evenly distribute the forces exerted on these teeth during biting and chewing, preventing excessive wear and damage.

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  • 4. 

    Lower incline bite plane we make incline in?

    • A.

      45 degree

    • B.

      30 degree

    • C.

      15 degree

    • D.

      60 degree

    Correct Answer
    A. 45 degree
    Explanation
    The question is asking about the angle at which a lower incline bite plane should be made. The correct answer is 45 degrees. This means that when creating a lower incline bite plane, it should be inclined at a 45-degree angle.

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  • 5. 

    How many bend orders is the most comment use in orthodontic?

    • A.

      3

    • B.

      2

    • C.

      4

    • D.

      5

    Correct Answer
    A. 3
    Explanation
    The most common use in orthodontics is to have 3 bend orders. This means that orthodontic treatment typically involves three different types of bends in the wire used to straighten teeth. These bends help to apply the necessary force and pressure to move the teeth into their desired positions. Having three bend orders allows for more precise and effective tooth movement, resulting in better treatment outcomes.

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  • 6. 

    What is the 2nd bend order mean?

    • A.

      Tiping

    • B.

      Torqueing

    • C.

      In-out

    • D.

      Up-down

    Correct Answer
    A. Tiping
    Explanation
    The second bend order refers to the bending of the tip of a fishing rod while casting. It is a measure of the flexibility and responsiveness of the rod. When the rod has a higher second bend order, it means that the tip of the rod bends more easily and has a greater degree of flexibility. This can be beneficial for casting lighter lures or for casting with greater accuracy and control.

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  • 7. 

    The most comment used of wire in fixed appliance is?

    • A.

      Rectangular and round

    • B.

      Round and triangle

    • C.

      Rectangular and triangle

    • D.

      Bending wires

    Correct Answer
    A. Rectangular and round
    Explanation
    Rectangular and round wires are commonly used in fixed appliances because they provide stability and strength. Rectangular wires are often used for added control and torque, while round wires are used for general alignment and movement. The combination of these two types of wires allows for effective and efficient functioning of fixed appliances.

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  • 8. 

    How many direction do fixed appliance can do?

    • A.

      6

    • B.

      4

    • C.

      5

    • D.

      3

    Correct Answer
    A. 6
    Explanation
    Fixed appliances can have six directions because they can move up, down, left, right, forward, and backward. This means that they have the ability to move in all three dimensions.

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  • 9. 

    Which one is the auxiliaries’ component in fixed appliance?

    • A.

      Power chain

    • B.

      Brackets

    • C.

      Wire

    • D.

      Molar bend

    Correct Answer
    A. Power chain
    Explanation
    The auxiliaries' component in a fixed appliance is the power chain. A power chain is a series of elastic or rubber bands that are used to connect the brackets and apply continuous pressure on the teeth. This helps in closing gaps or aligning the teeth properly. Brackets are the small metal or ceramic attachments that are bonded to the teeth, while wires are used to apply pressure and move the teeth. Molar bend is a specific type of wire bend used in orthodontics.

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  • 10. 

    What is the clinical feature of fixed appliance?

    • A.

      Bonded bracket to the teeth

    • B.

      Fixed brackets to removable appliance

    • C.

      Bonded bracket to an appliance

    • D.

      The appliance that can be remove

    Correct Answer
    A. Bonded bracket to the teeth
    Explanation
    The clinical feature of a fixed appliance is the bonding of brackets to the teeth. This means that the brackets are attached to the teeth using dental adhesive, providing a stable and permanent attachment. This allows for precise control and manipulation of the teeth during orthodontic treatment. The brackets are not attached to a removable appliance or any other type of appliance, but directly to the teeth themselves.

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  • 11. 

    What is the most common appliances to avoid for adult orthodontic?

    • A.

      Head Gear and Face Mask

    • B.

      Removable appliance

    • C.

      Fixed appliance

    • D.

      Lingual brace

    Correct Answer
    A. Head Gear and Face Mask
    Explanation
    Adult orthodontic treatment typically involves the use of braces or aligners to correct misalignment of the teeth. Head gear and face masks are not commonly used appliances in adult orthodontic treatment. These appliances are more commonly used in children and teenagers to correct severe bite problems. Adult orthodontic treatment usually focuses on using removable appliances, fixed appliances (such as braces or clear aligners), or lingual braces (braces attached to the back of the teeth) to achieve the desired tooth movement and alignment.

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  • 12. 

    What is the problem can increased risk of root resorption:?

    • A.

      No vital or root treated

    • B.

      Long roots.

    • C.

      Previously caries

    • D.

      Light forces

    Correct Answer
    A. No vital or root treated
    Explanation
    The increased risk of root resorption can be attributed to teeth that have not received any vital or root treatment. When a tooth is left untreated, it can become more susceptible to root resorption, which is the process of the roots of the teeth breaking down and being absorbed by the body. Therefore, the lack of any treatment for the tooth can lead to an increased risk of root resorption.

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  • 13. 

    What is the risk of orthodontic treatment?

    • A.

      Root resorption

    • B.

      Carries

    • C.

      Periodontal disease

    • D.

      Bone fracture

    Correct Answer
    A. Root resorption
    Explanation
    Root resorption is a potential risk of orthodontic treatment. This refers to the shortening or loss of the tooth roots due to the pressure exerted by braces or other orthodontic appliances. It occurs when the cells responsible for breaking down and rebuilding bone become overactive. Root resorption can lead to tooth instability, sensitivity, and even tooth loss in severe cases. Therefore, it is important for orthodontists to closely monitor patients during treatment to minimize the risk of root resorption.

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  • 14. 

    What is the most comment risk in orthodontic treatment?

    • A.

      Relapse

    • B.

      Retention

    • C.

      Over correction

    • D.

      Good digitation

    Correct Answer
    A. Relapse
    Explanation
    Relapse is the most common risk in orthodontic treatment. After braces are removed, there is a tendency for teeth to shift back to their original positions. This occurs because the bone and tissues surrounding the teeth need time to stabilize and adapt to the new alignment. Without proper retention, the teeth can relapse and return to their previous misaligned positions. Therefore, it is crucial for orthodontic patients to wear retainers as instructed by their orthodontist to prevent relapse and maintain the desired results of the treatment.

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  • 15. 

    What is the meaning of balancing extraction?

    • A.

      Extraction Both side in one arch

    • B.

      Extraction upper and lower tooth in both side

    • C.

      Extraction upper and lower tooth in one side

    • D.

      Both side in two arches

    Correct Answer
    A. Extraction Both side in one arch
    Explanation
    The meaning of balancing extraction is the removal of teeth from both sides of the same arch. This implies that teeth are extracted from both the left and right sides of either the upper or lower arch, ensuring a balanced extraction approach.

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  • 16. 

    What is the meaning of compensating extraction?

    • A.

      Upper and lower teeth in both arches

    • B.

      Upper and lower tooth in one side

    • C.

      Both side in one arch

    • D.

      Both side in two arches

    Correct Answer
    A. Upper and lower teeth in both arches
    Explanation
    Compensating extraction refers to the removal of both upper and lower teeth in both arches. This means that teeth from both the upper and lower jaws are extracted to achieve a balanced and harmonious bite. This procedure is often done to correct severe dental misalignments or skeletal discrepancies.

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  • 17. 

    Why we use retainer after finishing orthodontic treatment?

    • A.

      Preventing teeth relapse

    • B.

      Allow teeth eruption

    • C.

      Allow growth change

    • D.

      Prevent 3rd molars eruption

    Correct Answer
    A. Preventing teeth relapse
    Explanation
    After finishing orthodontic treatment, the use of a retainer is important to prevent teeth relapse. Without a retainer, the teeth may gradually shift back to their original position over time. The retainer helps to maintain the new alignment achieved by the orthodontic treatment, ensuring that the teeth stay in their proper position. This helps to preserve the results of the treatment and prevent any regression or relapse of the teeth.

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  • 18. 

    What is the factor related to retention to be consider at the treatment planning stage?

    • A.

      Type of retention

    • B.

      Growth spurt

    • C.

      Extraction decision

    • D.

      Growth modification

    Correct Answer
    A. Type of retention
    Explanation
    The factor related to retention that needs to be considered at the treatment planning stage is the type of retention. This refers to the method or appliance that will be used to maintain the position of the teeth after the orthodontic treatment is complete. Different types of retention options include removable retainers, fixed retainers, or a combination of both. The choice of retention will depend on various factors such as the patient's individual needs, the complexity of the case, and the orthodontist's recommendation.

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  • 19. 

    Which one the factor may modify retention protocol?

    • A.

      Lower incisors alignment

    • B.

      Crowding

    • C.

      Missing teeth

    • D.

      Dental caries

    Correct Answer
    A. Lower incisors alignment
    Explanation
    Lower incisors alignment may modify the retention protocol because the alignment of the lower incisors plays a crucial role in the overall stability and alignment of the teeth. If the lower incisors are misaligned or crowded, it can affect the occlusion and stability of the entire dental arch. Therefore, in order to maintain proper retention after orthodontic treatment, it may be necessary to address and modify the lower incisors alignment.

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  • 20. 

    What is the condition that requires short term retention?

    • A.

      Deep bite

    • B.

      Expanded arches

    • C.

      Serial extraction procedures

    • D.

      Midline shift

    Correct Answer
    A. Deep bite
    Explanation
    Short term retention is a condition that requires the patient to wear a retainer for a short period of time after orthodontic treatment. A deep bite refers to when the upper front teeth excessively overlap the lower front teeth when biting down. This misalignment can cause various issues such as discomfort, speech problems, and difficulty chewing. To correct a deep bite, orthodontic treatment is often required, and after the treatment, a short term retention phase is necessary to ensure that the teeth stay in their new positions. Therefore, deep bite is the correct answer for the condition that requires short term retention.

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  • 21. 

    Which condition that require long term retention?

    • A.

      Severe rotation

    • B.

      High place canines in class one extraction cases

    • C.

      Posterior cross bite in patients having step cusp

    • D.

      Extraction cases

    Correct Answer
    A. Severe rotation
    Explanation
    Severe rotation is a condition that requires long-term retention because it involves the misalignment of teeth, where a tooth is rotated or twisted in its position. In order to correct this condition, orthodontic treatment is required, which often involves braces or other appliances. After the treatment, the teeth need to be retained in their corrected positions for a prolonged period of time to prevent them from shifting back to their original rotated positions. This is why severe rotation requires long-term retention.

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  • 22. 

    Which condition that does not require retention?

    • A.

      Anterior cross bite

    • B.

      Sever rotation

    • C.

      Median diastema

    • D.

      Deep bite

    Correct Answer
    A. Anterior cross bite
    Explanation
    An anterior cross bite refers to a condition where the top front teeth are positioned behind the bottom front teeth when the jaws are closed. This condition does not require retention because it can be corrected through various orthodontic treatments such as braces or clear aligners. Retention is typically needed after orthodontic treatment to prevent teeth from shifting back to their original positions. However, in the case of an anterior cross bite, once the correction is made, there is no need for retention as the teeth will naturally remain in their corrected positions.

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  • 23. 

    Which classification of malocclusion, Over jet is increased?

    • A.

      Class II division 1 malocclusion

    • B.

      Class III malocclusion

    • C.

      Class II division 2 malocclusion

    • D.

      Class I malocclusion

    Correct Answer
    A. Class II division 1 malocclusion
    Explanation
    In Class II division 1 malocclusion, the overjet is increased. Overjet refers to the horizontal distance between the upper and lower incisors. In this type of malocclusion, the upper front teeth are positioned significantly forward in relation to the lower front teeth, resulting in an increased overjet. This can lead to an overbite and a protrusive appearance of the upper teeth.

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  • 24. 

    Which one is the Over jet of Class I malocclusion?

    • A.

      Upper incisors are Proclined and OJ =3mm

    • B.

      Upper incisors are Proclined and OJ < 2mm

    • C.

      Upper incisors are Retroclined OJ = 1mm

    • D.

      Upper incisors are Proclined and OJ>4mm

    Correct Answer
    A. Upper incisors are Proclined and OJ =3mm
    Explanation
    The correct answer is "Upper incisors are Proclined and OJ =3mm." In Class I malocclusion, the upper incisors are proclined, meaning they are inclined or tilted forward. The overjet (OJ) refers to the horizontal distance between the upper and lower incisors. An overjet of 3mm indicates that the upper incisors are positioned 3mm ahead of the lower incisors when the teeth are in a normal bite position. This is a characteristic feature of Class I malocclusion.

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  • 25. 

    Which one the most likely the Over jet of Class II division1 malocclusion?

    • A.

      Upper incisors are Proclined, OJ>4mm

    • B.

      Upper incisors are Proclined, OJ < 2mm

    • C.

      Upper incisors are Retroclined , OJ = 1mm

    • D.

      Upper incisors are Proclined, OJ =3mm

    Correct Answer
    A. Upper incisors are Proclined, OJ>4mm
    Explanation
    The most likely Over jet of Class II division1 malocclusion is when the upper incisors are proclined and the overjet is greater than 4mm. This means that the upper front teeth are positioned too far forward in relation to the lower teeth, resulting in a significant horizontal gap between the upper and lower incisors. This is a common characteristic of Class II division 1 malocclusion, where the upper jaw is protruded and the lower jaw is retruded.

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  • 26. 

    Which is the Over jet of Class II division 2 malocclusion?

    • A.

      Upper incisors are retroclined, OJ

    • B.

      Upper incisors are retroclined ,OJ = 1 mm

    • C.

      Upper incisors are Proclined, OJ>4mm

    • D.

      Upper incisors are proclined , OJ =3mm

    Correct Answer
    A. Upper incisors are retroclined, OJ
  • 27. 

    Which one the most likely the Over jet of Class III malocclusion?

    • A.

      Upper incisors are Proclined OJ

    • B.

      Upper incisors are Proclined, OJ > 3mm

    • C.

      Upper incisors are Proclined and OJ>7mm

    • D.

      Upper incisors are Proclined and OJ =3mm

    Correct Answer
    A. Upper incisors are Proclined OJ
    Explanation
    The most likely Overjet (OJ) of Class III malocclusion would be "Upper incisors are Proclined OJ." This means that the upper incisors are tilted forward (proclined) and there is an overjet present, indicating that the upper front teeth are positioned in front of the lower front teeth. This is a common characteristic of Class III malocclusion, where the lower jaw is protruded or the upper jaw is retruded, causing the upper incisors to be proclined and creating an increased overjet.

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  • 28. 

    When the lower incisor edges lie posterior to the cingulum plateau of the upper incisor and Upper incisors are Proclined?

    • A.

      Class II div 1

    • B.

      Class I

    • C.

      Class II DIV 2

    • D.

      Class III

    Correct Answer
    A. Class II div 1
    Explanation
    When the lower incisor edges lie posterior to the cingulum plateau of the upper incisor and the upper incisors are proclined, it indicates a Class II div 1 malocclusion. In this type of malocclusion, the upper incisors are proclined (tipped forward) and the lower incisors are positioned further back than they should be, causing an overbite. This results in a Class II relationship between the upper and lower jaws, with the upper teeth protruding further forward than the lower teeth.

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  • 29. 

    When the lower incisor edges lie posterior to the cingulum plateau of the upper incisor with retrocline?

    • A.

      Class II DIV 2

    • B.

      Class I malocclusion

    • C.

      Class II div 1

    • D.

      Class III

    Correct Answer
    A. Class II DIV 2
    Explanation
    When the lower incisor edges lie posterior to the cingulum plateau of the upper incisor with retrocline, it indicates Class II DIV 2 malocclusion. This means that the upper incisors are inclined backwards (retrocline) and the lower incisors are positioned further back (posterior) than the upper incisors. Class II DIV 2 malocclusion is characterized by a deep overbite and a convex profile.

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  • 30. 

    When the lower incisor edges occlude into cingulum plateau of the upper is?

    • A.

      Class I

    • B.

      Class II div 1

    • C.

      Class II DIV 2

    • D.

      Class III

    Correct Answer
    A. Class I
    Explanation
    When the lower incisor edges occlude into the cingulum plateau of the upper incisors, it indicates a Class I occlusion. In Class I occlusion, the upper and lower teeth are properly aligned, with the upper incisors slightly overlapping the lower incisors. This is the ideal occlusion where the teeth fit together correctly and there is no malocclusion present.

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  • 31. 

    When the lower incisor edges lie Anterior to the cingulum plateau of the upper?

    • A.

      Class III

    • B.

      Class I

    • C.

      Class II div 1

    • D.

      Class II DIV 2

    Correct Answer
    A. Class III
    Explanation
    When the lower incisor edges lie anterior to the cingulum plateau of the upper, it indicates a Class III malocclusion. In Class III malocclusion, the lower jaw is positioned more forward than the upper jaw, causing the lower incisors to protrude in front of the upper incisors. This is also known as an underbite. Class I refers to a normal occlusion where the teeth are properly aligned, while Class II div 1 and Class II div 2 refer to different types of overbites where the upper teeth protrude over the lower teeth.

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  • 32. 

    Which one is OJ of the Class I malocclusion?

    • A.

      Average

    • B.

      Increase

    • C.

      Decrease

    • D.

      Severe

    Correct Answer
    A. Average
    Explanation
    The correct answer is "Average". In Class I malocclusion, the upper teeth slightly overlap the lower teeth. This is considered the most common and mild form of malocclusion, where the bite is relatively normal but there may be slight misalignment or crowding of the teeth. The terms "Increase", "Decrease", and "Severe" do not accurately describe Class I malocclusion.

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  • 33. 

    Which one is the most likely OJ for Class II div 1 malocclusion?

    • A.

      Increase

    • B.

      Decrease

    • C.

      Average

    • D.

      Severe

    Correct Answer
    A. Increase
    Explanation
    The most likely OJ (overjet) for Class II div 1 malocclusion is an increase. Class II div 1 malocclusion is characterized by a protrusion of the upper front teeth and a retrusion of the lower jaw. This results in an increased overjet, which is the horizontal distance between the upper and lower incisors when the teeth are in a biting position. Therefore, an increase in the overjet is expected in this type of malocclusion.

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  • 34. 

    Which one is OJ of Class III malocclusion?

    • A.

      Decrease

    • B.

      Increase

    • C.

      Average

    • D.

      Severe

    Correct Answer
    A. Decrease
    Explanation
    The correct answer is "Decrease" because Class III malocclusion refers to a condition where the lower jaw protrudes forward, causing the lower teeth to overlap the upper teeth. In this case, the term "decrease" suggests that the lower jaw is moving back or retracting, which would help correct the malocclusion by aligning the teeth and improving the bite.

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  • 35. 

    Which one is likely Overbite in Class I malocclusion?

    • A.

      20-30%

    • B.

      0-10%

    • C.

      10-20%

    • D.

      50-80%

    Correct Answer
    A. 20-30%
    Explanation
    The correct answer is 20-30%. In Class I malocclusion, the upper teeth slightly overlap the lower teeth. Overbite refers to the vertical overlap of the upper and lower front teeth. A normal overbite ranges from 20-30% where the upper teeth overlap the lower teeth by about one-third. Therefore, the option 20-30% is likely to represent the overbite in Class I malocclusion.

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  • 36. 

    Which plane we use to find Overbite?

    • A.

      Vertical

    • B.

      Transversal

    • C.

      Horizontal

    • D.

      Posterior-anterior

    Correct Answer
    A. Vertical
    Explanation
    The vertical plane is used to find overbite. Overbite refers to the vertical overlap of the upper and lower front teeth when the jaws are closed. By examining the vertical relationship between the upper and lower teeth, the vertical plane can help determine the extent of overbite.

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  • 37. 

    Which one is Overbite in Class III malocclusion?

    • A.

      0-10%

    • B.

      40-60%

    • C.

      20-30%

    • D.

      50-80%

    Correct Answer
    A. 0-10%
    Explanation
    In Class III malocclusion, overbite refers to the vertical overlap of the upper and lower front teeth. A smaller overbite indicates that the upper front teeth are more forwardly placed in relation to the lower front teeth. Therefore, the correct answer is 0-10% because it represents a smaller vertical overlap of the front teeth, indicating an overbite in Class III malocclusion.

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  • 38. 

    Which is ANB of Class I skeletal pattern?

    • A.

      2-4 degree

    • B.

      1-2 degree

    • C.

      4-6 degree

    • D.

      6-8 degree

    Correct Answer
    A. 2-4 degree
    Explanation
    The ANB of Class I skeletal pattern is 2-4 degrees. This measurement represents the relationship between the position of the maxilla (upper jaw) and the mandible (lower jaw). In a Class I skeletal pattern, the maxilla and mandible are properly aligned, resulting in a balanced and harmonious facial profile. An ANB measurement of 2-4 degrees indicates a normal or slightly protrusive mandible in relation to the maxilla.

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  • 39. 

    Which one is the most likely ANB angle in Class II skeletal pattern?

    • A.

      6-8 degree

    • B.

      1-2 degree

    • C.

      2-4 degree

    • D.

      3-4 degree

    Correct Answer
    A. 6-8 degree
    Explanation
    The most likely ANB angle in Class II skeletal pattern is 6-8 degrees. This is because Class II skeletal pattern is characterized by a retruded mandible, resulting in a larger ANB angle. The ANB angle represents the relationship between the maxilla and the mandible, with a larger angle indicating a more severe Class II malocclusion. Therefore, the range of 6-8 degrees is the most likely ANB angle in this case.

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  • 40. 

    What is the ANB angle in Class III skeletal pattern?

    • A.

      0-1 degree

    • B.

      2-4 degree

    • C.

      4-6 degree

    • D.

      6-8 degree

    Correct Answer
    A. 0-1 degree
    Explanation
    The ANB angle in Class III skeletal pattern is typically 0-1 degree. This angle is used to assess the relationship between the maxilla (A point) and the mandible (B point) in relation to the cranial base (N point). In Class III skeletal pattern, the mandible is positioned more anteriorly in relation to the maxilla, resulting in a negative or very small ANB angle.

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  • 41. 

    Which one is the best treatment for crowding?

    • A.

      Extraction

    • B.

      Closing space

    • C.

      Derotation

    • D.

      Proclined upper incisors

    Correct Answer
    A. Extraction
    Explanation
    Extraction is considered the best treatment for crowding because it involves removing one or more teeth to create space and align the remaining teeth properly. This allows for better alignment and prevents further crowding or overlapping of teeth. Other options like closing space, derotation, or proclined upper incisors may not effectively address the issue of crowding and may not provide long-term stability. Extraction is a common and effective treatment approach for crowding, especially in cases where the crowding is severe.

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  • 42. 

    For spacing which one is the best treatment?

    • A.

      Closing space

    • B.

      Extraction

    • C.

      Derotation

    • D.

      Proclined upper incisors

    Correct Answer
    A. Closing space
    Explanation
    Closing space is the best treatment for spacing between teeth. This involves moving the teeth closer together to eliminate the gaps. It can be achieved through various orthodontic techniques such as braces or aligners. Closing space is preferred over extraction because it preserves the natural teeth and maintains a harmonious balance in the dental arch. Derotation and proclined upper incisors are not relevant to treating spacing between teeth.

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  • 43. 

    Which is the common treatment for tooth rotation?

    • A.

      Derotation

    • B.

      Closing space

    • C.

      Extraction

    • D.

      Proclined upper incisors

    Correct Answer
    A. Derotation
    Explanation
    Derotation is the common treatment for tooth rotation. This involves using orthodontic techniques to correct the position of the rotated tooth and bring it back into alignment with the other teeth. This can be done using braces, retainers, or other appliances to gradually apply pressure and guide the tooth into its proper position. Closing space refers to closing gaps between teeth, extraction involves removing a tooth, and proclined upper incisors refers to the forward positioning of the upper front teeth.

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  • 44. 

    Which one is the best treatment for anterior cross bite?

    • A.

      Proclined upper incisors

    • B.

      Closing space

    • C.

      Extraction

    • D.

      Derotation

    Correct Answer
    A. Proclined upper incisors
    Explanation
    Proclined upper incisors is the best treatment for anterior cross bite because it involves moving the upper front teeth forward. This helps to correct the misalignment of the upper and lower teeth, improving the bite and overall alignment of the jaw. Closing space, extraction, and derotation may be treatments for other dental issues, but they are not specifically targeted towards correcting anterior cross bite.

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  • 45. 

    Which one is orthodontic treatment for spacing teeth?

    • A.

      Space closure

    • B.

      Crown bridge

    • C.

      Implant

    • D.

      Space closures

    Correct Answer
    A. Space closure
    Explanation
    Space closure is the orthodontic treatment for spacing teeth. This procedure involves moving the teeth together to close the gaps between them. It can be achieved through various methods such as using braces, aligners, or other orthodontic appliances. Space closure is a common treatment option for individuals who have gaps between their teeth and wish to achieve a more aligned and aesthetically pleasing smile. Crown bridge, implant, and space closures are not specifically aimed at closing gaps between teeth, making them incorrect options for orthodontic treatment for spacing teeth.

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  • 46. 

    What is the most comment decision for making crown bridge?

    • A.

      Spacing

    • B.

      Crowding

    • C.

      Rotation

    • D.

      Tooth impacted

    Correct Answer
    A. Spacing
    Explanation
    Spacing is the most common reason for making a crown bridge. This refers to the gaps or spaces between teeth, which can occur due to various reasons such as missing teeth or natural gaps in the dental arch. A crown bridge is a dental restoration that is used to fill in these spaces and improve the appearance and functionality of the teeth. By placing a crown bridge, the gaps can be closed and the patient can achieve a more aesthetically pleasing smile.

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  • 47. 

    Which one is the most comment decision for extraction teeth?

    • A.

      Crowding

    • B.

      Spacing

    • C.

      Rotation

    • D.

      Tooth impacted

    Correct Answer
    A. Crowding
    Explanation
    The most common reason for extraction of teeth is crowding. Crowding occurs when there is not enough space in the mouth for all the teeth to properly align. This can lead to overlapping or twisted teeth, which can affect the overall alignment and appearance of the smile. In such cases, extraction of one or more teeth may be necessary to create enough space for the remaining teeth to align properly.

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  • 48. 

    A 12 years old girl come to orthodontics department at the UHS to check her teeth she complain of her front teeth are sticky out both arches with incompetent lips and her facial profile is more convexity . Which one is the most likely clinical feature of this sign?

    • A.

      Bimaxillary protrusion

    • B.

      Crowding

    • C.

      Spacing

    • D.

      Rotation

    Correct Answer
    A. Bimaxillary protrusion
    Explanation
    The most likely clinical feature of the given signs is bimaxillary protrusion. This is indicated by the girl's complaint of her front teeth sticking out in both arches, along with incompetent lips and a more convex facial profile. Bimaxillary protrusion refers to the protrusion of both the upper and lower jaws, causing the front teeth to be pushed forward.

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  • 49. 

    A 12 years old girl come to orthodontics department at the UHS to check her teeth she complain of her front teeth are sticky out both arches with tongue trust and her facial profile is more convexity . Which one is the most likely clinical feature of lips?

    • A.

      Incompetent lips

    • B.

      Competent lips

    • C.

      Everted lips

    • D.

      Inverted lips

    Correct Answer
    A. Incompetent lips
    Explanation
    The most likely clinical feature of lips in this case is incompetent lips. Incompetent lips refer to lips that are unable to maintain proper closure at rest, resulting in the front teeth sticking out and a more convex facial profile. This is consistent with the girl's complaint of her front teeth sticking out and her facial profile showing increased convexity.

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  • 50. 

    A 12 years old girl come to orthodontics department at the UHS to check her teeth she complain of her front teeth are sticky out both arches with incompetent lips and her facial profile is more convexity . Which one is the most likely cause by?

    • A.

      Tongue trust

    • B.

      Lips trap

    • C.

      Moth breaching

    • D.

      Thumb sucking

    Correct Answer
    A. Tongue trust
    Explanation
    The most likely cause for the girl's front teeth sticking out, incompetent lips, and a more convex facial profile is tongue thrust. Tongue thrust refers to the habit of pushing the tongue against the front teeth during swallowing or at rest, which can lead to dental malocclusions and changes in facial appearance. This habit can disrupt the normal positioning and alignment of the teeth, causing them to protrude.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Jul 12, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 06, 2019
    Quiz Created by
    Uhsdental
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