MCQ orthodontic

Orthodontics BDS nal exam msq




1. Lower incline bite plane use for correcting?
- Simple anterior cross bite
- Posterior cross bite
- Unilateral cross bite
- Bilateral cross bite
- Simple anterior cross bite


2. What is the lower incline bite plane?
- An appliance for correct simple cross bite
- Fixed appliance
- Removable appliance
- Functional appliance
- An appliance for correct simple cross bite


3. Lower incline bite plane cover the teeth of ?
- Lower buccal segment
- Lower labial segment
- Upper labial segment
- Upper buccal segment
- Lower labial segment



4. Lower incline bite plane we make incline in?
- 45 degree
- 30 degree
- 15 degree
- 60 degree
- 45 degree


5. How many bend orders is the most comment use in orthodontic?
-3
-2
-4
-5
-3


6. What is the 2nd bend order mean?



fi

,- Tiping
- Torqueing
- In-out
- Up-down
- Tiping


7. The most comment used of wire in fixed appliance is?
- Round and triangle
- Rectangular and triangle
- Bending wires
- Rectangular and round
- Rectangular and round


8. How many direction do fixed appliance can do?
-4
-5
-6
-3
-6
6✅


9. Which one is the auxiliaries' component in fixed appliance?
- Power chain
- Brackets
- Wire
- Molar bend
- Power chain


10. What is the clinical feature of fixed appliance?
- Fixed brackets to removable appliance
- Bonded bracket to the teeth
- Bonded bracket to an appliance
- The appliance that can be remove
- Bonded bracket to the teeth


11. What is the most common appliances to avoid for adult orthodontic?
- Head Gear and Face Mask
- Removable appliance
- Fixed appliance
- Lingual brace

,- Head Gear and Face Mask


12. What is the problem can increased risk of root resorption:?
- Long roots.
- Previously caries
- No vital or root treated
- Light forces

- No vital or root treated

13. What is the risk of orthodontic treatment?
- Root resorption
- Carries
- Periodontal disease
- Bone fracture
- Root resorption


14. What is the most comment risk in orthodontic treatment?
- relapse
- retention
- over correction
- good digitation
- relapse


15. What is the meaning of balancing extraction?
- Extraction upper and lower tooth in both side
- Extraction upper and lower tooth in one side
- Extraction Both side in one arch
- Both side in two arches
- Extraction Both side in one arch


16. What is the meaning of compensating extraction?
- Upper and lower teeth in both arches
- Upper and lower tooth in one side
- Both side in one arch
- Both side in two arches
- Upper and lower teeth in both arches


17. Why we use retainer after finishing orthodontic treatment?
- Preventing teeth relapse

, - Allow teeth eruption
- Allow growth change
- Prevent 3rd molars eruption
- Preventing teeth relapse


18. What is the factor related to retention to be consider at the treatment planning
stage?
- Type of retention
- Growth spurt
- Extraction decision
- Growth modification
- Type of retention


19. Which one the factor may modify retention protocol?
- Lower incisors alignment
- Crowding
- Missing teeth
- Dental caries
- Lower incisors alignment


20. What is the condition that requires short term retention?
- Deep bite
- Expanded arches
- Serial extraction procedures
- Midline shift
- Deep bite


21. Which condition that require long term retention?
- Severe rotation
- High place canines in class one extraction cases
- Posterior cross bite in patients having step cusp
- Extraction cases
- Severe rotation



22. Which condition that does not require retention?
- Anterior cross bite
- Sever rotation
- Median diastema
- Deep bite
- Anterior cross bite