1. Treatment option of anterior open bite?

Removable appliance with posterior bite plane

Removable appliance with anterior bite plane

Removable appliance with lower incline plane

Removable appliance with Z spriong

2. The most comment reasons for relapse is?

Rotation and spacing

Good digitation

Full unit class I,II,III

Enough OB

3. The most comment risks of orthodontics tooth movement?

Caries

Root resorption

Gingivitis

Good digitation

4. Which components can correct Anterior Crossbite?

upper inclined bite plane

Removable appliance with Z spring and posterior bite plane

Coffin spring

Functional appliance

5. Which one is the best treatment for simple anterior cross bite?

Lower incline bite plane

Orthognatic surgery

Fixed appliance

Functional appliance

6. If there is a lot of root resorption we should do?

Stop activating appliance for at least 6 to 8 weeks and use a lighter force to move the teeth

Use more forcr to move teeth.

Continue to apply heavy force

Give some medicine

7. Which kind of treatment to correct skeletal feature of Class III in growth patients?

Removable appliance

Fixed appliance

Functional appliance

Orthognatic surgery

8. The clinical dental feature of Class III : ?

Narrow upper arch with crowded

Over jet increase

Posterior cross bite

Bimaxillary protrusion

9. Clinical feature of anterior open Bite: ?

Long face

Lips competent

Deep bite

Cross bite

10. In the following answers, which one is the best method to create space:?

Extraction

Distalize-molars

Use coil spring to open space

Proclined teeth

11. When mesio-buccal cusp of upper first permanent molar occluding forward of the buccal groove of the lower first permanent molar is call?

Class I molar relationship

Class II molar relationship

Class III molar relationship

Class I skeletal pattern

12. Lips incompetent most seen in cases?

Cross bite

Long upper lips

Retroclined front teeth

Class II division 1malocclusion

13. Adam Clasps ភាគច្រើនគេដាក់នៅលើធ្មេញណាមួយ?

Strong and healthy teeth

Big and painful teeth

Deep caries teeth

Periodontitis teeth

14. RME បង្វិលប៉ុន្មានដងក្នុង១ថ្ងៃ?

1 time

2 times

3 times

4 times

15. Which size of the wireusing to make Adam clasp?

0.5mm

0.7 mm

0.9 mm

0.12mm

16. Choose the correct components for reduce overjet when the upper front teeth proclined and spacing?

Z- spring

Robert retractor

Bucal canin retractor

Finger spring

17. Which is the possible components for correcting posterior cross bite ?

Z spring

Labial bow

Coffin spring

Buccal canine retractor

18. តើចំលើយមួយណាសំរាបើ Expansion arch?

Robert retractor

Labial bow

Adam clasp

Screw expansion

19. Which Appliances can corrected anterior cross bite?

Retainer

Removable appliance with Z or T spring

Functional appliance

Removable appliance with finger spring

20. Which one is passive Component:?

T-spring

Z- spring

South end clasp

Labial bow

21. Which Active Component can be used as retention:?

T-spring

Z- spring

Robert retractor

Labial bow

22. តើលួសសំរាប់ធ្វើ Z-spring មានទំហ៊ំប៉ុន្មាន?

0.7mm

0.4mm

0.5mm

0.6mm

23. Which one is the best components for correct # 11 cross bite?

Palatal Z spring or T spring

Posterior bite plane

Anterior bite plane

Robert retractor

24. Cross bite should be corrected immediately because it can cause:?

Asymmetrical development of the jaw

Crowding

Spacing

Root resorption

25. Which one is the cause of Anterior cross bite:?

retained lower deciduous incisors

premature contact/ pseudo class III

Small lower arch and very broad Upper arch

Missing lower teeth

26. Which one is the Clinical feature of Anterior cross bite: ?

Reverse overjet

Over jet > 7mm

Small lower arch and very broad Upper arch

Proclined upper incisors

27. Which optimal force for tipping?

35-60g

70-120

50-100g

10-20g

28. Which optimal force for bodily movement?

35-60g

70-120

50-100g

10-20g

29. Which optimal force for intrusion?

35-60g

70-120

50-100g

10-20g

30. Which force is the optimal force for extrusion?

35-60g

70-120

50-100g

10-20g

31. Which force is the optimal force for up righting?

35-60g

70-120

50-100g

10-20g

32. Which force is the optimal force for rotation?

35-60g

70-120

50-100g

10-20g

33. The clinical feature of Class II division 1?

Proclined upper incisors

Overjet reduce

ANB < 4degree

Anterior Crossbite

34. Clinical feature of Class II division 2?

Retroclined upper central Incisors with OJ reduce

Overjet reverse

OJ increase with proclined upper incisors

Proclined upper incisors

35. In class II division 2 malocclusion FMPA angle may be?

Increase

Reduce

Medium

Normal

36. When the OB is very deep what can we call?

Traumatic bite

Increased deep bite

Excessive overbite

open

37. What is the Keys of angle’s classification?

1st permanent molar (Molars relationship)

Incisors relationship

Canine relation ship

Class I canine relationship

38. For reduction of deep bite is done by?

Posterior bite plane

Anterior bite plane or reverse curve of spee

Both anterior & posterior bite plane

Labial bow with springs

39. In case of open bite case FMPA may be?

Increase

Low

Normal

Decrease

40. When the maxillary teeth placed cover one side out and one side in of mandibular teeth called?

Unilateral cross bite

Scissors bite

Bilateral cross bite

Anterior cross bite

41. In case of class III malocclusion, the upper incisors are?

Cross bite

Retroclined

OJ increase

OB deep

42. In case of class II division 1 malocclusion lips are?

Incompetent lips

Competent

Potentially competent

Everted lips

43. Which Occlusal features are true in case of class II division 1 malocclusion?

Overjet & overbite increased with open bite

Overjet increased, overbite incomplete, unilateral crossbite

Overjet increased but overbite reduced

Over bite & over jet is zero

44. Main objective of class II division 1 treatment is ?

The alignment & retraction of lower labial segment

Both arch alignment

Alignment & retraction of upper labial segment

Extraction of upper 4 to improve the aesthetics & the function of the teeth & jaws

45. What is the Malocclusion means?

Normal alignment of teeth

Irregularities of teeth

aligned teeth

good digitation

46. Which on the Main causes of malocclusion?

Abnormal of bone

Abnormal lips

Abnormal of tongue

Abnormal of teeth

47. In case of class I malocclusion FMPA may be?

High

Low

Normal

Increased

48. Which is the upper incisors of class III malocclusion,?

Proclined with OJ increase

Retroclined and cross bite

Proclined with average OJ

Retroclined with OJ increase

49. Which are the clinical features in class II division 1 malocclusion?

FMPA increased with open bite

Overjet increased with upper front teeth proclined

Overbite increased but over jet reduced

Incomplete over bite & over jet decrease

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