Orthodontics Revision #3

1. The most appropriate time for surgical treatment of a patient with mandibular prognathism is

following the completion of growth.

just after the end of the prepubertal growth spurt.

just before eruption of the second permanent molars.

just after eruption of the second permanent molars.

Question 1 of 20

2. In Dewers method of serial extraction procedure, the second step involved is to

Extract deciduous canine only

Extract first premolar

Extract both deciduous canine and first deciduous molar

Extract first deciduous molar only

Question 2 of 20

3. According to American Board of Orthodontics recommendation for colour coding of sequential tracing, end treatment ceph tracing is done in:

Red

Green

Black

Blue

Question 3 of 20

4. Adam's clasp adjustment is done by:

Bending the clasp gingivally at the point at which it inserts into the plate

Compressing the vertical loops of the arrow heads towards each other

Bending the bridge gingivally

Giving a v-shaped indent on the bridge of the clasp

Question 4 of 20

5. Which of the following soft tissue of oro-facial region mature first:

Lip

All soft tissue mature simultaneously

Posterior 1/3 of tongue

Tip of tongue

Question 5 of 20

6. If the centre of rotation is at the apex of the root, then the orthodontic movement which results is:

Translation

Torquing

Controlled tipping

Uncontrolled tipping

Question 6 of 20

7. Maximum Lip thickness is seen at what age in males:

21 years

10 years

18 years

16 years

Question 7 of 20

8. Primate space in mandibular arch is present between:

Canine and primary first molar

1' and 2" primary molars

Canine and premolar

Lateral incisor and canine

Question 8 of 20

9. Down syndrome patient shows

Retruded mandible

Protruded mandible

Both of the above

Midface retrusion

Question 9 of 20

10. Dolicocephalic face shows which of the following?

Short and narrow arches

Narrow and long arches

Narrow and wide arches

Short and wide arches

Question 10 of 20

11. The ratio of skeletal: Dental expansion obtained finally after Rapid palatal expansion is

4;1

1;1

3;1

2;1

Question 11 of 20

12. In an infant, the gum pad is separated from palate by:

Gingival groove

Dental groove

Lateral sulcus

Transverse groove

Question 12 of 20

13. The term applied when it is doubtful, according to mixed dentition analysis whether there will be space for all the teeth

Space regaining

None of the above

Space maintenance

Space supervision

Question 13 of 20

14. A graphical form, which compares different wire material and sizes is knows as

Isogram

Stress-strain curve

Phase diagram

Normogram

Question 14 of 20

15. Pitch of the hyrax screw is?

0.5 mm

0.25 mm

0.8 mm

1.2 mm

Question 15 of 20

16. Which condition is appropriately treated at an early age?

Two deciduous molars nearly in crossbite

Posterior crossbite with a functional shift

Deviated midline in the absence of a functional shift

Mild crowding of lower permanent incisors

Question 16 of 20

17. Which analysis uses the measurement of lower incisors to calculate dimensions of posterior teeth:

Moyers analysis

Bolton's analysis

Huckaba analysis

Nance analysis

Question 17 of 20

18. Arrowhead clasp is also called:

Multiple

Adams clasp

Crozat

Schwarz

Question 18 of 20

19. Alveolar bone is undergoing remodelling

until the end of mixed dentition.

throughout life.

through the primary dentition.

until the complete eruption of permanent teeth.

Question 19 of 20

20. Thumb sucking is normal upto what age:

5 yrs

4 yrs

2 yrs

1 yr

Question 20 of 20