Orthodontics #4 – Unidontia

1. Dolicocephalic face shows which of the following?

Short and narrow arches

Short and wide arches

Narrow and long arches

Narrow and wide arches

Question 1 of 20

2. Bed of orthodontic tooth movement is

Osteoblasts and osteoclasts

Alveolar process

Gingiva

Periodontium

Question 2 of 20

3. Frankel-II is used for:

Class-II division-1 malocclusion with overjet < 5 mm

Class-II division-1 malocclusion with overjet > 7 mm

Class-II division-2 malocclusion

Class-I deep bite

Question 3 of 20

4. The flat bones of the skull and part of the clavicle are formed by:

Epiphyseal formation

Erythropoiesis

lntramembranous ossification

Endochondral ossification

Question 4 of 20

5. Arrowhead clasp is also called:

Schwarz

Multiple

Crozat

Adams clasp

Question 5 of 20

6. Most favorable for reinforcement of anchorage is:

Tooth out of occlusion

Conical roots

Tooth with intact proximal contacts

Shifting centre of resistance apically

Question 6 of 20

7. Which of these is not an absolute indication to mount orthodontic study models on articulator:

To see and correct Cr-Co discrepancy

Class II case with severe overjet of 14 mm

To record the excursive movements of mandible

Surgical planning

Question 7 of 20

8. Orthodontic tooth movement in a patient with concussion, subluxation extrusion and simple crown/root fracture should be postponed by:

3 months

1 year

6 months

15 days

Question 8 of 20

9. Serial extraction procedures involve:

Orderly sequential removal of selected primary teeth only

Orderly removal of selected primary and permanent teeth in a predetermined sequence

Orderly and sequential removal of selected permanent teeth only

Orderly removal of selected primary and permanent teeth in a single sitting

Question 9 of 20

10. Appearance of ulnar sesamoid bones in hand occurs:

At onset of pubertal growth spurt

At the end of pubertal spurt

At the prepubertal spurt

Birth

Question 10 of 20

11. Superimposition in cephalometric studies is done from Registration point. This demonstrates best:

All of the above

Growth of structures farthest from that point

Growth of structures nearest from that point

Growth of structures at that point

Question 11 of 20

12. Function of chin cup is:

Correction of horizontal growth pattern

Correction of developing Class 3 malocclusion

Incisor retraction in fixed rnechanotherapy

Correction of developing Class 2 malocclusion

Question 12 of 20

13. Maxillary arch increases in length by:

Growth at the sphenozygomatic suture

Development of Palate

Deposition of bone at Tuberosity

Development of alveolar process

Question 13 of 20

14. Moyers D type CLASS II malocclusion is

Prognathic Maxilla / Retrognathic Mandible

Orthognathic Maxilla / Retrognathic Mandible

Retrognathic Maxilla / Retrognathic Mandible

Orthognathic Maxilla / Orthognathic Mandible

Question 14 of 20

15. The total eruption path of a first permanent molar is about

2.5 cm

1.5 cm

2 cm

3 cm

Question 15 of 20

16. COGS analysis was given by:

Burstone and Legan

Burstone and Levine

Burstone and Merill

Burstone and Nanda

Question 16 of 20

17. Prior to direct bonding, __________ is used as an etching agent. Prior to placing bands, _______________is used as an etching agent.

35-50% unbuffered phosphoric acid; nothing

nothing; 10-15% unbuffered phosphoric acid

nothing; 35-50% unbuffered phosphoric acid

10-15% unbuffered phosphoric acid; nothing

Question 17 of 20

18. Which of the following cements provides maximum resistance to enamel decalcification, when used with molar bands:

Zinc polycarboxyate

GIC

Zinc phosphate

Silicate

Question 18 of 20

19. Spheno-occipital synchondroses fuses by what age:

9 years

3 years

13 years

16 years

Question 19 of 20

20. The approximate time in the normal variation of eruption of the permanent teeth is

3-4 years

1-2 years

2-3 years

2-4 years

Question 20 of 20