MCQs in Orthodontics

Chapter 5: Treatment of Orthodontic problems in preadolescent children

 

1- In examining a child patient normal gingiva is diagnosed on the basis of all the following EXCEPT:

 

  1. Contour
  2. Stippling
  3. Sulcus depth
  4. Depth of vestibule

 

 

 

 

 

The answer is: D

 

2- Primary second molar usually erupt:

 

  1. 8-14 months
  2. 14-20 months
  3. 20-30 months
  4. 30-36 months

 

 

 

 

 

The answer is: C

 

3- Coffin spring is used for:

 

  1. Expand the dental arches
  2. Move canine distally
  3. Move canine palatally
  4. Retraction of protrusion

 

 

 

 

 

The answer is: A

 

4- At what age should a child be referred for an orthodontic examination:

 

  1. Three years
  2. Six years
  3. Seven years
  4. Fourteen years

 

 

 

 

 

 

The answer is: C

 

5- At what age child is expected to have 12 erupted primary and 12 erupted permanent teeth:

 

  1. 5 years
  2. 5 years
  3. 5 years
  4. 5 years

 

 

 

 

 

The answer is: C

 

6- A 10 year old child is being assessed for orthodontic treatmet, which of the following is not an essential diagnostic Aid:

 

  1. OPG Radiograph
  2. Extra Oral Radiographs
  3. Study Models
  4. MRI scan

 

 

 

 

 

The answer is: D

 

7- There are advantages of treating patients at an early age, the reason for this is:

 

  1. There is scope for growth modification
  2. There is scope for prevention and interception
  3. The is scope for utilization of natural growth forces
  4. All of the above

 

 

 

 

 

 

The answer is: D

 

8- A removable appliance should not be used for which of the following:

 

  1. Rotation of a tooth
  2. Correction of overbite reduction
  3. An uncooperative patient who will not wear the appliance.
  4. Retroclining anterior teeth

 

 

 

 

 

 

The answer is: C

 

9- The function(s) of retentive component of a removable orthodontic appliance are:

 

  1. Joining various parts of a removable orthodontic appliance together
  2. Exerting force on teeth that need to be corrected
  3. Keeping the appliance in place a resisting displacement of the appliance
  4. All of the above

 

 

 

 

 

The answer is: C

 

10- Which of the following is/are a retentive component(s) of a removable orthodontic appliance:

 

  1. Labial Bow
  2. Elastics
  3. Adam’s clasp
  4. All of the above

 

 

 

 

 

 

The answer is: C

 

11- Circumferential clasps engage:

 

  1. Buccal/lingual cervical undercuts
  2. Mesial and distal proximal undercuts
  3. Both of the above
  4. None of the above

 

 

 

 

 

 

The answer is: A

 

12- Adams clasps engage which of the following:

 

  1. Buccal/lingual cervical undercuts
  2. Mesial and distal proximal undercuts
  3. Both of the above
  4. None of the above

 

 

 

 

 

The answer is: B

 

13- A radiograph of a 4 year old patient shows no evidence of calcification of mandibular second premolars, this suggests that:

 

  1. These teeth may develop later on.
  2. Second premolars will probably never develop
  3. Deciduous second molars should be extracted to allow the permenant first molars to drift forward
  4. It is too early to tell

 

 

 

 

 

 

The answer is: A

 

14- Thumb sucking in children aged 4 years plus can result in:

 

  1. open bite
  2. retruded mandible
  3. Protrusion of maxillary teeth
  4. All of the above

 

 

 

 

 

 

The answer is: D

 

15- The prevelance of cleft lip and palate is about:

 

  1. 1 in every 2000 to 4000 births
  2. 1 in every 100 to 150 births
  3. 1 in every 600 to 1000 births
  4. 1 in every 10000 births

 

 

 

 

 

 

The answer is: C

 

16- Cleft lip and palate  can occur due to:

 

  1. Excessive tongue resistance
  2. Non fusion of shelves
  3. Interuption with the intrinsic shelf force
  4. All of the above

 

 

 

 

 

 

The answer is: D

 

17- which of the following statements is true regarding the incidence rates of cleft lip with cleft palate between females and males:

 

  1. More common in females than males
  2. It is more common in males than females
  3. Equal incidence
  4. The incidence varies yearly

 

 

 

 

 

The answer is: B

 

18- Amongst the following, which is the most common type of congenital deformity seen at birth:

 

  1. Amelogenesis Imperfecta
  2. Dentinogenesis Imperfecta
  3. Cleft lip and palate
  4. Osteogenesis imperfecta

 

 

 

 

 

The answer is: C