POSTGRADUATE ORTHODONTIC MCQ

1) A severe malocclusion may compromise which of the following aspect of oral function
a) mastication.
b) swallowing.
c) speech.
d) all of the above.

2) Class I malocclusion share what basic characteristic
a) the midface is concave.
b) a harmonious skeletal profile.
c) the midface in convex.
d) all of the above.

3) Class II malocclusion is also refer to as
a) retrognathism or overbite.
b) proganthism or underbitre.
c) all of the above.
d) non of the above.

4) Which of the cusp listed below of the maxillary 1ST permanent molar serve as a reference point in identifying Angle's calss I , II ,III occlusions
a) distobuccal.
b) mesiobuccal.
c) distolinual.
d) mesiolingual.

5) The existence of forward shift of mandible during closure is founf in
a) true calss III malocclusion.
b) pseudo class III malocclusion.
c) all of the above.
d) non of the above.

6) malocclusion is most often
a) acquired from a friend.
b) hereditary.
c) caused by antibiotic.
d) caused by bad habits.

7) Which of the following is common characteristic feature of calss II division II malocclusion
a) the maxillary centrals are near normal anterioposterior or slightly linguoversion.
b) the maxillary lateral incisor are usually labiomesially flared and overlap the central incisors.
c) impinging overbite.
d) all of the above.

8) An most class II division II malocclusion , the body of the mandible and its superimposed dental arch are in a
a) mesial relationships to the maxillary incisors are usually in a labial axial inclination.
b) distal relationships to the maxillary incisors are usually in a labial axial inclination.
c) mesial relationships to the maxillary incisors are usually in a lingual axial inclination.
d) distal relationships to the maxillary incisors are usually in a lingual axial inclination.

9) Which of the following profiles is usually accompanied by a class II malocclusion
a) a retrognathic profile.
b) prognathic profile.
c) orthognathic profile.
d) non of the above.

10) A 13 year –old patient has all teeth present and normal occlusion ; molar root apexes are not totally closed . the mandibular left 1st molar has beeb extracted . the ideal time of treatment at this time is what ?
a) place a fixed bridge.
b) place a space maintainer.
c) place a removable partial denture.
d) do nothing and observe.
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