MCQ on classification of malocclusion in orthodontics
1. In Angle's Classification for malocclusion, key tooth is
a) MB cusp of permanent Max. 1st molar
b) DB cusp of permanent Max. 1st molar
c) MB cusp of permanent Max. 2nd molar
d) Mb cups of permanent Mand. 1st molar
2. Zygoma (or) Key ridge corresponds to
A) Mesiobuccal root of upper 1st molar
B) Mesiobuccal root of upper 2nd molar
C) Distobuccal cusp of 2nd molar
D) Distobuccal cusp of upper 1st molar
3. The following features are noted in a patient. The mesiabuccal cusp of right upper first molar is aligning in the mesiobuccal groove of right lower first molar. The distobuccal cusp of left upper first molar is aligning in the mesiobuccal groove of left lower first molar. The upper Incisors are retroclined. You would like to Classify It as:
a) Angle's Class I div I subdivision
b) Angle's Class II dlv I subdivision
c Angle's Class II div II subdivision
d) Angle's Class III div I subdivision
4. A patient is having edge to edge or end on relation of first molar in permanent dentition with retroclination of incisors. The malocclusion according to Angles Classification is
a) Class 1
b) Class II Div I
c) Class II Div II
d) Class III
5. Anterior crossbites according to Dewey are Classified in Angle's Class I as
a) Type 1
b) Type II
c) Type III
d) Type IV
6. Anterior crossbites according to Dewey are Classified Angle's Class III as
a) Type 1
b) Type II
d) There is no modification of Angle Class III
c) Type III
7. Who has Classified malocclusion based on aetiology
a) Angle
b) Lischer
c) Benett
d) Dewey
8. Transposition of teeth refers to
a) Buccorotation of 120 degrees
b) Hypodontla
c) Teeth erupted in unusual position
d) Inverted supernumerary teeth
9. Transposition of teeth is most commonly seen in the region of
a) Maxillary central and lateral incisors
b) Mandibular canine and first premolar
c) Maxillary lateral incisor, canine and premolar
d) Mandibular first and second premolars
10. The term torsiversion refers to the
a) impaction of maxillary canines
b) interchange of position of teeth
c) rotation of teeth in their long axis
d) none of the above
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