NBDE Orthodontics UPDATED ACTUAL
Exam Questions and CORRECT Answers
dolycocephalic - CORRECT ANSWER - long narrow face
scammon growth curve - CORRECT ANSWER - age 5 (6-7)
tissue with most growth till age 6, then plateaus - CORRECT ANSWER - neural
tissues in face derived from .... - CORRECT ANSWER - ectoderm
how to camouflage class 2 - CORRECT ANSWER - extract upper premolar
curve of spee vs curve of wilson - CORRECT ANSWER - spee= sagital, wilson= frontal
overjet in permanent teeth sholhd be - CORRECT ANSWER - 2-3mm
frank behavior rating scale- positive rapport with dentist - CORRECT ANSWER - rating 4
diff btw primary and permanent class II - CORRECT ANSWER - broad contacts
most stable movements of jaws - CORRECT ANSWER - stable- maxilla up, mand
forward, chin any direction
most common occlusion in primary teeth - CORRECT ANSWER - flush plane
which class is prone to trauma of ant teeth? - CORRECT ANSWER - class II, div I
, % of population with class I occlusion - CORRECT ANSWER - 30%
permanent molar occlusion in the presence of a flush (straight) terminal plane and mandibular
primate spaces - CORRECT ANSWER - erupts end to end, early mesial shift into class I
occlusion
primate spaces - CORRECT ANSWER - max- btw lateral and canine
mand- btw canine and 1st molar
head gear to correct class III - CORRECT ANSWER - reverse pull
premature loss of this tooth, leading to arch length deficiency - CORRECT ANSWER -
primary canine
compared in the transitional dentition analysis - CORRECT ANSWER - space available to
space required
Moyers' mixed dentition analysis - CORRECT ANSWER - sum of all 4 mand incisors
(tanaka- 1/2 sum of 4 mand incisors)
late mesial shift of a permanent first molar is primarily the result of closure of which space -
CORRECT ANSWER - leeway
ugly duckling stage - CORRECT ANSWER - max centrals with diastema
mouth breathing - CORRECT ANSWER - skeletal open bite
3mm maxillary constriction - CORRECT ANSWER - bilateral crossbite
Exam Questions and CORRECT Answers
dolycocephalic - CORRECT ANSWER - long narrow face
scammon growth curve - CORRECT ANSWER - age 5 (6-7)
tissue with most growth till age 6, then plateaus - CORRECT ANSWER - neural
tissues in face derived from .... - CORRECT ANSWER - ectoderm
how to camouflage class 2 - CORRECT ANSWER - extract upper premolar
curve of spee vs curve of wilson - CORRECT ANSWER - spee= sagital, wilson= frontal
overjet in permanent teeth sholhd be - CORRECT ANSWER - 2-3mm
frank behavior rating scale- positive rapport with dentist - CORRECT ANSWER - rating 4
diff btw primary and permanent class II - CORRECT ANSWER - broad contacts
most stable movements of jaws - CORRECT ANSWER - stable- maxilla up, mand
forward, chin any direction
most common occlusion in primary teeth - CORRECT ANSWER - flush plane
which class is prone to trauma of ant teeth? - CORRECT ANSWER - class II, div I
, % of population with class I occlusion - CORRECT ANSWER - 30%
permanent molar occlusion in the presence of a flush (straight) terminal plane and mandibular
primate spaces - CORRECT ANSWER - erupts end to end, early mesial shift into class I
occlusion
primate spaces - CORRECT ANSWER - max- btw lateral and canine
mand- btw canine and 1st molar
head gear to correct class III - CORRECT ANSWER - reverse pull
premature loss of this tooth, leading to arch length deficiency - CORRECT ANSWER -
primary canine
compared in the transitional dentition analysis - CORRECT ANSWER - space available to
space required
Moyers' mixed dentition analysis - CORRECT ANSWER - sum of all 4 mand incisors
(tanaka- 1/2 sum of 4 mand incisors)
late mesial shift of a permanent first molar is primarily the result of closure of which space -
CORRECT ANSWER - leeway
ugly duckling stage - CORRECT ANSWER - max centrals with diastema
mouth breathing - CORRECT ANSWER - skeletal open bite
3mm maxillary constriction - CORRECT ANSWER - bilateral crossbite
