NBDE 2 - Ortho/Occlusion UPDATED
ACTUAL Exam Questions and CORRECT
Answers
BSSO = bilateral sagital split osteotomy - CORRECT ANSWER - most commonly used
surgery for mandibular augmentation OR retraction
BSSO - CORRECT ANSWER - surgery to repair class II malocclusion
damage to IAN --> parasthesia lip/ tongue - CORRECT ANSWER - disadvantage of
BSSO
lefort I with BSSO - CORRECT ANSWER - fix class III on 16 y.o.; what procedures to
perform?
splint 4-6 weeks - CORRECT ANSWER - how long to splint mandibular BSSO?
*lefort I* - CORRECT ANSWER - most common surgery for maxilla?
lefort I - CORRECT ANSWER - pt has vertical maxillary excess; how to fix?
neurosensory disturbances - CORRECT ANSWER - most common post-op prob
associated with BSSO?
surgical repositioning of maxilla (lefort I with BSSO) - CORRECT ANSWER - class III
malocclusion due to maxillary deficiency. what is tx of choice?
for bigger stable mvts b/c muscles can react over time
,simultaneously *increases bone length* and *volume of surrounding soft tissues* but has a long
term followup and requires compliance - CORRECT ANSWER - when to use *distraction
osseogenesis* over traditional osteosergery?
long narrow face - CORRECT ANSWER - dolycocephalic
BOTH *intramembranous* and *endocondral* - CORRECT ANSWER - growth of
*mandible* is ________
*5* - CORRECT ANSWER - Scammon Growth curve: *neural tissue* grows until age
___ ?
*neural* - CORRECT ANSWER - which tissues shows most growth in 1st 6 years and
then plateaus?
( neural / lymph / genital )
neural system - CORRECT ANSWER - which is most fully developed at birth?
( muscle / neural / gonadal system )
*maxilla* since its closer to brain - CORRECT ANSWER - which grows faster: maxilla or
mandible?
wrist hand radiograph - CORRECT ANSWER - what is the best revealing tissue for
prediction about ossification?
*ectoderm* - CORRECT ANSWER - majority of tissues in face are derived from ?
ABDCE
centrals, laterals, 1st molars, canines, 2nd molars - CORRECT ANSWER - eruption
sequence of primary teeth
, *sagittal* (anterior-posterior) - CORRECT ANSWER - *curve of spee*
*frontal* (left to right) - CORRECT ANSWER - *curve of wilson*
2-3 mm - CORRECT ANSWER - overjet in perm teeth should be...
extract upper PM - CORRECT ANSWER - how do you camouflage class II?
child has positive rapport with dentist - CORRECT ANSWER - Frankl score of 4 means
most appropriate - CORRECT ANSWER - Tell-show-do
Very Stable - Max up, Mand forward, Chin in any direction
Stable - Max forward, Max asymmetry
Stable: Right fix only - Max up + Mand forward, Max forward + Mand back, Mand asymmetry
Problematic - Mand back, Max down, Max wider - CORRECT ANSWER - Surgical-Ortho
Tx: Hierarchy of Stability
*convex* - CORRECT ANSWER - facial profile of *class 2 malocclusion*
*concave* - CORRECT ANSWER - facial profile of *class 3 malocclusion*
*class I* - CORRECT ANSWER - MB cusp of max 1st M is in buccal-lingual groove of
mand 1st M
*class III* - CORRECT ANSWER - MB cusp of max 1st M is *distal* to buccal groove of
mand 1st M
ACTUAL Exam Questions and CORRECT
Answers
BSSO = bilateral sagital split osteotomy - CORRECT ANSWER - most commonly used
surgery for mandibular augmentation OR retraction
BSSO - CORRECT ANSWER - surgery to repair class II malocclusion
damage to IAN --> parasthesia lip/ tongue - CORRECT ANSWER - disadvantage of
BSSO
lefort I with BSSO - CORRECT ANSWER - fix class III on 16 y.o.; what procedures to
perform?
splint 4-6 weeks - CORRECT ANSWER - how long to splint mandibular BSSO?
*lefort I* - CORRECT ANSWER - most common surgery for maxilla?
lefort I - CORRECT ANSWER - pt has vertical maxillary excess; how to fix?
neurosensory disturbances - CORRECT ANSWER - most common post-op prob
associated with BSSO?
surgical repositioning of maxilla (lefort I with BSSO) - CORRECT ANSWER - class III
malocclusion due to maxillary deficiency. what is tx of choice?
for bigger stable mvts b/c muscles can react over time
,simultaneously *increases bone length* and *volume of surrounding soft tissues* but has a long
term followup and requires compliance - CORRECT ANSWER - when to use *distraction
osseogenesis* over traditional osteosergery?
long narrow face - CORRECT ANSWER - dolycocephalic
BOTH *intramembranous* and *endocondral* - CORRECT ANSWER - growth of
*mandible* is ________
*5* - CORRECT ANSWER - Scammon Growth curve: *neural tissue* grows until age
___ ?
*neural* - CORRECT ANSWER - which tissues shows most growth in 1st 6 years and
then plateaus?
( neural / lymph / genital )
neural system - CORRECT ANSWER - which is most fully developed at birth?
( muscle / neural / gonadal system )
*maxilla* since its closer to brain - CORRECT ANSWER - which grows faster: maxilla or
mandible?
wrist hand radiograph - CORRECT ANSWER - what is the best revealing tissue for
prediction about ossification?
*ectoderm* - CORRECT ANSWER - majority of tissues in face are derived from ?
ABDCE
centrals, laterals, 1st molars, canines, 2nd molars - CORRECT ANSWER - eruption
sequence of primary teeth
, *sagittal* (anterior-posterior) - CORRECT ANSWER - *curve of spee*
*frontal* (left to right) - CORRECT ANSWER - *curve of wilson*
2-3 mm - CORRECT ANSWER - overjet in perm teeth should be...
extract upper PM - CORRECT ANSWER - how do you camouflage class II?
child has positive rapport with dentist - CORRECT ANSWER - Frankl score of 4 means
most appropriate - CORRECT ANSWER - Tell-show-do
Very Stable - Max up, Mand forward, Chin in any direction
Stable - Max forward, Max asymmetry
Stable: Right fix only - Max up + Mand forward, Max forward + Mand back, Mand asymmetry
Problematic - Mand back, Max down, Max wider - CORRECT ANSWER - Surgical-Ortho
Tx: Hierarchy of Stability
*convex* - CORRECT ANSWER - facial profile of *class 2 malocclusion*
*concave* - CORRECT ANSWER - facial profile of *class 3 malocclusion*
*class I* - CORRECT ANSWER - MB cusp of max 1st M is in buccal-lingual groove of
mand 1st M
*class III* - CORRECT ANSWER - MB cusp of max 1st M is *distal* to buccal groove of
mand 1st M
