NBDE Orthodontics Exam/ Questions &
Answers Latest Update
late mesial shift of a permanent first molar is primarily the result of closure of which
space - CORRECT ANSWERS -leeway
ugly duckling stage - CORRECT ANSWERS -max centrals with diastema
mouth breathing - CORRECT ANSWERS -skeletal open bite
3mm maxillary constriction - CORRECT ANSWERS -bilateral crossbite
max arch constriction of 3mm and posterior crossbite, what will u see? - CORRECT
ANSWERS -midline shift toward affected side
unilateral post crossbite - CORRECT ANSWERS -due to mand shift, treat with max
expansion?
ant crossbite is done by all except - CORRECT ANSWERS -functional shift
appliance for correction of crossbites - CORRECT ANSWERS -hawley appliance
tooth most likely in crossbite - CORRECT ANSWERS -maxillary lateral
leveling occlusal plane - CORRECT ANSWERS -w/ open bite
most common cause of ant crossbite - CORRECT ANSWERS -lack of interdental arch
tooth is the most important to keep for space maintenance - CORRECT ANSWERS -
primary 2nd molar
post emergence eruption - CORRECT ANSWERS -result of root development
tooth erupts into oral cavity - CORRECT ANSWERS -3/4 th root formed (gingivsl)
2/3 (bone)
whites mostly deep bite (2x) - CORRECT ANSWERS -blacks mostly open bite (5x)
Additional space for successive eruption of permanent maxillary molars is provided by -
CORRECT ANSWERS -appositional growth at maxillary tuberosity
space for eruption of second and 3rd mand molars - CORRECT ANSWERS -resorption
at anterior border of ramus
Answers Latest Update
late mesial shift of a permanent first molar is primarily the result of closure of which
space - CORRECT ANSWERS -leeway
ugly duckling stage - CORRECT ANSWERS -max centrals with diastema
mouth breathing - CORRECT ANSWERS -skeletal open bite
3mm maxillary constriction - CORRECT ANSWERS -bilateral crossbite
max arch constriction of 3mm and posterior crossbite, what will u see? - CORRECT
ANSWERS -midline shift toward affected side
unilateral post crossbite - CORRECT ANSWERS -due to mand shift, treat with max
expansion?
ant crossbite is done by all except - CORRECT ANSWERS -functional shift
appliance for correction of crossbites - CORRECT ANSWERS -hawley appliance
tooth most likely in crossbite - CORRECT ANSWERS -maxillary lateral
leveling occlusal plane - CORRECT ANSWERS -w/ open bite
most common cause of ant crossbite - CORRECT ANSWERS -lack of interdental arch
tooth is the most important to keep for space maintenance - CORRECT ANSWERS -
primary 2nd molar
post emergence eruption - CORRECT ANSWERS -result of root development
tooth erupts into oral cavity - CORRECT ANSWERS -3/4 th root formed (gingivsl)
2/3 (bone)
whites mostly deep bite (2x) - CORRECT ANSWERS -blacks mostly open bite (5x)
Additional space for successive eruption of permanent maxillary molars is provided by -
CORRECT ANSWERS -appositional growth at maxillary tuberosity
space for eruption of second and 3rd mand molars - CORRECT ANSWERS -resorption
at anterior border of ramus
