Class II Division 1 Malocclusions Flashcards
What does BSI mean in orthodontics?
BSI is British Standard Incisor Classification
what is the BSI for a class 2 div 1 malocclusion?
- Lower incisor edge lies POSTERIOR to cingulum plateau of upper incisors
- INCREASED OVERJET
- Upper central incisors are proclined OR avg inclination
why would you want to treat a patient with class 2 div 1 malocclusion?
Aesthetic concerns
Dental health concerns:
- incompetent lips
- large overjet
what skeletal pattern (AP) is a class II div 1 malocclusion usually associated with?
Class II skeletal, however not fixed to
usually retrognathic mandible
what can an overjet be as a result of?
skeletal pattern
tooth inclination
Combination of both
what is the LAFH/TAFH normal value in lateral ceph?
~55%
why do patients have incompetent lips?
due to prominence of incisors and/or underlying skeletal pattern
why are competent lips important?
important that patients achieve an oral seal
what are some occlusal features of a digit sucking habit?
- proclination of upper anteriors
- retroclination of lower anteriors
- anterior open bite
- narrow upper arch
what are the management options of a patient with class II div 1 malocclusion?
- accept
- attempt growth modification
- simple tipping of teeth
- camouflage
- orthognathic surgery
what growth modification tx can be provided to a patient with class II div 1 malocclusion?
Headgear - retrain maxilla growth so mandible grows more
Functional appliance (twin-block)
when should a functional appliance be used in a pt?
during their period of growth spurt
what appliance can be used for simple tipping of teeth?
upper removable appliance
what is the active component in a URA to retrocline anterior teeth?
roberts retractor 0.5mm HSSW in ID TUBING
what is meant by orthodontic camoflague when there is an increased OJ?
upper arch extractions (usually 4’s) to create space for OJ reduction
