Class II Division 2 Malocclusions Flashcards
what is the BSI definition of class II div 2 malocclusion?
Lower incisor occludes POSTERIOR to cingulum plateau of upper incisor
Upper incisors are retroclines
Overjet is reduced but can also be increased
what is the usual skeletal pattern (AP) of a pt with Class II div 2?
usually sk base 2, sometimes a base 1 or 3
what is the vertical skeletal pattern of a pt with Class II div 2?
Typically REDUCED
(reduced FMPA)
what are the soft tissue features of a pt with Class II div 2?
high resting lower lip line (retroclines upper incisors)
Reduced lower face height
what are the main dental features of a pt with Class II div 2?
retroclinication of upper centrals
crowding of upper 2s
reduced arch length
increased overbite
lower incisors may occlude with palatal mucosa IF overbite is severe
why would you treat a Class II div 2 patient?
aesthetic concerns
Dental health concerns:
- traumatic overbite
when would you accept a Class II div 2 on a patient?
if patient not concerned
acceptable aesthetics
overbite not a significant problem/not traumatic
when would growth modification be appropriate for a pt with Class II div 2 and what would you do?
adolescent growth spurt
convert Class II div 2 into div 1
and modify their skeletal pattern
what would functional appliances do for Class II div 2?
procline upper incisors, encourage mandible to catchup growing to maxilla
what would orthodontic camouflage include for a pt with Class II div 2?
- accept skeletal base relationship
- achieve class 1 incisor relationship
- careful xla decision
when would orthognathic surgery be appropriate for a pt with Class II div 2?
- too severe malocclusion for ortho alone, AP & VERTICAL relationship
- pt completed growth
- facial profile concerns
when should you refer a pt with Class II div 2?
if AP concern, growth modification with functional appliances
URA for OVERBITES
Orthognathic/orthodontics IF significant skeletal discrepancy after complete growth
