Malocclusion issues Flashcards
What is an Anterior Open Bite (AOB)?
Condition where there is no contact and no vertical overlap of the lower incisor crowns by the upper incisor crowns when mandible is in full occlusion
What can cause an AOB?
Habits Abnormal tongue function Trauma/pathology affecting condyle Muscular dystrophy Pathological - cleft lip/palate
Treatment of a skeletal open bite?
Combined orthodontic/surgical approach
TADs to intrude buccal segments
Extract distally, do not distalise molars
Treatment of a dental open bite?
Stop rabbit
High pull headgear and transpalatal arch
Fixed appliance and vertical anterior elastics
TAD’s
What is the definition of a deep bite?
Increased overlap, beyond average (2-4mm) of the upper incisors with the lower incisors
complete to tooth/soft tissue or incomplete
What are the causes of a deep bite?
Anterior growth rotation due to lower anterior face height or upper posterior face height
excessive eruption of incisors especially lower incisors
Retroclination by muscle activity
How can a deep bite be treated?
URA with anterior bite plane in growing patients Fixed appliances incorporating 7's Tip Edge Class II elastics TAD's Low pull headgear Orthognathic surgery