Mandibular border movements and masticatory patterns before and after orthognathic surgery.
To study the effects of combined surgical-orthodontic treatment, recordings of functional and border movements were obtained before and after surgery for 16 patients with severe skeletal malocclusions. The tracings showed a clear difference in the functional adaptation to mandibular setback and mandibular advancement surgeries. Patients with a skeletal Class III malocclusion who had undergone mandibular setback surgery generally showed an increase in the range of border and masticatory movements postsurgically. Patients with a skeletal Class II malocclusion corrected by mandibular advancement showed a restricted range of motion immediately postoperatively. Even 12 months after surgery, their recordings did not completely approach presurgical values.
Ehmer
U
U
Department of Orthodontics, Westfalische Wilhelms University, Munster, Germany.
Broll
P
P
D000328:Adult; D006801:Humans; D007574:Jaw Relation Record; D008137:Longitudinal Studies; D008310:Malocclusion / Q000503:physiopathology* / Q000601:surgery*; D008312:Malocclusion, Angle Class II / Q000503:physiopathology / Q000601:surgery; D008313:Malocclusion, Angle Class III / Q000503:physiopathology / Q000601:surgery; D008334:Mandible / Q000503:physiopathology* / Q000601:surgery; D008409:Mastication / Q000502:physiology*; D009068:Movement; D016896:Treatment Outcome