The stability of facial advancement surgery (in the management of combined mid and lower dento-facial deficiency).
The short-term (6 weeks postoperative) and long-term (12 months postoperative) skeletal stability of combined maxillary and mandibular advancement was evaluated by cephalometric analysis in 15 patients. The mean horizontal advancement of the maxilla was 5.84 mm. 6 weeks later a mean relapse of 0.03 mm (0.5%) was identified. The mean relapse at long-term follow-up was 0.59 mm (10.1%). The mean horizontal advancement of the mandible was 12.35 mm at menton and 12.65 mm at pogonion. At 6 weeks, mean horizontal relapse, respectively at the above landmarks, was 0.11 mm and 0.21 mm (1.3%). The mean relapse at long-term follow-up was respectively 2.19 mm and 1.98 mm (16.9%). Subjectively and objectively improvements were seen in facial aesthetics and dental occlusion. The results indicated that rigid fixation of osteotomies undertaken to correct 'horizontal facial deficiency' is a surgically predictable and relatively stable procedure when reviewed up to 12 months after surgery.
Department of Maxillofacial Surgery, Princess Alexandra Hospital, Brisbane, Queensland, Australia.
G R
GR
Hoffman
F B
FB
Moloney
D J
DJ
Effeney
D000293:Adolescent; D000328:Adult; D002508:Cephalometry; D002680:Chin / Q000601:surgery; D004954:Esthetics; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000601:surgery* / Q000628:therapy; D008334:Mandible / Q000473:pathology / Q000601:surgery*; D008437:Maxilla / Q000473:pathology / Q000601:surgery*; D009666:Nose / Q000473:pathology; D009971:Orthodontics, Corrective; D010027:Osteotomy / Q000379:methods*; D012008:Recurrence; D012690:Serial Extraction