The stability of facial osteotomies. Part 5. Maxillary advancement with miniplate and screw fixation.
Surgical repositioning of the dento-skeletal components of the middle-third of the face, combined with appropriate orthodontic treatment, can be used to improve function and aesthetics. However, the attainment of three-dimensional stability following corrective jaw surgery continues to be a major problem in the postsurgical period. This paper examines the short-term (six weeks postoperative) and long-term (12 months postoperative) horizontal skeletal stability of Le Fort I maxillary advancement in 15 patients. The mean horizontal advancement of the maxilla was 8.76 +/- 0.99 mm. Six weeks later, a mean relapse of 0.22 +/- 0.19 mm was identified. The mean relapse at long-term follow-up was 0.61 +/- 0.26 mm (6.96%). These results indicate that rigid miniplate and screw fixation of Le Fort I osteotomy undertaken to correct horizontal mid-dentofacial deficiency is both statistically and surgically predictable and stable when reviewed up to twelve months after surgery.
Hoffman
G R
GR
Department of Maxillofacial Surgery, Princess Alexandra Hospital, Brisbane, Queensland.
Moloney
F B
FB
D000293:Adolescent; D000328:Adult; D001860:Bone Plates; D001863:Bone Screws; D002508:Cephalometry; D015331:Cohort Studies; D004954:Esthetics; D005147:Facial Bones / Q000473:pathology / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008437:Maxilla / Q000473:pathology / Q000601:surgery*; D009971:Orthodontics, Corrective; D010027:Osteotomy / Q000379:methods*; D012008:Recurrence; D014716:Vertical Dimension