J Korean Assoc Maxillofac Plast Reconstr Surg.  2009 Nov;31(6):485-491.

Post-Operative Skeletal Stability of the Maxilla Treated with Le Fort I and U-Shaped Osteotomies in Simultaneous Maxillomandibular Orthognathic Surgery

• Kim MK
• Park YW

Abstract

Postoperative skeletal stability was evaluated in combination of Le Fort I and U-shaped osteotomies for superior repositioning of maxilla in bi-maxillary surgeries in 30 consecutive patients. The fifteen patients underwent Le Fort I osteotomy alone and the other fifteen patients underwent Le Fort I and U-shaped osteotomies. In all patients, the maxilla was first osteomized and fixed with absorbable plates system. A bilateral sagittal split ramus osteotomy (BSSRO) of the mandible was then carried out and fixation was performed using absorbable plates. Maxillo-mandibular fixation with rubber ring was used for two weeks post-operatively in all patients. Lateral cephalograms were obtained pre-operatively, 1 day post-operatively, 6 months after surgery. The changes in anterior nasal spine (ANS), point A, upper incisior (U1), and point of maxillary tuberosity (PMT) were examined. The maxillas in the fifteen patients of both examination group were repositioned nearly in their planned positions during surgery and no significant post-operative changes in the examined points of the maxilla were found. These results suggest that a combination of a Le Fort I and U-shaped osteotomy is a useful technique for reliable superior repositioning of the maxilla. The post-operative change in the maxilla using this combination osteotomy was comparatively stable.

Keyword

U-shaped osteotomy; Superior repositioning of the maxilla; Combination osteotomy

MeSH Terms

Humans
Mandible
Maxilla
Orthognathic Surgery
Osteotomy
Osteotomy, Sagittal Split Ramus
Rubber
Spine
Rubber