Proffit W R, Phillips C, Dann C, Turvey T A
University of North Carolina, School of Dentistry, Chapel Hill.
Int J Adult Orthodon Orthognath Surg. 1991;6(1):7-18.
Postsurgical stability of mandibular setback to correct mandibular prognathism was compared for three approaches: transoral vertical ramus osteotomy, bilateral sagittal split osteotomy with wire osteosynthesis and maxillomandibular fixation, and bilateral sagittal split osteotomy with rigid internal fixation via bone screws. In the transoral vertical ramus osteotomy group, the mean postsurgical change in chin position was almost zero, but nearly 50% of the patients did have clinically significant changes in chin position; two thirds of these movements were posterior and one third anterior. In the bilateral sagittal split osteotomy groups, the chin either stayed in its immediately postsurgical position or moved anteriorly. In one fourth of the patients who received maxillomandibular fixation and in nearly half of the patients who received rigid internal fixation, the chin moved forward more than 4 mm.
经口垂直升支截骨术、双侧矢状劈开截骨术加钢丝骨固定及颌间固定，以及双侧矢状劈开截骨术加骨螺钉坚强内固定。经口垂直升支截骨术组中，术后颏部位置的平均变化几乎为零，但近50%的患者颏部位置有临床上显著的变化；其中三分之二的移动是向后的，三分之一是向前的。在双侧矢状劈开截骨术组中，颏部要么保持在术后即刻的位置，要么向前移动。在接受颌间固定的患者中，四分之一的患者以及接受坚强内固定的患者中，近一半的患者颏部向前移动超过4毫米。
