Milosevic A, Samuels R H
Department of Clinical Dental Sciences, School of Dentistry, University of Liverpool, England.
Int J Adult Orthodon Orthognath Surg. 1997;12(2):122-8.
Mandibular mobility and the occurrence of occlusal interferences were assessed in a group of 42 subjects, all of whom underwent orthognathic surgery without maxillomandibular fixation. A minimum period of 3 months (mean of 12.9 months) had elapsed since surgery. Mandibular advancement (n = 8) and bimaxillary advancement procedures (n = 8) resulted in significantly greater end-of-treatment overjet than did Le Fort I (n = 12), mandibular setback (n = 3), or maxillary advancement with mandibular setback (n = 11). Mean maximum protrusion (5.9 mm) and mean maximum excursions to right and left (6.8 and 6.1 mm, respectively) were significantly higher after Le Fort I osteotomy. The frequency of right lateral, but not left lateral, non-working-side contacts was significantly greater in the mandibular setback group and the maxillary advancement with mandibular setback group. The mandibular setback group exhibited the only severe interference between retruded contact position and intercuspal position.
对42名受试者进行了下颌运动度和咬合干扰情况的评估，所有受试者均接受了正颌手术且未进行颌间固定。自手术以来已过去至少3个月（平均12.9个月）。下颌前徙术（n = 8）和双颌前徙术（n = 8）导致治疗结束时的覆盖明显大于Le Fort I型截骨术（n = 12）、下颌后缩术（n = 3）或上颌前徙伴下颌后缩术（n = 11）。Le Fort I型截骨术后，平均最大前伸（5.9 mm）以及平均最大向右和向左偏移（分别为6.8和6.1 mm）显著更高。下颌后缩组以及上颌前徙伴下颌后缩组右侧而非左侧非工作侧接触的频率显著更高。下颌后缩组在后退接触位与牙尖交错位之间表现出唯一的严重干扰。
