Postoperative stability after sagittal split ramus osteotomies for a mandibular setback with monocortical plate fixation or bicortical screw fixation
Postoperative stability after sagittal split ramus osteotomies for a mandibular setback with monocortical plate fixation or bicortical screw fixation
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DOI：
10.1016/j.joms.2007.06.643
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发表时间：
2008-03-01
影响因子：
1.9
通讯作者：
Hwang, Kyung-Gyun
中科院分区：
文献类型：
--
作者：
Chung, Il-Hyuk;Yoo, Chung-Kyu;Hwang, Kyung-Gyun
目的：这项比较研究进行分析下颌骨稳定性后，双侧矢状劈开升支截骨下颌骨的挫折与单皮质板固定或bicortical screw fixation.Patients和方法：共60例患者的骨骼III类错谁进行矢状劈开截骨和下颌骨挫折被列入本研究。在这些患者中，30例采用钛板进行单皮质骨固定，另30例采用定位螺钉进行双皮质骨固定。该回顾性研究使用术前（TO）、术后1周（T1）、3个月（T2）和1年（T3）拍摄的头影测量X线片。在每个时间段测量颏部的头影测量标志的线性和角度变化，并确定每个头影测量标志在4个不同时间段的变化：TO至T1（Δ T1），T1至T2（Δ T2），T2至T3（Δ T3）和TO至T3（Δ T4）。结果：手术改变（Δ T1）表现为下颌体后移和颏标志后上移。术后3个月和12个月的头影测量分析结果（Δ T2和Δ T3）可表征为下颌骨的前上运动。在两个治疗组中，手术变化相对较好地维持。同样，下巴标志的水平和垂直运动的分析表明，两组有相似的趋势。有没有统计学上的显着差异，术后变化的测量在每个时间段aftersurgery.Conclusions：我们的研究结果表明，有没有显着差异，在下颌骨形状的术后变化，在两个单皮质和双皮质固定组后矢状劈开支截骨术。我们的结论是，使用微型接骨板的单皮质骨固定术可用于获得稳定的术后变化后下颌后退。(c)2008年美国口腔颌面外科医师协会。
Purpose: This comparative study was performed to analyze mandibular stability after bilateral sagittal split ramus osteotomies for a mandibular setback with a monocortical plate fixation or bicortical screw fixation.Patients and Methods: A total of 60 patients with a skeletal Class III malocclusion who underwent sagittal split osteotomies and mandibular setback were included in the present study. Among the patients, 30 were osteosynthesized monocortically with a titanium plate, while the other 30 were osteosynthesized bicortically with positioning screws. This retrospective study used cephalometric radiographs taken preoperatively (TO), and at I week (T1), 3 months (T2), and 1 year (T3) postoperatively. The linear and angular changes of the cephalometric landmarks of the chin region were measured at each time period, and the changes of each cephalometric landmark were determined for 4 different time intervals: TO to T1 (Delta T1), T1 to T2 (Delta T2), T2 to T3 (Delta T3), and TO to T3 (Delta T4). Postoperative changes in mandibular shape were analyzed using a paired t test to determine the stability of fixation methods.Results: The surgical changes (Delta T1) Could be characterized as posterior movements of the mandibular body and posterosuperior movements of the chin landmark. The results of the cephalometirc analysis at 3 and 12 months postsurgery (Delta T2 and Delta T3) could be characterized as anterosuperior movements of the mandible. In both treatment groups, surgical changes were relatively well maintained. Likewise, analysis of the horizontal and vertical movements of the chin landmarks indicated a similar tendency in both groups. There were no statistically significant differences between the measurements of postoperative changes at each time period after surgery.Conclusions: The findings of our study suggest that there were no significant differences in postoperative changes in mandibular shape in both the monocortical and bicortical fixation groups after sagittal split ramus osteotomy. We concluded that monocortical osteosynthesis using a miniplate could be used to obtain stable postoperative changes after mandibular setback. (c) 2008 American Association of Oral and Maxillofacial Surgeons.