Biomechanical evaluation of a T-shaped miniplate fixation of a modified sagittal split ramus osteotomy with buccal step, a new technique for mandibular orthognathic surgery
Biomechanical evaluation of a T-shaped miniplate fixation of a modified sagittal split ramus osteotomy with buccal step, a new technique for mandibular orthognathic surgery
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DOI：
10.1016/j.tripleo.2010.03.028
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发表时间：
2011-01-01
期刊：
影响因子：
--
通讯作者：
Bell, William
中科院分区：
文献类型：
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作者：
Aymach, Zaher;Nei, Hitoshi;Bell, William
目标。本研究的目的是评价T型微型钢板固定改良升支矢状劈开截骨术(MSSRO)的稳定性，并与标准升支矢状劈开截骨术(SSRO)的单、双平行直线微型钢板固定进行比较。本研究选用18个下颌骨复制体，分为3组。第一组和第二组应用标准SSRO，第三组采用颊台阶切断MSSRO。前移7 mm后，3组固定方式分别为单直微型钢板、双平行直线微型钢板和T形微型钢板。每个模型都固定在一个夹具中，并在前牙上承受垂直载荷。T型微型钢板组的稳定性显著高于单个直形微型钢板组。T型微型钢板组与双平行直形微型钢板组的稳定性无显著差异。在实验室环境下，对于7 mm的下颌前移手术，与标准的标准SSRO固定相比，使用MSSRO和颊台阶作为组合使用的T形微型钢板显著优化了固定的阻力和稳定性。(《口腔外科》《口腔医学》《口腔病理学》《口腔放射科》2011；111：58-63)
Objective. The purpose of this study was to biomechanically evaluate the stability of a T-shaped miniplate fixation of a modified sagittal split ramus osteotomy (MSSRO) with buccal step and to compare it with single or double-parallel straight miniplates fixing a standard sagittal split ramus osteotomy (SSRO).Study design. Eighteen Synbone mandibular replicas were used in the study and divided into 3 groups. Standard SSRO was applied in the first and second groups, and the third group was cut for MSSRO with buccal step. After 7 mm of advancement, fixation modalities for the 3 groups included a single straight miniplate, double-parallel straight miniplates, and a T-shape miniplate, respectively. Each model was secured in a jig and subjected to vertical load on the anterior teeth.Results. The T miniplate group showed a significantly higher value for stability than the group with a single straight miniplate. There was no significant difference in stability between the T miniplate and the double-parallel straight miniplate groups.Conclusion. For mandibular advancement surgery of 7 mm in a laboratory environment, a T-shaped miniplate used with MSSRO and buccal step as a combination significantly optimize the resistance and stability of the fixation compared with a standard SSRO fixed with a single straight miniplate. (Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2011;111:58-63)