1st Faculty of Medicine, Charles University in Prague, Department of Maxillofacial Surgery, Prague, Czech Republic.
Int J Oral Maxillofac Surg. 2012 Apr;41(4):482-8. doi: 10.1016/j.ijom.2011.11.005. Epub 2011 Dec 9.
Bilateral sagittal split osteotomy of the mandible with counterclockwise rotation of the occlusal plane alone has traditionally been considered the least stable treatment method. Two miniplates on each side of the osteotomy may resolve this problem. The authors compared early vertical and transverse stability of a simple mandibular advancement (group A), mandibular advancement with counterclockwise rotation (CCW) stabilized with one miniplate (group B), and two miniplates (group C) on mini-pig mandibles mounted on a custom-made loading unit. Two miniplates markedly increased the resistance to vertical bite forces. On a 100-N load, a median of dislocation of 0.53 mm, 0.46 mm, and 0.23 mm was achieved in groups A, B, and C, respectively. The difference was statistically significant between groups A and B in comparison with group C. The results of transverse displacement were not statistically significant. The use of two miniplates in larger shifts, as well as in CCW cases, increases stability in the vertical direction.
单纯下颌骨矢状劈开截骨伴逆时针旋转的双侧下颌骨旋转通常被认为是最不稳定的治疗方法。在骨切开术的每一侧使用两块小钢板可能会解决这个问题。作者比较了简单下颌骨前伸术（A 组）、用一块小钢板（B 组）稳定的下颌骨前伸伴逆时针旋转（CCW）和在定制加载单元上安装的迷你猪下颌骨上的两块小钢板（C 组）的早期垂直和横向稳定性。两块小钢板显著增加了对垂直咬合力的抵抗力。在 100N 的负载下，A、B 和 C 组的脱位中位数分别为 0.53mm、0.46mm 和 0.23mm。与 C 组相比，A 组和 B 组之间的差异具有统计学意义。横向位移的结果没有统计学意义。在较大的移位和 CCW 情况下使用两块小钢板会增加垂直方向的稳定性。
