하악골 상행지 시상분할골절단술후 경성고정법의 유한요소적 해석

The 3-dimensional finite element analysis of fixation method following sagittal split ramus osteotomy of mandible : a comparison of screw fixation and miniplate fixation

The stability of rigid fixation method after Sagittal split ramus osteotomy of mandible was evaluated by using 3 Dimentional Finite Element Method model. The Computed Tomography of human mandible was utilized for the 3-D finite element method model construction. Three cases for study were created ; Three bicortical postion screw fixation with triangular form(case I), One monocortical miniplate fixation(case Ⅱ). Two monocortical miniplate fixation(case Ⅲ). The Stability was analyzed by stress and deviation under vertical load The case Ⅲshowed minimum Von-Mises stress and deviation. The case Ⅱappeared less deviation than the case I, and more Von-Mises stress than the case I. There were no demonstrable differences between the three screw cases and one miniplate case with respect to stability. This study leads to the realization that the fixation of mandible with one monocortical miniplate after Sagittal split osteotomy is an acceptable procedure.