MXILLOFACIAL BIOMECHANICS IN MASTICATION OF JAW DEFORMITIES

下颌畸形，即面部畸形，是指各种审美问题，不能留在个性的解释之内。颌骨畸形在颌面部生物力学中也表现出不和谐。稳定的口腔颌面功能一定能保持和谐的颌面生物力学。颌骨畸形表现为一些口腔颌面功能障碍。颌面部生物力学问题的分析是非常重要的，因为包括功能矫正在内的颌骨畸形的最佳治疗方案需要了解颌骨畸形的生物力学问题。本研究的目的是通过对颌骨畸形前后的形态、咀嚼和有限元分析的检验，说明在颌骨畸形矫治中建立生物力学协调性的重要性。术前、术后颌面形态和咀嚼功能分析显示，颌面平衡的建立表明颌骨功能有明显改善。有限元分析也表明颌面平衡矫正后颌骨变形的生物力学缺陷减少。但是，由于颌骨畸形是由许多因素组成的，因此需要更仔细的检查才能充分矫正颌骨畸形。

Jaw deformities, namely, facial deformities indicate various esthetic problems that can not be leave within the explanation of individuality. Jaw deformities also show inharmony in maxillofacial biomechanics. Stable oral maxillofacial functions are sure to keep in harmonious maxillofacial biomechanics.Some oral maxillofacial dysfunctions are demonstrated in jaw deformities. Then the treatment of jaw deformities needs the correction of not only esthetic but also functional problems.The analyses of maxillofacial biomechanical problems are very important because the best treatment planing of jaw deformities including the functional correction needs to understand the problems of biomechanics in jaw deformities.The purpose of this study is to show that it is important to establish the biomechanical harmony in the correction of jaw deformities by the examination between the morphological, masticatory and finite elemental analyses of pre- and postoperative jaw deformities.A finite element method indicated jaw deformities had intricate biomechanical disadvantages. The morphological and masticatory analyses in pre- and post operative jaw deformities showed the establishment of the maxillofacial balance in jaw deformities indicated apparent improvement in the jaw functions.The analyses using a finite elemental method also showed decrease in the biomechanical disadvantages of the jaw deformities following the correction of maxillofacial balance.However, more careful examination for the sufficient correction of jaw deformities is needed because jaw deformities are composed of many elements.