MXILLOFACIAL BIOMECHANICS IN MASTICATION OF JAW DEFORMITIES

下颌畸形，即面部畸形，表明了各种审美问题，这些问题不能留在个性的解释范围内。颌骨畸形也表现出颌面生物力学的不协调。稳定的口腔颌面功能保证了颌面生物力学的和谐。一些口腔颌面功能障碍表现为下颌畸形。颌骨畸形的治疗不仅需要矫正美观问题，还需要矫正功能问题。颌面生物力学问题的分析是颌骨畸形包括功能矫正的最佳治疗方案，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术前和术后的形态学分析、咀嚼分析和有限元分析之间的检验，在颌骨畸形矫治中建立生物力学的和谐是很重要的。有限元方法表明颌骨畸形具有复杂的生物力学缺陷。颌骨畸形术前和术后的形态学和咀嚼学分析表明，颌面平衡的建立表明颌骨畸形患者的颌功能有明显改善。采用有限元法分析表明，颌面平衡矫正后，颌骨畸形的生物力学缺陷有所减少。然而，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以充分矫正颌骨畸形。

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.