摘要
目的 :对正常人下颌升支在不同咀嚼力作用时应力分布情况进行三维有限元分析。方法 :采用三维有限元应力分析的方法 ,对正常离体人下颌升支在不同加载条件下的应力分布特征进行对比定量分析。结果 :(1)所有载荷形式的各种应力值 ,随着单元距加载点的距离的增大 ,其应力值相对减小。 (2 )下颌骨下颌角、升支后缘的应力梯度变化较大。结论 :下颌骨下颌角、升支后缘是应力相对集中的区域 ,也是临床上常见的下颌骨骨折区 ,同时还是下颌升支矢状骨劈开术后加强固定以及防止骨段移位的区域。
Objective: To investigate, when bearing different loads, normal mandibular stress distribution. Methods: By means of 3 dimensional finite element method, quantitative analysis was made on the features of mandibular stress distribution under different loads when the mandibular is separated from the body. Results: The stress was distributed to the mandibular, and increased along with the distance from the loading point; Big gradient changes and high tension of stress were found at mandibular angle and along the posterior border of the ramus. Conclusion: The mandibular angle and the posterior border of the ramus are the areas of relative amssment of stress, and the common places that fracture happens, and they are also the places of strengthening application to prevent bone segment from moving after SSRO.
出处
《贵阳医学院学报》
CAS
2003年第3期189-191,196,共4页
Journal of Guiyang Medical College
基金
国家自然科学青年基金资助
关键词
下颌升支区
应力分布
三维有限元法
分析
生物力学
口腔外科手术
mandible
stress,mechanical
fractures,stress
biomechanics
oral surgical procedures
three dimensional finite element
