摘要
目的:了解正常上颌复合体在不同状态相同载荷条件下,上颌窦区的应力分布变化情况,进一步探讨其本身的生物力学行为特征。方法:在自主建立的三维有限元模型基础上,利用ANSYS软件分别模拟张口位和正中咬合时上颌复合体的边界条件,计算并绘制出2种工况下上颌窦区各种应力的数据和图像。结果:正常上颌窦在正中咬合和张口位2种状态下,双侧第一磨牙受垂直集中压力作用,其各部位应力值均较小;当受到相同的载荷作用时,应力大小是不相等的。正中咬合时应力值小于张口位。结论:正常上颌窦各壁应力值在2种工况下均远远小于加载力,其中张口位应力分布不如正中咬合时均匀。
Objective： To find the changes of stress distribution in the maxillary sinus region of normal maxillary complex under different conditions, and explore the feature of biomechanical reaction of this complex. Methods： Simulating the different boundary conditions at open-mouth position and during centric occluding, the characters of stress distribution are analyzed and compared by three dimensional finite element method. Results： The values of stresses in normal maxillary sinus during centric occluding and at open-mouth position are very small. But the stress at open-mouth position is much higher than that during centric occluding under the same loading. Conclusion： Maxillary complex may play the role of dispersing applied concentrated forces. The function of maxillary sinus must be considered during the study process of maxillary complex biomechanics.
出处
《中华老年口腔医学杂志》
2007年第2期88-89,108,共3页
Chinese Journal of Geriatric Dentistry
关键词
上颌复合体
生物力学
有限元法
应力分析
maxillofacial
biomechanics
finite element method
stress analysis
