种植体数目对支持组织应力分布的影响  

The influence of implant number on the stress distribution in the supporting tissues

作　　者：张铁[1] 马轩祥[1] 张少锋[1] 姚月玲[1] 

机构地区：[1]西安第四军医大学口腔医学院

出　　处：《实用口腔医学杂志》1999年第3期230-231,共2页Journal of Practical Stomatology

基　　金：国家自然科学基金

摘　　要：目的：了解不同数目骨融合种植体所支持的下颌覆盖义齿，在承受牙合力时其支持组织——牙槽骨及种植体周围的应力分布状况，探讨种植体数目变化对支持组织应力分布的影响规律。方法：应用三维光弹应力冻结切片法，对分别由２、４、６颗种植体所支持的下颌覆盖义齿，在垂直载荷下的应力状况进行冻结，并在相应部位切片观察，以了解在几种不同情况下的覆盖义齿的内部应力分布规律。结果：在不同数目种植体为基牙的覆盖义齿中，牙槽骨及种植体骨界面的应力值随着种植体数目的增加而减少，两者呈负相关关系。结论：在条件允许的情况下，应尽可能多地选用种植基牙。Objective: To investigate the stress distribution in the supporting tissuealveloar bone and implant under occlusal force of implantsupported mandibular overdentures with different number of implants. Methods:Threedimensional photoelastic frozen section method was used to freeze the stresssituation of implantsupported mandibular overdentures with vertical load that supported by different number of implants(2,4 or 6); slices from corresponding areas were made to investigate the internal stress distribution of the overdentures. Result: The stress in alveolar bone and implantbone interface decreased when the number of implant increased. Conclusion: More implant abutments should be used if possible in clinical application.

关 键 词：义齿 种植 种植体 数目 应力分析 光弹性试验 

分 类 号：R783.6[医药卫生—口腔医学]