悬臂梁长度对种植牙周骨界面应力分布规律影响的三维有限元分析  

THE INFLUENCE OF CANTILEVER LENGTHS ON THE STRESS DISTRIBUTION PATTERNS OF THE INTERFACE BETWEEN THE BONE AND DENTAL IMPLANTS WITH THREE-DIMENSION FINITE ELEMENT ANALYSIS

作　　者：邹敬才[1] 刘宝林[2] 唐文杰[1] 肖光裕[1] 

机构地区：[1]第四军医大学唐都医院口腔科,西安710038 [2]第四军医大学口腔医学院颌面外科

出　　处：《医用生物力学》2001年第2期90-94,共5页Journal of Medical Biomechanics

摘　　要：目的：为了探讨悬臂梁的存在及其长度对种植牙周骨界面应力传递、分布规律的影响。方法：采用三维有限元方法，从理论上探讨了悬臂梁的存在及其长度对种植牙周骨界面应力传递、分布规律。结果：悬臂梁存在时，加大了靠近悬臂梁端种植牙周颈部密质骨内的最大压应力、最大拉应力，随悬臂梁长度的增加，其应力也随之增加。统计学比较相互间有显著差性Ｐ＜０．００１。悬臂梁存在与加长，均由颈部密质骨承担主要应力，相互间有显著的差异性，Ｐ＜０．０００１。颈周密质骨横断面观，见悬臂梁式种植牙最大压应力位于靠近悬臂梁端种植牙远中侧，最大拉应力则位于近中侧。结论：悬臂梁的存在及长度的增加，依靠近悬臂梁侧种植牙颈周应力比近中种植牙颈周骨内应力加大显著，各种植牙间骨内应力分布不均悬臂梁的存在，加大了靠近悬臂梁侧种植牙颈周的最大拉、压应力，使颈部应力集中更加明显，应力完全由颈周密质骨承担，使种植牙周颈部骨吸收更加剧。Objective: To investigate the influence of cantilever lengths on the load transfer and stress distribution patterns of the interface between the bone and dental implants. Methods: Authors analyzed the effects of three different cantilever lengths (0,5,10mm) on the stress distribution patterns of the interface between the bone and dental implants using three-dimension finite element method. Results: When cantilever was existed the maximum stresses occurred at the most distal bone/implant interface located on the loaded side and significantly increased with the length of the cantilever (p<0.001). Conclusions: Under loading, the highest stresses occurred at the distal cervical bone margin adjacent to the cantilever. The longer the cantilever was, the higher the stress was.

关 键 词：种植牙 悬臂梁 骨界面 应力分布 三维有限元分析 

分 类 号：R783.6[医药卫生—口腔医学] R318.01[医药卫生—临床医学]