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目的研究Ⅱ类骨质平台转换连接种植体不同植入深度对皮质骨应力的影响。方法于2010年3月在滨州医学院(烟台校区)参照Ankylos种植系统种植体和实心基台的真实数据,利用Solidworks2007制图软件,模拟不同植入深度时平台转换连接种植体-基台-Ⅱ类骨质模型,导入Ansys workbench有限元软件,采用垂直向200N和斜向100N加载,分析不同植入深度时的应力分布。结果不同植入深度间皮质骨最大应力差异有统计学意义(P<0.01);当植入深度在皮质骨下2mm范围内时皮质骨最大应力在各向加载时均较稳定。结论为避免应力在骨组织中的过度集中,Ⅱ类骨质植入深度应控制在皮质骨下2mm范围内。
Objective To study the effects of different implantation depths on the stress of cortical bone in type Ⅱ osteal plateau transplants. Methods Based on the real data of Ankylos implants and solid abutments in Binzhou Medical College (Yantai Campus) in March 2010, the software of Solidworks 2007 was used to simulate the changes of implants-abutments-Ⅱ The bone model was introduced into the Ansys workbench finite element software. The stress distribution at different implant depths was analyzed with vertical 200N and oblique 100N loadings. Results There was significant difference in maximal stress between cortical bone at different implantation depths (P <0.01). When maximal cortical bone depth was within 2mm below cortical bone, maximal cortical bone stress was more stable at all loading times. Conclusion In order to avoid over-concentration of stress in bone tissue, the depth of type Ⅱ osteosynthesis should be controlled within 2mm below cortical bone.