【作者】 游素兰； 黄远亮； 孙旻； 徐伟；

【Author】 YOU Su-lan,HUANG Yuan-liang,SUN Min,et al. (Department of Stomatology,Shanghai East Hospital affiliated to Tongji University,Shanghai 200120)

【机构】 同济大学附属东方医院口腔科； 同济大学土木工程学院；

【摘要】 目的:比较同一病例3组下颌种植固定全口义齿的骨及种植体应力分布特点,为临床种植修复提供生物力学分析依据方法:建立4个种植体3mm悬臂,6个种植体3mm悬臂,8个种植体3mm悬臂3组下颌种植固定全口义齿的三维有限元模型。在悬臂末端垂直加载100N。结果:种植全口义齿悬臂末端垂直加载时,各组种植体周围颈部骨应力集中。6个种植体组骨压应力和拉应力都最小。种植体应力主要集中在末端和中间种植体的颈部。种植修复上部支架应力主要集中在与远中末端种植体相连接处。结论:末端种植体骨应力集中,易发生松动失败;种植体颈部应力集中,易发生植入体与基桩连接失败6个种植体支持组修复设计在该病例中较符合生物力学分布原理。更多还原

【Abstract】 Objective:o investigate the stress distribution within the 3 kinds distal cantilevered fixed prostheses supported by dental implants in edentulous mandible for the same patient.Methods:The three - dimensional finite element models of 3 kinds(4,6, 8implants)3mm distal cantilevered fixed prostheses supported by dental implants in the same edentulous mandible was established. Vertical force of 100 N was applied to the distal cantilever of fixed prostheses.Results:The maximum bone stresses were at the terminal implant-bone interface.The maximum implant stresses were at the terminal and medium implant - prostheses interface.Distal cantilevered fixed prostheses supported by 6 implants have the least stress in the 3 kinds of distal cantilevered fixed prostheses.Conclusion: The bone around the terminal implant was easily to absorb and the terminal and medium implants were easily to fracture.Distal cantilevered fixed prostheses supported by 6 implants is the best design in the 3 kinds of distal cantilevered fixed prostheses for this patient.更多还原