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Three dimensional finite element stress analysis on superstructure of the fixed bridge supported by tooth-implant
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF STOMATOLOGY
- Issue:
- 6
- DOI:
- 10.3760/j.issn:1002-0098.2003.06.005
- Key Word:
- 牙应力分析;牙种植体;固定桥
Abstract： 目的揭示天然牙-种植体联合桥在咀嚼过程中上部结构应力的分布规律,为临床设计该种类固定桥提供理论参考依据.方法借助于CT扫描和计算机辅助设计手段,用三维有限元方法对天然牙-种植体联合固定桥在不同载荷下,上部结构的应力分布差异以及位移变化进行生物学分析.结果种植体基台在斜向载荷下的最大应力值是垂直载荷下的 4～6 倍,且应力分布不均,有应力集中现象,以压应力为主.桥体(牙合)面的应力峰值在集中载荷下是分散载荷下的数倍,(牙合)面中 1/3 出现力点高度集中的压应力区,但载荷方向对其无影响.种植体基台在近远中向的最大位移明显大于天然牙颈部,固定桥整体移动方向是朝着天然牙运动.结论天然牙-种植体联合桥可通过减少斜向力和集中力或提高基台的结构强度及桥体材料的抗挠曲强度,防止上部结构机械并发症的发生.这种固定桥是可行的.
- [1]皮昕.口腔解剖生理学[M].2000.
- [2]Richard A. Reinhardt,Y. C. Pao,Robert F. Krejci.Periodontal ligament stresses in the initiation of occlusal traumatism[J].1984,19(3).
- [3]巢永烈,杨永丰,赵云凤.天然牙-末端种植牙固定桥的受载分析[J].1995,(1).
- [4]S. D. Cook,A. M. Weinstein,J. J. Klawitter.Parameters affecting the stress distribution around LTI carbon and aluminum oxide dental implants[J].1982,16(6).
- [5]Gross MD,Weiss EI,Kozak D.Effect of repeated closures on opening torque values in seven abutment-implant systems.[J].2000,84(2).
- [6]T, Jemt,W R, Laney,D, Harris,etc.Osseointegrated implants for single tooth replacement: a 1-year report from a multicenter prospective study.[J].1991,6.
- [7]Photini Kamposiora,George Papavasilious,Stephen C. Bayne,etc.Finite element analysis estimates of cement microfracture under complete veneer crowns[J].1994,71(5).
- [8]J. W. FARAH,R. G. CRAIG,K. A. MEROUEH.Finite element analysis of a mandibular model[J].1988,15(6).