【摘要】 目的:探讨圆柱形螺纹种植体螺纹形态对骨组织应力分布的影响,为临床设计和选择最佳的螺纹形态提供理论依据。方法:建立了12种包含不同螺纹形态种植体的颌骨骨块三维有限元模型:1 mm、2 mm和3 mm矩形螺纹设计(S-1、S-2和S-3);90°、60°和30°V形螺纹设计(V-1、V-2和V-3);45°、30°和15°支撑形螺纹设计(B-1、B-2和B-3);45°、30°和15°反支撑形螺纹设计(R-1、R-2和R-3)。对所有模型进行应力分布和Von M ises应力峰值的比较。结果:垂直向加载下S-2、V-3、B-3、R-1、R-2和R-3螺纹表现出较好的应力分布状态,在颊舌向加载下S-1、S-2、V-3、B-3、R-2和R-3螺纹表现出较好的应力分布状态。结论:提示S-2、V-3、B-3、R-2和R-3螺纹设计均适用于圆柱形种植体,反支撑螺纹为圆柱形种植体的最佳螺纹设计选择。更多还原

【Abstract】 Objective: To determine the optimal thread shape for an experimental cylinder implant.Methods: Twelve three-dimensional finite element models of different thread shapes were created: 1mm,2mm,and 3mm square designs(S-1,S-2,and S-3);90°,60°,and 30° V-shaped designs(V-1,V-2,and V-3);45°,30°,and 15° buttress designs(B-1,B-2,and B-3); 45°,30°,and 15° reverse buttress designs(R-1,R-2,andR-3).The stress distributions of all models were compared under axial and buccolingual loads.Results: Models S-2,V-3,B-3,R-1,R-2,and R-3 showed better stress distribution than other models under axial load,and models S-1,S-2,V3,B-3,R-2,and R-3 showed better stress distribution than other models under buccolingual load.Conclusion: S-2,V-3,B-3,R-2,and R-3 thread shapes all appear to be suitable for use in a cylinder implant,and reverse buttress is the optimal design in a cylinder implant.更多还原