Ⅱ类骨质量下短种植体表面设计对骨界面应力分布的影响

Effects of different surface design of short implant on stressdistribution in implant-bone interface in Class Ⅱ bone

目的:探讨骨质量和种植体表面设计对短种植体-骨界面应力分布的影响。方法:利用3D—Doctor软件和ABAQUS软件建立V形螺旋设计、反支撑形螺旋设计、支撑形螺旋设计和鳍式非螺旋设计的短种植体植于类骨质量的上颌骨后区的三维有限元法模型4个。对所有模型进行垂直和侧向加载,分析比较周围骨组织的应力分布和Von-Mises应力峰值。结果:垂直向和侧向加载时,反支撑形和支撑形螺纹设计与鳍式非螺旋设计都表现出较好的应力分布特征。结论:支撑形螺旋设计、反支撑形螺旋设计和鳍式非螺旋设计均适用于短种植体,应避免应用V形螺旋表面设计。

Objective：To investigate the effects of different surface design of short implant on stress distribution in implant--bone interface in Class Ⅰ bone. Methods：Four models were established by 3D-Doctor and ABAQUS computer software, short implants of Ⅴ-shape spiral design, reverse buttress spiral design, buttress spiral design and fin formula no--spiral design were embedded in Class Ⅱ bone of the maxillary posterior area. The stress distribution and the maximum Von--Mises stress of all models were compared and analyzed under axial and oblique loads. Results：Under axial and oblique load,reverse buttress spiral design, buttress spiral de- sign and fin formula no- spiral design showed better stress distribution. Conclusion：Reverse buttress spiral design,buttress spiral design and fin formula no--spiral design all appear to be suitable for short implants andV-- shape spiral design should be avoid.