论文部分内容阅读
目的分析不同颊舌径的下颌第一磨牙种植冠在不同载荷下,种植体周骨质的受力情况,为临床提供种植冠颊舌径的最适合范围。方法用三维有限元法对不同颊舌径的下颌第一磨牙种植冠,施加垂直均布、垂直集中、45°斜向的载荷,对种植体骨界面上的应力进行分析。结果不同方式的加载力,种植体周围骨质承受应力大小比较:45°斜向>垂直集中>垂直均布;随着颊舌径减小,种植体周围骨质受到的von Mises应力值也相应减小。将颊舌径减小成为原来颊舌径的60%时,种植体及周围骨质受到的最大von Mises应力值最小;但是应力集中的部位没有改变,均是在种植体颈部周围的皮质骨内。结论下颌第一磨牙种植体冠的颊舌减径能起到降低种植体及其周围骨质应力集中的受力情况,所以在种植修复时,科学合理的优化义齿的颊舌径设计,可以有效的保护种植体骨界面的形成,提高种植修复的成功率。
OBJECTIVE: To analyze the forces acting on the peri-implant bone in the mandibular first molar implants with different buccal-lingual diameters, and to provide the most suitable range for the clinical implantation of the implanting denticulation. Methods The mandibular first molar with different buccal and lingual diameters was implanted with three-dimensional finite element method. The vertical and vertical distributions, vertical and 45 ° diagonal loads were applied to analyze the stress on the implant-bone interface. Results Compared with the loading force in different ways, the stress on the bone around the implant: 45 ° diagonally> perpendicularly> perpendicularly distributed. The von Mises stress on the bone around the implant also corresponded with the decrease of the bucco- Decrease Reducing the bucco-lingual calculus to 60% of the original cheek-lingual diameter minimized the maximum von Mises stress on the implant and the surrounding bone; however, the site of stress concentration remained unchanged, both of the cortical bone surrounding the implant’s neck Inside. Conclusions The reduction of the buccal and lingual calculus of the mandibular first molar implants can reduce the stress concentration of the implants and the surrounding bone. Therefore, scientifically and properly optimizing the bucco-lingual design of the dentures can be effective in implants The protective implant bone interface formation, improve the success rate of implant repair.