目的：设计和制造面向即刻种植的个性化拟自然牙种植体，并提出个性化拟自然牙种植体的过盈量设计要求。方法：利用逆向工程和3D 打印技术设计和制造出个性化拟自然牙种植体；设计过盈量分别为10，20，30，40，50，60，70，80，90，100μm的10颗个性化拟自然牙种植体，模拟植入相同拔牙窝后的情况，并进行有限元分析。结果：在相同的过盈量条件下，皮质骨区域比松质骨区域的应力值要大。随着过盈量的增大，种植体在骨界面的应力就越大，且皮质骨区域比松质骨区域先达到屈服强度。结论：在设计个性化拟自然牙根种植体的过程中，皮质骨和松质骨区域的过盈量设计应当不同，且皮质骨区域应小于松质骨区域。%Objective: To design a kind of custom-made, root-analogue implant for immediate implant placement. Propose the design requirements of the interference of the implant by finite element analysis. Methods: Design and manufacture the implant with the help of RE and 3D printing technology. Design 10 custom-made, root-analogue implants with the interference of 10, 20, 30, 40, 50, 60, 70, 80, 90, 100μm respectively. Simulate the implantation with the same extraction socket by finite element analysis. Results: Under the same condition, stress of cortical bone area is larger than cancellous bone area. With the increasing amount of interference, the greater the stress of implant-bone interface and cortical bone area reach the yield strength first. Conclusions: In the process of designing a custom-made root-analogue implant, the amount of interference of cortical and cancellous bone area should be designed differently. And the amount of interference of cortical bone area should be less than cancellous bone area's.
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