蘑菇状股骨头表面置换体结构设计

Structure Design of Mushroom Shaped Surface Prosthesis of Femoral Head

目的:为解决在治疗股骨头缺血性坏死时,被置换在人体内的股骨头假体的松动、下沉等医学难题,设计了一套新型的蘑菇状股骨头表面置换体。方法:基于受力转移同时减少股骨头内部应力遮蔽等思路,采用镍钛记忆合金等医用新型合金材料,依据股骨头生物力学及骨生长特点,设计既能持重又能减轻骨溶解,促进骨质生长的新型蘑菇状股骨头表面置换假体。结果:该转换体设计新颖,结构紧凑,体积小,手术范围小且安装方便,固定牢靠。结论:它为解决股骨头置换假体的下沉和松动问题提供了新的设计方案和思路。

Objective To address the medical problems, in treatment of avascular necrosis of the femoral head, on loosening and subsidence of the prosthesis of femoral head. A set of Mushroom Shaped Surface Prosthesis of Femoral Head was designed. Methods Based on biomeehanieal of the femoral head and the principle of transferring the force through femoral head while reducing stress-sheltered, nickel-titanium alloy and other new medical alloy materials were used to develop a prosthesis, which not only can be a weight-bearing device, but also promotes bone-growth. Results The prosthesis is novel, compact and little-volume, and the manipulation of surgery is convenient and secure. Conclusion The design of this prosthesis can provide new ways or ideas for designing the femoral head replacement prosthesis to solve problems on loosening and subsidence.