首页 > 文献资料
-
形状记忆合金环抱器在骨折中的应用
Objective:To evaluate the effect of encircled fixer of shape memory alloy on bone fracture. Methods:A total of twenty patients with eighteen males and two females was studied. There were three patients with fractares in the upper one third of thighbone, five with fractures in the middle part of thighbone, six with humeral fractures, three with collarbone fractures,one with ulna fracture and two with thighbone fractures as complication of artificial hipbone arthroplasty. After exposure and fixation of fracture ends, prepared encircled fixer was inserted into 0～4℃ normal reline(NS) to lower its temperature, then pulled out with a clamp. Encircled fixer was put on the tersile side of the fractured bone(center pointed to fracture line), restored and stabilized after raising temperature in 40℃ NS. Results: Encircled fixers of shape memory alloy were used to treat twenty patients with bone fracture.Clinical concrescence was obtained in 1.5 to 3 months after operation,and the joint gained its normal function without complication. Conclusion:Encircled fixer of shape memory alloy has features as exerting vertical pressure continoulsy, little stress shield effect and convenient manipulation, especially adapt to stem fracture after artificial arthroplasty.
-
镍钛形状记忆合金材料在骨科应用的研究进展
自1963年Buehler[1]报道了镍钛合金(nitinol)具有形状记忆效应,此后对其本质和应用研究日趋深入.国内外对镍钛形状记忆合金(nitinol shape memory alloy NiTi-SMA)的基础和临床应用做了大量研究,结果表明:NiTi-SMA在体内长期植入可释放Ni离子,因美国、日本、西欧等国家,对引进新的人体用材料有严格的法律规定,目前上述国家除在口腔正畸普及应用NiTi-SMA外,大多还处于动物试验、生化学测试阶段,研制的骨科器械也仅在尸体上或动物体内进行实验.
