生物活性陶瓷涂层假体植入股骨初期的界面生物力学分析  

Study of biomechanical properties on the interface between femora and bioactive ceramics coatings prosthesis during the initial implant stage

作　　者：唐六丁[1] 朱坚民[2] 李秉哲[1] 戴尅戎[3] 

机构地区：[1]河南科技大学工程力学研究所,洛阳471003 [2]河南科技大学医学工程技术学院,洛阳471003 [3]上海第二医科大学附属第九人民医院,上海200011

出　　处：《医用生物力学》2005年第2期76-80,共5页Journal of Medical Biomechanics

基　　金：河南省自然科学基金资助项目(0211061800)

摘　　要：目的对具有生物活性的羟基磷灰石陶瓷涂层假体植入股骨初期进行界面生物力学分析,以优化金属表面生物活性陶瓷涂层厚度。方法建立生物活性陶瓷涂层假体紧压配合植入股骨初期的生物力学模型,应用非均质层状材料弹性力学理论,定量计算不同厚度涂层钛合金假体与股骨峡部界面的紧压配合力及环向应力。结果无涂层钛合金假体与骨结合的紧压配合力最大,随着涂层厚度增加,紧压配合力逐渐减小。环向应力在界面的骨皮质上有较大的拉应力,在涂层和钛合金假体柄上为压应力。结论生物活性陶瓷涂层较薄的假体与股骨结合的抗剪切强度较大。Objective To analyze the interface biomechanical properties between femora and bioactive ceramics coatings prosthesis during the initial implant stage. The objective is to optimize the thickness of bioactive ceramics coatings on the metal surface. Methods Biomechanical models of press fit implanting the femora with non-homogeneous layer-like materials were used to quantify the press fit strength and circumferential stress of the interface when the femora were replaced with the different thickness of bioactive ceramics coatings prosthesis during the initial implant stage. Results The maximum press fit strength appears on the interface between femora and non-coatings layer Ti alloy prosthesis; the press fit strength decreased with the thickness increase of coatings layer. The circumferential stress displayed as the large tensile stress at the femora side of the interface; the compressive stress appeared at the coatings layer and Ti alloy prosthesis side of the interface. Conclusion The shearing strength of joint between the prosthesis and femora would be bigger with the thinner bioactive ceramics coatings.

关 键 词：生物活性陶瓷 陶瓷涂层 假体 股骨 界面生物力学 

分 类 号：R318.01[医药卫生—生物医学工程]