Potential of coatings in total hip replacement
Potential of coatings in total hip replacement
复制标题
DOI：
10.1097/01.blo.0000150000.75660.ff
复制
发表时间：
2005-01-01
影响因子：
4.2
通讯作者：
Santavirta, SS
中科院分区：
文献类型：
--
作者：
Lappalainen, R;Santavirta, SS
在全髋关节置换术中，材料的整体性能（如适当的弹性和硬度）非常重要。然而，材料主要在表面与身体相互作用。磨损和腐蚀也在表面开始。因此，使用不同种类的处理或涂层来控制表面特性可以显著改善全髋关节置换术。研究最多的表面处理包括离子注入和控制表面形貌的方法，如喷砂或喷砂或等离子体处理。在各种涂层中，羟基磷灰石、氧化钛和氮化钛、氧化锆、热解碳和类金刚石碳涂层显示出最有前途的结果。这些涂层主要用于促进骨生长;最大限度地减少摩擦、磨损和腐蚀;以及改善全关节假体的生物相容性。从不同类型涂层的结构和性能出发，讨论了新型涂层在解决关节假体中存在的问题方面的潜力。可以得出结论，目前存在涂层方法来改善全髋关节置换术的摩擦学性能和寿命。然而，涂层必须满足两个基本要求：在生物化学和生物力学环境中不分层，并充分保护基材免受腐蚀。
In total hip replacements, the bulk properties of materials, such as proper elasticity and hardness, are important. However, the material interacts with the body mainly at the surfaces. Wear and corrosion are initiated at the surfaces also. Therefore, the control of surface properties using different kinds of treatments or coatings may improve total hip replacements considerably. The most studied surface treatments include ion implantation and methods to control surface topography, such as grit or sand blasting or plasma treatments. Among the large variety of coatings, hydroxyapatite, titanium oxide and nitride, zirconium oxide, pyrolytic carbon, and diamondlike carbon coatings have shown the most promising results. These coatings mainly are used to enhance bone growth; to minimize friction, wear, and corrosion; and to improve biocompatibility of total joint prostheses. The potential of novel coatings to solve some present problems in joint prostheses is discussed based on the structure and properties of different kind of coatings. It can be concluded that currently, coating methods exist to improve the tribologic performance and longevity of the total hip replacements. However, coatings must fulfill two essential requirements: no delamination in biochemical and biomechanical environments and sufficient protection of substrate from corrosion.