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作为生物医用金属材料,钛及其合金具有良好的机械性能和抗腐蚀性能,广泛应用于人体硬组织的修复或替代。但钛植入体在制备过程中会形成惰性氧化层,在硬组织替换过程中,与周围骨组织之间的结合只是机械嵌合而非化学结合,植入体内后容易发生松动和脱落。表面改性技术可在保留钛及其合金原有优良机械性能的基础上,赋予其特殊的生物学功能,从而满足临床需求。本文就医用钛材料的表面改性技术作一综述。
As a biomedical metal material, titanium and its alloys have good mechanical properties and corrosion resistance, and are widely used in the repair or replacement of human hard tissue. However, Ti implants will form an inert oxide layer during the preparation process. During hard tissue replacement, the bonding between the titanium implant and the surrounding bone tissue is only mechanical chimerism rather than chemical bonding, and the titanium implant may easily loosen and fall off after being implanted into the body. Surface modification technology can retain the original excellent mechanical properties of titanium and its alloys, giving it a special biological function to meet the clinical needs. This article reviews the surface modification techniques of medical titanium materials.