镍钛合金根管器械因其具有超弹性及形状记忆能力已在根管预备中广泛应用,但因镍离子释放致癌及易发生器械分离、易腐蚀等缺点,近年来表面改性已成为临床研究热点。表面改性可使材料表面形成生物活性薄膜,有效抑制镍离子析出,增强其抗腐蚀性,改善其生物相容性。表面改性方法包括机械去除法、表面氧化法及表面涂层技术等。本文对镍钛合金根管器械表面改性方法及改性后对其性能的影响进行综述。 Nickel-titanium alloy root canal instruments because of its superelasticity and shape memory capacity has been widely used in root canal preparation, but due to the release of nickel ions carcinogenic and prone to separation of equipment, easy to corrosion and other shortcomings, surface modification in recent years has become a clinical study Hot spots. Surface modification can form bioactive film on the surface of the material, effectively inhibit the precipitation of nickel ions, enhance their corrosion resistance and improve their biocompatibility. Surface modification methods include mechanical removal, surface oxidation and surface coating techniques. This article reviews the methods of surface modification of nitinol root canal instruments and their effects after their modification.