镍钛合金根管器械分离制造学因素的研究进展  

Research progress on manufacturing factors of the fracture about nickel-titanium endodontic instruments

作　　者：陈晓春[1] 陈新梅[1] 

机构地区：[1]四川大学华西口腔医院牙体牙髓病科,四川成都610041

出　　处：《国际口腔医学杂志》2009年第3期358-360,共3页International Journal of Stomatology

摘　　要：镍钛器械在使用过程中较不锈钢器械更容易分离,且分离前无肉眼可以分辨的形变或者缺陷,这使其使用受到了较大的限制。镍钛器械在出厂后未使用之前,其内部和表面已经存在许多的缺陷,这在一定程度上导致了器械的分离。近年来,一些新的制造方法和后处理技术应用于镍钛器械,改善了其内部和表面性状,增加了弹性和抵抗分离的能力,有效地减少了分离的发生。本文对镍钛合金器械分离的制造学因素作一综述。Although the nickel-titanium （Ni-Ti） alloy with super-elastic property is more and more used in endodontics, it has been reported that rotary Ni-Ti instruments are more prone to intracanal fracture compared with stainless steel instruments. These unexpected fractures occur without any visible changes to the instruments which produce a prominence problem creating a major obstacle to normally routine therapy. Many studies showed that the presence of defects on and in the Ni-Ti instruments before used restrict clinical application. In recent years, considerable attempt has been undertaken to improve these condition and produced more flexible and resistant Ni-Ti endodontic instruments, which may minimize the occurrence of fractures. This article reviewed the development of manufacturing methods of Ni-Ti endodontic instrument.

关 键 词：镍钛器械 制造学 器械分离 表面处理 

分 类 号：TH787[机械工程—仪器科学与技术]