根管预备中镍钛器械的应力分布及牙根的抗力性改变

Stress distribution of Ni-Ti rotary instrument and the mechanical characters of tooth root during preparation

机用镍钛器械柔韧性能佳,在根管治疗尤其是细小弯曲及磨牙根管预备中应用前景光明,但器械折断和术后根折仍是临床实践中的棘手问题。近年来,很多学者对根管预备过程中镍钛器械的应力分布及牙根的抗力性改变进行了探讨,本文就其研究进展作一综述。

The prospect of Ni-Ti rotary instruments in root canal therapy especially small bending and molar application is quite bright, because of its good flexible property. But instruments separation and postoperative root fracture are still common problems in clinical practice. In recent years, many scholars have discussed the stress distribution of Ni-Ti rotary instrument and the mechanical characters of tooth root during preparation. This review focused on the clinical research recently.