Endodontics, Warwick Dentistry, The University of Warwick, Coventry, CV4 7AL.
Br Dent J. 2012 Apr 13;212(7):345-6. doi: 10.1038/sj.bdj.2012.268.
Successful root canal therapy relies on many factors, not least of all mechanical shaping. Traditionally stainless steel files were used, but the introduction of nickel titanium (NiTi) alloys significantly broadened the instrument design options available to the practitioner. NiTi has allowed manufacturers to produce larger more flexible instruments that can be used mechanically which speeds up canal preparation and reduces fatigue. However, they are relatively expensive and are susceptible to fracture. Recently the use of NiTi instruments in a reciprocating motion have been introduced which claim to reduce the fracture incidence, and negate the need for a glide path.
根管治疗的成功依赖于许多因素，而机械预备则是其中尤为重要的一环。传统上使用不锈钢器械，但镍钛（NiTi）合金的出现大大拓宽了器械设计的选择范围。NiTi 允许制造商生产更大、更灵活的器械，这些器械可被机械使用，从而加速根管预备并减少疲劳。然而，它们相对昂贵，并且容易发生断裂。最近，有人提出在根管预备中采用往复运动的 NiTi 器械，声称这可以降低器械的折断发生率，并且无需预弯根管。
