Cyclic fatigue resistance of heat-treated NiTi endodontic files reduces at body temperature compared to room temperature
Nickel-titanium (NiTi) engine-driven instruments continue to be the mainstay in performing mechanical debridement and shaping during endodontic treatment. It has revolutionized the root canal preparation technique by decreasing operator fatigue, time, and procedural errors associated with manual instrumentation.[1] Despite the increased flexibility, a major concern related to their use is the possibility of intracanal separation.
Cyclic fatigue resistance of heat-treated NiTi endodontic files reduces at body temperature compared to room temperature, suggests a recent study published in the Journal of Conservative Dentistry.
The aim of this systematic review was to compare the effect of body temperature (I) on the cyclic fatigue resistance (O) of nickel–titanium (NiTi) endodontic instruments (P) to that of room temperature (C). Methods: The study was registered in the PROSPERO database (CRD42020204286). A systematic search in PubMed, Scopus, Web of Science, Google Scholar, and OpenGrey was conducted in English until December 31, 2021. In vitro studies comparing the cyclic fatigue resistance of NiTi instruments at the body (35°C ± 2°C) and room temperature (20°C–25°C) were included. Eligible studies were evaluated for risk of bias and meta-analyzed to estimate the effects.
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