Abstract
Influence of Access Cavity Design on Fatigue Resistance of Reciproc Blue: Conservative vs. Truss Access
Highlights
Several factors including the access to the root canal systems could influence the fatigue of rotating or reciprocating endodontic instruments
Endodontic files activated by reciprocating movement is purported to always work below their elastic limit extending their cyclic fatigue life [68]
The factors involved in endodontic files failure may be directly related to its design: Dimensions at the tip, taper, cutting efficiency, alloy [9,10], manufacturing process [10]
Summary
Several factors including the access to the root canal systems could influence the fatigue of rotating or reciprocating endodontic instruments. The aim of this study was to assess the effect of conservative (CAC) and truss access cavity (TAC) preparation on the cyclic fatigue resistance of endodontic nickel-titanium (NiTi) files. Fracture variables of NiTi instruments may depend on external factors such as curvature and radius of root canal, speed of rotation [11], type of movement and number of sterilization cycles [9,12]. Each of these parameters was object of studies previously. A small hole is performed approximately in the middle of the occlusal sur-
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