Abstract
Root canal therapy is a vital procedure for saving teeth by removing infection and cleaning the complex root canal system. However, a delicate balance exists between thorough cleaning and preserving tooth strength. The study aims to evaluate theinstrumentation effect of three innovative file systems, XP-endo® shaper, Reciproc®, and Self-adjusting file (SAF) on fracture resistance of mandibular premolars. Thirty single-rooted mandibular premolars were collected; a standard access cavity was preparedand the working length was established 1 mm short of the apex.The teeth were randomly divided into three groups(n=10). In Group 1,the shaping of the specimens was achieved using XP-endo® shaper; in Group 2, it was instrumented using Reciproc® file; and in Group3, it was instrumented using SAF. All samples were decoronatedandthe roots were mounted vertically inacrylic resin and subjected to fracture resistance under a universal testing machine. Intergroup analysiswas doneby one-way ANOVAfollowed by Bonferroni posthoc test,which did not report astatistically significant difference (p>0.05). All three testedfile systems were similar in fracture resistance. XP-endo® shaper exhibited better fracture resistance on root canal instrumentation when compared to Reciproc® and SAF although they are not statistically significant.
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