Influence of defects in solution irrigating dentinal training after preparation with System Reciproc®

Abstract Introduction Different sodium hypochlorite concentrations are available for use during the mechanical preparation of root canals by reciprocating instruments. Because of the speed with which the channel is instrumented in this new reciprocating kinematics, higher concentrations of sodium hypochlorite (NaOCl) has been recommended. Thus, it is opportune to research to evaluate whether the irrigant NaOCl solution enhances the possibility of formation of dentinal defects caused by Reciproc system. Objective To analyze the influence of irrigating sodium hypochlorite solution in the formation of dentinal defects caused by Reciproc® instrumentation system. Material and method We used 60 extracted first premolars were divided into two groups (G1) NaOCl 5.25% (n = 30); (G2 Control) Distilled water (n = 30), only the buccal conduit was instrumented with Reciproc® system and irrigated with the solutions. All the crowns of the teeth were cut perpendicular to the long axis, and the roots included in alveoli and simulated periodontal ligament. Palatal conduits were not instrumented or irrigated, because they served as a control for the specimen itself. At the end of the instrumentation, the roots were cut at 2, 4, 6 and 8 mm from the apical foramen and taken to the stereoscopic microscope to assess and record the formation of dentinal defects. Result Dentinal defects were found in the control group (G2) and sodium hypochlorite 5.25% group (G1), but no statistically significant difference between them (p> 0.05). Conclusion Sodium hypochlorite not triggered dentinal defects changes when used in combination with instrumentation for Reciproc® system.