Evaluation of remaining dentine thickness using wave one and one shape fi le system with cone beam computed tomography

Background: The study was to evaluate the eff ect of Wave One fi le system s and One Shape fi le system on the dentine thickness in the apical area of the root canal. Materials and Methods: In this study, a total of 40 freshly extracted human mandibular fi rst molars were taken. All the teeth were categorized into two groups namely Group I: Wave One, Group II: One Shape. Mesio buccal canal of mandibular fi rst molar was selected for this study. Conventional endodontic access was prepared in each tooth, and working length was determined using 15-k fi le. Pre-operative cone beam computed tomography (CBCT) scan of the teeth was taken. Cleaning and shaping of the canal was done according to the fi le system. Post instrumentation CBCT scan of teeth was taken. The pre and post instrumentation images of the teeth were superimposed and the diff erence in the area was calculated and statistical diff erence was analyzed. Result: One shape removed less dentin than Wave One fi le system. Conclusion: Wave One and One Shape showed statistically signifi cant diff erence in remaining dentin thickness over the diff erent intervals of root canal length. Therefore, it was concluded that One Shape fi le system removed less residual dentine than Wave One fi le system.