CBCT EVALUATION OF PERICERVICAL DENTIN THICKNESS AFTER COMPLETION OF BIOMECHANICAL PREPARATION WITH FIFTH GENERATION ROTARY FILES

Abstract

Aim and objectives: The purpose of this invitro study was to determine the effect of biomechanical preparation by fifth generation rotary files on the pericervical dentin thickness in mandibular molars.

Methods: 30 human mandibular molars with fully formed apices were used for this study.

Preoperative CBCT scans were made for each sample and PCD thickness was measured.

The teeth were divided into 3 groups of 10 teeth each.

Group 1: One Shape

Group 2: Protaper Next

Group 3: Revo S

Root Canal Preparation was done for all the specimens in each group.

Post instrumentation CBCT scans were made for each sample and PCD was measured.

Results: There was significant loss of PCD following root canal instrumentation with fifth generation rotary files. Highest remaining pericervical dentin thickness was found in Group III (Revo S), followed by Group I(One Shape) and Group II(Protaper Next).

Conclusion: Within the limitations of this study, it was concluded that there was significant loss of  pericervical dentin following root canal instrumentation using fifth generation rotary files. Among the three groups, Revo S showed least amount of dentin removal followed by One Shape and Protaper Next.

Keywords: Biomechanical preparation, fifth generation rotary files, pericervical dentin