Comparative Evaluation of the Efficiency in Retrieving Separated Reciprocating Instruments Using Three Different File Retrieval Systems in Maxillary First Molars: An In Vitro Study.

AIM: The aim of this study was to compare and evaluate the retrieval time, efficiency, and loss of dentin volume after separated instrument retrieval using three different file retrieval systems in the middle and apical thirds of the mesio-buccal root of maxillary first molars. MATERIAL AND METHODS: Sixty maxillary first molars were selected. Group 1: Endo Rescue Apex, Group 2: Ultrasound apex, Group 3: Broken instrument remover apex, Group 4: Endo Rescue Middle, Group 5: Ultrasound Middle, Group 6: Broken instrument Remover middle were used to retrieve the fractured reciprocating files from the root canals. RESULTS: The results showed that the BTR pen system was successful in removing the majority of the files, with success rates of 60%. The BTR-Pen system achieved a 30% success rate, successfully removing 3 separated instruments from the middle third under a dental operating microscope within the time span. According to the statistical analysis of the dentinal thickness lost during retrieval of separated reciprocating instruments, BTR pens showed less amount of dentine loss than the ultrasonic and Endo rescue. CONCLUSION: The findings may guide further research on BTR's effectiveness in retrieving separated instruments, with additional clinical trials ongoing.