Evaluation Of Remaining Dentin Thickness in Mandibular Molars’ Mesial Roots After Removal of Separated Instruments Using Traditional and Conservative Techniques: In-Vitro Study

Document Type : Original Article

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Department of Endodontics, Faculty of Oral and Dental Medicine, Misr International University, KM 28 Cairo – Ismailia Road Ahmed Orabi District, Cairo – Egypt

Abstract

The aim of this study was to assess whether fractured files retrieval using Terauchi file retrieval technique (TFRT) provided a more conservating method than using the technique described by Ruddle. Extracted human mandibular molars were randomly allocated and divided into three groups (n=10): Ruddle’s technique with an E25, E40 US tips and TFRT, then the teeth were decoronated. Preoperative CBCT imaging was done, Hyflex EDM files were intentionally fractured in the middle third and retrieved using the allocated technique. The mesial roots were cleaned, shaped and obturated and postoperative CBCT imaging was done. Remaining dentin thickness (measured in mm) was calculated by measuring the difference in dentin thickness from the wall of the canal to the root’s outer surface in four directions (buccal, lingual, mesial and distal) pre and post file retrieval. Results showed a statistically significant difference between the three studied techniques at 3 mm root level. Based on our study results, fractured file retrieval using TFRT provides a more conservative approach to retrieving fractured files.

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Egyptian Dental Journal
Volume 71, Issue 2 - Serial Number 5
January (Conservative Dentistry and Endodontics)
April 2025
Pages 1697-1704

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