Comparison of peri-cervical dentin on conservative and conventional access cavity designs with waveone gold and hyflex electrical discharge machining instrumentation using cone-beam computed tomography - An in vitro study.

Abstract

Background and aim: Successful endodontic therapy depends on multiple factors, with root canal preparation being a critical step in the process. Maintaining the natural anatomy of the root canal system during biomechanical preparation is important. Deviation from the canal's original morphology can lead to complications, such as canal aberrations, including transportation. Proper attention to canal preparation techniques and advanced file systems can help preserve the canal's natural curvature, ensuring effective treatment and reducing the possibility of errors in procedure. This research compares and assesses the effects of two single-file systems, waveone gold and hyflex electrical discharge machining (EDM), through the use of cone-beam computed tomography (CBCT) on peri-cervical dentin (PCD).

Materials and methods: Forty mandibular molar teeth that were extracted were selected and prepared using both rotary and reciprocating single-file systems. The teeth were grouped into four categories with each containing ten teeth. CBCT scans were performed before and following the instrumentation to assess the remaining PCD thickness. An independent t-test with a 5% significance level was used to evaluate the data.

Results: The findings indicated that the two systems differed statistically significantly, with the rotary system preserving more PCD (2.57 ± 0.03 mm) than the reciprocating system (2.45 ± 0.04 mm).

Conclusion: The study results indicated that the Hyflex EDM single file system proved to be more effective in preserving PCD. However, additional studies are required to thoroughly assess the impact of Ni-Ti rotary single file systems on remaining dentin thickness.