# Pericervical Dentin Preservation: Comparative Study of Three Reciprocating Systems

## TL;DR

This study compares three dental tools to see which one preserves the most tooth structure during root canal treatments.

## Contribution

The study introduces a direct comparison of three reciprocating systems for their impact on pericervical dentin preservation.

## Key findings

- One Reci caused significantly less distal dentin wear compared to WaveOne Gold.
- No significant differences were observed in mesial, buccal, and palatal surfaces across systems.
- One Reci was found to be the most conservative system for preserving pericervical dentin.

## Abstract

Endodontic treatment aims to disinfect and shape root canals through controlled wear of their walls. Selecting the appropriate rotary system is essential for preserving pericervical dentin. To compare pericervical dentin wear produced by three reciprocating

systems (WaveOne Gold, One Reci, and Reciproc Blue).

An in vitro experimental study was conducted using 30 single-rooted premolars, randomly distributed into three groups of 10 teeth each. Tomographic evaluations were performed before and after instrumentation, measuring mesial, distal, palatal/lingual, and buccal surfaces at 4 mm from the cemento-enamel junction. The Kruskal-Wallis test was used to compare the three systems, with Dunn's post-hoc test for pairwise comparisons (significance level p<0.05).

A statistically significant difference was found in the distal sector (p=0.005), with One Reci causing the least wear (0.05±0.02mm) compared to WaveOne Gold (0.21±0.21mm). No significant differences were found in the mesial, buccal, and palatal surfaces. Conclusions: One Reci proved to be the most conservative system for pericervical dentin, suggesting that system selection can significantly impact dental structure preservation during endodontic treatment.