XP-endo成型器和Mtwo器械在长椭圆形根管中的成型效率：一项显微CT研究。

Shaping efficiency of XP-endo shaper and Mtwo instruments in long oval root canals: A micro-CT study.

作者信息

Marques Juliana Lisboa Couto, Freire Laila Gonzales, Scardini Iandara de Lima, Vieira Basilio Rodrigues, de Sousa Frederico Barbosa, Dos Santos Marcelo

机构信息

Department of Restorative Dentistry, Faculty of Dentistry, University of São Paulo (USP), Sao Paulo, Brazil.

Department of Morphology, Health Science Center, Federal University of Paraíba, Paraíba, Brazil.

出版信息

Aust Endod J. 2021 Dec;47(3):624-630. doi: 10.1111/aej.12533. Epub 2021 Jun 7.

DOI:10.1111/aej.12533

PMID:34097325

Abstract

This study evaluated the shaping ability of XP-endo Shaper and Mtwo systems in long-oval-shaped canals of extracted human mandibular molars using micro-computed tomography (micro-CT). Images recorded before and after preparation were evaluated for morphometric measures regarding increase in canal volume, dentin removed, surface area, untouched walls and structure model index (SMI). Data were statistically analysed using the Mann-Whitney test with 5% of significance. On both groups, the root canal preparation significantly increased all analysed parameters (P > 0.05). There was no statistical difference between XP-endo Shaper and Mtwo systems in the increase of the canal volume (30.50%-27.82%), in volume of dentin removed (2.77%-2.40%), in the increase of the canal surface area (11.30%-8.86%), in canal untouched surfaces (9.57%-8.51%) and in the SMI (2.59%-2.68%), respectively. XP-endo Shaper and Mtwo systems showed similar shaping efficiency and were not able to completely prepare the walls of long-oval-shaped canals of extracted human mandibular molars.

摘要

本研究使用微型计算机断层扫描（显微CT）评估了XP-endo Shaper系统和Mtwo系统对拔除的人类下颌磨牙长椭圆形根管的塑形能力。对预备前后记录的图像进行形态学测量评估，包括根管容积增加、牙本质去除量、表面积、未触及壁和结构模型指数（SMI）。使用曼-惠特尼检验对数据进行统计学分析，显著性水平为5%。在两组中，根管预备均显著增加了所有分析参数（P＞0.05）。XP-endo Shaper系统和Mtwo系统在根管容积增加（30.50%-27.82%）、牙本质去除量（2.77%-2.40%）、根管表面积增加（11.30%-8.86%）、根管未触及表面（9.57%-8.51%）和SMI（2.59%-2.68%）方面均无统计学差异。XP-endo Shaper系统和Mtwo系统显示出相似的塑形效率，并且无法完全预备拔除的人类下颌磨牙长椭圆形根管的壁。