Effect of Cavity Designs on Instrumentation, Obturation, and Fracture Resistance of Mandibular First Premolars With Vertucci V Canal

IF 3.5 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of endodontics Pub Date : 2025-04-01 DOI:10.1016/j.joen.2024.12.014

Yuxuan Liu DDS, Yi Luo DDS, Yaxu Feng DDS, Xianhua Gao DDS, Wei Fan DDS, PhD, Bing Fan DDS, MSc, PhD

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引用次数: 0

Abstract

Introduction

This study aimed to assess the effect of cavity designs on instrumentation, obturation and fracture resistance for mandibular first premolars with Vertucci V canal.

Methods

Mandibular first premolars with Vertucci V canal were scanned with microcomputed tomography. A total of 20 teeth with moderately curved canal were prepared with conservative endodontic cavity (CEC/M) or traditional endodontic cavity (TEC/M), and 30 with severely curved canal were prepared with CEC (CEC/S), modified CEC (MCEC/S) or TEC (TEC/S). CECs and MCEC were prepared using dynamic navigation systems. TECs were prepared freehand. Canals were prepared with WaveOne Gold, irrigated and then obturated with single-cone technique using iRoot SP sealer and WaveOne Gold gutta-percha cones. After restoration, all teeth were submitted to fracture resistance test. Removal of pericervical dentin, volume of dentin removal, area of untouched canal wall, accumulated hard tissue debris, centering ability, voids in canal filling, and load at fracture were evaluated.

Results

MCEC and CEC groups preserved more pericervical dentin above the alveolar bone level and more fracture resistance than TEC groups. At 3 mm from apical foramen, lower centering ability in mesiodistal direction was found in buccal canal of CEC/S group. More voids were found in the lingual canal for CEC/S compared with TEC/S (P < .05).

Conclusions

CEC and MCEC prepared with dynamic navigation system could preserve more dentin above the alveolar bone and fracture resistance than TEC prepared freehand. For teeth with severely curved V canal, MCEC showed similar ability in instrumentation and obturation as TEC.

查看原文本刊更多论文

腔体设计对带Vertucci V管的下颌第一前磨牙内固定、封闭及抗骨折的影响。

简介：本研究旨在评估腔体设计对带Vertucci V管的下颌第一前磨牙内固定、封闭和抗骨折的影响。方法：对下颌第一前磨牙进行微ct扫描。中等弯曲根管的20颗牙采用保守型根管腔（CEC/M）或传统型根管腔（TEC/M）制备，严重弯曲根管的30颗牙采用CEC （CEC/S）、改良型CEC （MCEC/S）或TEC （TEC/S）制备。采用动态导航系统制备cec和MCEC。tec是徒手准备的。用WaveOne Gold制备管体，冲洗后使用iRoot SP密封剂和WaveOne Gold胶胶锥进行单锥技术封闭。修复后所有牙进行抗断裂试验。评估颈周牙本质（PCD）去除量、牙本质去除量、未触及管壁面积、累积硬组织碎片、定心能力、管填充空隙和骨折负荷。结果：与TEC组相比，MCEC组和CEC组在牙槽骨水平以上保留了更多的PCD，且具有更强的抗骨折能力。在距根尖孔3mm处，CEC/S组颊管中、远端定心能力较差。结论：动态导航系统制备的CEC和MCEC比徒手制备的TEC更能保留牙槽骨以上的牙本质，抗骨折能力更强。对于V管严重弯曲的牙，MCEC在内固定和封闭方面的能力与TEC相似。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of endodontics 医学-牙科与口腔外科

CiteScore

8.80

自引率

9.50%

发文量

224

审稿时长

42 days

期刊介绍： The Journal of Endodontics, the official journal of the American Association of Endodontists, publishes scientific articles, case reports and comparison studies evaluating materials and methods of pulp conservation and endodontic treatment. Endodontists and general dentists can learn about new concepts in root canal treatment and the latest advances in techniques and instrumentation in the one journal that helps them keep pace with rapid changes in this field.