被动超声冲洗后用三种根管封闭剂充填的上颌前磨牙的牙根抗折性：一项研究。

Root Fracture Resistance of Maxillary Premolars Obturated with Three Root Canal Sealers after Passive Utrasonic Irrigation: An study.

作者信息

Merçon Ivy Rodrigues, da Silveira Bueno Carlos Eduardo, Rocha Daniel Guimarães Pedro, Fontana Carlos Eduardo, Pais Andressa Salles Gonçalves, De Martin Alexandre Sigrist

机构信息

Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Endodontia. R. Dr. José Rocha Junqueira, Brazil.

School of Dentistry, Pontifícia Universidade Católica de Campinas (PUC-Campinas), Rua Professor Dr. Euryclides de Jesus Zerbini, Brazil.

出版信息

Iran Endod J. 2020 Summer;15(3):166-172. doi: 10.22037/iej.v15i3.26426.

DOI:10.22037/iej.v15i3.26426

PMID:36703808

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9709848/

Abstract

INTRODUCTION

Maxillary premolars, may be more susceptible to fracture due to their anatomy; especially when there is loss of tooth structure. Therefore, it is necessary to evaluate materials and techniques that may increase fracture resistance during and post root canal treatment. This study aimed to evaluate root fracture resistance of maxillary premolars when filled with three root canal sealers as well as whether this resistance would be increased by passive ultrasonic irrigation (PUI).

METHODS AND MATERIALS

Sixty-four maxillary premolars with two roots were randomly divided into one negative control group (intact canals; = 8), one positive control group (instrumented, unsealed canals; = 8), and six experimental groups ( = 8), which were instrumented with ProTaper Next rotary system up to X2 file and subdivided according to final irrigation (with or without PUI) and type of sealer used (AH-Plus [AH], MTA Fillapex [MTA], or EndoSequence BC Sealer [ES]). The specimens were subjected to fracture strength test in a universal testing machine at a speed of 1 mm/min until fracture. The maximum force required to induce fracture was recorded (N). The Kruskal-Wallis test and DUNN test were used for analysis.

RESULTS

The lowest force required to cause root fracture was observed in the positive control group (310.48 ± 54.08 N); this was significantly different from the other groups (< 0.05). There was no significant difference between experimental groups obturated with the same sealer, whether with or without PUI (AH with PUI: 558.80 ± 87.12 N; AH without PUI: 508.75 ± 97.55 N; MTA with PUI: 507.27 ± 174.55 N; MTA without PUI: 516.69 ± 96.56 N; ES with PUI: 526.76 ± 143.97 N; ES without PUI: 628.40 ± 94.74 N) (> 0.05). There was also no significant difference between the experimental groups and the negative control group ( > 0.05).

CONCLUSIONS

In this in vitro study PUI did not increase the fracture resistance of maxillary premolars, while AH Plus, MTA Fillapex, EndoSequence sealers increased fracture resistance of instrumented root canals.

摘要

引言

上颌前磨牙因其解剖结构，可能更易发生骨折；尤其是在牙体组织丧失时。因此，有必要评估在根管治疗期间及之后可能增加抗折性的材料和技术。本研究旨在评估用三种根管封闭剂充填时上颌前磨牙的牙根抗折性，以及被动超声冲洗（PUI）是否会增加这种抗折性。

方法和材料

将64颗有两个牙根的上颌前磨牙随机分为一个阴性对照组（根管完整；n = 8）、一个阳性对照组（预备后未封闭根管；n = 8）和六个实验组（n = 8），用ProTaper Next旋转系统预备至X2锉，并根据最终冲洗（有无PUI）和所用封闭剂类型（AH-Plus [AH]、MTA Fillapex [MTA]或EndoSequence BC封闭剂[ES]）进行细分。将标本在万能试验机上以1 mm/min的速度进行抗折强度测试，直至骨折。记录导致骨折所需的最大力（N）。采用Kruskal-Wallis检验和DUNN检验进行分析。

结果

阳性对照组观察到导致牙根骨折所需的力最低（310.48±54.08 N）；这与其他组有显著差异（<0.05）。用相同封闭剂充填的实验组之间，无论有无PUI，均无显著差异（AH加PUI：558.80±87.12 N；AH不加PUI：508.75±97.55 N；MTA加PUI：507.27±174.55 N；MTA不加PUI：516.69±96.56 N；ES加PUI：526.76±143.97 N；ES不加PUI：628.40±94.74 N）（>0.05）。实验组与阴性对照组之间也无显著差异（>0.05）。