再治疗过程中对牙本质根部的损伤。

Damage to root dentin during retreatment procedures.

机构信息

Department of Endodontology, Academic Centre for Dentistry Amsterdam (ACTA), Amsterdam, The Netherlands.

出版信息

J Endod. 2011 Jan;37(1):63-6. doi: 10.1016/j.joen.2010.10.002.

DOI:10.1016/j.joen.2010.10.002

PMID:21146079

Abstract

INTRODUCTION

The aim of this study was to explore the influence of retreatment procedures on the appearance of defects on the root canal walls.

METHODS

Two hundred mandibular premolars were divided into 4 groups. One group was left unprepared. The rest of the teeth were prepared with ProTaper files up to size F4 and filled with gutta-percha and AH26. One group was left filled and received no further treatments. The filling material was removed from the remaining teeth either with ProTaper retreatment files or with Hedström files. Roots were then sectioned and inspected under a microscope. Data were analyzed with the nominal regression test (α = 0.05).

RESULTS

No defects were observed in the unprepared group. Retreatment groups showed significantly more defects than the initial treatment group (P < .05).There was no difference between the appearance of defects after retreatment with Hedström files and ProTaper retreatment files. The remaining dentin thickness and level of the root did not significantly influence the appearance of defects.

CONCLUSIONS

Retreatment procedures result in more defects than initial treatment. When assessing the outcomes of endodontic retreatment, the substantial damage to the root canal walls should be considered.

摘要

简介

本研究旨在探讨再治疗程序对根管壁缺陷外观的影响。

方法

将 200 颗下颌前磨牙分为 4 组。一组不做预备。其余牙齿用 ProTaper 锉预备至 F4 号并用牙胶和 AH26 填充。一组填充后不做进一步处理。从其余牙齿中用 ProTaper 再治疗锉或 Hedström 锉去除填充材料。然后将根部分段并在显微镜下检查。使用名义回归检验（α = 0.05）分析数据。