经抗坏血酸处理后，牙本质脱蛋白导致的结合强度降低得到恢复。

Compromised bond strength after root dentin deproteinization reversed with ascorbic acid.

机构信息

Department of Operative Dentistry, Endodontics, and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil.

出版信息

J Endod. 2010 Jan;36(1):130-4. doi: 10.1016/j.joen.2009.09.008.

DOI:10.1016/j.joen.2009.09.008

PMID:20003951

Abstract

INTRODUCTION

The present study evaluated the effect of a reducing agent on the bond strength of deproteinized root canal dentin surfaces when using a self-adhesive versus dual-cured cement. Regional differences were also evaluated.

METHODS

A total of 45 bovine incisor roots were divided into 3 groups: irrigation with physiologic solution (control), 10-minute deproteinization with 5% NaOCl, and 10-minute deproteinization with 5% NaOCl followed by 10 minutes of 10% ascorbic acid. Fiber posts were cemented with either RelyX U100 or RelyX ARC (with SingleBond 2 or Clearfil SE Bond). The push-out bond strength was evaluated after 24 hours of storage. Data were submitted to three-way analyses of variance and Dunnett T3 tests (alpha = 0.05).

RESULTS

No differences between cements were observed within the testing conditions, regardless of the adhesive (P < .05). Deproteinization reduced bond strengths. Subsequent treatment with ascorbic acid was capable of reversing bond strength value changes to levels similar to those of controls. Regional radicular differences were also found, where coronal > middle > apical.

CONCLUSIONS

The reducing agent was capable of reversing the effect of dentin deproteinization, and RelyX U100 behaved similarly to RelyX ARC.

摘要

简介

本研究评估了还原剂对使用自粘接与双固化水泥时脱蛋白根管牙本质表面粘结强度的影响。还评估了区域差异。

方法

共 45 个牛切牙牙根分为 3 组：生理盐水冲洗（对照组）、5%次氯酸钠 10 分钟脱蛋白、5%次氯酸钠 10 分钟脱蛋白后 10 分钟 10%抗坏血酸。纤维桩用 RelyX U100 或 RelyX ARC（用 SingleBond 2 或 Clearfil SE Bond）粘结。在储存 24 小时后评估推出粘结强度。数据进行三因素方差分析和 Dunnett T3 检验（alpha = 0.05）。