[不同树脂去除方法对重新粘结正畸托槽剪切粘结强度的影响]

[Effects of different resin removal methods on shear bond strength of rebonded orthodontic brackets].

作者信息

Wu Hai-miao, Zhao Bin-jiao, Chen Dong

机构信息

Department of Orthodontology, Shanghai Stomatological Disease Center. Shanghai 200031, China. E-mail:

出版信息

Shanghai Kou Qiang Yi Xue. 2015 Jun;24(3):307-10.

PMID:26166518

Abstract

PURPOSE

To compare the shear bond strength (SBS) of rebonded orthodontic metal brackets with different resin removal methods.

METHODS

Forty extracted premolars were chosen as samples and divided into 4 experimental groups. The teeth were bonded with brackets. The brackets from 3 groups were debonded while adhesive remnants were removed from bracket bases by methods of grinding, sandblasting, and direct flaming, respectively and then rebonded. The SBS values of all rebonded brackets were determined after pH cycling experiment for 30 days. Some rebonded bracket bases were selected and observed under scanning electron microscope (SEM). The data was analyzed by one-way ANOVA test using SPSS 13.0 software package.

RESULTS

Statistical analysis revealed a significant difference of SBS values among the 4 experimental groups (P<0.05). The SBS values of the group by direct flaming was significantly lower compared to the other groups (P<0.05). There was no significant difference of SBS values among the other groups.

CONCLUSIONS

The rebonded brackets after resin removal by grinding and sandblasting have a similar SBS compared to the initial brackets adhesive.

摘要

目的

比较采用不同树脂去除方法重新粘结的正畸金属托槽的剪切粘结强度（SBS）。

方法

选取40颗拔除的前磨牙作为样本，分为4个实验组。将托槽粘结于牙齿上。其中3组的托槽脱粘后，分别采用打磨、喷砂和直接灼烧的方法去除托槽底座上的粘结剂残余物，然后重新粘结。在进行30天的pH循环试验后，测定所有重新粘结托槽的SBS值。选取部分重新粘结的托槽底座，在扫描电子显微镜（SEM）下观察。使用SPSS 13.0软件包通过单因素方差分析对数据进行分析。