不同处理方法对托槽再黏结强度的影响

上海口腔医学 ›› 2015, Vol. 24 ›› Issue (3): 307-310.

不同处理方法对托槽再黏结强度的影响

吴海苗¹,赵丙姣¹,陈栋²

1.上海市口腔病防治院口腔正畸科,上海 200031;
2. 上海市口腔病防治院口腔内科,上海 200031

收稿日期:2015-01-07 出版日期:2015-06-20 发布日期:2015-07-24
通讯作者: 陈栋,Tel:021-63298475,Fax:021-63614515,E-mail:chendong19690124@126.com
作者简介:吴海苗(1975-),女,硕士,副主任医师,E-mail:wuhaimiao0805@126.com

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

WU Hai-miao¹,ZHAO Bin-jiao¹,CHEN Dong²

1.Department of Orthodontology, Shanghai Stomatological Disease Center. Shanghai 200031, China;
2.Department of Oral Medicine, Shanghai Stomatological Disease Center. Shanghai 200031, China

Received:2015-01-07 Online:2015-06-20 Published:2015-07-24

摘要/Abstract

摘要： 目的:比较不同处理方法对金属托槽再黏结强度的影响。方法:选择40颗离体前磨牙为实验对象,随机分为4组。粘结托槽后,选择3组剥离托槽,采用磨除、烧灼、喷砂3种不同托槽底板处理后予以再次黏结,经体外pH循环30 d后,测定托槽的抗剪切强度。采用SPSS 13.0软件包对所得数据进行单因素方差分析。另选取试样通过扫描电镜观察托槽底板的形态及结构。结果:4组间有显著差异,托槽烧灼再黏结组与其他各组间有显著差异,其余各组两两相比,均无显著性差异。结论:托槽底板残留黏结剂经磨除或喷砂处理,可获得与初次黏结相近的黏结强度。

关键词: 托槽再黏结, 抗剪切强度, 扫描电镜

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.

Key words: Bracket rebonded, Shear bond strength, Scanning electron microscope

中图分类号:

R783.5

吴海苗,赵丙姣,陈栋. 不同处理方法对托槽再黏结强度的影响[J]. 上海口腔医学, 2015, 24(3): 307-310.

WU Hai-miao,ZHAO Bin-jiao,CHEN Dong. Effects of different resin removal methods on shear bond strength of rebonded orthodontic brackets[J]. Shanghai Journal of Stomatology, 2015, 24(3): 307-310.

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