正畸底漆在潮湿条件下的剪切-剥离粘结强度。

Shear-peel bond strength of orthodontic primers in wet conditions.

作者信息

Kula K S, Nash T D, Purk J H

机构信息

Department of Orthodontics and Dentofacial Orthopedics, University of Missouri-Kansas City, Kansas City, MO 64108, USA.

出版信息

Orthod Craniofac Res. 2003 May;6(2):96-100. doi: 10.1034/j.1600-0854.2003.c242.x.

DOI:10.1034/j.1600-0854.2003.c242.x

PMID:12809271

Abstract

OBJECTIVE

The purpose of this in vitro study was to determine whether a hydrophilic primer (Transbond MIP, [MIP]) produces a significant difference in shear/peel bond strength compared with a traditional hydrophobic primer (Transbond XT, [XT]) in wet (W) or dry (D) conditions and if there is a difference in the site of bond failure.

DESIGN

A randomized blinded in vitro design.

SETTING AND SAMPLE POPULATION

The University of Missouri-Kansas City School of Dentistry. Forty extracted human premolars were divided into four test groups (n = 10 each): MIP-dry conditions (MIPD), MIP-wet conditions (MIPW), XT-dry (XTD) and XT-wet (XTW).

EXPERIMENTAL VARIABLE

Orthodontic brackets were bonded to the teeth according to the manufacturer's directions except XTW and MIPW were exposed to moisture.

OUTCOME MEASURE

Shear/peel test 24 h after bonding using an Instron at a crosshead speed of 0.5 mm/min and the adhesive remnant index to determine the site of bond failure.

RESULTS

The bond strengths (X +/- SD) in MPa were XTD = 8.3 +/- 2.3; XTW = 0.8 +/- 0.7; MIPD = 7.5 +/- 1.8 and MIPW = 7.9 +/- 1.7. The shear/peel bond strengths were significantly different: XTD = MIPD = MIPW > XTW (p < or = 0.01; two-way ANOVA; Tukey HSD). The ARI scores were also significantly different: XTD = MIPD = MIPW > XTW (p < or = 0.01; Chi-square).

CONCLUSIONS

Orthodontists who suspect moisture contamination should use a hydrophilic primer during bonding procedures to maintain shear/peel bond strength.

摘要

目的

本体外研究的目的是确定在湿（W）或干（D）条件下，亲水性底漆（Transbond MIP，[MIP]）与传统疏水性底漆（Transbond XT，[XT]）相比，在剪切/剥离粘结强度上是否产生显著差异，以及粘结失败部位是否存在差异。

设计

随机双盲体外设计。

设置和样本群体

密苏里大学堪萨斯城牙科学院。40颗拔除的人类前磨牙被分为四个测试组（每组n = 10）：MIP - 干燥条件（MIPD）、MIP - 潮湿条件（MIPW）、XT - 干燥（XTD）和XT - 潮湿（XTW）。

实验变量

正畸托槽按照制造商的说明粘结到牙齿上，除了XTW和MIPW暴露于湿气中。

观察指标

粘结24小时后使用Instron以0.5mm/min的十字头速度进行剪切/剥离测试，并使用粘结剂残留指数确定粘结失败部位。

结果

以MPa为单位的粘结强度（X +/- SD）为：XTD = 8.3 +/- 2.3；XTW = 0.8 +/- 0.7；MIPD = 7.5 +/- 1.8和MIPW = 7.9 +/- 1.7。剪切/剥离粘结强度有显著差异：XTD = MIPD = MIPW > XTW（p≤0.01；双向方差分析；Tukey HSD）。ARI评分也有显著差异：XTD = MIPD = MIPW > XTW（p≤0.01；卡方检验）。