Effect of Quaternary Ammonium Salt on Shear Bond Strength of Orthodontic Brackets to Enamel.

Journal of Dentistry of Tehran University of Medical Sciences Pub Date : 2017-05-01

Hannaneh Ghadirian, Allahyar Geramy, Farhood Najafi, Soolmaz Heidari, Hamid Golshahi

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Abstract

Objectives: This study sought to assess the effect of quaternary ammonium salt (QAS) on shear bond strength of orthodontic brackets to enamel.

Materials and methods: In this in vitro experimental study, 0, 10, 20 and 30% concentrations of QAS were added to Transbond XT primer. Brackets were bonded to 60 premolar teeth using the afore-mentioned adhesive mixtures, and the shear bond strength of the four groups (n=15) was measured using a universal testing machine. After debonding, the adhesive remnant index (ARI) score was determined under a stereomicroscope. Data were analyzed using one-way ANOVA.

Results: The mean and standard deviation of shear bond strength of the control and 10%, 20% and 30% groups were 23.54±6.31, 21.81±2.82, 20.83±8.35 and 22.91±5.66 MPa, respectively. No significant difference was noted in shear bond strength of the groups (P=0.83). Study groups were not different in terms of ARI scores (P=0.80).

Conclusions: The results showed that addition of QAS to Transbond XT primer had no adverse effect on shear bond strength of orthodontic brackets.

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季铵盐对正畸托槽与牙釉质剪切结合强度的影响。

目的:探讨季铵盐(QAS)对正畸托槽与牙釉质剪切结合强度的影响。材料与方法:体外实验研究中，在Transbond XT引物中分别添加0、10、20、30%浓度的QAS。使用上述黏合剂将托槽粘接在60颗前磨牙上，使用万能试验机测量四组(n=15)的剪切粘接强度。脱粘后，在体视显微镜下测定粘接残余指数(ARI)评分。数据分析采用单因素方差分析。结果:对照组和10%、20%、30%组抗剪强度均值和标准差分别为23.54±6.31、21.81±2.82、20.83±8.35和22.91±5.66 MPa。各组间剪切结合强度差异无统计学意义(P=0.83)。研究组在ARI评分方面没有差异(P=0.80)。结论:结果表明，在Transbond XT引物中添加QAS对正畸托槽的剪切结合强度无不良影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Journal of Dentistry of Tehran University of Medical Sciences

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24 weeks