含有 TiO 和 SiO 纳米颗粒的自粘接复合树脂的剪切粘接强度，以及对釉质进行额外酸蚀处理以粘接正畸托槽。

Shear Bond Strength of Self-Adhesive Composite Containing TiO and SiO Nanoparticles with an Additional Etching Step for Orthodontic Brackets Bonding to Enamel.

机构信息

Dentist, Tehran, Iran.

Assistant professor, Dental research center, Dentistry research institute, and Department of Orthodontics, Dental School, Tehran University of Medical Sciences, Tehran, Iran, Tehran, Iran.

出版信息

Folia Med (Plovdiv). 2021 Dec 31;63(6):865-874. doi: 10.3897/folmed.63.e56657.

DOI:10.3897/folmed.63.e56657

PMID:35851232

Abstract

INTRODUCTION

Recently, nanoparticles such as nano-TiO2 have been added to some dental materials for enhancing dental carries prevention due to their antibacterial activity.

AIM

This study aimed to assess the shear bond strength of a self-adhesive composite containing TiO2 and SiO2 nanoparticles for orthodontic bracket bonding.

MATERIALS AND METHODS

This in vitro, experimental study was done on 70 extracted human premolars divided into 7 groups. Six groups of Vertise Flow self-adhesive composite samples were prepared: without any nanoparticles, with 0.5% and 1% TiO2 nanoparticles, 0.5% and 1% SiO2 nanoparticles, and 1% mixture of TiO2 and SiO2 nanoparticles so that nano-hybrid composites were prepared. Metal brackets were bonded with these samples as well as Transbond XT as the control group. The shear bond strength of the brackets to enamel was measured using a universal testing machine. The adhesive remnant index (ARI) score was also determined by a stereomicroscope. Data were analyzed by one-way ANOVA, Tukey's test and Kruskal-Wallis test.

RESULTS

The shear bond strength of the groups was significantly different (p=0.000). Pairwise comparisons revealed that the bond strength of Transbond XT group was significantly higher than others (p<0.05), followed by the 1% TiO2 group with significant differences with Vertise Flow and 0.5% TiO2 groups. The lowest value belonged to Vertise Flow with no nanoparticles. The ARI scores was different in the control group (p=0.000).

CONCLUSIONS

Adding TiO2 and SiO2 nanoparticles to Vertise Flow self-adhesive composite not only did not adversely affect its shear bond strength, but also slightly increased it. Overall, the self-adhesive nano-hybrid composite containing TiO2 and/or SiO2 nanoparticles, following an additional etching step would be acceptable for bracket bonding and can be used clinically to benefit from the antimicrobial activity of these nanoparticles.

摘要

简介

最近，由于纳米 TiO2 等纳米颗粒具有抗菌活性，已被添加到一些牙科材料中，以增强对龋齿的预防效果。

目的

本研究旨在评估一种含有 TiO2 和 SiO2 纳米颗粒的自粘接复合树脂用于正畸托槽粘接的剪切粘接强度。

材料和方法

这是一项体外实验研究，共纳入 70 颗离体人前磨牙，随机分为 7 组。制备了 6 组 Vertise Flow 自粘接复合树脂样本：无任何纳米颗粒、0.5%和 1%TiO2 纳米颗粒、0.5%和 1%SiO2 纳米颗粒以及 1%TiO2 和 SiO2 纳米颗粒混合物，从而制备纳米杂化复合材料。用这些样本以及 Transbond XT 作为对照组粘接金属托槽。使用万能试验机测量托槽与釉质的剪切粘接强度。还使用立体显微镜确定黏附残留指数（ARI）评分。采用单因素方差分析、Tukey 检验和 Kruskal-Wallis 检验对数据进行分析。

结果

各组的剪切粘接强度差异有统计学意义（p=0.000）。两两比较显示，Transbond XT 组的粘接强度明显高于其他组（p<0.05），其次是 1%TiO2 组，与 Vertise Flow 组和 0.5%TiO2 组差异显著。Vertise Flow 组不添加纳米颗粒的强度最低。对照组的 ARI 评分差异有统计学意义（p=0.000）。