Gajjela Rani Samyukta, Satish R Kalyan, Sajjan Girija S, Varma K Madhu, Rambabu T, Vijaya Lakshmi B H
Department of Conservative Dentistry and Endodontics, Vishnu Dental College, West Godavari District, Andhra Pradesh, India.
J Conserv Dent. 2017 Mar-Apr;20(2):120-124. doi: 10.4103/0972-0707.212241.
The purpose of this study was to evaluate the influence of chlorhexidine (CHX), grape seed extract (GSE), riboflavin/chitosan modification on microtensile bond strength (μTBS) of composite resin to dentin after polymerase chain reaction (PCR) thermocycling.
Forty extracted human molars were used and a flat surface was then prepared by removing the occlusal one-third. The teeth were randomly assigned into four groups - Group I in which self-etch adhesive (Adper Easy One) was applied and Groups II, III, IV were pretreated with 2% CHX, 6.5% GSE, and 1% riboflavin/chitosan, respectively, before the application of self-etch adhesive. Composite build-ups were constructed, and PCR thermocycling (5000 cycles) was performed. The μTBS was evaluated using the universal testing machine. Data were analyzed using one-way analysis of variance and Tukey's test.
The mean μTBS values for Group I (control), Group II (CHX), Group III (GSE), and Group IV (riboflavin/chitosan modification) were 30.81, 43.15, 38.79, and 35.07 MPa, respectively.
Pretreatment with CHX and GSE leads to a significant increase in μTBS of composite resin to dentin.
本研究旨在评估洗必泰（CHX）、葡萄籽提取物（GSE）、核黄素/壳聚糖修饰对聚合酶链反应（PCR）热循环后复合树脂与牙本质微拉伸粘结强度（μTBS）的影响。
使用40颗拔除的人类磨牙，去除咬合面三分之一制备平面。将牙齿随机分为四组——第一组应用自酸蚀粘结剂（Adper Easy One），第二、三、四组在应用自酸蚀粘结剂前分别用2% CHX、6.5% GSE和1%核黄素/壳聚糖预处理。构建复合树脂堆积体，并进行PCR热循环（5000次循环）。使用万能试验机评估μTBS。数据采用单因素方差分析和Tukey检验进行分析。
第一组（对照组）、第二组（CHX）、第三组（GSE）和第四组（核黄素/壳聚糖修饰）的平均μTBS值分别为30.81、43.15、38.79和35.07 MPa。
CHX和GSE预处理可显著提高复合树脂与牙本质的μTBS。
