使用次氯酸钠储存对树脂-牙本质粘结的降解作用。

Degradation of resin-dentin bonds using NaOCl storage.

作者信息

Yamauti M, Hashimoto M, Sano H, Ohno H, Carvalho R M, Kaga M, Tagami J, Oguchi H, Kubota M

机构信息

Department of Operative Dentistry, Bauru School of Dentistry, University of, São Paulo, SP, Brazil.

出版信息

Dent Mater. 2003 Jul;19(5):399-405. doi: 10.1016/s0109-5641(02)00083-0.

DOI:10.1016/s0109-5641(02)00083-0

PMID:12742435

Abstract

OBJECTIVE

Several recent studies have reported collagen hydrolysis within bonds over the long-term. This may be one reason for the degradation of the bonds. This study therefore aimed to determine the effects of NaOCl on adhesive system bonds (total-etch bonding system vs. self-etching primer system) to dentin in order to accelerate the durability testing.

METHODS

Resin-dentin bonded specimens were produced using Liner Bond 2V (Kuraray), a self-etching primer system, and OptiBond SOLO (Kerr), a total-etch bonding system, according to the manufacturers' instructions. The bonded specimens were serially sectioned in both x and y directions across the adhesive interface to obtain beams (adhesive area: 0.9 mm(2)). The specimens were immersed in 10% NaOCl solution for 1-5h after being stored in water at 37 degrees C for 24h. Control specimens were tested without exposure to NaOCl. After storage, micro-tensile bond tests were performed. Results were analyzed by two-way ANOVA and Fisher's PLSD tests (p<0.05). All fractured surfaces were observed by SEM, and examined using an image analyzer.

RESULTS

The bond strengths decreased with increasing storage time in NaOCl. Fractography showed that NaOCl had a greater effect on the bond structure of OptiBond SOLO than on that of Liner Bond 2V, although both adhesives were susceptible.

SIGNIFICANCE

Deterioration of the bonds was responsible for the effect of NaOCl on the hybrid layer. This deterioration may occur in humans in cases of deproteinization within the bonds.

摘要

目的

近期多项研究报道了长期内胶原在键内的水解情况。这可能是键降解的原因之一。因此，本研究旨在确定次氯酸钠（NaOCl）对牙本质粘结系统（全酸蚀粘结系统与自酸蚀底漆系统）粘结强度的影响，以加速耐久性测试。

方法

根据制造商的说明，使用自酸蚀底漆系统的Liner Bond 2V（可乐丽公司）和全酸蚀粘结系统的OptiBond SOLO（克尔公司）制备树脂 - 牙本质粘结标本。在粘结标本沿粘结界面在x和y方向上连续切片以获得梁（粘结面积：0.9平方毫米）。将标本在37℃水中储存24小时后，浸入10%的NaOCl溶液中1 - 5小时。对照标本不暴露于NaOCl进行测试。储存后，进行微拉伸粘结测试。结果通过双向方差分析和Fisher's PLSD检验进行分析（p<0.05）。所有断裂表面通过扫描电子显微镜观察，并使用图像分析仪进行检查。