表面封闭剂对 V 类树脂复合修复体边缘微渗漏的影响。

Effect of surface sealants on marginal microleakage in Class V resin composite restorations.

机构信息

Department of Restorative Dentistry, School of Dentistry and Research Center São Leopoldo Mandic Research Centre, Campinas, SP, Brazil.

出版信息

J Esthet Restor Dent. 2009;21(6):397-404. doi: 10.1111/j.1708-8240.2009.00297.x.

DOI:10.1111/j.1708-8240.2009.00297.x

PMID:20002927

Abstract

PURPOSE

Surface sealants may reduce or avoid problems related to the marginal interface. The aim of this study was to evaluate the microleakage in resin composite Class V restorations sealed with an adhesive system (Xeno III [Dentsply, Konstanz, Germany]), a sealant for exposed dentin (Seal & Protect [Dentsply]), and two surface sealants (Fortify [Bisco, Lombard, IL, USA]; Optiguard [Kerr, Orange, CA, USA]).

MATERIALS AND METHODS

Fifty cavities with margins in enamel were prepared on crowns of bovine teeth and restored with an adhesive system (Prime and Bond NT/Dentsply) and resin composite (Esthet X/Dentsply). They were separated into four groups for the application of the surface sealants, and a control group (without surface sealing). Thermal cycling with baths of 5 degrees C +/- 2 degrees C and 55 degrees C +/- 2 degrees C were performed in 600 cycles. The teeth were made impermeable, except for a 3-mm window around the restoration and immersed in a 50% silver nitrate solution for 8 hours. The crown was sectioned longitudinally and the cuts were analyzed by three independent evaluators, using a stereoscopic loupe with 10x magnification that attributed representative scores. Agreement among the examiners was evaluated by the Kappa test.

RESULTS

The Kruskal-Wallis test and Dunn Method showed that there was significant difference between the Control and Seal & Protect groups. The Seal & Protect group presented the lowest degree of microleakage, followed by the Optiguard and Xeno III groups. The highest scores were obtained in the Control group.

CONCLUSION

The sealant materials evaluated presented different rates of effectiveness, and Seal & Protect was the most effective in decreasing the degree of marginal microleakage. CLINICAL SIGNIFICANCE Although surface sealants or covering agents have been used to diminish microleakage, they may present different rates of effectiveness with regard to reducing the degree of marginal leakage. (J Esthet Restor Dent 21:397-406, 2009).

摘要

目的

表面密封剂可以减少或避免与边缘界面相关的问题。本研究的目的是评估用一种粘接系统（Xeno III [Dentsply，康斯坦茨，德国]）、一种暴露牙本质密封剂（Seal & Protect [Dentsply]）和两种表面密封剂（Fortify [Bisco，朗伯德，IL，美国]；Optiguard [Kerr，奥兰治，CA，美国]）对树脂复合材料 V 类修复体进行密封后的微渗漏。

材料和方法

在牛牙的牙冠上制备了 50 个边缘在釉质的窝洞，并使用粘接系统（Prime and Bond NT/Dentsply）和树脂复合材料（Esthet X/Dentsply）进行修复。它们被分为四组，分别应用表面密封剂，并设一个对照组（不进行表面密封）。在 600 个循环中，用 5°C±2°C和 55°C±2°C的浴进行热循环。除了修复体周围 3mm 的窗口外，牙齿都是不透水的，并在 50%硝酸银溶液中浸泡 8 小时。牙冠被纵向剖分，用放大 10 倍的立体显微镜对切割面进行分析，由三位独立评估者赋予代表性评分。评估者之间的一致性用 Kappa 检验进行评估。