Effect of various surface protections on the margin microleakage of resin-modified glass ionomer cements.
Effect of various surface protections on the margin microleakage of resin-modified glass ionomer cements.
复制标题
各种表面保护对树脂改性玻璃离子水门汀边缘微渗漏的影响。
DOI：
10.1067/mpr.2001.116133
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
T. Wong
中科院分区：
文献类型：
--
作者：
S. Chuang;Y. T. Jin;P. Tsai;T. Wong
问题声明
由于传统玻璃离子水门汀对水分敏感，建议在初始凝固阶段进行表面涂层。目前尚不清楚树脂改性玻璃离子水门汀是否也需要表面保护。
目的
本研究探讨了不同表面保护对V类树脂改性玻璃离子充填体微渗漏的影响。
材料和方法
40个拔除的磨牙，颊侧和舌侧的V类洞准备恢复树脂改性玻璃离子（富士II LC）。每个修复体的咬合边缘位于釉质上，颈部边缘位于牙本质上。在即刻修整和抛光后，根据以下表面保护处理将牙齿分为4组：I组，未保护; II组，富士清漆; III组，树脂粘合剂; IV组，酸蚀和树脂粘合剂。在这些程序之后，将所有牙齿储存在等渗盐水中24小时，在5摄氏度至60摄氏度下热循环1500次，并在染料溶液中浸泡24小时。然后将牙齿纵向切片并在立体显微镜下观察。记录染料渗透程度，并采用Kruskal-Wallis和Mann-Whitney检验进行分析（P<0.05）。
结果
4组中没有一组在咬合或颈部边缘显示出完全的边缘封闭。第II组和第III组的宫颈边缘微渗漏最少;第I组和第III组之间存在显著差异（P= 0.034）。与其他3组相比，第IV组在宫颈边缘显示出显著更大的微渗漏。
结论
虽然树脂改性的玻璃离聚物可以立即完成，但它们仍然对水分敏感。在本研究的范围内，结果表明，树脂粘合剂应作为一种表面保护，以减少边缘微渗漏的树脂改性玻璃离子牙列。
STATEMENT OF PROBLEM
Because conventional glass ionomer cements are moisture sensitive, a surface coating is recommended during the initial setting stage. It is unknown whether resin-modified glass ionomer cements also need surface protection.
PURPOSE
This study investigated the effect of various surface protections on microleakage with Class V resin-modified glass ionomer restorations.
MATERIAL AND METHODS
Forty extracted molars with buccal and lingual Class V cavity preparations were restored with a resin-modified glass ionomer (Fuji II LC). The occlusal margin of each restoration was on enamel and the cervical margin on dentin. After immediate finishing and polishing, the teeth were divided into 4 groups according to the following surface protection treatments: group I, unprotected; group II, Fuji varnish; group III, resin adhesive; and group IV, acid etching and resin adhesive. After these procedures, all teeth were stored in isotonic saline for 24 hours, thermocycled 1500 times at 5 degrees C to 60 degrees C, and soaked in dye solution for 24 hours. The teeth then were longitudinally sectioned and observed under a stereomicroscope. The degree of dye penetration was recorded and analyzed with the Kruskal-Wallis and Mann-Whitney tests (P<.05)
RESULTS
None of the 4 groups demonstrated complete margin sealing at either the occlusal or cervical margins. Groups II and III displayed the least microleakage at cervical margins; a significant difference existed between groups I and III (P=.034). Compared with the other 3 groups, group IV showed significantly greater microleakage at the cervical margins.
CONCLUSION
Although resin-modified glass ionomers can be finished immediately, they remain moisture sensitive. Within the limitations of this study, the results suggest that resin adhesive should be used as a surface protection to reduce margin microleakage of resin-modified glass ionomer restorations.