Olmez A, Oztaş N, Bilici S
Department of Pedodontics, Gazi University, Faculty of Dentistry, Ankara, Turkey.
Quintessence Int. 1998 Nov;29(11):725-9.
The purpose of this study was to evaluate the effects of glass-ceramic inserts and different application techniques of resin composites on marginal leakage.
Three groups of 10 standardized, round, Class V cavities were prepared on the buccal surface of 30 extracted human molar teeth. Group 1 received resin composite restorations, placed in one increment (bulk). Group 2 received resin composite restorations that were placed in two increments, and group 3 received resin composite restorations with beta-quartz ceramic inserts. After the teeth were thermocycled and placed in 0.5% basic fuchsin for 24 hours, they were sectioned and examined for microleakage.
On the occlusal margins, there was no statistically significant difference between the restorations placed with the incremental technique and the restorations with beta-quartz inserts. The restorations placed with the bulk technique had significantly more microleakage than did the others. On the gingival margins, the restorations with beta-quartz inserts exhibited significantly less microleakage than did the other groups. The restorations placed with the bulk technique showed significantly more dye penetration than did the others.
The use of a glass-ceramic insert reduced the marginal leakage of Class V resin composite restorations.
本研究旨在评估玻璃陶瓷嵌体及树脂复合材料不同应用技术对边缘渗漏的影响。
在30颗拔除的人磨牙颊面制备三组，每组10个标准化圆形Ⅴ类洞。第1组接受一次性（整块）放置的树脂复合材料修复体。第2组接受分两次放置的树脂复合材料修复体，第3组接受带有β-石英陶瓷嵌体的树脂复合材料修复体。牙齿经热循环处理并置于0.5%碱性品红中24小时后，进行切片并检查微渗漏情况。
在咬合边缘，采用分层技术放置的修复体与带有β-石英嵌体的修复体之间无统计学显著差异。整块技术放置的修复体微渗漏明显多于其他修复体。在牙龈边缘，带有β-石英嵌体的修复体微渗漏明显少于其他组。整块技术放置的修复体染料渗透明显多于其他修复体。
使用玻璃陶瓷嵌体可减少Ⅴ类树脂复合材料修复体的边缘渗漏。
