Korkmaz Yonca, Ozel Emre, Attar Nuray
Baskent University, Faculty of Dentistry, Department of Restorative Dentistry, Ankara, Turkey.
J Adhes Dent. 2007 Apr;9(2):189-94.
The aim of this study was to determine the influence of four flowable composite linings on marginal microleakage and internal voids in Class II composite restorations with the margins above the cementoenamel junction (CEJ).
Class II cavities were randomly divided into 8 groups (n = 10). Group 1: One Step Plus/Aelite LS Packable; group 2: One Step Plus/Aelite Flow/Aelite LS Packable; group 3: Comfort Bond/Solitaire 2; group 4: Comfort Bond/Flowline/Solitaire 2; group 5: Solobond M/Grandio; group 6: Solobond M/Grandio Flow/Grandio; group 7: Admira Bond/Admira; Group 8: Admira bond/Admira Flow/Admira. After restoration, all teeth were stored for 24 h, thermocycled (at 5 degrees C to 55 degrees C) 500 times, and soaked in 0.5% basic fuchsin dye for 24 h. After soaking, the teeth were sectioned and observed under a stereomicroscope. Gingival marginal microleakage and internal voids (at the gingival wall interface and in the cervical and the occlusal parts) were recorded. Data were analyzed with the Mann-Whitney U- and Kruskal-Wallis tests (p < 0.05).
Statistical analyses indicated that the use of flowable resin composites provided a reduction in microleakage in groups 6 and 8. Groups 2 and 4 showed fewer voids in the cervical area than without flowable composites.
It was concluded that none of the materials tested was able to eliminate the marginal microleakage on the cervical wall. Flowable resin composites under nanohybrid (group 6) and ormocer (group 8) composites provided a significantly different reduction in microleakage compared to restorations without flowable liners. Fewer cervia voids were observed in packable composites with flowable liner (groups 2 and 4) than without flowable liner (groups 1 and 3s).
本研究旨在确定四种可流动复合树脂衬层对二类复合树脂修复体边缘微渗漏及内部孔隙的影响，这些修复体边缘位于牙骨质釉质界（CEJ）上方。
二类窝洞随机分为8组（n = 10）。第1组：一步法 Plus/Aelite LS 可压实复合树脂；第2组：一步法 Plus/Aelite Flow/Aelite LS 可压实复合树脂；第3组：舒适粘结剂/Solitaire 2；第4组：舒适粘结剂/Flowline/Solitaire 2；第5组：Solobond M/Grandio；第6组：Solobond M/Grandio Flow/Grandio；第7组：Admira Bond/Admira；第8组：Admira bond/Admira Flow/Admira。修复后，所有牙齿保存24小时，进行500次热循环（5℃至55℃），并在0.5%碱性品红染料中浸泡24小时。浸泡后，将牙齿切片并在体视显微镜下观察。记录牙龈边缘微渗漏及内部孔隙（牙龈壁界面、颈部和咬合部分）情况。数据采用曼-惠特尼U检验和克鲁斯卡尔-沃利斯检验进行分析（p < 0.05）。
统计分析表明，使用可流动树脂复合材料可减少第6组和第8组的微渗漏。第2组和第4组在颈部区域的孔隙比不使用可流动复合材料时少。
得出的结论是，所测试的材料均无法消除颈部壁上的边缘微渗漏。与不使用可流动衬层的修复体相比，纳米混合（第6组）和有机陶瓷（第8组）复合材料下的可流动树脂复合材料在减少微渗漏方面有显著差异。与不使用可流动衬层（第1组和第3组）的可压实复合材料相比，使用可流动衬层（第2组和第4组）的可压实复合材料在颈部的孔隙较少。
