Pranckevičienė Alma, Narbutaitė Rūta, Siudikienė Jolanta, Damaševičius Robertas, Maskeliūnas Rytis
Department of dental and oral pathology, Lithuanian University of Health Sciences, Luksos-Daumanto 6, LT-50106 Kaunas, Lithuania.
Stomatologija. 2019;21(4):113-118.
Objective of this study was to evaluate microleakage using self-etching universal adhesive on direct class V composite resin restorations under different cavity moisture conditions.
30 extracted human molars were divided into three groups (n=10) to compare the adhesive "Prime&BondActive"under optimal, overly dry, and overly wet cavity moisture conditions. Class V cavities were filled with nanocomposite and polished. All teeth were thermocycled for 3000 cycles, sealed and immersed in 1% methylene blue solution for 24 hours. Consequently, teeth were sectioned and analyzed under a microscope. Dye penetration lengths were scored in millimetres and permeation degrees.
The results showed that self-etching universal adhesive was least permeable (lower dye penetration depths) under optimal working field conditions. During overly wet cavity moisture conditions performans decreased insignificantly.
According to the present study there is no significant difference of microleakage using universal adhesive in class V composite restorations with different moisture level. However, too wet working field conditions tend to increase microleakage formation. In clinical performance, it could be suggested to keep an appropriate cavity moisture level.
本研究的目的是评估在不同窝洞湿度条件下，自酸蚀通用型粘结剂用于直接修复Ⅴ类复合树脂充填体时的微渗漏情况。
将30颗拔除的人磨牙分为三组（n = 10），以比较粘结剂“Prime&Bond Active”在窝洞湿度处于最佳、过度干燥和过度潮湿条件下的情况。Ⅴ类窝洞用纳米复合材料充填并抛光。所有牙齿进行3000次热循环，密封后浸入1%亚甲蓝溶液中24小时。然后，将牙齿切片并在显微镜下分析。染料渗透长度以毫米为单位计分，并评估渗透程度。
结果表明，自酸蚀通用型粘结剂在最佳工作场条件下渗透性最低（染料渗透深度较低）。在窝洞湿度过度潮湿的条件下，性能下降不明显。
根据本研究，在不同湿度水平的Ⅴ类复合树脂修复体中，使用通用型粘结剂的微渗漏无显著差异。然而，工作场条件过于潮湿往往会增加微渗漏的形成。在临床操作中，建议保持适当的窝洞湿度水平。
