Eliasson Sigfus Thor, Dahl Jon Einar
Nordic Institute of Dental Materials, Oslo, Norway.
Faculty of Odontology, School of Health Sciences, University of Iceland, Reykjavik, Iceland.
Biomater Investig Dent. 2024 Oct 1;11:41933. doi: 10.2340/biid.v11.41933. eCollection 2024.
To investigate whether acid etch contamination of silane-treated composite influenced repair bond strength and whether silane contamination on dentin influenced composite bond strength to dentin.
Forty composite blocks stored in water for 4 weeks were divided into four groups. Specimens in groups 1-3 were coated with Bis-Silane and contaminated with acid etch + water spray (group 1) or water spray (group 2). Group 3 was not contaminated. Group 4 was untreated. The occlusal third of 60 third molars was cut off, ground flat, and divided into three groups. After etching, the surfaces in groups A and B were contaminated with Bis-silane. The contaminated surfaces in group A were re-etched.Each composite repair group and composite-dentin group was divided into two subgroups receiving Adper Scotchbond 1 XT or Clearfil SE Bond 2 adhesives followed by a composite build up. After ageing for 3 months, specimens were sectioned into 1.1 mm × 1.1 mm rods for tensile testing and strength calculated at fracture. The fracture was examined using microscope.
Bis-Silane surface treatment increased the repair bond strength. Contamination with acid reduced the strength of the repair bond. Similar results were obtained for both adhesives. Tooth surface contamination with silane reduced the bond strength between dentin and composite. Additional acid etching or water spray on silane contaminated dentin did not influence the weakened bond strength. Most fractures were adhesive type.
Silane contamination on etched dentin and acid etch contamination on silanized composite surfaces significantly reduced tensile bond strength.
研究硅烷处理后的复合材料酸蚀污染是否会影响修复粘结强度，以及牙本质上的硅烷污染是否会影响复合材料与牙本质的粘结强度。
将40个在水中储存4周的复合树脂块分为四组。第1 - 3组的样本用双硅烷涂层，并分别用酸蚀+喷水（第1组）或喷水（第2组）进行污染。第3组未被污染。第4组未作处理。将60颗第三磨牙的咬合面三分之一截断、磨平，分为三组。酸蚀后，A组和B组的表面被双硅烷污染。A组被污染的表面再次进行酸蚀。每个复合树脂修复组和复合树脂 - 牙本质组又分为两个亚组，分别使用Adper Scotchbond 1 XT或Clearfil SE Bond 2粘结剂，然后进行复合树脂堆塑。老化3个月后，将样本切成1.1 mm×1.1 mm的棒状进行拉伸测试，并计算断裂时的强度。使用显微镜检查断裂情况。
双硅烷表面处理提高了修复粘结强度。酸污染降低了修复粘结强度。两种粘结剂均得到类似结果。牙本质表面被硅烷污染降低了牙本质与复合树脂之间的粘结强度。在硅烷污染的牙本质上额外进行酸蚀或喷水并不会影响减弱的粘结强度。大多数断裂为粘结型。
酸蚀牙本质上的硅烷污染和硅烷化复合树脂表面的酸蚀污染显著降低了拉伸粘结强度。
