Sayinsu Korkmaz, Isik Fulya, Sezen Serdar, Aydemir Bulent
Faculty of Dentistry, Yeditepe University, Istanbul, Turkey.
Am J Orthod Dentofacial Orthop. 2007 Mar;131(3):391-4. doi: 10.1016/j.ajodo.2005.04.049.
The application of a polymer coating to the labial enamel tooth surface before bonding can help keep white spot lesions from forming. Previous studies evaluating the effects of blood and saliva contamination on the bond strengths of light-cured composites showed significant reductions in bond strength values. The purpose of this study was to investigate whether the bond strength of a light-cured system (Transbond XT, 3M Unitek, Puchheim, Germany) used with a liquid polish (BisCover, Bisco, Schaumburg, Ill) is affected by contamination with blood or saliva.
One hundred twenty permanent human premolars were randomly divided into 6 groups of 20. Various enamel surface conditions were studied: dry, blood contaminated, and saliva contaminated. A light-cured bonding system (Transbond XT) was used in all groups. The teeth in group 1 were bonded with Transbond XT. In the second group, BisCover polymeric resin polish was applied on the etched tooth surfaces before the brackets were bonded with Transbond XT resin. Comparison of the first and second groups showed no statistically significant difference. Groups 3 through 6 were bonded without Transbond XT. For groups 3 and 5, a layer of blood or saliva, respectively, was applied to the etched enamel followed by BisCover. In groups 4 and 6, blood or saliva, respectively, was applied on the light-cured BisCover. Shear forces were applied to the samples with a universal testing machine, and bond strengths were measured in megapascals.
The protective liquid polish (BisCover) layer did not affect bond strength.
Blood contamination on acid-etched surfaces affects bond strength more than saliva contamination. When a protective liquid polish (BisCover) is applied to the tooth surface, the effect of contamination by blood or saliva is prevented.
在粘结前在唇面牙釉质表面应用聚合物涂层有助于防止白斑病变形成。先前评估血液和唾液污染对光固化复合树脂粘结强度影响的研究表明粘结强度值显著降低。本研究的目的是调查使用液体抛光剂（BisCover，Bisco，伊利诺伊州绍姆堡）的光固化系统（Transbond XT，3M Unitek，德国普赫海姆）的粘结强度是否会受到血液或唾液污染的影响。
120颗人类恒牙前磨牙随机分为6组，每组20颗。研究了各种牙釉质表面状况：干燥、血液污染和唾液污染。所有组均使用光固化粘结系统（Transbond XT）。第1组的牙齿用Transbond XT粘结。在第2组中，在使用Transbond XT树脂粘结托槽之前，在酸蚀后的牙面上应用BisCover聚合树脂抛光剂。第1组和第2组的比较显示无统计学显著差异。第3组至第6组不使用Transbond XT进行粘结。对于第3组和第5组，分别在酸蚀后的牙釉质上涂抹一层血液或唾液，然后涂抹BisCover。在第4组和第6组中，分别在光固化的BisCover上涂抹血液或唾液。用万能试验机对样本施加剪切力，并以兆帕为单位测量粘结强度。
保护性液体抛光剂（BisCover）层不影响粘结强度。
酸蚀表面的血液污染比唾液污染对粘结强度的影响更大。当在牙齿表面应用保护性液体抛光剂（BisCover）时，可以防止血液或唾液污染的影响。
