Malekafzali Beheshteh, Ghasemi Amir, Torabzadeh Hassan, Hamedani Reza, Tadayon Nekoo
Associate professor, Department of Pedodontics, Shahid Beheshti University of Medical Science Dental School, Tehran, Iran.
J Dent (Tehran). 2013 Mar;10(2):169-74. Epub 2013 Mar 31.
Multiple adhesive coating is a controversial topic, especially in primary dentition that should be clarified. We evaluated the effect of multiple consecutive adhesive resin coatings on the microshear bond strength (μSBS) of composite resin to primary tooth dentin utilizing a filled (Adper Single Bond Plus) and an unfilled (Adper Single Bond) adhesive resin.
Thirty extracted primary canines were randomly allocated into two groups based on the adhesive used. Dentin occlusal surfaces were exposed and further polished on 400, 600 and 800-grit silicon-carbide paper. The surfaces were divided into two halves in the labial-lingual orientation. After etching, the adhesives were used either in double coats, or four coats on the halves of the same tooth followed by air evaporation for each layer and finally light curing. Cylinders of composite were bonded to the dentin surfaces. After 24 h shear bond testing was evaluated by Bisco tensile tester. ANOVA, Student t test and paired t test were used for statistical analysis.
The mean (standard deviation) for double coats or four coats in single bond were 31.99 (2.94) and 30.25 (2.69), while they were 29.18 (3.35) and 31.26 (2.07) in single bond plus, respectively. No significant differences were found between the double coated specimens and those receiving four coatings with both adhesives (p>0.05). Micro SBS values of Single Bond double coated specimens were significantly higher than Single Bond Plus (p=0.02). In four-coated specimens, there were no significant differences between Single Bond and Single Bond Plus (p=0.26).
Applying four coats of adhesive did not improve the μSBS to primary tooth dentin.
多次粘结剂涂层是一个有争议的话题，尤其是在乳牙列中，这一点需要阐明。我们使用一种填充型（Adper Single Bond Plus）和一种未填充型（Adper Single Bond）粘结剂树脂，评估了连续多次粘结剂树脂涂层对复合树脂与乳牙牙本质微拉伸粘结强度（μSBS）的影响。
根据所使用的粘结剂，将30颗拔除的乳牙随机分为两组。暴露牙本质咬合面，并用400、600和800目碳化硅砂纸进一步打磨。在唇舌方向将表面分为两半。酸蚀后，在同一颗牙的两半上分别使用双层涂层或四层涂层的粘结剂，每层涂完后进行空气吹干，最后光固化。将复合树脂圆柱体粘结到牙本质表面。24小时后，使用Bisco拉伸测试仪评估剪切粘结测试。采用方差分析、学生t检验和配对t检验进行统计分析。
单粘结剂双层涂层或四层涂层的平均值（标准差）分别为31.99（2.94）和30.25（2.69），而单粘结剂加型的相应值分别为29.18（3.35）和31.26（2.07）。两种粘结剂的双层涂层样本与四层涂层样本之间均未发现显著差异（p>0.05）。单粘结剂双层涂层样本的微拉伸粘结强度值显著高于单粘结剂加型（p=0.02）。在四层涂层样本中，单粘结剂与单粘结剂加型之间无显著差异（p=0.26）。
应用四层粘结剂涂层并未提高复合树脂与乳牙牙本质的微拉伸粘结强度。
