Gurgan Sevil, Alpaslan Tugba, Kiremitci Arlin, Cakir Filiz Yalcin, Yazici Esra, Gorucu Jale
Hacettepe University, School of Dentistry, Department of Restorative Dentistry, Sihhiye 06100, Ankara, Turkey.
J Dent. 2009 Jul;37(7):527-34. doi: 10.1016/j.jdent.2009.03.012. Epub 2009 Apr 28.
This study determined the shear bond strength of a nanohybrid composite resin to bleached enamel immediately or 15 days later using different adhesive systems and laser application.
One hundred and forty enamel specimens were prepared from human molar teeth and bleached either with 16% carbamide peroxide (CP) or 30% CP according to the manufacturer's (Vivastyle/Vivadent) recommendations. After bleaching treatments specimens were divided into two groups according to the treatment time of the adhesive procedures: immediately or 15 days after the bleaching treatments. The four groups were then divided into five subgroups due to the surface treatments: using a two-step self-etching adhesive (AdheSe, Ivoclar Vivadent G, Schaan, Liechtenstein) or a two-step etch and rinse adhesive (Excite, Ivoclar Vivadent G, Schaan, Liechtenstein) and application of laser prior to adhesive procedures or not. After adhesive procedures nanohybrid composite resin cylinders of 4 mm x 2 mm (Tetric Evo Ceram/Vivadent) were bonded to the enamel surfaces. All specimens were subjected to shear bond strength test after thermocycling and 24h of storage in water. Data were analyzed statistically.
Mann-Whitney U-test analysis showed no significant difference in the mean bond strength values of enamel bleached with either 16% CP or 30% CP (p>0.05). There was no difference between the groups bonded immediately or 15 days after bleaching (p>0.05). Application of the etch and rinse adhesive after 15 days showed the highest bond strength values, whereas self-etching adhesive and laser application showed the lowest values in both bleaching treatments.
The results suggested that following the bleaching treatments, the use of etch and rinse adhesive system may provide higher bond strengths than self-etching adhesive and laser application.
本研究使用不同的粘结系统和激光照射，测定纳米混合复合树脂与漂白牙釉质即刻或15天后的剪切粘结强度。
从人磨牙制备140个牙釉质标本，按照制造商（Vivastyle/Vivadent）的建议，用16%过氧化脲（CP）或30% CP进行漂白。漂白处理后，根据粘结程序的处理时间将标本分为两组：漂白处理后即刻或15天。然后根据表面处理将这四组再分为五个亚组：使用两步自酸蚀粘结剂（AdheSe，Ivoclar Vivadent G，Schaan，列支敦士登）或两步酸蚀冲洗粘结剂（Excite，Ivoclar Vivadent G，Schaan，列支敦士登），以及在粘结程序之前是否应用激光。粘结程序后，将4 mm×2 mm的纳米混合复合树脂圆柱体（Tetric Evo Ceram/Vivadent）粘结到牙釉质表面。所有标本在热循环和在水中储存24小时后进行剪切粘结强度测试。对数据进行统计学分析。
Mann-Whitney U检验分析表明，用16% CP或30% CP漂白的牙釉质的平均粘结强度值无显著差异（p>0.05）。漂白后即刻粘结或15天后粘结的组之间无差异（p>0.05）。15天后应用酸蚀冲洗粘结剂显示出最高的粘结强度值，而自酸蚀粘结剂和激光照射在两种漂白处理中均显示出最低值。
结果表明，漂白处理后，使用酸蚀冲洗粘结系统可能比自酸蚀粘结剂和激光照射提供更高的粘结强度。
