Department of Restorative Dentistry, Division of Oral Health Science, Hokkaido University Graduate School of Dental Medicine, Sapporo, Japan.
Dent Mater J. 2010 Nov;29(6):682-9. doi: 10.4012/dmj.2009-125. Epub 2010 Nov 19.
The purpose of this study was to investigate the effect of application time of colloidal platinum nanoparticles (CPN) on bond strength. Dentin surfaces were subjected to one of the following treatments: (A) Etching with 10% citric acid-3% FeCl(3 )solution (10-3 solution); (B) Etching with 10-3 solution followed by applying CPN as a primer solution for 10, 20, 30, or 60 seconds; and (C) Priming with CPN for 10, 20, 30, or 60 seconds followed by etching with 10-3 solution. An acrylic rod was bonded to each treated dentin surface using 4-META/MMA-TBB resin. Bonded specimens were sectioned into beams for microtensile bond strength testing. In groups (B) and (C), highest bond strength was obtained when dentin surfaces were treated with CPN for 30 seconds. This meant that the CPN primer solution either enhanced the penetration of resin into dentin or the degree of conversion of 4-META/MMA-TBB resin. Within the limitations of this study, treatment with 0.1 mN CPN primer solution followed by 20 seconds of water rinsing resulted in high bond strength.
本研究旨在探讨胶体铂纳米粒子（CPN）应用时间对黏结强度的影响。牙本质表面接受以下处理之一：（A）用 10%柠檬酸-3%FeCl(3)溶液（10-3 溶液）蚀刻；（B）用 10-3 溶液蚀刻后，将 CPN 作为底漆溶液应用 10、20、30 或 60 秒；（C）用 CPN 预涂 10、20、30 或 60 秒，然后用 10-3 溶液蚀刻。用 4-META/MMA-TBB 树脂将丙烯酸棒黏合到每个处理过的牙本质表面。黏合后的样本被切割成梁，进行微拉伸黏结强度测试。在组（B）和（C）中，当牙本质表面用 CPN 处理 30 秒时，获得了最高的黏结强度。这意味着 CPN 底漆溶液要么增强了树脂对牙本质的渗透，要么增强了 4-META/MMA-TBB 树脂的转化率。在本研究的限制范围内，用 0.1 mN CPN 底漆溶液处理，然后用水冲洗 20 秒，可获得高黏结强度。
