Kameyama Atsushi, Oishi Takumi, Sugawara Toyotarou, Hirai Yoshito
Department of Operative Dentistry, Tokyo Dental College, Mihama-ku, Chiba, Japan.
Bull Tokyo Dent Coll. 2009 Feb;50(1):13-22. doi: 10.2209/tdcpublication.50.13.
This aim of this study was to determine the effect of type of bur and resin-coating material on microtensile bond strength (microTBS) of indirect composite to dentin. Dentin surfaces were first ground with two types of diamond bur and resin-coated using UniFil Bond (UB) or Adper Single Bond (SB), and then bonded to a resin composite disc for indirect restoration with adhesive resin cement. After storage for 24 hr in distilled water at 37 degrees C, microTBS was measured (crosshead speed 1 mm/min). When UB was applied to dentin prepared using the regular-grit diamond bur, microTBS was significantly lower than that in dentin prepared using the superfine-grit bur. In contrast, no significant difference was found between regular-grit and superfine-grit bur with SB. However, more than half of the superfine-grit specimens failed before microTBS testing. These results indicate that selection of bur type is important in improving the bond strength of adhesive resin cement between indirect resin composite and resin-coated dentin.
本研究的目的是确定车针类型和树脂涂层材料对间接复合树脂与牙本质之间微拉伸粘结强度（microTBS）的影响。首先用两种类型的金刚石车针打磨牙本质表面，并用优斐灵粘结剂（UB）或单组分粘结剂（SB）进行树脂涂层处理，然后用粘结性树脂水门汀粘结到树脂复合树脂盘上进行间接修复。在37℃蒸馏水中储存24小时后，测量微拉伸粘结强度（十字头速度1mm/min）。当UB应用于使用常规粒度金刚石车针制备的牙本质时，微拉伸粘结强度显著低于使用超细粒度车针制备的牙本质。相比之下，使用SB时，常规粒度和超细粒度车针之间未发现显著差异。然而，超过一半的超细粒度样本在微拉伸粘结强度测试前就发生了断裂。这些结果表明，车针类型的选择对于提高间接树脂复合材料与树脂涂层牙本质之间粘结性树脂水门汀的粘结强度很重要。
