Department of Operative Dentistry, Nihon University School of Dentistry.
Dent Mater J. 2020 Aug 2;39(4):616-623. doi: 10.4012/dmj.2019-154. Epub 2020 Feb 29.
This study aimed to determine the role of the 10-methacryloyloxydecyl dihydrogen phosphate (MDP) in dentin bond durability of universal adhesive in etch-&-rinse mode through bond strength tests after different degradation conditions. This study used the MDP-containing universal adhesive, Clearfil Universal Bond Quick (CU), and an experimental adhesive (NM) made with the same ingredients as CU, excluding MDP. Shear bond strength (SBS) to dentin were obtained in etch-&-rinse mode with or without MDP. CU in self-etch mode was used as a comparison. The groups were divided into three types: 1) subjected to thermal cycling; 2) subjected to long-term water storage; and 3) stored in water for 24 h, as a baseline. The discrepancies in the mean SBS of the CU and NM groups become prominent with prolonged degradation periods. This study indicates that the MDP in universal adhesive might play a key role in enhancing dentin bond quality even when etch-&-rinse mode is used.
本研究旨在通过不同降解条件下的粘接强度测试，确定 10-甲基丙烯酰氧癸基二氢磷酸酯（MDP）在通用型酸蚀-自酸蚀粘接剂的牙本质粘接耐久性中的作用。本研究使用含 MDP 的通用型粘接剂 Clearfil Universal Bond Quick（CU）和一种实验性粘接剂（NM），其成分与 CU 相同，只是不含 MDP。采用酸蚀-自酸蚀模式，在有无 MDP 的情况下获得牙本质的剪切粘接强度（SBS）。将自酸蚀模式下的 CU 作为对照。将各组分为三种类型：1）热循环；2）长期水储存；3）24 小时储水，作为基线。随着降解时间的延长，CU 和 NM 组的平均 SBS 差异变得更加明显。本研究表明，即使使用酸蚀-自酸蚀模式，通用型粘接剂中的 MDP 也可能在增强牙本质粘接质量方面发挥关键作用。
