Matsui Naoko, Takagaki Tomohiro, Sadr Alireza, Ikeda Masaomi, Ichinose Shizuko, Nikaido Toru, Tagami Junji
Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.
Dent Mater J. 2015;34(2):227-33. doi: 10.4012/dmj.2014-205. Epub 2015 Feb 24.
The purpose of this study was to evaluate the role of 10-methacryloyloxydecyl dihydrogen phosphate (MDP) contained in the bonding resin of a two-step self-etch adhesive system. An experimental adhesive (M0) containing MDP only in the primer, but not in the bonding resin was prepared. Clearfil SE Bond (MM) and M0 were compared in terms of microtensile bond strength to dentin, ultimate tensile strength of the bonding resin, and dentin-resin bonding interface morphology under SEM and TEM. The immediate µTBS values of MM significantly decreased after thermal cycles while M0 were stable even after 10,000 cycles. In the SEM observations, formation of erosion was observed beneath the acid-base resistant zone only in M0. The results suggested that MDP in the bonding resin of the two-step self-etching system; 1) improved the immediate bond strength, but caused reduction in long-term bond durability; 2) offered the advantages of acid-base resistance at the ABRZ forefront area.
本研究的目的是评估两步自酸蚀粘结系统粘结树脂中含有的10 - 甲基丙烯酰氧基癸基磷酸二氢酯（MDP）的作用。制备了一种仅在底漆中含有MDP而粘结树脂中不含MDP的实验性粘结剂（M0）。比较了Clearfil SE Bond（MM）和M0在与牙本质的微拉伸粘结强度、粘结树脂的极限拉伸强度以及扫描电子显微镜（SEM）和透射电子显微镜（TEM）下牙本质 - 树脂粘结界面形态方面的差异。热循环后，MM的即时微拉伸粘结强度（µTBS）值显著下降，而M0即使在10000次循环后仍保持稳定。在SEM观察中，仅在M0的耐酸碱区下方观察到侵蚀形成。结果表明，两步自酸蚀系统粘结树脂中的MDP：1）提高了即时粘结强度，但导致长期粘结耐久性降低；2）在耐酸碱区前沿区域具有耐酸碱优势。
