Department of Occlusal and Oral Functional Rehabilitation, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University.
Advanced Research Center for Oral and Craniofacial Science, Okayama University.
Dent Mater J. 2021 Mar 31;40(2):288-296. doi: 10.4012/dmj.2020-029. Epub 2020 Oct 7.
This study aimed to investigate whether inorganic elements of polymer-infiltrated ceramic (PIC) and microfilled resin (MFR) for CAD/CAM would affect initial bond strength to luting agent. Inorganic elements of PIC and MFR were different with shape and ingredient observed by SEM, STEM and EDS. Microtensile bond strengths (µTBS) value of PIC was increased by 10-methacryloyloxydecyl dihydrogen phosphate (MDP) and acetic acid (AA)- or MDP-activated silane treatment, and further increased by succeeding heat treatment (HT). The µTBS of MFR was increased by MDP and MDP-activated silane, but decreased by AA-activated silane without HT. The HT improved the µTBS of MFR with AA-activated silane, but conversely for MDP-activated silane. Only in MFR, phosphoric acid (PA) application before each surface treatment dramatically decreased the µTBS of AA-activated silane. FTIR peaks in MFR shifted according to phosphate group's peak. MFR would possess high phosphate group adsorption capacity, with MDP effectively improving its bonding capability.
本研究旨在探讨 CAD/CAM 用聚合物渗透陶瓷（PIC）和微填充树脂（MFR）中的无机元素是否会影响其对水门汀的初始粘结强度。通过 SEM、STEM 和 EDS 观察到 PIC 和 MFR 的无机元素在形状和成分上存在差异。经 10-甲氧基癸基二氢磷酸酯（MDP）和乙酸（AA）或 MDP 活化硅烷处理后，PIC 的微拉伸粘结强度（µTBS）值增加，随后进行热处理（HT）后进一步增加。MDP 和 MDP 活化硅烷可增加 MFR 的 µTBS，但 HT 会降低 AA 活化硅烷的 µTBS。HT 可提高 AA 活化硅烷处理的 MFR 的 µTBS，但对 MDP 活化硅烷则相反。仅在 MFR 中，在每次表面处理前施加磷酸（PA）会显著降低 AA 活化硅烷的 µTBS。MFR 中的 FTIR 峰根据磷酸盐基团的峰发生位移。MFR 具有高的磷酸基团吸附能力，MDP 可有效提高其粘结性能。
