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Adhesion between the Composite Resin and Dentin by Amino-acid Derivatives Primers

氨基酸衍生物底漆复合树脂与牙本质的附着力

基本信息

批准号：
03670915
负责人：
SUZUKI Kazuomi
金额：
$ 1.28万
依托单位：
Okayama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

项目摘要

The effect of tooth surface treatment and its mechanism was examined to obtain improved adhesion of restoraive resin. From the fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and adhesive strength studies with respect to collagen and acid-etched dentin, treated with aqueous solution of 2-hydroxyethyl methacrylate (HEMA), the following results were obtained. Water was an essential component in respect to the adsorption of HEMA to collagen fiber. Substantial amounts of HEMA were adsorbed by collagen fiber when the concentration range of HEMA in aqueous solution was 6-60wt%. Scanning electron photomicrographs of the dentin plates treated by various methods are illustrated. As stated in the Experimental section, the hydroxyapatite is removed and only collagen fibers are exposed. The phospholic acid and succinic acid-treated dentin plates show only dentinal-tuble structure of the dentin, but do not show individual collagen fibers. All collagen fibers collapsed and show a smooth appearance due to aggregate formation. Contrary to these two samples treated only by acid, the sample that is pre-treated by phospholic acid followed by HEMA solution treatment clearly shows individual collagen fibers. This morphological difference is likely caused by a stiffening effect by anti-plastization of the absorbed HEMA. In regard to tensile bond strength of a composite resin to dentin, 12.07, 10.9, and 7.04 MPa was obtained with phosphoric acid, 30%HEMA, citric acid, 30%HEMA and EDTA, 30%HEMA aqueous solution, respectively.

为提高牙体树脂的附着力，对牙体表面进行处理，并探讨其作用机理。从傅里叶变换红外光谱（FT-IR），扫描电子显微镜（SEM）和粘接强度的研究，相对于胶原和酸蚀牙本质，用2-羟乙基甲基丙烯酸酯（HEMA）的水溶液处理，得到以下结果。水是胶原纤维吸附HEMA的重要组分。当水溶液中的HEMA浓度在6- 60wt%范围内时，胶原纤维对HEMA有较强的吸附作用。扫描电子显微镜照片的牙本质板处理的各种方法进行说明。如实验部分所述，去除羟基磷灰石，仅暴露胶原纤维。磷酸和琥珀酸处理的牙本质板仅显示牙本质的牙本质小管结构，但不显示单独的胶原纤维。由于聚集体形成，所有胶原纤维塌陷并显示出光滑的外观。与仅用酸处理的这两个样品相反，用磷酸预处理然后用HEMA溶液处理的样品清楚地显示出单独的胶原纤维。这种形态差异可能是由吸收的HEMA的抗塑化的硬化效应引起的。磷酸、30%HEMA、柠檬酸、30%HEMA和EDTA、30%HEMA水溶液对复合树脂与牙本质的粘结强度分别为12.07、10.9和7.04 MPa。