Fundamental studies on mechanism of adhesion of dental adhesive resin

1.粘合剂及被粘物表面处理被粘物的表面性质影响粘接的长期稳定性。最有效的表面处理方法是：牙釉质用60%磷酸或10%柠檬酸-3%三氯化铁溶液，牙本质用u/%柠檬酸-3%三氯化铁(或氯化铜)溶液，牙科合金或瓷器表面进行各种粗化处理或功能单体处理。介绍了各种功能单体已知的功能单体，如4-甲基和苯基-P，以提高粘合的稳定性。为了提高胶粘剂的粘接强度，新合成或引入了各种单体。牙科合金为含酸酐基团的MBPA或含硫酚基的MPMA，瓷用为含三甲氧基硅基的KBM503。制备了含有其中一种功能单体的实验粘接树脂，并对其使用方法或粘接机理进行了精确的考察。对实验粘接树脂体系的评价表明，含有MBPA的MMA-TBBO树脂对IV型金合金、金-银-钯合金和镍铬合金具有持久而稳定的粘接性能。这种效应被认为是由于亚甲基间隔基被引入到单体分子中而引起的。在MPMA的情况下，通过在使用粘合剂之前将单体吸附在被粘接表面上，粘接强度显著提高，尤其是对钯或金-银-钯合金。ESCA分析确定了MPMA与钯之间的化学键。将KBM偶联剂应用于瓷面，可提高瓷面的粘接耐久性。并对实验用粘接树脂的使用方法进行了临床评价。

1. Adhesives and surface treatment of adherendThe surface properties of adherend affects the long term stability of adhesion. The most effective surface treatments were found to be the application of 60% phosphoric acid or 10% citric acid - 3% ferric chloride solutions for enamel, the application of u/% citric acid - 3% ferric chloride ( or cupric chloride ) solution for dentin, and various treatments to roughen surfaces or the application of functional monomer for dental alloys or porcelain.2. Introduction of various kinds of functional monomersFunctional monomers such as 4-META and Phenyl-P are known to improve the stability of adhesion. Various kinds of monomers were newly synthesized or introduced to enhance adhesive strength. They are MBPA with anhydride group or MPMA with thiophenol group for dental alloys, and KBM503 with trimethoxysilyl group for porcelain. The experimental adhesive resins containing one of these functional monomers were prepared, and the methods of applications or mechanism of adhesion was precisely examined.3. Evaluation of experimental adhesive resin systemMMA - TBBO resins containing MBPA showed durable and stable adhesion to gold alloy type IV, gold-silver-palladium alloys and nickel-chromium alloys. This effect was considered to be caused by the incorporation of methylene group spacers into the monomer molecules. In the case of MPMA, adhesive strength, especially to palladium or gold-silver-palladium alloys, was significantly enhanced by adsorbing the monomer on the adherend surface before the application of adhesives. The chemical bond between MPMA and palladium was ascertained by ESCA analysis. The application of KBM coupling agent to porcelain surface was also found to improve the durability of adhesion. The method of application of these experimental adhesive resins was evaluated clinically.