Explanation of Adhesion Mechanism and Alloy Surface Structures having Excellent Adhesion Ability for Dental Adhesive Resin, and Trial Manufacture of Alloys for Dental Adhesive Resin

该项目旨在建立开发合金和制备合金表面的指导方针，以获得粘合树脂的牢固粘结力。1.将含4-金属的牙科粘接树脂粘接到不同表面状态的钴铬合金和镍铬合金上。树脂在未抛光表面上的结合强度优于氧化表面。吸附在氧化表面的几个分子厚的H_2O层降低了结合强度。镍铬合金表面经ConC处理后，4-Me-Re的粘接性能显著提高。硝酸溶液。ESCA研究表明，铬对4-甲基树脂具有良好的化学亲和力，主要集中在合金表面，经HNO_3溶液处理后，表面形成牢固的钝化结构。这是4-甲基树脂在钝化胶片上粘接能力增强的原因。研究是为了澄清添加到贵重合金中的基础合金元素。由于纯锡和金属在水中浸泡后具有良好的附着力，因此将这些金属添加到贵金属中。合金被氧化成SnO_2或In_2O_3氧化物。在该项目中，建立了一种简单的还原方法，用于临床使用合金的氧化物。

The project was pursued to established the guide lines for both the development of alloys and preparation of the alloy surface to obtain strong bonds for the adhesive resin. The project leads to the lollowing conclusions:1. A dental adhesive resin containing 4-META was bonded to different surface states of Co-Cr and Ni-Cr alloys. The bonding strength of the resin on the as-polished surface is superior to the oxidezed surfaces. A several-molecule thick layer of H_2O which is adsorved on the oxidized surfaces lowers the bonding strength.2. The adhesive ability of 4-META reain to Ni-Cr alloy improves remarkably when the alloy surface is treated by conc. HNO_3 solution. ESCA study shows that Cr which has a good chemical affinity for 4-META resin, is concentrated on the alloy surface and that a firm passive structure is formed on the surface treated by HNO_3 solution. This is the cause of the increase the adhesive ability of the 4-META resin on the passive film.3. The studies were performed to clarify the base alloying elements adding to the precious alloys. As excellent adhesion ability was obtained on pure Sn and In metals after immersion in water, these metals were added to the precious alloys. The alloys were oxidezed to from SnO_2 or In_2O_3 oxides. Simple reduction method for clinical use of the oxides on the alloys was established in the project.