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

该项目旨在为合金的开发和合金表面的制备建立指导方针，以获得粘合树脂的强粘合。该项目得出以下结论：1。采用一种含4-META的牙用粘接树脂粘接Co-Cr和Ni-Cr合金的不同表面状态。树脂在抛光表面的结合强度优于氧化表面。氧化表面吸附了一层数分子厚的h2o，降低了键合强度。对Ni-Cr合金表面进行conc处理后，4-META残基对Ni-Cr合金的粘附能力显著提高。HNO_3溶液。ESCA研究表明，对4-META树脂具有良好化学亲和力的Cr集中在合金表面，HNO_3溶液处理后表面形成牢固的被动结构。这是4-META树脂对钝化膜的粘接能力增加的原因。研究了贵重合金中添加的碱性合金元素。由于浸在水中对纯锡和纯铟金属具有优异的附着力，因此将这些金属加入到贵金属合金中。合金被氧化为SnO_2或In_2O_3氧化物。本项目建立了临床应用的合金氧化物简单还原方法。

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.