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Surface gold alloys for an adhesion bridge modified by a laser

用于激光改性粘附桥的表面金合金

基本信息

批准号：
11671958
负责人：
OHKUMA Kazuo
金额：
$ 0.96万
依托单位：
The Nippon Dental University School of Dentistry
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

项目摘要

The advantage of an adhesive bridge is it requires less tooth preparation. Preventing attrition is an important consideration in selecting a strong alloy or an adhesive bride. Therefore, after coating a strong mother alloy with gold plate, we used laser irradiation to further strengthen the surface.In experiments using a 45 %Ag-35Pd-20Cu alloy (after hardening) and a Co-Cr alloy as the mother alloy, the surface of the surface gold alloys was 1/2 - 1/3 as hard as the mother alloy and showed enhanced color stability.Bridges that could withstand the occlusal force possessed the following features : the bridge was for only one missing tooth, the gold plate had thickness of 100 μm, less than 2 mm of materials was required in total, and cobalt-chromium was used as the mother alloy.The cobalt-chromium alloy was the most suitable material for surface gold alloy adhesion bridges because it is strong and flexible.A surface layer gold alloy created from a mother alloy that is 45 %Ag-35Pd-20Cu and is coated with an over 60 μm gold plating and the laser irradiated has broader, more stable electric the mechanism to oxidize immediately and remain in an immutable passive state with good color-stability. But when cobalt chrome alloys are used as mother alloys, the ensuing heavy layer of membrane in a passive state actually serves to counteract the color-stability properties of cobalt chrome alloys.

粘接桥的优点是它需要更少的牙齿准备。在选择坚固的合金或粘合剂时，防止磨损是一个重要考虑因素。因此，在用金板涂覆强母合金之后，我们使用激光照射来进一步强化表面。（硬化后）和作为母合金的Co-Cr合金，表面金合金的表面积为1/2 ~ 1/3的硬度与母合金相当，并且显示出增强的颜色稳定性。能够承受咬合力的桥具有以下特征：该桥仅用于一颗缺失的牙齿，金片厚度为100 μm，总共需要不到2 mm的材料，以钴铬合金为母合金，铬合金是最适合用于表面金合金粘附桥的材料，因为它具有强度和柔性。由45%Ag-35 Pd-20 Cu母合金经60 μm以上的镀金层镀制而成，经激光辐照后，具有更宽、更稳定的电学机制，能立即氧化，保持不变的钝化状态，颜色稳定性好。但是当钴Chrome合金用作母合金时，随后产生的钝化状态的厚膜层实际上用于抵消钴Chrome合金的颜色稳定性。