| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an elastic board precision attachment with cap having yellowish gold color, being entirely strong against corrosion, harmonizing the rate of heat expansion on the cast point, and not forming oxide film on the cast point, by coating the precision attachment made of a titanium containing alloy with a gold film. SOLUTION: This castable elastic board precision attachment with cap for dental technique made of a noble metal alloy containing a base metal which forms its oxide is an attachment made of a titanium containing alloy covered with a gold film. The precision attachment is made of a gold alloy containing 0.5 to 0.4 weight % titanium, and only its cast point is covered with the gold film of which thickness is 3 to 100μm. This precision attachment has yellowish gold color, is entirely strong against corrosion and harmonizes the rate of heat expansion to the cast alloy.</p> |
