Abstract
The purpose of this study was to measure the improvement of the adhesive strength between resins and Ag-Pd-Cu-Au surface-treatment alloy by the flame spraying method.
The shear bond strength of Ag-Pd-Cu-Au alloy was increased when a flame spraying treatment was applied to its surface. We compared the use of retention beads with that ofthe resin materials by using the spraying method.
Superior bond strength spraying materials were sought, and analysis was carriedout.
The results were as follows:
1. The most suitable spraying distance was between 15 cm and 25 cm.
2. The adhesive strength of Ni-Cr-Al-Mo spraying materials had the highest value among the marketed spraying materials.
3. In several trial cases Al powder was added to the Co-Cr alloy powder fused with Ag-Pd-Cu-Au alloy, becoming an improved spraying material with increased adhesive strength.
4. The most suitable quantity of Al powder for dental adhesive Co-Cr alloy powder was 30 wt%.
5. Examination of the Co-Cr (30 Al included) powder sprayed surface showed that Al (45 wt%) was the most frequently applied material.
6. The retention beads had a mechanical retention only. However, Co-Cr (30 Al included) powder by flame spraying treatment was judged to be a good chemical adhesive.
