| Autor: |
Walker RS; Department of Biomaterials, Louisiana State University, School of Dentistry, New Orleans., Sarkar NK, Ciolino RJ |
| Jazyk: |
angličtina |
| Zdroj: |
The Journal of prosthetic dentistry [J Prosthet Dent] 1989 Sep; Vol. 62 (3), pp. 348-52. |
| DOI: |
10.1016/0022-3913(89)90348-x |
| Abstrakt: |
Differential thermal analysis, optical microscopy, scanning electron microscopy, and energy dispersive radiographic analysis were used to examine and analyze two failed platinum-palladium-gold pin-retained nickel-chromium castings. The microstructure and chemical composition of the pin-casting interface were different from those of the pin and the cast alloy. Porosity was also observed at the interface. The observations with these samples suggest that the pin melted during casting. The embrittlement and failure of plantium-palladium-gold pins cast with nickel-chromium alloy have been attributed to this melting phenomenon. Further study is necessary to determine whether these observations are valid for a large number of samples. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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