Characterization of the surface quality defects in cast frameworks for Cobalt – Chrome dental prostheses
Introduction: Cobalt – Chromium alloys have been used for the fabrication of cast frameworks which withstand the dental prostheses, failures that happen during the process of casting, polishing and finishing the framework generate surface quality defects which affect the mechanical properties of den...
- Autores:
-
Mosquera-Palomino, Josefina
Pineda-Higuita, Sonia Elena
Vélez-Gómez, Carlos Ignacio
Restrepo-Holguín, Sebastián
- Tipo de recurso:
- Article of journal
- Fecha de publicación:
- 2017
- Institución:
- Universidad Cooperativa de Colombia
- Repositorio:
- Repositorio UCC
- Idioma:
- spa
- OAI Identifier:
- oai:repository.ucc.edu.co:20.500.12494/9733
- Acceso en línea:
- https://revistas.ucc.edu.co/index.php/od/article/view/1663
https://hdl.handle.net/20.500.12494/9733
- Palabra clave:
- Rights
- openAccess
- License
- Derechos de autor 2017 Revista Nacional de Odontología
| Summary: | Introduction: Cobalt – Chromium alloys have been used for the fabrication of cast frameworks which withstand the dental prostheses, failures that happen during the process of casting, polishing and finishing the framework generate surface quality defects which affect the mechanical properties of dentures. Objective: To characterize the surface quality defects in cast frameworks for Cobalt – Chrome dental prostheses by scanning electron microscopy (SEM). Materials and Methods: An experimental study was conducted, where 19 cast frameworks made out of Cobalt – Chrome alloy were conveniently selected. The following variables were taken into account during the casting process: presentation of the alloy, type of centrifugal casting, way of polishing, shining and sanding the framework. Results: The main characteristics observed, by scanning electron microscopy (SEM) analysis, in the cast frameworks for Cobalt – Chrome dental prostheses were: irregularities, superficial heterogeneity, presence of carbon and cracks. There was also found a statistically significant association between the presentation of the alloy and the polishing with shinning and without shinning, with a value of p (0,04). Conclusions: Characterization by scanning electron microscopy (SEM) allows us to detect surface quality defects which generate mechanical failures and damages within medium and long term use, affecting the quality of dental prostheses. |
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