Comparación de la resistencia de tres sistemas cerámicos en tramos protésicos fijos anteriores. Análisis por elementos finitos
ABSTRACT: The purpose of this study was to evaluate stress distribution on three-unit fixed partial dentures (FPD) in the anterior region, made of three ceramic systems with connector variations. The study was performed by the finite element method. Methods: four segments of FPD were modeled; three...
- Autores:
-
Pineda Duque, Érika Alejandra
Escobar Restrepo, Julio César
Latorre Correa, Federico
Villarraga Ossa, Junes Abdul
- Tipo de recurso:
- Article of investigation
- Fecha de publicación:
- 2013
- Institución:
- Universidad de Antioquia
- Repositorio:
- Repositorio UdeA
- Idioma:
- spa
- OAI Identifier:
- oai:bibliotecadigital.udea.edu.co:10495/4459
- Acceso en línea:
- http://hdl.handle.net/10495/4459
- Palabra clave:
- Prótesis dental
Coronas
Cerámicas
Óxido de aluminio
- Rights
- openAccess
- License
- Atribución-NoComercial-CompartirIgual 2.5 Colombia (CC BY-NC-SA 2.5 CO)
| Summary: | ABSTRACT: The purpose of this study was to evaluate stress distribution on three-unit fixed partial dentures (FPD) in the anterior region, made of three ceramic systems with connector variations. The study was performed by the finite element method. Methods: four segments of FPD were modeled; three of them were made on ceramic systems: lithium disilicate, alumina, and zirconia, and the fourth model was of lithium disilicate with a connector of 9 mm2 in area. The modeling included three variables: elastic modulus, Poisson’s ratio, and ultimate tensile strength. An initial load of 200 N was applied and increased up to 1000 N calculating von Mises, maximum tensile, compressive, and shear stresses. Results and conclusions: all the ceramic systems showed a suitable behavior for FPDs in the anterior area; the structure’s elastic modulus influences stress behavior; if it is higher, it reduces stresses in feldspar ceramics and periodontal ligament. We noted that in presence of a connector of 16 mm2 in area, the periodontal ligament received greater stresses as a compensation effect, but they significantly decreased in the structure. By reducing the connector area to 9 mm2, the stresses increased to 48%, but did not reach yield strength when subjected to loads of 1000 N, providing the system with proper margin tolerance without fracturing. |
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