The influence of thickness ratios on the fatigue behaviors of two kinds of dental ceramic / 华西口腔医学杂志
West China Journal of Stomatology
;
(6): 92-99, 2009.
Artigo
em Chinês
| WPRIM
| ID: wpr-248301
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the intensity changes of different thickness ratios of Empress II glass ceramic and GI- II glass-infiltrated alumina ceramic before and after Hertzian contact cyclic fatigue.</p><p><b>METHODS</b>Disk-shaped specimens of different thickness ratios of Empress II glass ceramic and GI-II glass-infiltrated alumina ceramic were respectively fabricated. Hertzian contact technique was imposed on the specimens. Critical loads of the specimens before and after 10(5) cycles loading were recorded.</p><p><b>RESULTS</b>The average values of critical loads of all specimens reduced significantly after cycles loading (P < 0.05), and critical loads declined with diminishing thickness of the core ceramic. The critical load of GI-II glass-infiltrated alumina ceramic was significantly higher than Empress II glass ceramic before and after cycle loading(P < 0.05).</p><p><b>CONCLUSION</b>Cycle loading can reduce the strengths of the two kinds of dental ceramic, and the latter is better than the former in the resistance to fracture and cyclic fatigue. Critical loads of the two kinds of dental ceramic are mainly influenced by the core ceramic's strength and thickness.</p>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Teste de Materiais
/
Cerâmica
/
Porcelana Dentária
/
Óxido de Alumínio
/
Vidro
Limite:
Humanos
Idioma:
Chinês
Revista:
West China Journal of Stomatology
Ano de publicação:
2009
Tipo de documento:
Artigo
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