Comparison of the failure mode of various types of glass ionomer cements / 中华口腔医学杂志
Chinese Journal of Stomatology
;
(12): 687-689, 2006.
Artículo
en Chino
| WPRIM
| ID: wpr-293008
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the failure mode of various types of glass ionomer cements by Hertzian indentation test.</p><p><b>METHODS</b>Discs of 10 mm diameter and 2 mm thickness were prepared for six glass ionomer cement products (A-D conventional type setting through an acid-base chemical reaction, A and B without reinforcement, C with silver reinforcement, D with ceramic reinforcement; E and F resin-modified type), ten for each. These were tested on top of glass-reinforced polyamide-nylon 6, 6 substrates by a universal testing machine, loading centrally with a 20 mm diameter ball. Load at the first crack was recorded. Failure mode was observed under scanning electron microscope.</p><p><b>RESULTS</b>The former four products presented typical brittle fracture, while the latter two usually fractured incompletely. The failure loads at the first crack of the six glass ionomer cements were (258.86 +/- 10.49), (230.88 +/- 21.66), (281.90 +/- 25.39), (282.11 +/- 9.60), (756.67 +/- 83.50) and (1 148.00 +/- 147.78) N, respectively. Significant difference was found between the former four and the latter two products.</p><p><b>CONCLUSIONS</b>The type (setting mode) of glass ionomer cement controls its failure mode. Inclusion of metallic or ceramic filler has little effect on increasing the load bearing capacity of glass ionomer cement.</p>
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Resinas Sintéticas
/
Plata
/
Ensayo de Materiales
/
Química
/
Fuerza Compresiva
/
Porcelana Dental
/
Cementos de Ionómero Vítreo
/
Métodos
Idioma:
Chino
Revista:
Chinese Journal of Stomatology
Año:
2006
Tipo del documento:
Artículo
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