The strength of Class II composite resin restorations as affected by preparation design / A força das restaurações de resina composta Classe II a partir do projeto de confecção
Quintessence int
; Quintessence int;25(4): 251-7, Apr. 1994. tab
Article
em En
| BBO
| ID: biblio-854117
Biblioteca responsável:
BR97.1
Localização: BR97.1
ABSTRACT
This study evaluated the load, applied to the marginal ridge, required to produce failure in Class II posterior composite resin restorations with four different preparation designs. In group 1, the preparation had an extension through the occlusal groove. The other three groups employed a proximal box-only (slot) preparation. Group 2 preparations had facial and lingual retention grooves that extended from the gingival floor to the occlusal surface; group 3 preparations were slots without grooves; and group 4 preparations were slots without grooves and with unsupported proximal enamel. After the restorations were thermocycled, their marginal ridges were flattened and loaded to failure. Mean (SD) failure loads were 438 (73) N in group 1; 383 (52) N in group 2; 297 (72) N in group 3; and 281 (63) N in group 4. Mean failure loads of groups 1 and 2 were not significantly differet from each other but were significantly greater than failure loads for groups 3 and 4. Mean failure loads of groups 3 and 4 were not significantly different
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Coleções:
06-national
Base de dados:
BBO
Assunto principal:
Resinas Compostas
/
Restauração Dentária Temporária
Limite:
Humans
Idioma:
En
Revista:
Quintessence int
Ano de publicação:
1994
Tipo de documento:
Article