Effect of cavity preparation design on the fracture resistance of directly and indirectly restored premolar
Braz. j. oral sci
;
7(27): 1636-1640, Oct.-Dec. 2008. tab, graf, ilus
Artículo
en Inglés
| LILACS, BBO
| ID: lil-521331
ABSTRACT
Aim:
The aim of this study was to evaluate the fracture resistance of human premolars with extensive cavity preparations of the inlay and onlay types, for performing direct and indirect composite resin restorations.Methods:
Eight-four premolars were divided into 7 groups (n=12) G1=intact teeth; G2=inlay/Filtek Z-250 direct; G3=inlay/ Filtek Z-250 light polymerized indirectly; G4=inlay/ Solidex; G5=onlay/ Filtek Z-250 direct; G6=onlay/ Filtek Z-250 light polymerized indirectly; G7=onlay/ Solidex. Indirect Filtek Z- 250 restorations were light activated using the EDG-lux oven. All samples were submitted to axial compression load in a Universal Testing Machine until fracture. The data were submitted to the one-way ANOVA and Tukeys test (a=0.05).Results:
The results (N) were G6-1938a, G5-1570ab, G7-1285b, G1-1215b, G4-1174b, G3-1146b and G2-1112b. The onlay cavities restored indirectly with Filtek Z-250 presented significantly higher fracture resistance (G6) than the other groups, except for onlay restorations made directly with Filtek Z-250 (G5), which, in turn, did not differ significantly from the other groups. However, the onlay restorations made with Filtek Z-250 led to more catastrophic failure modes.Conclusions:
1. Adhesive inlay restorations, irrespective of the type of composite resin and light-activation technique used, restored the fracture resistance of intact teeth.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Resinas Compuestas
/
Preparación de la Cavidad Dental
/
Restauración Dental Permanente
/
Incrustaciones
Límite:
Humanos
Idioma:
Inglés
Revista:
Braz. j. oral sci
Asunto de la revista:
Odontología
Año:
2008
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
State University of Montes Claros/BR
/
São Leopoldo Mandic Dental School-Unit/BR
/
University of Campinas/BR
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