Effect of three direct restorative materials on molar cuspal fracture resistance.
Am J Dent
; 17(4): 228-32, 2004 Aug.
Article
em En
| MEDLINE
| ID: mdl-15478480
ABSTRACT
PURPOSE:
This study compared the cusp fracture strength of molars restored using a condensable resin composite with that of teeth restored with conventional amalgam, a bonded amalgam, and an incrementally placed resin composite.METHODS:
Standardized MOD cavity preparations (2/3 the buccal-lingual dimension x 4 mm deep) were made in 50 extracted human molars and restored as follows (n = 10) (1) a packable posterior resin composite; (2) an incrementally placed microfilled posterior resin composite; (3) a spherical particle amalgam alloy; (4) spherical amalgam with a dentin adhesive liner and (5) no restoration (preparation only; negative control). A sixth group of intact molars (n = 10) served as a positive control. Following storage and thermocycling, each specimen was tested for cuspal fracture strength.RESULTS:
Cavity preparation reduced cuspal fracture strength by over 50%. The fracture strength of intact teeth was significantly greater than that of all other groups (P< 0.0001). None of the restorative procedures increased cuspal fracture resistance over that of prepared teeth.
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Base de dados:
MEDLINE
Assunto principal:
Fraturas dos Dentes
/
Resinas Compostas
/
Coroa do Dente
/
Amálgama Dentário
/
Restauração Dentária Permanente
/
Dente Serotino
Idioma:
En
Ano de publicação:
2004
Tipo de documento:
Article