Factors affecting the bond strength of denture base and reline acrylic resins to base metal materials
J. appl. oral sci
; J. appl. oral sci;21(4): 320-326, Jul-Aug/2013. tab
Article
em En
| LILACS
| ID: lil-684572
Biblioteca responsável:
BR1.1
ABSTRACT
OBJECTIVE:
The shear bond strengths of two hard chairside reline resin materials and an auto-polymerizing denture base resin material to cast Ti and a Co-Cr alloy treated using four conditioning methods were investigated. MATERIAL ANDMETHODS:
Disk specimens (diameter 10 mm and thickness 2.5 mm) were cast from pure Ti and Co-Cr alloy. The specimens were wet-ground to a final surface finish of 600 grit, air-dried, and treated with the following bonding systems 1) air-abraded with 50-70-µm grain alumina (CON); 2) 1) + conditioned with a primer, including an acidic phosphonoacetate monomer (MHPA); 3) 1) + conditioned with a primer including a diphosphate monomer (MDP); 4) treated with a tribochemical system. Three resin materials were applied to each metal specimen. Shear bond strengths were determined before and after 10,000 thermocycles.RESULTS:
The strengths decreased after thermocycling for all combinations. Among the resin materials assessed, the denture base material showed significantly (p<0.05) greater shear bond strengths than the two reline materials, except for the CON condition. After 10,000 thermocycles, the bond strengths of two reline materials decreased to less than 10 MPa for both metals. The bond strengths of the denture base material with MDP were sufficient 34.56 MPa for cast Ti and 38.30 for Co-Cr alloy.CONCLUSION:
Bonding of reline resin materials to metals assessed was clinically insufficient, regardless of metal type, surface treatment, and resin composition. For the relining of metal denture frameworks, a denture base material ...Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
LILACS
Assunto principal:
Resinas Acrílicas
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Colagem Dentária
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Ligas Dentárias
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Bases de Dentadura
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Reembasamento de Dentadura
Idioma:
En
Revista:
J. appl. oral sci
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2013
Tipo de documento:
Article
/
Project document
País de publicação:
Brasil