Roughness and porosity of provisional crowns
RPG rev. pos-grad
;
18(2): 108-112, abr.-jun. 2011. ilus, graf
Artigo
em Inglês
| LILACS
| ID: lil-679849
RESUMO
This study aimed at evaluating the surface roughness and porosity of an acrylic resin used for provisional crowns. Six different processing techniques (direct and indirect) were assessed: (I) heat-cured acrylic resin under pressure; (II) heat-aided autopolymerizing resin under pressure; (III) autopolymerizing resin under pressure; (IV) bead-brush technique; (V) autopolymerizing resin in sandy stage; (VI) autopolymerizing resin in plastic stage. Twelve specimens were made for each test group. Roughness was evaluated with a rugosimeter, and porequantification was performed using a stereoscopic magnifying lens. The highest mean surface roughness (Ra = 0.908 mm) was measured for Group VI. The lowest surface roughness value (Ra = 0.141 mm) was determined for Group I. Significant differences in mean surface roughness were found between direct and indirect techniques. Direct techniques reached the highest roughness and porosity values; its use should be restricted to avoid creating favorable conditions for microorganism proliferation
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LILACS (Américas)
Assunto principal:
Ortodontia
/
Prótese Dentária
/
Coroa do Dente
/
Restauração Dentária Temporária
/
Odontologia
Idioma:
Inglês
Revista:
RPG rev. pos-grad
Ano de publicação:
2011
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade Federal de Alfenas/BR
/
Universidade de São Paulo/BR
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