Spectral transmittance of GI-II glass/alumina composite / 华西口腔医学杂志
West China Journal of Stomatology
; (6): 367-369, 2002.
Artigo
em Chinês
| WPRIM (Pacífico Ocidental)
| ID: wpr-279608
Biblioteca responsável:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>The purposes of this study were to determine the spectral transmittance of GI-II glass/alumina composites and to explore the effects of different specimen thickness and fining arts of glass infiltration on the transmittance. Data were compared with those of Vita In-Ceram Alumina materials.</p><p><b>METHODS</b>Plate-shaped specimens 12.5 mm in diameter, with 3 thickness (0.5, 1.0, 1.5 mm), 6 color groups for GI-II and 4 color groups for Vita In-Ceram Alumina were fabricated. Specimens of color AL2 for In-Ceram and IG2 for GI-II were selected in the study of relationship between different infiltration arts and transmittance. Five infiltration time duration and three temperatures were studied. A spectrophotometer with standard A light source paralleled light beam 5 mm in diameter and spectra range 380-780 nm was employed to measure the spectral transmittance.</p><p><b>RESULTS</b>The range of spectral transmittance were 2.7%-4.5% for GI-II and 2.4%-5.2% for Vita In-Ceram Alumina. Transmittance decreased with specimen thickness, but they were not linearly related. Transmittance of GI-II tended to increase and that of Vita In-Ceram Alumina decreased as the infiltration temperature elevated. The transmittance increased with infiltration time less than 4 hours and reduced with prolonged time over 6 hours for both materials.</p><p><b>CONCLUSION</b>GI-II glass/alumina composite has comparatively lower translucency. Influences of factors as color, thickness and infiltration arts on translucency of restorations should be considered in the clinical selection of the all-ceramic materials.</p>
Texto completo:
Disponível
Base de dados:
WPRIM (Pacífico Ocidental)
Assunto principal:
Espectrofotometria
/
Temperatura
/
Resistência à Tração
/
Cerâmica
/
Química
/
Materiais Dentários
/
Porcelana Dentária
/
Temperatura de Transição
/
Óxido de Alumínio
/
Vidro
Idioma:
Chinês
Revista:
West China Journal of Stomatology
Ano de publicação:
2002
Tipo de documento:
Artigo