Type III gold alloy complete crowns cast in a phosphate-bonded investment.
J Prosthet Dent
; 46(4): 414-9, 1981 Oct.
Article
em En
| MEDLINE
| ID: mdl-7028956
ABSTRACT
A phosphate-bonded investment and a calcium sulphate-bonded investment were evaluated for the surface smoothness and marginal fit they impart to type III gold castings. The phosphate-bonded investment was used with burnout temperatures of 900 degrees F and 1,300 degrees F. The results of this study lead to the following conclusions:
1. The marginal fit with the phosphate-bonded investment method was superior to that obtained with the calcium sulphate-bonded investment. 2. Surface roughness was greater for the castings made with the phosphate-bonded investment when measured with SEM photographs and visual observation. 3. The phosphate bonded-investment increased the incidence of nodules on the surface of the castings. 4. No correlation was demonstrated between marginal fit and surface roughness or the incidence of nodules on the castings.
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Base de dados:
MEDLINE
Assunto principal:
Técnica de Fundição Odontológica
/
Coroas
/
Revestimento para Fundição Odontológica
/
Ligas de Ouro
Limite:
Humans
Idioma:
En
Revista:
J Prosthet Dent
Ano de publicação:
1981
Tipo de documento:
Article