Strength properties of preceramic brazed joints of a gold-palladium alloy with a microwave-assisted oven and gas/oxygen torch technique.
J Prosthet Dent
; 112(3): 606-12, 2014 Sep.
Article
en En
| MEDLINE
| ID: mdl-24656408
ABSTRACT
STATEMENT OF PROBLEM:
The effect of microwave brazing on the strength properties of dental casting alloys is not yet known.PURPOSE:
The purpose of this study was to compare the strength properties of preceramic brazed joints obtained by using a microwave oven and a conventional torch flame for a high noble alloy (Au-Pd). MATERIAL ANDMETHODS:
A total of 18 tensile bars made of an Au-Pd ceramic alloy were fabricated. Six specimens were cut and joined with a high-fusing preceramic solder in a specially designed microwave oven, and 6 specimens were joined with a conventional natural gas/oxygen torch. The remaining 6 uncut specimens were tested as a control. All the specimens were subjected to testing with a universal testing machine. A 1-way ANOVA was performed for each strength property tested.RESULTS:
The tensile strength of the uncut group was the highest (745 ±19 MPa), followed by the microwave group (420 ±68 MPa) and the conventional torch group (348 ±103 MPa) (P<.001); however, no significant difference in tensile strength was found between the microwave group and gas torch group. The tensile strength of the microwave group exceeded ANSI/ADA Standard No. 88, Dental Brazing Alloys (a joint standard of the American National Standards Institute and the American Dental Association).CONCLUSIONS:
The microwave heating preceramic solder method demonstrated the excellent tensile strength of an Au-Pd alloy and may be an alternative way of joining alloys when a torch flame is contraindicated.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Paladio
/
Soldadura Dental
/
Aleaciones de Oro
/
Microondas
Límite:
Humans
Idioma:
En
Revista:
J Prosthet Dent
Año:
2014
Tipo del documento:
Article