[Determination and Weibull analysis of the strength of dental veneering porcelains].
OBJECTIVE
To determine the strength of the veneering porcelain stored in artificial saliva.


METHODS
Standard beams with a size of 3 mm x 2 mm x 20 mm made from the body, incisal, and translucent porcelains of SHOFU Vintage were stored in the artificial saliva for 30 days. Twenty samples from each material were tested for the strength by the 3-point flexural test at a crosshead speed of 0.5 mm. The data were analyzed by the two-parameter Weibull method.


RESULTS
The strength, Weibull modulus (m) and characterization strength (male0) were (75.5 +/- 5.6) MPa, 17.3, and 77.6 MPa for Body porcelain, respectively; (73.6 +/- 5.0) MPa, 16.5, and 76.0 MPa for incisal porcelain, respectively; and (72.9 +/- 4.5) MPa, 16.1, and 75. 5 MPa for translucent porcelain, respectively.


CONCLUSIONS
There are no differences in strength between the three dental porcelains. Weibull analysis describes the strength of the porcelains better than the average and standard deviation.
Teng
Ji-li
JL
Department of Prosthodontics, West China School of Stomatology, Sichuan University, Chengdu 610041, China.
Luo
Lin
L
He
Li-hong
LH
Wang
Hang
H
Chao
Yong-lie
YL
D003776:Dental Porcelain / Q000032:analysis*; D003799:Dental Stress Analysis / Q000379:methods*; D003801:Dental Veneers; D008422:Materials Testing / Q000379:methods; D012464:Saliva, Artificial; D013314:Stress, Mechanical
D012464:Saliva, Artificial; D003776:Dental Porcelain