Ol. Bezzon et al., EFFECT OF BERYLLIUM ON THE CASTABILITY AND RESISTANCE OF CERAMOMETAL BONDS IN NICKEL-CHROMIUM ALLOYS, The Journal of prosthetic dentistry, 80(5), 1998, pp. 570-574
Statement of problem. Castability and ceramometal bond resistance play
an important role in accepting nickel-chromium alloys as a substitute
for gold alloys in dentistry. Purpose. This study was developed to ve
rify the effect of beryllium on these factors in several compositions
of nickel-based alloys by submitting them to castability and ceramomet
al bonding resistance tests. Material and methods. Three experimental
compositions of Ni-Cr allays with different amounts of beryllium were
used. One beryllium-free alloy was used as the control. Results. Analy
sis of variance and Tukey's test showed significant differences (alpha
=.001) for the castability test results and significant differences (a
lpha=.05) for ceramometal bond resistance between alloys. Conclusions.
Although the amounts of chromium, manganese, and niobium were maintai
ned, the variations in the amounts of beryllium allowed the estimation
that Be-containing alloys presented better castability than Be-free a
lloys. The 0.9% Be-containing alloy demonstrated higher resistance of
the ceramometal bond than the Be-free alloy.