Effects of dental laboratory processing variables and in vitro testing medium on the porcelain adherence of high-palladium casting alloys ☆ ☆☆ ★ ★★ ♢ ♢♢ ♦

摘要: Abstract Purpose. This study assessed the effects of dental laboratory processing variables and testing medium on porcelain adherence representative high-palladium alloys. Material methods. The were recasting two three times, stripping with hydrofluoric acid rebuilding, changing recommended oxidation procedures. was air for these four groups nontreatment group. In last group, specimens stored tested in artificial saliva. metal ceramic fractured biaxial flexure constant strain. area fraction adherent (%) calculated a standardized spectrometric technique. A gold-palladium alloy served as control. Results. Recasting without adding new negatively affected some Porcelain did not cause decrease alternate treatment reduced significantly Au-Pd one Pd-Cu-Ga alloy. Storage saliva affect exhibited highest adherence. (J Prosthet Dent 1998;79:514-9.)