Influence of casting procedures on the corrosion resistance of clinical dental alloys containing palladium☆

Corrosion resistance assessment of Co-Cr alloy frameworks fabricated by CAD/CAM milling, laser sintering, and casting methods

“…8 A potentiostat-galvanostat system (Model 6011D; CH Instruments Inc) connected to a computer was used to carry out electrochemical measurements at 37 C in a 25 mL artificial saliva solution (Fusayama-Meyer), 33 which was buffered with lactic acid to a pH of 5.3 (open to atmosphere). The artificial saliva solution was freshly prepared before each experiment and was composed of 0.400 g NaCl; 0.400 g KCl; 0.906 g CaCl 2 , 2H 2 O; 0.690 g NaH 2 PO 4 , 2H 2 O; 0.005 g Na 2 S, 9H 2 O; and 1.000 g urea and diluted with deionized water to 1000 mL.…”

“…Several studies have previously investigated corrosion and electrochemical characteristics of cast Co-Cr alloys. 8,26,[28][29][30][31][32][33][34][35] However, only a few studies evaluating corrosion resistance and electrochemical properties of the alloys produced by conventional casting, milling, and laser sintering methods have been reported. 36,37 The purpose of the present study was to evaluate electrochemical corrosion resistance of Co-Cr specimens produced by casting, CAD/CAM milling, and DMLS methods in a medium simulating the oral environment.…”

The Effect of Recasting on Bond Strength between Porcelain and Base-Metal Alloys

“…Although there has been no similar study comparing these two alloys, Huang et al showed that the trademark of Ni‐Cr‐Be alloys had no effect on the metal ceramic bond 15 . Most studies on the effect of recasting base‐metal alloys and the rate of corrosion and cell toxicity have shown that using 50% recast alloy increases corrosion of the alloy and cell toxicity 22–24 . Moreover, the time and cost required to clean the button and sprue and remove the investment for reusing challenge the choice of recasting base‐metal alloys.…”

Preferential dissolution behaviour in Ni-Cr dental cast alloy

“…The defects of dental cast alloys are mainly shrinkage porosity, inclusions, micro cracks and dendritic structure. Few reported works were available on the influence of casting procedures on the corrosion resistance of different dental alloys (Cohen et al 1996;Mulders et al 1996;Viennot et al 2006;Kim et al 2007;Saji et al 2009).…”