Alloys For Metal-Ceramic Prosthesis Flashcards
Other names for metal-ceramic alloys
PFM, PBM, PTM
Three common features of metal-ceramic alloys
Have the potential to bond to porcelain; possesses coefficient of thermal contraction compatible with those of porcelain; solid us temperature is high to permit the application of low-fusing porcelain
Three reasons why alloys for all-metal restorations CANNOT BE USED for metal-ceramic restorations
May not form thin, stable oxide layers (promotes atomic bonding to porcelain); melting range is too low; thermal contraction coefficients not close enough to those of porcelain
Metal-ceramic alloy ideal for single unit or 3-unit FPDs
Au-Pt-Pd
Metal-ceramic alloy capable of greening phenomenon due to Ag vapor release and deposition in porcelain
Au-Pd-Ag (15-16% Ag)
White-colored Metal-ceramic alloy
Au-Pd-Ag (15-16% Ag)
Metal-ceramic alloy which is economical alternative to Au-Pt-Pd
Au-Pd-Ag (15-16% Ag)
Metal-ceramic alloy Comparable to Au-Pt-Pd with better resistance
Au-Pd
Metal-ceramic alloy with Good castability, corrosion resistance and adherence with porcelain
Au-Pd
Metal-ceramic noble alloy with which the popularity has diminished because if price volatility of Pd
Pd-Au alloy
Metal-ceramic noble alloy that can discolor porcelain
Pd-Au-Ag
First gold-free noble alloy, discolors porcelain, low specific gravity, acceptable adherence to porcelain, more economical
Pd-Ag
Metal-ceramic noble alloy with high yield strength, not well accepted because of black or brown oxide during oxidation and porcelain firing
Pd-Cu-Ga
Most recent Metal-ceramic noble alloy; slightly lighter-colored oxide formed; compatible with lower expansion porcelains
Pd-Ga-Ag
Denser, Ni-Cr or type 3 gold alloy?
type 3 gold alloy
