Alloys For Metal-Ceramic Prosthesis Flashcards Preview

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Flashcards in Alloys For Metal-Ceramic Prosthesis Deck (22)
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0
Q

Other names for metal-ceramic alloys

A

PFM, PBM, PTM

1
Q

Three common features of metal-ceramic alloys

A

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

2
Q

Three reasons why alloys for all-metal restorations CANNOT BE USED for metal-ceramic restorations

A

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

3
Q

Metal-ceramic alloy ideal for single unit or 3-unit FPDs

A

Au-Pt-Pd

4
Q

Metal-ceramic alloy capable of greening phenomenon due to Ag vapor release and deposition in porcelain

A

Au-Pd-Ag (15-16% Ag)

5
Q

White-colored Metal-ceramic alloy

A

Au-Pd-Ag (15-16% Ag)

6
Q

Metal-ceramic alloy which is economical alternative to Au-Pt-Pd

A

Au-Pd-Ag (15-16% Ag)

7
Q

Metal-ceramic alloy Comparable to Au-Pt-Pd with better resistance

A

Au-Pd

8
Q

Metal-ceramic alloy with Good castability, corrosion resistance and adherence with porcelain

A

Au-Pd

9
Q

Metal-ceramic noble alloy with which the popularity has diminished because if price volatility of Pd

A

Pd-Au alloy

10
Q

Metal-ceramic noble alloy that can discolor porcelain

A

Pd-Au-Ag

11
Q

First gold-free noble alloy, discolors porcelain, low specific gravity, acceptable adherence to porcelain, more economical

A

Pd-Ag

12
Q

Metal-ceramic noble alloy with high yield strength, not well accepted because of black or brown oxide during oxidation and porcelain firing

A

Pd-Cu-Ga

13
Q

Most recent Metal-ceramic noble alloy; slightly lighter-colored oxide formed; compatible with lower expansion porcelains

A

Pd-Ga-Ag

14
Q

Denser, Ni-Cr or type 3 gold alloy?

A

type 3 gold alloy

15
Q

Fusion temp, Ni-Cr or type 3 gold alloy?

A

Ni-Cr

16
Q

Tensile strength, Ni-Cr or type 3 gold alloy?

A

Ni-Cr = type 3 gold alloy

17
Q

Proportional limit, Ni-Cr or type 3 gold alloy?

A

Ni-Cr = type 3 gold alloy

18
Q

Modulus of elasticity, Ni-Cr or type 3 gold alloy?

A

Ni-Cr

19
Q

Casting shrinkage, Ni-Cr or type 3 gold alloy?

A

Ni-Cr

20
Q

Hardness, Ni-Cr or type 3 gold alloy?

A

Ni-Cr

21
Q

Biocompatibility, Ni-Cr or type 3 gold alloy?

A

type 3 gold alloy