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22 Cards in this Set

  • Front
  • Back
Silica based restorations are:
a. translucent
b. brittle
c. opaque
d. strong
Silica restorations are:
Translucent & Brittle
Alumina and zirconia are:
a. weak ceramic materials used to laminate (place on top of, coat FS restorations)
b. Strong ceramic materials that are used to fabricate strong cores for all ceramic restoration
c. fruit extracts
d. acrylic derivatives for the enhancement of ceramic crowns
Strong ceramic materials used to fabricate strong cores for all ceramic restorations
What are the main disadvantages of alginates compared with rubber materials?
Not much surface detail
need quick pour up
What are the most common noble metals used in alloys?
Pd, Au, Pt
Which metal or metals increase ductility?
Gold
What are the classifications of impression materials?
Rigid impression materials (non elastic)
Elastic impression materials
hydrocolloid
non-aqueous elastomers
Which of the following statements is not true for monomers?
a. molecular weight of 100
b. volatile liquid
c. not toxic
d. boiling point 100 degrees C
e. sweet odor
C. not toxic
Which of the following statements is not true for the initiator of the polymerization reaction?
A. IS ORGANIC PEROXIDE
B. DECOMPOSED INTO FREE RADICALS
C. CAN BE DECOMPOSED BY ORGANIC AMINES
D. DECOMPOSED BY HEATING
E. DECOMPOSED BY INORGANIC ACCELERATORS
E. DECOMPOSED BY INORGANIC ACCELERATORS
Resistance to fracture of acrylic polymers can be improved by?
Butadiene-styrene rubber
butyl methacrylate
The main component of the acrylic denture base powder material is?
polymethyl methacrylate
Describe the chemical reaction of gypsum
Hemihydrate + H2O -> dihydrate (gypsum) + heat
CaSO4*1/2H2O + 1 1/2H2O -> CaSO4*2H2O + heat
The hardness of dental materials is reported in?
knoop hardness
The affinity of a liquid for a solid is used as a measure for?
wettability
When waxes are heated, they expand significantly. This expansion can be quantified as:
Parts per million of expansion per C degree
coefficient of thermal expansion
Increasing the inorganic filler particles would:
Improve the physical chem and mech properties of the matrix
Decrease the polymerization shrinkage
Reduce the coefficient of thermal expansion
T/F the primer has both hydrophobic and hydrophilic properties
True
Dental amalgam wears at a rate similar to
tooth structure
What lights will polymerize composites?
1) Blue Light
2) UV Light
3) Sun Light

(NOT infrared light)
What are the main disadvantages of alginates compared with rubber materials?
Not much surface detail
Need Immediate Pour up
What are the most common noble metals used in alloys?
Pd, Au, Pt
Which metal or metals increase ductility?
Gold
What is the classification of the impression materials?
Rigid Impression materials (non-elastic)
Elastic impression materials (Hydrocolloid)
Non-aqueous elastomers