Dental Materials Chapter 2 Exam Questions With Complete
Solutions
a change in the size of matter. For dental materials, this usually
manifests as expansion caused by heating and contraction
casued by cooling Correct Answer dimensional change
a fracture resulting from repeated stresses that produce
microscopic flaws that grow Correct Answer fatigue failure
a life-like quality Correct Answer vitality
a material's ability to maintain its position without displacement
under stress Correct Answer retention
an electrical current transmitted between two dissimilar metals
Correct Answer galvanism
bending caused by combination of tension and compression
Correct Answer flexural stress
biocompatibility Correct Answer the ability of a material that
allows it to not impede or adversely affect living tissue
bonding retention Correct Answer occurs when the tooth
surface is prepared through the use of and acid-etch technique to
create microscopic pores in enamel and dentin
chemical retention Correct Answer dental cements; retain the
restoration (a crown)
, chroma Correct Answer the intensity or strength of the color,
teeth are rather pale in color (bold color has more, pastel color
has less)
compressive & tensile strengths of acrylic Correct Answer
11,000 lbs/in2
8000 lbs/in2
compressive & tensile strengths of amalgam Correct Answer
45,000-64,000 lbs/in2
7000-9000 lbs/in2
compressive & tensile strengths of composite resin Correct
Answer 30,000-60,000 lbs/in2
6000-9000 lbs/in2
compressive & tensile strengths of dentin Correct Answer
43,000 lbs/in2
4500 lbs/in2
compressive & tensile strengths of enamel Correct Answer
56,000 lbs/in2
1500 lbs/in2
compressive & tensile strengths of porcelain Correct Answer
21,000 lbs/in2
5400 lbs/in2
deterioration of a metal caused by a chemical attack or
electrochemical reaction with dissimilar metals in the presence
Solutions
a change in the size of matter. For dental materials, this usually
manifests as expansion caused by heating and contraction
casued by cooling Correct Answer dimensional change
a fracture resulting from repeated stresses that produce
microscopic flaws that grow Correct Answer fatigue failure
a life-like quality Correct Answer vitality
a material's ability to maintain its position without displacement
under stress Correct Answer retention
an electrical current transmitted between two dissimilar metals
Correct Answer galvanism
bending caused by combination of tension and compression
Correct Answer flexural stress
biocompatibility Correct Answer the ability of a material that
allows it to not impede or adversely affect living tissue
bonding retention Correct Answer occurs when the tooth
surface is prepared through the use of and acid-etch technique to
create microscopic pores in enamel and dentin
chemical retention Correct Answer dental cements; retain the
restoration (a crown)
, chroma Correct Answer the intensity or strength of the color,
teeth are rather pale in color (bold color has more, pastel color
has less)
compressive & tensile strengths of acrylic Correct Answer
11,000 lbs/in2
8000 lbs/in2
compressive & tensile strengths of amalgam Correct Answer
45,000-64,000 lbs/in2
7000-9000 lbs/in2
compressive & tensile strengths of composite resin Correct
Answer 30,000-60,000 lbs/in2
6000-9000 lbs/in2
compressive & tensile strengths of dentin Correct Answer
43,000 lbs/in2
4500 lbs/in2
compressive & tensile strengths of enamel Correct Answer
56,000 lbs/in2
1500 lbs/in2
compressive & tensile strengths of porcelain Correct Answer
21,000 lbs/in2
5400 lbs/in2
deterioration of a metal caused by a chemical attack or
electrochemical reaction with dissimilar metals in the presence
