Which of the following is the most soluble..
Amalgam
Glass Ionomer
Porcelain
Acrylic
What is Glass Ionomer
100
The safe interaction of a dental material with the rest of the body is defined as....
What is biocompatibility
100
The amount of force exerted from within an object
What is stress
100
applied when two surfaces slide against each other in opposite directions
What is shearing forces
100
Staining of resins and acrylics from repeated exposure to coffee, tea and other dyed beverages is due to
What is water sorption
200
Corrosion is of the greatest concern for which of the restorative materials?
What is amalgam
200
the amount of change that the force has produced
What is strain
200
Normal masticatory forces on the occlusal surfaces of molar teeth can increase to as much as ........... on each cusp tip.
What is 28,000 lbs per square inch
200
Something that allows the ingress of bacteria and oral fluids and may lead to recurrent caries, staining, and pulpal irritation
What is percolation
300
Surface discoloration of a metal restoration is
What is tarnish
300
the result of microscopic flaws that grow over time. Rarely occur in a single-force application; rather, they occur when stress is frequently repeated.
What is Fatigue Failure
300
measure of strength of muscles of mastication during normal chewing
What is biting force
400
The normal resting pH of saliva ranges from 6.2 to....
What is 7
400
Which restorative material has the highest ultimate compressive strength?
What is amalgam (45,000 to 64,000 lbs/in2)
400
force applied in the opposite direction as an object is pulled or stretched
What is tensile force
500
this reaction will decrease with time as oxides form on the surface of the metal
What is galvanism
500
AKA bending stress, and is a combination of tension and compression