0
Q
What is hardness?
A
Surface resistance to scratching and indentation
1
Q
What is abrasion?
A
Removal of surface layers when two surfaces make frictional contact.
e.g. grinding of teeth
Results in a rough surface which is not good for plaque retentive factor
2
Q
What is fracture strength?
A
The stress at which the material fails due to fracture
3
Q
What is the elastic limit?
A
The maximum stress a material can undergo without plastic (permanent) deformation
4
Q
What is the ultimate tensile strength?
A
The maximum strength a material can withstand before failing/breaking
5
Q
What is ductility?
A
A solid material’s ability to deform under tensile stress prior to fracture
BDS2: Dental Material Science
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