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Dental materials lec2

An educational illustration featuring a stress-strain curve and dental materials, showcasing mechanical properties like elasticity and toughness.

Understanding Dental Material Properties

Test your knowledge on the essential concepts of dental materials and understand their mechanical properties through this engaging quiz. Each question is designed to deepen your understanding of stress-strain curves, modulus of elasticity, and the implications for dental restorations.

  • 23 questions covering key topics
  • Multiple choice and checkbox formats
  • Ideal for dental students and professionals alike
23 Questions6 MinutesCreated by AnalyzingTooth5
The elastic portion of stress strain curve obeys hook’s law
True
False
In which portion of the strain the stress and strain will not be proportional to each other
Elastic
Linear
Non linear
Proportional limit is the greates stress the material withstand Without
Permanent deformation
Fracture
Deviation from hooks law
Proportional limit and elastic limit represents the same stress
True
False
When it happens it indicate clinical failure ( functional failure )
Yeild stress
Proportional limit
Fracture
Hooks law
In dentistry Ultimate stress is more important than yeild stress
True
False
The strength of material can be described by
PL,EL,YS,FS
PL
PL, EL, YS, US
Brittle fracture happens at Yeild stress
True
False
In which type of the fractures the tensile strength can be calculated directly
Brittle
Ductile
Sudden catastrophic fracture is a property of
Brittle fracture
Ductile fracture
Third Molar
It represents teh flexibility or stiffness of material
Modulus of Elasticity
Toughness
Resilience
The Modulus of elasticity depends on
Mechanical treatment
Heat treatment
Composition of material
In case of long span bridge we need
High E
Low E
The modulus of elasticity of a restoration should not match that of the tooth
True
False
Strain the occur when material is stressed to proportional limit
Stiffnes
Flexibility
Brittleness
Indierct tensile test
Dimetral compression test
Elongation test
Malleability and ductility : They indicate the workability of Ceramics
True
False
Malleability is The ability of materal to be plasticaly deformed under _______ without fracutre
Compression
Tension
Shearing
Which properties of these give us the ability to adjust the Clasp in a removable partial denture
Ductility and mallability
Brittleness
Toughness
The area under the straight portion in stress strain curve represents
Resilience
Toughness
Ductility
The amount of energy required to stress the material to its point of fracture
Resilience
Ductility
Toughness
Gold alloys can not perform plastic deformation because they are brittle
False
True
Describe the properties of the curve
Stiff, ductile, strong,tough
Flexible , brittle, weak
Stiff, brittle,strong,tough
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