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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, 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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