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WorksheetsOverview of Dental Materials
Total questions: 24
Worksheet time: 8mins
What is the resistance to deformation or fracture under stress called?
Strength
Elasticity
Plasticity
Ductility
What is the ability of a material to withstand sudden forces without breaking?
Impact Strength
Tensile Strength
Compressive Strength
Flexural Strength
What is the measure of a material's resistance to flow?
Viscosity
Thixotropy
Elasticity
Plasticity
What property indicates how much a material expands with temperature changes?
Coefficient of Thermal Expansion
Thermal Conductivity
Solubility
Reactivity
What is the ability of dental materials to resist dissolution in oral fluids called?
Solubility
Reactivity
Biocompatibility
Antimicrobial Properties
What is the term for materials that must be non-toxic and non-irritating to oral tissues?
Biocompatibility
Antimicrobial Properties
Density
Opacity
What is the ability of two different substances to bond together called?
Adhesion
Solubility
Elasticity
Plasticity
What is the ability to capture fine details of oral tissues in impression materials?
Accuracy
Dimensional Stability
Ease of Use
Biocompatibility
What type of impression material is often used for preliminary impressions?
Alginate
Polyvinyl Siloxane
Agar
Polysulfides
What is the main component of gypsum products used in dentistry?
Calcium sulfate hemihydrate
Silicone
Polysulfide
Alginate
What is the term for the ability of gypsum products to maintain shape and size over time?
Dimensional Stability
Accuracy
Strength
Biocompatibility
What are the types of gypsum-bonded investments?
Type I: For inlays and crowns
Type III: For inlays, onlays, and cowns
Type II: For partial dentures with gold alloys.
What are the requirements for investment materials?
Ductile
Refractoriness
Thermal contraction
Porosity
Smooth Surface Finish
What are the advantages of dental polymers?
Aesthetic Appeal
Ease of Manipulation
Heavy weight of appliance
What are the disadvantages of dental polymers?
Susceptibility to Wear
Water Absorption
Resist distortion
What are the key types of dental ceramics?
Feldspathic Porcelain
Glass-Matrix Ceramics
Polycrystalline Ceramics
Leucite Porcelain
What are the requirements for resin-based ceramics?
Sufficient mechanical strength to withstand occlusal forces.
Ability to mimic the appearance of natural teeth, including translucency and color matching.
Leaching fluoride in the oral cavity
What are the advantages of using ceramic brackets in orthodontics?
Excellent ability to mimic natural tooth appearance.
Generally safe for oral tissues.
Provides rapid tooth movement as compared to metal brackets
What are the disadvantages of zinc phosphate cement?
Does not bond chemically to tooth structure; relies on mechanical retention.
Prevents the polymerization of composite restorations
What is the composition of zinc oxide-eugenol cement?
Powder (zinc oxide) and liquid (eugenol, olive oil).
A mixture of metals, primarily silver, tin, copper, and mercury.
What are the applications of fluoride treatments?
Used in both professional settings and at home for caries prevention.
To improve the aesthetics of dentition.
Which is the most suitable material for obturating root canals in endodontics?
Gutta percha
CaOH
Zn oxide Eugenol
Silver points
Which impression technique allows for recording of flabby ridge under pressure?
Mucostatic
Mucocompressive
What is an important requirement of Wrought alloys?
Ductility
Dimensional stability
Coefficient of thermal expansion
