Dental Materials Exam 1 Questions and Answers Latest Version Already Passed

Dental Materials Exam 1 Questions and Answers Latest Version Already Passed What property describes a material’s ability to resist breaking under tension? Tensile strength What is the term for how well a material returns to its original shape after deformation? Elasticity Which dental material undergoes an exothermic reaction when setting? Gypsum What causes dimensional change in alginate if left exposed to air? Evaporation of water What must be done to alginate impressions to prevent distortion? Pour them immediately 2 Which material is most commonly used for study models? Model plaster What dental material sets by a chemical reaction between base and catalyst? Elastomeric impression material Which component in dental amalgam provides strength and reduces corrosion? Silver What component in amalgam increases expansion and reduces setting time? Tin What process describes mixing amalgam in a mechanical device? Trituration What is the role of the matrix in composite resin? Binds filler particles together 3 What increases the wear resistance in a composite resin? Filler particles What is the function of a coupling agent in composites? Bonds filler to resin What happens if etching is not thoroughly rinsed from enamel? Poor bond strength What should be done immediately after acid etching? Apply bonding agent Which dental cement releases fluoride over time? Glass ionomer What type of cement is commonly used as a base under restorations? Zinc phosphate 4 What material is used to calm the pulp before placing a restoration? Calcium hydroxide Which impression material is most hydrophilic? Alginate Which dental material is most affected by syneresis and imbibition? Alginate What is syneresis in an impression material? Loss of water causing shrinkage What term describes a material’s ability to flow under pressure? Viscosity Which gypsum product has the least expansion upon setting? Die stone