CDA GC Domain 4: Dental Materials Welcome to your CDA GC Domain 4: Dental Materials 1. CDA GC: Dental Materials When considering the manipulation of dental materials, what is the primary reason for incorporating a plasticizer into acrylic resins? A. To enhance the polymerization process B. To decrease the material's setting time C. To improve the material's flexibility D. To increase the material's hardness None 2. CDA GC: Dental Materials In dental materials, what is the significance of the term 'creep' when referring to amalgam fillings? A. The gradual change in shape under constant stress B. The expansion of the material over time C. The material's resistance to fracture D. The rate at which the material sets None 3. CDA GC: Dental Materials Which of the following dental materials is considered an indirect restorative material? A. Glass ionomer B. Composite resin C. Dental amalgam D. Porcelain None 4. CDA GC: Dental Materials What is the primary reason for using a coupling agent, such as silane, in composite resins? A. To increase the working time B. To improve the bond between the filler and the resin matrix C. To reduce the setting time D. To enhance color stability None 5. CDA GC: Dental Materials Which of the following properties is most crucial when selecting a dental material for fabricating a night guard? A. Compressive strength B. Tensile strength C. Flexural strength D. Hardness None 6. CDA GC: Dental Materials What role does the filler content play in the properties of composite resins? A. Higher filler content generally decreases the strength of the composite. B. Higher filler content reduces the wear resistance of the composite. C. Higher filler content usually increases the composite's thermal conductivity. D. Higher filler content typically enhances the composite's mechanical properties. None 7. CDA GC: Dental Materials When a dentist uses a dental dam during a procedure, what is the primary material from which dental dams are made? A. Polyethylene B. Latex C. Silicone D. Polystyrene None 8. CDA GC: Dental Materials In the context of dental cements, what is the primary function of eugenol in zinc oxide eugenol cement? A. It acts as a catalyst in the setting reaction. B. It provides antibacterial properties. C. It reduces the thermal conductivity. D. It serves as a plasticizer to improve malleability. None 9. CDA GC: Dental Materials Why is it important for dental professionals to understand the setting time of gypsum products used in dentistry? A. To ensure optimal mixing time B. To prevent premature setting during manipulation C. To maximize the material's compressive strength D. To adjust the material's color match to the tooth None 10. CDA GC: Dental Materials Which property of dental impression materials is critical for capturing fine detail in the impression? A. Elasticity B. Viscosity C. Tear strength D. Dimensional stability None 11. CDA GC: Dental Materials What is the primary function of a dental varnish when used beneath a dental restoration? A. To enhance the esthetic appeal of the restoration B. To improve the restoration's mechanical strength C. To reduce microleakage at the restoration margins D. To increase the thermal conductivity of the underlying tooth structure None 12. CDA GC: Dental Materials Why is it essential to control the powder-to-liquid ratio in glass ionomer cements? A. To modify the setting time B. To adjust the color of the cement C. To ensure optimal fluoride release D. To achieve the desired mechanical properties None 13. CDA GC: Dental Materials What is the primary concern when selecting a material for a dental core build-up? A. The material's esthetic qualities B. The material's ability to release fluoride C. The material's compressive strength D. The material's ease of removal None 14. CDA GC: Dental Materials In dental prosthetics, what is the significance of the coefficient of thermal expansion for dental materials? A. It determines the material's resistance to thermal shock. B. It affects the material's ability to bond with adhesives. C. It impacts the material's fit and comfort over time. D. It influences the wear resistance of the material. None 15. CDA GC: Dental Materials What is the role of a catalyst in a dental polymerization reaction? A. To accelerate the setting time B. To increase the material's hardness C. To enhance the material's color stability D. To improve the material's biocompatibility None 16. CDA GC: Dental Materials When selecting a material for an indirect dental restoration, what is a critical property that affects its longevity? A. Opacity B. Solubility C. Fluorescence D. Radiopacity None 17. CDA GC: Dental Materials In the context of dental adhesives, what is the purpose of applying an acid etchant before the adhesive? A. To clean the tooth surface B. To enhance the mechanical retention of the adhesive C. To change the color of the adhesive for better visibility D. To increase the setting time of the adhesive None 18. CDA GC: Dental Materials What is the primary reason for incorporating fibers into some dental composite resins? A. To reduce the material's viscosity B. To enhance the material's esthetic properties C. To improve the material's fracture toughness D. To decrease the material's setting time None 19. CDA GC: Dental Materials In dental material science, why is the wear resistance of a restorative material important? A. It determines the material's ability to withstand forces of mastication. B. It affects the thermal conductivity of the material. C. It influences the material's radiopacity. D. It determines the ease of material removal during replacement. None 20. CDA GC: Dental Materials What factor is crucial when selecting a dental liner under a composite restoration? A. The liner's opacity B. The liner's thermal expansion coefficient C. The liner's ability to release fluoride D. The liner's adhesive properties None 1 out of 20 Time is Up! Time's up
