Impression materials( Dental materials ) is of liquid or semi-solid nature when first mixed and placed in the mouth. It then sets to become an elastic solid (usually takes a few minutes depending upon the material), leaving an imprint of a person’s dentition and surrounding structures of the oral cavity. Academictask provides 2000+ basic and advanced level of dental materials MCQs with answers. In this section, we focus on all areas of MCQs on dental materials subject and cover all important topics of impression material like Amalgams, Dental Cements, Direct Filling Gold, Gypsum Products Mcqs, Impression Materials, Metallurgy, Physical Properties, Dental Ceramics & Miscellaneous, Restorative Resins – and much more. All these topics are chosen from trusted and best reference books on dental and impression materials. These dental materials MCQs are also helpful for the preparation of interviews, entrance examinations, other competitive examinations, and certifications for all Experienced, Freshers and Students. Also, check MCQs on Pathology here.
21. The imperfection seen on the lingual flange of a lower denture caused by rapid heating during a curing cycle is called_____________?
A. Localised Shrinkage porosity
B. Gas inclusion porosity
C. Micro porosity
D. Surface porosity
22. The particle size in microfilled composites is_____________?
A. 0.05 to 0.04mm
B. 0.5 to 1.0 microns
C. 0.01 to 0.1 microns
D. 0.3 to 0.4mm
23. Which of the following absorbs maximum amount of water ?
A. Microfilled resin
B. Macrofilled resin
D. Light cure activated
24. A material which is a mixture of two different materials and its properties are_____________?
B. Complex material
25. Co-efficient of thermal expansion is highest for_____________?
B. Silicate cement
C. Gold alloy
D. Acrylic resin
26. The latest method of curing denture base resins______________?
B. Visible light
27. One of the claims for the superiority composite resin restoration over silicate cement restorations is that the resin restorations_____________?
A. Prevent galvanic action
B. Are practically insoluble in oral fluids
C. Adapt to the walls of the cavity better
D. Have a higher coefficient of thermal expansion
28. To cure a heat cure resin, a proper heating cycle is necessary_____________?
A. To prevent the porosity
B. To prevent warpage
C. To prevent volume expansion
D. All of the above
29. When restoring a tooth with resin material, acid etching can do all of the following except______________?
A. Increase the surface area
B. Permit chemical bonding between resin and enamel
C. Create surface irregularities in enamel for better mechanical retention of resin
D. Condition the tooth surface for better wetting
30. For esthetic areas where high luster is required the restoration used usually______________?
A. Glass ionomer restoratives
B. Hybrid resin composites
C. Microfilled resin composites
D. Macrofilled resin composites