dental materials MCQs – Page 21

Practise focused dental materials questions with marked answers for exam preparation and subject revision.

dental materials Mcqs

401. The advantage of ZOE impression paste_______________?
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A. Is easy manipulation

B. Has dimensional stability

C. Does not require special trays

D. Does not adhere to tissues

402. Alginate impression material is________________?
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A. Non-elastic impression material

B. More mucostatic than ZOE

C. Less mucostatic than ZOE

D. Thermoplastic impression material

403. Most biocompatible material in oral cavity is_______________?
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A. Titanium

B. Palladium

C. Gold

D. Platinium

404. Waxes are used for_______________?
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A. Corrective impressions

B. Primary impression

C. Impression of single tooth

D. None of the above

405. The function of 2% potassium sulphate in a gypsum product is_____________?
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A. Regulate setting time

B. To regulate the setting expansion

C. None

D. Acts as retarder

406. The main ingredient of inlay wax is__________________?
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A. Carnauba wax

B. Candellila wax

C. Paraffin wax

D. Gum dammar

407. The impression with the least dimensional change upon disinfection is_______________?
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A. Polysulphide

B. Agar-agar

C. Addition poly silicone

D. Polyether

408. The Zinc oxide-eugenol impression pastes harden by________________?
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A. Pressure

B. Chemical reaction

C. Heat

D. Cold

409. Nickel-Titanium alloy has__________________?
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A. Unreliable spring back

B. Minimal spring back

C. None of the above

D. low spring back

410. Syneresis seen in hydrocolloid gel is______________?
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A. Shrinkage

B. Gelation

C. Water absorption

D. Seen as water loss

411. The effects associated with cold working can be eliminated by a heat treatment called______________?
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A. Homogenization heat treatment

B. Annealing heat treatment

C. Age hardening heat treatment

D. Solution heat treatment

412. Most mucostatic among the following_____________?
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A. Impression compound

B. ZOE paste

C. Elastomer

D. Alginate

413. Syringe material is______________?
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A. Medium viscosity elastomer

B. Medium & low viscosity elastomer

C. High viscosity elastomer

D. Low viscosity elastomer

414. Stabilization of stainless steel is achieved by adding____________?
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A. Chromium

B. Carbon

C. Titanium

D. Nickel

415. Mouth temperature waxes are_______________?
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A. None of the above

B. Green stick wax

C. Iowa wax

D. Modeling wax

416. The base constituents of dental waxes come from three main sources except______________?
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A. Mineral

B. Animal

C. Insect

D. Vegetable

417. All of the following statements about cast cobalt alloy are true EXCEPT_____________?
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A. They are more rigid than gold alloys

B. They have a lower proportional limit than gold alloys

C. They have a modulus of elasticity twice that of gold alloys

D. They have higher ductility than gold alloys

418. Cause of expansion in zinc containing amalgam is_____________?
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A. Zinc and water

B. Hydrogen

C. Nascent oxygen

D. Water

419. Porosity in porcelain at condensation stage depends on_________________?
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A. None of the above

B. Shape and size of particle

C. Uniform distribution of particle size

D. Number of particles

420. Which of the following silver amalgam alloy have the maximum strength________________?
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A. Admixed

B. Single composition

C. Spherical

D. Lathe cut

Showing 401 to 420 of 627 mcqs