Dental impression materials, also known as dental materials, initially exist in a liquid or semi-solid state upon mixing and placement in the mouth. Over a few minutes, these materials undergo a setting process, transforming into an elastic solid. During this time, they capture an accurate imprint of an individual’s dentition and the surrounding structures within the oral cavity. GuruMCQs.com provides all updated Dental Materials MCQs. MCQs of dental materials content are updated regularly, with the addition of new topics, more questions, and useful links. Repeated dental materials MCQs consist of impression materials like Amalgams, Dental Cements, Direct Filling Gold, Gypsum Products MCQs, Impression Materials, Metallurgy, Physical Properties, Dental Ceramics & Miscellaneous, Restorative Resins – and much more. These multiple-choice questions (MCQs) in dental materials serve as valuable resources for various purposes such as interview preparation, entrance exams, competitive assessments, and certifications for individuals at all levels of experience, including experienced professionals, newcomers, and students. Additionally, you can find MCQs on oral histology for further exploration.
51. The base constituents of dental waxes come from three main sources except______________?
A. Animal
B. Mineral
C. Insect
D. Vegetable
52. The standard perforated tray for us with alginate impression materials may be brought to more customized contour by_______________?
A. Utility wax
B. Base plate wax
C. Beading wax
D. Boxing wax
53. The porosity formed due to simultaneous nucleation of solid grains and gas bubbles at the first moment that metal freezes at the mold walls is called__________?
A. Pinhole porosity
B. Gas inclusion porosity
C. Micro porosity
D. Subsurface porosity
54. Function of carnauba wax_________________?
A. To provide a smooth and glossy surface
B. Increase toughness
C. Decrease toughness
D. Decrease flow at room temperature
55. Reduction in the fusion temperature of dental gold casting alloys is caused by presence of______________?
A. Platinum
B. Copper
C. Silver
D. Gold
56. Softening heat treatment of alloy increases_________________?
A. Tensile strength
B. Proportional limit
C. Ductility
D. Hardness
57. The function of a sprue is to_______________?
A. Form an opening of molten metal to enter the mold
B. Help polish cast restorations
C. Eliminate air bubbles on the wax pattern
D. Reproduce fine detail
58. Stabilization of stainless steel is achieved by adding____________?
A. Carbon
B. Chromium
C. Nickel
D. Titanium
59. The yield strength of AUstenite (NiTi alloy) is______________?
A. 100 Mpa
B. 240 Mpa
C. 560 Mpa
D. 700 Mpa
60. A highly polished surface on a metallic dental restoration aids considerably in the prevention of the____________?
A. Dimensional change
B. Thermal conductivity
C. Warpage
D. Tarnish and corrosion