A. Polymerization shrinkage is greater if bonded surface area is lesser than unbounded surface area
B. Polymerization shrinkage is high if within the enamel margins
C. Acid etching and priming will decrease polymerization shrinkage
D. Microleakage can occur because of polymerization shrinkage
Related Mcqs:
- What is the polymerization shrinkage if 3:1 powder: liquid ratio is used____________?
A. 6%
B. 8%
C. 10%
D. 21% - Which of the following procedure is indicated to produce cross-linking in the polymerization of linear chains of acrylic_______________?
A. Addition of grain refining agents
B. Addition of difunctional monomers
C. Increasing the amount of heat required for linear polymerization
D. Incorporation of terminating agents - The polymerization of self-curing resin takes faster in______________?
A. Cold water
B. Hot water
C. Under pressure
D. In vaccum - All of the following statements about the differences between self-polymerizing acrylic resins and heat-cured resins are true EXCEPT______________?
A. The former have a lower molecular weight
B. The former have higher residual monomer content
C. The former are more porous
D. The former have greater transverse strength - Along with polymerisation shrinkage, one of the major disadvantages of polymethyl methacrylate as denture base resin are its poor_____________?
A. Biological properties
B. Thermal properties
C. Mechanical properties
D. Esthetic properties - The restoration which shows percolation and shrinkage along the margins is_____________?
A. Composites
B. Unfilled resins
C. Amalgam
D. Polycarboxylate - All of the following statements are true for zinc oxide eugenol cements except______________?
A. Equal lengths of base paste and accelerator paste are mixed together until the mix has a uniform colour
B. Increase in temperature and humidity shorten the setting time
C. The mix appear thick at the start of mixing but after 30 seconds of additional spatulation it becomes more fluid
D. Water accelerates but heat retards the setting of zinc oxide eugenol cements
E. Both C & D - The maximum shrinkage during firing proces in ceramic occurs in__________________?
A. High Bisque stage
B. Low Bisque stage
C. Medium Bisque stage
D. Fusion stage - The linear solidification shrinkage of Type IV Ni-Cr based alloys is_______________?
A. 2.3%
B. 1.56%
C. 1.37%
D. 3% - Casting shrinkage is compensated by_______________?
A. Thermal expansion
B. Hygroscopic expansion
C. Wax expansion
D. All of the above
