Medical MCQs

5099 MCQs  (Page 52 of 510)

Etchant preferred in gel from than in liquid form________________?
A. Better control over placement
B. Enhance and concentrate the action of acid
C. Helps in visualization while placement
D. None of the above
Which of the following is NOT true of polymethyl methacrylate ?
A. Knoop hardness number 18 to 20
B. Tensile strength of 60 mpa
C. Density of 1.13 g/cm3
D. Modulus of elasticity of 3.4 gpa
What is the disadvantage of using composites as restorative material ?
A. Increased thermal conductivity
B. Decreased wear resistance
C. Decreased thermal conductivity
D. None of the above