Dental Materials Exam Sample
Dental MaterialsThe dental amalgam alloys and mercury are mixed in a ratio of:
a. 1:2
b. 1:1
c. 1.3
d. 2:1
Most common drawback of amalgam restoration is:
a. Secondary expansion.
b. Porosity.
c. Marginal break-downd.
d. contraction on setting.
Which part of the amalgam restoration has the highest mercury concentration?:
a. Marginal area.
b. Center of restoration.
c. Proximal surface of restoration.
d. Inclined planes.
Fillers are added to composite resin to:
a. Increase working time.
b. Increase co-efficient of thermal expansion.
c. Inhibit matrix deformation.
d. B + C
The main resin constituent of polishable composite resin is:
a: Polymethylmethacrylate.
b. Polycarbonate.
c. Dimethacrylate.
d. Urethane.