A. Decrease micro leakage
B. Decrease polymerization shrinkage
C. Decrease coefficient of thermal expansion
D. Decrease porosity in restorative material
Related Mcqs:
- Acid-etching is done for_______________?
A. 30 seconds
B. 60 seconds
C. 90 seconds
D. 120 seconds - Etching depth after 30 sec for orthodontic bracket with orthophosphoric acid is_________________?
A. 10 um – 20 um
B. 3 um – 9 um
C. 50 um – 110 um
D. 200 um – 250 um - When restoring a tooth with resin material, acid etching can do all of the following except______________?
A. Increase the surface area
B. Permit chemical bonding between resin and enamel
C. Create surface irregularities in enamel for better mechanical retention of resin
D. Condition the tooth surface for better wetting - Etching of dentin does not include_____________?
A. Removal of smear layer
B. Exposure of collagen fibers
C. Opening of dentinal tubules
D. Increases surface energy - Setting expansion is advantageous in__________________?
A. Casts
B. Models
C. Investment
D. Dies - Which acid is formed in the citric acid cycle ?
A. Oxaloacetic acid
B. Glutamic acid
C. Nitric acid
D. None of the above - The first macroscopic indication of morphologic development of primary incisors approximately at____________?
A. 11 weeks in utero
B. 14 weeks in utero
C. 16 weeks in utero
D. 6 weeks in utero - The amino acid from which niacin is synthesized is______________?
A. Tyrosine
B. Theronine
C. Tryptophan
D. Histidine - The amino acid required for the synthesis of haem is______________?
A. Glutamine
B. Glutamic acid
C. Glycine
D. Lysine - Residual monomer content of chemically activated resins is______________?
A. 0.2% to 0.5%
B. 2% to 5%
C. 0.3% to 0.5%
D. 2% to 5%
