AACD

Review 144 AACD practice questions with answer explanations and community insights.

Question 1

Why do self etch bonding systems tend to have less post operative sensitivity?

  1. Self etch bonding does not remove the smear layer but modifies it, leaving the smear plugs intact
  2. Self etch products remove & replace the smear layer
  3. Self etch bonding removes collagen fibrils and replaces them with resin plugs
  4. Self etch systems etch and bond simultaneously

Question 2

A patient would like to brighten her smile in addition to restoring her missing tooth #8. however, she is not interested in dental implants. She would also like to close the spaces between her existing teeth. Unfortunately, due to financial concerns she can only restore teeth ##7-10. Reviewing the photograph above, how would you achieve golden proportion?

  1. Fabricating a three-unit bridge and a single veneer on tooth #10 will easily achieve golden proportion
  2. In office bleaching along with direct bonding on teeth ##7, 9, and 10, and a Maryland bridge to replace tooth #8 will easily achieve golden proportion
  3. Direct resin bonding in conjunction with a removable partial denture will achieve golden proportion
  4. It is impossible to achieve golden proportion unless more teeth are restored

Question 3

Which of the following anatomical characteristics regarding the lips is correct?

  1. Lip morphology has little to do with bones and teeth
  2. Lips plump and drop with aging
  3. The philtrum of the lip is an accurate anatomical guide to the center of the face
  4. As one ages, the philtrum of the lip becomes more dominant

Question 4

With acetone based adhesive systems, the strength of adhesion to dentin after etching with phosphoric acid can be increased by:

  1. Removing the smear layer to eliminate all surface debris.
  2. Drying the dentin completely.
  3. Treating the dentin with 10% NaOCI (sodium hypochlorite) and keeping it moist.
  4. Keeping the dentin moist.

Question 5

Which of the following would be the main advantage of utilizing a layering technique with composite resin in restoring a disto-occlusal Class II restoration?

  1. Higher degree of polymerization and lower degree of tooth sensitivity
  2. Higher sheer strength and wear resistance
  3. Higher tensile strength and modulus of elasticity
  4. Better compressive strength
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