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Porcelain Veneers

Presented by Dr. Robert Margeas, DDS

Quiz Results and Correct Answers

1) For porcelain labial veneers:

  1. a labial reduction of .5 mm is always required
  2. no labial reduction is necessary
  3. the amount of labial reduction is dictated by the aesthetic wax-up
  4. the amount of unrestored tooth structure does not matter
  5. pressed porcelain requires the least amount of reduction

2) The preparation of choice is:

  1. no labial reduction
  2. 1/2 mm of labial reduction only
  3. incisal and labial reduction with a long lingual bevel
  4. incisal and labial reduction with lingual chamfer
  5. incisal and labial reduction with incisal butt margin

3) The porcelain labial veneer preparation should:

  1. have a well defined margin
  2. have rounded inciso-labial line angle
  3. enter the interproximal far enough to hide the interproximal cement margin
  4. end gingivally dictated by the colour of the tooth to be restored
  5. all of the above

4) The porcelain veneer:

  1. should be prepared into dentin when possible
  2. can lengthen the tooth structure by 2 Ð 5 mm of unsupported porcelain
  3. always need to be protected by a bruxism appliance
  4. does not reinforce the restored tooth
  5. has a life expectancy of 3-5 years

5) The try-in gels for porcelain veneers:

  1. always match the post cure cement colour
  2. need to be washed out with water
  3. take into account the yellowing effect of bonding adhesives
  4. need to be removed with acetone
  5. are used after silane is placed

6) Silanes are:

  1. flooded over the inside surface of the veneer to make sure it is well absorbed
  2. good for 1-2 years after arriving in the dental office
  3. need to be on the surface for 5 minutes prior to cementing the veneer
  4. are placed in a monolayer
  5. can be placed in several coats to increase retention

7) The luting composite used for porcelain veneers:

  1. should be a dual cure resin cement so that we are sure of 100% cure
  2. should be thinned with a bonding agent to make adaptation easier
  3. is always colour stable
  4. should be cured fully as quickly as possible
  5. is not always colour stable over time

8) Porcelain veneers:

  1. should always be cemented all at once
  2. should be place in pairs starting on one side
  3. should be placed slowly with attention to expressing the cement as much as possible
  4. should be fully cured as fast as possible to make sure they do not move
  5. can be colour corrected easily with the luting composite

9) To remove the excess luting cement:

  1. use a coarse fine pointed diamond
  2. use a 7901 or 7902 multifluted carbide bur
  3. use a 12 B Bard Parker blade
  4. use a diamond polishing paste in a rubber cup
  5. use a scaler

10) The most common error in occlusion for porcelain veneers:

  1. is to forget to check straight protrusive movement
  2. is to forget to check lateral movement
  3. is to forget to check lateral protrusive movement
  4. is to forget to check centric relation
  5. is to forget to check centric occlusion


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