Midterm review Flashcards
Why is the cavosurface left at close to 90 degrees with ceramic restorations?
-They are the strongest (tensile strength)
If you are looking for the ultimate in esthetics what should you do?
-Full coverage crown
What is the advantage of milling green or pre-sintered blocks?
-Usually done with zirconia and it is easier on the tooling
Once you’ve bonded your ceramic restoration to the tooth is the whole thing stronger?
-Yes
Acrylics and Bis GMA resins have the same polymerization method. T/F
True
Keeping the dentist moist was decided to be a good thing at which generation of bonding?
4th
What is the number 1 reason for early retirement of dentists?
-WRMSD
Is it desirable to bond silica based (glassy) ceramics?
-Yes
Why is it good to have a contrasting color on your build up material?
-To make sure that your margin is on tooth structure and not on build up material
What is the rationale for breaking contact with porcelain veneer preps?
- Facilitates impressions
- Labs ability to read it and reproduce it
- Don’t want a margin at the contact
What is the bond of the adhesive to the tooth?
-Covalent bond
Is there any reason at all to photo cure a dual cure material
Yes it gives enhanced polymerization
What is the chemical that bonds with glassy ceramics?
-Silane
What is the advantage of pre-hydrolyzed?
-Easier but the disadvantage is shelf life
Complete removal of the smear layer came in what generation of bonding?
-4th generation
