Quiz 3 Flashcards
If a zirconia crown is chosen to restore this broken tooth, which of the following statements are false?
a) zirconia has a low translucency, and therefore highly esthetic
b) zirconia is the strongest tooth colored material in terms of MPa
c) zirconia cannot be etched prior to cementation to increase its retention
d) zirconia can be cemented with any type of crown cement
A
T/F: Zirconia is a strong material because of transformation toughening. This process, unique to zirconia, involves transformation from a monoclinic particles to tetragonal particles
False
At a social gathering, a friend of a friend finds out you are in dental school. She pulls back her cheek to show you a missing tooth that was pulled a couple of years ago. She wants to know from you what you think she should do about it. Upon further inquiry, you find out she was advised she is not a candidate for an implant due to lack of bone. She wants a bridge, but isn’t sure what material would be best. She wants it to look as if she isn’t missing a tooth. Which of the following statements would be false advice?
a) using lithium discilicate on molar FPD would accomplish her esthetic concerns
b) using lithium discilicate on molar FPD is contraindicated due to strength
c) any type of zirconia would be an excellent choice for molar FPD
d) porcelain fused to metal FPD would provide both strength and esthetics for this patient
C
Which of the following restorations wold allow you to use Resin-Modified glass ionomer cement? (Assuming the tooth preparation has no need of additional retention from the cement.) Choose the best answer.
a) Feldspathic porcelain veneer
b) Any gold crown
c) Any e.Max crown
d) Any gold & zirconia crown
e) Any e.Max and zirconia crown
D
This person has a high focus on esthetics. To restore this broken front tooth and make it look as similar to the other central as possible, which materials would best meet this patients focus?
a) porcelain fused to metal
b) zirconia
c) gold
d) feldspathic porcelain
D
