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WorksheetsDental Materials- Porcelain
Total questions: 11
Worksheet time: 6mins
Name
Class
Date
1.
Which type of porcelain was developed by JW McClean and TH Hughes in 1965?
a)
alumina
b)
feldspathic
2.
When speaking in terms of fusing temperatures, which classification would a crown that is able to fuse at temperatures of 2000-2300 degrees F.
a)
low
b)
medium
c)
high
3.
Which property of material allows light to pass through the surface and into the body of the material?
a)
translucent
b)
transparent
c)
vitality
d)
opaque
4.
The degree to which crowns expand or contract is called the:
a)
Coefficient of thermal expansion
b)
heat conduction
c)
shrinkage
5.
Glass-based ceramic crowns have a lifelike appearance. What is this property called?
a)
opaque
b)
vitality
c)
translucent
d)
body
6.
Ceramic materials are considered to be among the most _____ of the restorative dental materials, and clinical studies have not shown an adverse reaction to these materials.
a)
vital
b)
biocompatible
c)
esthetic
7.
Which of the following is NOT an advantage of the CAD/CAM system?
a)
one appointment needed
b)
no impression needed
c)
no temporary needed
d)
additional training required
8.
The biggest downfall to the CAD/CAM system is the
a)
shorter appointments
b)
initial cost
c)
less appointments needed
9.
Which of the following is NOT a contraindication for using a PFM crown instead of an all ceramic
a)
esthetics
b)
chipping
c)
wear to the opposing teeth
d)
easier to repair
10.
When cementing an all ceramic crown, all of the following are materials needed EXCEPT
a)
etch
b)
prime/bond
c)
resin cement
d)
durelon
11.
Which of the following is NOT a common mistake that an assistant might make when taking a shade?
a)
using natural light
b)
bright clothing not covered
c)
heavy make-up not removed
d)
taking after the prep has been started
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