An e.max CAD block:
a.
is made of lithium disilicate
b.
primarily is used to mill copings
c.
achieves its full flexural strength of 130 megapascals after full crystallization in the oven
d.
both a an b
Which of the following is NOT true about e-max CAD:
a.
it can be stained
b.
it can be conventionally cemented
c.
it cannot be overlayed with a veneering ceramic
d.
it can be milled to full contour
In the context of discussing the shade of a material that is homogeneous, it was observed that:
a.
we do not have the problems of a dark or a snow-white substructure
b.
the shade on the outside of the restoration is the same as the shade on the inside
c.
both a and b
d.
none of the above
A “blue block” is so-called because of the:
a.
distinctive veining, like a small block of blue cheese
b.
blue color of the ceramic block out of which crowns are milled
c.
protective blue coating that prevents blocks from chipping in shipment
d.
none of the above
It was observed that the STA single-tooth anesthesia system cannot be used for quadrant dentistry.
a.
True
b.
False
A carbide razor bur and Christiansen crown remover were shown to be effective for old PFMs.
a.
True
b.
False
Which of the above is/are true:
a.
if you get a good impression of a bad margin, the lab can still make it work
b.
even when preparations are perfect, bad impressions makes them less readable for the lab technician
c.
for an ideal impression, you need good retraction to can get impression material beyond the margin
d.
all of the above
It was observed that restored teeth typically get bigger,” never smaller:
a.
because dentists have tendency to under-prepare teeth
b.
because technicians have tendency to overbuild restorations for improved esthetics
c.
and for that reason no-prep veneers adjacent to restorative dentistry are a conservative esthetic option
d.
all of the above
Which was NOT discussed for the first case involving the placement of four anterior e.max crowns:
a.
use of veneers to correct for undesirable color on adjacent teeth
b.
newer porcelain technology that allow us to make veneers as thin as one-third of a millimeter
c.
correcting for interproximal gaps in posterior teeth with no-prep veneers
d.
no drilling, numbing or temporaries required when placing four no-prep veneers on back teeth
An example of the ultimate challenge for a dental material is:
a.
the hammer test
b.
its ability to insulate the tooth from hot and cold
c.
doing a crown on a single central incisor that matches the adjacent natural tooth
d.
all of the above
When demonstrating the Vita Easyshade®, which of the following areas of the tooth were measured:
a.
the gingival third
b.
the middle third
c.
the incisal third
d.
all of the above
When taking a photograph of a tooth that a restored tooth should match:
a.
the lab needs to see the tooth in relation to a picture of the shade tab, with the tab in place
b.
a red filter should be used
c.
an old fashioned print is most desirable
d.
all of the above
Using e.max for an endodontically treated tooth, it was noted that we would not see show-through.
a.
True
b.
False
When demonstrating the two-cord technique it was noted that:
a.
a top (size 2E) cord is not required if supragingival margins are desired
b.
the double-zero cord stays in place throughout the entire impression sequence
c.
impression material beyond the margin is an impression of the root surface in the sulcus
d.
all of the above
For the case involving the place of a 3-unit e.max anterior bridge (8-10):
a.
the root of a broken tooth was removed prior to seating a lab-fabricated temporary bridge
b.
a light-cured composite was added to the tissue-site of an ovate pontic on a temporary bridge
c.
both a and b
d.
none of the above
As the two-cord technique was demonstrated:
a.
the bottom cord is smaller than the top cord
b.
the top cord is smaller than the bottom cord
c.
posterior teeth require larger diameter cords
d.
none of the above
Using a round bur to trace around the gingiva:
a.
is the main step of the reverse preparation technique
b.
assures enough reduction in the gingival third
c.
gives us a nice half-circle shape into the tooth, beginning the formation of our margin
d.
all of the above
Compared to other options, it was noted for e.max that:
a.
there is no dark coping to mask-out
b.
there is no white substructure to shine through
c.
both a and b
d.
none of the above are true
A Cerec 3 intraoral scanner:
a.
was used for one case in lieu of taking an impression
b.
does not require retraction because a special powder enables it to “see” under the gingiva
c.
both a and b
d.
none of the above
For e.max CAD crowns, which of the following is/are true:
a.
with milling and CAD/CAM milling technology, we can make crowns that are more consistent
b.
it is esthetic, has no substructure, and can be conventionally cemented
c.
both a and b
d.
none of the above
