Procera®, Cercon®, Wol-Ceram® and Lava™ are:
a.
all examples of all-ceramic systems
b.
cementable like PFMs
c.
both a and b
d.
none of the above
Referring to Case #1 (crowns and veneers case) in questions 2 through 5, the case involved:
a.
the combination of no-prep veneers for the lateral incisors and crowns for the central incisors
b.
a zirconia crown with a metal lingual
c.
both a and b
d.
none of the above
When using the double-cord technique:
a.
epinephrine is never used, even if tolerated
b.
a double-zero (Size 00) cord r%tracts the tissue about one-half millimeter
c.
the first cord stays hidden during the preparation and impression phases
d.
both b and c
For this case:
a.
the use of anatomical Comprecaps to compress and dry the retraction cords was shown
b.
the papilla was slightly reduced with a laser because the midline was off
c.
both a and b
d.
none of the above
For the seating of the crowns and veneers:
a.
the fit was checked using a clear try-in cement to hold the restorations in place
b.
as the veneers required bonding, the crowns also were bonded instead of cemented into place
c.
it was noted that an open gingival embrasure was not important because the gingiva always grows back
d.
none of the above
Referring to Case #2 (first Lava™ bridge case) in questions 6 through 9:
a.
a bridge was required because an implant was contraindicated
b.
although the missing tooth was a bicuspid, a Lava™ bridge can be used to replace a missing molar
c.
the reverse preparation was never considered because a pontic was involved
d.
none of the above
The amount of required tooth reduction:
a.
was the same as it would have been for a PFM bridge
b.
was 1.25 mm on the gingival and 1.5 mm on the axial surfaces
c.
was 2 mm on occlusal surfaces
d.
all of the above
When taking the impression, it was suggested that:
a.
a double-arch tray should always be avoided unless the margins are supra-gingival
b.
a double-arch tray should not be used for bridges comprising four or more units
c.
a full arch tray is an “absolute must” for a bridge case—even a three-unit bridge
d.
none of the above
Which of the following IS FALSE garding the discussion of the Lava™ bridge for this case:
a.
some patients prefer the absence of metal because they feel they may have a metal allergy
b.
a patient may have concerns about a gray line from the metal
c.
never have the patient bite down on a cotton roll to help seat a Lava™ bridge into place or it may break
d.
the bridge was luted into place with a regular crown and bridge cement, just like a PFM
Referring to Case #3 (Lava™ crowns for #s 9 and 10), compared to tooth 8:
a.
the zirconia understructure was too opaque for use on just one central
b.
the shape, shade and contours of the centrals matched very nicely
c.
a colored try-in paste was required to verify the final shade
d.
none of the above
Referring to Case #4 (Lava™ crowns for #s 18, 19, 20, 21):
a.
the patient was told that all-ceramic crowns might not have the strength of PFMs
b.
the patient preferred all-ceramic crowns over PFMs with 22-karat understructures
c.
the replaced 20-year-old PFMs had some staining around open margins, visible metal, chips
d.
all of the above
Referring to Case #5 (Lava™ crown on #8) in questions 12 and 13:
a.
the old “window crown” exhibited leakage and some stain, tartar and decay
b.
a supra-gingival margin was used for the Lava™ crown
c.
both a and b
d.
none of the above
During the reverse preparation steps:
a.
a bur was chosen that provided a 1.5 mm depth cut on the facial surface
b.
a wide bur was used for blending the 3 planes: the gingival, middle, and incisal thirds
c.
both a and b
d.
care was taken not to break the natural contacts
Referring in questions 14 through 18 to information provided by the manufacturer:
a.
based on past technology, many dentists are concerned about the longevity of all-ceramic restorations
b.
zirconium oxide, glass-free, polycrystalline ceramic is different from—stronger than—past ceramics
c.
there is no esthetic need to prep subgingivally for Lava™ restorations
d.
all of the above
When preparing teeth:
a.
feather edges and shoulder margins are not recommended
b.
a chamfer or rounded shoulder preparation is optimal
c.
avoid undercuts
d.
all of the above
When using a CAD process to design restorations:
a.
a computer minimizes human error and provides proper design and consistency
b.
bridges are designed with the right connector strength
c.
both a and b
d.
none of the above
Regarding the fabrication process, it is NOT
a.
a crown is milled by a machine to final form and then cut back by a technician for the overlay ceramic
b.
a Lava™ framework—the first esthetic layer of ceramic—is available in eight shades
c.
use of a fine diamond is recommended if a minor adjustment to the Lava™ substructure is required
d.
a Lava™ restoration’s internal surface is adequately roughened: no additional treatment is required
Which statement(s) is/ are true:
a.
due to the strength of a zirconia framework, bonding with adhesive cement is not required
b.
conventional cementation of Lava™ restorations has proven reliable
c.
both a and b
d.
none of the above are true
A soft tissue model is use to ensure:
a.
there will be intimate contact between the tissue and restoration
b.
that there will be no black triangles (open gingival embrasures) when the case is seated
c.
that the fit at the gingival margin can be checked prior to seating
d.
all of the above
Anatomical Comprecaps (Coltene/Whaledent) are used prior to impressions to:
a.
keep the top retraction cord dry
b.
keep pressure on the gingival to prevent bleeding
c.
keep the patients tongue from dislodging the top cord
d.
all of the above
