Chairside - Glidewell Dental Labs
Chairside - Glidewell Dental Labs
Chairside - Glidewell Dental Labs
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dealers. It’s a universal prep technique<br />
that works for all materials, although<br />
as the next letter in this section points<br />
out, the strength of BruxZir ® Solid<br />
Zirconia is starting to change how<br />
much we have to reduce, especially at<br />
the margin.<br />
– Mike<br />
Dear Dr. DiTolla,<br />
First, thank you very much for your<br />
educational support and updated dental<br />
market information. The latest issue of<br />
<strong>Chairside</strong> (Vol. 7, Issue 1) includes your<br />
very interesting and helpful article “BruxZir ®<br />
Solid Zirconia Anterior Esthetic Challenge.”<br />
I would appreciate it if you could give me<br />
information about labial and palatal crown<br />
thickness (Figs. 31–34). I wonder why you<br />
used a shoulder preparation technique<br />
when the BruxZir website says that feather<br />
edge is acceptable?<br />
Cordially,<br />
– Alex Zavyalov, DDS<br />
New York, N.Y.<br />
Dear Alex,<br />
Good question! I guess the best<br />
answer is that having spent the last<br />
20 years prepping all-ceramic crown<br />
preps at a certain thickness, old habits<br />
die hard. My Reverse Preparation<br />
Technique uses a round bur to ensure<br />
that I get 1 mm of reduction in the<br />
gingival third to help the esthetics and<br />
the emergence profile. As you pointed<br />
out, BruxZir ® Solid Zirconia is the<br />
one monolithic material (besides cast<br />
gold) that can handle a feather-edge<br />
margin, and we are just getting started<br />
with a Minimal Prep Crown Project to<br />
see just how little we can reduce an<br />
anterior tooth and still have a decentlooking<br />
BruxZir crown. Imagine if we<br />
could prep a tooth and stay within the<br />
enamel, yet be able to cement a highstrength<br />
all-ceramic crown, rather<br />
than bonding a veneer. So, yes, even<br />
though I did not prep conservative<br />
margins on those teeth, you certainly<br />
can prep those types of margins with<br />
BruxZir crowns. Even if you were<br />
worried about esthetics on the facial,<br />
you could still prep a conservative<br />
margin on the lingual.<br />
– Mike<br />
Dear Dr. DiTolla,<br />
Regarding Dr. Ellis Neiburger’s article<br />
in the last issue of <strong>Chairside</strong>, “Is It Time<br />
to Do Routine Adult Pulpotomies?”<br />
(Vol. 7, Issue 1), there should have been<br />
more discussion about using lasers to sterilize<br />
the pulp instead of formocresol, and<br />
other options instead of IRM, like MTA.<br />
– Brian Danielsson, DDS<br />
Ridgecrest, Calif.<br />
Response from Dr. Neiburger:<br />
Dear Brian,<br />
The article focused on time-tested<br />
pulpotomy techniques that, in light of<br />
the world’s poor economic situation,<br />
can be done easily, quickly and<br />
inexpensively. Laser sterilization of<br />
the pulp chamber is relatively new,<br />
has only a small amount of research<br />
to establish efficacy and requires laser<br />
equipment more costly than a $10<br />
bottle of formocresol. It holds promise<br />
and should be further investigated.<br />
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Letters to the Editor 5