Endo Tribune U.S. No. 10, 2011
Array
(
[post_data] => WP_Post Object
(
[ID] => 56471
[post_author] => 0
[post_date] => 2011-11-23 10:43:19
[post_date_gmt] => 2011-11-23 10:43:19
[post_content] =>
[post_title] => Endo Tribune U.S. No. 10, 2011
[post_excerpt] =>
[post_status] => publish
[comment_status] => closed
[ping_status] => closed
[post_password] =>
[post_name] => endo-tribune-u-s-no-10-2011-1011
[to_ping] =>
[pinged] =>
[post_modified] => 2024-10-21 20:41:37
[post_modified_gmt] => 2024-10-21 20:41:37
[post_content_filtered] =>
[post_parent] => 0
[guid] => https://e.dental-tribune.com/epaper/etus1011/
[menu_order] => 0
[post_type] => epaper
[post_mime_type] =>
[comment_count] => 0
[filter] => raw
)
[id] => 56471
[id_hash] => 7e660bbc6ace1c5b6a212899e7d8f06a8e638287014c86ffe1d1b1c8fec47ff0
[post_type] => epaper
[post_date] => 2011-11-23 10:43:19
[fields] => Array
(
[pdf] => Array
(
[ID] => 56472
[id] => 56472
[title] => ETUS1011.pdf
[filename] => ETUS1011.pdf
[filesize] => 0
[url] => https://e.dental-tribune.com/wp-content/uploads/ETUS1011.pdf
[link] => https://e.dental-tribune.com/epaper/endo-tribune-u-s-no-10-2011-1011/etus1011-pdf-2/
[alt] =>
[author] => 0
[description] =>
[caption] =>
[name] => etus1011-pdf-2
[status] => inherit
[uploaded_to] => 56471
[date] => 2024-10-21 20:41:31
[modified] => 2024-10-21 20:41:31
[menu_order] => 0
[mime_type] => application/pdf
[type] => application
[subtype] => pdf
[icon] => https://e.dental-tribune.com/wp-includes/images/media/document.png
)
[cf_issue_name] => Endo Tribune U.S. No. 10, 2011
[contents] =>
)
[permalink] => https://e.dental-tribune.com/epaper/endo-tribune-u-s-no-10-2011-1011/
[post_title] => Endo Tribune U.S. No. 10, 2011
[client] =>
[client_slug] =>
[pages_generated] =>
[pages] => Array
(
[1] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/2000/page-0.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/1000/page-0.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/200/page-0.jpg
)
[key] => Array
(
[2000] => 56471-32f33a2a/2000/page-0.jpg
[1000] => 56471-32f33a2a/1000/page-0.jpg
[200] => 56471-32f33a2a/200/page-0.jpg
)
[ads] => Array
(
)
[html_content] =>
)
[2] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/2000/page-1.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/1000/page-1.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/200/page-1.jpg
)
[key] => Array
(
[2000] => 56471-32f33a2a/2000/page-1.jpg
[1000] => 56471-32f33a2a/1000/page-1.jpg
[200] => 56471-32f33a2a/200/page-1.jpg
)
[ads] => Array
(
)
[html_content] =>
)
[3] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/2000/page-2.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/1000/page-2.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/200/page-2.jpg
)
[key] => Array
(
[2000] => 56471-32f33a2a/2000/page-2.jpg
[1000] => 56471-32f33a2a/1000/page-2.jpg
[200] => 56471-32f33a2a/200/page-2.jpg
)
[ads] => Array
(
)
[html_content] =>
)
[4] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/2000/page-3.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/1000/page-3.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/200/page-3.jpg
)
[key] => Array
(
[2000] => 56471-32f33a2a/2000/page-3.jpg
[1000] => 56471-32f33a2a/1000/page-3.jpg
[200] => 56471-32f33a2a/200/page-3.jpg
)
[ads] => Array
(
)
[html_content] =>
)
[5] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/2000/page-4.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/1000/page-4.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/200/page-4.jpg
)
[key] => Array
(
[2000] => 56471-32f33a2a/2000/page-4.jpg
[1000] => 56471-32f33a2a/1000/page-4.jpg
[200] => 56471-32f33a2a/200/page-4.jpg
)
[ads] => Array
(
)
[html_content] =>
)
[6] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/2000/page-5.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/1000/page-5.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/200/page-5.jpg
)
[key] => Array
(
[2000] => 56471-32f33a2a/2000/page-5.jpg
[1000] => 56471-32f33a2a/1000/page-5.jpg
[200] => 56471-32f33a2a/200/page-5.jpg
)
[ads] => Array
(
)
[html_content] =>
)
[7] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/2000/page-6.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/1000/page-6.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/200/page-6.jpg
)
[key] => Array
(
[2000] => 56471-32f33a2a/2000/page-6.jpg
[1000] => 56471-32f33a2a/1000/page-6.jpg
[200] => 56471-32f33a2a/200/page-6.jpg
)
[ads] => Array
(
)
[html_content] =>
)
[8] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/2000/page-7.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/1000/page-7.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/200/page-7.jpg
)
[key] => Array
(
[2000] => 56471-32f33a2a/2000/page-7.jpg
[1000] => 56471-32f33a2a/1000/page-7.jpg
[200] => 56471-32f33a2a/200/page-7.jpg
)
[ads] => Array
(
)
[html_content] =>
)
[9] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/2000/page-8.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/1000/page-8.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/200/page-8.jpg
)
[key] => Array
(
[2000] => 56471-32f33a2a/2000/page-8.jpg
[1000] => 56471-32f33a2a/1000/page-8.jpg
[200] => 56471-32f33a2a/200/page-8.jpg
)
[ads] => Array
(
)
[html_content] =>
)
[10] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/2000/page-9.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/1000/page-9.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/200/page-9.jpg
)
[key] => Array
(
[2000] => 56471-32f33a2a/2000/page-9.jpg
[1000] => 56471-32f33a2a/1000/page-9.jpg
[200] => 56471-32f33a2a/200/page-9.jpg
)
[ads] => Array
(
)
[html_content] =>
)
)
[pdf_filetime] => 1729543291
[s3_key] => 56471-32f33a2a
[pdf] => ETUS1011.pdf
[pdf_location_url] => https://e.dental-tribune.com/tmp/dental-tribune-com/56471/ETUS1011.pdf
[pdf_location_local] => /var/www/vhosts/e.dental-tribune.com/httpdocs/tmp/dental-tribune-com/56471/ETUS1011.pdf
[should_regen_pages] => 1
[pdf_url] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/56471-32f33a2a/epaper.pdf
[pages_text] => Array
(
[1] =>
ENDO TRIBUNE
The World’s Endodontic Newspaper · U.S. Edition
November 2011
www.endo-tribune.com
Endo Opinion
A logical basis
to judge
endodontic
innovations
By Barry Lee Musikant, DMD
The introduction of new technology has as its goal to improve
a process that was unable to be
achieved, poorly achieved by other
means or achieving the same or
superior results in a more time and
cost-efficient manner. Using these
criteria as the justification for the
introduction of rotary NiTi, the burden of proof is on demonstrating
that at least some of these conditions
previously existed.
Certainly prior to the introduction
of rotary NiTi, dentists were shaping canals in many cases quite well.
One simply has to observe the work
of Dr. Herb Schilder to recognize
excellence before the implementation of rotary NiTi.1
Yet, most dentists would admit
that achieving that level of perfection is quite challenging using the
tools Schilder had to work with. So,
while it was possible to attain perfection with what previously existed, the incorporation of rotary NiTi
made it possible for more dentists
to achieve results approaching the
excellence of Schilder.
The justification for the implementation of rotary NiTi is that it
produces superior results more simply and in less time than conventional endodontics. Yet to make this
an accurate comparison, we have
to settle on just what conventional
endodontics means.
For most dentists, conventional
endodontics means the shaping of
canals with a series of K-files used
in a stepback manner. Yet, this was
not the technique Schilder used to
shape canals.2
Rather, he used reamers, instruments whose design includes fewer
and more vertically oriented flutes
than K-files, instruments that are
used conventionally, but not nearly
as well known as K-files.
If one considers the use of K-files
as the only option if one doesn’t
adopt rotary NiTi, one also has to
admit that the adaptation of rotary
NiTi does not eliminate the use of
K-files since they are a requirement for glide path creation, a
ET
page 2C
Vol. 6, No. 10
Rosenberg stepping down from
endo chairmanship at NYU
Dr. Paul A. Rosenberg, professor and chairman of the Dr. I.N.
and Sally Quartararo Department
of Endodontics at New York University since 1990, has announced that
he will be stepping down from the
chairmanship once a successor is
chosen. Rosenberg will continue to
be engaged in teaching and scholarly activities as a full-time faculty
member in the Department of Endodontics.
As chairman, Rosenberg has
shown true leadership and has compiled a list of significant achievements. His chairmanship has been
marked by national and international recognition of NYU’s postgraduate program in endodontics as
one of the leading programs in that
specialty.
The program was one of the first in
the nation to introduce implants into
an endodontic advanced education
curriculum and to include endodontic residents in outreach programs
to underserved areas. His residents
have provided care in Nicaragua, the
Dominican Republic, Grenada, Alaska and Maine. He also introduced
NYUCD’s first mentoring program
for predoctoral students. A highlight
of his chairmanship was the naming
of the department in honor of Dr. I.N.
and Sally Quartararo.
Rosenberg has had other notable
achievements, including serving as
the NYU College of Dentistry’s first
associate dean for graduate programs, as a director of the American Board of Endodontics, and as a
Dr. Paul A. Rosenberg has a long record of achievement at NYU. (Photo/
Fred Michmershuizen, Dental Tribune)
scientific reviewer for the Journal
of Endodontics. He has been recognized with the prestigious NYU
Distinguished Teaching Award, the
highest award presented for teaching by New York University. He has
served as both a senator from the
NYU College of Dentistry to the University Senate and as a member of
the University Council.
In 2008, the NYU College of Dentistry recognized him with the naming of the Paul and Maxine Rosenberg Education Wing at the College
of Dentistry. Rosenberg is a prolific
author and lectures frequently at
both the national and international
levels. His publications and lectures
are focused on the biologic causes
and prevention of endodontic pain.
Founded in 1865, New York University College of Dentistry (NYUCD)
is the third oldest and the largest
dental school in the United States,
educating more than 8 percent of all
dentists. NYUCD has a significant
global reach and provides a level of
national and international diversity
among its students that is unmatched
by any other dental school. ET
(Source: NYUCD)
Endodontic scholarship to provide
educator with leadership training
The American Dental Education Association (ADEA), in partnership with the American Association of Endodontists Foundation,
will sponsor an endodontic educator’s participation in ADEA’s
premier leadership development
program.
The ADEA/AAE Foundation
Scholar in the ADEA Leadership
Institute will receive a $25,000
scholarship to participate in the
ADEA Leadership Institute, a yearlong program that develops faculty members from all elements
of dental education as the future
leaders of dental and higher education. In particular, this sponsorship
helps support the costs associated
with the fellow’s participation in the
institute.
The award will be presented in
a ceremony during the 2012 ADEA
Annual Session & Exhibition in
Orlando, Fla., March 17-21, 2012.
The mission of ADEA is to lead
individuals and institutions of the
dental education community to
address contemporary issues influencing education, research and the
delivery of oral health care for the
health of the public. ADEA’s activities encompass a wide range of
research, advocacy, faculty development, meetings and communications.
ADEA members interested in
learning more about the ADEA/AAE
Foundation Scholar in the ADEA
Leadership Institute and applying
should
visit
www.adea.org/
professional_development/adea_
scholarships_awards_fellowships. ET
(Source: ADEA)
[2] =>
2C
Endo Opinion
Fig. 1
f ET page 1C
necessity before rotary NiTi can
be safely used. Therefore, at best,
rotary NiTi implies the reduction in
the use of K-files without replacing
them completely. All the problems
associated with K-files in their creating the initial canal shaping are
still present. It is only the latter
part of canal shaping for which the
rotary NiTi are responsible.
With the notable improvements
that rotary NiTi bring to canal shaping, is it not reasonable to assume
that these same improvements
would exist whether or not K-files or
K-reamers unrelieved and relieved
were used?
To make this judgment, one
would have to appreciate the beneficial effects of a reamer design in
comparison to a K-file.
Certainly, Schilder did have that
appreciation. He noted in his papers
that reamers engaged less along
length reducing the resistance to
apical negotiation. He noted the
superior tactile perception, their
greater flexibility and the increased
ability to shave dentin from the
canal walls.
Yet are these improvements
sufficient to eliminate the need
for rotary NiTi? It has been stated
many times that 02 tapered stainless steel instruments tend to distort transport canal walls to the
outside curve as progressively larger tipped sized instruments become
stiffer and stiffer. Equating K-files
with K-reamers one would conclude that this is a distinct possibility with either design and the
more flexible rotary NiTi instruments would shape these canals
to greater dimensions with less
chance of distortion.
This progression of thought
is undermined by the fact that
K-reamers are significantly less
stiff than comparably sized K-files,
that by incorporating a flat along
the K-reamers working length,
the cross sectional area is reduced
making the instruments even more
flexible, that the reduced engagement along length allows the
instruments to adapt to the canal
walls more readily taking advantage of stainless steel’s property of
recording curves rather than snapping back to the straight position,
a unique NiTi property and detrimental to our goal of distortionfree shaping.
As we can see, the concept of con-
Tell us
what
you
think!
Endo Tribune | November 2011
Fig. 2
ENDO TRIBUNE
The World’s Endodontic Newspaper · U.S. Edition
Publisher & Chairman
Torsten R. Oemus
t.oemus@dental-tribune.com
Chief Operations Officer
Eric Seid
e.seid@dental-tribune.com
Group Editor & Designer
Robin Goodman
r.goodman@dental-tribune.com
Editor in Chief Endo Tribune
Frederic Barnett, DMD
BarnettF@einstein.edu
International Editor Endo Tribune
Prof. Dr. Arnaldo Castellucci
Managing Editor/Designer,
Endo Tribune & Online Editor
Fred Michmershuizen
f.michmershuizen@dental-tribune.com
Managing Editor/Designer
Implant, Ortho & Lab Tribunes
Sierra Rendon
s.rendon@dental-tribune.com
Managing Editor/Designer
Dental Tribune U.S. & Canada
Robert Selleck
r.selleck@dental-tribune.com
Fig. 1: Photo of a K-File. Note the
high number of horizontally oriented flutes. Fig. 2: Photo of a relieved
reamer. Note the patented flat side
and the decreases number of vertically oriented flutes.
Fig. 3: Photo of a relieved reamer
which negotiated easily to the
apex in a highly curved canal.
(Photos/Provided by Dr. Barry
Lee Musikant)
Managing Editor/Designer
Show Dailies
Kristine Colker
k.colker@dental-tribune.com
Account Manager
Humberto Estrada
h.estrada@dental-tribune.com
Marketing Manager
Anna Wlodarczyk-Kataoka
a.wlodarczyk@dental-tribune.com
Marketing & Sales Assistant
Lorrie Young
l.young@dental-tribune.com
C.E. Manager
Christiane Ferret
c.ferret@dtstudyclub.com
Dental Tribune America, LLC
116 W. 23rd St., Suite #500
New York, NY 10011
Tel.: (212) 244-7181
Fax: (212) 244-7185
Published by Dental Tribune America
© 2011 Dental Tribune America.
All rights reserved.
Dental Tribune America makes every effort
to report clinical information and manufacturer’s product news accurately, but cannot
assume responsibility for the validity of product claims, or for typographical errors. The
publishers also do not assume responsibility
for product names or claims, or statements
made by advertisers. Opinions expressed by
authors are their own and may not reflect
those of Dental Tribune America.
Editorial Advisory Board
Fig. 4: Illustration of a relieved reamer in a reciprocating handpice.
Do you have general comments or criticism
you would like to share? Is there a particular topic you would like to see more articles
about? Let us know by e-mailing us at
feedback@dental-tribune.com. If you would
like to make any change to your subscription
(name, address or to opt out) please send us an
e-mail at database@dental-tribune.com and
be sure to include which publication you are
referring to. Also, please note that subscription
changes can take up to six weeks to process.
ET
Corrections
Endo Tribune strives
to maintain the utmost
accuracy. If you find
a factual error or content that requires clarification,
please
contact Managing Editor
Fred
Michmershuizen
at
f.michmershuizen@
dental-tribune.com.
Frederic Barnett, DMD (Editor in Chief)
Roman Borczyk, DDS
L. Stephen Buchanan, DDS, FICD, FACD
Gary B. Carr, DDS
Prof. Dr. Arnaldo Castellucci
Joseph S. Dovgan, DDS, MS, PC
Unni Endal, DDS
Fernando Goldberg, DDS, PhD
Vladimir Gorokhovsky, PhD
Fabio G.M. Gorni, DDS
James L. Gutmann, DDS, PhD (honoris causa),
Cert Endo, FACD, FICD, FADI
William “Ben” Johnson, DDS
Kenneth Koch, DMD
Sergio Kuttler, DDS
John T. McSpadden, DDS
Richard E. Mounce, DDS, PC
John Nusstein, DDS, MS
Ove A. Peters, PD Dr. med dent., MS, FICD
David B. Rosenberg, DDS
Dr. Clifford J. Ruddle, DDS, FACD, FICD
William P. Saunders, Phd, BDS, FDS, RCS Edin
Kenneth S. Serota, DDS, MMSc
Asgeir Sigurdsson, DDS
Yoshitsugu Terauchi, DDS
John D. West, DDS, MSD
[3] =>
ENDO Tribune | November 2011
ventional shaping versus the new
world of rotary NiTi is a bit more
complex than one might originally
think. We can state categorically
that K-reamers that are relieved
are significantly more flexible than
comparably sized K-files, that they
engage far less along length and
provide for a superior tactile perception giving the dentist the ability to know when the reamer is
either hitting a solid wall, in a tight,
but patent canal or in a canal that is
so curved that it requires prebending to negotiate around without
distortion. Providing this superior
tactile perception sets the relieved
reamers apart from K-files.
While acceding to the superior usage of relieved reamers over
K-files, wouldn’t the incorporation
of rotary NiTi after glide path creation make the procedure even
more efficient and effective? As its
name implies, NiTi instruments are
used most effectively in rotation.
Yet, using NiTi in rotation increases the chances of instrument separation, a product of either torsional
stress or cyclic fatigue or some
combination of both.3 In contrast,
the relieved reamers are used with
either a tight watch winding stroke
or in a 30-degree reciprocating
handpiece, virtually eliminating
the two factors that make rotary
NiTi vulnerable to breakage.4
The K-reamers, routinely shape
canals to a minimum of 35, one mm
back to a 40 with a 25/06 overlaid
taper. After the canal is shaped to
a 20, a tapered peeso is used to
straighten any coronal curve that
may exist generally to within 6 mm
of the apex. The relieved reamers 25 thru 40 are mostly limited
to shaping the apical 6 mm of the
canal. Even highly curved canals
are not susceptible to distortion
via these thicker relieved reamers
because they are still far more flexible than comparably sized K-files,
their motion is confined to a short
arc that keeps them centered within the canal and the tactile perception clearly tells the dentist if the
tip of the instrument is hitting a
wall or negotiating a highly curved
canal from the straight position.
With resistance mainly defined
by what lies ahead of the tip of the
instrument, be it from a solid wall or
an abruptly curved canal, the dentist
knows when to remove the instrument, bend it at the tip and manually
negotiate around the curve prior to
reattaching it to the reciprocating
handpiece followed by rapid negotiation to the apex.
All the rotary NiTi systems make
sense if the premise for their use
is based on the K-file, an instrument Schilder clearly understood
to be a poor design for the function asked of it. None of the rotary
NiTi systems make sense, if the
better designed reamers — both
unrelieved and relieved — are utilized with a short arc of motion
either generated manually or in
the reciprocating handpiece. Rotary NiTi addresses the challenge of
shaping curved canals without distortion better than K-files. They are
Fig. 5a
Endo Opinion 3C
Fig. 5b
Figs. 5a, 5b: Radiographs showing endodontic case performed with relieved reamers in a reciprocating handpiece.
far more flexible than K-files and
somewhat more than K-reamers,
but lose their luster for non-distortion because of their rebound effect
in curved canals. Always seeking
out the straight position, as their
tip size and taper increase there is
a greater and greater tendency to
shape to the outside wall of curved
canals. Most dentists know this and
ET
page 4C
AD
[4] =>
4C
Endo Opinion
f ET page 3C
with the added concern for breakage are generally satisfied in shaping curved canals to a maximum of
25/06 and often a 20/04, a degree of
shaping that will minimize breakage and distortion, but also often
prove inadequate from the point of
view of full debridement and effective irrigation.
An instrument need not be as
flexible as NiTi if is capable of
combining the flexibility it does
have with the ability to record
curves rather than snap back to the
straight position. Once the relieved
reamer records the curve, it is in
effect a passive instrument with
the blades shaving the dentin along
the length of the canal walls on the
downstroke and removing dentin
on the upstroke wherever the dentist directs the length of the instrument to contact the canal walls.
In this way a uniform layer of
dentin is removed circumferentially
retaining the original canal shape
and not undermining the thinner
walls of oval canals the way it
would occur if rotary NiTi was used
instead5.
That is not to say that relieved
reamers could not distort a canal
wall. All one would have to do is
hit a wall, know you hit the wall
and continue to peck aggressive-
‘An instrument
need not be as
flexible as NiTi
if it is capable of
combining the
flexibility it does
have with the
ability to record
curves rather than
snap back to the
straight position.’
Endo Tribune | November 2011
Fig. 6
ly despite all the apical resistance
encountered. Distortion would
inevitably follow.
However, the relieved reamers
offer such superior tactile perception of what the tip of the reamer is
encountering that knowing when to
remove the reamer, bend it at the
tip and manually negotiate around
the impediment is obvious making it unlikely that distortions will
result.
Schilder knew what he was
doing when he chose K-reamers
over K-files. He never needed rotary NiTi to create a standard of
shaping that rotary NiTi does not
Fig. 7
AD
Figs. 6,7: Radiographs showing endodontic cases performed with relieved
reamers in a reciprocating handpiece.
Afghan
Dental Relief
1/4 page vertical
TK
measure up to. You can achieve
that standard in a thoroughly safe
manner by using relieved reamers,
instruments that Schilder would
have noticed negotiate through the
canal with even less resistance
than non-relieved reamers and
in using them with either a tight
watch-winding motion or in the
reciprocating handpiece they are
being used with the tight arc of
motion that Schilder would have
approved of (Figs. 5a, 5b). ET
References
1. Schilder H. Filling root canal in
three dimensions. Dent Clin North
Am 1967;11:723–44.
2. Schilder H. Cleaning and shaping
ET About the author
Barry Lee Musikant, DMD, is a
member of the American Dental
Association, American Association of
Endodontists, Academy of General
Dentistry, the Dental Society of New
York, First District Dental Society,
Academy of Oral Medicine, Alpha
Omega Dental Fraternity and the
American Society of Dental Aesthetics. He is also a fellow of the American College of Dentistry (FACD). As
a partner in the largest endodontic
practice in Manhattan, Musikant’s
35-plus years of practice experience
have established him as one of the
top authorities in endodontics.
the root canal. Dent Clin North
Amer 1974;18:269–296.
3. Li UM, Lee BS, Shih CT, Lan WH,
Lin CP. Cyclic fatigue of endodontic nickel titanium rotary instruments: static and dynamic tests. J
Endod. 2002 Jun;28(6):448–51.
4. Wan J, Rasimick BJ, Musikant
BL, Deutsch AS. Cutting efficiency
of 3 different instrument designs
used in reciprocation. Oral Surg
Oral Med Oral Pathol Oral Radiol
Endod. 2010 May;109(5):e82–5.
5. Wu M-K, Roris A, Barkis D, Wesselink PR (200) Prevalence and
extent of long oval canals in the
apical third. Oral Surgery, Oral
Medicine, Oral Pathology, Oral
Radiology and Endodontics 89,
739–42.
[5] =>
ENDO Tribune | Month 2009
Folio 00
[6] =>
6C
Events & Industry
Endo Tribune | November 2011
Endodontists ‘strike it rich’ in Vegas
By Fred Michmershuizen, Managing Editor
As the saying goes, what happens in Vegas stays in Vegas. But
don’t tell that to the many endodontists who descended upon the
Mandalay Bay Convention Center
for the ADA’s 152nd Annual Session
and World Marketplace Exhibition.
What meeting attendees learned —
and the many new products that
they obtained — will definitely not
stay in Vegas.
To help attendees “strike it rich”
in Las Vegas, the American Dental association assembled leaders in
dental practice, research, academia
and industry to present hundreds of
continuing education courses.
The Annual Session, held Oct.
10-13 (Monday through Thursday),
offered attendees the choice of
more than 260 relevant and topical continuing education courses,
including many for those who practice endodontics.
Course titles included: “The New
Art of Endodontics: Everything’s
Changed Except the Anatomy,”
“Gaining Procedural Mastery with
New Tools” and “How to be Safe,
Simple and Super-Efficient,” among
many others.
More than 500 companies
offered attendees the opportunity
to view and compare the latest
dental products and services, many
of which were of interest to endodontists.
The reps from Coltene Endo
were busy telling meeting attendees about HyFlex controlled memory NiTi files. Jordco was on hand
Dr. Fred Weinstein, from Vancouver, British Columbia. (Photos/Fred
Michmershuizen, Dental Tribune)
Erin Rohs, left, and Anne Franch of Coltene Endo offer information to ADA
meeting attendees about HyFlex controlled memory NiTi files and other
products for endodontists.
Meeting attendees shop the exhibit hall floor at the ADA meeting in Las Vegas.
to display its many products for
endodontists, including its Endoring II hand-held endodontic assistant. Dentazon Corp. showcased its
Friendo warm vertical condensation device, and SS White offered
its EndoGuide precision micro
endodontic burs. ET
Ione Booth of Jordco tells meeting
attendees about Endoring II handheld endodontic assistant.
C-Mor Ultra-Bright Front Surface Mirrors
Essential Dental Systems (EDS)
recently announced a new product
to its line of quality dental devices,
C-Mor™ Ultra-Bright Front Surface Mirrors.
These mirrors revolutionize the
visual field of dentistry by incorporating a special, high-tech process
giving the practitioner the highest reflectance, light and definition
available.
With superior reflection, sharpness and contrast, you can literally see more without distortion or
cloudiness.
Imagine television without
high-definition — now that same
groundbreaking technology is
available in dental mirrors, allowing for the most enhanced field
of vision available with any other
mirror on the market.
The C-Mor Mirror, with its 113
percent color reflection factor, will
change the way you practice den-
A new, ultra-bright mouth
mirror from Essential Dental Systems makes performing all aspects of dentistry
easier by allowing dentists
to see more clinically.
(Photos/Provided by
Essential Dental Systems)
tistry by enhancing what you see
in a way unimaginable until now.
The C-Mor mirror is available
in a convenient four-pack of #5
Stainless Steel Mirror Heads. Additionally offered is a Stainless Steel
Mirror Handle.
These products are available
immediately from all dental distributors.
For more information on this new
product, contact Victoria Reina,
sales and marketing manager, at
(201) 487-9090.
[7] =>
[8] =>
[9] =>
Industry 9C
ENDO Tribune | November 2011
ProMark Endodontic Motor
DENTSPLY Tulsa Dental Specialties recently announced the availability of its newest piece of equipment for dental professionals — the
ProMark Endodontic Motor.
The ProMark is built upon a tradition of performance and reliability
and is the company’s most versatile
and complete endodontic motor for
rotary and reciprocation.
The brushless motor delivers the
ample power and consistency of
full A/C “mains” power. It’s also
compatible with a variety of e-type
handpieces.
The ProMark is preloaded with
the complete library of Tulsa Dental
Specialties’ rotary and reciprocation settings and is fully programmable for individual preferences.
It can also be updated with future
endodontic innovations for a longer
return on investment.
Other features include:
• Modern and attractive motor system
• Delivers smooth reciprocation
• Vivid 3-row LCD display
• Integrated rotary and reciprocation file series library
• Auto-sensing global voltage compatibility (110/220 V)
• Well-weighted foot pedal with
360-degree activation
The ProMark Endodontic Motor
(Photo/provided by DENTSPLY
Tulsa Dental Specialties)
file series, or custom file series
• Handpiece calibration
• Auto-Stop/Reverse/Forward in
rotary mode
• Powerful 30,000 RPM brushless motor can be autoclaved
• With recommended 8:1 handpiece (sold separately)
• Speed Settings: 50 to 3,600
RPM in rotary mode
• Torque Settings: 30 to 1000
g-cm
• Upgradable software and file
library
• Preset options allow five single file,
For additional information,
visit DENTSPLY Tulsa online at
www.tulsadentalspecialties.com
or call (800) 662-1202.
AD
Evolution XR6
The Evolution XR6. (Photo/Seiler)
Seiler released a new line of
fully redesigned microscopes late
last year, with unprecedented
success, incorporating the key
components of a successful operating microscope, including flawless fluid movement, all apochromatic lenses and the brightest
light source on the market.
The Evolution XR6 has truly
revolutionized the way the dental
microscope performs and operates. With six steps of magnification, standard metal halide
illumination and an enhanced
movement, it is the ideal choice
for the private practice.
Seiler continues to stay at the
forefront of fine optics and stands
behind its products with a lifetime warranty on the optics and
mechanics.
Experience the Seiler advantage.
To learn more about the Evolution
XR6 available from Seiler, call (800)
489-2282 to schedule a demonstration,
or visit the company online at www.
seilermicro.com.
[10] =>
)
[page_count] => 10
[pdf_ping_data] => Array
(
[page_count] => 10
[format] => PDF
[width] => 765
[height] => 1080
[colorspace] => COLORSPACE_UNDEFINED
)
[linked_companies] => Array
(
[ids] => Array
(
)
)
[cover_url] =>
[cover_three] =>
[cover] => ![Endo Tribune U.S. No. 10, 2011]()
[cached] => true
)
