Ortho Tribune U.S. No. 3+4, 2013
AAO brings it to Philly / Postretention relapse of mandibular anterior crowding / Muscling in on the truth / Boston’s Yankee Dental Congress expands on team-development day / AAO meeting / Industry
Table of contents
Array
(
[post_data] => WP_Post Object
(
[ID] => 60097
[post_author] => 0
[post_date] => 2013-06-25 15:07:55
[post_date_gmt] => 2013-06-25 15:07:55
[post_content] =>
[post_title] => Ortho Tribune U.S. No. 3+4, 2013
[post_excerpt] =>
[post_status] => publish
[comment_status] => closed
[ping_status] => closed
[post_password] =>
[post_name] => ortho-tribune-u-s-no-34-2013-0313
[to_ping] =>
[pinged] =>
[post_modified] => 2024-10-22 03:24:44
[post_modified_gmt] => 2024-10-22 03:24:44
[post_content_filtered] =>
[post_parent] => 0
[guid] => https://e.dental-tribune.com/epaper/otus0313/
[menu_order] => 0
[post_type] => epaper
[post_mime_type] =>
[comment_count] => 0
[filter] => raw
)
[id] => 60097
[id_hash] => 1032b8c194300a5b6a56f8f50869bf866e7b6e7832359783e1dd85d1e351b1a3
[post_type] => epaper
[post_date] => 2013-06-25 15:07:55
[fields] => Array
(
[pdf] => Array
(
[ID] => 60098
[id] => 60098
[title] => OTUS0313.pdf
[filename] => OTUS0313.pdf
[filesize] => 0
[url] => https://e.dental-tribune.com/wp-content/uploads/OTUS0313.pdf
[link] => https://e.dental-tribune.com/epaper/ortho-tribune-u-s-no-34-2013-0313/otus0313-pdf-2/
[alt] =>
[author] => 0
[description] =>
[caption] =>
[name] => otus0313-pdf-2
[status] => inherit
[uploaded_to] => 60097
[date] => 2024-10-22 03:24:38
[modified] => 2024-10-22 03:24:38
[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] => Ortho Tribune U.S. No. 3+4, 2013
[contents] => Array
(
[0] => Array
(
[from] => 01
[to] => 01
[title] => AAO brings it to Philly
[description] => AAO brings it to Philly
)
[1] => Array
(
[from] => 02
[to] => 02
[title] => Postretention relapse of mandibular anterior crowding
[description] => Postretention relapse of mandibular anterior crowding
)
[2] => Array
(
[from] => 03
[to] => 04
[title] => Muscling in on the truth
[description] => Muscling in on the truth
)
[3] => Array
(
[from] => 08
[to] => 08
[title] => Boston’s Yankee Dental Congress expands on team-development day
[description] => Boston’s Yankee Dental Congress expands on team-development day
)
[4] => Array
(
[from] => 10
[to] => 10
[title] => AAO meeting
[description] => AAO meeting
)
[5] => Array
(
[from] => 11
[to] => 11
[title] => Industry
[description] => Industry
)
)
)
[permalink] => https://e.dental-tribune.com/epaper/ortho-tribune-u-s-no-34-2013-0313/
[post_title] => Ortho Tribune U.S. No. 3+4, 2013
[client] =>
[client_slug] =>
[pages_generated] =>
[pages] => Array
(
[1] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/2000/page-0.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/1000/page-0.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/200/page-0.jpg
)
[key] => Array
(
[2000] => 60097-01f00de1/2000/page-0.jpg
[1000] => 60097-01f00de1/1000/page-0.jpg
[200] => 60097-01f00de1/200/page-0.jpg
)
[ads] => Array
(
)
[html_content] =>
)
[2] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/2000/page-1.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/1000/page-1.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/200/page-1.jpg
)
[key] => Array
(
[2000] => 60097-01f00de1/2000/page-1.jpg
[1000] => 60097-01f00de1/1000/page-1.jpg
[200] => 60097-01f00de1/200/page-1.jpg
)
[ads] => Array
(
)
[html_content] =>
)
[3] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/2000/page-2.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/1000/page-2.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/200/page-2.jpg
)
[key] => Array
(
[2000] => 60097-01f00de1/2000/page-2.jpg
[1000] => 60097-01f00de1/1000/page-2.jpg
[200] => 60097-01f00de1/200/page-2.jpg
)
[ads] => Array
(
)
[html_content] =>
)
[4] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/2000/page-3.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/1000/page-3.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/200/page-3.jpg
)
[key] => Array
(
[2000] => 60097-01f00de1/2000/page-3.jpg
[1000] => 60097-01f00de1/1000/page-3.jpg
[200] => 60097-01f00de1/200/page-3.jpg
)
[ads] => Array
(
)
[html_content] =>
)
[5] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/2000/page-4.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/1000/page-4.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/200/page-4.jpg
)
[key] => Array
(
[2000] => 60097-01f00de1/2000/page-4.jpg
[1000] => 60097-01f00de1/1000/page-4.jpg
[200] => 60097-01f00de1/200/page-4.jpg
)
[ads] => Array
(
)
[html_content] =>
)
[6] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/2000/page-5.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/1000/page-5.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/200/page-5.jpg
)
[key] => Array
(
[2000] => 60097-01f00de1/2000/page-5.jpg
[1000] => 60097-01f00de1/1000/page-5.jpg
[200] => 60097-01f00de1/200/page-5.jpg
)
[ads] => Array
(
)
[html_content] =>
)
[7] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/2000/page-6.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/1000/page-6.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/200/page-6.jpg
)
[key] => Array
(
[2000] => 60097-01f00de1/2000/page-6.jpg
[1000] => 60097-01f00de1/1000/page-6.jpg
[200] => 60097-01f00de1/200/page-6.jpg
)
[ads] => Array
(
)
[html_content] =>
)
[8] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/2000/page-7.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/1000/page-7.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/200/page-7.jpg
)
[key] => Array
(
[2000] => 60097-01f00de1/2000/page-7.jpg
[1000] => 60097-01f00de1/1000/page-7.jpg
[200] => 60097-01f00de1/200/page-7.jpg
)
[ads] => Array
(
)
[html_content] =>
)
[9] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/2000/page-8.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/1000/page-8.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/200/page-8.jpg
)
[key] => Array
(
[2000] => 60097-01f00de1/2000/page-8.jpg
[1000] => 60097-01f00de1/1000/page-8.jpg
[200] => 60097-01f00de1/200/page-8.jpg
)
[ads] => Array
(
)
[html_content] =>
)
[10] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/2000/page-9.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/1000/page-9.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/200/page-9.jpg
)
[key] => Array
(
[2000] => 60097-01f00de1/2000/page-9.jpg
[1000] => 60097-01f00de1/1000/page-9.jpg
[200] => 60097-01f00de1/200/page-9.jpg
)
[ads] => Array
(
)
[html_content] =>
)
[11] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/2000/page-10.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/1000/page-10.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/200/page-10.jpg
)
[key] => Array
(
[2000] => 60097-01f00de1/2000/page-10.jpg
[1000] => 60097-01f00de1/1000/page-10.jpg
[200] => 60097-01f00de1/200/page-10.jpg
)
[ads] => Array
(
)
[html_content] =>
)
[12] => Array
(
[image_url] => Array
(
[2000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/2000/page-11.jpg
[1000] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/1000/page-11.jpg
[200] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/200/page-11.jpg
)
[key] => Array
(
[2000] => 60097-01f00de1/2000/page-11.jpg
[1000] => 60097-01f00de1/1000/page-11.jpg
[200] => 60097-01f00de1/200/page-11.jpg
)
[ads] => Array
(
)
[html_content] =>
)
)
[pdf_filetime] => 1729567478
[s3_key] => 60097-01f00de1
[pdf] => OTUS0313.pdf
[pdf_location_url] => https://e.dental-tribune.com/tmp/dental-tribune-com/60097/OTUS0313.pdf
[pdf_location_local] => /var/www/vhosts/e.dental-tribune.com/httpdocs/tmp/dental-tribune-com/60097/OTUS0313.pdf
[should_regen_pages] => 1
[pdf_url] => https://epaper-dental-tribune.s3.eu-central-1.amazonaws.com/60097-01f00de1/epaper.pdf
[pages_text] => Array
(
[1] =>
ORTHO TRIBUNE
The World’s Orthodontic Newspaper · U.S. Edition
AAO review 2013 — Vol. 8, Nos. 3/4
www.ortho-tribune.com
AAO brings it
to Philly
Hot educational
topics and a wide
array of ortho
offerings keeps
annual meeting
interesting
Diana P. Friedman, CEO, and Nicholas
Wood, chairman, show off the Vespa that
AAO attendees could win at the Sesame
Communications booth.
By Sierra Rendon, Managing Editor
Photo/Provided by Sesame Communications
T
housands of orthodontists and
orthodontic team members
traveled to Philadelphia in early May to take part in the various educational and social offerings at
the American Association of Orthodontists 113th annual meeting.
The week’s session offered an extensive list of clinical and practice management sessions, feature speaker
sessions, oral research abstract presentations, table clinics and much more to
fulfill attendees’ educational needs.
” See AAO, page 10
Dr. Martin
Van Vliet
of Van Vliet
Orthodontics
takes the
‘i-CAT FLX
Challenge’
at the i-CAT
booth.
Photo/Provided
by Imaging
AAO attendees head out of the Philadelphia Convention Center during a lunch break at the
meeting in May. Photo/Sierra Rendon, Managing Editor
Sciences
AD
Dental Tribune America
116 West 23rd Street
Suite #500
New York, N.Y. 10011
PRSRT STD
U.S. Postage
PAID
San Antonio, TX
Permit #1396
[2] =>
2
From the Editor
Ortho Tribune U.S. Edition | AAO review 2013
Postretention
relapse of mandibular
anterior crowding
By Dennis J. Tartakow,
DMD, MEd, EdD, PhD, Editor in Chief
Relapse of mandibular anterior crowding occurs in many well-treated cases,
whether they had bicuspid extraction,
non-extraction treatment, third molar removal, non-removal or agenesis.
Why?
Is it related to (a) form and function, (b)
tooth-mass issues, (c) occlusion, (d) temporomandibular relationship, (e) arch
length discrepancy, (f) heredity, (g) orofacial musculature, (h) intra-oral forces,
(i) extraoral forces or (j) oral habits? Or is
it a combination of all the above?
The literature is filled with quality research studies attempting to discover
answers to why relapse occurs, and despite decades of research, lower anterior
crowding is still unpredictable (Freitas,
K., Freitas, M., Henriques, J., Pinzan, A.,
& Janson, G., 2004). “The degree of postretention anterior crowding is both
unpredictable and variable and no pretreatment variables either from clinical
findings, casts, or cephalometric radiographs before or after treatment seem to
be useful predictors” (Little, 1999, p.191).
For many years, the implication has
been that nonextraction orthodontic
cases might result in a higher percentage of postretention lower anterior
crowding compared to extraction cases,
but do they? Review of the literature
regarding the effects that third molars
have on lower anterior crowding presents both agreement and opposition for
both sides of the problem, but the bulk
of the evidence seems to indicate that
third molars play an insignificant role in
lower anterior crowding.
Parallel studies often show dissimilar
deductions, and, more than likely, the
problem is multifactorial. Bramante
(1990) noted that in the 1930s Dr. Charles
Tweed redirected orthodontic treatment
procedures to extraction therapy with
the removal of four first premolars as a
more disciplined approach to effective
orthodontic treatment. He added: “Fifty
years later, we have found that extraction treatment and uprighting lower incisors does not prevent long-term postretention crowding and that flattened
profiles are not always esthetically desirable” (p. 91).
Form and function certainly underlie
growth and development in the craniofacial skeleton and the role that the biological environment plays. According to
Carlson (1999), the “form-function” principle of craniofacial biology in general
was attractive but primarily to account
for the factors that may have influenced
broad morphological variation and
change associated with the evolution of
the whole complex. Carlson added that
the form-function principal is much
less effective in explaining variations of
craniofacial form, growth and treatment
outcomes associated with causes of skeletal discrepancies and malocclusion.
So where does the discussion of lower
incisor crowding end? Is the problem
multifactorial, a product of improper
orthodontic treatment modalities (or
techniques), form vs. function, or does
genetics play a large part in creating or
solving the problem?
We can go on and on discussing virtues of the many possibilities and
causative factors involved with postretention relapse of lower incisor crowding, but here we are in the 21st century
and cannot provide an absolute answer
to the riddle of postreatment stability.
It is still an important objective but also
still a scar of orthodontics.
Answers may never be absolutely
identified, which, of course, begs consideration for some form of indefinite retention in almost all cases. However, we
shouldn’t feel totally alone with regard
to our knowledge (or lack of knowledge)
for an absolute answer to why relapse of
postretention tooth movement occurs
because, according to our medical colleagues at the Mayo Clinic (n.d.), even
after years of research, physicians still
have no cure for the common cold either.
‘The literature is filled with quality research studies
attempting to discover answers to why relapse occurs,
and despite decades of research, lower anterior
crowding is still unpredictable ...’
2)
3)
4)
5)
Publisher & Chairman
Torsten Oemus t.oemus@dental-tribune.com
President/Chief Executive Officer
Eric Seid e.seid@dental-tribune.com
Editor in Chief ORTHO Tribune
Prof. Dennis Tartakow
d.tartakow@dental-tribune.com
International Editor Ortho Tribune
Dr. Reiner Oemus r.oemus@dental-tribune.com
group editor
Kristine Colker k.colker@dental-tribune.com
Managing Editor ORTHO Tribune
Sierra Rendon s.rendon@dental-tribune.com
Managing Editor
Fred Michmershuizen
f.michmershuizen@dental-tribune.com
References
1)
ORTHO TRIBUNE
Bramante MA. (1990). Controversies in orthodontics. “Dental Clinics of North America”; 34(1):91-102.
Carlson, DS. (1999). Growth modification:
From molecules to mandibles. “Growth
Modification: What Works, What Doesn’t,
and Why?” McNamara JA (ed.). Craniofacial
Growth Series 35, The University of Michigan, Ann Arbor, MI.
Freitas, K., Freitas, M., Henriques, J., Pinzan,
A., & Janson, G. (2004). Postretention relapse of mandibular anterior crowding in
patients treated without mandibular premolar extraction. American Journal of Orthodontics and Dentofacial Orthopedics,
125, 480–487.
Little, R. (1999). Stability and relapse of mandibular anterior alignment: University of
Washington Studies. “Seminars in Orthodontics,” 5, 3, pp. 191-204.
Mayo Clinic. (n.d.) Cold remedies: What
works, what doesn’t, what can’t hurt ...
Common Cold. Retrieved on April 29, 2013
from www.mayoclinic.com/health/coldremedies/ID00036.
Managing Editor
Robert Selleck, r.selleck@dental-tribune.com
product/Account Manager
Humberto Estrada h.estrada@dental-tribune.com
product/Account Manager
Will Kenyon w.kenyon@dental-tribune.com
product/Account Manager
Jan Agostaro j.agostaro@dental-tribune.com
Marketing director
Anna Wlodarczyk-Kataoka
a.wlodarczyk@dental-tribune.com
Education DIRECTOR
Christiane Ferret c.ferret@dtstudyclub.com
Tribune America, LLC
116 West 23rd Street, Suite 500
New York, NY 10011
Phone (212) 244-7181
Fax (212) 244-7185
Published by Tribune America
© 2013 Tribune America, LLC
All rights reserved.
Tribune America strives to maintain the utmost accuracy in its news and clinical reports. If you find a
factual error or content that requires clarification,
please contact Managing Editor Sierra Rendon at
s.rendon@dental-tribune.com.
Tribune America cannot assume responsibility for
the validity of product claims or for typographical
errors. The publisher also does not assume responsibility for product names or statements made by
advertisers. Opinions expressed by authors are their
own and may not reflect those of Tribune America.
Editorial Board
Image courtesy of Dr. Earl Broker.
Corrections
Ortho Tribune strives to maintain the utmost
accuracy in its news and clinical reports. If
you find a factual error or content that
requires clarification, please report the details
to Managing Editor Sierra Rendon at
s.rendon@dental-tribune .com.
Tell us what you think!
Do you have general comments or criticism you
would like to share? Is there a particular topic
you would like to see articles about in Ortho
Tribune? Let us know by emailing feedback@
dentaltribune. com. We look forward to hearing
from you! If you would like to make any change
to your subscription (name, address or to opt
out) please send us an email 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 6 weeks
to process.
Jay Bowman, DMD, MSD (Journalism & Education)
Robert Boyd, DDS, MEd (Periodontics & Education)
Earl Broker, DDS (T.M.D. & Orofacial Pain)
Tarek El-Bialy, BDS, MS, MS, PhD
(Research, Bioengineering & Education)
Donald Giddon, DMD, PhD (Psychology & Education)
Donald Machen, DMD, MSD, MD, JD, MBA
(Medicine, Law & Business)
James Mah, DDS, MSc, MRCD, DMSc
(Craniofacial Imaging & Education)
Richard Masella, DMD (Education)
Malcolm Meister, DDS, MSM, JD (Law & Education)
Harold Middleberg, DDS (Practice Management)
Elliott Moskowitz, DDS, MSd (Journalism & Education)
James Mulick, DDS, MSD
(Craniofacial Research & Education)
Ravindra Nanda, BDS, MDS, PhD
(Biomechanics & Education)
Edward O’Neil, MD (Internal Medicine)
Donald Picard, DDS, MS (Accounting)
Howard Sacks, DMD (Orthodontics)
Glenn Sameshima, DDS, PhD (Research & Education)
Daniel Sarya, DDS, MPH (Public Health)
Keith Sherwood, DDS (Oral Surgery)
James Souers, DDS (Orthodontics)
Gregg Tartakow, DMD (Orthodontics) & Ortho
Tribune Associate Editor
[3] =>
Ortho Tribune U.S. Edition | AAO review 2013
clinical study
3
Muscling in on the truth
A look at the
causes of
malocclusion
By Dr. Rohan Wijey, BOralH, Grad Dip Dent
(Griffith)
D
ebate on the causes of malocclusion has been raging since
the genesis of the orthodontic science, but has the answer already been found?
Various factions in the orthodontic
tradition have declared the influence
of both environmental and genetic determinants in malocclusion. Common
consensus regards tooth position to be
more environmentally influenced and
skeletal development more genetically.
Genetic factors
Lauc et al (2003) claim that genetic factors are significant in malocclusion, citing a number of studies of twins. However, sibling genetic correlations are
intrinsically fallacious in that they do
not consider the influence of shared environments, which Garn et al (1979) have
termed the “co-habitational effect.”
Nonetheless, certain traits do seem to
be characteristic among family members, and a possible explanation is that
all animals seem to inherit certain muscular functions; Wiley (1962) describes
the mating ritual of the three-spined
stickleback, stating “the pattern and
sequence of these movements is just as
much a part of the genetic make-up of
the fish as its body shape.”
Epidemiological studies of malocclusion show it does not follow Mendelian
laws of inheritance. Mew (1986) cites the
example of sickle cell anemia, which
provides near immunity to malaria. It
has become endemic in populations
where it is an asset for survival, and it
displays a progressive familial and geographic spread.
Malocclusion, however, has shown no
type of progressive spread, with every
permutation found in every corner of
the globe. An evolutionary change of
this magnitude would also require millions of years, not one generation, and
furthermore what genetic advantage
has malocclusion provided for this supposed evolutionary change to materialize?
Certainly, there is a quality of irrationality to the genetic model for the etiology of malocclusion, but what is the
answer?
Environmental factors
Evidence for environmental causes is
formidable. Weiland et al (1997) compared skulls from 19th century Austrian
males with their contemporaries, finding that change in diet ensured the latter displayed significantly higher malocclusion scores.
Corruccini and Lee (1984) reported
that malocclusion was significantly
worse in Chinese children born in the
United Kingdom compared to their immigrant parents, raised in less developed areas. Because genetic factors remained unchanged, the malocclusion in
the offspring was attributed to diet, premature deciduous tooth loss from caries
and oral respiration.
Corruccini and Beecher (1981, 1983,
1984) have also shown that a soft diet
significantly increases dental and skeletal malocclusions in rats, macaques and
primates.
This is most likely because of less tonicity in muscles of mastication, resulting in compensatory overactivity in
muscles of facial expression.
Perhaps most telling has been Harvold’s series of experiments on primates
in which induced oral respiration caused
a range of malocclusions but all included
increased face height, steeper mandibular place and larger gonial angle — in
short, skeletal and dental discrepancies.
Harvold’s summation was that oral respiration was the trigger factor, but it is
“deviant muscle recruitment” that directly causes maldevelopment.
The weight of the evidence, be it from
the genetic or environmental school,
seems to rest with muscle dysfunction
being the cause of malocclusion.
Texture and nutritional value of diet
has been shown to have an impact on tonicity of facial muscles, oral respiration
causes “deviant muscle recruitment”
and even from the genetic standpoint,
the animal kingdom shows a marked
tendency for muscle function (and dysfunction) to be inherited.
P.R. Begg’s seminal 1954 manifesto asserted that a lack of grit in modern diets
results in less interproximal wear and
subsequently more crowding.
Although Begg believed that this environmental factor caused dental crowd” See MUSCLE, page 4
AD
[4] =>
clinical study
4
Ortho Tribune U.S. Edition | AAO review 2013
“ MUSCLE, Page 3
ing, his theory was predicated on the
belief that skeletal form is inherited and
unmalleable.
Curruccini (1990), however, discredited this research and recognized that
Begg’s own figures render his theory
redundant because both crowding and
attrition increase with age.
Despite being roundly refuted, Begg’s
assertion still serves as the rationale
and justification for orthodontists to
shorten dental arches via extractions to
this day.
Case study
This 13-year-old girl’s profile (Figs. 1a–1d)
shows a severely underdeveloped mandible, with a subsequent overbite. The
strain of the mentalis muscle also betrays a “reverse swallow” with mentalis
activity, which is the cause of this skeletal malocclusion.
After six months of myofunctional
appliance use and myofunctional therapy, the release of muscle tension has allowed the mandible to translate anteriorly, with seemingly spontaneous lower
dental alignment also a happy bonus
(Figs. 2a–2d).
In spite of the evidence, the industry
holds the concept of muscular causes of
malocclusion at arm’s length. Because
when it is acknowledged, then the moral
imperative for big changes will be inescapable.
That time is now.
Fig. 1a–1d: Before treatment, December 2009.
References
1)
2)
3)
4)
5)
6)
7)
8)
9)
Lauc et al. (2003) Effect of inbreeding and
endogamy on occlusal traits in human
isolates. Journal of Orthodontics 30 (4).
Garn SM, Cole PE, Bailey SM (1979) Living
together as a factor in family-line resemblances. Human Biology 51.
Wiley, John and Son (1962) Ichthylogy,
New York.
Weiland FJ, Jonke E, Bantleon HP (1997)
Secular trends in malocclusion in Austrian
men. European Journal of Orthodontics 19
Corruccinni RS, Lee GTR (1984) Occlusal
variation in Chinese immigrants to the
United Kingdom and their offspring. Archives of Oral Biology 29.
Beecher RM, Corruccini RS (1981) Effects
of dietary consistency on craniofacial and
occlusal development in the rat. The Angle Orthodontist; Beecher RM, Corruccini
RS (1983) Craniofacial correlates of dietary
consistency in a nonhuman primate; Corruccini RS (1984) An epidemiologic transition in dental occlusion in world populations. American Journal of Orthodontics.
Harvold EP et al (1981) Primate experiments on oral respiration, American Journal of Orthodontics 79 (4).
Begg PR (1954) Stone Age man’s dentition.
American Journal of Orthodontics 40.
Curruccini RS (1990) Australian aboriginal
tooth succession, interproximal attrition,
and Begg’s theory. American Journal of
Orthodontics and Dentofacial Orthopedics 97.
About the author
Dr. Rohan Wijey works for Myofunctional Research Company (MRC) on the Gold Coast, Australia. He practices myofunctional orthodontics at its
clinical arm, MRC Clinics, and teaches dentists and
orthodontists from around the world about early
intervention and the MRC myofunctional orthodontic appliances.
Fig. 2a–2d: May 2010.
‘In spite of the evidence, the industry holds
the concept of muscular causes of
malocclusion at arm’s length. Because
when it is acknowledged, then the moral
imperative for big changes will be inescapable.’
[5] =>
Ortho Tribune U.S. Edition | WINTER 2012
CLINICAL
5
[6] =>
[7] =>
[8] =>
events
8
Ortho Tribune U.S. Edition | AAO review 2013
Boston’s Yankee Dental Congress
expands on team-development day
28,000 expected
at 2014 gathering
The bustling exhibit hall
at the 2013 Yankee Dental
Congress reflects the
meeting’s strong
attendance figures —
nearly 30,000.
Photo/Provided by Yankee
Dental Congress
AD
Organizers of the 2014 Yankee Dental
Congress invite dental professionals to
join 28,000 fellow professionals from
Jan. 29 to Feb. 2 at the Boston Convention
& Exhibition Center.
With a general theme centered on the
concept of overall health starting with
oral health, the YDC meeting offers the
chance to explore and discover best practices, products and resources to improve
your practice, increase your knowledge
and better serve your patients.
Organizers describe Yankee Dental
Congress 2014 as being the best opportunity in New England for every member
of the dental practice to participate in a
wide variety of programs.
YDC 2014 highlights include:
• The Ritz-Carlton Leadership Center —
Back by popular demand, this program
promotes performance and practice excellence by developing your leadership
skills and creating the best possible service for your patients. Courses include
“The Fire Within — Igniting Passion for
Ritz-Carlton Performance Excellence,”
and “Legendary Service with a Smile,”
both presented by Jennifer Blackmon.
• Hands-on cadaver programs — This
unique opportunity enables participants
to attend hands-on courses using cadavers while exploring topics that cover areas such as anesthesia, crown lengthening and anatomy.
• “Evolutionary Dentistry” — Hear
about the research and activities at the
Manot Cave Dig in Israel and discuss the
relationship of evolutionary biology to
modern dental problems in a session led
by Mark Hans, DDS, and Bruce Latimer,
PhD.
• The Pankey Institute: Update 2014 —
Discover new techniques and innovative
approaches in treatment planning that
will have a valuable impact on your practice. The series includes three courses featuring speakers Greggory Di Lauri, DDS,
Matthew Messina, DDS, and Kenneth Myers, DDS.
• “Master the Skills of Marketing Your
Practice in One Day” — A one-day symposium designed to help expand your practice with the power of marketing. Courses
include “High Energy Marketing to Explode Your New Patient Numbers,” “Secrets of Social Media Success and Online
Marketing,” “Get Noticed, Get Booked,
and Grow Your Practice” and “Best Practices for Leveraging Social Media to Engage Patients.”
• Dental Team Playbook: Strategies for
Success (an expansion on the popular
team-development day) — Your entire
dental team can benefit from this oneday program with courses tailored to
dental assistants, hygienists and office
personnel. Team members can learn from
experts in their respective fields. Presenters include Lois Banta, Amy Kirsch, RDH,
Shannon Pace Brinker, CDA, Diane Peterson, RDH, and Anastasia Turchetta, RDH.
• Social media hot spot — Learn how
effectively utilizing social media such
as Facebook, Instagram, LinkedIn and
Twitter can help improve practice performance by drawing new patients in and
keeping current patients connected to
your dental practice.
For more information, please visit
www.yankeedental.com.
(Source: Yankee Dental Congress)
[9] =>
[10] =>
10
a AO meeting
Ortho Tribune U.S. Edition | AAO review 2013
“ AAO, Page 1
To spice things up, the AAO offered
social activities each day, such as a
Fun Run & Walk or an AAO Foundation
Breakfast to give honor to key volunteers for their work within the AAOF.
Educational sessions covered topics such as, “New Frontiers in the Early
Treatment of Class III Malocclusion,”
“Missing Maxillary Lateral Incisors:
New Procedures and Indications for
Space Closure,” “Incorporating New
Technologies and Advances to Orthognathic Surgery” and “Tips & Tricks for
the Digital Office,” among much more.
Staff sessions included a range of topics from orthodontic digital photography, staff training, risk management,
infection prevention, fee collection and
more.
The AAO also had its popular featured
speaker series, which included a session
by best-selling author Dr. Barry Sears.
Sears’ presentation, “Why We Gain
Weight, Get Sick and Age Faster,” explored the changes in the American diet
in the last 40 years that have turned on
ancient inflammatory genes that are
the underlying cause of our obesity and
health-care crisis.
He said the insidious aspect of this increased inflammation is that it is below
the perception of pain, which means
you ignore its presence until there is
enough organ damage that we call it
chronic disease. Only by understanding the dietary causes of this epidemic
can you then can establish a dietary
program to reverse the inflammatory
damage being caused by seemingly minor changes in the human diet, he explained.
For orthodontists or team members
who came to the show looking to stock
up on supplies or looking for fun new
products to bring home to the office,
the exhibit hall was brimming with
new technology and other treats.
Here is a sampling of the hundreds of
unique products, free samples and fun
treats that were available to AAO attendees in the exhibit hall:
• BracketEars are a fun way to match
your braces to your earrings. They are
little earrings shaped like a bracket, and
with multi-colored elastic packs, you
can match them to the color in your
mouth! This brand new accessory is also
available at Amazon.com.
• To spice up the day, attendees could
stop by the circus-like booth from
OrthoBanc where folks were “getting
silly in Philly”! The booth had complimentary sno-cones and cotton candy
for attendees to enjoy while they let
OrthoBanc explain how it can simplify
your account management.
• Want to help your patients floss more
often? Let them try FlossFish! FlossFish
uses regular dental floss and goes under
the wire and between the brackets so
that users can floss with braces on without the fuss of using floss threaders.
• For clinicians who have a few patients playing on sports teams, the
TotalGard booth was displaying its new
swirl-colored mouthguards. TotalGard
offers sports mouthguards, Class II activating appliance mouthguards and
AAO attendees work their way through the registration at the annual meeting in May. Next year’s meeting will take place April 25–29 in New
Orleans. Photo/Sierra Rendon, Managing Editor
HOW TO WIN! Bring this card to the i-CAT booth
for a fierce match-up of imaging technologies.
LEAVE NO QUESTIONS UNANSWERED!
• 3D vs 2D imaging dose comparison
• 3D imaging advantages
• Complete treatment tools and software
• Strength of product
Sesame Communications’ booth at the AAO
draws a lot of attraction with its bright
colors and its on-display Vespa!
The i-CAT’s AAO show activity generated
booth visits for the company’s new product,
i-CAT FLX.
The i-CAT booth displays the debut of the
i-CAT FLX.
Photo/Provided by Sesame Communications
Photo/Provided by Imaging Sciences
Photo/Provided by Imaging Sciences
StressGard II, a comfortable easy-fit
night guard for TMJ pain, teeth clenching and grinding.
• Orthodontists who have been considering clear aligners could visit the
ClearCorrect booth to hear more about
its many options. Dr. Willis Pumphrey,
founder of ClearCorrect, said he introduced ClearCorrect to keep clear aligner
therapy simply, friendly and affordable,
and he said you’ll save about 40 percent
by using his company’s product.
• Another fun way to help your patients show off their style is with
Braced-lets. These colorful bracelets —
made with actual braces — were created
and designed by orthodontists Dr. Marc
Lemchen and Dr. Jennifer Salzer along
with jewelry designer Lisa Salzer of Lulu
Frost.
Dr. Barry Sears was a part of the AAO’s
featured speaker series.
Dr. Laura Berman spoke at the AAO’s annual
meeting as part of its featured speaker series.
*Data on file
BOOTH #111
Next year’s AAO annual meeting will take place April 25–29 in New Orleans.
[11] =>
Ortho Tribune U.S. Edition | AAO review 2013
Industry
11
Henry Schein introduces new line
of Acclean Orthodontic Toothbrushes
Brushes offer
‘thorough hygiene
experience’
Henry Schein introduces a new line
of double-ended Acclean® orthodontic
toothbrushes with an interdental brush
that removes debris between braces,
teeth and hard-to-reach areas.
The V-shaped, oval-trimmed brush
head provides better access to posterior
teeth with the help of soft, easy-to-hold
handle grips. The rounded, diamondpolished bristles made of soft DuPont™
Tynex® natural filament offer gentle,
effective cleaning around bands, wires,
brackets, implants, and gingivae.
Acclean Orthodontic toothbrushes
come in assorted colors and are available
in a 12-count box.
Henry Schein is the exclusive distributor of Henry Schein Brand products.
For additional information, please contact Henry Schein Dental at (800) 3724346 (from 8 a.m. to 9 a.m. EDT) or visit
the website at www.henryscheindental.
com.
Henry Schein has introduced
a new line of double-ended
Acclean orthodontic
toothbrushes.
Photo/Henry Schein
New technology helps
improve 3-D images
Gendex introduces Scatter Reduction Technology
to deliver a new level of clarity and details
G
endex introduces SRT™,
Scatter Reduction Technology,
to
its
awardwinning GXDP-700™ conebeam 3-D system.
This new feature allows clinicians
to reduce artifacts caused by metal or
radio-opaque objects, such as restorations, endodontic filling materials and
implant posts.
The use of SRT image optimization technology delivers 3-D scans
with higher clarity and detail around
scatter- generating material.
SRT represents a significant aid when
3-D scans are required for a variety of
procedures, from endodontic to restorative and the post-surgical assessment
of implant sites.
“We continue to make significant investments in research and development
to bring new, meaningful innovations
to the market,” says Mike Bosha, senior
product manager for Gendex.
“Our proprietary SRT technology further enhances the diagnostic capabilities of the modular GXDP-700 Series.”
The introduction of SRT to the GXDP700 platform aligns with the Gendex
design philosophy focused on delivering innovations with clinicians and patients in mind.
The activation of SRT is simple: When
a scan is prescribed near a known area
of scatter-generating material, the user
needs only to select the SRT button from
the GXDP-700 touchscreen interface.
About Gendex Dental Systems
Gendex offers a wide variety of compre-
The GXDP-700. Photo/Provided by Gendex
hensive digital imaging solutions for
both general dentists and specialists.
The company’s history in continuing innovation, along with a dedication to delivering products that exceed the needs
of dental professionals, has earned Gendex recognition as a global leader, according to the company.
Learn more about the full line of Gendex products at www.gendex.com.
Ormco
unveils
‘Damon
Smile’
Ormco Corp., a leading manufacturer and provider of advanced orthodontic technology and services, has
introduced Damon® Smile, the new
consumer-facing name for the company’s
flagship product, the Damon® System.
The rebranding approach is part of
Ormco’s mission to help orthodontists
achieve their clinical and practice management objectives, as the new name
enhances the consumer appeal of the
Damon System and aids with increasing
patient starts.
“Ormco is committed to driving more
patients into our customers’ doors. The
new Damon Smile branding further advances our efforts to elevate consumer
awareness around the remarkable advantages of orthodontic treatment with the
same clinically-proven Damon System,”
said Vicente Reynal, president of Ormco.
“The word ‘smile’ is not only relatable, it
builds an emotional connection among
patients and we’re confident our doctors
will be able to capitalize on this connection when integrating the Damon Smile
brand into their consultation and practice marketing strategies.”
The Damon System is an orthodontic
treatment that uses low-friction passive
self-litigating brackets, high-tech lightforce archwires and minimally invasive
protocols for patient results. Damon
Clear™ is a virtually invisible option —
ideal for today’s image-conscious adults
and teens — that offers clear brackets for
the upper and lower arches.
More than 3 million patients have received orthodontic treatment with the
Damon System.
Connect with Ormco on Facebook at
facebook.com/damomsystembraces or on
Twitter at @Ormco and @DamonBraces.
For more information, visit the Ormco
website at www.ormco.com.
[12] =>
)
[page_count] => 12
[pdf_ping_data] => Array
(
[page_count] => 12
[format] => PDF
[width] => 765
[height] => 1080
[colorspace] => COLORSPACE_UNDEFINED
)
[linked_companies] => Array
(
[ids] => Array
(
)
)
[cover_url] =>
[cover_three] =>
[cover] => ![Ortho Tribune U.S. No. 3+4, 2013]()
[toc] => Array
(
[0] => Array
(
[title] => AAO brings it to Philly
[page] => 01
)
[1] => Array
(
[title] => Postretention relapse of mandibular anterior crowding
[page] => 02
)
[2] => Array
(
[title] => Muscling in on the truth
[page] => 03
)
[3] => Array
(
[title] => Boston’s Yankee Dental Congress expands on team-development day
[page] => 08
)
[4] => Array
(
[title] => AAO meeting
[page] => 10
)
[5] => Array
(
[title] => Industry
[page] => 11
)
)
[toc_html] =>
Table of contents
[toc_titles] => AAO brings it to Philly
/ Postretention relapse of mandibular anterior crowding
/ Muscling in on the truth
/ Boston’s Yankee Dental Congress expands on team-development day
/ AAO meeting
/ Industry
[cached] => true
)