Pacific Coast Society of Orthodontists Bulletin Summer 2022 - 41

PCSO Program Talk
correction of AOB, various treatment approaches are
available, aiming to achieve posterior intrusion, anterior
extrusion, or a combination of the two. Some clinicians
may recommend extraction of the second premolars
to take advantage of the " wedge effect " to attempt
to close the AOB during space closure.6
Recently, the
use of clear aligners in open bite correction has been
popularized because of their posterior biteplate effect.7
In addition, miniscrews have been popularized in
the correction of open bites in the past decade.3
For
surgical correction of AOB, multiple surgical approaches
have been introduced and used. However, posterior
maxillary impaction has been the most popular surgical
correction method for open bite correction.8
Survey of 12 Orthodontic Programs: Open Bite
Correction
The chairpersons and the clinic directors of all PCSO
postgraduate orthodontic programs were emailed
The response rate (approximately 33%) to this survey
was not very high for various reasons, such as inability
to access the data, data error, being short staffed,
and so on (Table). However, there have been active
research activities around this topic in the field for the
past two decades, and a couple of PCSO orthodontic
programs have been leading these research activities.
For example, the University of Washington has been
leading the research through the National Dental
Practice-Based Research Network (NDPBRN) Adult
Anterior Open Bite Study. Similarly, the University of
the Pacific has been conducting and sharing their research
results concerning the use of clear aligners for
a questionnaire regarding the prevalence of AOB in
their orthodontic clinic, the prevalence of habitual
etiology for open bites, and types of AOB treatment
modalities used in their clinics. The following summarizes
the results of the survey.
University of Washington
Approximately 5
University of Alberta
5
Unknown
We typically employ tongue cribs and
occasionally refer a patient to a myofunctional
therapist.
Most of our patients with AOB have fixed
appliance therapy. Fixed appliance to clear
aligner ratio for open bite correction = 4:1.
Unknown, particularly since there is no
clear definition of " skeletal open bite. " Currently,
approximately 30% of the patients
are planned for surgery.
None
Majority of them
Approximately 20%
No specific protocol, although we suspect
many faculty choose thermoformed
removable retainers ( " Essix " ) with occlusal
coverage for the purported intrusion effect.
It is difficult to accurately diagnose AOB
due to habits
First line of action tongue crib modifications,
tongue tamers also used. Myofunctional
therapy suggested but unlikely
patients go ahead (cost a barrier).
Individual faculty make the call. Clear aligners
are considered as a potential option.
AT Still University
5
90
Tongue spurs, cribs, tamers, myofunctional,
speech therapy, etc.
Maybe slight increase in clear aligners.
Due to the cost and time needed for
the surgery, the surgery frequently gets
declined.
10% surgery
Unanswered
Majority of them
Good numbers of them considering several
factors such as curve of Spee, dentoalveolar
discrepancy, Angle classification, etc.
No. Depends on the individual faculty's
preference and retention philosophy.
90% TADs
Approximately 75%
20%
No. Depends on the individual faculty's
preference and retention philosophy.
Summer 2022 PCSO Bulletin
41

Pacific Coast Society of Orthodontists Bulletin Summer 2022

Table of Contents for the Digital Edition of Pacific Coast Society of Orthodontists Bulletin Summer 2022

Pacific Coast Society of Orthodontists Bulletin Summer 2022 - 1
Pacific Coast Society of Orthodontists Bulletin Summer 2022 - 2
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Pacific Coast Society of Orthodontists Bulletin Summer 2022 - 41
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