acific Coast Society of Orthodontists Bulletin Summer 2018 - 28

Special Section

Retention: Survey Responses

RETENTION

University of California,
San Francisco

Arizona School of
Dentistry & Oral Health

University of the Pacific

University of Nevada,
Las Vegas

Do residents fabricate their
own retainers?

Yes (1st year only)

No

Yes

Yes

If so, approximately how
many of each type of retainer
does each resident fabricate?

Hawley: 3, vacuum-formed: 3, fixed: 3

Residents fabricate 10 Hawley-type
retainers for their requirement

All Essix and bonded

Hawley: 10, vacuum-formed: 40, fixed:
30

What percentage of patients
receive the following retainer
types?

Hawley: 80%, Essix: 5%, fixed: 15%

Hawley: 20%, vacuum-formed: 60%,
fixed: 20%

Hawley: 50%, Essix: 50%, fixed: 70%

Hawley: 20%, Essix: 80%, fixed: 30%

In patients receiving fixed
retainers, are overlay removable retainers also provided?

Yes, about 5% of them-Biostar 2 mm
blanks

Yes

Yes, usually Essix

Yes-vacuum-formed

How are final models for
retention taken?

Alginate impressions and intraoral
scanner

Alginate impressions

Intraoral scanner

95% alginate, 5% PVS, 50% intraoral
scanner

For each of the following
conditions, please note the
influence, if any, on retainer
choice:

Extractions: Hawley to hold ext site
together, Anterior open bite: posterior
occlusal cover on Hawley or Essix,
Deep bite: Hawley with bite plane,
Crowding: fiberotomy and bonded,
Spacing: Essix, Midline diastema:
Hawley with bonded, Posterior crossbite: Hawley, Anterior crossbite: Essix,
Phase I: Hawley with acrylic trimmed
away from transition teeth

Anterior open bite: usually Trutain,
Crowding: lower fixed, Spacing: fixed,
Midline diastema: fixed, Posterior
crossbite: Hawley, Phase I: always
Hawley type

Extractions: wraparound Hawley or
vacuum, Anterior open bite: Hawley,
Deep bite: Hawley with anterior bite
plate, Crowding: either, Spacing:
Hawley or vacuum, Midline diastema:
fixed, Posterior crossbite: Hawley,
Anterior crossbite: N/A, Phase I:
Hawley or fixed

Anterior open bite: Hawley, Crowding:
fixed. All other conditions have no
influence on retainer type.

Is there a general posttreatment retention protocol
taught at the school?

Varies with faculty

Yes

Varies with faculty

Yes

If yes, what is the protocol?

N/A

Full-time wear for 6 months; after
that, nighttime wear only

Usually full-time 3-6 months, then
nighttime wear

Full-time 6 months; nights for 6
months as necessary

At what time points are
patients seen for retainer
checks?

2 months, 6 months, 20 months, then
dismiss

1 month, 6 months, 1 year, as needed
after 1 year

6 weeks, 3 months, every 6 months
thereafter

1 month, then 3 months; two 6 month
checks as necessary

Does the university take postretention records? If so, at
what time point?

Yes-20 months

Yes-1 year

Yes-2 years post-treatment

Yes-at finish

How long after treatment
is the patient followed in
retention? Is the patient ever
dismissed?

Dismissed at 24 months unless issues

Follow up as needed after 1 year

2 years

18 months

Do you believe that the type
of retainer influences patient
compliance?

Maybe - perhaps Essix is easier?
Yes, more compliance with vacuumI don't know. Certainly bonded is more formed retainers.
compliant.

Yes, compliance is sometimes better
with Essix.

Yes, vaccum-formed is more esthetic
and easier to wear.

Estimate the percentage of
breakage with the following
retainer types:

Hawley: 5%, Essix: 1%, fixed: 10%

No records

Hawley: 20%, Essix: 30%, fixed: 30%

Hawley: 20%, Essix: 30%, fixed: 10%

How do you fix minor relapse
in the retention phase?

Removable-usually spring retainer
or clear aligners

Removable

Both fixed and removable-depends
on amount of relapse

Both fixed and removable depending
on what needs to be done

Do you charge the patient for
minor relapse if it is within
your retention period?

If they are at fault

No

Depends on the severity of relapse
and method of re-treatment

No

When do you charge a separate fee for retention visits?

After 24 months

Never

After 2 years

After 3 years

28

PCSO Bulletin  Summer 2018



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