Orthotown November 2023 - 60

CONTINUING EDUCATION
Fig. 14: Before (top), after (bottom).
Fig. 16
Fig. 15: Before (left), after (right).
Initial: 37.46 mm
Final: 42.70 mm
Delta: +5.24 mm
maxilla to allow for relapse. Such
overcorrection is unnecessary when
expanding slowly with archwires.
But is it stable? Let's look at the
patient two years later, when he
was ready for Phase II (Fig. 16). You
can see that the Phase I archwire
expansion was extremely stable and
the permanent teeth erupted nicely,
including ectopic tooth #6. Fig. 17
demonstrates that intermolar width
actually increased by 0.95 mm during
Phase I retention.
Phase II was initiated and took
just 12 months with only five adjustment
visits to achieve an ideal result
(Fig. 18). Further, the patient's airway
patency remained outstanding
through the completion of treatment
(Fig. 19).
Conclusion
The use of full-fixed appliances for
the interceptive treatment of preadolescent
patients is a viable alternative
to traditional SME and mandibular
expansion appliances, and allows
the orthodontist to perform etiologybased
interceptive treatment that can
minimize, or even eliminate, the need
for additional phases of treatment.
It would be extremely beneficial
for our patients and our profession if
additional research was conducted
to substantiate the orthopedic and
dentoalveolar changes that occur
when full-fixed appliances are used
to expand and develop the arches of
preadolescent patients in the early
mixed dentition. OT
NOVEMBER 2023 | 60 | ORTHOTOWN.COM
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