Pacific Coast Society of Orthodontists Bulletin Summer 2017 - 63
Presentation Summary
The residual A-P correction will have to wait
until the patient reaches the pubertal growth
spurt; it has been shown that A-P correction
from the mandible is best achieved during the
peak pubertal growth spurt.
Molar Distalization
There are many different appliances for molar
distalization: the sliding jig, ACCO appliance,
Wilson molar distalizer, pendulum appliance,
distal jet, and coil spring.
One of the major side effects of molar distalization is anchorage loss.
Molar distalization is more efficient with the
help of skeletal anchorage devices. Dr. Ngan's
graduate clinic utilizes the bone-borne
expander sideways.
Case #2: 16-Year-Old Female
Diagnosis: Class II on right side, mild skeletal
dental asymmetry, thin upper lip and flat profile, severe mandibular curve of Spee, crowding of lower incisors, thin biotype.
Treatment considerations: Correct unilateral
Class II molar relationship and resolve mild
crowding without excessive proclination of
the incisors.
Treatment rendered: Comprehensive orthodontic treatment with straight wire appliance
and self-ligating bracket system. Light Class II
elastics (2 oz.) from the start of treatment.
Open coil spring with half activation (halfbracket distance of OCS). After engaging 7's,
still use 2 oz. Class II elastics for U3 to L7. Finish
and stabilize with U/L stainless steel wires.
Tips: Dr. Ngan highlights the significance
of using the stainless steel wires for at least
three to four months; this is critical for
post-treatment stability and will help with
arch coordination for improving buccal interdigitation.
Removable and Fixed Functional Appliances
Functional orthopedic treatment is defined as
the use of orthopedic tools to influence the
skeleton of the growing child in the condylar
and sutural areas to achieve skeletal improvement.
Removable functional appliances include the
activator, bionator, and Frankel regulator;
these appliances require patient compliance.
Fixed functional appliances, including MARA,
Forsus, and Herbst, are more popular in the
U.S. because compliance is not an issue.
These appliances transmit muscular forces to
guide the growth process and eruption of
teeth by utilization, activation, and inhibition
of natural forces that signify the growth and
eruption potential.
Case 2 progress photos
Summer 2017 PCSO Bulletin
63
Table of Contents for the Digital Edition of Pacific Coast Society of Orthodontists Bulletin Summer 2017
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