Pacific Coast Society of Orthodontists Bulletin Fall 2021 - 39

Case Report
a symmetrical U-shape. As Class I occlusion
was bilaterally achieved, the maxillary midline
initially shifted 1 mm to the right side
and became coincident as well (Figures 9
and 10; Table 2). The patient was very happy
with her result. The great result was possible
with her excellent compliance. In addition
to maintaining good oral hygiene as well as
elastic wearing, she endured the C-palatal
plate well despite the failure of the anterior
miniscrew. The patient reported that she
stopped snoring after the tonsillectomy,
which was performed at the beginning of
her orthodontic treatment journey, which
also set up a favorable circumstance for
orthodontic treatment. The ABO Cast Radiograph
Evaluation score was 16 (Figure 11).
Editor's Comments
Since the concept of C-palatal plate was
introduced, it has been modified to " simplify
the placement procedure " and improve patient
comfort and efficiency of desired tooth
movement.1
The C-palatal plate has been
used for total arch distalization for a few
years since it was first reported.2
The three
miniscrews used to fix the C-palatal plate
provide sufficient stability to withstand
the necessary distal forces, and in this case,
when one miniscrew failed, the authors
were able to fulfill the mission. The longterm
skeletal and dental treatment could
be maintained based on a recent published
study by Chou et al.3
ple applications including distalization.
References
1. Kook YA, Kim SH, Chung KR. A modified palatal
anchorage plate for simple and efficient distalization.
J Clin Orthod 2010;44(12):719-730.
2. Jung CY, Park JH, Ku JH, Lee NK, Kim Y, Kook
YA. Dental and skeletal effects after total arch
distalization using modified C-palatal plate on
hypo- and hyperdivergent Class II malocclusions
in adolescents. Angle Orthod 2021;91(1):22-29.
3. Chou AHK, Park JH, Shoaib AM, et al. Total maxillary
arch distalization with modified C-palatal
plates in adolescents: a long-term study using
cone-beam computed tomography. Am J Orthod
Dentofacial Orthop 2021;159(4):470-479.
Table 2. Comparison of Pretreatment and Posttreatment Cephalometric
Measurements
Cephalometric
Measurement
SNA (°)
SNB (°)
ANB (°)
Wits (mm)
FMA (FH-MP) (°)
SN-MP (°)
U1 - NA (mm)
U1 - SN (°)
L1 - NB (mm)
IMPA (L1-MP) (°)
Upper lip to E-plane (mm)
Lower lip to E-plane (mm)
Norm
82.0
80.0
2.0
0.0
25.0
32.0
4.0
104.0
4.0
90.0
−4.0
−2.0
Pretreatment
80.2
72.6
7.6
6.1
21.0
36.0
3.6
98.2
8.0
103.9
1.7
2.5
Posttreatment
80.2
72.7
7.5
3.1
20.6
35.5
0.5
89.4
8.6
101.0
1.1
3.2
This palatal anchorage
device seems promising and can be added to
an orthodontist's armamentarium for multiFigure
10. Superimpositions: black, pretreatment; red, posttreatment.
Fall 2021 PCSO Bulletin
39

Pacific Coast Society of Orthodontists Bulletin Fall 2021

Table of Contents for the Digital Edition of Pacific Coast Society of Orthodontists Bulletin Fall 2021

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