Pacific Coast Society of Orthodontists Bulletin Summer 2022 - 56

Case Report
Table 2. Comparison of Prettreatment and Posttreatment
Cephalometric Measurements
Norm
Cephalometric
Measurement
SNA (°)
SNB (°)
ANB (°)
Wits (mm)
FMA (FH-MP) (°)
SN-MP (°)
Figure 12. Superimpositions: black, pretreatment; red, posttreatment
Editor's
Comments
The major challenge of this case lies in correcting the posterior
crossbite, and MARPE has become increasingly common among
young adults and even more mature adults. One recent systematic
review and meta-analysis on the effectiveness of MARPE
found that the success rate can be as high as 88.7% to 96.3%
(95% confidence interval).3
A more recent article concluded that
it could " successfully expand the constricted maxilla in late adolescents
and adult patients " and also found that the maxillary first
molars can have 2° to 8° buccal tipping following the expansion
with MARPE.4
As a result, we still need to be cautiously optimistic
when applying this modality to treat the transverse deficiency,
especially for those cases with anterior open bite. The editor
congratulates the authors for managing this case fairly well and
achieving great results.
References
1. Brunetto DP, Sant'Anna EF, Machado AW, Moon W. Non-surgical
treatment of transverse deficiency in adults using microimplant-assisted
rapid palatal expansion (MARPE). Dental Press J Orthod 2017;22:110-125.
2. Lione R, Franchi L, Huanca Ghislanzoni LT, Primozic J, Buongiorno M,
Cozza P. Palatal surface and volume in mouth-breathing subjects evaluated
with three-dimensional analysis of digital dental casts: a controlled
study. Eur J Orthod 2015;37:101-104.
3. Kapetanović A, Theodorou CI, Bergé SJ, Schols J, Xi T. Efficacy of
miniscrew-assisted rapid palatal expansion (MARPE) in late adolescents
and adults: a systematic review and meta-analysis. Eur J Orthod
2021;43:313-323.
4. Siddhisaributr P, Khlongwanitchakul K, Anuwongnukroh N, Manopatanakul
S, Viwattanatipa N. Effectiveness of miniscrew assisted rapid palatal
expansion using cone beam computed tomography: A systematic
review and meta-analysis. Korean J Orthod 2022;52:182-200.
Figure 13. ABO cast radiograph evaluation score
U1-NA (mm)
U1-SN (°)
L1-NB (mm)
IMPA (L1-MP) (°)
Upper lip to E line (mm)
Lower lip to E line (mm)
82.0
80.0
2.0
0.0
25.0
32.0
4.0
104.0
4.0
90.0
−4.0
−2.0
86.2
82.2
4.0
−2.2
19.9
32.7
6.8
114.8
11.5
107.6
2.1
4.4
87.5
83.1
4.3
−3.4
20.6
33.3
2.7
101.1
7.3
89.4
−1.5
−1.4
Pretreatment Posttreatment
56
PCSO Bulletin Summer 2022

Pacific Coast Society of Orthodontists Bulletin Summer 2022

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