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KMID : 0361920170470050313
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Korean Journal of Orthodontics
2017 Volume.47 No. 5 p.313 ~ p.322
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Stability of dental, alveolar, and skeletal changes after miniscrew-assisted rapid palatal expansion
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Lim Hyun-Mook
Park Young-Chel
Lee Kee-Joon
Kim Kyung-Ho
Choi Yoon-Jeong
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Abstract
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Objective: Miniscrew-assisted rapid palatal expansion (MARPE) is a means forexpanding the basal bone without surgical intervention in young adults. Here, we assessed the differences in dental, alveolar, and skeletal measurements takenbefore (T0), immediately after (T1), and 1 year after (T2) MARPE.
Methods: Twenty-four patients (mean age, 21.6 years) who had undergone MARPE and cone-beam computed tomography at T0, T1, and T2 were included. Changes in the following parameters were compared using paired t -tests: intercusp, interapex, alveolar, nasal floor, and nasal cavity widths; inclination of the first molar (M1) and its alveolus; and thickness and height of the alveolar bone. A linear mixed-effects model was used to determine variables that affected periodontal changes in the M1.
Results: MARPE produced significant increases in most measurements during T0?T2, despite relapse of some measurements during T1?T2. The alveolar thickness decreased on the buccal side, but increased on the palatal side. The alveolar crest level at the first premolar moved apically. Changes in the thickness and height of the alveolar bone were affected by the corresponding initial values.
Conclusions: MARPE can be used as an effective tool for correcting maxillomandibular transverse discrepancy, showing stable outcomes 1 year after expansion.
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KEYWORD
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Cone-beam computed tomography, Miniscrew-assisted rapid palatal expansion, Stability, Expansion
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