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Nonsurgical miniscrew-assisted rapid maxillary expansion results in acceptable stability in young adults

 Sung-Hwan Choi  ;  Kyung-Keun Shi  ;  Jung-Yul Cha  ;  Young-Chel Park  ;  Kee-Joon Lee 
 Angle Orthodontist, Vol.86(5) : 713-720, 2016 
Journal Title
 Angle Orthodontist 
Issue Date
Adolescent ; Adult ; Cephalometry ; Dental Arch/pathology* ; Humans ; Maxilla ; Molar ; Palatal Expansion Technique* ; Young Adult
Adults ; MARME ; Stability ; Transverse maxillary deficiency
OBJECTIVE: To evaluate the stability of nonsurgical miniscrew-assisted rapid maxillary expansion (MARME) in young adults with a transverse maxillary deficiency. MATERIALS AND METHODS: From a total of 69 adult patients who underwent MARME followed by orthodontic treatment with a straight-wire appliance, 20 patients (mean age, 20.9 ± 2.9 years) with follow-up records (mean, 30.2 ± 13.2 months) after debonding were selected. Posteroanterior cephalometric records and dental casts were obtained at the initial examination (T0), immediately after MARME removal (T1), immediately after debonding (T2), and at posttreatment follow-up (T3). RESULTS: Suture separation was observed in 86.96% of subjects (60/69). An increase in the maxillary width (J-J; 1.92 mm) accounted for 43.34% of the total expansion with regard to the intermolar width (IMW) increase (4.43 mm; P < .001) at T2. The amounts of J-J and IMW posttreatment changes were -0.07 mm (P > .05) and -0.42 mm (P ?=? .01), respectively, during retention. The postexpansion change in middle alveolus width increased with age (P < .05). The postexpansion change of interpremolar width (IPMW) was positively correlated with the amount of IPMW expansion (P < .05) but not with IMW. The changes of the clinical crown heights in the maxillary canines, first premolars, and first molars were not significant at each time point. CONCLUSIONS: Nonsurgical MARME can be a clinically acceptable and stable treatment modality for young adults with a transverse maxillary deficiency.
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2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
박영철(Park, Young Chel)
이기준(Lee, Kee Joon) ORCID logo https://orcid.org/0000-0002-0782-3128
차정열(Cha, Jung Yul)
최성환(Choi, Sung Hwan) ORCID logo https://orcid.org/0000-0002-1150-0268
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