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

Related Articles

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

Angle Orthod. 2016 Mar 3;

Authors: Choi SH, Shi KK, Cha JY, Park YC, Lee KJ

Abstract
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.

PMID: 26938955 [PubMed - as supplied by publisher]

from #MedicinebyAlexandrosSfakianakis via xlomafota13 on Inoreader http://ift.tt/21PTnPI
via IFTTT