Changes in maxillary dental arch
Based on GLM for repeated measures (five time points), there were several significant differences between EG and LG at Mean values (mm) and SD for dental arch measurements at time points 

The total upper dental arch length (U1+U2+U3+U4) increased more in EG compared with LG at Changes in total dental arch lengths (mm) between time points The upper bilateral molar-incisal distance (U5+U6) showed more increase in EG compared with LG at The width between the upper canines (U7) increased more in EG compared with LG during the follow-up (Changes in dental arch widths (mm) between time points The transversal dimensions between the first upper molars (U8, U9) increased in both groups, but the EG reached the final width at 