Table 5. Comparison of transverse dimensions before (T1) and after (T2) expansion measured on two-dimensional coronal images (n = 14).

Data are presented as mean ± standard deviation.

PM1, Maxillary first premolar; M1, maxillary first molar.

^*Wilcoxon signed-rank nonparametric test was performed because buccal alveolar height was not normally distributed. Other variables were analyzed by paired t-tests; ^†p < 0.01, ^‡p < 0.001.