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Values are presented as the mean ± standard deviation.
T0, Pretreatment; T1, post-treatment; ICW, intercanine width; IP1W, interfirst premolar width; IP2W, intersecond premolar width; IM1W, interfirst molar width; IM2W, intersecond molar width.
T0–T1 means the amount of change between pretreatment and post-treatment.
The paired t-test was performed to this analysis.
