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Comparisons of the three-dimensional forces in groups A3 and A4. A, Forces in the buccolingual direction. B, Forces in the mesiodistal direction. C, Forces in the vertical direction.
Group A3, underwent 0.25-mm retraction and 0.25-mm intrusion; Group A4, underwent 0.50-mm retraction and 0.50-mm intrusion.
*p < 0.05.
