Both maxillary and mandibular crowding extents were correlated negatively with Δ OP-FH and Δ Y-Axis (marginally significant in the case of maxillary crowding against Y-Axis) and positively with Δ NPog-FH (Table 6 ).
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Effects of clear aligners on the vertical position of the molar teeth and the vertical and sagittal relationships of the face: a preliminary retrospective before-after clinical trial.
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