Fig. 3

Degree of labiolingual tipping of the maxillary central incisor as a function of the amount of lingual displacement of the CR. Positive signs indicate lingual crown tipping and negative signs lingual root tipping. C-8 represents the conventional 0.019 × 0.025-in archwire with 8 mm power arm, and D-14 the dual-section archwire with 14 mm power arm, for instance