PMID- 36504088 OWN - Quintessenz Verlags-GmbH CI - Copyright Quintessenz Verlags-GmbH OCI - Copyright Quintessenz Verlags-GmbH TA - Oral Health Prev Dent JT - Oral Health and Preventive Dentistry IS - 1757-9996 (Electronic) IP - 1 VI - 20 PST - epublish DP - 2022 PG - 517-524 LA - en TI - The Effect of Leveling the Curve of Spee on the Inclination of Mandibular Incisors: A Retrospective Cephalometric Study LID - 10.3290/j.ohpd.b3666501 [doi] FAU - Bernini, Domino A. J. AU - Bernini D FAU - Eliades, Theodore AU - Eliades T FAU - Patcas, Raphael AU - Patcas R FAU - Papageorgiou, Spyridon N. AU - Papageorgiou S FAU - Koretsi, Vasiliki AU - Koretsi V CN - OT - cephalometry OT - Curve of Spee OT - fixed appliances OT - mandibular incisors OT - proclination AB - Purpose: To assess mandibular incisor inclination after leveling the curve of Spee (CoS) in patients treated with fixed appliances. Materials and Methods: This was a retrospective study, which included 80 consecutive patients with a mild CoS treated without extraction but with various biomechanical approaches. The depth of CoS was digitally measured on scanned plaster casts and mandibular incisor inclination was assessed with lateral cephalograms pre- and posttreatment. Patients were treated with 0.018”-slot edgewise fixed appliances and cinched back wires. Data were analyzed using linear regression modeling at 5%. Results: A total of 80 patients (40% female; mean age 13.8 years) were included with mean ANB = 4.4 ± 1.9°, mean SN/ML = 31.7 ± 4.7°, mean L1/ML = 95.0 ± 7.7°, and a mean depth of CoS = 1.1 ± 0.4 mm. The depth of CoS was leveled by -0.85 ± 0.39 mm to a post-treatment median of 0.18 mm (interquartile range = 0.09 to 0.35 mm). A small mandibular incisor proclination was observed through treatment (2.49 ± 9.1°), but this was not associated with the reduction in the depth of CoS (p > 0.05) and no statistically significant modifying effect from the different treatment mechanics was observed. Conclusion: Under the limitations of this study, leveling a mild CoS was not associated with mandibular incisor proclination during fixed-appliance treatment. AID - 3666501