Purpose: To investigate transverse dimensional changes of dental arches in surgical skeletal Class III patients with and without presurgical orthodontics. Materials and Methods: Thirty-six patients with skeletal Class III were included and grouped into those with or without presurgical orthodontics. Eighteen patients (mean age, 22.3 ± 3.8 years) with presurgical orthodontics (mean presurgical orthodontic treatment time, 176.3 ± 38.3 days) were in the orthodontics-first (OF) group; the other 18 patients (mean age, 23.3 ± 4.2 years) without presurgical orthodontics were in the surgery-first (SF) group. The posteroanterior cephalograms initially, before surgery, immediately after surgery, and 1 year after surgery were traced and analyzed. The inclination change of canines and molars was measured to interpret the changes of transverse dimension in both dental arches. Paired and unpaired t tests were performed to test intra- and intergroup differences (P < .05). Results: Dental changes in transverse planes demonstrated a similar trend in both groups. The maxillary canines were buccally tilted (SF vs OF group, 1.7° vs 1.9°), the maxillary molars were lingually tilted (SF group vs OF group, -4.7° vs -1.0°), the mandibular canines were lingually tilted (SF group vs OF group, 2.9° vs 2.8°), and the mandibular molars were buccally tilted (SF group vs OF group, -6.1° vs -5.4°). Conclusion: The magnitude and trend of transverse dental changes in patients with surgical skeletal Class III were similar whether receiving presurgical orthodontics or not.
ASJC Scopus subject areas
- Oral Surgery