Computerized cephalometric evaluation of orthognathic surgical precision and stability in relation to maxillary superior repositioning combined with mandibular advancement or setback

摘要: Abstract Purpose A computerized, cephalometric, orthognathic surgical program (TIOPS) was applied in simulation, treatment planning, and postoperatively to assess precision stability of bimaxillary surgery. Patients Methods Forty consecutive patients with dentofacial deformities requiring surgery maxillary superior repositioning combined mandibular advancement or setback were included. All managed rigid internal fixation (RIF) the maxilla mandible without maxillomandibular (MMF). Preoperative cephalograms analyzed plans produced by computerized simulation. Planned, 5-week postoperative 1-year cephalometric positions compared. Results In group, anterior placed too far superiorly, an inaccuracy 0.4 mm. The posterior planned positions. lower part ramus anteriorly, 2.0 However, condyles accurately placed. superiorly posteriorly, a vertical sagittal 1.0 mm 0.7 mm, respectively. position 1.9 anteriorly 0.9 statistical analysis data showed that had moved 0.3 posteriorly group incisors 0.8 superiorly. No other significant positional changes found. 0.5 seen ramus. Conclusion TIOPS is useful prediction, evaluation stability. simulated plan can be transferred model finally procedures. results show this technique yields acceptable