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http://dx.doi.org/10.5125/jkaoms.2011.37.4.264

A comparative study on the change of postoperative facial hard tissue profile after maxillary rotational surgery  

Kim, Uk-Kyu (Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University)
Lee, Sung-Tak (Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University)
Kim, Tae-Hoon (Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University)
Song, Jae-Min (Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University)
Hwang, Dae-Seok (Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University)
Chung, In-Kyo (Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University)
Publication Information
Journal of the Korean Association of Oral and Maxillofacial Surgeons / v.37, no.4, 2011 , pp. 264-271 More about this Journal
Abstract
Purpose: This study evaluated retrospectively the postsurgical facial hard tissue profile of a Le Fort I osteotomy with/without posterior impaction and rigid internal fixation to correct mandibular prognathism. After observing a difference between the two groups, this measurement was used to prepare a treatment plan for 2-jaw surgery. Patients and Methods: Thirty patients who had undergone orthognathic surgery in Pusan National University Dental Hospital were enrolled in this study. Fifteen patients were treated using a Le Fort I osteotomy with posterior impaction and mandibular setback bilateral sagittal split ramus osteotomy, and the other fifteen patients were treated without posterior impaction. The preoperative (T0), immediate postoperative (T1) and six-month follow-up period (T2) cephalograms were taken and difference between T1-T0 and T2-T2 was analyzed. Results: Both groups was FH-ABp, SNB and ANB showed significant changes in the measurement, whereas only the posterior impaction group showed a change in the SN-U1, occlusal plane, posterior facial height, surgical movement difference from the L1 and B-point. There was no significant statistical change between the immediate postoperative (T1) and six-month follow-up (T2) hard tissue analysis in the two groups. Conclusion: A Le Fort I osteotomy with posterior impaction is considerable for patients with a flat occlusal plane angle, large posterior facial height, prominent B-point, pogonion and labioversed incisal inclination if the indications are well chosen.
Keywords
Hard tissue; Rotational orthognathic surgery; Posterior impaction;
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