The skeletal stability after maxillo-mandibular osteotomy with a “physiological positioning strategy” |
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Authors: | Seigo Ohba Noriko Nakao Yuya Nakatani Takako Kawasaki Tokutarou Minamizato Takamitsu Koga Haruka Kohara Noriaki Yoshida Izumi Asahina |
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Institution: | 1. Department of Regenerative Oral Surgery, Nagasaki University Graduate School of Biomedical Sciences;2. Division of Dentistry and Oral Surgery, Department of Sensory and Locomotor Medicine, Faculty of Medical Sciences, University of Fukui;3. Department of Special Care Dentistry, Nagasaki University Graduate School of Biomedical Sciences;4. Department of Rehabilitation Medicine, Fujita Health University School of Medicine;5. Department of Orthodontics and Dentofacial Orthopedics, Nagasaki University Graduate School of Biomedical Sciences |
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Abstract: | The aim of this study was to estimate skeletal and dental stability after maxillomandibular osteotomy with physiological positioning. Ten patients (7 men and 3 women) with skeletal mandibular prognathism were treated by conventional Le Fort I osteotomy for the maxilla and unfixed short lingual osteotomy for the mandible together with physiological positioning. We used cephalometric analysis to evaluate the skeletal and dental stability preoperatively, immediately after maxillomandibular osteotomy, and more than 1 year later. The immediately postoperative measurements for the SNA and the SN-palatal planes were 0.15o (p = 0.67) and 1.0 o (p = 0.17), respectively. The positions of the anterior nasal spine, posterior nasal spine, and A point showed minimal changes 1 year postoperatively. The postoperative difference for SNB was 0.76 o (p = 0.04). Dental stability was apparent postoperatively. We conclude that reliable stability of both the maxilla and the mandible was achieved after maxillomandibular osteotomy with physiological positioning in patients with mandibular prognathism. |
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Keywords: | physiological positioning strategy (PPS) short lingual osteotomy (SLO) maxillo-mandibular osteotomy jaw exercise maxillo-mandibular fixation (MMF) |
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