Long-term skeletal stability in the treatment of mandibular prognathism with a physiological positioning strategy |
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Authors: | K Miura S Yamaoka K Arizono S Ohba T Koga T Kawasaki N Yoshida I Asahina |
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Affiliation: | 1. Department of Regenerative Oral Surgery, Nagasaki University Graduate School of Biomedical Sciences, Japan;2. Department of Orthodontics and Dentofacial Orthopedics, Nagasaki University Graduate School of Biomedical Sciences, Japan |
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Abstract: | Our aim was to evaluate the long-term skeletal stability of the mandible in 21 patients after orthognathic surgery with physiological positioning. The measurement points SNB, B point (X, Y), Pog (X, Y), and the angle of the ramus were measured on cephalometric photographs to assess skeletal stability preoperatively, immediately after operation, and one and two years postoperatively. In addition, we evaluated the clinical symptoms of disorders of the temporomandibular joint (TMJ). The analysis of the cephalometric photographs showed that SNB, B point X, and Pog X showed no significant differences among the postoperative time points. On the other hand, B point Y and Pog Y showed no significant differences throughout the study period. We compared the angle of the ramus before operation and two years postoperatively, and no significant difference was found. In addition, no cases showed any pathological symptoms of disorders of the TMJ two years postoperatively. The long-term stability after orthognathic surgery with physiological positioning was confirmed, and it seems to be a reliable orthognathic treatment in patients with mandibular prognathism. |
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Keywords: | Corresponding author at: Department of Regenerative Oral Surgery Nagasaki University Graduate School of Biomedical Sciences 1-7-1 Sakamoto Nagasaki 852-8588 Japan Orthognathic surgery Physiological positioning strategy Long-term stability SSRO Mandible |
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