Head posture and pharyngeal airway volume changes after bimaxillary surgery for mandibular prognathism |
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| Institution: | 1. Department of Orthodontics, Kangdong Sacred Heart Hospital, Hallym University Medical Center, Gil-dong 445, Gangdong-gu, Seoul 134-701, Republic of Korea;2. Graduate School of Hallym University, Seoul, Republic of Korea;1. Department of Oral and Maxillofacial Plastic Surgery (Head: Alexander C. Kuebler, M.D., D.M.D., Ph.D.), University of Wuerzburg, Pleicherwall 2, D-97070 Wuerzburg, Germany;2. Department of Molecular and Cellular Sport Medicine (Head: Wilhelm Bloch, M.D., Ph.D.), German Sport University, Am Sportpark Muengersdorf 6, D-50933 Cologne, Germany;3. Medicine & Aesthetics (Head: Christoph Pautke, M.D., D.M.D., Ph.D.; Bettina Hohlweg-Majert, M.D., D.M.D., Ph.D.), Clinic for Oral, Maxillofacial and Plastic Surgery, Lenbachplatz 2a, D-80333 Munich, Germany;1. Department of Head & Neck/Maxillofacial Surgery, Greek Anticancer Institute, Saint Savvas Hospital, Athens, Greece;2. Department of Oral and Maxillofacial Surgery, University College London, University of London, United Kingdom;3. Regional Maxillofacial Unit, Aintree University Hospital, Liverpool, United Kingdom;4. Faculty of Medicine, Department of Surgery, National and Kapodistrian University of Athens, Greece;1. Department of Plastic and Reconstructive Surgery, Keio University, Tokyo, Japan;2. Design Faculty, Tokyo University of Technology, Tokyo, Japan;3. Department of Pediatrics, Tokyo University, Tokyo, Japan;1. Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Republic of Korea;2. The Airway Mucus Institute, Yonsei University College of Medicine, Seoul, Republic of Korea;3. Department of Otorhinolaryngology, Kang-Dong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Republic of Korea;4. Department of Otorhinolaryngology, Ajou University College of Medicine, Suwon, Republic of Korea;1. Private practice, Woodridge, Va;2. Private practice, Omaha, Neb;3. Assistant professor and program director, Department of Orthodontics, University of Oklahoma, Oklahoma City, Okla;4. Professor and chair, Department of Orthodontics, University of Oklahoma, Oklahoma City, Okla;5. Professor and chair, Department of Oral and Maxillofacial Surgery, University of Oklahoma, Oklahoma City, Okla;6. Biostatistician, Department of Biostatistics and Epidemiology, University of Oklahoma, Oklahoma City, Okla;7. Assistant professor, Department of Biostatistics and Epidemiology, University of Oklahoma, Oklahoma City, Okla;1. Dept of Orthodontics, Army Dental Centre (Research & Referral), New Delhi, India;2. Dept of Orthodontics, Armed Forces Medical College (Pune), India;3. Dept of Orthodontics, ESIC Dental College & Hospital, Sector-15 Rohini, New Delhi, India;4. Dept of Orthodontics, CDER, AIIMS, New Delhi, India |
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| Abstract: | PurposeThe purpose of this study was to evaluate head posture and the pharyngeal airway volume changes using 3D imaging after bimaxillary surgery in mandibular prognathism patients by null hypothesis.Materials and methodsCone-beam computed tomography (CBCT) scans were obtained for 25 mandibular prognathism patients before bimaxillary surgery (T1) and 6 months after surgery (T2). The head posture of each patient was assessed by measuring cranio-cervical angle on a midsagittal plane passing through the anterior nasal spine at T1 and T2. Additionally, the volume of each subject's pharyngeal airway was measured using InVivoDental 3D imaging software.ResultsThe cranio-cervical angle increased significantly 6 months after bimaxillary surgery (p < 0.01). The total volume of the pharyngeal airway slightly decreased (p > 0.05) at the same timepoints, while naso- and oro-pharyngeal airway volume decreased significantly (p < 0.05, p < 0.05). There was significant relationship between the changes of head posture and those of total airway volume (p < 0.05).ConclusionThe null hypothesis was rejected. Bimaxillary surgery resulted in significant head flexion and a slight decrease in total pharyngeal airway volume. |
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| Keywords: | Orthognathic surgery CBCT Head posture Pharyngeal airway |
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