Skeletal stability following mandibular advancement and rigid fixation |
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| Authors: | T B Kirkpatrick M G Woods J Q Swift N R Markowitz |
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| Institution: | 1. Department of Orthodontics University of Oklahoma, Oklahoma City, Oklahoma, USA;2. Oral and Maxillofacial Surgery, University of Oklahoma, Oklahoma City, Oklahoma, USA;1. Division of Orthodontics, School of Dentistry, University of Geneva, Geneva, Switzerland;2. Private practice, Thiva, Greece;3. Section of Orthodontics, Department of Dentistry, Aarhus University, Aarhus, Denmark;1. Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada;2. Tanta University, Tanta, Egypt;3. Department of Statistics and Operation Research, University of North Carolina, Chapel Hill, North Carolina;1. Advanced Polytechnic and University Cooperative, CESPU, Institute of Research and Advanced Training in Health Sciences and Technologies (IINFACTS), Gandra, Portugal;2. Department of Clinical Epidemiology, Predictive Medicine and Public Health, Institute of Public Health of the University of Porto (ISPUP), Porto, Portugal;3. Institute for Molecular and Cell Biology (IBMC), Institute of Innovation and Investigation in Health (i3S), University of Porto, Porto, Portugal;1. National Institute of Health Research (NIHR) Academic Clinical Lecturer in orthodontics, School of Dentistry, University of Manchester, Manchester, United Kingdom;2. Honorary senior lecturer/consultant orthodontist, Orthodontic Department, Liverpool University Dental Hospital, Liverpool, United Kingdom;3. Professor, Cochrane Oral Health Group, School of Dentistry, University of Manchester, Manchester, United Kingdom;4. Professor, School of Dentistry, University of Manchester, Manchester, United Kingdom;1. Department of Pedodontics and Orthodontics, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil;2. Private practice, Rio de Janeiro, Brazil |
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| Abstract: | Twenty non-growing subjects underwent sagittal ramus osteotomies and rigid fixation. Cephalograms were analyzed before surgery, immediately after surgery and at least six months following surgery to evaluate skeletal stability. A mean horizontal relapse of 0.42 mm (8%) and a mean vertical increase in lower face height of 0.2 mm were found six months after surgery. Both were statistically insignificant. The mean backward rotation of the mandible of 0.55 degrees found six months after surgery was statistically significant (P less than 0.015), but was considered to be clinically insignificant. The results of this study show that surgical mandibular advancement with rigid fixation is a very reliable and stable procedure. |
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