Effect of maxillary osteotomy on subsequent craniofacial growth in adolescent monkeys |
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| Authors: | R Nanda J Sugawara R G Topazian |
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| Affiliation: | 1. College of Medicine and Dentistry, James Cook University, Queensland, Australia;2. Oral Health Services Tasmania, Tasmania, Australia;3. Private Practice, Queensland, Australia;4. University of South Australia Cancer Research Institute, University of South Australia, South Australia, Australia;5. Australian Institute of Tropical Health and Medicine, James Cook University, Queensland, Australia;1. Department of Orthodontics, Hebrew University-Hadassah School of Dental Medicine, Jerusalem, Israel;2. Department of Orthodontics, University of Campania Luigi Vanvitelli, Naples, Italy;3. Division of Orthodontics, Department of Dentistry, University of Alberta, Edmonton, Canada;4. Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Naples, Italy;1. Professor, Department of Periodontology, School of Dentistry; Laboratoire Biologie Santé et Nanoscience EA42503, Université de Montpellier, Montpellier, France;2. Professor, Department of Orthodontics, Université de Montpellier, Montpellier, France;3. Doctor, Laboratoire Biologie, Santé et Nanoscience EA42503, Université de Montpellier, Montpellier, France;4. Professor, Department of Orthodontics, Université de Montpellier, Montpellier, France;1. Department of Oral Health Sciences-Orthodontics, KU Leuven and Dentistry, University Hospitals Leuven, Leuven, Belgium;2. OMFS IMPATH, Department of Imaging & Pathology, Faculty of Medicine, University Leuven & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium;3. Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden;1. Department of Orthodontics and Craniofacial Development Biology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Japan;2. Department of Orthodontics, Division of Oral Health and Development, Hiroshima University Hospital, Japan |
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| Abstract: | LeFort I osteotomy was performed on seven adolescent Macaca fascicularis monkeys to study its effect on the subsequent dentocraniofacial growth. Eight adolescent monkeys were used as controls. Tantalum implants were inserted at predetermined areas in certain craniofacial bones of all monkeys. For stereometric cephalometry, implants were placed in both the left and right sides of the facial bones. Lateral cephalometric radiographs of all monkeys were taken prior to and immediately after metallic implant placement, immediately after maxillary osteotomy, and thereafter every 4 weeks during the postsurgical period. At least two cephalograms were taken on each occasion, one with the teeth in occlusion and the other with mouth wide open. The latter was used to view the mandibular condyle adequately. These findings suggest that the maxillary osteotomy did disturb the vertical growth of the maxilla at the PNS and retarded the horizontal growth at the premaxilla. The anterior growth of the maxilla and mandible and the vertical growth of the face were substantially reduced. The most interesting finding was also a reduction of the mandibular growth in all of its dimensions. The rate and the amount of reduced anterior mandibular growth were found to be coordinated with the anterior maxillary growth which resulted in all animals showing a normal overjet, overbite, and occlusion throughout the postsurgical observation period. |
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