T. Hosseinzadeh Nik
Professor, Dental research center, Dentistry research institute, Tehran University of Medical Sciences,
Tehran, Iran And Department of Orthodontics, Faculty of Dentistry, Tehran University of Medical
Sciences, Tehran, Iran
E. Sadat Emdadian Razavi
Postgraduate student, Orthodontic department, Dental school, Tehran University of Medical Sciences
A. Modarresi
Postgraduate student, Oral and maxillofacial surgery department, Dental school, Azad University of
Medical Sciences
M. Mollaei
Postgraduate student, Orthodontic department, Dental school, Azad University of Medical Sciences
Abstract
Introduction A possible treatment option for non-growing patients with vertical maxillary excess (VME), is superior repositioning of maxilla with or without mandibular surgery. After maxillary impaction, mandible rotates around a center. A common assumption at the time of cephalometric prediction, is taking condyle as an unchangeable center of rotation. Any error in determination of center of mandibular autorotation (CMA) may lead to improper jaw positioning and unaesthetic results. Materials and methods: In this study, before and after cephalometric radiographs from fourteen orthognathic patients with maxillary impaction were evaluated. Results showed that center of mandibular autorotation are not similar in different patients, partly because of individualized craniofacial morphology. Therefore, precise determination of center of mandibular autorotation is necessary for obtaining ideal results.
Key words:
Le Fort I, Superior repositioning, mandibular autorotation, center of rotation