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Intraoral distraction osteogenesis to lengthen the ascending ramus. Experience with seven patients
Johan Jansma1, Michiel W J Bierman, Alfred G Becking
1Department of Oral and Maxillofacial Surgery, University Hospital Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands. j.jansma@kchir.azg.nl
Abstract:
Seven children with facial asymmetry, mean age 12 years (range 11-14.5) were treated by intraoral distraction osteogenesis to lengthen the hypoplastic ramus. We achieved a mean increase in length of the ramus of 13mm (range 10-16). In only one patient did we achieve a posterior open bite on the distraction side. All patients ended with a symmetrical chin. It was helpful to place an orthodontic bite block on the opposite side either preoperatively or postoperatively to cant the plane of occlusion. The duration of follow-up was too short to allow conclusions to be drawn about the future requirement for bimaxillary osteotomies.
