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Longitudinal Results of Mandibular Distraction Osteogenesis in Hemifacial Microsomia

Huisinga-Fischer, Clara E. DDS*†; Vaandrager, J. Michiel MD; Prahl-Andersen, Birte DDS, PhD*†

Journal of Craniofacial Surgery: November 2003 - Volume 14 - Issue 6 - p 924-933
Scientific Foundation

The aim of this study was to evaluate mandibular distraction therapy by three-dimensional (3-D) computed tomography (CT) imaging so as to be able to improve the treatment results. The study group consisted of eight children (3 male and 5 female) with hemifacial microsomia. For each child, CT scans of the head were available (Pro Speed S Fast Spiral scanner; General Electric). Longitudinal measurements of the mandible, bony and soft tissue 3-D reconstructions, and masticatory muscles were demonstrated. Three-dimensional CT scans provide important data concerning the results of mandibular distraction therapy and should be used in treatment evaluation. In some patients and for some muscles only, a small increase in the volume of the affected side of the masticatory muscles in comparison to the normal side was found 3 years after mandibular distraction. In around 50% of the cases, there seems to be a relapse occurring 1 year after distraction osteogenesis, and this relapse has a progressive character when seen 3 years after distraction osteogenesis in comparison to 15 weeks after distraction osteogenesis.

Amsterdam, The Netherlands

From the *Department of Orthodontics, Academic Center for Dentistry, Amsterdam, and Department of Plastic and Reconstructive Surgery, Craniofacial Center of the Erasmus Medical Center, Rotterdam, The Netherlands.

Address correspondence to Dr Huisinga-Fischer, Department of Orthodontics, Craniofacial Center of the Erasmus Medical Center, Dr Molewaterplein 60, Rotterdam, 3015 GJ Rotterdam, The Netherlands; e-mail:

©2003Muntaz B. Habal, MD