Longitudinal results of mandibular distraction osteogenesis in hemifacial microsomia.
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.
Department of Orthodontics, Academic Center for Dentistry, Amsterdam, The Netherlands. c.fischer@acta.nl
Clara E
CE
Huisinga-Fischer
J Michiel
JM
Vaandrager
Birte
B
Prahl-Andersen
D000293:Adolescent; D002508:Cephalometry; D002648:Child; D005146:Facial Asymmetry / Q000473:pathology / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D021621:Imaging, Three-Dimensional; D008137:Longitudinal Studies; D008297:Male; D008334:Mandible / Q000254:growth & development / Q000473:pathology / Q000601:surgery*; D008406:Masseter Muscle / Q000473:pathology; D019857:Osteogenesis, Distraction / Q000295:instrumentation / Q000379:methods; D011626:Pterygoid Muscles / Q000473:pathology; D012008:Recurrence; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome