By using distraction osteogenesis technique, 3 cases of mandibular hypoplasia were treat ed by home made and German made jaw distractors: including one patient suffered from bilateral ankylosis of temporo mandibular joint and 2 patients from deficiency of mandible. The duration of distraction osteogenesis was one month. The bone distractor was removed 3 months after operation. Satisfactory results were obtained in all 3 cases. Distraction osteogenesis can successfully be used in mandibular functional reconstruction and has much more advantages than traditional technique.
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