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  • Title: [Mandibular distraction combined with orthognathic techniques for the correction of adult hemifacial microsomia].
    Author: Shi L, Gui L, Yin L, Tang XJ, Yin HY, Yang B, Yang RK, Zhang ZY.
    Journal: Zhonghua Zheng Xing Wai Ke Za Zhi; 2013 May; 29(3):170-4. PubMed ID: 25069340.
    Abstract:
    OBJECTIVE: To study the combination of Mandibular distraction and orthognathic techniques for the reconstruction of adult hemifacial microsomia. METHODS: The three-dimensional CT reconstruction data was used with Mimics for preoperation design. The osteotomy location, distraction vector, distraction distance were decided before operation with a surgical guider. At the first stage, internal distractor was implanted after ostetomy through an extra-oral approach. The distraction begun 5-7 days after operation with a frequency of 1 mm/day. After distraction, the distractor was maintained for 3-6 months. At the second stage, the distractor was removed. Le Fort I osteotomy was performed in order to correct the cross-bite and improve the facial contour. Usually, bone graft was inserted into the gap after Le Fort I osteotomy. The genioplasty was also performed if necessary. RESULTS: 9 cases of adult hemifacial microsomia with severe mandibular deviation were treated. The facial asymmetry were improved greatly. 1 patient suffered an wound infection in the maxillary region after Le Fort I osteotomy and healed uneventfully with wound irrigation. CONCLUSIONS: Mandibular distraction combined with orthognathic surgery is an effective procedure for adult hemifacial microsomia with complicated mandibular hypoplasia.
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