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  • Title: [Mid-premaxillary sutural distraction osteogenesis for repair of alveolus cleft: an experimental study in dogs].
    Author: Liang LM, Liu CM, Song RY, Hou M, Ma X.
    Journal: Zhonghua Zheng Xing Wai Ke Za Zhi; 2004 Mar; 20(2):136-8. PubMed ID: 15334940.
    Abstract:
    OBJECTIVE: To explore a new technique for repair of alveolar cleft by sutural distraction osteogenesis. METHODS: Nine 8-weeks mongrel dogs were used in this study, three being in the control group, six in the experimental group. Alveolar cleft model was created surgically in all animals. Two weeks later, a U-shaped distractor made of Ni-Ti memory alloy wire was insterted into the premaxilla to distract the mid-premaxillary suture. When the premaxilla of the cleft side approached the ipsilateral maxilla, periosteoplasty of the alveolar cleft was performed. The distractor was removed at two weeks after periosteoplasty. The results were evaluated clinically, radiographically, morphologically and histologically. RESULTS: The cleft model in dogs was stable and similar to the human alveolar cleft. In experimental dogs, the premaxilla was moved gradually toward the maxilla so that the cleft was closed. The distracted mid-premaxillary suture showed a gradually widened traingle, with its tip being posterior. The density of the distracted traingle suture was increased gradually. Bony repair was achieved completely at the cleft three months post-periosteoplasy. The morphology of the mid-premaxillary suture was restored. CONCLUSION: The alveolar cleft could be repaired by the technique of mid-premaxilla suture distraction.
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