Distraction Osteogenesis for Repair of Alveolar Cleft by Tooth and Micro-Implant Anchorage-Borne Intraoral Distractor : an Experimental Study

Objective:To establish an animal model for repair of alveolar cleft with distraction osteogenesis by tooth and MIA-borne intraoral distractor. Methods:Eight adult mongrel dogs were divided into two groups: the control (n=2) and the experimental groups. Alveolar bone resection was made surgically at first. After 2 weeks, the tooth-bone complex transport disc was formed by osteotomy, and MIA was implanted into it. The gradual distraction was started After 1 week latency. The dogs were killed at 1 month, 2 months, 3 months after completion of distraction(1 month in control group). The samples were evaluated by clinical examination, x-ray, histology observation. Result:The alveolar bone resection had disappeared, and the distraction zone had formed new bone. Conclusion:Alveolar cleft can be repaired and achieved functional reconstraction under DO by tooth and MIA-borne intraoral distractor.