牙﹑微型种植体支抗联合支抗牵张成骨治疗齿槽突裂的动物实验研究

目的:建立牙、微型种植体支抗联合支抗牵张成骨治疗齿槽突裂的动物模型,评估其治疗效果。方法:成年杂种犬实验组6只,对照组2只。首先形成齿槽突裂外科模型,2周后手术截骨形成一含牙的骨运送盘,在骨运送盘上植入微型种植体支抗,一周后开始牵引。牵张完成后1,2,3月各处死动物2只,对照组术后1月处死。取标本作大体,放射学,及组织学检查。结果:齿槽突裂隙完全关闭,牵张区为丰富的新骨。结论:牙、微型种植体支抗联合支抗牵张成骨能够很好的关闭犬的齿槽突裂隙。

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.