Use of canines in developing an experimental model for alveolar ridge augmentation at mandibular posterior area by distraction osteogenesis

Objective: To establish an animal model in canines for alveolar ridge augmentation at mandibular posterior area by distraction osteogenesis. Methods: All of the mandibular premolars and the first molar were extracted from four adult mongrel canines One month later,box shaped osteotomies of the alveolar bone were carried out and TiNi SMA （shape memory alloy） distractors were buried The bone height was measured before and after the operation,everyday of the first week, and one month after distracton The radiographs were taken on the day of,and1,5 weeks after the operation. Results: The transport segments were lifted up 3 0～4 5 mm immediately after the distractors inserted and the maximum was 7 5～11 5 mm,achieved on 3～5 days after the operation One month after distraction,no bone resorption was found and the radiographs showed the regenerating bone in distraction gap. Conclusion: Canine is a good animal for develeping an experimental model on study of alveolar ridge augmentation at mandibular posterior area by distraction osteogenesis.