CONCLUSION: the no tooth area and the first premolar area of mandible in sheep is a good experimental animal model for alveolar ridge augmentation by distraction osteogenesis.
结论：山羊下颌无牙区及下颌第一前磨牙区可作为牵张成骨增高牙槽嵴新的实验动物模型。
Conclusion By doing alveolar ridge augmentation, the indication of dental implant can be greatly extended, its course of treatment is shortened and its success rate is increased.
结论运用牙槽骨扩展术大大地扩大了人工种植牙的适应证、缩短疗程和提高成功率。
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