文章介绍了122只活根保存5年的经验,注意了手术改良和病例选择,结果满意。手术指征:(1)无牙髓病变。死髓牙、深龋及疑有牙髓或尖周病变者,不宜作活根保存。病变牙髓不能附着于粘骨膜瓣,常导致牙根丧失。(2)牙周状况良好。保存的活根应具有足够的支持骨和软组织。牙槽骨中度水平 The article introduced 122 live 5 years of experience in preservation, pay attention to the surgical improvement and case selection, the results are satisfactory. Surgical indications: (1) no pulp lesions. Dead tooth, deep caries and suspected dental pulp or periapical lesions should not be saved for living roots. Lesions of the pulp can not be attached to the mucoperiosteal flap, often leading to loss of roots. (2) periodontal condition is good. The preserved living root should have sufficient support for bone and soft tissue. Alveolar bone moderate level