结论：超声骨刀应用于根尖囊肿刮治术可获得很好的疗效。
Conclution: Piezosurgery is a ideal therapeutic method for radicular cyst curettage.
方法：选取120例根尖周刮治术的患者随机分为2组：实验组65例，术后使用B IO-OSS骨粉充填骨腔；
METHODS:120 periapical curettage cases were divided into two groups randomly. 65 cases received therapy of the BIO-OSS bone dust implant.
方法：对52例慢性牙周炎患者的1453颗牙进行龈下刮治及根面平整术，随访3个月。
METHODS: 1453 teeth of 52 patients with chronic periodontitis were given scaling and root-planing procedures.
方法：对52例慢性牙周炎患者的1453颗牙进行龈下刮治及根面平整术，随访3个月。
METHODS: 1453 teeth of 52 patients with chronic periodontitis were given scaling and root-planing procedures.
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