METHODS:120 periapical curettage cases were divided into two groups randomly. 65 cases received therapy of the BIO-OSS bone dust implant.
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：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；
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