Abstract: Objective To investigate the clinical efficacy of bone filling mesh bag combined with pedicle anchoring for the treatment of Stage III reducible Kummell disease.Method The 35 paients with Stage Ⅲ  reducible Kummell disease were treated with bone filling mesh bag combined with pedicle anchoring from January 2018 to December 2022.The operation Time,intraoperative blood lose,bone cement injection volume and surgical complications were recorded.The VAS score,ODI value,kyphosis Cobb angle and midline height of the injured vertebral were compared at preoperative,postoperative 1 day and last follow-up.Results  All patients were followed up for 12-24months[(15±3.5)months].Operation time was 35-63min[(45±5.8)min],intraoperative blood loss was 10-35ml[(20±5)ml],bone cement injection volume was 4.5-7.8ml[(5.5±1.8)ml].There were 4 cases of bone cement leakage,there were 1 case of intervertebral leakage, 2 cases of lateral leakage，1 case of anterior leakage and no patient with intracanal leakage.All bone cement leakage did not lead to clinical symptoms, bone cement poisoning and pulmonary embolism. No cement mass slip. All patients were followed up for 12 to 24 months[(15±3.5)months].VAS scores and Oswestry Disability Index (ODI) values were significantly lower on the first day after surgery than before surgery, with statistical significance (P<0.05).The 3-month follow-up was slightly higher than that on the first day after surgery, and the difference was not statistically significant(P>0.05).The midline height and Cobb Angle of the injured vertebra were measured by imaging. The height of the injured vertebra recovered significantly on the first day after operation, and the Cobb Angle decreased significantly, the difference was statistically significant(P<0.05).The midline height of the injured vertebrae decreased and the Cobb Angle increased slightly at 3 months after the operation, but the difference was not statistically significant(P>0.05).Conclusion In the the treatment of Stage III reducible Kummell disease，Bone filling mesh bag combined with Pedicle anchoring have good clinical efficacy,which can significantly reduce the pain of patients,relieve clinical symptoms,improve spinal function,improve quality of life,and reduce the incidence of bone cement leakage and slippage.

Key words: Kummell disease with Stage Ⅲ;recoverability;bone filling mesh bag;pedicle anchoring, minimally invasive