Abstract:[Objective] To investigate effect of bone-filling mesh container (BFMC) in percutaneous kyphoplasty (PKP) on bilateral bonecement injection and leakage for osteoporotic compression fracture (OVCF). [Methods] A retrospective analysis was performed on 100 pa-tients who received single-segment bilateral PKP in our department from 2022.10 to 2023.7. According to doctor-patient communication, 50of them received BFMC-PKP (the BFMC group), while other 50 received routine bilateral PKP (PKP group). Early clinical results with imag-ing data were compared. [Results] The bone cement injection volume in the BFMC side group was significantly higher than that in PKP side inthe BFMC group [(4.8±0.8) ml vs (2.6±0.6) ml, P<0.001], while the amount of bone cement injected in the BFMC side was also significantlyhigher than that in PKP group [(4.8±0.8) ml vs (4.1±0.9) ml, P=0.030]. The VAS scores significantly declined in both groups 3 days postopera-tively compared with that preoperatively (P<0.05), whereas which was not significantly different between the two groups at any time points ac-cordingly (P>0.05). Bone cement leakage rate on BFMC side was significantly lower than that in PKP side in the BFMC group [case (%), 5(10.0) vs 20 (40.0), P<0.001], and which on BFMC side in the BFMC group was significantly lower than that in PKP group [case (%), 5 (10.0) vs14 (28.0), P=0.020] . Most of the bone cement leakage occurred in the upper endplate, lateral and anterior sides. The anterior vertebral heightof injured vertebrae increased significantly (P<0.05), while the local kyphotic angle decreased significantly in both groups postoperatively com-pared with those preoperatively (P<0.05). [Conclusion] In PKP for OVCF, BFMC can significantly reduce the bone cement leakage on the ipsi-lateralside,butleadtoadecreaseintheamountofbonecementinjectionandanincreaseintheleakagerateonthecontralateralside.