Abstract:[Objective] To compare the clinical outcomes of modified unilateral percutaneous vertebroplasty (PVP) versus bilateral PVP for osteoporotic vertebral compression fracture (OVCF) . [Methods] From June 2020 to December 2020, 86 patients underwent PVP for lumbar OVCF. According to doctor-patient communication, 51 patients received unilateral puncture via posterior upper margin of the vertebral body (unilateral group), while the other 35 patients received conventional bilateral puncture (bilateral group) . The perioperative period, follow-up and imaging consequences of the two groups were compared. [Results] All patients in both groups had operation complet- ed successfully, with bone cement leakage in 18 cases of the unilateral group, whereas 13 cases in bilateral group, without serious complica- tions. The unilateral group proved significantly superior to the bilateral group in terms of number of X- ray exposures and hospitalization costs (P<0.05) , however, the former consumed significantly longer operative time than the latter (P<0.05) , and there were no significant dif- ferences in bone cement injection amount, bone cement distribution, bone cement leakage, postoperative ambulation time, hospital stay and early VAS score between the two groups (P>0.05) . During the follow-up lasted for 13~24 months, with an average of (15.8±2.1) months, the VAS scores and ODI decreased significantly (P<0.05) , while JOA score increased significantly in both groups (P<0.05) , and there were no significant differences in VAS, ODI and JOA scores between the two groups at any corresponding time points (P>0.05) . Radiographical- ly, the anterior height of injured vertebrae increased significantly (P<0.05) , whereas the local kyphotic Cobb angle decreased significantly in both groups postoperatively compared with those preoperatively (P<0.05) , which proved not statistically significant between the two groups at any corresponding time points (P>0.05) . [Conclusion] This modified unilateral puncture in PVP does achieve satisfactory clini- cal outcomes for lumbar OVCF, with advantages of optimizing surgical procedure and saving costs, despite of certain learning curve.