Abstract:[Objective] To compare the clinical outcomes of percutaneous curved vertebroplasty (PCVP) with or without manual reduc-tion for osteoporotic vertebral compression fracture non-union (OVCF-NU). [Methods] A total of 90 patients with OVCF-NU admitted toour hospital from June 2020 to September 2022 were divided into two groups by random number table method. Of them, 45 patients receivedPCVP combined with manual reduction (the reduction group), while other 45 patients received PCVP treatment alone without manual reduc-tion(the non-reduction group). The perioperative period, follow-up and imaging data were compared between the two groups. [Results] Thereduction group consumed significantly longer operative time [(40.6±6.7) min vs (36.5±5.6) min, P=0.002], associated with significantlygreater intraoperative X-ray exposure times [(22.0±3.0) vs (20.3±2.5), P=0.004] than the non-reduction group, despite of that there were nosignificant differences in bone cement injection amount, effective bone cement diffusion ratio, bone cement leakage, postoperative ambula-tion time and hospital stay between the two groups (P>0.05). As time went during the follow-up period lasted for (16.0±2.0) months, the VASscores and ODI score in both groups significantly decreased (P<0.05). At the last follow-up, the reduction group was significantly better thanthe non-reduction group in term of ODI score [(13.3±3.4) vs (15.0±4.0), P=0.035]. With respect of imaging, the anterior vertebra height ratio,posterior vertebra height ratio and local kyphotic Cobb angle significantly improved in both groups 3 days after surgery and at the last followupcompared with those preoperatively (P<0.05). The reduction group proved significantly superior to the non-reduction group in terms ofthe anterior vertebral height ratio [(69.5±8.4) vs (65.4±8.2), P=0.024; (68.0±8.0) vs (64.5±7.8), P=0.042], the posterior vertebral height ratio [(84.5±4.0) vs (82.0±3.6), P=0.003; (82.7±4.2) vs (80.2±3.8), P=0.005] at 3 days postoperatively and the last follow-up, as well as the localkyphotic Cobb angle [(11.2±1.8)° vs (12.7±3.0)°, P=0.006] at the last follow-up. [Conclusion] Manual reduction combined with PCVP inthe treatment of OVCF-NU is safe and effective, which can quickly relieve the pain of patients and effectively restore the height and correctthe kyphosis of the injured vertebra.