Objective:To compare the clinical outcomes of Jack vertebral dilator-kyphoplasty (DKP)and balloon kyphoplasty(BKP)in treatment of osteoporotic vertebral compression fractures (OVCF). Methods:A retrospective study was conducted about 56 single OVCF cases from January 2010 to December 2012. Thirty-three cases were treated with DKP,while other 23 cases were treated with BKP procedures.The operating time,bleeding volume,cement injected volume were recorded during operation. The patients’ visual analogue scales (VAS)score and Oswestry disability index (ODI)score were also evaluated. The distribution of cement,the restoration of vertebral height and Cobb angle were also observed post-operation. Results:There were no significant differences in operating time,bleeding volume and cement injected volume between two groups (P > 0.05). The vertebral height,Cobb angle,VAS and ODI scores were significantly improved by those two operations (P < 0.05). The height of the anterior vertebrae and Cobb angle in DKP groups were restored more significantly than that of BKP group (P < 0.05). Cement leakages happened in one case (3.0%)in DKP group and in 5 cases (21.7%)in BKP group. Conclusion:DKP and BKP were both effective and safe for the treatment of OVCF. The height of anterior vertebrae and Cobb angle in DKP group were restored significantly than those in BKP groups,and there is lower cement leakage rate in DKP than that of BKP.