Abstract: Objective: To compare the clinical effects between Jack dilator kyphoplasty(DKP) and balloon kyphoplasty(BKP) in the treatment of osteoporotic vertebral compression fractures.Methods: Fifty-two patients with osteoporotic vertebral compression fractures were divided into the DKP group(25 cases) and BKP group(27 cases) according to the treatment method.The operation effect between two groups was compared.Results: The differences of the operation time,peroperative bleeding and bone cement injection volume between two groups were not statistically significant(P>0.05).Compared with before treatment,the height of fanterior edge and middle part in two groups increased after operation and at last follow-up,and the Cobb angle in two groups after operation decreased compared with before operation(P<0.05 to P<0.01).The height of fanterior edge and Cobb angle in DKP group at last follow-up were higher and lower than that in BKP group,respectively(P<0.05).Compared with before operation,the scores of VAS and ODI in two groups decreased after operation and at last follow-up(P<0.05 to P<0.01),and the difference of which between two groups was not statistically significant(P>0.05).The bone cement leakage rate in DKP group was lower than that in BKP group(P<0.05).Conclusions: The effects of DKP and BKP in the treatment of osteoporotic vertebral compression fractures are similar,and the effect of DKP on the recovery of the convex Cobb angle and anterior height of the vertebral body is better than that of the BKP.