[Retracted] Location and Effect of Bone Cement in Percutaneous Vertebroplasty for Osteoporotic Vertebral Compression Fractures

Table 1

Comparison of preoperative and postoperative VAS scores between two groups ().

Group		Before surgery	3 days after surgery	1 month after surgery	3 months after surgery	6 months after surgery
Unilateral group	37
Bilateral group	23

; comparison between groups: .