Fig. 9
A 70-year-old female with single-level L1 OVCF treated by unilateral PKP with traditional bone cement delivery device. A, B, Preoperative anteroposterior and lateral radiographs showed a L1 fracture. C, D, one week after operation, the asymmetrical distribution of bone cement. E, F, 12 months after operation: the bone cement remains asymmetrically distributed. The anterior height of the injured vertebra has been diminished, and the kyphotic angle aggravated