Fig. 1

Percutaneous Curved Vertebroplasty Device

a, Standard transpedicular approach; b, insert curved injection cannula via straight trocar into the contralateral hemivertebra body; c, orientation of the device avoids cannula access in the wrong position; d, e, The veutro design of the side opening near the tip of the curved cannula prevents distribution of cement into the posterior border of the vertebra; f, g, h, The cannula was withdrawn point-by-point and the bone cement (1–2 mL) was injected with a specially designed delivery at each point