Percutaneous vertebroplasty through unilateral and bilateral pedicle approaches and unilateral pedicle extrapedicle approach for the treatment of thoracolumbar vertebral compression fractures: bone cement perfusion volume and cement leakage rate  Chinese Journal of Tissue Engineering Research . 2020, (9): 1353 -1358 .  DOI: 10.3969/j.issn.2095-4344.2215