Hi.after knowing your complains I feel this is a residual pain which is seen after most of the vertebroplasty. The metal implants most of the time benign a foreign body in your body cause various reactions which may ultimately cause low back pain. In my clinic with such scenario I advice some life style modifications like to avoid unnecessary n extra ambulation whenever possible, not lifting have objects n taking rest whenever possible in between the walks. Some painkillers like ibuprofen and some muscle relaxant like thiocolchicoside for a few days added with local painkiller gel application to avoid systemic side effects of above painkillers. Even after this precautions and medications pain persists, I would have advised the metal implant removal surgery n then an MRI to know the exact pathology inside. U can discuss with your orthopaedic surgeon the above options n get a proper management under his guidance. U should continue neurobion to prevent any further damage to your nerves. I wish you a painless back n healthy life.