Neuroradiologist David Kallmes injects medical bone cement into a patients spine

At the Mayo Clinic in Rochester, Minnesota, neuroradiologist David Kallmes injects medical bone cement into a patient’s spine to stabilize a painful vertebral compression fracture. A study directed by Kallmes at the clinic showed pain relief was almost the same one month later in a control group that received sham procedures. “Shocking to most people,” Kallmes said of the results. “Surprising to me.”