Treatment of the posterior element pain through medial branch radiofrequency ablation or facet injections may be another tool in providing analgesia in those with pain after vertebral comp. Because these joints are made partially of cartilage, they can become easily damaged from degenerative diseases such as arthritis. Pin On Physical Therapy And Massage This is called a “medial branch block” (mbb), or just “nerve block.” the medial branch nerves are the wee nerves that send information to the brain about tissue condition in the facet joints.2 without those nerves, the facet joint reports nothing to the brain, and so the brain assumes all is well — a nearly perfect numbing. What if medial branch block doesn't work . What happens if the injections don’t work. The procedure will temporarily reduce pain […] If your pain is caused by a facet joint problem, you may feel relief of that pain for a few hours with a medial branch block. Doctors can try further tests for a prope...