An invasive, surgical procedure performed to decompress a spinal nerve root. The procedure involves exposing the affected vertebra and removing one or both facet joints that are rubbing against the nerve. Each vertebra contains two facet joints that allow for spine mobility. They help a person bend forward, stand straight, and rotate left and right. Serious injuries to the spine and age-related degenerative disorders are the main causes of facet problems. If cartilage tissue around the joints erodes or tears, the bones may rub together and compress underlying nerves. The goal of facetectomy is to completely remove one or more facets in order to preserve nerve functioning.