If the facet joints(zygapophyseal joints) are suspected of being the source of some or all of the spine related pain, these can be injected with anesthetic and corticosteroids to see if the pain can be blocked or if an element of the pain can be blocked. A successful block should lead to blocking of the medial branches of the Dorsal nerve root that are fed by the facet joint. Subsequenty if there is a positive response, the medial branches can be disrupted with heat applied to the end of the needle. The medial branches only transmit pain signals from the facet joints. When these nerves are burned the signal will be interrupted. They will grow back, but this usually takes several months to a year and can result in long term pain relief, with repeat procedures as indicated.