The sacroiliac joint can become inflamed and painful for a number of different reasons. Sometimes traditional injections do not provide pain relief that lasts for a long enough period of time. In these situations, a rhizotomy procedure may be the best option. Radiofrequency ablation uses an electric current to heat up a small section of the nerve that goes to the facet joint in order to stop the pain signal. This procedure can provide relief that will last for months for people with chronic pain due to arthritic joints.