What is the medical term meaning a procedure that stiffens joint or joins several vertebrae?

The medical term for a procedure that stiffens a joint or joins several vertebrae is called arthrodesis. It is a surgical procedure that involves fusing two or more bones together in order to create stability and reduce pain. This procedure is often used to treat conditions such as osteoarthritis, rheumatoid arthritis, and spinal disorders. Arthrodesis can be performed on any joint in the body, but it is most commonly done on the spine, hip, knee, and ankle.