Spinal fusion is a surgical procedure carried out to treat degenerative diseases of the spine. Using bone from the pelvic bone or a bone bank, a link is made between two vertebrae in order to fuse them together. The procedure aims to stabilise the spine in order to relieve local pain. Spinal fusion is divided into anterior cervical fusion, posterior cervical arthrodesis and posterior lumbar spine fusion. It is performed in the operating room under general anaesthesia.