Listhesis means that two vertebrae slip on each other. In this case, the nerves next to them might experience pressure or tension, which causes extended symptoms and problems for the patients. Operation is not always a solution in the case of listheis either, but when it is required, spine-fixation operation is applied. This kind of operation also involves many various techniques, but most frequently long screws and fixing rods are applied to fix the vertebrae. Naturally, in all such cases an individual evaluation is carried out by the specialist .