The patients will be X-rayed before and after the operation, they will have an immobilization for 3 weeks. Then the cast will be removed, and new X-rays will be taken. Then the patients will be allowed to perform their daily activities. A new follow-up control will take place 6 week later, it will include a new series X-rays and functional scores. At this point, people will be able to start physiotherapy. New functional scores and X-ray assessments will still be taken 3 and 6 months later.