The life of a professional sportsman isn't easy, and your future can change with one quick injury. Koen, a young champion windsurfer, was suffering from a long battle with lateral compartment arthritis in his knee that left him unable to continue his athletic lifestyle. Though he had already undergone ACL reconstruction and lateral meniscectomy, they were unsuccessful at getting Koen back into the water. However, thanks to the help of specialized surgical planning tools from Materialise Koen was able to make a full recovery and get back to the sport he loved.