He is considered as one of the pioneers of this surgery. He participated in the advent of vascularized bone grafting techniques, participated in the discovery of many treatments for fractures and nonunion of the scaphoid, he participated in research in Kienbock disease and treatment of osteoarthritis. But it is mostly behind the development of wrist arthroscopy, a technique that has upset the understanding and treatment of disorders of the wrist ligaments. He assures its teaching on a regular basis over the 5 continents and has described many surgical techniques considered revolutionary