The chondral changes of the carpus are frequent, often after trauma but also being able to be secondary with degenerative disease. The wrist arthroscopy generally makes it possible to make the diagnosis of these lesions, before they are visible by the usual paraclinic examinations. It will make it possible to withdraw foreign body, cartilage or osseous fragments free in the articulation at the origin of pains. It will also allow the abrasion of small size area of chondral change. Lastly, it will be an essential tool for a secondary conventional treatment. The installation of partial implants in necrosis of proximal pole by arthroscopy is a recent technique very well adapted.