The treatment of osteo-arthritis of the hand and wrist can be demanding for a hand surgeon. A vast majority of options is available, but selecting the best treatment for your patient can be difficult. Therefore we designed a two-day course with theoretical and practical sessions with surgical procedures that are available for hand and wrist osteoarthritis. The practical sessions will be performed on fresh frozen cadavers with two participants per extremity. The Osteo-Arthritis Esser Masterclass will be organized every 3 years.