Objective: To gather insight in short-term recovery and patient experience after a trapeziectomy or TMC prosthesis regarding pain, pain medication, function and quality of life. Study design: A prospective observational cohort diary study. Study population: In total 200 subjects with TMC-joint osteoarthritis will participate: 100 subjects will have trapeziectomy and 100 subjects will have TMC-joint arthroplasty Main study parameters/endpoints: The main study parameters are the pain, function and quality of life during the first 8 weeks after surgery. Nature and extent of the burden and risks associated with participation, benefit and group relatedness: Subjects will have no direct benefit from participation in this study. Subjects will only complete a diary and questionnaires for this study. Therefore, we expect no risks from participation. The burden for subjects consists of approximately five minutes daily for the diary in the first eight weeks after surgery.