The risk of proximalization of the thumb due to an inadequate interposition is generally minor and is usually caused by implant sintering. This can easily be compensated for by implanting a larger graft. Persistent instabilities are the most common cause of persistence of symptoms and can usually be remedied by autologous or allogeneic suspension arthroplasty. In addition, the entire range of endoprosthetics is also possible with a previous spare resection of the trapezium and the possibility of a complete trapeziectomy remains in any case. The obvious theoretical advantages of arthroscopic hemitrapeziectomy need to be confirmed in practice in future.