Casting mold for finger joint spacers

A device for producing finger joint spacers, the device comprising a lower part and an upper part, wherein the lower part is connectable to the upper part, wherein the lower part comprises a first mold cavity and the upper part comprises a second mold cavity, wherein the first mold cavity is configured to jointly form a hollow space together with the second mold cavity, wherein the first mold cavity comprises a spacer body mold for forming a body of a first one of the spacers and the second mold cavity comprises a shaft mold for forming a shaft of the first spacer, wherein the device further comprises a groove arranged circumferentially along at least one of the first and second mold cavities, and a bar which is arranged and configured to engage in the groove in a form-fitting matter in order to outwardly seal the hollow space by connecting the lower part to the upper part, wherein the groove and the bar are arranged and configured to form an empty space between the bar and the groove by engaging the bar into the groove, said empty space being designed to receive excess bone cement.