Mold with removable inserts for forming a spacer device for the replacement of a joint prosthesis

A method of forming a spacer device for replacing a joint prosthesis, comprising:

• providing a mold comprising:
• a first half-shell or lower body;
• and
• a second half-shell or upper body,
• wherein the first half-shell or lower body and the second half-shell or upper body are configured to be removably coupled, in use, so as to define a closed configuration of the mold, in which at least one of the first half-shell or lower body or the second half-shell or upper body comprises a seat for housing an interchangeable insert that is part of a series of inserts;
• selecting the insert so as to select a size and/or a shape of the first forming surface and/or of the second forming surface based on anatomical needs of a patient and/or based on predetermined requirements of the spacer device;
• housing the insert in the seat;
• providing a material for making the spacer device and positioning or pouring the material in the first forming surface and/or in the second forming surface;
• coupling the first half-shell or lower body to the second half-shell or upper body, with the insert housed in the seat, so as to close the mold and delimit, at the first forming surface and the second forming surface, a cavity corresponding to an external configuration of the spacer device;
• waiting a time for polymerizing or hardening of the material and forming the spacer device.