The invention primarily relates to fastening and stabilizing tissues, implants, and/or bondable materials, such as the fastening of a tissue and/or implant to a bondable material, the fastening of an implant to tissue, and/or the fastening of an implant to another implant. This may involve using an energy source to bond and/or mechanically to stabilize a tissue, an implant, a bondable material, and/or other biocompatible material. The invention may also relate to the use of an energy source to remove and/or install an implant and/or bondable material or to facilitate solidification and/or polymerization of bondable material.

The invention relates to a casting mold for producing a hip joint spacer, which comprises a head element comprising an upper shell and a lower shell, optionally a neck element, and a stem element, which comprises an upper shell and a lower shell, wherein the casting mold has a latching element, and an upper shell and a lower shell of the head element and/or of the stem element can be connected to one another by means of the latching element.