Material biocompatible and implantable in the human body, for the obtainment of a device that can be implanted in the human body or a spacer device for treating a bone or a joint seat, including an acrylic resin or a plastic material or polyethylene (PE) or low density polyethylene or high density polyethylene or ultra high molecular weight polyethylene (UHMWPE) or polypropylene or polyamide or polyetheretherketone (PEEK) or a mixture thereof, wherein the material can be moulded and includes an additive such as a pharmaceutical or medical substance and/or a radio-opacifying agent and/or a further additive; device that can be implanted in the human body or a spacer device for treating a bone or a joint location obtained with the aforementioned material and method for obtaining the material according to the present invention.