A method for making a ceramic body prosthetic implant or prosthetic implant component of Mg-TTZ ceramic from a powder that is a monoclinic zirconia having magnesium oxide for a stabilizer, which method comprises: providing a bisqued initial green body of ceramic by providing a powdered ceramic material, which is a monoclinic zirconia having magnesium oxide for a stabilizer, compressing the material in its powder form through a cold isostatic press operation (1, 2, 3, 18, 19) to form a raw, pressed initial green body, and then heating the raw, pressed initial green body to a bisque stage to provide the bisqued initial green body; and, after the foregoing steps are carried out without employing a binder additional to the powdered ceramic material, carrying out the following further steps: machining the bisqued initial green body to provide a machined bisqued green ceramic body such that the machined bisqued green ceramic body has a shape which is a precursor shape essentially analogous to, being of the same proportions as, the shape of, but larger than, the ceramic portion of a fired predetermined finished ceramic body prosthetic implant or prosthetic implant component (540, 550); and then firing the machined bisqued green ceramic body (6, 38, 39) to provide a fired Mg-TTZ ceramic body product, which is the same size and shape or essentially the same size and shape of the ceramic portion of the fired predetermined finished ceramic body prosthetic implant or prosthetic implant component. providing a bisqued initial green body of ceramic by providing a powdered ceramic material, which is a monoclinic zirconia having magnesium oxide for a stabilizer, compressing the material in its powder form through a cold isostatic press operation (1, 2, 3, 18, 19) to form a raw, pressed initial green body, and then heating the raw, pressed initial green body to a bisque stage to provide the bisqued initial green body; and, after the foregoing steps are carried out without employing a binder additional to the powdered ceramic material, carrying out the following further steps: machining the bisqued initial green body to provide a machined bisqued green ceramic body such that the machined bisqued green ceramic body has a shape which is a precursor shape essentially analogous to, being of the same proportions as, the shape of, but larger than, the ceramic portion of a fired predetermined finished ceramic body prosthetic implant or prosthetic implant component (540, 550); and then firing the machined bisqued green ceramic body (6, 38, 39) to provide a fired Mg-TTZ ceramic body product, which is the same size and shape or essentially the same size and shape of the ceramic portion of the fired predetermined finished ceramic body prosthetic implant or prosthetic implant component. machining the bisqued initial green body to provide a machined bisqued green ceramic body such that the machined bisqued green ceramic body has a shape which is a precursor shape essentially analogous to, being of the same proportions as, the shape of, but larger than, the ceramic portion of a fired predetermined finished ceramic body prosthetic implant or prosthetic implant component (540, 550); and then firing the machined bisqued green ceramic body (6, 38, 39) to provide a fired Mg-TTZ ceramic body product, which is the same size and shape or essentially the same size and shape of the ceramic portion of the fired predetermined finished ceramic body prosthetic implant or prosthetic implant component.