Abstract: A dental prosthesis blank and a combined dental prosthesis blank and blank holder. The dental prosthesis blank provides for forming a dental prosthesis therefrom and the blank holder holds the blank during the forming of the prosthesis. The blank comprises a first free end for forming the dental prosthesis therefrom and a positioning end for positioning the blank in the blank holder. The positioning end includes a cylindrical cone, i.e. extension, having a pair of reference surfaces defined by a slot extending along the axis of the cylindrical extension. The blank holder includes a reference element such as a bar that fits within the space between the reference surfaces.