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A dental prosthodontic apparatus including an abutment which is implanted into the jaw of a patient and which is provided with a slot which accepts fitted risers of different lengths. The end of the riser is substantially flat and forms a shelf and the length of the riser is selected so that when the riser is inserted into the slot, the end is approximately level with the gum line of the patient. When a prosthesis is mounted to the abutment, the proximal margin of the prosthesis forms a gap between the margin of the prosthesis and the shelf formed by the inserted riser. The gap provided opposed surfaces against which a prying instrument can be worked in the event the prosthesis needs to be removed from the abutment.