An abutment assembly for use with a dental implant unit includes a metal pedestal unit which has a fitting bushing adapted to fittingly engage a tubular fitted wall of an implant member, a ceramic abutment body which has an annular cut-out in a bottom wall thereof to be mounted on the pedestal unit, and a tubular packing member which has a bearing ledge on an inner peripheral surface to be pressed by a bolt member when the bolt member is threadedly engaged with the implant member, and a pressing region on an outer peripheral surface to be brought to intimately abut against a pressed region of an inner tubular wall surface of the abutment wall so as to place the abutment body in a tightened position.
