ABUTMENT AND COPING SYSTEM FOR USE WITH DENTAL IMPLANTS

摘要

A dental abutment (10) forms an abutment post (13) having a trans-mucosal base portion (11) and a supra-gingival portion having a smaller transverse external cross section than the proximal end of the base portion. The supra-gingival portion forms a through bore threaded at its proximal end (20) and stepped to form an internal shoulder (16) for seating the head of a screw for attaching the abutment post to the implant. The exterior surface of the abutment post forms a generally polygonal transverse cross section for receiving hollow components having interior surfaces that can be telescoped over the abutment post. The abutment post is used in an abutment system that includes a healing cap (30), an impression coping (40) and/or a prosthesis coping (60) forming an interior surface that can be telescoped over the supra-gingival portion of the abutment post. The opposed surfaces of the abutment post and the coping preferably have truncated corners (13b) that are very close to each other to maintain a coaxial relationship between the post and the coping, while the portions of the opposed surfaces adjacent to the truncated corners are spaced farther apart to permit limited angular movement of the post and coping relative to each other, and to permit the entry of dental cement between the opposed surfaces.