A two-piece abutment system is disclosed. The first part includes a tapering inner surface which is part of a bore extending entirely through the first part. The first part includes a socket for mating with a boss or post on a dental implant. The elongated second part includes a threaded stem for engaging...http://www.google.es/patents/US5989026?utm_source=gb-gplus-sharePatente US5989026 - Ceramic two-piece dental abutment
