Patent ID: 6726481
Filing Date: 2004-04-27
Classification: A61C

Abstract:
A dental implant system having an implant adapted for insertion in a passage formed in a jawbone of a patient, said implant system comprising:an implant body having an external tapered cylindrical surface that tapers outwardly and downwardly from a top end of said implant body, said implant body having a threaded implant passage communicating with said top end, said external tapered cylindrical surface having a taper of about one degree to about eight degrees, said implant body having a projection extending from said top end of said implant body, said projection having a plurality of sidewall surfaces to form a first anti-rotational connection; an abutment adapted for use with said implant body, said implant being removably attached to said abutment, said abutment including a primary cavity in communication with a bottom end of said abutment, said primary cavity having an internal tapered cylindrical surface that tapers outwardly and downwardly for mating engagement with said external tapered cylindrical surface of said implant body to form a second anti-rotational connection by frictional engagement between said internal tapered cylindrical surface of said abutment and said external tapered cylindrical surface of said implant body, said internal tapered cylindrical surface having a corresponding taper of about one degree to about eight degrees, said second anti-rotational connection being a locking taper forming a hermetic seal; said projection substantially preventing rotation of said abutment when said abutment is seated on said implant body; and a fastener that communicates with said abutment and locates within said threaded implant passage for securing said abutment to said implant body, thereby eliminating the need of hammering action to seat said abutment to said implant body to achieve rotational stability.