Patent ID: 6648643
Filing Date: 2003-11-18
Classification: A61C

Abstract:
A dental implant-abutment interface and assembly, comprising:(a) an implant for insertion into an osseotomy site, said implant including an elongate body having a proximal end and a distal end, an axial threaded bore open at said proximal end, a radial end surface of a collar comprising said proximal end, and a plurality of axially circular recesses substantially arcuate in radial cross-section and disposed equipolarly about said threaded bore at said proximal end and extending distally away from said flat radial surface, each of said recesses include a curved outer wall having a tangent with common circle disposed inwardly of a circumference of said implant; (b) an abutment removably attachable to said implant for supporting a tooth prosthesis, said abutment including an axial bore, a proximal end, and a distal end comprising (i) a collar; and (ii) prongs projecting distally from a radial plane at a distal-most axial extent of said collar, said plane complementally engagable with said radial end surface of said implant, said prongs disposed equipolarly about said axial bore of said abutment, each of said prongs proportioned for engagement with a respective one of said axial recesses of said implant in which an area of radial cross-section defined by each of said prongs is less than an area of radial cross-section, at a like axial position, of said respective each one of said axial recesses with which said each prong is engaged, said axial bore of said abutment communicating with said axial bore of said implant, said radial plane of said collar having a like radius to that of said radial end surface of said implant; and (c) a screw, receivable in said axial bore and upon a screw head-engaging internal shoulder of said abutment, and having screw threads complementally engagable with said threaded bore of said implant.