Two- Piece Fixture Mount Assembly

Abstract

A dental implant two-piece fixture mount includes an implant fixture-mount base portion at its distal end, and a snap-on, separate, separable top piece at its proximal end, the top-piece including an insertion-tool-engaging surface and a distal cylindrical skirt with a plurality of protrusions on the skirt's inner surface, and a distal insertion projection, the fixture-mount base portion including a separable proximal portion that includes a groove near the bottom of the separable proximal portion for engagement with the protrusions, a longitudinal through passage to receive a fixation screw for attachment of the fixture mount base portion to a dental implant, and that includes an internal, multi-sided region to anti-rotationally engage the distal insertion projection.

We claim: 
     
         1 . A dental implant two-piece fixture mount includes an implant fixture-mount base portion at its distal end, and a snap-on, separate, separable top piece at its proximal end, said top piece including an insertion-tool-engaging surface and a distal cylindrical skirt with a plurality of protrusions on the skirt's inner surface, and a distal insertion projection, said fixture-mount base portion including a separable proximal portion that includes a groove near the bottom of said separable proximal portion for engagement with said protrusions, a longitudinal through passage that is of a size and shape to receive a fixation screw for attachment of the fixture-mount base portion to a dental implant, and that includes an internal, multi-sided region of a size and shape to anti-rotationally engage said distal insertion projection. 
     
     
         2 . The fixture mount of  claim 1 , wherein said top piece and said fixture-mount base member include at least two alignable flat external surface regions, and a distal, multi-sided protrusion for engagement with a complementary, multi-sided inner surface in a passage formed inside a dental implant. 
     
     
         3 . The fixture mount of  claim 1 , wherein said top piece includes a longitudinal through internal passage, and wherein said skirt comprises a plurality of flexible fingers extending distally from the undersurface of a distally-sloping flange. 
     
     
         4 . The fixture mount of  claim 1 , further comprising a fixation screw that fits inside, and seats in said fixture-mount base portion, and is distal to said separable proximal portion. 
     
     
         5 . The fixture mount of  claim 1  wherein the insertion-tool-engaging surface comprises four flat sides and a plurality of integrally-formed springy fingers. 
     
     
         6 . The fixture mount of  claim 5 , wherein said top piece includes a longitudinal internal through passage. 
     
     
         7 . The fixture mount of  claim 5 , further comprising a fixation screw that fits inside, and seats in said fixture-mount base portion and is distal to said separable proximal portion. 
     
     
         8 . The fixture mount of  claim 5  wherein the insertion-tool-engaging surface comprises four flat sides and a plurality of integrally-formed springy fingers. 
     
     
         9 . The fixture mount of  claim 1 , wherein said separable, proximal portion includes internal, wrench-engaging surfaces. 
     
     
         10 . The fixture mount of  claim 5 , wherein said separable, proximal portion includes internal, wrench-engaging surfaces. 
     
     
         11 . The fixture mount of  claim 1 , further comprising a plurality of flat surfaces on said top portion and on said fixture-mount base portion. 
     
     
         12 . The fixture mount of  claim 5 , further comprising a plurality of flat surfaces that align when said top portion is placed atop said fixture-mount base portion. 
     
     
         13 . A dental implant fixture mount includes an implant fixture-mount base portion at its distal end, and a snap-on, separate, separable top piece at its proximal end, said top piece including an insertion-tool-engaging surface, a distal insertion projection, and a distal cylindrical skirt with a plurality of protrusions on the skirt's inner surface, said fixture-mount base portion including a longitudinal through passage that is of a size and shape to receive a fixation screw for attachment of the fixture-mount base portion to a dental implant, and that includes an internal, multi-sided region of a size and shape to anti-rotationally engage said distal insertion projection. 
     
     
         14 . The fixture mount of claim  15  wherein said dental cylindrical skirt fits inside said through passage, and each of said protrusions engage a groove in said passage.