Scan abutment for a dental implant having reduction of the fit clearance
The invention relates to a scan abutment ( 2 ), in particular an integrally manufactured scan abutment, for determination of the position of the front face ( 1.1 ) of a dental endosseous implant ( 1 ), wherein the abutment ( 2 ) has a longish, hollow shaft ( 4 ), and the shaft has an upper region ( 4.1 ), a central region ( 4.2 ) and a lower region ( 4.3 ). Moreover, the shaft ( 4 ) of the scan abutment with its central region ( 4.2 ) is attachable onto the front face ( 1.1 ) of the implant ( 1 ), and its lower region ( 4.3 ) is insertable into the connection geometry of the implant. The longish, hollow shaft ( 4 ) has a side wall ( 10 ). The shaft of the scan abutment has at least two to terminally extending slits ( 5 ) in its central region ( 4.2 ) and lower region ( 4.3 ) in the side wall ( 10 ). Two, three or four slits are preferred. Preferably, the slits ( 5 ) end in one recess ( 6 ) each, such as a circular recess, in the side wall ( 10 ) at their upper end and extend terminally in the side wall ( 10 ) to the bottom side of the shaft ( 4 ). Another subject matter of the invention is a kit comprising a scan abutment as well as the screw adjusted to the scan abutment or the bolt adjusted to the scan abutment.
1. Scan abutment ( 2 ) for determination of the position (x,y,z-coordinates) of a front face ( 1 . 1 ) of a dental endosseous implant ( 1 ), wherein the abutment ( 2 ) has a longish, hollow shaft ( 4 ), wherein the shaft ( 4 ) has an upper region ( 4 . 1 ), a central region ( 4 . 2 ) and a lower region ( 4 . 3 ), wherein the shaft ( 4 ) has a base ( 3 ) in the central region ( 4 . 2 ) with a planar bottom side ( 3 . 2 ), to which the lower region ( 4 . 3 ) of the shaft ( 4 ) adjoins, and the shaft ( 4 ) with its central region ( 4 . 2 ) with at least a part of the bottom side ( 3 . 2 ) of the central region ( 4 . 2 ) is attachable onto the front face ( 1 . 1 ) of the implant ( 1 ), and the lower region ( 4 . 3 ) is insertable into the connection geometry of the implant, and the longish, hollow shaft ( 4 ) is formed from a side wall ( 10 ),
wherein
the shaft ( 4 ) in its central region ( 4 . 2 ) and lower region ( 4 . 3 ) in the side wall ( 10 ) has at least two slits ( 5 ), each of which slits ( 5 ) extend in an apical direction from said central region ( 4 . 2 ) through said lower region ( 4 . 3 ) and terminate at a bottom of said side wall ( 10 ), and
wherein the scan abutment ( 2 ) is material-integral.
2. Scan abutment according to claim 1 , wherein the shaft ( 4 ), in its central region ( 4 . 2 ) and lower region ( 4 . 3 ) in the side wall ( 10 ), has at least two
a) axial slits ( 5 ), or
b) slits being inclined with respect to an axial orientation.
3. Scan abutment according to claim 2 , wherein
the shaft ( 4 ), in its central region ( 4 . 2 ) and lower region ( 4 . 3 ) in the side wall ( 10 ), has at least two
a) axial and parallel slits ( 5 ), or
b) slits being inclined from 10° to 30° with respect to the longitudinal axis.
4. Scan abutment according to claim 1 , wherein
the slits ( 5 ) end in a recess ( 6 ) in the side wall ( 10 ) at their upper end and extend terminally in the side wall ( 10 ) to the bottom side of the shaft ( 4 ).
5. Scan abutment according to claim 1 , wherein
the shaft ( 4 )
a) has at least two axial slits ( 5 ) laying in an axial plane (B) or axial plane (A) of the shaft, or
b) has at least four axial slits ( 5 ) laying in the axial plane (B) and in the axial plane (A) of the shaft.
6. Scan abutment according to claim 1 , wherein
the side wall ( 10 ) of the lower region ( 4 . 3 ) of the shaft ( 4 ) has at least one outer diameter being smaller than the diameter of the side wall ( 10 ) of the central ( 4 . 2 ), and wherein the side wall ( 10 ) of the lower region ( 4 . 3 ) has at least one undercut ( 11 ) in its outer periphery in the direction of the central region ( 4 . 2 ) of the side wall ( 10 ).
7. Scan abutment according to claim 1 , wherein
the side wall ( 10 ) of the lower region ( 4 . 3 ) subterminally to terminally at its outer periphery has at least one outwardly facing edge ( 8 . 1 ) on the side wall ( 10 ).
8. Scan abutment according to claim 1 , wherein
the inner surface ( 15 ) of the side wall ( 10 ) of the central region ( 4 . 2 ) is conically ( 7 ) designed, and the cone tapers in terminal direction to the bottom side of the scan abutment ( 4 ).
9. Scan abutment according to claim 1 , wherein
an O-ring ( 17 ) is arranged in the upper region ( 4 . 1 ) of the shaft ( 4 ).
10. Scan abutment according to claim 1 , wherein
the side wall ( 10 ) of the lower region ( 4 . 3 ) of the shaft ( 4 ) has at least one outer diameter being smaller than the diameter of the side wall ( 10 ) of the central ( 4 . 2 ), and wherein the side wall ( 10 ) of the lower region ( 4 . 3 ) subterminally to terminally at its outer periphery has an outwardly facing nose ( 16 ) on the sidewall ( 10 ).
11. Scan abutment according to claim 1 , wherein
the shaft ( 4 ) has a base ( 3 ) in the central region ( 4 . 2 ) to which the lower region ( 4 . 3 ) of the shaft ( 4 ) adjoins, wherein the base has a planar surface ( 9 ).
12. Scan abutment according to claim 1 , wherein
the side wall ( 10 ) of the lower region ( 4 . 3 ) of the shaft ( 4 ) has at least one outer diameter being smaller than the diameter of the side wall ( 10 ) of the central ( 4 . 2 ) and of the upper ( 4 . 1 ) region, and wherein the side wall ( 10 ) of the lower region ( 4 . 3 ) has at least one undercut ( 11 ) in its outer periphery in the direction of the central region ( 4 . 2 ) of the side wall ( 10 ).
13. Scan abutment according to claim 1 , wherein
the inner surface ( 15 ) of the side wall ( 10 ) of the central region ( 4 . 2 ) and of the lower region ( 4 . 3 ) is conically ( 7 ) designed, and the cone tapers in terminal direction to the bottom side of the scan abutment ( 4 ).
14. Scan abutment according to claim 1 , wherein
the side wall ( 10 ) of the lower region ( 4 . 3 ) of the shaft ( 4 ) has at least one outer diameter being smaller than the diameter of the side wall ( 10 ) of the central ( 4 . 2 ) and of the upper ( 4 . 1 ) region, and wherein the side wall ( 10 ) of the lower region ( 4 . 3 ) subterminally to terminally at its outer periphery has an outwardly facing nose ( 16 ) on the sidewall ( 10 ).
15. Kit comprising at least one scan abutment according to claim 1 and at least one of (A) or (B):
(A) a dental screw ( 19 ), wherein the screw has a screw head ( 21 ), optionally having a polygonal inside-socket- or torx-geometry, optionally of an inside-hexagon socket- or inside-octagon socket-geometry, and a shaft is arranged below the screw head, wherein the shaft has an external thread in at least one region, wherein the shaft ( 20 ) of the screw tapers conically ( 20 . 1 ) at least in part at its outer periphery ( 20 . 1 ) in the direction of the lower end of the screw; or
(B) a dental bolt ( 22 ), optionally for use for fastening of a scan abutment according to claim 1 on a dental implant, wherein the bolt ( 22 ) has a bolthead ( 23 ) and a shaft ( 24 ) below the bolt head, wherein a groove ( 24 . 1 ) is arranged in the region of the outer periphery of the shaft ( 24 ) of the bolt, and wherein the bolt has a platform ( 25 ) in the lower region of the shaft ( 24 ), at which the shaft ( 24 ) further tapers, and the shaft ( 24 ) at least in part conically to terminally ( 24 . 2 ) tapers below the platform.
16. A method comprising fastening a scan abutment according to claim 1 on a dental implant or on a spacer of a dental implant with (A) or (B):
(A) a dental screw ( 19 ), wherein the screw has a screw head ( 21 ), optionally having a polygonal inside-socket- or torx-geometry, optionally of an inside-hexagon socket- or inside-octagon socket-geometry, and a shaft is arranged below the screw head, wherein the shaft has an external thread in at least one region, wherein the shaft ( 20 ) of the screw tapers conically ( 20 . 1 ) at least in part at its outer periphery ( 20 . 1 ) in the direction of the lower end of the screw; or
(B) a dental bolt ( 22 ), optionally for use for fastening of a scan abutment according to claim 1 on a dental implant, wherein the bolt ( 22 ) has a bolthead ( 23 ) and a shaft ( 24 ) below the bolt head, wherein a groove ( 24 . 1 ) is arranged in the region of the outer periphery of the shaft ( 24 ) of the bolt, and wherein the bolt has a platform ( 25 ) in the lower region of the shaft ( 24 ), at which the shaft ( 24 ) further tapers, and the shaft ( 24 ) at least in part conically to terminally ( 24 . 2 ) tapers below the platform.
17. A method comprising coaxial orientation and fastening of the scan abutment according to claim 1 on an implant with (A) or (B):
(A) a dental screw ( 19 ), wherein the screw has a screw head ( 21 ), optionally having a polygonal inside-socket- or torx-geometry, optionally of an inside-hexagon socket- or inside-octagon socket-geometry, and a shaft is arranged below the screw head, wherein the shaft has an external thread in at least one region, wherein the shaft ( 20 ) of the screw tapers conically ( 20 . 1 ) at least in part at its outer periphery ( 20 . 1 ) in the direction of the lower end of the screw; or
(B) a dental bolt ( 22 ), optionally for use for fastening of a scan abutment according to claim 1 on a dental implant, wherein the bolt ( 22 ) has a bolthead ( 23 ) and a shaft ( 24 ) below the bolt head, wherein a groove ( 24 . 1 ) is arranged in the region of the outer periphery of the shaft ( 24 ) of the bolt, and wherein the bolt has a platform ( 25 ) in the lower region of the shaft ( 24 ), at which the shaft ( 24 ) further tapers, and the shaft ( 24 ) at least in part conically to terminally ( 24 . 2 ) tapers below the platform.