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US 9,848,891 B2Granted
Tool and method for generating an undercut in a bone
AssigneeKarl Storz GmbH & Co. KG
InventorSascha Berberich
Life of this patent
Estimating the term…
Abstract
A tool according to the invention for generating an undercut in a bone including a core with a shaft and a stamp mounted on a distal end of the shaft, wherein the stamp, in a transition area to the shaft, has a run-on bevel ascending in the distal direction, and a cutting sleeve which is arranged to be longitudinally movable on the shaft and of which the distal end is formed by at least one segment that can be spread open when pushed onto the run-on bevel, wherein the at least one segment has at least one laterally arranged cutting edge. The invention also relates to a method for generating an undercut in a bone.
Claims17
A tool for generating an undercut in a bone, the tool comprising:
- a core with a shaft;
- a stamp mounted on a distal end of the shaft, wherein the stamp, in a transition area to the shaft, has a run-on bevel ascending in a distal direction;
- and
- a cutting sleeve which is arranged to be longitudinally movable on the shaft and of which the distal end is formed by at least one segment that can be spread open when pushed onto the run-on bevel, wherein the at least one segment has at least one laterally arranged cutting edge, and wherein the at least one segment has a leading edge and a trailing edge in relation to a predefined rotational direction of the cutting sleeve, wherein the leading edge at least partially defines the at least one laterally arranged cutting edge;
- wherein the trailing edge is arranged radially deeper than the leading edge.
2 more elements
A tool for generating an undercut in a bone, the tool comprising:
- a core with a shaft;
- a stamp mounted on a distal end of the shaft, wherein the stamp, in a transition area to the shaft, has a run-on bevel ascending in a distal direction;
- and
- a cutting sleeve which is arranged to be longitudinally movable on the shaft and of which the distal end is formed by at least one segment that can be spread open when pushed onto the run-on bevel, wherein the at least one segment has at least one laterally arranged cutting edge;
- wherein the stamp and the shaft of the core have an inner hollow space continuing into a proximal end area of the shaft, and the stamp has at least one lateral aperture.
2 more elements
A method for generating an undercut in a bone, comprising:
- providing a core with an elongate shaft and with a stamp which is mounted on a distal end of the shaft and which, in a transition area to the shaft, has a run-on bevel ascending in a distal direction, and a cutting sleeve, which is longitudinally movable on the shaft and of which a distal end is formed by at least one segment that can be spread open when pushed onto the run-on bevel and has at least one laterally arranged cutting edge, wherein the at least one segment has a leading edge and a trailing edge in relation to a predefined rotational direction of the cutting sleeve, wherein the leading edge at least partially defines the at least one laterally arranged cutting edge, wherein the trailing edge is arranged radially deeper than the leading edge;
- inserting a distal portion of the core and a distal portion of the cutting sleeve into a bore that has been introduced into the bone;
- and
- rotating the cutting sleeve and moving the cutting sleeve in the distal direction relative to the core in such a way that the at least one segment is spread open over the run-on bevel and the cutting edge of the at least one segment removes bone tissue from a wall of the bore.
1 more element
A method for generating an undercut in a bone, comprising:
- providing a core with an elongate shaft and with a stamp which is mounted on a distal end of the shaft and which, in a transition area to the shaft, has a run-on bevel ascending in a distal direction, and a cutting sleeve, which is longitudinally movable on the shaft and of which a distal end is formed by at least one segment that can be spread open when pushed onto the run-on bevel and has at least one laterally arranged cutting edge, wherein the at least one segment has a leading edge and a trailing edge in relation to a predefined rotational direction of the cutting sleeve, wherein the leading edge at least partially defines the at least one laterally arranged cutting edge, and wherein the stamp and the shaft of the core have an inner hollow space continuing into a proximal end area of the shaft, and the stamp has at least one lateral aperture;
- inserting a distal portion of the core and a distal portion of the cutting sleeve into a bore that has been introduced into the bone;
- and
- rotating the cutting sleeve and moving the cutting sleeve in the distal direction relative to the core in such a way that the at least one segment is spread open over the run-on bevel and the cutting edge of the at least one segment removes bone tissue from a wall of the bore.
1 more element
Dependencies are inferred from the claim text.