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US 9,788,862 B2Granted
Sacral fixation system
AssigneeDePuy Synthes Products, Inc.
InventorsAzagen Mootien, Alfred Niederberger, Johann Fierlbeck, Martin Altmann, Martin Kaufmann
Life of this patent
Estimating the term…
Abstract
Sacral fixation implants can include first and second implant segments. One of the first and second implant segments is received in the other of the first and second implant segments, and the first and segments can be fixed with respect to movement toward and away from each other, thereby stabilizing a sacral fracture.
Claims17
A sacral fixation system comprising:
- a first implant segment having a first shaft sized to be inserted through a first bone location, the first implant segment defining a first proximal end and a first distal end opposite the first proximal end, a first abutment surface that extends out from the first shaft and is configured to abut the first bone location so as to prevent further insertion of the first shaft through the first bone location, wherein the first implant segment defines a first channel that extends through the first shaft from the first proximal end to the first distal end;
- and
- a second implant segment having a second shaft sized to be inserted through a second bone location, the second implant segment defining a second proximal end and a second distal end opposite the second proximal end, a second channel that extends from the second proximal end to the second distal end, and a second abutment surface that extends out from the second shaft and is configured to abut the second bone location so as to prevent further insertion of the second shaft through the second bone location, wherein at least the second distal end is sized to be received in the first channel at a location between the first and second bone locations;
- a Kirschner wire sized to extend through each of the first and second bone locations, such that the first and second channels are configured to receive the Kirschner wire as the first and second shafts are inserted through the first and second bone locations, respectively;
- and
- a first locking member configured to attach the first shaft to the Kirschner wire so as to fix the first implant segment with respect to movement away from the second implant segment, wherein the first locking member is separate from each of the first and second implant segments, and does not extend through the first and second shafts from the first proximal end to the second proximal end;
- and
- a second locking member, the second locking member configured to secure the second shaft to the Kirschner wire at least with respect to movement of the second shaft away from the first shaft,
- wherein the Kirschner wire is threaded, one of the first and second locking members comprises a locking nut that is internally threaded and thredable onto the Kirschner wire so as to abut a respective one of the first and second shafts, and apply a force against the respective one of the first and second shafts that urges the respective one of the first and second shafts toward the other of the first and second shafts, and the other of the first and second locking members comprises a locking cap having a flexible wall that is configured to compress against the Kirschner wire in response to a compression force applied to the flexible wall.
6 more elements
A sacral fixation system comprising:
- a first implant segment having a first shaft sized to be inserted through a first bone location, the first implant segment defining a first proximal end and a first distal end opposite the first proximal end, a first abutment surface that extends out from the first shaft and is configured to abut the first bone location so as to prevent further insertion of the first shaft through the first bone location, wherein the first implant segment defines a first channel that extends through the first shaft from the first proximal end to the first distal end;
- and
- a second implant segment having a second shaft sized to be inserted through a second bone location, the second implant segment defining a second proximal end and a second distal end opposite the second proximal end, and a second abutment surface that extends out from the second shaft and is configured to abut the second bone location so as to prevent further insertion of the second shaft through the second bone location, wherein the second implant segment defines a second channel that extends at least into the second distal end along a direction toward the second proximal end, and at least the second distal end is sized to be received in the first channel at a location between the first and second bone locations;
- and
- a fixation member having a fixation head and a fixation shaft that extends from the fixation head, the fixation shaft configured to be inserted through the first proximal end so as to attach to the second shaft in the second channel and capture an entirety of the first implant segment between at least a portion of the fixation head and at least a portion of the fixation shaft, such that the fixation member fixes the first and second implant segments with respect to movement of the first and second implant segments away from each other, wherein the fixation member is separate from each of the first and second implant segments, and does not extend through the first and second shafts from the first proximal end to the second proximal end.
2 more elements
Dependencies are inferred from the claim text.