Anchor-in-anchor system for use in bone fixation
AssigneeDePuy Synthes Products, Inc.
InventorsTom Overes, Robert Frigg, Silas Zurschmiede, Andreas Appenzeller
Life of this patent
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Abstract
An anchor-in-anchor fixation system is provided for securing underlying structure, such as bone. The fixation system includes a first bone anchor having a shaft for fixation to underlying bone, and a head that defines an internal bore. A second bone anchor extends through the bore and into underlying bone. A fixation assembly is also provided that includes one or more fixation systems coupled to an auxiliary attachment member configured for long bone fixation, spinal fixation, or fixation of other bones as desired.
Claims36
An anchor-in-anchor system, comprising:
- a first bone anchor including a first shaft and a first head, the first shaft extending along a first longitudinal shaft axis and configured to attach to underlying structure, and the first head defining a bore extending therethrough along a bore axis, wherein the bore axis and the first longitudinal shaft axis define an acute angle;
- and
- a second bone anchor including a second shaft and a second head, the second shaft extending along a second longitudinal shaft axis and configured to attach to underlying structure, the second bone anchor configured to be inserted into the bore.
An anchor-in-anchor fixation assembly comprising:
- one or more anchor-in-anchor systems, each anchor-in-anchor system including:
- a first bone anchor including a first shaft and a first head, the first shaft extending along a first longitudinal shaft axis and configured to attach to underlying structure, and the first head defining a bore extending therethrough along a bore axis, wherein the bore axis and the first longitudinal shaft axis define an acute angle;
- and
- a second bone anchor including a second shaft and a second head, the second shaft extending along a second longitudinal shaft axis and configured to attach to underlying structure, the second bone anchor configured to be inserted into the bore;
- and
- an auxiliary bone fixation device configured for attachment to the one or more anchor-in-anchor systems.
Dependencies are inferred from the claim text.