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US 6,709,434 B1Granted
Spinal osteosynthesis device
AssigneeSofamor S.N.C.
InventorsJose Gournay, Serge Governatori
Life of this patent
Estimating the term…
Abstract
A spinal osteosynthesis device comprising a bone anchorage element, a vertebral rod, a connector for interconnecting the rod and the anchorage element so that the anchorage element is capable of being angularly oriented in a polyaxial manner relative to the rod. A fixation element is provided for fixing the position of the connector in translation and in rotation relative to the rod. A clamp element is provided for clamping the bone anchorage element to the connector in a predetermined angular position independent of the fixation element.
Claims35
A spinal osteosynthesis device, comprising:
- a rod;
- a bone anchor having an anchoring portion and a connection portion;
- a connector defining an opening adapted to receive said connection portion of said bone anchor therein and a channel offset from said opening and adapted to receive a portion of said rod therein, said opening bound by at least one conical wall adapted to engage said connection portion to permit multi-axial orientation of said bone anchor within said opening;
- and
- a clamp member adapted for engagement with said connector and said bone anchor to lock said bone anchor in a selected orientation within said opening;
- and
- wherein said multi-axial orientation of said bone anchor within said opening occurs about at least two axes so as to define at least two degrees of freedom.
4 more elements
A bone implant apparatus, comprising:
- a rod;
- a bone anchorage element having a distal anchoring portion, a proximal threaded shank portion, and a head portion between said distal and proximal portions;
- a connector defining an opening therethrough to receive said bone anchorage element, a channel offset from said opening adapted to receive said rod, and a threaded hole in communication with said channel, said opening being bounded by at least one wall having a portion adapted to engage said head portion of said bone anchorage element, said wall being shaped and sized to engage said head portion of said bone anchorage element in a manner to permit multi-axial orientation of said bone anchorage element with respect to said opening;
- a set screw adapted to be threaded into said threaded hole and to bear against said rod when said rod is within said channel;
- and
- a nut adapted to be threaded on said proximal portion of said bone anchorage element to engage said connector, whereby said bone anchorage element is locked into a variable angular orientation falling within a range of angular orientations relative to said connector.
3 more elements
A spinal osteosynthesis device, comprising:
- a bone anchorage element;
- a vertebral rod;
- a connector for interconnecting the rod and the anchorage element so that said anchorage element is polyaxially orientable relative to the rod;
- first means for fixing the position of the connector in translation and in rotation on the rod;
- and
- second means for clamping the bone anchorage element to the connector in a variable angular position falling within a range of angular positions relative to the connector, said second means operating independent of said first means.
3 more elements
A connector for use in connecting a bone anchorage element to a rod in a bone implant apparatus, said connector comprising:
- a first member having an opening configured to receive a portion of the bone anchorage element, a channel offset from said opening and configured to receive a portion of the rod, and a hole communicating with said channel,
- wherein said opening is bounded by at least one wall configured to engage said portion of the bone anchorage element in a manner to allow said portion of the bone anchorage element to be oriented polyaxially with at least two degrees of freedom within said opening, and wherein said hole has an internal thread;
- and
- a second member threaded within said hole, whereby said second member can be threaded down against said portion of the rod within said channel to lock said first member with respect to the rod;
- and
- a nut adapted to engage a portion of the bone anchorage element and to lock the first member with respect to the bone anchorage element in a variable angular orientation falling within a range of angular orientations.
3 more elements
A bone implant apparatus, comprising:
- a rod;
- a bone anchorage element having a distal anchoring portion, a proximal threaded shank portion, and a head portion between said distal and proximal portions;
- a connector defining an opening therethrough to receive said bone anchorage element, a channel offset from said opening adapted to receive said rod, and a threaded hole in communication with said channel, said opening being bounded by at least one wall having a portion adapted to engage said head portion of said bone anchorage element, said wall of said opening defining a conical portion that is shaped and sized to permit multi-axial orientation of said bone anchorage element with respect to said opening;
- a set screw adapted to be threaded into said threaded hole and to bear against said rod when said rod is within said channel;
- and
- a nut adapted to be threaded on said proximal portion of said bone anchorage element to engage said connector, whereby said bone anchorage element is locked into a desired orientation.
3 more elements
A connector for use in connecting a bone anchorage element to a rod in a bone implant apparatus, said connector comprising:
- a first member having an opening configured to receive a portion of the bone anchorage element, a channel offset from said opening and configured to receive a portion of the rod, and a hole communicating with said channel,
- wherein said opening is bounded by at least one wall, said wall of said opening having two conical portions and a concavely rounded surface, said conical portions being sized to provide for polyaxial rotation of the bone anchorage element with at least two degrees of potential freedom within said opening, and wherein said hole has an internal thread;
- and
- a second member threaded within said hole, whereby said second member can be threaded down against said portion of the rod within said channel to lock said first member with respect to the rod.
1 more element
A connector for use in connecting a bone anchorage element to a rod in a bone implant apparatus, said connector comprising:
- a first member having an opening configured to receive a portion of the bone anchorage element, a channel offset from said opening and configured to receive a portion of the rod, and a hole communicating with said channel,
- wherein said opening is bounded by at least one wall, said wall of said opening having a conical portion to allow said portion of the bone anchorage element to be oriented polyaxially with at least two degrees of freedom within said opening, and wherein said hole has an internal thread;
- and
- a second member threaded within said hole, whereby said second member can be threaded down against said portion of the rod within said channel to lock said first member with respect to the rod.
1 more element
A spinal osteosynthesis device, comprising:
- a rod;
- a bone anchor having an anchoring portion and a connection portion;
- a connector defining an opening adapted to receive said connection portion of said bone anchor therein and a channel offset from said opening and adapted to receive a portion of said rod therein, said opening bound by at least one conical wall adapted to engage said connection portion to permit multi-axial orientation of said bone anchor within said opening;
- a fixation member adapted for engagement with said connector and said rod to lock said connector in a fixed position relative to said rod;
- and
- a clamp member adapted for engagement with said connector and said bone anchor to lock said bone anchor in a selected orientation within said opening;
- and
- wherein said clamp member operates independently of said fixation member.
5 more elements
A spinal osteosynthesis device, comprising:
- a rod;
- a bone anchor having an anchoring portion and a connection portion;
- a connector defining an opening adapted to receive said connection portion of said bone anchor therein and a channel offset from said opening and adapted to receive a portion of said rod therein, said opening bound by at least one conical wall adapted to engage said connection portion to permit multi-axial orientation of said bone anchor within said opening;
- a fixation member adapted for engagement with said connector and said rod to lock said connector in a fixed position relative to said rod;
- and
- a clamp member adapted for engagement with said connector and said bone anchor to lock said bone anchor in a selected orientation within said opening;
- and
- wherein said connector defines a threaded hole in communication with said channel;
- and
- wherein said fixation member comprises a set screw adapted for threading engagement along said threaded hole and into engagement with said rod.
7 more elements
Dependencies are inferred from the claim text.