Bone anchoring element
AssigneeBiedermann Technologies GmbH & Co. KG
InventorsLutz Biedermann, Jürgen Harms, Helmar Rapp
Life of this patent
Estimating the term…
Abstract
An anchoring element includes a screw having a shank with a bone thread portion and a head. The anchoring element also includes a receiving part for connecting the screw to a rod-shaped element, the screw and the receiving part being connected to one another in a polyaxial or monoaxial manner, and the shank of the screw being of tubular design and its wall having a plurality of recesses. The bone anchoring element provides for the bone screw to fuse with the surrounding bone substance, and at the same time bone portions or vertebrae can be positioned relative to one another and fixed. Moreover, a substance to be introduced into the bone can be introduced precisely at the desired site.
Claims24
A bone anchoring element for use in surgery of the spinal column or in trauma surgery comprising:
- a tubular shank element having a proximal end, a distal end, and a shank wall defining an inner cavity extending entirely through the shank element along a longitudinal axis from the proximal end to the distal end,
- the shank wall having a bone thread portion comprising an exterior bone thread having a helix crest and a thread root, the shank wall defining openings completely through the shank wall of the bone thread portion and communicating with the inner cavity;
- a head connectable to the proximal end;
- a tip connectable to the distal end;
- a receiving part configured to be polyaxially coupled to the head and having a U-shaped recess configured to receive a rod, the receiving part further defining an axial bore extending from a first end of the receiving part toward a second end of the receiving part;
- and
- a pressure element having an underside, the pressure element movable in the axial bore from the first end toward the second end to contact the head in the axial bore with its underside and arrest the head in one of a plurality of polyaxial positions in the axial bore;
- wherein the proximal end of the shank element is configured to engage a tool for driving the shank element into a bone;
- wherein the pressure element has a coaxial bore.
A bone anchoring element for use in surgery of the spinal column or in trauma surgery comprising:
- a tubular shank element having a proximal end, a distal end, and a shank wall defining an inner cavity extending entirely through the shank element along a longitudinal axis from the proximal end to the distal end,
- the shank wall having a bone thread portion comprising an exterior bone thread having a helix crest and a thread root, the shank wall defining openings completely through the shank wall of the bone thread portion and communicating with the inner cavity;
- a head connectable to the proximal end;
- a tip connectable to the distal end;
- a receiving part to be pivotally coupled to the head and having a U-shaped recess configured to receive a rod, the receiving part further defining an axial bore extending from a first end of the receiving part toward a second end of the receiving part;
- and
- a pressure element having an underside, the pressure element movable in the bore from the first end toward the second end to contact the head in the bore with its underside and arrest the head in its rotational position in the bore;
- wherein the proximal end of the shank element is configured to engage a tool for driving the shank element into a bone and wherein the proximal end of the shank element is sized to enter the bore through the second end of the receiving part for connecting to the head when the head is located in the receiving part;
- wherein, in a first assembled position, the head and receiving part are configured such that the head engages the receiving part in the bore for movement between the head and the receiving part in a polyaxial manner and in a second assembled position, the pressure element arrests the head in one of a plurality of polyaxial positions in the bore.
A bone anchoring element for use in surgery of the spinal column or in trauma surgery comprising:
- a tubular shank element having a proximal end, a distal end, and a shank wall defining an inner cavity extending entirely through the shank element along a longitudinal axis from the proximal end to the distal end;
- the shank wall having a bone thread portion comprising an exterior bone thread having a helix crest and a thread root, the shank wall defining openings completely through the shank wall of the bone thread portion and communicating with the inner cavity;
- a head connectable to the proximal end;
- and
- a tip connectable to the distal end;
- a receiving part configured to be coupled to the head, the receiving part having a U-shaped recess at a first end configured to receive a rod and having a bore at a second end opposite the first end;
- wherein, in an assembled position, the head and the receiving part are configured such that the head engages the receiving part in the bore for movement between the head and the receiving part in a polyaxial manner;
- wherein the proximal end of the shank element is configured to engage a tool for driving the shank element into a bone and wherein the proximal end of the shank element is sized to enter the bore through the second end of the receiving part for connecting to the head when the head is located in the receiving part.
Dependencies are inferred from the claim text.