Bone screw
AssigneeBiedermann Technologies GmbH & Co. KG
InventorsLutz Biedermann, Jurgen Harms
Life of this patent
Estimating the term…
Abstract
A bone screw having a screw member possessing a threaded section and a head and a receiving part at the head end for receiving a rod to be connected to the bone screw is provided. The receiving part has on open first bore and a substantially U-shaped cross-section having two free legs provided with a thread. Furthermore, the receiving part has a second bore on the end opposite to the first bore whose diameter is greater than that of the threaded section and smaller than that of the head. On the bottom of the first bore a seat for the head is provided. In order that the screw member can be pivoted to at least one side by an enlarged angle, the edge bounding the free end of the second bore viewed relative to the axis of the first bore is of asymmetric construction.
Claims29
A bone fixation assembly comprising:
- a coupling element having an inner surface defining a first bore coaxial with a first longitudinal axis and a second bore, coaxial with a second longitudinal axis, wherein said first and second longitudinal axes intersect and are in communication with one another;
- said coupling element including a seat adjacent a lower end of said coupling element, said seat being defined by the inner surface of said coupling element;
- and
- an anchoring element assembled with said coupling element, said anchoring element having a first end for insertion into bone and a head spaced from the first end, said head being in contact with said seat of said coupling element.
A bone fixation assembly comprising:
- a coupling element having an upper end defining a first plane, a lower end defining a second plane, and at least one bore extending from said upper end toward said lower end, wherein said first and second planes intersect one another;
- an anchoring element assembled with said coupling element, said anchoring element being adapted for insertion into bone;
- and
- said coupling having a U-shaped opening that extends from the upper end of said coupling element toward the lower end of said coupling element, wherein the U-shaped element is adapted to receive a stabilizing rod.
A coupling element having an upper end and a lower end comprising:
- a first section extending from said upper end toward said lower end of said coupling element, said first section including a first bore coaxial with a first longitudinal axis;
- a second section extending from said lower end toward said upper end of said coupling element, said second section having a second bore coaxial with a second longitudinal axis that intersects said first longitudinal axis;
- a U-shaped rod-receiving opening extending from said upper end toward said lower end of said coupling element and being adapted to receive an orthopedic stabilizing rod;
- said coupling element having an inner surface defining said first and second bores and a seat adjacent said second bore at said lower end of said coupling element;
- and
- an anchoring element having a first end for insertion into bone and a head spaced from said first end, said head being in contact with said seat of said coupling element.
A coupling element for a bone fixation assembly comprising:
- an upper end defining a first plane;
- a lower end defining a second plane;
- at least one bore extending between said upper end and said lower end, said at least one bore being adapted to receive an anchoring element, wherein said first plane and said second plane intersect one another;
- said coupling element having a U-shaped opening that extends from the upper end of said coupling element toward the lower end of said coupling element, wherein said U-shaped opening is adapted to receive a stabilizing rod.
A coupling element for a pedicle screw assembly, comprising:
- said coupling including an inner surface having a first section at an upper end of said coupling element, said first section defining a first bore extending through said coupling element that is coaxial with a first longitudinal axis;
- the inner surface having a second section at a lower end of said coupling element, said second section defining a second bore extending through said coupling element that is coaxial with a second longitudinal axis, wherein said first and second longitudinal axes intersect one another.
Dependencies are inferred from the claim text.