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US 6,767,351 B2Granted
Fixation system with multidirectional stabilization pegs
AssigneeHand Innovations, Inc.
InventorsJorge L. Orbay, James Leone, Dennis L. Steffen
Life of this patent
Estimating the term…
Abstract
A fixation system includes a plate intended to be positioned against a bone, a plurality of bone screws for securing the plate along an non-fractured portion of the bone, and a plurality of bone pegs which extend from the plate and into bone fragments of the fracture to provide a supporting framework. The pegs can be oriented at various angles relative to an axis normal to the lower surface of the plate. For each peg, once the peg has been appropriately positioned within the peg hole, a set screw is threaded into the peg hole and tightened, thereby securing the peg in the selected orientation.
Claims20
A fracture fixation system, comprising:
- a) a substantially rigid plate defining a body portion and a head portion angled relative to said body portion, said plate having a plurality of peg holes adapted to individually receive fixation pegs therein, said peg holes having an upper portion and a lower portion, said upper portion having a first internal thread, and said lower portion having a radius of curvature, and said plate including at least one non-threaded screw hole;
- b) a plurality of pegs each having a head and a shaft, said shaft sized to be received through said peg holes, and said head having a lower surface with substantially a same radius of curvature as said lower portion of said peg holes;
- and
- c) a plurality of set screws each having a body including a second thread rotationally engageable with said first thread, and a proximal rotational engagement means for permitting a rotational force to be applied to said set screw,
- wherein when said pegs are provided into respective peg holes, each said peg may be positioned at a plurality of angles relative to an axis normal to a lower surface of a portion of said fixation plate surrounding a respective peg hole, and once so positioned, respective set screws when threaded into said upper portions of said peg holes fix said pegs at their respective angles.
2 more elements
A fracture fixation system, comprising:
- a) a substantially rigid plate defining a body portion and a head portion angled relative to said body portion, said plate having a plurality of peg holes adapted to individually receive fixation pegs therein, said peg holes having an upper portion and a lower portion, said upper portion having a first internal thread, and said lower portion having a surface with a radius of curvature and a relatively high coefficient of friction;
- b) a plurality of pegs each having a head and a shaft, said shaft sized to be received through said peg holes, and said head having a lower surface with substantially a same radius of curvature as said surface of said lower portion of said peg holes;
- and
- c) a plurality of set screws each having a body including a second thread rotationally engageable with said first thread, and a proximal rotational engagement means for permitting a rotational force to be applied to said set screw,
- wherein when said pegs are provided into respective peg holes, each said peg may be positioned at a plurality of angles relative to an axis normal to a lower surface of a portion of said fixation plate surrounding a respective peg hole, and once so positioned, respective set screws when threaded into said upper portions of said peg holes fix said pegs at their respective angles.
2 more elements
A fracture fixation system, comprising:
- a) a substantially rigid plate defining a body portion and a head portion angled relative to said body portion, said plate having a plurality of peg holes adapted to individually receive fixation pegs therein, said peg holes having an upper portion and a lower portion, said upper portion having a first internal thread, and said lower portion having a radius of curvature;
- b) a plurality of pegs each having a head and a shaft, said shaft sized to be received through said peg holes, and said head having a lower surface with substantially a same radius of curvature as said lower portion of said peg holes and also having a relatively high coefficient of friction;
- and
- c) a plurality of set screws each having a body including a second thread rotationally engageable with said first thread, and a proximal rotational engagement means for permitting a rotational force to be applied to said set screw,
- wherein when said pegs are provided into respective peg holes, each said peg may be positioned at a plurality of angles relative to an axis normal to a lower surface of a portion of said fixation plate surrounding a respective peg hole, and once so positioned, respective set screws when threaded into said upper portions of said peg holes fix said pegs at their respective angles.
2 more elements
A fracture fixation system, comprising:
- a) a substantially rigid plate defining a body portion and a head portion angled relative to said body portion and together configured in a T-shape, said plate having a plurality of peg holes adapted to individually receive fixation pegs therein, said peg holes having an upper portion and a lower portion, said upper portion having a first internal thread, and said lower portion having a radius of curvature;
- b) a plurality of pegs each having a head and a shaft, said shaft sized to be received through said peg holes, and said head having a lower surface with substantially a same radius of curvature as said lower portion of said peg holes;
- and
- c) a plurality of set screws each having a body including a second thread rotationally engageable with said first thread, and a proximal rotational engagement means for permitting a rotational force to be applied to said set screw,
- wherein when said pegs are provided into respective peg holes, each said peg may be positioned at a plurality of angles relative to an axis normal to a lower surface of a portion of said fixation plate surrounding a respective peg hole, and once so positioned, respective set screws when threaded into said upper portions of said peg holes fix said pegs at their respective angles.
2 more elements
A fracture fixation system, comprising:
- a) a substantially rigid plate defining a plurality of peg holes adapted to individually receive fixation pegs therein, said peg holes having a portion provided with a first internal thread;
- b) a plurality of pegs each having a head portion and a shaft portion, said shaft portion sized to be received through said peg holes, and said head portion having an upper portion and a lower portion, said upper portion defining a ball portion with a first substantially spherical radius of curvature, said lower portion having a second substantially spherical radius of curvature larger than said first substantially spherical radius of curvature;
- and
- c) a plurality of set screws each having a body including a second thread rotationally engageable with said first thread, a proximal rotational engagement means for permitting a rotational force to be applied to said set screw, and a socket having said first substantially spherical radius of curvature such that each said set screw and its respective peg are adapted to articulate relative to each other by movement of said ball portion within said socket,
- wherein when said pegs are provided into respective peg holes, each said peg may be positioned at a plurality of angles relative to an axis normal to a lower surface of said plate, and once so positioned, respective set screws when threaded into said upper portions of said peg holes fix said pegs at their respective angles.
2 more elements
Dependencies are inferred from the claim text.