Volar fixation system with articulating stabilization pegs
AssigneeHand Innovations, Inc.
InventorsJorge L. Orbay, James Leone
Life of this patent
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Abstract
A volar fixation system includes a T-shaped plate intended to be positioned against the volar side of the radial bone, a plurality of bone screws for securing the plate along an non-fractured portion of the radial bone, and a plurality of bone pegs which extend from the plate and into bone fragments of a Colles' fracture. The plate includes including a plurality of screw holes and a plurality of threaded peg holes. The bone pegs can be articulated through a range of angles within respective peg holes and fixed at a desired angle within the range. 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.
Claims24
A volar fixation system, comprising:
- a) a substantially rigid plate including a distal head portion and a proximal body portion angled relative to said head portion,
- said head portion defining 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 spherical radius of curvature,
- said body portion including at least one screw hole;
- b) a plurality of pegs each having a head portion and a shaft portion, said shaft portion sized to be received though said peg holes, and said head portion having an outer surface with substantially a same spherical 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 engaging said set screw and applying a rotational force thereto,
- wherein when said pegs are provided into respective peg holes, each said peg may be positioned at any angle within a predefined range of angles relative to an axis normal to a lower surface of said head portion of said plate, and once so positioned, respective set screws threaded into said upper portions of said peg holes fix said pegs in their respective angles.
A volar fixation plate, comprising:
- a substantially rigid T-shaped plate including a distal head portion and a proximal body portion angled relative to said head portion,
- said head portion defining a plurality of peg holes adapted to individually receive fixation pegs therethrough, said peg holes each having an upper portion and a lower portion, the lower portion having spherical radius of curvature,
- said body portion including at least one screw hole.
A peg for insertion into a peg hole in a fracture fixation system, comprising:
- a) a head having an outer surface with a first substantially spherical radius of curvature and a concavity with a second substantially spherical radius of curvature, said head defining less than a hemisphere;
- and
- b) a cylindrical shaft coupled to said head, said shaft including a taper adjacent said head.
Dependencies are inferred from the claim text.