Back to results
US 11,026,725 B2Granted
Hybrid spinal plates
AssigneeDePuy Synthes Products, Inc.
InventorsDavid D. Konieczynski, Michael Jacene, Michael Gorhan, Eric D. Kolb
Life of this patent
Estimating the term…
Abstract
Various spinal plating systems for use in treating spinal pathologies are provided. In certain exemplary embodiments, the spinal plating systems can be configured to allow a surgeon to select a bone screw construct having a particular range of motion for attaching a spinal plate to bone as needed based on the intended use. In one exemplary embodiment, the spinal plating system includes a first bone screw that is polyaxially movable relative to the spinal plate, and a second bone screw that has a range of motion that is substantially limited to a single plane.
Claims8
A spinal plating system, comprising:
- a spinal plate having a thru-bore extending from a non-bone-contacting surface of the spinal plate to a bone-contacting surface without threading, the thru-bore including a spherical proximal portion and an oblong distal portion and being configured to interchangeably receive variable angle bone screws and limited angle bone screws, the oblong distal portion defining a major diameter and a minor diameter, with the major diameter being larger than the minor diameter, wherein the thru-bore defines a central axis, the spherical proximal portion is symmetric to the central axis, and the oblong distal portion defines a first portion extending away from the central axis in a first direction and a second portion extending away from the central axis in a second direction, the first portion being opposite to the second portion with respect to the central axis and the first and second portions defining the major diameter of the oblong distal portion;
- a variable angle bone screw having a head with a spherical proximal portion and a cylindrical distal portion and a shank extending therefrom, the variable angle bone screw being polyaxially movable with respect to the spinal plate when the variable angle bone screw is seated in the thru-bore;
- and
- a limited angle bone screw having a head with a spherical proximal portion and a cylindrical distal portion and a shank extending therefrom, the limited angle bone screw being movable only in a single plane with respect to the spinal plate when the limited angle bone screw is seated in the thru-bore,
- wherein the cylindrical distal portion of the variable angle bone screw defines a first diameter that is greater than or equal to a maximum diameter of the shank of the variable angle bone screw, and
- wherein the cylindrical distal portion of the limited angle bone screw defines a second diameter that is greater than the first diameter and less than or equal to the minor diameter.
3 more elements
A spinal plating system, comprising:
- a spinal plate comprising:
- a concave distal bone-engaging surface;
- a proximal surface opposite to the distal bone-engaging surface;
- and
- at least one thru-bore extending from the proximal surface of the spinal plate to concave distal bone-engaging surface without threading, the thru-bore having a proximal inner wall encircling the thru-bore that is symmetrical about a central axis of the thru-bore and a distal inner wall encircling the thru-bore that is asymmetrical about the central axis, and
- first and second bone engaging fasteners, each fastener having a shank portion and a head formed thereon, the head including a spherical proximal portion and a cylindrical distal portion with the shank extending therefrom,
- wherein the proximal inner wall of the thru-bore is spherical in shape and configured to interchangeably receive the heads of the first and second bone engaging fasteners, and
- wherein the distal inner wall of the thru-bore is oblong in shape and configured to allow the shank portion of the first bone engaging fastener to move polyaxially with respect to the spinal plate and configured to restrict the shank portion of the second bone engaging fastener to movement in a single plane with respect to the spinal plate, the distal inner wall defining a major diameter and a minor diameter, with the major diameter being larger than the minor diameter,
- wherein the distal inner wall defines a first portion extending away from the central axis in a first direction and a second portion extending away from the central axis in a second direction, the first portion being opposite to the second portion with respect to the central axis and the first and second portions defining the major diameter of the distal inner wall,
- wherein the cylindrical distal portion of the first bone engaging fastener defines a first diameter that is greater than or equal to a maximum diameter of the shank of the first bone engaging fastener, and
- wherein the cylindrical distal portion of the second bone engaging fastener defines a second diameter that is greater than the first diameter and less than or equal to the minor diameter.
8 more elements
Dependencies are inferred from the claim text.