Fixation plate system for dorsal wrist fracture fixation

• US 20020032446A1
• Filed: 08/28/2001
• Published: 03/14/2002
• Est. Priority Date: 02/01/2000
• Status: Active Grant

• Current Assignee: Biomet Incorporated (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Hand Innovations LLC (Johnson & Johnson)
• Inventors: Orbay, Jorge L.
• Granted Patent: US 6,712,820 B2
• Time in Patent Office: Days
• US Class Current: 606/69
• CPC Class Codes: A61B 17/1728 for holes for bone plates or plate screws
• CPC Class Codes: A61B 17/68 Internal fixation devices , including fasteners and spinal fixators, even if a part thereof projects from the skin bone staples A61B17/0642
• CPC Class Codes: A61B 17/7208 Flexible pins, e.g. ENDER pins
• CPC Class Codes: A61B 17/7291 for small bones, e.g. in the foot, ankle, hand or wrist
• CPC Class Codes: A61B 17/80 Cortical plates , i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
• CPC Class Codes: A61B 17/8033 having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers
• CPC Class Codes: A61B 17/8042 the additional component being a cover over the screw head
• CPC Class Codes: A61B 17/8052 immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
• CPC Class Codes: A61B 17/8061 specially adapted for particular bones A61B17/70 and A61B17/74 take precedence
• CPC Class Codes: A61B 17/84 Fasteners therefor or fasteners being internal fixation devices
• CPC Class Codes: A61B 17/863 with thread interrupted or changing its form along shank, other than constant taper
• CPC Class Codes: Y10S 606/902 Cortical plate specifically adapted for a particular bone

Abstract

A dorsal fracture is treated from the volar side by using a T-shaped plate opposite the fracture. The plate is positioned against the volar side of the radial bone, a plurality of bone screws secure the plate along a non-fractured portion of the radial bone, and a plurality of bone pegs extend from the plate and into the bone fragments of the fracture. A support portion of the plate is provided distal of the bone pegs and supports comminuted bone fragments. One or more channels are optionally provided in the plate to receive wires which are adapted to anchor distal bone fragments to the plate. The plate is adapted in strength and materials to withstand the large bending forces thereon.

Claims

1. A fixation plate for volar side fixation of a dorsal fracture, comprising:

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 threaded peg holes adapted to individually receive fixation pegs therein, said plurality of threaded peg holes dividing said head portion between distal and proximal portions, said distal portion being larger than said proximal portion, said distal portion having a distal edge tapering in thickness, and

said body portion including at least one screw hole.

2. A fixation plate according to claim 1, wherein:

said peg holes are linearly arranged.

3. A fixation plate according to claim 1, wherein:

said head portion includes a plurality of tines.

4. A fixation plate according to claim 1, wherein:

said plate has a thickness of at least 4 mm.

5. A fixation plate according to claim 4, wherein:

said plate is made from a titanium alloy.

6. A fixation plate according to claim 1, wherein:

said plate has a thickness of approximately 4 mm to approximately 6 mm.

7. A fixation plate for volar side fixation of a dorsal fracture, comprising:

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 threaded peg holes adapted to individually receive fixation pegs therein, and also provided with at least one channel extending at least partially along a length of said head portion and not intersecting any of said threaded peg holes,

said body portion including at least one screw hole.

8. A fixation plate according to claim 7, wherein:

said at least one channel is not aligned with any of said threaded peg holes.

9. A fixation plate according to claim 7, wherein:

said at least one channel extends from a distal end of said head portion to a terminal location relatively proximal thereto, and at said terminal location each said at least one channel is provided with a hole extending through said plate.

10. A fixation plate for volar side fixation of a dorsal fracture, comprising:

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 threaded peg holes adapted to individually receive fixation pegs therein, and said body portion including at least one screw hole,

wherein said plate has a thickness of at least 4 mm and is made from a titanium alloy, and said head portion includes a tapered distal edge.

11. A fixation plate according to claim 10, wherein:

said plate has a thickness of approximately 4 mm to approximately 6 mm.

13. A system according to claim 12, wherein:

said wire is U-shaped.

14. A system according to claim 12, wherein:

said wire includes an anchoring means for anchoring into bone.

15. A system according to claim 12, wherein:

said plate includes at least one channel in which to partially receive said at least one wire.

16. A system according to claim 15, wherein:

said at least one channel is not aligned with any of said threaded peg holes.

17. A system according to claim 15, wherein:

said at least one channel extends from a distal end of said head portion to a terminal location relatively proximal thereto, and at said terminal location each said at least one channel is provided with a hole extending through said plate.

18. A system according to claim 12, further comprising:

c) a plurality of pegs adapted to be threadably received in said threaded peg holes; and

d) at least one screw adapted to be received through the at least one screw hole and tap into bone.

12. A fracture 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 threaded peg holes adapted to individually receive fixation pegs therein, and said body portion including at least one screw hole; and

b) at least one wire to secure a bone fragment of the dorsal fracture to said plate.