Fixation device

• US 20030055429A1
• Filed: 09/19/2001
• Published: 03/20/2003
• Est. Priority Date: 09/19/2001
• Status: Active Grant

• Current Assignee: Biomet Incorporated (Zimmer Biomet Holdings, Inc.)
• Original Assignee: City University of Hong Kong
• Inventors: Ip, Wing-Yuk, Lau, Ting-Lai
• Granted Patent: US 6,652,530 B2
• Time in Patent Office: Days
• US Class Current: 606/69
• CPC Class Codes: A61B 17/8085 with pliable or malleable elements or having a mesh-like structure, e.g. small strips A61B17/8071, A61B17/8076 take precedence
• CPC Class Codes: A61B 2017/00004 (bio)absorbable, (bio)resorbable or resorptive

Abstract

The present invention relates to a fixation device for internally fixing fractures. The fixation device has an elongated support plate and a transverse plate and a fin member extending transversely from the elongated support plate. The elongated support plate and the transverse plate define a plurality of holes for receiving fixing elements to mount the fixation device onto a bone. The holes can be so located that the fixing elements can prevent the fixation device from rotating relatively to the bone after the fixation device is mounted onto the bone. Additionally, the fin member is formed to be more flexible than the transverse plate. Thereby, the fin member can be bent to conform to the contour of the bone for fixing or stabilizing a fractured fragment. As a result, the fixation device can both support the injured bone and fix/stabilize the fractured fragment.

Claims

1. A fixation device for internally fixing fractures, comprising:

an elongated support plate;

a transverse plate fixed to and extending transversely from the elongated support plate; and

a fin member fixed to and extending transversely from the elongated support plate;

wherein the elongated support plate, the transverse plate, and the fin member extend in the same plane;

wherein the elongated support plate and the transverse plate define a plurality of first holes therein for receiving first fixing elements to mount the fixation device onto a bone, the first holes being so located that the first fixing elements can prevent the fixation device from rotating relatively to the bone after the fixation device being mounted onto the bone; and

wherein the fin member is more flexible than the transverse plate so that the fin member can be bent to conform to the contour of the bone for fixing the fractures.

2. The fixation device of claim 1, wherein the elongated support plate and the fin member each have a first and a second thickness, respectively, and wherein the first thickness is larger than the second thickness.

3. The fixation device of claim 1, wherein there are a plurality of fin members extending on opposite sides of the elongated support member.

4. The fixation device of claim 3, wherein there are a plurality of fin members extending on the same side of the elongated support member.

5. The fixation device of claim 1, wherein the fin member defines a second hole therein for receiving a second fixing element to fix a fractured bone.

6. The fixation device of claim 1, wherein the fin member defines a plurality of second holes therein.

7. The fixation device of claim 5, wherein the first and second holes are circular and each have a diameter of less than about 2 mm.

8. The fixation device of claim 5, wherein the first and second holes are circular and each have a diameter ranging from about 1.3 mm to about 2 mm.

9. The fixation device of claim 8, wherein each first hole has a diameter of about 1.7 mm.

10. The fixation device of claim 8, wherein the second hole has a diameter ranging from about 1.3 mm to about 1.5 mm.

11. The fixation device of claim 8, wherein the second hole has a diameter of about 1.3 mm.

12. The fixation device of claim 6, wherein the first holes have a larger dimension than the second hole.

13. The fixation device of claim 3, wherein the fin members each have at least one remote end and wherein each remote end comprises a cut-out portion for accommodating a third fixing element to provide further support for fractured bones.

14. The fixation device of claim 1, wherein the transverse plate comprises a plurality of first holes for mounting the fixation device to differently sized bones.

15. The fixation device of claim 1, wherein the elongated support plate comprising two ends and wherein the transverse plate is fixed to one of the two ends for mounting onto one end of the bone.

16. The fixation device of claim 3, wherein the fin members are removable from the elongated support plate to minimize the total contact area between the fixation device and the bone.

17. The fixation device of claim 6, wherein the fin members have a reduced portion between adjacent second holes to minimize the total contact area between the fixation device and the bone and to facilitate smooth bending of the fin members.

18. The fixation device of claim 1, wherein the elongated support plate, the transverse plate, and the fin member each have at least one remote end, and wherein the remote ends are rounded to form a smooth contour of the fixation device.

19. A fixation device for internally fixing fractures, comprising:

first and second support plates transversely fixed to each other;

a plurality of fin members fixed to and extending transversely from at least one of the support plates;

wherein the first and second support plates define a plurality of first holes therein for receiving fixing elements to mount the fixation device onto a bone, the first holes being so located that the fixing elements can prevent the fixation device from rotating relatively to the bone after the fixation device being mounted onto the bone; and

wherein the fin members are more flexible than either the first or the second plate so that the fin members can be bent to conform to the contour of the bone for fixing the fractures.