Bone plate supported by a leg member and used as a lever

• US 8,425,575 B2
• Filed: 09/27/2011
• Issued: 04/23/2013
• Est. Priority Date: 09/27/2010
• Status: Active Grant

• Current Assignee: Acumed Llc (Berkshire Hathaway Incorporated)
• Original Assignee: Acumed Llc (Berkshire Hathaway Incorporated)
• Inventors: Huebner, Randall J., Federspiel, Joshua P., Connors, Carol-Lynn E.
• Primary Examiner(s): Truong, Kevin T
• Assistant Examiner(s): KAMIKAWA, TRACY L
• Application Number:
  US13/246,684
• Publication Number:
  US 20120078311A1
• Time in Patent Office: 574 Days
• Field of Search: 606280-299, 606/86.B, 606/86.R, 606/88, 606/90, 606/99, 606/101, 606/102, 606/105, 606/905, 606915-916
• US Class Current: 606/281
• CPC Class Codes: A61B 17/1782 for the hand or wrist
• CPC Class Codes: A61B 17/8014 the extension or compression force being caused by interaction of the plate hole and the screws
• 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 17/808 Instruments for holding or positioning bone plates, or for adjusting screw-to-plate locking mechanisms
• 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 17/8866 for gripping or pushing bones, e.g. approximators joint distractors A61B17/025
• CPC Class Codes: A61B 2090/061 for measuring dimensions, e.g. length
• CPC Class Codes: A61B 2090/067 for measuring angles
• CPC Class Codes: A61B 6/12 Arrangements for detecting or locating foreign bodies
• CPC Class Codes: A61B 6/487 involving fluoroscopy

Abstract

System, including apparatus and methods, for fixing bone with a bone plate supported temporarily at a slant on bone by a leg member before the bone plate is used as a lever to reposition a region of the bone. In some embodiments, the leg member may be a post member that attaches to the bone plate by threaded engagement with an aperture of the bone plate. In some embodiments, the bone plate and the leg member may be used near the end of a long bone, such as on a distal portion of a radial bone.

Claims

1. A method of fixing bone, comprising:

selecting a bone plate including a first portion and a second portion;

disposing a leg member on the bone with the leg member attached to and projecting from the first portion of the bone plate to a first region of the bone, such that the first portion of the bone plate is supported at a slant with respect to the first region and spaced from the bone;

attaching the second portion of the bone plate to a second region of the bone;

disconnecting the leg member from the bone plate;

pivoting the first portion of the bone plate toward the first region of the bone such that the bone plate is used as a lever to change an orientation of the second region relative to the first region of the bone;

wherein the step of disconnecting the leg member is performed before the step of pivoting; and

attaching the first portion of the bone plate to the first region of the bone.

2. The method of claim 1, wherein the bone plate includes a third portion disposed along the bone plate between the first portion and the second portion, and wherein the step of disposing results in collective support of the first portion of the bone plate above the first region of the bone by the leg member and the third portion of the bone plate.

3. The method of claim 1, wherein the leg member is a post member, further comprising a step of disposing the post member in threaded engagement with an aperture defined by the first portion of the bone plate.

4. The method of claim 3, wherein the post member is a thumbscrew.

5. The method of claim 1, wherein the first region includes at least one fragment containing a majority of a shaft of a bone and the second region includes at least one end fragment of the bone.

6. The method of claim 1, wherein the step of pivoting includes a step of placing the first portion of the bone plate against a bone and at least generally parallel to a long axis defined by the bone.

7. A method of fixing bone, comprising:

selecting a bone plate including an elongated body portion connected to a head portion that is wider than the body portion;

disposing a leg member on the bone with the leg member attached to and projecting from the body portion of the bone plate to a shaft region of the bone, such that the body portion of the bone plate is supported at a slant above the shaft region;

attaching the head portion of the bone plate to an end region of the bone;

disconnecting the leg member from the bone plate;

pivoting the body portion of the bone plate toward the shaft region of the bone such that the bone plate is used as a lever to change an orientation of the end region relative to the shaft region of the bone;

wherein the step of disconnecting the leg member is performed before the step of pivoting; and

attaching the body portion of the bone plate to the shaft region of the bone.

8. The method of claim 7, wherein the bone is a radial bone, and wherein the step of pivoting adjusts a palmar inclination of a distal articular surface region of the radial bone.

9. The method of claim 8, further comprising a step of adjusting a radial inclination of the distal articular surface region by moving the body portion.

10. The method of claim 7, wherein the head portion has an inner surface that is contoured to match a surface region on the end region of the bone.

11. The method of claim 10, further comprising a step of adjusting an angle of slant of the body portion to provide a better fit of the head portion of the bone plate on the end region of the bone.

12. The method of claim 11, wherein the step of adjusting an angle of slant of the body portion includes a step of turning the leg member, a step of replacing the leg member with a different leg member, or a combination thereof.

13. A method of fixing bone, comprising:

selecting a bone plate including an arm portion, a fulcrum portion, and an anchor portion arranged in order along the bone plate;

disposing a post member on the bone with the post member extending through an aperture of the arm portion to a first region of bone and attached to the arm portion at the aperture, such that the fulcrum portion and the post member collectively support the arm portion in a spaced relation to the bone and at a slant with respect to the first region of the bone;

attaching the anchor portion of the bone plate to a second region of the bone;

disconnecting the post member from the bone plate;

pivoting the arm portion of the bone plate toward the first region of the bone such that the bone plate is used as a lever to change an orientation of the second region relative to the first region of the bone;

wherein the step of disconnecting the post member is performed before the step of pivoting; and

attaching the arm portion of the bone plate to the first region of the bone.

14. The method of claim 13, wherein the post member is attached to the aperture of the arm portion by threaded engagement.

15. The method of claim 13, wherein the post member includes a head connected to a shaft including an external thread, wherein the aperture of the arm portion is configured to receive the shaft but not the head, and wherein the head projects from an outer surface of the arm portion when the post member is fully advanced into the aperture.

16. The method of claim 15, wherein the head is a handle portion configured to be grasped by hand.

17. The method of claim 16, wherein the handle portion is cylindrical and has a knurled surface region.

18. The method of claim 13, wherein the post member is a thumbscrew.

19. The method of claim 13, wherein the post member has a stop structure that blocks advancement of the post member through the aperture of the arm portion.