Bone fracture fixation clamp with bone remodeling adaptability

Patent metadata

Field	Value
Publication number	US-10813675-B2
Application number	US-201816199647-A
Country	US
Kind code	B2
Filing date	Nov 26, 2018
Priority date	Nov 30, 2017
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

A device for treating a bone includes a first clamp member sized and shaped to be mounted over a bone laterally across a fixation plate positioned along a length of the bone. In addition, the device includes a second clamp member coupleable to the first clamp member so that, when the first and second clamp members are coupled together in an operative position, the first and second clamp members extend about at least a portion of a periphery of the bone. The second clamp member includes a spring feature biased toward an initial configuration and deflectable toward a second configuration away from the bone.

First claim

What is claimed is:

1. A device for treating a bone, comprising:
a first clamp member sized and shaped to be mounted over a bone laterally across a fixation plate positioned along a length of the bone, wherein the first clamp member includes a channel extending therethrough from a first opening at an end of the first clamp to a second opening; and
a second clamp member coupleable to the first clamp member so that, when the first and second clamp members are coupled together in an operative position, the first and second clamp members extend about at least a portion of a periphery of the bone, the second clamp member including a spring feature biased toward an initial configuration, the initial configuration being arranged so that, as the spring feature is deflected away from the initial configuration, the spring feature applies radial compression against the bone, the second clamp member including a stem portion sized and shaped be slidably inserted through the first opening of the channel so that an end of the stem portion extends beyond the second opening.

2. The device of claim 1 , wherein at least a portion of the second clamp member is formed of Nitinol.

3. The device of claim 1 , wherein the first clamp includes a groove sized and shaped to receive a fixation plate therein.

4. The device of claim 1 , further comprising a coupling element configured to threadedly engage the end of the stem portion to fix the first and second clamp members relative to one another.

5. The device of claim 1 , wherein the spring feature is defined by a reduced thickness portion of the second clamp member.

6. The device of claim 5 , wherein the reduced thickness is defined via a groove extending into an exterior surface of the second clamp member.

7. The device of claim 1 , further comprising a stop feature defining a maximum possible deflection of the second clamp member.

8. The device of claim 7 , wherein the stop feature is defined via a pair of wings extending along an exterior surface of the second clamp member, tips of the pair of wings extending toward one another and separated from one another by a distance corresponding to the maximum possible deflection of the second clamp member.

9. The device of claim 1 , wherein an interior bone-facing surface of the second clamp member includes teeth for gripping a bone over which the fixation clamp is fixed.

10. The device of claim 1 , a portion of the first clamp including a hole extending therethrough for receiving a bone fixation element therein.

11. A system for treating a bone, comprising:
a bone fixation plate configured to be positioned along a length of a bone, the bone fixation plate extending longitudinally from a first end to a second end and including a plurality of bone fixation element receiving openings extending therethrough; and
a fixation clamp including a first clamp member and a second clamp member coupleable to one another to extend about at least a portion of a periphery of the bone in an operative position, the first clamp member configured to be mounted over the bone fixation plate and the second clamp member being biased toward an initial configuration, the initial configuration being arranged so that, as the spring feature is deflected away from the initial configuration, the spring feature applies radial compression against the bone, wherein the first clamp member includes a channel extending therethrough from a first opening at an end of the first clamp to a second opening and the second clamp member includes a stem portion sized and shaped be slidably inserted through the first opening of the channel so that an end of the stem portion extends beyond the second opening.

12. The system of claim 11 , wherein at least a portion of the second clamp member is formed of Nitinol.

13. The system of claim 11 , wherein the first clamp includes a groove sized and shaped to receive a fixation plate therein.

14. The system of claim 11 , wherein the second clamp member includes a reduced thickness portion defining a deflectable portion of the second clamp member.

15. The system of claim 11 , wherein the fixation clamp includes a stop feature defining a maximum possible deflection of the second clamp member.

Assignees

• Depuy Synthes Products Inc

Inventors

• Fatone Peter
• Coombs Dana

Classifications

• A61B17/8061 Primary

  specially adapted for particular bones (A61B17/70 and A61B17/74 take precedence) · CPC title

• A61B17/8023

  Variable length plates adjustable in both directions · CPC title

• A61B17/82

  for bone cerclage {(apparatus for manipulating wires or straps A61B17/8861; wires, bands or straps other than cerclage A61B17/842)} · CPC title

• A61B17/8019

  where the means are a separate tool rather than being part of the plate · CPC title

• A61B17/68

  Internal fixation devices {, including fasteners and spinal fixators, even if a part thereof projects from the skin (bone staples A61B17/0642)} · CPC title