Bone fixation devices and methods

Patent metadata

Field	Value
Publication number	US-2021000517-A1
Application number	US-202017011585-A
Country	US
Kind code	A1
Filing date	Sep 3, 2020
Priority date	Aug 28, 2014
Publication date	Jan 7, 2021
Grant date	—

Abstract

The present disclosure provides devices, systems and methods of bone fixation. The disclosed devices, systems and methods facilitate secure fixation of first and second bone segments, such as to promote fusion thereof. The devices may include at least one bone engagement projection extending from an engagement surface of a plate portion for implantation into the first bone segment. A portion of the plate portion spaced from the at least one bone engagement projection may include at least one bone fixation aperture. The least one bone fixation aperture may allow for a one bone engagement projection to be inserted therethrough and into the second bone segment to affix the plate portion to the second bone segment. In some embodiments, the at least one bone fixation aperture may be a compression slot.

First claim

We claim:

1 . A fixation device for fixing bone segments, comprising:
a top surface and a bone engagement surface; a proximal portion including a fixation aperture configured for acceptance of a bone fixation mechanism therethrough and into a first bone segment; a distal portion including a second bone fixation aperture configured for acceptance of a bone fixation mechanism therethrough and into a second bone segment; a pair of bone engagement projections connected to and extending from the bone engagement surface for implantation into the first bone segment such that said pair of bone engagement projections extend normally relative to a longitudinal dimension of said proximal portion; and said distal portion being shaped in a longitudinal direction such that said distal portion extends dorsally further than said proximal portion when said bone engagement surface engages the first bone segment and the second bone segment.

2 . The fixation device of claim 1 , wherein said distal portion extends dorsally further than said proximal portion when said proximal portion is orientated substantially horizontally.

3 . The fixation device of claim 1 , wherein the proximal and distal portions are angled with respect to each other in a medial-lateral direction.

4 . The fixation device of claim 1 , wherein the proximal and distal portions are angled with respect to each other in the plantar-dorsal direction.

5 . The fixation device of claim 4 , wherein the bone engagement projections extend from the bone engagement surface in the plantar-dorsal direction, and wherein the bone engagement projections extend further in the plantar-dorsal direction than the distal portion when the proximal portion is orientated substantially horizontally.

6 . The fixation device of claim 4 , wherein the bone engagement projections extend from the bone engagement surface in the plantar-dorsal direction a distance further than that of the distal portion when the proximal portion is orientated substantially horizontally.

7 . The fixation device of claim 1 , wherein the proximal and distal portions are elongated in the proximal-distal direction, and wherein the distal portion defines a total length in the proximal-distal direction greater than a total length of the proximal portion in the proximal-distal direction.

8 . The fixation device of claim 1 , wherein the proximal and distal portions each define a width in the medial-lateral direction, and wherein the width of the proximal portion is greater than the width of the distal portion.

9 . The fixation device of claim 8 , wherein the distal portion is elongated in the proximal-distal direction, and wherein the width of the distal portion tapers as it extends in the proximal-distal direction away from the proximal portion.

10 . The fixation device of claim 9 , wherein the distal portion includes a narrow region in the medial-lateral direction positioned at least partially between the first aperture and the second aperture in the proximal-distal direction.

11 . The fixation device of claim 1 , wherein the bone engagement projections extend from a proximal bone engagement surface of the bone engagement surface of the proximal portion.

12 . The fixation device of claim 11 , wherein the bone engagement projections extend normally from the engagement surface of the proximal portion.

13 . The fixation device of claim 1 , wherein the bone engagement projections extend from a medial-lateral side of the proximal portion.

14 . The fixation device of claim 1 , wherein the second aperture is a compression slot.

15 . A fixation device for fixing bone segments, comprising:
a proximal portion defining a first width in the medial-lateral direction and comprising a pair of fixation apertures configured for acceptance of a bone fixation mechanism therethrough and to engage a first bone segment; a distal portion defining a second width in the medial-lateral direction that is less than the first width and comprising a third fixation aperture configured for acceptance of a bone fixation mechanism therethrough and to engage a second bone segment, and a pair of bone engagement projections located between the pair of fixation apertures in the medial-lateral direction and extending from the proximal portion for implantation into the first bone segment to substantially fix the first and second bone segments to each other.

16 . The fixation device of claim 15 wherein the proximal portion and the distal portion comprise a linear plate having a substantially flat top surface and a substantially flat bone engagement surface.

17 . The fixation device of claim 15 wherein the pair of bone engagement projections extend dorsally and toward said distal portion relative to a linear dimension of said linear plate.

18 . The fixation device of claim 28 wherein said third fixation aperture comprises a compression slot.

19 . The fixation device of claim 15 , wherein the distal portion is elongated in the proximal-distal direction, and wherein the width of the distal portion tapers as it extends in the proximal-distal direction away from the proximal portion.

20 . The fixation device of claim 18 , wherein the distal portion includes a fourth fixation aperture spaced from the compression slot in the proximal-distal direction toward the proximal portion, and wherein the distal portion includes a narrow region in the medial-lateral direction positioned at least partially between the compression slot and said fourth bone fixation aperture in the proximal-distal direction.

21 . The fixation device of claim 15 , wherein at least one bone engagement projection of the pair of bone engagement projections is proximate to each of the fixation apertures of the proximal portion and positioned proximate to an end of the proximal portion in the proximal-distal direction.

22 . The fixation device of claim 15 , wherein the pair of fixation apertures are positioned proximate to opposing ends of the proximal portion in the medial-lateral direction.

Assignees

• Nextremity Solutions Inc

Inventors

• Weiner Lon S
• Katchis Stuart D
• Pepper John R

Classifications

• A61B17/8014

  the extension or compression force being caused by interaction of the plate hole and the screws · CPC title

• A61B17/809

  with bone-penetrating elements, e.g. blades or prongs (bone staples A61B17/0642; intramedullary nails with a plate at an end A61B17/7233) · CPC title

• A61B17/8061 Primary

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