Arthrodesis plate

Patent metadata

Field	Value
Publication number	US-11266450-B2
Application number	US-201816349566-A
Country	US
Kind code	B2
Filing date	Mar 9, 2018
Priority date	Apr 11, 2017
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

The invention relates to an arthrodesis plate for the stiffening of joints, in particular finger joints, comprising a proximal and distal anchoring region which are connected to one another in a mechanically rigid manner, characterised in that at least one outer contour of one of the two anchoring regions has a cross-section which is undulating, for example roof-shaped, or is provided with alternating crests and troughs by means of coating, and/or has a transversal-sagittal cross-section.

First claim

The invention claimed is:

1. An arthrodesis plate for stiffening of finger joints, the arthrodesis plate comprising:
a longitudinal direction in a proximal-distal direction, a width direction in a mediolateral direction, and a height direction in a palmar-dorsal direction,
wherein a length of the arthrodesis plate in a longitudinal direction is larger than a width of the arthrodesis plate in the width direction and wherein the width is larger than a height of the arthrodesis plate in the height direction,

a proximal anchoring region and a distal anchoring region which are connected to one another in a mechanically rigid manner,
wherein a width of a transversal cross-section of the anchoring regions, the transversal cross-section being defined by the width and height directions, is greater than a height of the transversal cross-section,
wherein the proximal and distal anchoring regions have at least one of a sagittal cross-section, the sagittal cross-section being defined by the longitudinal and height directions, and the transversal cross-section an undulating outer contour, and
wherein the anchoring regions of the arthrodesis plate are insertable into a flat slot in the mediolateral direction, wherein the undulating outer contour is configured to press via its wave crests into boundary surfaces of the flat slot in the palmar-dorsal direction so that the anchoring regions are secured by a friction fit.

2. The arthrodesis plate according to claim 1 , wherein the anchoring regions are adapted to be anchored by way of a press fit in a flat slot in each of the two bone ends of a joint defect intended for arthrodesis by means of the arthrodesis plate.

3. The arthrodesis plate according to claim 1 , wherein a top side and bottom side of the anchoring regions have an undulating sagittal and/or transversal cross-section.

4. The arthrodesis plate according to claim 3 , wherein the undulating sagittal and/or transversal cross-section of the top side and bottom side extend parallel to one another at least in sections.

5. The arthrodesis plate according to claim 3 , wherein the undulating sagittal and/or transversal cross-section is zigzag-shaped with straight rising sides and straight falling sides.

6. The arthrodesis plate according to claim 1 , wherein the transversal cross-section which is rectangular.

7. The arthrodesis plate according to claim 6 , wherein corners of the rectangular transversal cross-section and/or edges of the arthrodesis plate have chamfers and/or are rounded.

8. The arthrodesis plate according to one of the claim 1 , wherein a volume of the two anchoring regions extends substantially linearly in the proximal-distal direction or that the two anchoring regions are oriented at an angle to one another.

9. The arthrodesis plate according to claim 8 , wherein the angle is 1° to 50°, or 5° to 45°, or 30°.

10. The arthrodesis plate according to claim 9 , wherein a pivotable and lockable connection is formed between the two anchoring regions, which makes the angle adjustable.

11. The arthrodesis plate according to claim 10 , characterised in that the lockable connection comprises complementary contact surfaces lying one on top of the other with star-shaped textures about a pivot axis, and/or can be locked in a form-fit and/or friction-fit manner.

Assignees

• Link Waldemar Gmbh Co

Inventors

• Link Helmut D
• Teuber Jan

Classifications

• A61B17/8061 Primary

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

• A61F2002/30265

  Flat parallelepipeds · CPC title

• A61F2002/30622

  Implant for fusing a joint or bone material · CPC title

• A61F2/4241

  for hands, e.g. fingers · CPC title

• A61F2002/4243

  for interphalangeal joints, i.e. IP joints · CPC title