Radius plate assembly

• US 8,894,650 B2
• Filed: 03/12/2013
• Issued: 11/25/2014
• Est. Priority Date: 03/08/2010
• Status: Active Grant

• Current Assignee: Stryker European Operations Holdings, LLC (Stryker Corporation)
• Original Assignee: Memometal Technologies SA (Stryker Corporation)
• Inventors: Prandi, Bernard, Chick, Gregoire, Cognet, Jean Michel, Martinache, Xavier, Papalozos, Michal, Tchurukdichian, Alain
• Primary Examiner(s): Yang, Andrew
• Application Number:
  US13/796,256
• Publication Number:
  US 20130197519A1
• Time in Patent Office: 623 Days
• Field of Search: 606/70, 606/71, 606/280, 606/282, 606/295, 606/296
• US Class Current: 606/71
• CPC Class Codes: A61B 17/80 Cortical plates , i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
• CPC Class Codes: A61B 17/8004 with means for distracting or compressing the bone or bones

Abstract

An assembly for reducing a fracture between an epiphysis and a diaphysis of a bone has a bone plate having a fan-shaped outer end formed with a plurality of outer holes and a bar-shaped inner end extending along a longitudinal axis from the outer end and formed with a plurality of inner holes. The plate further is formed on the bar-shaped inner end with a longitudinally extending through going guide slot and between the guide slot and the outer holes with an aperture. A slide has a longitudinally extending leg with an inner end formed with a guide formation engaged into and longitudinally slidable along the guide slot and a crosspiece overlying the aperture and engaging the bone plate to both transverse sides of the aperture. The crosspiece is formed with a transversely elongated slide slot, and a slide screw engaged through the slide.

Claims

1. An assembly for reducing a bone fracture comprising:

a plate having a longitudinally extending throughgoing guide slot and an aperture; and

a slide having a guide received within and longitudinally slidable along the guide slot and an elongated slide slot extending in a direction transverse to the guide slot for receiving a fastener to be placed through the aperture of the plate.

2. The assembly of claim 1, wherein the guide slot and the aperture have a generally equal length in the longitudinal direction.

3. The assembly of claim 1, further comprising:

a fastener received through the slide slot of the slide and through the aperture of the plate.

4. The assembly of claim 1, wherein the plate has a fan-shaped outer end and a bar-shaped inner end extending along a longitudinal axis from the outer end.

5. The assembly of claim 4, wherein the outer end of the plate lies generally in a plane forming an acute angle with a plane in which the inner end of the plate generally lies.

6. The assembly of claim 5, wherein the acute angle is between 5 degrees and 15 degrees.

7. The assembly of claim 4, wherein the fan-shaped outer end defines a plurality of outer holes positioned distal to the aperture, the plurality of outer holes including at least a first hole distal to a second hole.

8. The assembly of claim 4, wherein the guide slot is defined by and extends through the inner end in a longitudinal direction.

9. The assembly of claim 4, wherein the aperture has an area between one-half and four-fifths of the outer end.

10. The assembly of claim 1, wherein the slide has a longitudinally extending leg and a cross-piece such that the slide is T-shaped.

11. The assembly of claim 10, wherein the cross-piece contacts the outer end on transversely opposing sides of the aperture.

12. The assembly of claim 1, wherein the aperture is generally triangular or trapezoidal.

13. A method of reducing a bone fracture comprising:

fastening a plate to a first bone part;

placing a slide against the plate such that a pin of the slide is received within a plate slot defined by the plate;

positioning a fastener within a slide slot defined by the slide and within an aperture defined by the plate; and

setting the fastener into a second bone part to press the slide against the plate and to press the plate against the second bone part.

14. The method of claim 13, wherein the plate includes a set of plate holes therethrough, further comprising:

aligning guide holes of a guide with at least some of the plate holes;

receiving a rod through at least one of the guide holes to maintain the position of the guide; and

forming a pilot hole for the fastener while maintaining the guide in position.

15. The method of claim 13, further comprising:

shifting the plate and the first bone part longitudinally relative to the second bone part such that the pin of the slide slides within the plate slot.

16. The method of claim 13, further comprising:

shifting the plate and the first bone part transversely relative to the second bone part such that the fastener slides within the slide slot.

17. The method of claim 13, wherein a length of the slide slot is positioned transversely to a length of the plate slot.

18. The method of claim 13, wherein the plate is fastened to the first bone part through outer holes defined by the plate distal to the aperture.

19. The method of claim 13, wherein the plate has a fan-shaped outer end and a bar-shaped inner end extending along a longitudinal axis from the outer end, and wherein the outer end of the plate lies generally in a plane forming an acute angle with a plane in which the inner end of the plate generally lies.

20. The method of claim 13, further comprising:

receiving a fastener through inner holes of the plate to fasten the plate to the second bone part, the inner holes of the plate being proximal to the aperture thereof.