System for stabilization of fractures of convex articular bone surfaces including subchondral support structure

• US 20050182405A1
• Filed: 01/21/2005
• Published: 08/18/2005
• Est. Priority Date: 01/23/2004
• Status: Active Grant

• Current Assignee: Biomet Incorporated (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Depuy Products Incorporated (Johnson & Johnson)
• Inventors: Castaneda, Javier E., Orbay, Jorge L., Cavallazzi, Cesare
• Granted Patent: US 7,780,710 B2
• Time in Patent Office: Days
• US Class Current: 606/289
• CPC Class Codes: A61B 17/746 the longitudinal elements coupled to a plate opposite the femoral head
• CPC Class Codes: A61B 17/8047 wherein the additional element surrounds the screw head in the plate hole A61B17/8052 takes precedence
• CPC Class Codes: A61B 17/8061 specially adapted for particular bones A61B17/70 and A61B17/74 take precedence

Abstract

A fracture fixation system is provided for a fracture of a head portion of a long bone which has subchondral bone defining a convex articular surface. The system includes a plate element positionable on the long bone substantially opposite the head portion of the long bone and on a first side of the fracture, and a post element extending from the plate and into the head portion and across the fracture. A support structure for supporting of the subchondral bone of the articular surface is coupled to the post.

Claims

1. A proximal humeral fracture fixation system, comprising:

a) a proximal humeral plate including a head portion with a post hole and a shaft portion with at least one bone screw hole;

b) a post insertable into said post hole;

c) first means for rotationally fixing said post in said a post hole in a predetermined orientation; and

d) second means coupled to said post and extending transversely to said post.

2. A proximal humeral fracture fixation system according to claim 1, wherein:

said first means includes a cam.

3. A proximal humeral fracture fixation system according to claim 1, wherein:

said first means includes a set screw.

4. A proximal humeral fracture fixation system according to claim 1, wherein:

said first means includes threads machined on said post hole and said post.