Compliant osteosynthesis fixation plate

• US 8,679,163 B2
• Filed: 09/14/2004
• Issued: 03/25/2014
• Est. Priority Date: 07/15/2003
• Status: Active Grant

• Current Assignee: DSM IP Assets BV (DSM-Firmenich AG)
• Original Assignee: Kensey Nash Corporation (DSM-Firmenich AG)
• Inventors: Ringeisen, Timothy A.
• Primary Examiner(s): Philogene, Pedro
• Assistant Examiner(s): COMSTOCK, DAVID C
• Application Number:
  US10/940,117
• Publication Number:
  US 20050085817A1
• Time in Patent Office: 3,479 Days
• Field of Search: 606/23.75, 606/69, 606/70, 606/72, 606/86, 606/76, 623/11.11, 623/23.51, 623/23.57, 623/23.58, 623/23.61, 623/23.72, 623/23.75
• US Class Current: 606/284
• 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 17/8061 specially adapted for particular bones A61B17/70 and A61B17/74 take precedence
• CPC Class Codes: A61B 17/8085 with pliable or malleable elements or having a mesh-like structure, e.g. small strips A61B17/8071, A61B17/8076 take precedence
• CPC Class Codes: A61B 2017/00004 (bio)absorbable, (bio)resorbable or resorptive
• CPC Class Codes: A61L 2300/00 Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
• CPC Class Codes: A61L 31/04 Macromolecular materials
• CPC Class Codes: A61L 31/125 having a macromolecular matrix
• CPC Class Codes: A61L 31/146 Porous materials, e.g. foams or sponges
• CPC Class Codes: A61L 31/148 Materials at least partially resorbable by the body
• CPC Class Codes: A61L 31/16 Biologically active materials, e.g. therapeutic substances A61L31/047 takes precedence
• CPC Class Codes: A61L 31/18 Materials at least partially X-ray or laser opaque

Abstract

A bendable polymer tissue fixation device suitable to be implanted into a living body, consisting of a highly porous body, made from a polymer, the porous body having a plurality of pores, such that the device is capable of being smoothly bent, wherein the bending collapses a portion of the pores to form a radius curve, and the polymer fixation device is rigid enough to protect a tissue from shifting. Preferably, the polymer fixation device may be capable of being gradually resorbed by said living body. In one embodiment, the polymer fixation device consists of a plurality of layers distinguishable by various characteristics, such as structural or chemical properties. In another embodiment, the polymer fixation device may feature additional materials which serve to reinforce or otherwise alter the structure or physical characteristics of the device, or alternatively the additional materials serve to deliver therapies to the living being.

Claims

1. A device suitable for implantation into a living body, said device comprising a laminar body, said laminar body having at least a porous first layer and porous second layer, each of said first layer and second layer comprising pores, said first layer further comprising a polymer and whose pores are larger and more easily collapsed than the pores of said second layer;

further wherein at room temperature or above said laminar body having at least one surface that conforms to the shape of an uneven surface upon compressing said device evenly against said uneven surface, wherein said compressing causes the resistance from protruding areas of said uneven surface to predominantly and irreversibly deform and collapse pores of the first layer, thereby causing the surface of the device to take on the inverse shape of the uneven surface without the first layer itself springing back to its original shape upon removal of the compressive force; and

further wherein said device (a) is fastenable to tissue without the use of pre-manufactured holes in said device, and (b) is capable of being gradually resorbed by said living body.

2. The device of claim 1, wherein recessed areas of said uneven surface do not deform or collapse any of the pores.