Bone fracture reduction device and method of internal fixation of bone fractures

• US 4,905,679 A
• Filed: 02/22/1988
• Issued: 03/06/1990
• Est. Priority Date: 02/22/1988
• Status: Expired due to Term

• Current Assignee: Sofamor Danek Properties, Inc. (Medtronic Plc)
• Original Assignee: M P Operation Incorporated
• Inventors: Morgan, Frank H.
• Primary Examiner(s): Hafer, Robert A.
• Assistant Examiner(s): Sam, Charles H.
• Application Number:
  US07/158,686
• Time in Patent Office: 743 Days
• Field of Search: 128/92 C, 128/92 D, 128/92 B, 128/92 EB, 128/92 R, 128/92 YP
• US Class Current: 606/70
• 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: Y10S 227/902 Surgical clips or staples

Abstract

A bone fracture reduction device for the internal fixation and immobilization of bone fragments. The device is comprised of at least two spaced bone affixation plate sections formed of bio-compatible metallic material and at least one leg section of like bio-compatible metallic material interconnecting each pair of the plate sections. Each plate section has at least one screw hole extending therethrough for receiving a bone screw to be driven into a bone fragment and each leg section is of relatively narrow width with respect to the width of the plate sections. The device is affixed via its plate sections to adjacent bone fragments with each leg section spanning a fracture line. Each leg section is deformable after affixation of its connected pair of plate sections to adjacent bone fragments whereby upon kinking deformation thereof the distance between each connected pair of plate sections is reduced and the adjacent bone fragments are compressed to close the fracture line between such plate sections and immobilize the fracture.

Claims

1. A bone fracture reduction device for the internal fixation and immobilization of bone fragments at one or more bone fracture sites comprising:

(a) two or more spaced bone affixation plate sections formed of bio-compatible metallic material and arranged as one or more pairs of plate sections, each of said plate sections having at least one screw hole extending therethrough for receiving a bone screw to be driven into a bone fragment on one side of a bone fracture site to affix each of said plate sections to such bone fragment; and

(b) one leg section of like bio-compatible metallic material interconnecting each pair of plate sections, each leg section being less than half the width of the plate sections to which it is connected and being of uniform cross section throughout its length and each leg section spanning a fracture line between its respective connected pair of plate sections upon affixation of said plate sections to adjacent bone fragments at a fracture site, and each leg section being deformable after affixation of its connected par of plate sections to adjacent bone fragments whereby upon kinking deformation thereof the distance between each connected pair of said plate sections is reduced and the adjacent bone fragments compressed to close the fracture line between said plate sections and immobilize the fracture.

2. A bone fracture reduction device for the internal fixation and immobilization of bone fragments as claimed in claim 1 wherein said device includes two bone affixation plate sections with at least two screw holes extending therethrough and the screw holes of each of said plate sections are in general alignment with the long axis of the leg section of said device which interconnects said plate sections.

3. A bone fracture reduction device for the internal fixation and immobilization of bone fragments as claimed in claim 1 wherein said device includes two terminal bone affixation plate sections with at least two screw holes extending therethrough, an intermediate bone affixation plate section having a single screw hole extending therethrough, and two leg sections with each of said leg sections interconnecting one of said terminal plate sections to said intermediate plate section to form two pairs of plate sections to the bone fracture reduction device.

4. A bone fracture reduction device for the internal fixation and immobilization of bone fragments as claimed in claim 3 wherein the two leg sections of said device are oriented at an acute, right or obtuse angle with respect to one another.

5. A bone fracture reduction device for the internal fixation and immobilization of bone fragments as claimed in claim 1 wherein said device includes three or more bone affixation plate sections with at least two screw holes extending therethrough, a central hub-type bone affixation plate section having a single screw hole extending therethrough, and a leg section interconnecting each of said terminal plate sections with said central plate section to form three or more pairs of plate sections of the bone fracture reduction device.

7. A bone fracture reduction device for the internal fixation and immobilization of bone fragments as claimed in claim 1 wherein each bone affixation plate section and each interconnecting leg section are fabricated of a bio-compatible metal or metallic alloy selected from the group consisting of titanium, titanium alloys, cobalt-chrome alloys and stainless steel.

6. A bone fracture reduction device for the internal fixation and immobilization of bone fragments as claimed in claim i wherein said device includes three or more like bone affixation plate sections arranged as three or more pairs of said plate sections with each of said plate sections having at least one screw hole extending therethrough, each of said pairs of plate sections interconnected by a leg section of equal or unequal length with respect to the leg sections of adjacent like pairs of plate sections whereby said device takes on the form of a closed multiple sided geometrical plane figure.