Lagwire system and method for the fixation of bone fractures

• US 9,060,809 B2
• Filed: 05/31/2011
• Issued: 06/23/2015
• Est. Priority Date: 10/18/2001
• Status: Active Grant

• Current Assignee: OrthoIP, LLC
• Original Assignee: OrthoIP, LLC
• Inventors: Tipirneni, Kishore, Vassello, Wayne
• Primary Examiner(s): Lawson, Matthew
• Assistant Examiner(s): COLEY, ZADE JAMES
• Application Number:
  US13/118,871
• Publication Number:
  US 20110295252A1
• Time in Patent Office: 1,484 Days
• Field of Search: 606300-321, 606 62- 68, 472/195, 442/352, 442/195, 267/290
• US Class Current: 1/1
• CPC Class Codes: A61B 17/62 Ring frames, i.e. devices extending around the bones to be positioned A61B17/6433 , A61B17/66 take precedence
• CPC Class Codes: A61B 17/683 comprising bone transfixation elements, e.g. bolt with a distal cooperating element such as a nut
• CPC Class Codes: A61B 17/685 Elements to be fitted on the end of screws or wires, e.g. protective caps
• CPC Class Codes: A61B 17/7053 with parts attached to bones or to each other by flexible wires, straps, sutures or cables
• CPC Class Codes: A61B 17/72 Intramedullary pins, nails or other devices A61B17/744 takes precedence
• CPC Class Codes: A61B 17/746 the longitudinal elements coupled to a plate opposite the femoral head
• CPC Class Codes: A61B 17/842 Flexible wires, bands or straps A61B17/72, A61B17/82, A61B17/86 take precedence
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61B 17/8605 Heads, i.e. proximal ends projecting from bone
• CPC Class Codes: A61B 17/861 specially shaped for gripping driver
• CPC Class Codes: A61B 17/8625 Shanks, i.e. parts contacting bone tissue
• CPC Class Codes: A61B 17/864 hollow, e.g. with socket or cannulated
• CPC Class Codes: A61B 17/8685 comprising multiple separate parts
• CPC Class Codes: A61B 17/8863 Apparatus for shaping or cutting osteosynthesis equipment by medical personnel
• CPC Class Codes: A61B 17/8869 Tensioning devices
• CPC Class Codes: A61B 17/888 the driver bit acting on the central region of the screw head
• CPC Class Codes: A61B 17/92 Impactors or extractors, e.g. for removing intramedullary devices insertion or extraction of artificial joints A61F2/4603
• CPC Class Codes: A61B 2017/681 Alignment, compression, or distraction mechanisms

Abstract

A lagwire system and method for facilitating the fixation of bone fractures is disclosed. The lagwire system includes an anchor component, a wire, a sleeve and a cap. The sleeve and cap are operable to slide along the length of the wire and also operable to be used to fixate a fracture individually by using a canal prepared by the anchor and wire.

Claims

1. A method for treating a fracture of a bone, said method comprising:

inserting a lagwire system into said bone,

wherein said lagwire system comprises an anchor and a wire;

wherein said wire has a first end and a second end,

wherein said anchor is attached to said first end of said wire,

wherein said anchor includes anchor threads;

wherein a cap is attached to said second end of said wire;

cutting said second end of said wire to a particular length;

fixedly attaching said anchor to a first bone portion;

sliding a flexible sleeve longitudinally over said wire such that said wire is reciprocally received by said flexible sleeve, after said anchor is fixedly attached to said first bone portion,

wherein said flexible sleeve has a first sleeve end and a second sleeve end,

inserting said flexible sleeve into a bone canal that spans across said fracture between said first bone portion and a second bone portion;

cutting said flexible sleeve to a particular length, after said anchor is fixedly attached to said first bone portion;

wherein said flexible sleeve is comprised of an interwoven first coiled fiber and second coiled fiber,

wherein said flexible sleeve is configured to bend while inside said bone canal in any radial direction relative to its centerline into a curved configuration,

wherein said first coiled fiber includes a plurality of coils, and wherein said second coiled fiber includes a plurality of coils,

wherein said first coiled fiber and said second coiled fiber form an outer thread on said sleeve,

threading said outer thread of said sleeve into at least a portion of said bone canal and providing friction against at least a portion of said bone canal;

engaging said flexible sleeve to said anchor to fixedly attach said flexible sleeve to said anchor, after said anchor is fixedly attached to a first bone portion;

wherein said anchor is configured to receive said first sleeve end, such that said anchor threads and said outer threads are contiguous;

wherein said anchor includes tapered threads behind cutting threads, such that said tapered threads are configured to cut into said first sleeve end to secure said first sleeve end to said anchor; and

wherein threads on said cap and said outer threads on said second sleeve end are contiguous.

2. An implant device comprising:

a wire having a first end and a second end,

wherein said second end of said wire is configured to be cut to a particular length;

an anchor attached to said first end of said wire,

wherein said anchor is configured to be fixedly attached to a first bone portion,

wherein said anchor includes anchor threads;

a cap attached to said second end of said wire; and

a flexible sleeve having a first sleeve end and a second sleeve end, wherein said flexible sleeve is configured to slide longitudinally over said wire such that said wire is reciprocally received by said flexible sleeve, after said anchor is fixedly attached to said first bone portion,

wherein said flexible sleeve is configured to be inserted into a bone canal that spans across a fracture between said first bone portion and a second bone portion,

wherein said flexible sleeve is configured to be cut to a particular length, after said anchor is fixedly attached to said first bone portion,

wherein said flexible sleeve is comprised of an interwoven first coiled fiber and second coiled fiber,

wherein said flexible sleeve is configured to bend while inside said bone canal in any radial direction relative to its centerline into a curved configuration,

wherein said first coiled fiber includes a plurality of coils, and wherein said second coiled fiber includes a plurality of coils,

wherein said first coiled fiber and said second coiled fiber form an outer thread on said sleeve,

wherein said outer thread of said sleeve is configured to be threaded into at least a portion of said bone canal and provide friction against at least a portion of said bone canal,

wherein said flexible sleeve is configured to engage said anchor to fixedly attach said flexible sleeve to said anchor, after said anchor is fixedly attached to a first bone portion;

wherein said anchor is configured to receive said first sleeve end, such that said anchor threads and said outer threads are contiguous;

wherein said anchor includes tapered threads behind cutting threads, such that said tapered threads are configured to cut into said first sleeve end to secure said first sleeve end to said anchor; and

wherein threads on said cap and said outer threads on said second sleeve end are contiguous.

3. The implant device of claim 2, wherein said anchor includes external anchor threads.

4. The implant device of claim 3, wherein said flexible sleeve at least partially includes at least one of shape memory material, plastic, polyetherketone (PEEK), steel, titanium or titanium alloy.

5. The implant device of claim 4, wherein said flexible sleeve is configured to allow treatment to be delivered through a center of said flexible sleeve, wherein said treatment includes at least one of a medication, an adhesive, an ultrasonic vibration, or a bonding material.

6. The implant device of claim 5, wherein said flexible sleeve abuts said anchor creating contiguous outside threads along said anchor and said flexible sleeve.

7. The implant device of claim 6, wherein said first coiled fiber and said second coiled fiber are interwoven such that the first coiled fiber engages outside said second coiled fiber, wherein each coil of said first coiled fiber functions as a thread and each coil of said second coiled fiber separates each of the coils of said first coiled fiber.

8. The implant device of claim 7, wherein said cap includes internal threads which mate with said external threads of said flexible sleeve, wherein said cap further comprises a threaded external distal portion which mates with said first bone portion as a screw interface, and wherein said cap is configured to receive said flexible sleeve such that said cap is configured to slide distally along a length of said flexible sleeve, wherein said cap is configured to engage said flexible sleeve such that said sleeve is at least partially restricted from moving distally relative to said cap.

9. The implant device of claim 8, wherein said flexible sleeve further comprises a proximal end that is hexagonal in shape and configured to receive a hexagonal driver.

10. The implant device of claim 9, wherein said flexible sleeve is configured to receive a force in a proximal direction and be placed in tension to force said first bone portion towards said second bone portion.

11. The implant device of claim 10, further comprising a third coiled fiber, a fourth coiled fiber, a fifth coiled fiber and a sixth coiled fiber, wherein said first coiled fiber, said third coiled fiber , and said fifth coiled fiber each have the same cross section, and wherein said second coiled fiber, said fourth coiled fiber, and said sixth coiled fiber have the same cross section.

12. The implant device of claim 11, wherein a proximal portion of said bone canal is larger such that said flexible sleeve does not engage said proximal portion of said bone canal.

13. The implant device of claim 12, wherein said flexible sleeve is cannulated.

14. The implant device of claim 13, wherein posts engage said flexible sleeve from a perpendicular direction.