Surgical fastener assembly

• US 6,183,474 B1
• Filed: 01/29/1999
• Issued: 02/06/2001
• Est. Priority Date: 03/13/1996
• Status: Expired due to Term

• Current Assignee: Orthopedic Designs North America, Inc.
• Original Assignee: Dale G. Bramlet
• Inventors: Sodeika, John, Sterghos, Peter, Bramlet, Dale G.
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): REIP, DAVID OWEN
• Application Number:
  US09/239,862
• Time in Patent Office: 739 Days
• Field of Search: 606/60, 606/61, 606/62, 606/63, 606/64, 606/65, 606/66, 606/67, 606/68, 606/69, 606/70, 606/71, 606/72, 606/73
• US Class Current: 606/66
• CPC Class Codes: A61B 17/1659 Surgical rasps, files, planes, or scrapers
• CPC Class Codes: A61B 17/1721 for applying pins along or parallel to the axis of the femoral neck
• CPC Class Codes: A61B 17/746 the longitudinal elements coupled to a plate opposite the femoral head
• CPC Class Codes: A61B 17/8004 with means for distracting or compressing the bone or bones
• CPC Class Codes: A61B 17/8061 specially adapted for particular bones A61B17/70 and A61B17/74 take precedence
• CPC Class Codes: A61B 17/809 with bone-penetrating elements, e.g. blades or prongs bone staples A61B17/0642; intramedullary nails with a plate at an end A61B17/7233
• CPC Class Codes: A61B 17/864 hollow, e.g. with socket or cannulated
• CPC Class Codes: A61B 17/8875 Screwdrivers, spanners or wrenches
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable
• CPC Class Codes: A61B 2017/00862 elastic or resilient
• CPC Class Codes: A61B 2017/0412 having anchoring barbs or pins extending outwardly from suture anchor body
• CPC Class Codes: A61B 2017/0425 the anchor or the separate member comprising threads, e.g. a set screw in the anchor
• CPC Class Codes: A61B 2017/0429 the barbs being expanded by a mechanical mechanism which also locks them in the expanded state
• CPC Class Codes: A61B 2017/0433 the anchor or the separate member comprising threads, e.g. a set screw or a worm gear for moving spreading members
• CPC Class Codes: A61B 2017/044 with a threaded shaft, e.g. screws
• CPC Class Codes: A61B 2017/8655 with special features for locking in the bone
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• CPC Class Codes: A61F 2/3601 for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices non-prosthetic internal fixation devices for the femoral head or neck A61B17/74
• CPC Class Codes: A61F 2/4241 for hands, e.g. fingers
• CPC Class Codes: A61F 2/4606 of wrists or ankles; of hands, e.g. fingers; of feet, e.g. toes
• CPC Class Codes: A61F 2002/30112 : Rounded shapes, e.g. with rounded corners
• CPC Class Codes: A61F 2002/30131 : horseshoe- or crescent- or C-shaped or U-shaped
• CPC Class Codes: A61F 2002/30143 : hexagonal
• CPC Class Codes: A61F 2002/30153 : rectangular
• CPC Class Codes: A61F 2002/30154 : square
• CPC Class Codes: A61F 2002/3021 : frustoconical
• CPC Class Codes: A61F 2002/30217 : hollow cones, e.g. tubular-like cones
• CPC Class Codes: A61F 2002/30224 : cylindrical
• CPC Class Codes: A61F 2002/30235 : tubular, e.g. sleeves
• CPC Class Codes: A61F 2002/30276 : frustopyramidal
• CPC Class Codes: A61F 2002/30332 : Conically- or frustoconically-shaped protrusion and recess
• CPC Class Codes: A61F 2002/30359 : Pyramidally- or frustopyramidally-shaped protrusion and recess
• CPC Class Codes: A61F 2002/30405 : made by screwing complementary threads machined on the parts themselves
• CPC Class Codes: A61F 2002/30433 : using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• CPC Class Codes: A61F 2002/30487 : Circumferential cooperating grooves and beads on cooperating lateral surfaces of a mainly longitudinal connection
• CPC Class Codes: A61F 2002/305 : Snap connection
• CPC Class Codes: A61F 2002/30525 : Worm gears
• CPC Class Codes: A61F 2002/30571 : Leaf springs
• CPC Class Codes: A61F 2002/30574 : with an integral complete or partial collar or flange
• CPC Class Codes: A61F 2002/30579 : with mechanically expandable devices, e.g. fixation devices
• CPC Class Codes: A61F 2002/30616 : Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/30624 : Hinged joint, e.g. with transverse axle restricting the movement
• CPC Class Codes: A61F 2002/30632 : with rotation-limiting stops, e.g. projections or recesses
• CPC Class Codes: A61F 2002/30772 : Apertures or holes, e.g. of circular cross section
• CPC Class Codes: A61F 2002/30774 : internally-threaded
• CPC Class Codes: A61F 2002/30795 : Blind bores, e.g. of circular cross-section
• CPC Class Codes: A61F 2002/30805 : Recesses of comparatively large area with respect to their low depth
• CPC Class Codes: A61F 2002/3085 : with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
• CPC Class Codes: A61F 2002/4243 : for interphalangeal joints, i.e. IP joints
• CPC Class Codes: A61F 2220/0025 : Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0033 : made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2220/0041 : using additional screws, bolts, dowels or rivets, e.g. connecting screws
• CPC Class Codes: A61F 2230/0004 : Rounded shapes, e.g. with rounded corners
• CPC Class Codes: A61F 2230/0013 : Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2230/0017 : Angular shapes
• CPC Class Codes: A61F 2230/0019 : rectangular
• CPC Class Codes: A61F 2230/0021 : square
• CPC Class Codes: A61F 2230/0067 : conical
• CPC Class Codes: A61F 2230/0069 : cylindrical
• CPC Class Codes: A61F 2230/0086 : Pyramidal, tetrahedral, or wedge-shaped
• CPC Class Codes: A61F 2310/00017 : Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00029 : Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
• CPC Class Codes: A61F 2310/00179 : Ceramics or ceramic-like structures
• CPC Class Codes: Y10S 606/902 : Cortical plate specifically adapted for a particular bone
• CPC Class Codes: Y10S 606/907 : Composed of particular material or coated

Abstract

A surgical fastener assembly for coupling first and second bone portions across a fracture therebetween is disclosed. In one embodiment of the present invention, the surgical fastener assembly includes an anchor that has a first externally threaded portion disposed in the first bone portion and a second portion which is at least partially disposed in the second bone portion. At least one pin is operably associated with the first portion of the anchor such that when the pin is in a retracted position the pin is disposed within the anchor and when the pin is in an extended position at least a portion of the pin extends outward from the anchor. An actuator is disposed within the anchor and is operably coupled with the at least one pin. A guide is adapted to be fixedly secured to the second bone portion and includes a sleeve. The second portion of the anchor is received within the sleeve. A fastener is provided that has a head portion and an externally threaded shank portion. The shank portion threadedly engages with the anchor and the head portion operably engages with the guide.

Claims

1. A surgical fastener assembly for coupling first and second bone portions across a fracture therebetween, comprising

an anchor, said anchor including a first externally threaded portion adapted to be disposed in the first bone portion and a second portion which is adapted to be at least partially disposed in the second bone portion;

at least one pin operably associated with said first portion of said anchor, wherein when said pin is in a retracted position said pin is disposed within said anchor and wherein when said pin is in an extended position at least a portion of said pin extends outward from said anchor;

an actuator, said actuator disposed within said anchor and operably coupled with said at least one pin;

a guide, said guide adapted to be fixedly secured to the second bone portion and including a sleeve, said second portion of said anchor received within said sleeve; and

a fastener, said fastener including a head portion and an externally threaded shank portion wherein said shank portion threadedly engages with said anchor and said head portion operably engages with said guide.

2. The surgical fastener assembly of claim 1 wherein said at least one pin has an arcuate configuration.

3. The surgical fastener assembly of claim 1 wherein said at least one pin extends from a base, said base defining an internally threaded bore and said base movably disposed within said first portion of said anchor.

4. The surgical fastener assembly of claim 3 wherein said actuator is externally threaded along a first portion thereof and wherein said first portion of said actuator is threadedly coupled to said internally threaded bore of said base.

5. The surgical fastener assembly of claim 3 wherein a plurality of pins extend from said base.

6. A surgical fastener assembly comprising:

an anchor, said anchor including external threading extending along a first portion thereof and said anchor defining a longitudinal bore and at least one slot;

at least one pin operably associated with said first portion of said anchor, wherein when said pin is in a retracted position said pin is disposed within said longitudinal bore of said anchor and wherein when said pin is in an extended position at least a portion of said pin extends outward from said anchor through said slot;

an actuator, said actuator disposed within said bore of said anchor and operably coupled with said at least one pin;

a guide, said guide including a sleeve, a second portion of said anchor received within said sleeve; and

a fastener, said fastener threadedly engaged within said bore of said anchor and operably engaged with said guide.

7. The surgical fastener assembly of claim 6 wherein said at least one pin has an arcuate configuration.

8. The surgical fastener assembly of claim 6 wherein said at least one pin extends from a base, said base defining an internally threaded bore and said base movably disposed within said longitudinal bore of said anchor.

9. The surgical fastener assembly of claim 8 wherein said actuator is externally threaded along a first portion thereof and wherein said first portion of said actuator is threadedly coupled to said internally threaded bore of said base.

10. The surgical fastener assembly of claim 6 wherein said at least one pin is formed from a deformable material.

11. The surgical fastener assembly of claim 6 further comprising a retainer, at least a portion of said retainer positioned between structure defining said longitudinal bore of said anchor and said fastener.

12. The surgical fastener assembly of claim 11 wherein said retainer is inserted within said fastener and wherein said retainer is formed of a deformable material.

13. A method of coupling a first bone portion to a second bone portion across a fracture therebetween comprising the steps of:

threading a first portion of an anchor into the first bone portion, said first anchor portion including external threading and said anchor including a second portion disposed within the second bone portion;

attaching a guide to the second bone portion, said guide including a sleeve;

positioning said second portion of said anchor within said sleeve;

extending a pin from said anchor such that said pin enters the first bone portion; and

drawing said guide into a compressive relationship with said anchor.

14. The method of claim 13 wherein said step of extending a pin from said anchor comprises the step of threading an actuator into a pin assembly, said pin assembly including a base which defines an internally threaded bore and wherein said pin extends from said base, said actuator threaded into said bore.

15. The method of claim 13 wherein said step of extending a pin from said anchor comprises the step of deforming said pin as said pin is extended from said anchor.

16. The method of claim 13 wherein said step of drawing said guide into a compressive relationship with said anchor comprises the step of threading a compression screw into said anchor, said compression screw including a threaded shank portion and a head portion, said shank portion threaded into said anchor and said head portion operably coupled to said guide.

17. The method of claim 16 further comprising the step of locking said threaded shank portion of said compression screw within said anchor.

18. The method of claim 17 wherein said step of locking said threaded shank portion of said compression screw within said anchor includes the step of inserting a deformable insert within said shank portion of said compression screw.

19. The method of claim 13 wherein said pin has an arcuate shape.