CA2444914A1 - Fermoral nail intamedullary system - Google Patents

Fermoral nail intamedullary system Download PDF

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Publication number
CA2444914A1
CA2444914A1 CA002444914A CA2444914A CA2444914A1 CA 2444914 A1 CA2444914 A1 CA 2444914A1 CA 002444914 A CA002444914 A CA 002444914A CA 2444914 A CA2444914 A CA 2444914A CA 2444914 A1 CA2444914 A1 CA 2444914A1
Authority
CA
Canada
Prior art keywords
intramedullary
bore
radial
axial bore
lag screw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002444914A
Other languages
French (fr)
Other versions
CA2444914C (en
Inventor
Dale G. Bramlet
Patrick J. Cosgrove
John A. Sodeika
Peter M. Sterghos
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Orthopedic Designs North America Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2444914A1 publication Critical patent/CA2444914A1/en
Application granted granted Critical
Publication of CA2444914C publication Critical patent/CA2444914C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/74—Devices for the head or neck or trochanter of the femur
    • A61B17/742—Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck
    • A61B17/744—Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck the longitudinal elements coupled to an intramedullary nail
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/72—Intramedullary pins, nails or other devices
    • A61B17/7233—Intramedullary pins, nails or other devices with special means of locking the nail to the bone
    • A61B17/725—Intramedullary pins, nails or other devices with special means of locking the nail to the bone with locking pins or screws of special form
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/72—Intramedullary pins, nails or other devices
    • A61B17/7233—Intramedullary pins, nails or other devices with special means of locking the nail to the bone
    • A61B17/7258—Intramedullary pins, nails or other devices with special means of locking the nail to the bone with laterally expanding parts, e.g. for gripping the bone
    • A61B17/7266—Intramedullary pins, nails or other devices with special means of locking the nail to the bone with laterally expanding parts, e.g. for gripping the bone with fingers moving radially outwardly
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S606/00—Surgery
    • Y10S606/916—Tool for installing or removing orthopedic fastener

Abstract

An intramedullary system for securing portions of a bone together has a lag screw assembly extending through a radial bore in an intramedullary nail. Th e lag screw is inserted into one portion of a bone and deployed to fix the leading end. The intramedullary nail is placed in the intramedullary canal o f a portion of the bone and the trailing end of the lag screw assembly is adjustably fixed in the radial bore to provide compression between the lag screw assembly and the intramedullary nail. The intramedullary nail has a ca p screw in the proximal end holding the lag screw assembly and a tang in the distal end. The tang has legs extending through the nail to fix the distal e nd in the intramedullary canal.

Claims (21)

1. ~An intramedullary system having a lag screw assembly in combination with an intramedullary nail, for implantation in the intramedullary canal of a long bone, said intramedullary nail comprising an elongated body with a proximal end and a distal end, said proximal end having at least one radial bore, said lag screw assembly extending through said radial bore an adjustable distance, said lag screw assembly and said intramedullary nail including cooperating structure for adjusting and fixing said distance, wherein said distal end has a plurality of radial bores disposed therein, an anchoring device is adapted to be disposed in at least one of said plurality of radial bores and wherein said elongated body is cannulated with an axial bore at said proximal end and an axial bore at said distal end, said anchoring device disposed in said axial bore at said distal end, said anchoring device including at least one tang adapted to extend through at least one of said plurality of radial holes.
2. An intramedullary system of claim 1 wherein a plurality of radial bores are disposed in said distal end.
3. An intramedullary system of claim 2 wherein an anchoring device is adapted to be disposed in at least one of said plurality of radial bores.
4. An intramedullary system of claim 3 wherein said anchoring device is a cortical screw adapted to penetrate said long bone and extend through said at least one radial bore.

18~
5. ~An intramedullary system of claim 3 wherein said elongated body is cannulated with an axial bore at said proximal end and an axial bore at said distal end, said anchoring device disposed in said axial bore at said distal end, said anchoring device including at least one tang adapted to extend through at least one of said plurality of said radial bores.
6. ~An intramedullary system of claim 5 wherein said leading end of said lag screw assembly includes external bone screw threads for fixed engagement in said bone.
7. ~An intramedulllary system of claim 5 wherein said leading end of said lag screw assembly includes an internal tang and an aperture, said tang adapted to extend through said aperture for fixed engagement in said bone.
8. An intramedullary system of claim 7 wherein said leading end of said lag screw assembly includes external bone screw threads for fixed engagement in said bone.
9. An intramedullary system of claim 5 wherein said structure for securing said trailing end of said lag screw to said intramedullary nail comprises screw threads on said trailing end of said lag screw and a compression screw adapted for cooperating therewith.
10. An intramedullary system of claim 5 wherein an axial bore extends from said radial bore through said proximal end, an end cap securely fastened in said axial bore frictionally contacting said structure for securing said trailing end of said lag screw assembly.
11. An intramedullary system of claim 10 wherein said structure for securing said trailing end includes a sleeve surrounding said trailing end and disposed in said radial bore, said trailing end slidable within said sleeve, said end cap fractionally contacting said sleeve and securing said sleeve in said radial bore.
12. An intramedullary system of claim 11 wherein said structure for securing said trailing end includes screw threads on said trailing end and a compression screw inserted within said sleeve and cooperating with said screw threads to apply compression between said sleeve and said leading end of said lag screw assembly.
13. An intramedullary system comprising a lag screw assembly in combination with an intramedullary nail, said lag screw assembly and said intramedullary nail sized and shaped for insertion into a long bone, said intramedullary nail having a proximal end with an axial bore, a distal end with an axial bore, said axial bores extending from said proximal end through said distal end, said proximal end having a radial bore, said lag screw assembly adapted to adjustably traverse said radial bore, said distal end having at least one radial bore, a tang assembly slidably disposed in said distal end of said axial bore, said tang assembly having at least one tang adapted to extend through said at least one radial bore in said distal end whereby sliding movement of said tang assembly extends said tang through said radial bore.
14. An intramedullary system of claim 13 wherein said at least one tang is curved in the extended position.
15. An intramedullary system of claim 13 wherein said distal end has a plurality of radial bores and said tang assembly has a plurality of tangs adapted to extend through said plurality of radial bores.
16. An intramedullary system of claim 13 wherein said axial bore of said proximal end of said intramedullary nail and said axial bore of said distal end intersect at an angle approximating anatomical shape.
17. An intramedullary system of claim 16 wherein an insertion/deployment/retraction instrument is slidably disposed in said proximal axial bore and said distal axial bore, said instrument connected to said tang assembly whereby manipulation of said instrument slidably moves said tang assembly and deploys said tangs.
18. An intramedullary system of claim 16 wherein said radial bore in said proximal end has an axis, said axis of said radial bore intersecting said axial bore of said proximal end at an angle to allow proper positioning of said lag screw assembly in said bone.
19. An intramedullary system kit comprising a lag screw assembly, an intramedullary nail, a tang assembly with resilient tangs, cortical screws, a sleeve, a compression screw, an end cap and an insertion/deployment/retraction instrument, said lag screw assembly having a leading end and a trailing end, said leading end having attachment means for connecting said leading end to a portion of a bone, said intramedullary nail having a proximal end and a distal end, an axial bore through said proximal end and said distal end, a radial bore in said proximal end, and a plurality of radial bores in said distal end, said tang assembly slidably disposed in said axial bore of said distal end, said instrument disposed in said intramedullary nail proximal axial bore and distal axial bore and connected to said tang assembly, said instrument adapted to slide said tang assembly to deploy said tangs through said radial bores in said distal end into said bone, said cortical screws adapted to be inserted through said radial bores in said distal end, said radial bore in said proximal end sized to permit passage of said leading end of said lag screw assembly, said lag screw assembly adapted to extend through said radial bore in said proximal end with said trailing end disposed in said axial bore, said sleeve sized to extend through said radial bore in said proximal end and slidably surround said trailing end of said lag screw assembly, said end cap adapted for connection with said axial bore in said proximal end of said nail and engage said sleeve for fixing said sleeve in said radial bore, said compression screw adapted to be connected with the trailing end of said lag screw assembly and said radial bore of said proximal end whereby manipulation of said compression screw will apply compression between said intramedullary nail and said lag screw assembly.
20. A method of fixing portions of a bone together comprising the steps of providing an intramedullary system having a lag screw assembly for adjustable connection to an intramedullary nail by a compression screw, said intramedullay nail having a proximal end with an axial bore, a distal end with an axial bore, a radial bore in said proximal end, and a plurality of radial bores in said distal end, said lag screw assembly sized to traverse said radial bore in said proximal end, a cap screw in said axial bore of said proximal end, said cap screw for fractionally engaging and securing said lag screw assembly in said radial bore, an anchoring device sl disposed in said axial bore of said distal end, inserting said intramedullary nail in said intramedullary canal of a portion of the bone, traversing said anchoring device through said radial bores in said distal end into said portion of said bone, traversing said lag screw assembly through said radial bore in said proximal end, deploying said lag screw in another portion of the bone, inserting said cap screw in said axial bore of said proximal end, and adjstably connecting said lag screw assembly and said intramedullary nail with said compression screw to gain compression between said lag screw assembly and said intramedullary nail.
21. A method of fixing portions of a bone together comprising the steps of providing an intramedullary system having a lag screw assembly for adjustable connection to an intramedullary nail by a compression screw, said intramedullary nail having a proximal end with an axial bore, a distal end with an axial bore, a radial bore in said proximal end, and a plurality of radial bores in said distal end, said lag screw assembly sized to traverse said radial bore in said proximal end, a cap screw in said axial bore of said proximal end, said cap screw for fractionally engaging and securing said lag screw assembly in said radial bore, an anchoring device disposed in said axial bore of said distal end, wherein said anchoring device further comprises a tang assembly slidably disposed in said axial bore of said distal end, said tang assembly having resilient tangs for traversing said radial bores in said distal end and engaging said portion of bone and an instrument for sliding said tang assembly, inserting said intramedullary nail in said intramedullary canal of a portion of the bone, traversing said anchoring device through said radial bore in said proximal end, traversing said lag screw assembly through said radial bore is said proximal end, deploying said lag screw in another portion of the bone, inserting said instrument through said proximal end axial bore and said distal end axial bore to connect with said tang assembly, manipulating said instrument to slide said tang assembly to cause said tangs to traverse said radial bores and engage said portion of said bone, removing said instrument, inserting said cap screw in said axial bore of said proximal end, and adjustably connecting said lag screw assembly and said intramedullary nail with said compression screw to gain compression between said lag screw assembly and said intramedullary nail.
CA2444914A 2001-04-24 2002-04-23 Fermoral nail intamedullary system Expired - Fee Related CA2444914C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/841,851 2001-04-24
US09/841,851 US6443954B1 (en) 2001-04-24 2001-04-24 Femoral nail intramedullary system
PCT/US2002/015245 WO2002085219A2 (en) 2001-04-24 2002-04-23 Fermoral nail intamedullary system

Publications (2)

Publication Number Publication Date
CA2444914A1 true CA2444914A1 (en) 2002-10-31
CA2444914C CA2444914C (en) 2011-06-21

Family

ID=25285846

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2444914A Expired - Fee Related CA2444914C (en) 2001-04-24 2002-04-23 Fermoral nail intamedullary system

Country Status (6)

Country Link
US (1) US6443954B1 (en)
EP (1) EP1414359A2 (en)
JP (1) JP2005509453A (en)
AU (1) AU2002309801B2 (en)
CA (1) CA2444914C (en)
WO (1) WO2002085219A2 (en)

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EP1414359A2 (en) 2004-05-06
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