WO2002045592A9 - Dispositif de retenue d'implant - Google Patents

Dispositif de retenue d'implant

Info

Publication number
WO2002045592A9
WO2002045592A9 PCT/US2001/043024 US0143024W WO0245592A9 WO 2002045592 A9 WO2002045592 A9 WO 2002045592A9 US 0143024 W US0143024 W US 0143024W WO 0245592 A9 WO0245592 A9 WO 0245592A9
Authority
WO
WIPO (PCT)
Prior art keywords
plate
implant
recited
retaining device
bone
Prior art date
Application number
PCT/US2001/043024
Other languages
English (en)
Other versions
WO2002045592A2 (fr
WO2002045592A3 (fr
Inventor
John W Morris
Lawrence A Shimp
David R Kaes
Original Assignee
Osteotech Inc
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 Osteotech Inc filed Critical Osteotech Inc
Priority to AU2002243211A priority Critical patent/AU2002243211A1/en
Publication of WO2002045592A2 publication Critical patent/WO2002045592A2/fr
Publication of WO2002045592A3 publication Critical patent/WO2002045592A3/fr
Publication of WO2002045592A9 publication Critical patent/WO2002045592A9/fr

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
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7059—Cortical plates
    • 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
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • 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
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00831—Material properties
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/28—Bones
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30721—Accessories
    • A61F2/30749—Fixation appliances for connecting prostheses to the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/442—Intervertebral or spinal discs, e.g. resilient
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
    • A61F2/446—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages having a circular or elliptical cross-section substantially parallel to the axis of the spine, e.g. cylinders or frustocones
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
    • A61F2/447—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/28—Bones
    • A61F2002/2817—Bone stimulation by chemical reactions or by osteogenic or biological products for enhancing ossification, e.g. by bone morphogenetic or morphogenic proteins [BMP] or by transforming growth factors [TGF]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30772—Apertures or holes, e.g. of circular cross section
    • A61F2002/3079—Stepped or enlarged apertures, e.g. having discrete diameter changes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0008—Fixation appliances for connecting prostheses to the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00179—Ceramics or ceramic-like structures
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00359—Bone or bony tissue

Definitions

  • the present disclosure is directed to an implant retaining device for preventing an implant
  • the present disclosure is directed to an implant retaining device particularly suited for retaining an
  • intervertebral implant in a receiving bed formed between adjacent vertebrae.
  • the spine is a flexible column formed of a series of bone called vertebrae.
  • the vertebrae are hollow and piled one upon the other, forming a strong hollow column for support of the
  • the hollow core of the spine houses and protects the nerves of the spinal
  • the vertebrae are connected together by means of articular processes and intervertebral, fibro-cartilages.
  • intervertebral fibro-cartilages are also known as intervertebral disks and are made of a fibrous ring filled with pulpy material.
  • the disks function as spinal shock absorbers and also
  • one or more disks degenerate through trauma, spondylolisthesis or other pathologies, nerves passing near the affected area may be compressed and are consequently irritated. The result may be chronic and/or debilitating back pain.
  • Various methods and apparatus, both surgical and non- surgical, have been designed to relieve such back pain.
  • interbody spinal fusion One method designed to relieve such back pain is interbody spinal fusion.
  • interbody spinal fusion involves distracting adjoining vertebrae of the spine so that the nerve root canal sizes are increased and nerve irritation is eliminated or reduced.
  • at least one intervertebral implant is inserted into a receiving bed formed in the disk space between the adjoining vertebrae.
  • the implant is positioned to engage the adjoining vertebrae to maintain the vertebrae at a fixed degree of distraction.
  • the implant should become fused to adjoining vertebrae in order to prevent the implant and adjoining vertebrae from moving.
  • the implant must also provide spinal load support between the vertebrae. Further, during the time it takes for fusion, i.e., biological fixation of the
  • the implant should have enough structural integrity to maintain the
  • the implant may include or be provided with a bone growth material.
  • the material from which the implant is constructed should be a biocompatible
  • vertebral implant must be fixedly positioned in relation to the adjoining vertebrae during the entire
  • a variety of different devices have been developed to retain an intervertebral implant at a fixed position within the intervertebral space. These devices include, inter alia, screws and formations formed on the implant itself. Such devices often inhibit insertion of the implant into
  • an improved implant retaining device which is configured to reduce the likelihood of expulsion or retropulsion of an intervertebral implant from between
  • an implant retaining device which prevents expulsion of an intervertebral implant from an intervertebral receiving bed.
  • the plate may have a rectangular, circular, or any other configuration capable of performing the intended function of preventing expulsion of an intervertebral implant from the receiving bed.
  • the plate can be secured to one or both vertebral bodies to prevent the intervertebral
  • the plate may be dimensioned to cover a portion of the opening of a receiving bed, and thus, need only be secured to a single vertebral body. Alternately, the plate may be dimensioned to extend entirely across the disc space and may be
  • the plate When the plate is formed from bone, it may be partially or fully demineralized. Partially demineralized bone provides a degree of flexibility to the plate such that it can be manipulated to conform to the surface to which it is secured, e.g., the vertebrae. Demineralization also improves the osteoconductive and osteoconductive characteristics of the plate.
  • the plate may be used in surgical procedures other than spinal interbody fusion procedures.
  • the plate may be used during bone fracture correction procedures to prevent a bone screw from backing out of engagement with adjacent bone sections.
  • Also disclosed herein is a method of retaining an intervertebral implant in a receiving bed using the disclosed implant retaining device.
  • the method includes attaching a plate, dimensioned to cover at least a portion of the receiving bed, to a vertebral body and securing the upper portion of the plate to the vertebral body utilizing at least one screw.
  • the method includes
  • FIG. 1 A is a perspective view of one preferred embodiment of the presently disclosed
  • FIG. IB is a perspective view of another preferred embodiment of the presently disclosed implant retaining device having a rectangular configuration and a curvature along its transverse
  • FIG. 1C is a top view of another preferred embodiment of the presently disclosed implant retaining device having a circular configuration
  • FIG. ID is a perspective view of another preferred embodiment of the presently disclosed
  • FIG. 2 is a front view of the implant retaining device shown in FIG. 1A secured to a
  • FIG. 3 is a side view of the implant retaining device shown in FIG. 1 A secured to a
  • vertebral body with a bone screw to retain a concave implant between adjacent vertebral bodies;
  • FIG. 4 is a side view of the implant retaining device shown FIG. 1A secured to a vertebral body with a bone screw to retain a cylindrical dowel between adjacent vertebral bodies;
  • FIG. 5 is a side view of the implant retaining device shown in FIG. 1 A utilized in a bone
  • FIG. 6 is a cross-sectional view of another embodiment of the presently disclosed implant retaining device having a stepped bore configured to receive the head of a bone screw.
  • DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Preferred embodiments of the presently disclosed implant retaining device will now be described in detail with reference to the drawings in which like reference numerals designate identical or corresponding elements in each of the several views.
  • the implant retaining device of the present invention is intended to be attached to at least ' ' '
  • the implant retaining device is especially suited for procedures where it would be desirable to prevent an implant from backing out of the spine.
  • the device may be used predominately in the lumbar and thoracic regions of
  • the spine but, is adaptable for use in the cervical spine and other regions of the body as well.
  • the implant retaining device described herein may be formed of any biocompatible material or combination of materials.
  • Biocompatible means that no serious systemic toxicity is caused by the presence of the material in a living system. It is contemplated that biocompatible materials may cause some clinically acceptable amounts of toxicity including irritation and/or other adverse reactions in certain individuals.
  • the material described in U.S. Pat. No. 5,899,939, the contents of which are incorporated herein by reference, may be entirely suitable for fabricating all or a portion of the implant retaining device described herein.
  • the implant retaining device may also be fabricated from any of the various biocompatible materials
  • biocompatible polymers suitable for use herein would include bioabsorbable polymeric materials such as, for example, polymers and/or copolymers containing
  • any of the following polymerizable monomers epsilon-caprolactone, glycolide, trimethylene carbonates, tetramethylene carbonates, dimethyl trimethylene carbonates; dioxanones;
  • dioxepanones absorbable cyclic amides; absorbable cyclic ether-esters derived from crown ethers; hydroxyacids capable of esterification, including both alpha hydroxyacids (such as glycolic acid
  • implant retaining device may also be fabricated from metallic materials commonly used in the fabrication of implantable devices, for example, surgical stainless steel, titanium,
  • Ceramic materials such as, hydroxyapatite, bioglass, etc., may also be used
  • implant retaining device 10 includes a plate 12 having at least
  • Plate 12 may vary in
  • the thickness of plate 12 may also vary depending on whether the implant retaining device is adapted for use in the lumbar, thoracic or cervical spinal regions, or other regions of the body.
  • the thickness of plate 12 may vary from at least about .5
  • plate 12 is between about 2 mm to about 5 mm.
  • Plate 12 can be formed from any biocompatible material having the requisite strength requirements including, as
  • plate 12 is constructed from cortical bone.
  • Plate 12 may have a rectangular configuration (FIG. 1 A), a circular configuration (FIG. IC), a rod shaped configuration (FIG. ID), or any other
  • Plate 12 may also be any configuration capable of performing the intended function described herein.
  • Plate 12 may also be any configuration capable of performing the intended function described herein.
  • Plate 12 may also be any configuration capable of performing the intended function described herein.
  • Plate 12 may also be any configuration capable of performing the intended function described herein.
  • Plate 12 may also be any configuration capable of performing the intended function described herein.
  • Plate 12 may also be any configuration capable of performing the intended function described herein.
  • Plate 12 may also be any configuration capable of performing the intended function described herein.
  • plate 12 is suitable for use in preventing an intervertebral implant
  • Intervertebral implants include cylindrical dowels (FIG. 4), wedge-shaped implants, rectangular spacers, concave or convex implants (FIG. 3), etc.
  • the intervertebral implant 20 is placed between adjacent vertebral bodies to support the vertebral bodies at a desired orientation and spacing to facilitate spinal fusion. Such procedures are well known in the art and will not be discussed in further detail herein.
  • plate 12 can be secured to one or both of the vertebral bodies 24 and 26 to prevent implant 20 from backing out of receiving bed 22. As illustrated, plate 12 need only be dimensioned to cover a
  • plate 12 may be dimensioned to extend entirely across the disc space and may be secured to one or both of the vertebral bodies (not shown).
  • plate 12 When plate 12 is formed from bone, it may be partially or fully demineralized using, for
  • Plate 12 may be partially demineralized to provide a degree of flexibility to the plate such that it can be manipulated to conform to the surface to which it is secured, e.g., the vertebrae. Alternately, plate 12 may be partially demineralized to increase the osteoinductive characteristics of the plate. For example, the surface of the plate to be secured adjacent to a vertebral surface may be surface demineralized to promote osteogenic growth.
  • plate 12 may be used in surgical procedures other than spinal interbody fusion procedures.
  • plate 12 may be used to prevent a bone screw 30 from
  • plate 12 can be affixed over the head 44 of the bone screw 30 to prevent the bone screw 30 from backing out of the insertion bore.
  • a single screw 16 can be
  • plate 12 to bone section 42, or bone sections 40 and 42, e.g., one screw at each end of plate 12.
  • the screw 16 and/or bone screw 30 can be formed from any biocompatible material
  • screws 16 and 30 are formed from
  • plate 12 is attached to one or more vertebral bodies 24 and 26 to prevent an intervertebral implant from backing out of an intervertebral receiving bed.
  • the plate is dimensioned to cover at least a portion of the opening to the receiving bed and may extend over the entire receiving bed opening.
  • the plate may be secured to one or both of the vertebral bodies using a bone screw or screws.
  • other fastening techniques may be used to secure the plate to the vertebral body or bodies, e.g., nails, adhesives, pins, etc..
  • the plate 12 may be constructed having a variety of configurations
  • multiple plates may be used simultaneously, i.e., one plate may extend from each side of the graft site. Further, the plate may include a stepped bore 15 formed about throughbore 14 to receive the head 17 of the screw 16. See FIG. 6. Therefore, the above description should not be construed as limiting,

Abstract

L'invention concerne un dispositif de retenue d'implant qui permet d'éviter qu'un implant intervertébral ne sorte du lit de réception. Ce dispositif de retenue d'implant comprend généralement une plaque ayant au moins un trou destiné à recevoir une vis et une vis servant à fixer la plaque sur les vertèbres. La plaque peut être dimensionnée pour couvrir une partie de l'ouverture d'un lit de réception et, par conséquent, n'a besoin d'être fixée qu'à un seul corps vertébral. Dans une variante, la plaque peut être utilisée pendant des opérations de correction de fracture osseuse afin d'éviter qu'une vis à os ne sorte de sa position de contact avec les parties osseuses adjacentes. L'invention concerne également un procédé permettant de retenir un implant intervertébral au moyen dudit dispositif.
PCT/US2001/043024 2000-10-20 2001-10-22 Dispositif de retenue d'implant WO2002045592A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002243211A AU2002243211A1 (en) 2000-10-20 2001-10-22 Implant retaining device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US24205100P 2000-10-20 2000-10-20
US60/242,051 2000-10-20

Publications (3)

Publication Number Publication Date
WO2002045592A2 WO2002045592A2 (fr) 2002-06-13
WO2002045592A3 WO2002045592A3 (fr) 2002-11-21
WO2002045592A9 true WO2002045592A9 (fr) 2003-02-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/043024 WO2002045592A2 (fr) 2000-10-20 2001-10-22 Dispositif de retenue d'implant

Country Status (2)

Country Link
AU (1) AU2002243211A1 (fr)
WO (1) WO2002045592A2 (fr)

Families Citing this family (6)

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US20040210310A1 (en) * 2002-12-10 2004-10-21 Trieu Hai H. Implant system and method for intervertebral disc augmentation
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US7914561B2 (en) 2002-12-31 2011-03-29 Depuy Spine, Inc. Resilient bone plate and screw system allowing bi-directional assembly
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WO2002045592A3 (fr) 2002-11-21
AU2002243211A1 (en) 2002-06-18

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