WO1996037170A1 - Höhenverstellbarer wirbelkörperersatz - Google Patents

Höhenverstellbarer wirbelkörperersatz Download PDF

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Publication number
WO1996037170A1
WO1996037170A1 PCT/EP1996/002092 EP9602092W WO9637170A1 WO 1996037170 A1 WO1996037170 A1 WO 1996037170A1 EP 9602092 W EP9602092 W EP 9602092W WO 9637170 A1 WO9637170 A1 WO 9637170A1
Authority
WO
WIPO (PCT)
Prior art keywords
height
vertebral body
body replacement
parts
edge
Prior art date
Application number
PCT/EP1996/002092
Other languages
English (en)
French (fr)
Inventor
Lutz Biedermann
Jürgen Harms
Original Assignee
Lutz Biedermann
Harms Juergen
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7762786&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1996037170(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Lutz Biedermann, Harms Juergen filed Critical Lutz Biedermann
Priority to DE59608379T priority Critical patent/DE59608379D1/de
Priority to EP96916090A priority patent/EP0828463B1/de
Priority to US08/952,908 priority patent/US5989290A/en
Priority to AT96916090T priority patent/ATE209883T1/de
Priority to JP53534396A priority patent/JP3827326B2/ja
Priority to HU9801916A priority patent/HU219723B/hu
Publication of WO1996037170A1 publication Critical patent/WO1996037170A1/de

Links

Classifications

    • 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
    • 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
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2/4611—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of spinal prostheses
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30138—Convex polygonal shapes
    • A61F2002/30148—Convex polygonal shapes lozenge- or diamond-shaped
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/30199—Three-dimensional shapes
    • A61F2002/30224—Three-dimensional shapes cylindrical
    • A61F2002/30235—Three-dimensional shapes cylindrical tubular, e.g. sleeves
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
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    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30362—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit with possibility of relative movement between the protrusion and the recess
    • A61F2002/3037—Translation along the common longitudinal axis, e.g. piston
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    • 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
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    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30405—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by screwing complementary threads machined on the parts themselves
    • A61F2002/30411—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by screwing complementary threads machined on the parts themselves having two threaded end parts connected by a threaded central part with opposite threads at its opposite ends, i.e. for adjusting the distance between both end parts by rotating the central part
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30507—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a threaded locking member, e.g. a locking screw or a set screw
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30517—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a locking plate
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30537—Special structural features of bone or joint prostheses not otherwise provided for adjustable
    • A61F2002/3055—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting length
    • 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
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    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30601—Special structural features of bone or joint prostheses not otherwise provided for telescopic
    • 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
    • A61F2002/30784—Plurality of holes
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    • 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
    • A61F2/30907—Nets or sleeves applied to surface of prostheses or in cement
    • A61F2002/30909—Nets
    • A61F2002/30912—Nets made of expanded metal, e.g. diamond mesh or metal nets having lozenge-shaped apertures
    • 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
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A—HUMAN NECESSITIES
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    • 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
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
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    • 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
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    • A—HUMAN NECESSITIES
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    • 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0063—Three-dimensional shapes
    • A61F2230/0069—Three-dimensional shapes cylindrical
    • 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
    • A61F2310/00011—Metals or alloys
    • A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
    • 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
    • Y10S606/907—Composed of particular material or coated

Definitions

  • the invention relates to a height-adjustable vertebral body replacement.
  • the object of the invention is to provide a height-adjustable vertebral body replacement that is mechanically simple and easy to use and that enables good growth. This object is achieved by the height-adjustable vertebral body replacement described in claim 1. Developments of the invention are characterized in the subclaims.
  • Figure 1 is an exploded side view of a first embodiment.
  • FIG. 2 shows a processed detail from FIG. 1;
  • Fig. 3 shows a modified embodiment shown partially in section
  • Fig. 4 is a side view of an embodiment in two different settings.
  • the high adjustable vertebral body replacement has a cylindrically shaped middle part 1. As seen in the axial direction, this has a raised ring 2 in the middle and threaded sections 3 and 4 on both sides of its adjoining sections. One section 3 is designed as a left-hand thread and the other section 4 as a right-hand thread.
  • the ring 2 has bores 5 which are offset with respect to one another in the circumferential direction, and the threaded sections 3 and 4 have diamond-shaped openings 6 which are aligned coaxially.
  • a cylindrical first part 7 is provided. This has on its inside a thread cooperating with the thread of the threaded portion 4 and is screwed onto the threaded section 4 during operation.
  • the wall is formed from a material having diamonds 6 which are arranged offset with respect to one another in the circumferential direction and in the axial direction.
  • the first part has a plurality of teeth which are spaced apart in the circumferential direction.
  • the prongs are formed in that the edge is placed in the circumferential direction along the center line of a layer of the diamonds 6.
  • the second part 9 differs from the first part only in that its internal thread is designed so that it cooperates with the thread of the threaded portion 3.
  • the second part is screwed onto the threaded section 3 during operation.
  • the diamond-shaped openings 6 in the two thread sections 3 and 4 preferably have the same size and arrangement relationships as the diamond arrangements of the first and second parts.
  • the outer diameter of the ring 2 is selected to be essentially the same as the outer diameter of the first or second part 7, 9.
  • Titanium sheet or titanium tube is preferably chosen as the material for the placeholder, but in any case a biocompatible material.
  • the vertebral body replacement described in this way is simply inserted between the parts to be supported and adjusted to the correct height by rotating the ring 2.
  • FIG. 4a the vertebral body replacement is screwed together almost completely into the starting position to the lowest height, while the height in the position shown in FIG. 4b is increased by screwing apart.
  • the teeth 8 result in a rotationally stable engagement with the adjacent parts.
  • FIG. 3 shows an embodiment of a thread torsion lock for the vertebral body replacement described above.
  • a head or grub screw 11 is arranged in the radial direction so that it engages in the manner shown in FIG. 3 for locking with the thread of the associated threaded section of the central part arrives and causes a fixation.
  • the grub screw is guided in a thread provided in the jacket of the first part.
  • the formation of the respective jacket of the parts 7, 7 ', 9 makes it possible to easily adapt the inclination of the end faces 12 to be brought into engagement with the adjacent vertebral bodies by using a suitable sheet metal shears a part 13 is cut off according to the desired inclination and thus an inclined contact surface 12 'is created. Due to the selection of the material, the new contact surface 12 'also has corresponding serrations 8'.
  • the screws 11 are locked after the height adjustment by turning the middle part 1 via the ring 2, so that a stable and not self-releasing fixation is achieved.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Transplantation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Cardiology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Neurology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Prostheses (AREA)
  • Surgical Instruments (AREA)
  • Pens And Brushes (AREA)
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Abstract

Es wird ein höhenverstellbarer Wirbelkörperersatz mit einem hülsenartigen Mittelteil (1) mit einer Wandung mit einer Mehrzahl von Ausnehmungen (5, 6), welches angrenzend an seinem ersten Rand ein Linksgewinde und angrenzend an seinen zweiten Rand ein Rechtsgewinde aufweist, geschaffen. Mit dem einen Gewindeabschnitt ist ein zylindrisches erstes Teil (7) und mit dem anderen Gewindeabschnitt ein zylindrisches zweites Teil (9) über entsprechende Gewinde verbunden. Die beiden Teile (7, 9) weisen ebenfalls Wandungen mit einer Mehrzahl von Ausnehmungen (8) auf. Beide Teile (7, 9) weisen an ihren freien Rändern jeweils eine Mehrzahl von Zacken (8) auf.

Description

Höhenverstellbarer Wirbelkörperersatz
Die Erfindung betrifft einen höhenverstellbaren Wirbelkörper¬ ersatz.
Aus der DE-GM-91 07 494.0 ist ein höhenverεtellbarer Wirbel¬ körperersatz mit einem Gewindestab, der in seiner Mitte einen Abschnitt zum Ineingriffbringen mit einem Schraubenschlüssel zum Verdrehen des Gewindestabeε, an dem daran anschließenden einen Abschnitt ein Linksgewinde und an dem davon gegenüber¬ liegenden zweiten Abschnitt ein Rechtsgewinde aufweist. Mit jedem Gewindeabschnitt ist jeweils ein ein entsprechendes Ge¬ winde aufweisendes Stützelement verbunden. Das Stützelement weist auf der freien Stirnfläche in achsenparalleler Richtung hervorstehende Dornen auf. Andere höhenverstellbare Wirbelkör¬ perimplantate sind in der AT-B-395 524, der US-A-4, 657, 550 und der DE-C-30 23 942 beschrieben.
Aufgabe der Erfindung ist es, einen höhenverstellbaren irbel¬ körperersatz zu schaffen, der mechanisch einfach ausgebildet und einfach bedienbar ist und der ein gutes Verwachsen ermög¬ licht. Diese Aufgabe wird durch den in Anspruch 1 beschriebenen höhenverstellbaren Wirbelkorperersatz gelöst. Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet.
Weitere Merkmale und Zweckmäßigkeiten der Erfindung ergeben sich aus der Beschreibung von Ausführungsbeispielen anhand der Figuren.
Von den Figuren zeigen:
Fig. 1 eine Seitenansicht in Explosionsdarstellung einer ersten Ausführungsform;
Fig. 2 ein bearbeitetes Detail aus Fig. 1;
Fig. 3 eine teilweise geschnitten dargestellte abgewandelte Ausführungsform; und
Fig. 4 eine Seitenansicht einer Ausführungsform in zwei verschiedenen Einstellungen.
Der hohenverstellbare Wirbelkorperersatz weist ein zylindrisch ausgebildetes Mittelteil 1 auf. Dieses weist in axialer Rich¬ tung gesehen in der Mitte einen erhabenen Ring 2 und an seinen daran angrenzenden Abschnitten auf beiden Seiten Gewindeab¬ schnitte 3 und 4 auf. Dabei ist der eine Abschnitt 3 als Linksgewinde und der andere Abschnitt 4 als Rechtsgewinde aus¬ gebildet. Der Ring 2 weist in Umfangsrichtung gegeneinander versetzt angeordnete Bohrungen 5 auf, und die Gewindeab¬ schnitte 3 und 4 weisen koaxial ausgerichtete rautenförmige Öffnungen 6 auf.
Ferner ist ein zylindrisch ausgebildetes erstes Teil 7 vorge¬ sehen. Dieses weist auf seiner Innenseite eine mit dem Gewinde des Gewindeabschnittes 4 zusammenwirkendes Gewinde auf und ist im Betrieb auf dem Gewindeabschnitt 4 aufgeschraubt. Die Wan¬ dung ist aus einem in Umfangsrichtung und in Axialrichtung ge¬ geneinander versetzt angeordneten Rauten 6 aufweisendem Mate¬ rial gebildet. An seinem dem Ring 2 abgewandten freien Ende weist das erste Teil eine Mehrzahl von in Umfangsrichtung von¬ einander einen Abstand aufweisende Zacken auf. Die Zacken sind, wie am besten aus Fig. 1 ersichtlich ist, dadurch ge¬ bildet, daß der Rand in Umfangsrichtung entlang der Mittel¬ linie einer Schicht der Rauten 6 gelegt ist.
Das zweite Teil 9 unterscheidet sich gegenüber dem ersten Teil nur dadurch, daß sein Innengewinde so ausgebildet ist, daß es mit dem Gewinde des Gewindeabschnittes 3 zusammenwirkt. Das zweite Teil ist im Betrieb auf den Gewindeabschnitt 3 aufge¬ schraubt.
Die rautenförmigen Öffnungen 6 in den beiden Gewindeabschnit¬ ten 3 und 4 haben vorzugsweise die gleichen Größenverhältnisse und Anordnungsverhältnisse wie die Rautenanordnungen des er¬ sten und des zweiten Teiles. Der Außendurchmesser des Ringes 2 ist im wesentlichen gleich dem Außendurchmesser des ersten bzw. zweiten Teiles 7, 9 gewählt.
Als Material für den Platzhalter wird vorzugsweise Titanblech bzw. Titanrohr gewählt, auf jeden Fall aber ein biokompatibles Material.
Im Betrieb wird der so beschriebene Wirbelkorperersatz in dem zusammengeschraubten Zustand einfach zwischen die abzustützen¬ den Teile eingesetzt und durch Drehen an dem Ring 2 auf die richtige Höhe eingestellt. In Fig. 4a ist der Wirbelkorperer¬ satz nahezu vollständig in die Ausgangsstellung auf die ge¬ ringste Höhe zusammengeschraubt, während die Höhe in der in Fig. 4b gezeigten Stellung durch Auseinanderschrauben vergrö¬ ßert ist. Durch die Zacken 8 erfolgt ein drehstabiler Eingriff mit den benachbarten Teilen. Durch die Ausnehmungen 5 und 6 erfolgt ein gutes Durchwachsen mit im Inneren des hohlen Wirbelkörperersatzes anzubringender Knochensubstanz.
In Fig. 3 ist eine Ausführungsform einer Gewindetorsionssiche- rung für den oben beschriebenen Wirbelkorperersatz gezeigt. An dem Ring 2 zugewandten Ende 10 des ersten Teiles 7 ist eine Kopf- oder Madenschraube 11 in radialer Richtung so angeord¬ net, daß diese in der in Fig. 3 gezeigten Weise zur Arretie¬ rung mit dem Gewinde des zugehörigen Gewindeabschnittes des Mittelteiles in Eingriff gelangt und eine Fixierung bewirkt. Die Madenschraube ist, wie aus Fig. 3 ersichtlich ist, in einem in dem Mantel des ersten Teiles vorgesehenen Gewinde ge¬ führt.
Wie am besten aus Fig. 2 ersichtlich ist, ermöglicht die Aus¬ bildung des jeweiligen Mantels der Teile 7, 7', 9 es, eine einfache Anpassung der Neigung der mit den benachbarten Wir¬ belkörpern in Eingriff zu bringenden Endflächen 12, indem mit einer geeigneten Blechschere entsprechend der gewünschten Nei¬ gung ein Teil 13 abgetrennt und somit eine geneigte Kontakt¬ fläche 12' geschaffen wird. Durch die Auswahl des Materials weist auch die neue Kontaktfläche 12 ' entsprechende Zacken 8 ' auf.
Im Betrieb erfolgt nach der Höheneinstellung mittels Verdre- hens des Mittelteiles 1 über den Ring 2 ein Arretieren der Schrauben 11, so daß eine stabile und sich nicht selbst lösen¬ de Fixierung erreicht ist.

Claims

PATENTANSPRÜCHE
1. Höhenverstellbarer Wirbelkorperersatz mit einem hülsenar¬ tigen Mittelteil (1) , welches angrenzend an seinen ersten Rand ein Linksgewinde und angrenzend an seinen zweiten Rand ein Rechtsgewinde aufweist, mit einem zylindrischen ersten Teil (7) mit einer mit einer Wandung mit einer Mehrzahl von Ausnehmungen (5, 6) und einem zylindrischen zweiten Teil ((9) mit einer Wandung mit einer Mehrzahl von Ausnehmungen (5, 6) , wobei das erste Teil (7) ein mit dem Linksgewinde zusammenwirkendes Gewinde und das zweite Teil (9) ein mit dem Rechtsgewinde zusammenwirkendes Gewinde und beide Teile an ihrem freien Ende ersten Rand jeweils eine Mehrzahl von Zacken (8) aufweisen.
2. Höhenverstellbarer Wirbelkorperersatz nach Anspruch 1, dadurch gekennzeichnet, daß das Gewinde jedes der Teile (7, 9) an dem dem ersten Rand gegenüberliegenden zweiten Rand vorge¬ sehen ist.
3. Höhenverstellbarer Wirbelkorperersatz nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Gewinde des Mittel¬ teiles (1) als Außengewinde und die der Teile als Innengewinde ausgebildet sind.
4. Höhenverstellbarer Wirbelkorperersatz nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Mittelteil
(1) zwischen den Gewindeabschnitten (3, 4) einen Abschnitt (5) zum Drehen des Mittelteiles (1) relativ zu den beiden Teilen (7, 9) aufweist.
5. Höhenverstellbarer Wirbelkorperersatz nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß eine Einrich¬ tung (11, 12) zum Arretieren des Mittelteiles (1) gegen Rela¬ tivdrehung'' zu wenigstens einem Teil (7, 8) vorgesehen ist. 6. Höhenverstellbarer Wirbelkorperersatz nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Ausnehmun¬ gen (5,
6) in der Wandung der Teile (7, 9) bzw. des Mitteltei¬ les als sich im wesentlichen in Axialrichtung der Hohlkörper erstreckende Vierecke bzw. Rauten (8) ausgebildet sind.
7. Höhenverstellbarer Wirbelkorperersatz nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß als Material Titanblech bzw. Titanrohr gewählt ist.
PCT/EP1996/002092 1995-05-24 1996-05-15 Höhenverstellbarer wirbelkörperersatz WO1996037170A1 (de)

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DE59608379T DE59608379D1 (de) 1995-05-24 1996-05-15 Höhenverstellbarer wirbelkörperersatz
EP96916090A EP0828463B1 (de) 1995-05-24 1996-05-15 Höhenverstellbarer wirbelkörperersatz
US08/952,908 US5989290A (en) 1995-05-24 1996-05-15 Height-adjustable artificial vertebral body
AT96916090T ATE209883T1 (de) 1995-05-24 1996-05-15 Höhenverstellbarer wirbelkörperersatz
JP53534396A JP3827326B2 (ja) 1995-05-24 1996-05-15 調節可能な高さを有する代替椎骨
HU9801916A HU219723B (hu) 1995-05-24 1996-05-15 Állítható magasságú csigolyatestpótlás

Applications Claiming Priority (2)

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DE19519101.3 1995-05-24
DE19519101A DE19519101B4 (de) 1995-05-24 1995-05-24 Höhenverstellbarer Wirbelkörperersatz

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EP (1) EP0828463B1 (de)
JP (1) JP3827326B2 (de)
KR (1) KR19990014877A (de)
CN (1) CN1122504C (de)
AT (1) ATE209883T1 (de)
DE (2) DE19519101B4 (de)
HU (1) HU219723B (de)
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KR19990014877A (ko) 1999-02-25
HUP9801916A2 (hu) 1998-12-28
DE19519101B4 (de) 2009-04-23
US5989290A (en) 1999-11-23
EP0828463B1 (de) 2001-12-05
EP0828463A1 (de) 1998-03-18
CN1122504C (zh) 2003-10-01
ATE209883T1 (de) 2001-12-15
TW297273U (en) 1997-02-01
HU219723B (hu) 2001-07-30
CN1185099A (zh) 1998-06-17
HUP9801916A3 (en) 1999-04-28
DE19519101A1 (de) 1996-11-28
JPH11505736A (ja) 1999-05-25
DE59608379D1 (de) 2002-01-17

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