WO2005044151A1 - Implant for placing between vertebral bodies - Google Patents

Implant for placing between vertebral bodies Download PDF

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Publication number
WO2005044151A1
WO2005044151A1 PCT/DE2004/002445 DE2004002445W WO2005044151A1 WO 2005044151 A1 WO2005044151 A1 WO 2005044151A1 DE 2004002445 W DE2004002445 W DE 2004002445W WO 2005044151 A1 WO2005044151 A1 WO 2005044151A1
Authority
WO
WIPO (PCT)
Prior art keywords
implant
plate
blind hole
vertebral body
implant plate
Prior art date
Application number
PCT/DE2004/002445
Other languages
German (de)
French (fr)
Inventor
Sideris Pantazis
Original Assignee
Ulrich Gmbh & Co. Kg
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 Ulrich Gmbh & Co. Kg filed Critical Ulrich Gmbh & Co. Kg
Publication of WO2005044151A1 publication Critical patent/WO2005044151A1/en

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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
    • A61F2/442—Intervertebral or spinal discs, e.g. resilient
    • A61F2/4425—Intervertebral or spinal discs, e.g. resilient made of articulated components
    • 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
    • A61F2002/30199—Three-dimensional shapes
    • A61F2002/302—Three-dimensional shapes toroidal, e.g. rings
    • 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
    • A61F2002/30331—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
    • A61F2002/30354—Cylindrically-shaped protrusion and recess, e.g. cylinder of circular basis
    • 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
    • A61F2002/30331—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
    • A61F2002/30364—Rotation about the common longitudinal axis
    • 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
    • A61F2002/30495—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a locking ring
    • 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
    • A61F2002/30589—Sealing means
    • 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
    • A61F2002/30667—Features concerning an interaction with the environment or a particular use of the prosthesis
    • A61F2002/30682—Means for preventing migration of particles released by the joint, e.g. wear debris or cement particles
    • 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
    • A61F2002/30667—Features concerning an interaction with the environment or a particular use of the prosthesis
    • A61F2002/30682—Means for preventing migration of particles released by the joint, e.g. wear debris or cement particles
    • A61F2002/30685—Means for reducing or preventing the generation of wear particulates
    • 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
    • A61F2002/30841—Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
    • 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
    • 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
    • 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
    • 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
    • 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
    • A61F2230/0065—Three-dimensional shapes toroidal, e.g. ring-shaped, doughnut-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
    • 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
    • A61F2310/00017—Iron- or Fe-based alloys, e.g. stainless steel
    • 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
    • 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
    • A61F2310/00389—The prosthesis being coated or covered with a particular material
    • A61F2310/00592—Coating or prosthesis-covering structure made of ceramics or of ceramic-like compounds
    • A61F2310/00796—Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite

Definitions

  • Implant to be inserted between the vertebral body
  • the invention relates to an implant for insertion between the vertebral body, in particular the vertebral body of the cervical spine.
  • Implants for insertion between vertebral bodies as placeholders for vertebrae, vertebral parts or intervertebral discs removed from the spine are known from practice and are described, for example, in DE 44 23 257 AI or DE 101 16 412 Cl. These known implants serve to fuse adjacent vertebral bodies in order to stabilize the spine when the natural stability due to degenerative or traumatic diseases is no longer present. This fusion of adjacent vertebral bodies, however, requires stiffening of the spine in the fused one Section that limits the overall mobility of the spine. With regard to the use of the known implants, it is obvious that their construction and the resulting dimensions mean that use in the area of the cervical spine is excluded.
  • the invention is therefore based on the object of designing an implant of the type mentioned at the outset in such a way that one after the implantation natural mobility of the 15 adjacent vertebrae relative to each other is given.
  • a blind hole is formed in a first implant plate intended for contact with one vertebral body, that in a second implant plate intended for contact with the other vertebral body the blind hole to be inserted is formed, and that of the two base surfaces of the blind hole base and the end of the pin end which are intended for contact, a base surface, preferably convex, is curved and the other base surface is preferably designed to be flat.
  • the advantage is achieved that the -3-0- -I-mpl-an-ta-t — e-inen - very — easy-to-fit-ba-u - bes- i-tz-t - nd - can be provided in small dimensions that are also suitable for the cervical spine, the pin being inserted into the blind hole displacing the two implant plates is prevented by a form fit, while the two base surfaces with different curvature, in particular with different radii of curvature, which allow rolling 5, enable a tilting movement which enables the two adjacent vertebral bodies to tilt towards one another.
  • the pin and the blind hole are circular in cross section.
  • This design has the great advantage that not only the tilting movements that are possible with a natural spine are made possible by the implant, but also a rotational movement about the longitudinal axis of the pin or the blind hole is released, in an unhindered superposition with the Tilting movement, so that a movement possibility approximating the natural movement sequence is provided as a result.
  • the side wall of the blind hole is formed by a plastic ring which functions as a sliding ring, since an optimized one with regard to the low wear
  • the plastic ring can also take on the function of a seal in order to prevent or suppress the ingrowth of body tissue, in order to increase the mobility inherent in the implant over a long period of time
  • first implant plate and / or the second implant plate is made of titanium or surgical steel.
  • a permanent anchoring of the implant relative to the vertebral body is provided by the fact that a tooth is formed on the surface of the first implant plate and / or the second implant plate facing the vertebral body. It is preferred that the tooth is provided several times in an embodiment as a rim-side rim, since a firm connection to the vertebral body is achieved in a simple manner, which prevents both a translational and a rotational adjustment of the implant plate relative to the vertebral body.
  • the implant is preferably designed so that the surface facing the vertebral body and that of the other implant plate face at least one of the implant plates Surface inclined to each other.
  • This implant plate a wedge shape, which prevents a coaxial alignment of the vertebral bodies from being forced by the implantation. It has proven to be expedient if the angle of inclination is in the range from 2 ° to 30 °, preferably in the range from 5 ° to 15 °, and also implant plates with different ones
  • Tilt angles can be provided, which can be easily supplemented with the other implant plate to the finished implant.
  • the simplified handling of the implant during the operation serves that receptacles for an operating instrument are formed in the periphery of the first implant plate and the second implant plate. 5
  • the improvement of the mobility of the first implant plate compared to the second implant plate is that the outer surface of the pin is barrel-shaped, so that the pin lies in line contact 10 the blind hole without hindrance to the tilting movement.
  • the length of the pin is dimensioned such that when the maximum tilt position is reached, the mutually facing 15 surfaces of the first implant plate and the second implant plate come to rest on one side, that is to say on the one hand an additional support and on the other hand, a limitation of the tilt angle is provided by means of a stop.
  • at least one of the implant plates is coated with calcium phosphate or hydroxyapatite.
  • 1 is a perspective view of the isolated -3O implant
  • FIG. 2 is a perspective view of the back of the implant of FIG. 1, 3 shows an exploded view of the implant from FIG. 1,
  • FIG. 4 shows an exploded view of the implant from FIG. 1 in a side view
  • FIG. 8 shows a side view of the implant, shown partly in section, in a first boundary division with respect to the tilt angle
  • FIG. 9 shows a representation of the implant corresponding to FIG. 8 in the middle position
  • FIG. 10 shows a representation corresponding to FIG. 8 in the limit position which is different with respect to the tilt angle
  • an implant 1 which serves for insertion between the vertebral body, in particular the cervical spine, as a replacement for partially or completely removed intervertebral discs.
  • This implant 1 consists of a first implant plate 2 intended for bearing against one vertebral body and a second implant plate intended for bearing against the other vertebral body Implant plate 3, a blind hole 4 being assigned to the first implant plate 2 and a pin 5 to be inserted into the blind hole 4 being assigned to the second implant plate 3.
  • one base surface is convexly curved and the other base surface is designed to be flat, so that as a result the first implant plate 2 can perform a tilting movement relative to the second implant plate 3. Furthermore, since the ten pin 5 and the blind hole 4 are circular in cross section, the two implant plates 2, 3 can be rotated relative to one another, so that this implant 1 simulates the natural movement of the cervical spine
  • the first implant plate 2 and the second implant plate 3 are made of titanium or alternatively of surgical steel and with calcium phosphate or hydroxyapatite
  • Teeth 9 are configured as a rim-side rim, which serve to permanently fix the first implant plate 2 and the second implant plate 3 relative to the respectively associated vertebral bodies.
  • the first implant plate 2 having the blind hole 4 the surface facing the vertebral body and the surface facing the second implant plate 3 run inclined to one another with an angle of inclination which is in the range from 2 ° to 30 °, preferably in the range from 5 ° to 15 °.
  • receptacles 10 for a surgical instrument are formed (FIGS. 5, 6).
  • the length of the pin 5 can be dimensioned such that when the maximum tilt position is reached, the surfaces of the first implant plate 2 and the second implant plate 3 facing one another come to rest on one side.

Abstract

The invention relates to an implant for placing between vertebral bodies of the cervical spine. A blind hole (4) is made in a first implant plate (2) designated for placement against a first vertebral body, and a projection (5), which is to be placed inside the blind hole (4), is formed on a second implant plate (3) designated for placement against the other vertebral body. A base is convexly curved from both bases of the blind hole bottom (6) and of the projection end (7), said bases being designated for coming in contact with one another, and the other base is provided with a planar shape.

Description

Implantat zum Einsetzen zwischen WirbelkörperImplant to be inserted between the vertebral body
Die Erfindung betrifft ein Implantat zum Einsetzen zwischen Wirbelkörper, insbesondere Wirbelkörper der Halswirbelsäule.The invention relates to an implant for insertion between the vertebral body, in particular the vertebral body of the cervical spine.
Implantate zum Einsetzen zwischen Wirbelkörper als Platzhalter für aus der Wirbelsäule entfernte Wirbel, Wirbelteile oder Bandscheiben sind aus der Praxis bekannt und beispielsweise in der DE 44 23 257 AI oder der DE 101 16 412 Cl beschrieben. Diese bekannten Implantate dienen dazu, benachbarte Wirbelkörper zu fusionieren, um so eine Stabilisierung der Wirbelsäule zu erreichen, wenn die natürliche Stabilität in Folge degenerativer oder traumatischer Erkrankungen nicht mehr gegeben ist. Diese Fusionierung benachbarter Wirbelkörper bedingt allerdings eine Versteifung der Wirbelsäule in dem fusionierten Abschnitt, durch die die Beweglichkeit der Wirbelsäule insgesamt eingeschränkt wird. Im Hinblick auf die Verwendung der bekannten Implantate ist offensichtlich, daß durch deren konstruktiven Aufbau und der daraus resultierenden Abmessungen die Verwendung im Bereich der Halswirbelsäule ausgeschlossen ist. Zu beachten ist weiterhin, daß auch eine nur teilweise Versteifung der Halswirbelsäule für den betroffenen Patienten mit einer starken Beeinträchtigung der Lebensqualität verbunden ist, 10 Der Erfindung liegt daher die Aufgabe zugrunde, ein Implantat der eingangs genannten Art so auszubilden, daß nach der Implantation eine den natürlichen Verhältnissen möglichst enstprechende Beweglichkeit der beiden 15 benachbarten Wirbelkörpern relativ zueinander gegeben ist.Implants for insertion between vertebral bodies as placeholders for vertebrae, vertebral parts or intervertebral discs removed from the spine are known from practice and are described, for example, in DE 44 23 257 AI or DE 101 16 412 Cl. These known implants serve to fuse adjacent vertebral bodies in order to stabilize the spine when the natural stability due to degenerative or traumatic diseases is no longer present. This fusion of adjacent vertebral bodies, however, requires stiffening of the spine in the fused one Section that limits the overall mobility of the spine. With regard to the use of the known implants, it is obvious that their construction and the resulting dimensions mean that use in the area of the cervical spine is excluded. It should also be noted that even a partial stiffening of the cervical spine is associated with a severe impairment of the quality of life for the patient concerned. 10 The invention is therefore based on the object of designing an implant of the type mentioned at the outset in such a way that one after the implantation natural mobility of the 15 adjacent vertebrae relative to each other is given.
Diese Aufgabe wird nach der Erfindung bei einem Implantat der eingangs genannten Art dadurch gelöst, daß in einer ersten, zur Anlage an dem einen Wirbelkörper bestimmten 20 Implantatplatte ein Sackloch ausgebildet ist, daß an einer zweiten, zur Anlage an dem anderen Wirbelkörper bestimmten Implantatplatte ein in das Sackloch einzusetzender Zapfen ausgebildet ist, und daß von den einander zur Anlage bestimmten beiden Grundflächen des Sacklochbodens und des 25 Zapfenendes eine Grundfläche, vorzugsweise konvex, gekrümmt und die andere Grundfläche vorzugsweise plan gestaltet ist.This object is achieved according to the invention in the case of an implant of the type mentioned at the outset in that a blind hole is formed in a first implant plate intended for contact with one vertebral body, that in a second implant plate intended for contact with the other vertebral body the blind hole to be inserted is formed, and that of the two base surfaces of the blind hole base and the end of the pin end which are intended for contact, a base surface, preferably convex, is curved and the other base surface is preferably designed to be flat.
Durch diese Erfindung ist der Vorteil erreicht, daß das -3-0- -I-mpl-a-n-ta-t—e-inen--sehr—e-i-n-fae-hen-Au-f-ba-u--bes-i-tz-t— nd--i-n- kleinen, auch für die Halswirbelsäule geeigneten Abmessungen bereitgestellt werden kann, wobei durch den in das Sackloch einzusetzenden Zapfen eine Verschiebung der beiden Implantatplatten durch einen Formschluß unterbunden ist, während durch die beiden Grundflächen mit unterschiedlicher Krümmung, insbesondere mit unterschiedlichen Krümmungsradien, die ein Abrollen 5 gestatten, eine Kippbewegung ermöglicht wird, die eine Neigung der beiden benachbarten Wirbelkörper zueinander ermöglicht.With this invention, the advantage is achieved that the -3-0- -I-mpl-an-ta-t — e-inen - very — easy-to-fit-ba-u - bes- i-tz-t - nd - can be provided in small dimensions that are also suitable for the cervical spine, the pin being inserted into the blind hole displacing the two implant plates is prevented by a form fit, while the two base surfaces with different curvature, in particular with different radii of curvature, which allow rolling 5, enable a tilting movement which enables the two adjacent vertebral bodies to tilt towards one another.
Im Rahmen der Erfindung ganz besonders bevorzugt ist es, 10 wenn der Zapfen und das Sackloch im Querschnitt kreisförmig geformt sind. Durch diese Gestaltung ist der große Vorteil erreicht, daß nicht lediglich die bei einer natürlichen Wirbelsäule möglichen Kippbewegungen durch das Implantat ermöglicht werden, sondern auch eine 15 rotatorische Bewegung um die Längsachse des Zapfens beziehungsweise des Sackloches freigegeben ist, und zwar in einer unbehinderten Superposition mit der Kippbewegung, so daß im Ergebnis eine dem natürlichen Bewegungsablauf angenäherte Bewegungsmöglichkeit bereitgestellt wird.Within the scope of the invention, it is particularly preferred if the pin and the blind hole are circular in cross section. This design has the great advantage that not only the tilting movements that are possible with a natural spine are made possible by the implant, but also a rotational movement about the longitudinal axis of the pin or the blind hole is released, in an unhindered superposition with the Tilting movement, so that a movement possibility approximating the natural movement sequence is provided as a result.
20 Es hat sich als zweckmäßig erwiesen, wenn die Seitenwandung des Sackloches durch einen als Gleitring fungierenden Kunststoffring gebildet ist, da so im Hinblick auf den geringen Verschleiß eine optimierte20 It has proven to be expedient if the side wall of the blind hole is formed by a plastic ring which functions as a sliding ring, since an optimized one with regard to the low wear
25 Reibpaarung gewählt werden kann. Der Kunststoffring kann darüberhinaus auch die Funktion einer Dichtung übernehmen, um das Einsprossen von Körpergewebe zu verhindern beziehungsweise zu unterdrücken, um über einen langen Zeitraum die dem Implantat eigene Beweglichkeit zu25 friction pairing can be selected. The plastic ring can also take on the function of a seal in order to prevent or suppress the ingrowth of body tissue, in order to increase the mobility inherent in the implant over a long period of time
-3-0— erha-1-te-n-— Im Hinblick auf die auf das Implantat einwirkenden Belastungen ist es günstig, wenn die erste Implantatplatte und/oder die zweite Implantatplatte aus Titan oder aus chirurgischem Stahl gefertigt ist.-3-0— erha-1-th-n-— In view of the loads acting on the implant, it is advantageous if the first implant plate and / or the second implant plate is made of titanium or surgical steel.
Einer dauerhaften Verankerung des Implantats relativ zu dem Wirbelkörper dient, daß auf der dem Wirbelkörper zugewandten Oberfläche der ersten Implantatplatte und/oder der zweiten Implantatplatte ein Zahn ausgebildet ist. Dabei ist bevorzugt, daß der Zahn mehrfach vorgesehen ist in einer Ausbildung als randseitiger Kranz, da so eine feste Verbindung zu dem Wirbelköper in einfacher Weise erreicht wird, die sowohl eine translatorische als auch eine rotatorische Verstellung der Implantatplatte relativ zu dem Wirbelkörper unterbindet.A permanent anchoring of the implant relative to the vertebral body is provided by the fact that a tooth is formed on the surface of the first implant plate and / or the second implant plate facing the vertebral body. It is preferred that the tooth is provided several times in an embodiment as a rim-side rim, since a firm connection to the vertebral body is achieved in a simple manner, which prevents both a translational and a rotational adjustment of the implant plate relative to the vertebral body.
Um eine möglichst gute Anpassung an die anatomischen Gegebenheiten der Wirbelsäule zu ermöglichen und die natürliche Stellung der Wirbel unter Berücksichtigung der Lordose zu gewährleisten, ist das Implantat vorzugsweise so gestaltet, daß bei mindestens einer der Implantatplatten die dem Wirbelkörper zugewandte Oberfläche und die der anderen Implantatplatte zugewandte Oberfläche geneigt zueinander verlaufen. Dadurch erhält diese Implantatplatte eine Keilform, die verhindert, daß durch die Implantation eine koaxiale Ausrichtung der Wirbelköper erzwungen wird. Es hat sich als zweckmäßig erwiesen, wenn der Neigungswinkel im Bereich von 2° bis 30°, vorzugsweise im Bereich von 5° bis 15° liegt, wobeiauch Implantatplatten mit unterschiedlichenIn order to enable the best possible adaptation to the anatomical conditions of the spine and to ensure the natural position of the vertebrae, taking lordosis into account, the implant is preferably designed so that the surface facing the vertebral body and that of the other implant plate face at least one of the implant plates Surface inclined to each other. This gives this implant plate a wedge shape, which prevents a coaxial alignment of the vertebral bodies from being forced by the implantation. It has proven to be expedient if the angle of inclination is in the range from 2 ° to 30 °, preferably in the range from 5 ° to 15 °, and also implant plates with different ones
Neigungswinkeln bereitgestellt werden können, die in einfacher Weise mit der anderen Implatatplatte zu dem fertigen Implantat zu ergänzen sind. Der vereinfachten Handhabung des Implantates während der Operation dient, daß in der Peripherie der ersten Implantatplatte und der zweiten Implantatplatte Aufnahmen für ein Operationsinstrument ausgebildet sind. 5 Der Verbesserung der Beweglichkeit der ersten Implantatplatte gegenüber der zweiten Implantatplatte dient, daß die Mantelfläche des Zapfens tonnenförmig gekrümmt ist, so daß der Zapfen in einer Linienberührung 10 dem Sackloch liegt ohne Behinderung für die Kippbewegung.Tilt angles can be provided, which can be easily supplemented with the other implant plate to the finished implant. The simplified handling of the implant during the operation serves that receptacles for an operating instrument are formed in the periphery of the first implant plate and the second implant plate. 5 The improvement of the mobility of the first implant plate compared to the second implant plate is that the outer surface of the pin is barrel-shaped, so that the pin lies in line contact 10 the blind hole without hindrance to the tilting movement.
Im Rahmen der Erfindung ist weiterhin vorgesehen, daß die Länge des Zapfens so bemessen ist, daß bei Erreichen der maximalen Kippstellung die einander zugewandten 15 Oberflächen der ersten Implantatplatte und der zweiten Implantatplatte auf einer Seite zur Anlage kommen, daß also zum einen eine zusätzliche Abstützung und zum anderen eine Begrenzung des Kippwinkels mittels eines Anschlages bereitgestellt wird. 20 Zur Verbesserung der Haltbarkeit ist mindestens eine der Implantatplatten mit Calciumphosphat oder Hydroxylapatit beschichtet.In the context of the invention it is further provided that the length of the pin is dimensioned such that when the maximum tilt position is reached, the mutually facing 15 surfaces of the first implant plate and the second implant plate come to rest on one side, that is to say on the one hand an additional support and on the other hand, a limitation of the tilt angle is provided by means of a stop. 20 To improve durability, at least one of the implant plates is coated with calcium phosphate or hydroxyapatite.
25 Im folgenden wird die Erfindung an einem in der Zeichnung dargestellten Ausführungsbeispiel näher erläutert; es zeigen:25 In the following the invention is explained in more detail using an embodiment shown in the drawing; show it:
Fig. 1 eine perspektivische Darstellung des isolierten -3O Implantates,1 is a perspective view of the isolated -3O implant,
Fig. 2 eine perspektivische Darstellung der Rückseite des Implantats aus Fig. 1, Fig. 3 eine Explosionsdarstellung des Implantats aus Fig. 1,2 is a perspective view of the back of the implant of FIG. 1, 3 shows an exploded view of the implant from FIG. 1,
Fig. 4 eine Explosionsdarstellung des Implantats aus Fig. 1 in einer Seitenansicht,4 shows an exploded view of the implant from FIG. 1 in a side view,
Fig. 5 eine Draufsicht auf das Implantat,5 is a plan view of the implant,
Fig. 6 eine Seitenansicht des Implantats,6 is a side view of the implant,
Fig. 7 einen Längsschnitt durch das Implantat,7 shows a longitudinal section through the implant,
Fig. 8 eine Seitenansicht des Implantats, teilweise geschnitten dargestellt, in einer bezogen auf den Kippwinkel ersten Grenzsteilung,8 shows a side view of the implant, shown partly in section, in a first boundary division with respect to the tilt angle,
Fig. 9 eine der Fig. 8 entsprechende Darstellung des Implantats in der Mittelstellung,9 shows a representation of the implant corresponding to FIG. 8 in the middle position,
Fig. 10 eine der Fig. 8 entsprechende Darstellung in der bezogen auf den Kippwinkel anderen Grenzstellung,10 shows a representation corresponding to FIG. 8 in the limit position which is different with respect to the tilt angle,
Fig. 11 das Detail XI aus Fig. 8, und11 shows the detail XI from FIG. 8, and
Fig. 12 das Detail XII aus Fig. 9.12 shows the detail XII from FIG. 9.
In der Zeichnung ist ein Implantat 1 dargestellt, das zum Einsetzen zwischen Wirbelkörper insbesondere der Halswirbelsäule dient als Ersatz für teilweise oder vollständig entfernte Bandscheiben. Dieses Implantat 1 besteht aus einer ersten, zur Anlage an dem einen Wirbelkörper bestimmten Implantatplatte 2 sowie einer zweiten, zur Anlage an dem anderen Wirbelkörper bestimmten Implantatplatte 3, wobei der ersten Implantatplatte 2 ein Sackloch 4 und der zweiten Implantatplatte 3 ein in das Sackloch 4 einzusetzender Zapfen 5 zugeordnet ist . Von den einander zur Anlage bestimmten beiden Grundfläche des 5 Sacklochbodens 6 und des Zapfenendes 7 ist eine Grundfläche konvex gekrümmt und die andere Grundfläche plan gestaltet, so daß im Ergebnis die erste Implantatplatte 2 gegenüber der zweiten Implantatplatte 3 eine Kippbewegung ausführen kann. Da weiterhin der 10 Zapfen 5 und das Sackloch 4 im Querschnitt kreisförmig geformt sind, tritt eine rotatorische Bewegungsmöglichkeit der beiden Implantatplatten 2, 3 relativ zueinander hinzu, so daß durch dieses Implantat 1 eine Nachbildung der natürlichen Bewegungsmδglichkeit der HalswirbelsäuleIn the drawing, an implant 1 is shown, which serves for insertion between the vertebral body, in particular the cervical spine, as a replacement for partially or completely removed intervertebral discs. This implant 1 consists of a first implant plate 2 intended for bearing against one vertebral body and a second implant plate intended for bearing against the other vertebral body Implant plate 3, a blind hole 4 being assigned to the first implant plate 2 and a pin 5 to be inserted into the blind hole 4 being assigned to the second implant plate 3. Of the two base surfaces of the 5 blind hole base 6 and the pin end 7 which are intended to be in contact with one another, one base surface is convexly curved and the other base surface is designed to be flat, so that as a result the first implant plate 2 can perform a tilting movement relative to the second implant plate 3. Furthermore, since the ten pin 5 and the blind hole 4 are circular in cross section, the two implant plates 2, 3 can be rotated relative to one another, so that this implant 1 simulates the natural movement of the cervical spine
15 erreicht und eine Versteifung der Halswirbelsäule durch die Implantation vermieden ist. Die erste Implantatplatte 2 und die zweite Implantatplatte 3 sind aus Titan oder alternativ aus chirurgischen Stahl gefertigt und mit Calciumphosphat oder Hydroxylapatit15 reached and stiffening of the cervical spine is avoided by the implantation. The first implant plate 2 and the second implant plate 3 are made of titanium or alternatively of surgical steel and with calcium phosphate or hydroxyapatite
20 beschichtet, während die Seitenwandung des Sackloches 4 durch einen als Gleitring fungierenden Kunststoffring 8 gebildet ist. Insbesondere den Figuren 7 bis 10 ist zu entnehmen, daß die Mantelfläche des Zapfens 5 tonnenförmig gekrümmt ist, so daß die Kippbewegung nicht behindert und20 coated, while the side wall of the blind hole 4 is formed by a plastic ring 8 acting as a sliding ring. It can be seen in particular from FIGS. 7 to 10 that the outer surface of the pin 5 is curved in a barrel shape, so that the tilting movement is not impeded and
25 unabhängig von der Kippstellung durch die Linienberührung zu der zylindrischen Innenfläche des Sackloches 4 mit dem Kunststoffring 8 eine Abdichtung des Sackloches 4 erreicht ist zur Vermeidung des Einsprossens von Körpergewebe (Fig. 11 und 12) .25 irrespective of the tilt position by the line contact to the cylindrical inner surface of the blind hole 4 with the plastic ring 8, a sealing of the blind hole 4 is achieved to avoid the ingrowth of body tissue (FIGS. 11 and 12).
-30 Aus der Zeichnung ist weiterhin ersichtlich, daß auf der dem Wirbelkörper zugewandten Oberfläche der ersten Implantatplatte 2 und der zweite Implantatplatte 3 mehrere Zähne 9 in einer Ausbildung als randseitiger Kranz angeordnet sind, die der dauerhaften Fixierung der ersten Implantatplatte 2 und der zweiten Implantatplatte 3 relativ zu den jeweils zugeordneten Wirbelkörpern dienen. Bei mindestens einer der Implantatplatten 2, bei dem in der Zeichnung dargestellten Ausführungsbeispiel die das Sackloch 4 aufweisende erste Implantatplatte 2, verlaufen die dem Wirbelkörper zugewandte und die der zweiten Implantatplatte 3 zugewandten Oberfläche geneigt zueinander mit einem Neigungswinkel, der im Bereich von 2° bis 30° , vorzugsweise im Bereich von 5° bis 15° liegen kann. In der Peripherie der ersten Implantatplatte 2 und der zweiten Implantatplatte 3 sind Aufnahmen 10 für ein Operationsinstrument ausgebildet (Fig. 5, 6) . Schließlich ist darauf hinzuweisen, daß die Länge des Zapfens 5 so bemessen sein kann, daß bei Erreichen der maximalen Kippstellung die einander zugewandten Oberflächen der ersten Implantatplatte 2 und der zweiten Implantatplatte 3 auf einer Seite zur Anlage kommen. -30 From the drawing it can also be seen that on the surface of the first implant plate 2 and the second implant plate 3 facing the vertebral body several Teeth 9 are configured as a rim-side rim, which serve to permanently fix the first implant plate 2 and the second implant plate 3 relative to the respectively associated vertebral bodies. In at least one of the implant plates 2, in the exemplary embodiment shown in the drawing, the first implant plate 2 having the blind hole 4, the surface facing the vertebral body and the surface facing the second implant plate 3 run inclined to one another with an angle of inclination which is in the range from 2 ° to 30 °, preferably in the range from 5 ° to 15 °. In the periphery of the first implant plate 2 and the second implant plate 3, receptacles 10 for a surgical instrument are formed (FIGS. 5, 6). Finally, it should be pointed out that the length of the pin 5 can be dimensioned such that when the maximum tilt position is reached, the surfaces of the first implant plate 2 and the second implant plate 3 facing one another come to rest on one side.

Claims

Patentansprüche : Claims:
1. Implantat zum Einsetzen zwischen Wirbelkörper, insbesondere Wirbelkörper der Halswirbelsäule, dadurch gekennzeichnet, daß in einer ersten, zur Anlage an dem einen Wirbelkörper bestimmten Implantatplatte (2) ein Sackloch (4) ausgebildet ist, daß an einer zweiten, zur Anlage an dem anderen Wirbelkörper bestimmten zweiten Implantatplatte (3) ein in das Sackloch (4) einzusetzender Zapfen (5) ausgebildet ist, und daß von den einander zur Anlage bestimmten beiden Grundflächen des Sacklochbodens (6) und des Zapfenendes (7) eine Grundfläche, vorzugsweise konvex, gekrümmt und die andere Grundfläche vorzugsweise plan gestaltet ist.1. Implant for insertion between the vertebral body, in particular the vertebral body of the cervical spine, characterized in that a blind hole (4) is formed in a first implant plate (2) intended to rest on the one vertebral body, that on a second, to rest on the other Vertebral body certain second implant plate (3) is a pin (5) to be inserted into the blind hole (4), and that of the two base surfaces of the blind hole base (6) and the pin end (7) intended for contact with one another, a base surface, preferably convex, is curved and the other base surface is preferably designed flat.
2. Implantat nach Anspruch 1, dadurch gekennzeichnet, daß der Zapfen (5) und das Sackloch (4) im Querschnitt kreisförmig geformt sind.2. Implant according to claim 1, characterized in that the pin (5) and the blind hole (4) are circular in cross section.
Implantat nach Anspruch 1 oder 2 , dadurch gekennzeichnet, daß die Seitenwandung des Sackloches (4) durch einen als Gleitring fungierenden Kunststoffring (8) gebildet ist.Implant according to claim 1 or 2, characterized in that the side wall of the blind hole (4) is formed by a plastic ring (8) functioning as a sliding ring.
Implantat nach einem der Ansprüche 1 bis 3 , dadurch gekennzeichnet, daß die erste Implantatplatte (2) und/oder die zweite Implantatplatte (3) aus Titan oder aus chirurgischem Stahl gefertigt ist.Implant according to one of claims 1 to 3, characterized in that the first implant plate (2) and / or the second implant plate (3) is made of titanium or surgical steel.
Implantat nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß auf der dem Wirbelkörper zugewandten Oberfläche der ersten Implantatplatte (2) und/oder der zweiten Implantatplatte (3) ein Zahn (9) ausgebildet ist.Implant according to one of claims 1 to 4, characterized in that on the surface of the first implant plate (2) facing the vertebral body and / or the second implant plate (3) has a tooth (9).
6. Implantat nach Anspruch 5, dadurch gekennzeichnet, daß der Zahn (9) mehrfach vorgesehen ist in einer Ausbildung als randseitiger Kranz .6. Implant according to claim 5, characterized in that the tooth (9) is provided several times in an embodiment as a rim-side wreath.
7. Implantat nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß bei mindestens einer der Implantatplatten (2, 3) die dem Wirbelkörper zugewandte Oberfläche und die der anderen Implantatplatte (3, 2) zugewandte Oberfläche geneigt zueinander verlaufen.7. Implant according to one of claims 1 to 6, characterized in that in at least one of the implant plates (2, 3) the surface facing the vertebral body and the surface facing the other implant plate (3, 2) are inclined to one another.
8. Implantat nach Anspruch 7, dadurch gekennzeichnet, daß der Neigungswinkel im Bereich von 2° bis 30° vorzugsweise im Bereich von 5° bis 15° liegt.8. Implant according to claim 7, characterized in that the angle of inclination is in the range from 2 ° to 30 °, preferably in the range from 5 ° to 15 °.
9. Implantat nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß in der Peripherie der ersten Implantatplatte (2) und der zweiten Implantatplatte (3) Aufnahmen (10) für ein Operationsinstrument ausgebildet sind.9. Implant according to one of claims 1 to 8, characterized in that in the periphery of the first implant plate (2) and the second implant plate (3) receptacles (10) are formed for a surgical instrument.
10. Implantat nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Mantelfläche des Zapfen (5) tonnenförmig gekrümmt ist .10. Implant according to one of claims 1 to 9, characterized in that the outer surface of the pin (5) is barrel-shaped.
11. Implantat nach Anspruch 10, dadurch gekennzeichnet, daß die Länge des Zapfens (5) so bemessen ist, daß bei Erreichen der maximalen Kippstellung die einander zugewandten Oberflächen der ersten Implantatplatte (2) und der zweiten Implantatplatte (3) auf einer Seite zur Anlage kommen.11. Implant according to claim 10, characterized in that the length of the pin (5) is dimensioned such that when the maximum tilt position is reached, the mutually facing surfaces of the first implant plate (2) and the second implant plate (3) on one side come to the plant.
12. Implantat nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß mindestens eine der Implantatplatten (2, 3) eine Beschichtung aus Calciumphosphat oder Hydroxylapatit aufweist. 12. Implant according to one of claims 1 to 11, characterized in that at least one of the implant plates (2, 3) has a coating of calcium phosphate or hydroxyapatite.
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