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US20010014826A1 - Space holder, in particular for a vertebra or an intervertebral disk - Google Patents

Space holder, in particular for a vertebra or an intervertebral disk Download PDF

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Publication number
US20010014826A1
US20010014826A1 US09/386,885 US38688599A US2001014826A1 US 20010014826 A1 US20010014826 A1 US 20010014826A1 US 38688599 A US38688599 A US 38688599A US 2001014826 A1 US2001014826 A1 US 2001014826A1
Authority
US
United States
Prior art keywords
space holder
holder according
jacket
edge
recesses
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US09/386,885
Inventor
Lutz Biedermann
Jurgen Harms
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US09/386,885 priority Critical patent/US20010014826A1/en
Publication of US20010014826A1 publication Critical patent/US20010014826A1/en
Abandoned legal-status Critical Current

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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
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    • A61F2/30721—Accessories
    • A61F2/30744—End caps, e.g. for closing an endoprosthetic cavity
    • 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
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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
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    • 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
    • A61F2002/30785—Plurality of holes parallel
    • 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
    • A61F2002/30787—Plurality of holes inclined obliquely with respect to each other
    • 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
    • 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
    • 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
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
    • A61F2230/0006—Rounded shapes, e.g. with rounded corners circular
    • 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
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
    • A61F2230/0008—Rounded shapes, e.g. with rounded corners elliptical or oval
    • 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
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0017—Angular shapes
    • 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
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0017—Angular shapes
    • A61F2230/0026—Angular shapes trapezoidal
    • 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
    • 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

Definitions

  • the invention relates to a space holder according to the preamble of claim 1 .
  • Such a space holder is disclosed for example in document EP-B-0 268 115.
  • This space holder comprises a stop formed by a ring on its inner side spaced from the corresponding free end of the jacket.
  • the ring is connected with the jacket by means of bolts.
  • a base plate comprising openings is mounted on the ring.
  • FIG. 1 is a side view of the jacket of the space holder
  • FIG. 2 is a top view of a first embodiment of the member to be connected with the jacket
  • FIG. 3 is a top view of a second embodiment of the member
  • FIG. 3 a is a sectional view along line IIIA-IIIA in FIG. 3;
  • FIG. 4 is a top view of a third embodiment of the member
  • FIG. 5 is a sectioned lateral view along line V-V in FIG. 4;
  • FIG. 6 is a sectional view along line VI-VI in FIG. 7 through a further modified embodiment
  • FIG. 7 is a top view of that embodiment
  • FIG. 8 shows a section along line VIII-VIII in FIG. 9;
  • FIG. 9 is a top view of that further embodiment
  • FIG. 10 shows a section along line X-X in FIG. 11;
  • FIG. 11 is a top view of that further embodiment.
  • the space holder comprises a closed jacket 1 .
  • the cross-section perpendicular to the longitudinal axis 2 of the jacket 1 is shaped in usual manner, in particular cylindrical, oval or kidney-shaped.
  • the jacket 1 comprises diamond-shaped apertures 3 , 4 having a longitudinal diagonal extending parallel to the jacket axis 2 . Adjacent rows 3 , 4 of such diamonds are mutually offset by half a diamond height. In this manner a grid is formed having webs 5 , 6 intersecting at an acute angle and including equal angles with the longitudinal diagonal of the diamonds 3 , 4 .
  • the upper edge 7 and the lower edge 8 both extend in a plane perpendicular to the longitudinal axis 2 .
  • the size of the diamonds 3 , 4 and of the webs 5 , 6 defining the diamonds is selected so that there is an integral number of diamonds in peripheral direction.
  • the edges 7 , 8 generate always an even number of V-shaped recesses 9 , 10 or 9 ′, 10 ′, resp., formed by the respective diamond base in peripheral direction. Owing to the above-described geometry the respective edge is quasi centrically symmetric to a point on the longitudinal axis 2 lying in the plane of the edge.
  • the first embodiment of a member 11 forming a stop shown in FIG. 2 is formed as a plate-shaped ring.
  • the outer contour of the ring 12 corresponds to the inner contour of the jacket 1 . Its dimensions are selected so that it can be pressed into the interior of the jacket but may also be pressed out again if desired, i.e. there is a frictional fit between the ring and the jacket 1 .
  • Equidistant projecting noses 15 are provided at the outer edge of the ring 12 in peripheral direction. The distance between two noses in peripheral direction equals the distance between two peripherally adjacent V-shaped recesses 9 , 10 .
  • the cross-dimensions of the noses 15 in the plane of the plate are such that the noses fit smoothly into the base of the V-shaped recesses 9 , 10 .
  • the length of the projecting noses corresponds to about the wall thickness of the associated jacket.
  • the jacket 1 is brought to the desired length by severing the upper edge 7 and the lower edge 8 . Then one ring 12 is pressed into the interior of the jacket at the upper end and a second ring is pressed into the jacket interior at the lower end in such a manner that the noses 15 of the rings engage the corresponding basis of the associated V-shaped recesses 9 , 10 and 9 ′, 10 ′, resp.
  • one and the same member 11 may be used irrespective of the severing at the edge 7 or at the lowered edge 7 ′ indicated in broken lines. If the edge is formed at the location 7 ′ rather than at the location 7 , then the ring 12 is inserted after rotation around its longitudinal axis, whereby using only one kind of rings the stock-keeping is reduced and the operation is simplified.
  • FIG. 3 shows a member 13 of a modified embodiment. Again it is a plate wherein the holes are formed by bore-shaped holes 14 distributed over the plate. All further features correspond to the member 11 .
  • FIGS. 4 and 5 show a member 16 according to a third embodiment.
  • This member again comprises a plate which corresponds to the embodiment shown in FIG. 3 as regards the holes 14 and the noses 15 .
  • An outer ring 17 is arranged around the plate. As best shown in FIG. 5, the outer ring has a ring wall extending perpendicular to the plane of the plate and therefore parallel to the outer surface of the jacket 1 .
  • the length of the noses 15 is selected so as to be longer than the thickness of the jacket 1 just by an amount to form a clearance 18 between the plate, the noses and the ring which allows pushing the member onto the corresponding free end 7 , 8 of the jacket 1 to fit the noses 15 into the base of the respective corresponding V-shaped recesses 9 , 10 , 9 ′, 10 ′.
  • the inner surface of the ring 17 then sits close to the outer surface of the jacket 1 .
  • FIGS. 6 and 7 a member 19 according to a further embodiment is shown. It has a plate-shaped ring 12 which is identical with the ring shown in FIG. 2. As best shown in FIG. 6 an edge portion 20 having an outer contour which corresponds to the inner contour of the jacket 1 is provided on one surface of this ring and the free end of the edge portion 20 opposite to the plate 12 has equidistant prongs 21 in circumferential direction. The height of the prongs 21 above the plate 12 is so that when inserted the prongs extend beyond the edge 7 or 8 , resp., of the jacket 1 almost to their base.
  • the embodiment of a member 22 shown in FIGS. 8 and 9 differs from the previously described embodiment only in that the base of the prongs is not in a plane parallel to the plate 12 , but in a plane which is inclined with respect to the plate 12 .
  • the edge formed by the prongs lies also in a plane which is inclined with respect to the plate plane of the ring 12 .
  • the inclination is preferably between 8 and 10°.
  • the embodiment of the member 24 shown in FIGS. 10 and 11 differs from the embodiment according to FIGS. 8 and 9 in that the edge portion 20 is inclined with respect to the plane of the plate, i.e. with an angle other than 90° with respect to the plate plane of the ring 12 .
  • both embodiments i.e. the members 19 and 22 , resp., are inserted into the jacket in the same manner as the previously described embodiments so that the projecting noses 15 of the ring 12 lie in the lowermost parts of the V-shaped recesses 9 , 10 and the prongs extend outwardly beyond the edge of the jacket.
  • the prongs 21 or 21 ′ may be cut to different lengths, for example along the broken line 23 to form a wedge-shaped insert.
  • the edge of the member 22 can be cut so that the predetermined angle between the outer egde and the plate-shaped ring 12 is varied. In this manner it is possible to obtain, using few basic members, space holders having different wedge angles.
  • the outer contour of the respective rings 12 and 13 is, of course, determined as a function of the respective inner contour of the associated jacket.
  • the recesses of the edge may have other shapes in place of the V-shape, for example U-shaped or slit-shaped recesses.

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Biomedical Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Neurology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Vascular Medicine (AREA)
  • Cardiology (AREA)
  • Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Prostheses (AREA)
  • Hydrogenated Pyridines (AREA)

Abstract

A space holder in particular for a vertebra or an intervertebral disk is provided. The space holder comprises a jacket (1) having apertures (9, 10) and a first and second edge (7, 8). The edge has circumferentially adjacent recesses (9, 10; 9′, 10′) each extending in direction towards the other edge and a stop provided at at least one of the edges spaced from the outer edge. In order to provide for an easy manufacture and operation of the space holder the stop is formed by a member (11, 13, 16, 22) having an outer contour corresponding to the inner contour of the jacket (1) and nose-like projections (15) for engaging the recesses (9, 10) are provided at those locations of the periphery of the stop which correspond to the recesses (9, 10; 9′, 10′).

Description

  • The invention relates to a space holder according to the preamble of claim [0001] 1.
  • Such a space holder is disclosed for example in document EP-B-0 268 115. This space holder comprises a stop formed by a ring on its inner side spaced from the corresponding free end of the jacket. The ring is connected with the jacket by means of bolts. In a particular embodiment a base plate comprising openings is mounted on the ring. [0002]
  • It is the object of the invention to simplify the space holder and make it more universally applicable. [0003]
  • This object is achieved by the space holder defined in claim [0004] 1.
  • Embodiments of the invention are defined in the subclaims. [0005]
  • Further features and advantages of the invention will stand out from the description of embodiments with reference to the Figures. In the Figures: [0006]
  • FIG. 1 is a side view of the jacket of the space holder; [0007]
  • FIG. 2 is a top view of a first embodiment of the member to be connected with the jacket; [0008]
  • FIG. 3 is a top view of a second embodiment of the member; [0009]
  • FIG. 3[0010] a is a sectional view along line IIIA-IIIA in FIG. 3;
  • FIG. 4 is a top view of a third embodiment of the member; [0011]
  • FIG. 5 is a sectioned lateral view along line V-V in FIG. 4; [0012]
  • FIG. 6 is a sectional view along line VI-VI in FIG. 7 through a further modified embodiment; [0013]
  • FIG. 7 is a top view of that embodiment; [0014]
  • FIG. 8 shows a section along line VIII-VIII in FIG. 9; [0015]
  • FIG. 9 is a top view of that further embodiment; [0016]
  • FIG. 10 shows a section along line X-X in FIG. 11; and [0017]
  • FIG. 11 is a top view of that further embodiment. [0018]
  • As shown in particular in FIG. 1 the space holder comprises a closed jacket [0019] 1. The cross-section perpendicular to the longitudinal axis 2 of the jacket 1 is shaped in usual manner, in particular cylindrical, oval or kidney-shaped. In the manner shown in FIG. 1 the jacket 1 comprises diamond-shaped apertures 3, 4 having a longitudinal diagonal extending parallel to the jacket axis 2. Adjacent rows 3, 4 of such diamonds are mutually offset by half a diamond height. In this manner a grid is formed having webs 5, 6 intersecting at an acute angle and including equal angles with the longitudinal diagonal of the diamonds 3, 4. The upper edge 7 and the lower edge 8 both extend in a plane perpendicular to the longitudinal axis 2. The size of the diamonds 3, 4 and of the webs 5, 6 defining the diamonds is selected so that there is an integral number of diamonds in peripheral direction. The edges 7, 8 generate always an even number of V-shaped recesses 9, 10 or 9′, 10′, resp., formed by the respective diamond base in peripheral direction. Owing to the above-described geometry the respective edge is quasi centrically symmetric to a point on the longitudinal axis 2 lying in the plane of the edge.
  • The first embodiment of a [0020] member 11 forming a stop shown in FIG. 2 is formed as a plate-shaped ring. The outer contour of the ring 12 corresponds to the inner contour of the jacket 1. Its dimensions are selected so that it can be pressed into the interior of the jacket but may also be pressed out again if desired, i.e. there is a frictional fit between the ring and the jacket 1. Equidistant projecting noses 15 are provided at the outer edge of the ring 12 in peripheral direction. The distance between two noses in peripheral direction equals the distance between two peripherally adjacent V-shaped recesses 9, 10. The cross-dimensions of the noses 15 in the plane of the plate are such that the noses fit smoothly into the base of the V-shaped recesses 9, 10. The length of the projecting noses corresponds to about the wall thickness of the associated jacket.
  • In use the jacket [0021] 1 is brought to the desired length by severing the upper edge 7 and the lower edge 8. Then one ring 12 is pressed into the interior of the jacket at the upper end and a second ring is pressed into the jacket interior at the lower end in such a manner that the noses 15 of the rings engage the corresponding basis of the associated V-shaped recesses 9, 10 and 9′, 10′, resp.
  • Owing to the integral number of the V-shaped recesses and the central symmetry resulting therefrom one and the [0022] same member 11 may be used irrespective of the severing at the edge 7 or at the lowered edge 7′ indicated in broken lines. If the edge is formed at the location 7′ rather than at the location 7, then the ring 12 is inserted after rotation around its longitudinal axis, whereby using only one kind of rings the stock-keeping is reduced and the operation is simplified.
  • FIG. 3 shows a [0023] member 13 of a modified embodiment. Again it is a plate wherein the holes are formed by bore-shaped holes 14 distributed over the plate. All further features correspond to the member 11.
  • The FIGS. 4 and 5 show a [0024] member 16 according to a third embodiment. This member again comprises a plate which corresponds to the embodiment shown in FIG. 3 as regards the holes 14 and the noses 15. An outer ring 17 is arranged around the plate. As best shown in FIG. 5, the outer ring has a ring wall extending perpendicular to the plane of the plate and therefore parallel to the outer surface of the jacket 1. The length of the noses 15 is selected so as to be longer than the thickness of the jacket 1 just by an amount to form a clearance 18 between the plate, the noses and the ring which allows pushing the member onto the corresponding free end 7, 8 of the jacket 1 to fit the noses 15 into the base of the respective corresponding V-shaped recesses 9, 10, 9′, 10′. The inner surface of the ring 17 then sits close to the outer surface of the jacket 1.
  • In the FIGS. 6 and 7 a [0025] member 19 according to a further embodiment is shown. It has a plate-shaped ring 12 which is identical with the ring shown in FIG. 2. As best shown in FIG. 6 an edge portion 20 having an outer contour which corresponds to the inner contour of the jacket 1 is provided on one surface of this ring and the free end of the edge portion 20 opposite to the plate 12 has equidistant prongs 21 in circumferential direction. The height of the prongs 21 above the plate 12 is so that when inserted the prongs extend beyond the edge 7 or 8, resp., of the jacket 1 almost to their base.
  • The embodiment of a [0026] member 22 shown in FIGS. 8 and 9 differs from the previously described embodiment only in that the base of the prongs is not in a plane parallel to the plate 12, but in a plane which is inclined with respect to the plate 12. The edge formed by the prongs lies also in a plane which is inclined with respect to the plate plane of the ring 12. The inclination is preferably between 8 and 10°.
  • The embodiment of the [0027] member 24 shown in FIGS. 10 and 11 differs from the embodiment according to FIGS. 8 and 9 in that the edge portion 20 is inclined with respect to the plane of the plate, i.e. with an angle other than 90° with respect to the plate plane of the ring 12.
  • In operation both embodiments, i.e. the [0028] members 19 and 22, resp., are inserted into the jacket in the same manner as the previously described embodiments so that the projecting noses 15 of the ring 12 lie in the lowermost parts of the V-shaped recesses 9, 10 and the prongs extend outwardly beyond the edge of the jacket. In the embodiment shown in FIGS. 6 and 7 the prongs 21 or 21′ may be cut to different lengths, for example along the broken line 23 to form a wedge-shaped insert. Similarly the edge of the member 22 can be cut so that the predetermined angle between the outer egde and the plate-shaped ring 12 is varied. In this manner it is possible to obtain, using few basic members, space holders having different wedge angles.
  • The outer contour of the [0029] respective rings 12 and 13 is, of course, determined as a function of the respective inner contour of the associated jacket.
  • According to modifications of the above-described particularly preferred embodiments the recesses of the edge may have other shapes in place of the V-shape, for example U-shaped or slit-shaped recesses. [0030]

Claims (15)

1. Space holder, in particular for a vertebra or an intervertebral disk, comprising a jacket (1) having apertures and a first and second edge (7, 8) as well as adjacent recesses (9, 10; 9′, 10′) arranged in peripheral direction and each extending in direction towards the other edge and a stop provided at at least one of the ends at a distance from the outer edge,
characterized in that the stop is formed by a member (11, 13, 16, 19, 22) having an outer contour corresponding to the inner contour of the jacket (1) and comprising nose-shaped projections (15) at locations of its periphery corresponding to the recesses (9, 10; 9′, 10′) for engaging the recesses.
2. Space holder according to
claim 1
, characterized in that the recesses are each formed as V-shaped recesses (9, 10; 9′, 10′) having equal distances from each other.
3. Space holder according to
claim 1
 or
2
, characterized in that the outer periphery is dimensioned so that the member (11, 13, 16, 19, 22) is held by friction fit in the jacket (1).
4. Space holder according to any of the
claims 1
 to
3
, characterized in that the jacket (1) is made as a grid having diamond-shaped apertures (3, 4).
5. Space holder according to
claim 4
, characterized in that one diagonal of each diamond (3, 4) extends parallel to the longitudinal axis (2) of the space holder.
6. Space holder according to any of the
claims 1
 to
5
, characterized in that the member (11, 13, 16) is formed as a plate.
7. Space holder according to
claim 6
, characterized in that the plate (12) is ring-shaped.
8. Space holder according to
claim 6
, characterized in that the plate (13) comprises a plurality of adjacent holes (14).
9. Space holder according to any of the
claims 6
 to
8
, characterized in that the length of the noses (15) is at least equal to the wall thickness of the jacket (1).
10. Space holder according to
claim 9
, characterized in that an outer ring (17) extending around the member (13) and having a contour corresponding to the outer contour of the jacket (1) is provided at the outer edges of the noses (15).
11. Space holder according to
claim 10
, characterized in that the outer ring (17) is connected with the noses (15) along its center line.
12. Space holder according to any of the
claims 1
 to
11
, characterized in that a serrated edge (21, 21′) projecting beyond the free end of the jacket (1) is provided at the side of the member facing the adjacent end.
13. Space holder according to
claim 12
, characterized in that the serrated edge extends parallel to the plate (12).
14. Space holder according to
claim 12
, characterized in that the serrated edge extends obliquely to the plate (12).
15. Space holder according to any of the
claims 1
 to
14
, characterized in that the edge comprises an even number of equidistant recesses.
US09/386,885 1995-02-14 1999-08-31 Space holder, in particular for a vertebra or an intervertebral disk Abandoned US20010014826A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US09/386,885 US20010014826A1 (en) 1995-02-14 1999-08-31 Space holder, in particular for a vertebra or an intervertebral disk

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19504867.9 1995-02-14
DE19504867A DE19504867C1 (en) 1995-02-14 1995-02-14 Position retainer for spine
US08/581,149 US5702451A (en) 1995-02-14 1995-12-29 Space holder, in particular for a vertebra or an intervertebral disk
US08/936,403 US5972031A (en) 1995-02-14 1997-09-25 Space holder in particular for a vertebra or an intervertebral disk
US09/386,885 US20010014826A1 (en) 1995-02-14 1999-08-31 Space holder, in particular for a vertebra or an intervertebral disk

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US08/936,403 Division US5972031A (en) 1995-02-14 1997-09-25 Space holder in particular for a vertebra or an intervertebral disk

Publications (1)

Publication Number Publication Date
US20010014826A1 true US20010014826A1 (en) 2001-08-16

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US08/581,149 Expired - Lifetime US5702451A (en) 1995-02-14 1995-12-29 Space holder, in particular for a vertebra or an intervertebral disk
US08/936,403 Expired - Lifetime US5972031A (en) 1995-02-14 1997-09-25 Space holder in particular for a vertebra or an intervertebral disk
US09/386,885 Abandoned US20010014826A1 (en) 1995-02-14 1999-08-31 Space holder, in particular for a vertebra or an intervertebral disk

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US08/581,149 Expired - Lifetime US5702451A (en) 1995-02-14 1995-12-29 Space holder, in particular for a vertebra or an intervertebral disk
US08/936,403 Expired - Lifetime US5972031A (en) 1995-02-14 1997-09-25 Space holder in particular for a vertebra or an intervertebral disk

Country Status (8)

Country Link
US (3) US5702451A (en)
EP (1) EP0727196B1 (en)
JP (1) JP3089201B2 (en)
KR (1) KR100395192B1 (en)
AT (1) ATE171857T1 (en)
CA (1) CA2169233A1 (en)
DE (2) DE19504867C1 (en)
ES (1) ES2124489T3 (en)

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ATE171857T1 (en) 1998-10-15
JP3089201B2 (en) 2000-09-18
US5972031A (en) 1999-10-26
KR960030900A (en) 1996-09-17
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US5702451A (en) 1997-12-30
EP0727196A1 (en) 1996-08-21
EP0727196B1 (en) 1998-10-07
KR100395192B1 (en) 2004-01-07
DE19504867C1 (en) 1996-02-29
DE59503854D1 (en) 1998-11-12
JPH08238266A (en) 1996-09-17
CA2169233A1 (en) 1996-08-15

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