EP1906870A1 - Support pour protheses intervertebrales - Google Patents

Support pour protheses intervertebrales

Info

Publication number
EP1906870A1
EP1906870A1 EP06754437A EP06754437A EP1906870A1 EP 1906870 A1 EP1906870 A1 EP 1906870A1 EP 06754437 A EP06754437 A EP 06754437A EP 06754437 A EP06754437 A EP 06754437A EP 1906870 A1 EP1906870 A1 EP 1906870A1
Authority
EP
European Patent Office
Prior art keywords
intervertebral
arrangement according
holder
opening
prostheses
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.)
Withdrawn
Application number
EP06754437A
Other languages
German (de)
English (en)
Inventor
Arnold Keller
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.)
Cervitech Inc
Original Assignee
Cervitech Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cervitech Inc filed Critical Cervitech Inc
Publication of EP1906870A1 publication Critical patent/EP1906870A1/fr
Withdrawn legal-status Critical Current

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
    • A61F2/0095—Packages or dispensers for prostheses or other implants
    • 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
    • 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
    • A61F2002/3082—Grooves
    • 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
    • A61F2002/443—Intervertebral or spinal discs, e.g. resilient made of articulated components having two transversal endplates and at least one intermediate component

Definitions

  • the invention relates to an arrangement comprising a holder for intervertebral prostheses and intervertebral prostheses in different widths, which consist of two end plates with a ventral flange and a joint core arranged therebetween, wherein the holder has a support plate with an opening for receiving one of the intervertebral prostheses whose width is greater as the maximum width of the intervertebral prostheses.
  • intervertebral prostheses it is known to arrange intervertebral prostheses in a holder, from which they are removed by the surgeon for implantation (EP-AI 504 733).
  • the intervertebral prostheses are removed from the holder by means of a special insertion instrument designed for implantation of the intervertebral prostheses.
  • Intervertebral prosthesis and insertion instrument have interlocking projections and recesses in order to achieve a positionally accurate fixation of the intervertebral prosthesis on the insertion instrument. So that the intervertebral prostheses can be precisely recorded with the insertion instrument, the intervertebral prostheses are arranged in a special holder. This is precisely tailored to the dimensions of the respective intervertebral prosthesis.
  • the invention is based on the object to provide an arrangement of an intervertebral prosthesis and a holder for intervertebral prostheses, which allows easier handling even with intervertebral prostheses of different sizes.
  • a holder for intervertebral prostheses and intervertebral prostheses are provided with different widths, which consist of two end plates with a ventral flange and a hinge core arranged therebetween, wherein the holder comprises a base and a support plate with at least one opening formed for receiving one of the intervertebral prostheses whose width is larger than the maximum width of the intervertebral prosthesis, which is provided according to the invention that at least one longitudinal edge of the opening, a pair of steps is formed, the mutually facing flanks are spaced so that the ventral flange of the inserted into the opening intervertebral prosthesis is centered.
  • the opening of the holder according to the invention is dimensioned in its width so that intervertebral prostheses with different widths can be inserted into the opening.
  • This is a magazine-like designed conventional holder with rows arranged openings of different widths for different sized intervertebral prostheses no longer required. Even with a Swisswirbelprothese lesser width, in the Holder according to the invention is used, a positionally accurate
  • the invention provides for the pair of stages arranged on the longitudinal edges. It is designed so that the distance of the mutually facing edges of the pair of steps is matched to the width of the ventral flange on the end plates of the intervertebral prosthesis. Under coordinated here is understood that the distance corresponds to the width of the flange plus any slight play for easy insertion and removal.
  • the intervertebral prostheses are thus fixed in position over their ventral flange position. This ensures that the intervertebral prostheses are accommodated in the holder centered in the opening, regardless of their width. It is therefore sufficient that the holder has only a single opening, and no longer as in the known from the prior art magazine-like holder a plurality of openings for
  • Intervertebral prostheses in different widths allows a compact and space-saving and easy-to-use design of the holder. Since variants for different width intervertebral prostheses thanks to the invention are not required, the holder of the invention is excellent for mass production. It can be designed as a disposable item, which brings in particular advantages in terms of postoperative handling and the need for sterilization after surgery.
  • the pair of steps is preferably formed as a pair of protrusions. But this is not mandatory. It can also be provided that the pair of steps is formed by means of a recess extending between them. Such, as it were sunk arrangement of the pair of steps has the advantage that the opening with the intervertebral prosthesis inserted level at the same time from one on the support plate arranged covering means can be closed. This makes it possible to sterilize the intervertebral prosthesis in the preferably closed holder.
  • the intervertebral prostheses can have different heights. As a rule, this is done by using joint cores of different thicknesses. Since the surgeon often in advance of the operation does not know exactly what height of intervertebral prostheses is required, it is advantageously provided that the holder according to the invention has a second opening with different heights. The surgeon can thus be offered an enlarged choice with only slightly larger holder. It is not mandatory that the height of the opening corresponds exactly to the height of the intervertebral prosthesis. It can also be provided a filler, which compensates for any height difference.
  • the facing flanks of the pair of steps may be performed perpendicular to the plane of the support plate. Conveniently, however, they are inclined relative to the vertical, by an angle of about 5 to 15 degrees, preferably about 10 degrees. This ensures that the distance between the flanks of the pair of steps tapers conically towards the support plate. This facilitates insertion of the intervertebral prosthesis into the holder according to the invention.
  • the conicity is expediently dimensioned such that at the narrowest point the distance corresponds exactly to the width of the ventral flange.
  • the removal of the intervertebral prosthesis can be simplified by means of an instrument.
  • the pairs of steps are made in one piece with the articles.
  • the opening in the support plate can be executed closed back and act as a substructure.
  • the intervertebral prosthesis used in the holder is protected from damage or contamination.
  • a covering means may be provided. Adhesives or even sealed films are particularly suitable as covering agents. This allows sterile packaging of the intervertebral prosthesis in the holder according to the invention.
  • the support plate and the base can be joined from several parts, but they can also be made in one piece.
  • the latter is particularly suitable for producing the support plate and the substructure by deep-drawing a fl exible material, such as thermoplastic. This allows a particularly efficient production of the holder according to the invention can be achieved.
  • the holder may be designed as a disposable product.
  • Figure 1 is a plan view of a first embodiment of the inventive arrangement with a holder and an intervertebral prosthesis inserted therein.
  • FIG. 2 is an enlarged front view of the holder shown in FIG. 1;
  • FIG. 1 is a plan view of a first embodiment of the inventive arrangement with a holder and an intervertebral prosthesis inserted therein.
  • FIG. 2 is an enlarged front view of the holder shown in FIG. 1;
  • FIG. 2 is an enlarged front view of the holder shown in FIG. 1;
  • FIG. 2 is an enlarged front view of the holder shown in FIG. 1;
  • FIG. 1 is a plan view of a first embodiment of the inventive arrangement with a holder and an intervertebral prosthesis inserted therein.
  • FIG. 2 is an enlarged front view of the holder shown in FIG. 1;
  • FIG. 1 is a plan view of a first embodiment of the inventive arrangement with a holder and an intervertebral prosthesis inserted therein.
  • Fig. 3 is a bottom view of the holder shown in Fig. 1;
  • Fig. 4 is a perspective and a plan view of the intervertebral prosthesis
  • FIG. 5 shows a plan view of a second embodiment of the arrangement according to the invention.
  • Fig. 6 is a section along the line VI-VI of Fig. 5;
  • Fig. 7 shows a third embodiment in a Fig. 6 similar representation.
  • FIG. 1 A first exemplary embodiment of the invention with a holder 1 and an inserted intervertebral prosthesis 2 is shown in FIG. 1, the holder 1 alone in FIGS. 2 and 3 and the intervertebral prosthesis alone in FIG. 4.
  • the holder 1 comprises a support plate 10 made of a metal material, for example. Stainless steel. This plate is of cuboid shape and has such dimensions that in the illustrated embodiment it can carry two openings 12 for receiving the intervertebral prostheses 2.
  • the support plate rests on a base 11 which is formed as four cylindrical feet.
  • the intervertebral prosthesis 2 consists of two end plates 21, 22 and arranged therebetween Prosthesis core 20. This forms with the two end plates
  • the prosthesis 2 is variable in size. In height, this is done by differently thick prosthesis cores 20. In width this is done by end plates 21, 22 with different width dimension B.
  • the end plates 21, 22 along their ventral edge (in Fig. 4, right) each have a flange 23, 24 , It is in each case in the prosthesis core opposite, to the plant to the vertebral body (not shown) specific page by a certain supernatant before.
  • the width of the flanges 23, 24 is smaller than the width dimension B of the end plates 21 and is constant in intervertebral prostheses 2 of different widths.
  • the flange 23 includes in its side surfaces a continuous longitudinal groove 25.
  • the flange 24 has in each case a bore 26 in its side surfaces 28. It serves to receive a pin of the insertion instrument. Via the bore 26 and the slot 25, the intervertebral prosthesis 2 can be held in a form-fitting manner and in a defined position on the insertion instrument.
  • the holder 1 In order to store the intervertebral prosthesis prior to implantation and to reach the surgeon intraoperatively, the holder 1 is provided. It has the two openings 12, wherein at least one intervertebral prosthesis 2 is to be used. Each opening 12 is bounded by longitudinal edges 13 and transverse edges 14. The two openings 12 have different dimensions in the direction of the height of the intervertebral prosthesis 2. This serves to accommodate intervertebral prostheses 2 of different thickness. In Fig. 1, an intermediate vertebral prosthesis 2 of greater strength is inserted into the opening 12 shown on the left in the drawing. The length of the transverse edges 14 correlates with the strength of the used Intervertebral prosthesis 2 such that the
  • Intervertebral prosthesis is fixed in this direction.
  • the width of the openings 12 is selected so that it is at least as large as the largest width dimension B of the male intervertebral prosthesis 2. This ensures that the intervertebral prosthesis 2 is independent of their width in the opening 12 can be used.
  • the end plates 21, 22 with the prosthesis core 20 are almost completely immersed in the opening 12.
  • the end plates 21, 22 are only on their respective flange 23, 24 on the longitudinal edges 13 of the opening 12.
  • An intervertebral prosthesis with less than the maximum width is not fixed in the width direction by the dimensions of the opening 12. To those inserted into the opening 12
  • Interbody prosthesis 2 nevertheless defined to position, a pair of steps 17 is provided according to the invention. It has mutually facing flanks 18 which, in the illustrated embodiment, taper slightly towards the carrier plate 10. The distance between the mutually facing flanks 18 is matched to the width of the flange 24. In the illustrated conical shape of the flanks 15 of the pair of steps 17, this is done in such a way that the distance at the transition of the flanks 18 to the support plate 10 corresponds to the nominal size of the width of the flange 24 exactly. The intervertebral prosthesis 2 inserted into the opening 12 then sits tightly between the pair of steps 17.
  • the conicity of the flanks 18 allows a simplified insertion of the intervertebral prosthesis 2 in the opening 12 of the holder 1, even in the case of a tight fit.
  • guide attachments 15 are arranged. They have at their inner sides facing each other on a guide groove 16 which is in alignment with the transverse edges 14 and the respective ends of the longitudinal edges 13.
  • the guide channel 16 serves to guide the tip of the insertion instrument when removing the intervertebral prosthesis 2 from the holder 1 such that its projections formed as a pin and strip in the slot-like recess 25 and the bore 26 of the flanges 23, 24 engage. Since the prosthesis is positioned centered in the opening 12 thanks to the invention, the recording of the intervertebral prosthesis 2 with the insertion instrument succeeds quickly and without repositioning the intervertebral prosthesis 2 or the instrument.
  • a second embodiment is shown in Figs. 5 and 6. It differs from the first embodiment shown in FIGS. 1 to 3 substantially in that it is made of a sheet-like material. It may be, for example, deep-drawn sheet steel or an autoclavable plastic.
  • the web 30 of the holder 3 is shaped so that two pocket-like openings 32 result. Unlike in the first embodiment, the openings 32 are closed downwardly and sideways.
  • Another difference from the first embodiment is that the longitudinal edges 33 are executed sunk. They are not aligned with the upper level of the web material 30, but are sunk by an amount about the strength of the flanges 23, 24 corresponding amount.
  • the depth of the openings 32 is dimensioned such that, despite the sunken longitudinal edges 33, the intervertebral prosthesis 2 can be completely accommodated.
  • At least one longitudinal edge 33 of each opening 32 a pair of steps 37 is arranged. In this area, the longitudinal edge 33 is not sunk.
  • the pair of steps 37 is formed with its flanks 38. The flanks 38 have such a distance, which corresponds to the width of the flange 24.
  • intervertebral prostheses of different width dimension B can be inserted into the openings 32, the side surfaces 28 of the flange 24 coming into contact with the flanks 38 of the pair of steps so as to center the intervertebral prosthesis 2 in the opening 32 ,
  • a sterile storage is possible thanks to the recessed arrangement of the intervertebral prosthesis 2.
  • a cover sheet 39 is provided, which extends over the upper, acting as a support plate 30 part of the web material from one to the opposite end, that the two openings 32 are covered.
  • a third embodiment is shown, which is a modification of the second embodiment shown in FIGS. 5 and 6. Both have in common that the holder is made of a sheet material. In the case of the holder 4 shown in FIG. 7, however, the web material 40 is deformed so that both closed recesses and openings 42 are formed, as well as tower-like attachments 45 with a guide 46, and a pair of steps 47 for centering the intervertebral prosthesis 2 in the openings 42.
  • two openings 12, 32, 42 are each provided in a holder 1, 3, 4. These Number has proved to be particularly advantageous for practical handling, since with two different heights most of the conditions encountered during the operation can be covered. However, it should not be ruled out to provide holders with a different number of openings. Especially for as a disposable holder made of thermoformed sheet material 30 executed holder 3 may also offer an embodiment with only one opening 32.

Landscapes

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

Abstract

L'invention concerne un ensemble comprenant un support (1, 3, 4) pour des prothèses intervertébrales, ainsi que des prothèses intervertébrales (2) de largeur différente qui sont constituées de deux plaques terminales (21, 22) à collerette ventrale (23, 24) et d'un noyau articulé (20) placé entre elles. Le support (1, 3, 4) présente une plaque d'appui (10, 30, 40) munie d'une ouverture (12, 32, 42) qui reçoit une des prothèses intervertébrales (2) et dont la largeur est supérieure à la largeur maximale des prothèses intervertébrales (2). Selon l'invention, on réalise, sur au moins une arête longitudinale (13) de l'ouverture (12, 32, 42), une paire d'échelons (17) dont les flancs (18) orientés l'un vers l'autre sont écartés de manière à centrer la collerette (24) d'une prothèse intervertébrale (2) insérée dans l'ouverture (12, 32, 42). On peut ainsi insérer des prothèses intervertébrales (2) de largeur différente dans les ouvertures (12, 32, 42) et les maintenir centrées dans les ouvertures (12, 32, 42) indépendamment de leur largeur réelle.
EP06754437A 2005-06-21 2006-06-19 Support pour protheses intervertebrales Withdrawn EP1906870A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202005009755U DE202005009755U1 (de) 2005-06-21 2005-06-21 Halter für Zwischenwirbelprothesen
PCT/EP2006/005866 WO2006136356A1 (fr) 2005-06-21 2006-06-19 Support pour protheses intervertebrales

Publications (1)

Publication Number Publication Date
EP1906870A1 true EP1906870A1 (fr) 2008-04-09

Family

ID=34983506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06754437A Withdrawn EP1906870A1 (fr) 2005-06-21 2006-06-19 Support pour protheses intervertebrales

Country Status (15)

Country Link
US (1) US20070000802A1 (fr)
EP (1) EP1906870A1 (fr)
JP (1) JP2008543459A (fr)
KR (1) KR20080025161A (fr)
CN (1) CN101340857A (fr)
AR (1) AR056390A1 (fr)
AU (1) AU2006261190A1 (fr)
BR (1) BRPI0611867A2 (fr)
CA (1) CA2612064A1 (fr)
DE (1) DE202005009755U1 (fr)
IL (1) IL188020A0 (fr)
MX (1) MX2007016428A (fr)
RU (1) RU2008100286A (fr)
WO (1) WO2006136356A1 (fr)
ZA (1) ZA200800465B (fr)

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RU2008100286A (ru) 2009-07-27
AU2006261190A1 (en) 2006-12-28
AR056390A1 (es) 2007-10-10
US20070000802A1 (en) 2007-01-04
CA2612064A1 (fr) 2006-12-28
MX2007016428A (es) 2008-03-06
BRPI0611867A2 (pt) 2010-10-05
IL188020A0 (en) 2008-03-20
DE202005009755U1 (de) 2005-09-08
WO2006136356A1 (fr) 2006-12-28
CN101340857A (zh) 2009-01-07
KR20080025161A (ko) 2008-03-19
JP2008543459A (ja) 2008-12-04
ZA200800465B (en) 2008-12-31

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