AU2004266431A1 - Intervertebral disk prosthesis - Google Patents

Intervertebral disk prosthesis Download PDF

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Publication number
AU2004266431A1
AU2004266431A1 AU2004266431A AU2004266431A AU2004266431A1 AU 2004266431 A1 AU2004266431 A1 AU 2004266431A1 AU 2004266431 A AU2004266431 A AU 2004266431A AU 2004266431 A AU2004266431 A AU 2004266431A AU 2004266431 A1 AU2004266431 A1 AU 2004266431A1
Authority
AU
Australia
Prior art keywords
prosthesis
intervertebral disk
cover plate
angle
profile
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.)
Granted
Application number
AU2004266431A
Other versions
AU2004266431B2 (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 AU2004266431A1 publication Critical patent/AU2004266431A1/en
Application granted granted Critical
Publication of AU2004266431B2 publication Critical patent/AU2004266431B2/en
Anticipated expiration legal-status Critical
Ceased 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
    • A61F2/02—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
    • 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
    • A61F2002/30383—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove
    • A61F2002/30387—Dovetail connection
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30517—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a locking plate
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30576—Special structural features of bone or joint prostheses not otherwise provided for with extending fixation tabs
    • A61F2002/30578—Special structural features of bone or joint prostheses not otherwise provided for with extending fixation tabs having apertures, e.g. for receiving fixation screws
    • 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
    • A61F2002/30904—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves serrated profile, i.e. saw-toothed
    • 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
    • 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

Landscapes

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

Description

Cervitech, Inc. CERTO26PWO D/so 5 Intervertebral disk prosthesis A known type of intervertebral disk prosthesis (WO 01/01893) has two metal cover plates and a polyethylene prosthesis core which forms a pair of slide surfaces 10 with one of the two cover plates and is fixed on the other cover plate. For this fixing, the cover plate is provided with edge ridges whose undercut connection profile cooperates with a complementary connection profile on the underside of the prosthesis core. On the 15 right and left lateral edges of the cover plate and of the prosthesis core, such connection profiles are provided parallel to one another. In addition, there is one such profile running in a straight line on the dorsal edge of the cover plate and of the prosthesis 20 core. There is no such profile on the ventral edge, with the result that the prosthesis core can be pushed into the connection profiles of the cover plate from the ventral direction. The prosthesis core is secured in the assembled position by a pair of locking elements 25 provided on the ventral edge. Although the connection profiles are produced almost free of play, an important concern in prosthesis production is to ensure that, even in the case of production tolerances, it is possible to rule out any movement of the prosthesis 30 core relative to the cover plate holding it. In particular, rotation movements of the prosthesis core relative to the cover plate holding it must be ruled out. 35 The prior art gives no indications as to how this problem could be solved. FR-A-2718635 discloses connection profiles only on parallel, lateral edges of the cover plate. They are absent in all the nonlateral - 2 and nonparallel edge areas. For knee prostheses, FR-A 2632516 discloses the fixing of a polyethylene part in a retaining profile by means of horseshoe-shaped connection profiles, but this does not afford any 5 guarantee that the nonparallel sections of the connection profiles will also remain in engagement with one another. For a shoulder prosthesis, FR-A-2780635 discloses the fixing of a polyethylene part on a retaining part by means of connection profiles 10 extending exclusively at an angle with respect to one another. This cannot be adapted to the shape requirements of an intervertebral disk prosthesis. The invention has recognized that the problem with 15 intervertebral disk prostheses can be solved by the special arrangement of the connection profiles given in claim 1. Accordingly, provision is made that the connection profiles include at least one pair of connection profile sections which are symmetrical with 20 respect to the AP direction and are arranged at an angle to one another. AP direction signifies the anteroposterior direction. The profile sections arranged at an angle to one another according to the invention create a triangular configuration which 25 counteracts twisting of the prosthesis core relative to the cover plate if play exists between the connection profiles of the cover plate and of the prosthesis core. The connection profiles can basically be made up exclusively of such profile sections arranged at an 30 angle to one another. However, these can also be provided additionally to connection profiles arranged in parallel on the lateral edges of the cover plate and of the prosthesis core. They are intended to run in a substantially straight line and are preferably arranged 35 at least on the dorsal side. The angle between the profile sections arranged at an angle to one another should not be greater than 1500. The limit preferably lies for example at 1400.
- 3 The invention is explained in more detail below with reference to the drawing which depicts an advantageous illustrative embodiment and in which: 5 Fig. 1 shows a perspective view of the end plate with the prosthesis core secured on it, Figs 2 to 4 show different views of the same end 10 plate without prosthesis core, and Figs 5 and 6 show perspective views of the prosthesis core. 15 The end plate 1, which is normally used as the lower end plate, has an approximately oval contour and comprises a toothed fastening surface 2 for bearing on the vertebral body and a flange 3 which comes to lie on the ventral side of the vertebral body and can be 20 screwed to the latter via screw holes 4. On that side opposite the fastening surface 2, the one normally lying to the top, the cover plate 1 forms a support for the prosthesis core 5. This support consists of a plane surface 6 and, surrounding the latter, an edge 7 which 25 is composed of two parallel sections 7' on the lateral sides of the plate and of a dorsal edge 7'' . The outer contour of the edge 7 corresponds to the oval contour of the cover plate. On its side facing toward the surface 6, the edge is provided with a profile ridge 8 30 and, below the latter, with an undercut 8'. The connection profile thereby formed on the inner side of the edge 7 runs in a straight line in the lateral sections 7' and parallel on both sides. In the dorsal section 7'', the connection profile is composed of two 35 sections 9. In each of these sections, the connection profile runs in a straight line. The profiles of both sections are arranged symmetrically with respect to the AP axis 10 of the implant and enclose an angle a which, in the example shown, is 1400.
-4 The top of the edge 7 forms a plane surface 6' which runs parallel to the support surface 6 and likewise forms a support surface for the prosthesis core. 5 The flange 3 of the cover plate has a slit 11 which runs perpendicular to the connection profile 6 and whose function is explained later. 10 On its top 12, the prosthesis core 5 forms a slide surface which cooperates with the second cover plate (not shown) to form a hinge. The contour of the prosthesis core is identical to that of the cover plate 1. On its underside, it has a plane surface 13 which is 15 intended to bear on the support surface 6 of the end plate 1 and has substantially the same contour shape. It is limited by a connection profile which is formed by a profile ridge 14 and an undercut 14' . This connection profile corresponds in a complementary 20 manner to the connection profile 8, 9 of the edge ridge 7 of the cover plate 1. In particular, the connection profile is composed of two lateral sections 15 and two dorsal sections 16 which correspond respectively to the lateral and dorsal sections of the edge 7 of the cover 25 plate 1 and can cooperate with these in a form-fitting manner. Outside the connection profile 14, 14', on the underside of the prosthesis core 5 there is a plane 30 surface 17 which corresponds to the support surface 6' on the top of the edge 7 of the cover plate 1 and cooperates with this when the prosthesis core is mounted on the cover plate 1. 35 The prosthesis is assembled by means of the prosthesis core being pushed with its connection profile 14, 14' into the corresponding connection profiles 8, 8' from the direction of the open ventral side. When the prosthesis core has been pushed in fully, its profile - 5 ridge 14 fits, not only in the area of the lateral sections 7' but also in the area of the dorsal section 7'', into the undercut 8' of the edge 7 of the cover plate, the connection profiles lying on one another 5 with substantially full-surface contact. At the location where the slit 11 is situated in the gap 3, the prosthesis core has a groove 18 which is flush with the gap 11 when the prosthesis core has 10 reached its end position in which the dorsal connection profiles abut one another. A plate (not shown) is pushed into the gap 11 and the groove 18 and secures the prosthesis core in this position relative to the cover plate 1. The plate is in turn secured by means of 15 also having a bore at the location of the screw hole shown on the left in Fig. 3, through which bore a fastening screw extends. By virtue of the fact that the connection profiles of 20 the prosthesis core and of the cover plate are equipped, respectively, with the sections 9 and 16 which each form a triangle, it is possible, in comparison with known prostheses, to obtain increased stability of the position of the prosthesis core 25 relative to the cover plate 1. In particular, its stability with respect to relative movements in the sense of rotation is thereby increased.

Claims (5)

1. An intervertebral disk prosthesis with two cover plates and a prosthesis core (5) which is 5 connected to one of the cover plates (1) by means of connection profiles (8, 8', 14, 14') which are undercut in a complementary manner, characterized in that the connection profiles (8, 8', 14, 14') include at least one pair of profile sections (9, 10 16) which are symmetrical with respect to the AP direction (10) and are arranged at an angle to one another.
2. The intervertebral disk prosthesis as claimed in 15 claim 1, characterized in that the profile sections (9, 16) arranged at an angle to one another run in a substantially straight line.
3. The intervertebral disk prosthesis as claimed in 20 claim 1 or 2, characterized in that the profile sections (9, 16) arranged at an angle to one another are arranged on the dorsal side and are held in engagement by means (11, 18) arranged on the ventral side. 25
4. The intervertebral disk prosthesis as claimed in claim 3, characterized in that the profile sections (9, 16) arranged on the dorsal side are provided in addition to a pair of laterally 30 arranged profile sections (7').
5. The intervertebral disk prosthesis as claimed in claim 1 or 2, characterized in that the angle (a) between the profile sections (9, 16) arranged at 35 an angle to one another is not greater than 1500.
AU2004266431A 2003-07-21 2004-06-16 Intervertebral disk prosthesis Ceased AU2004266431B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP03016441.2 2003-07-21
EP03016441A EP1512384A1 (en) 2003-07-21 2003-07-21 Intervertebral disc prosthesis
PCT/EP2004/006484 WO2005018508A1 (en) 2003-07-21 2004-06-16 Intervertebral disk prosthesis

Publications (2)

Publication Number Publication Date
AU2004266431A1 true AU2004266431A1 (en) 2005-03-03
AU2004266431B2 AU2004266431B2 (en) 2009-06-11

Family

ID=34130027

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2004266431A Ceased AU2004266431B2 (en) 2003-07-21 2004-06-16 Intervertebral disk prosthesis

Country Status (17)

Country Link
EP (2) EP1512384A1 (en)
JP (1) JP2007533335A (en)
KR (1) KR20060056337A (en)
CN (1) CN100563603C (en)
AR (1) AR048854A1 (en)
AT (1) ATE389375T1 (en)
AU (1) AU2004266431B2 (en)
BR (1) BRPI0412782A (en)
CA (1) CA2531144A1 (en)
DE (1) DE502004006595D1 (en)
ES (1) ES2302000T3 (en)
IL (1) IL172608A0 (en)
MX (1) MXPA06000747A (en)
PL (1) PL1646337T3 (en)
RU (1) RU2340312C2 (en)
WO (1) WO2005018508A1 (en)
ZA (1) ZA200601352B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5198117B2 (en) * 2008-03-28 2013-05-15 富士フイルム株式会社 Curable composition for nanoimprint, fine pattern and method for producing the same, color filter, display device, and method for producing treated substrate
BE1024357B1 (en) * 2016-07-08 2018-02-06 Tfc Medical Sa Modular implant for corporectomy

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2632516B1 (en) * 1988-06-10 1991-02-01 Guy Esteve MONOCOMPARTIMENTAL KNEE PROSTHESIS COMPRISING A TIBIAL TRAY WITH A METAL SEAT
FR2718635B1 (en) * 1994-04-15 1996-07-05 Axcyl Medical Cervical prosthesis.
FR2780635B1 (en) * 1998-07-06 2000-10-20 Tornier Sa DEVICE FOR FIXING A PLASTIC INSERT
JP4192262B2 (en) * 1999-07-02 2008-12-10 スパイン ソリューションズ インコーポレイテッド Intervertebral implant

Also Published As

Publication number Publication date
EP1646337B1 (en) 2008-03-19
BRPI0412782A (en) 2006-09-26
RU2006105201A (en) 2006-06-10
AR048854A1 (en) 2006-06-07
CN100563603C (en) 2009-12-02
MXPA06000747A (en) 2006-03-30
ZA200601352B (en) 2006-09-27
ES2302000T3 (en) 2008-07-01
DE502004006595D1 (en) 2008-04-30
JP2007533335A (en) 2007-11-22
EP1512384A1 (en) 2005-03-09
RU2340312C2 (en) 2008-12-10
IL172608A0 (en) 2006-04-10
CA2531144A1 (en) 2005-03-03
EP1646337A1 (en) 2006-04-19
CN1826091A (en) 2006-08-30
ATE389375T1 (en) 2008-04-15
AU2004266431B2 (en) 2009-06-11
WO2005018508A1 (en) 2005-03-03
KR20060056337A (en) 2006-05-24
PL1646337T3 (en) 2008-08-29

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Date Code Title Description
FGA Letters patent sealed or granted (standard patent)
MK14 Patent ceased section 143(a) (annual fees not paid) or expired