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FR2785522A1 - Hip joint prosthesis has socket cup and metallic ring with angularly adjustable liner insert - Google Patents

Hip joint prosthesis has socket cup and metallic ring with angularly adjustable liner insert Download PDF

Info

Publication number
FR2785522A1
FR2785522A1 FR9814236A FR9814236A FR2785522A1 FR 2785522 A1 FR2785522 A1 FR 2785522A1 FR 9814236 A FR9814236 A FR 9814236A FR 9814236 A FR9814236 A FR 9814236A FR 2785522 A1 FR2785522 A1 FR 2785522A1
Authority
FR
France
Prior art keywords
ring
fixing
cup
prosthetic assembly
assembly according
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.)
Pending
Application number
FR9814236A
Other languages
French (fr)
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.)
NORT ON
Original Assignee
NORT ON
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 NORT ON filed Critical NORT ON
Priority to FR9814236A priority Critical patent/FR2785522A1/en
Publication of FR2785522A1 publication Critical patent/FR2785522A1/en
Pending legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/32Joints for the hip
    • A61F2/34Acetabular cups
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86Pins or screws or threaded wires; nuts therefor
    • A61B17/8605Heads, i.e. proximal ends projecting from bone
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8052Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
    • A61B17/8057Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded the interlocking form comprising a thread
    • AHUMAN NECESSITIES
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    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
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    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86Pins or screws or threaded wires; nuts therefor
    • AHUMAN NECESSITIES
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    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
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    • A61F2/30767Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
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    • A61F2/00Filters 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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    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/28Bones
    • A61F2002/2835Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
    • AHUMAN NECESSITIES
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    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The 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
    • A61F2002/30317The prosthesis having different structural features at different locations within the same prosthesis
    • A61F2002/30322The prosthesis having different structural features at different locations within the same prosthesis differing in surface structures
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The 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
    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331Connections 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
    • A61F2002/3036Protrusion and recess of kidney-shaped cross-section
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The 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
    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30383Connections 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
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
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    • A61F2002/30316The 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
    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30405Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by screwing complementary threads machined on the parts themselves
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    • A61F2002/30535Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30537Special structural features of bone or joint prostheses not otherwise provided for adjustable
    • A61F2002/30538Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting angular orientation
    • A61F2002/3054Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting angular orientation about a connection axis or implantation axis for selecting any one of a plurality of radial orientations between two modular parts, e.g. Morse taper connections, at discrete positions, angular positions or continuous positions
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    • A61F2002/30535Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30576Special structural features of bone or joint prostheses not otherwise provided for with extending fixation tabs
    • A61F2002/30578Special structural features of bone or joint prostheses not otherwise provided for with extending fixation tabs having apertures, e.g. for receiving fixation screws
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2220/00Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2220/00Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033Connections 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
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2250/00Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0026Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in surface structures
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2310/00Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005The prosthesis being constructed from a particular material
    • A61F2310/00011Metals or alloys
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2310/00Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00389The prosthesis being coated or covered with a particular material
    • A61F2310/00395Coating or prosthesis-covering structure made of metals or of alloys
    • A61F2310/00407Coating made of titanium or of Ti-based alloys
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2310/00Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00389The prosthesis being coated or covered with a particular material
    • A61F2310/00592Coating or prosthesis-covering structure made of ceramics or of ceramic-like compounds
    • A61F2310/00598Coating or prosthesis-covering structure made of compounds based on metal oxides or hydroxides
    • A61F2310/00604Coating made of aluminium oxide or hydroxides

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

Abstract

The hip joint prosthesis has a base socket cup (1) and a metallic ring (2). An angularly adjustable liner (3) receives a femoral head. The base cup has formations to allow formation of bone growth to anchor the socket. It also has fixings to retain and index the ring which has an aluminium covering.

Description

ENSEMBLE PROTHETIQUE POUR L'ARTICULATION
DE LA HANCHE
L'invention se rattache au secteur technique des implants orthopédiques, notamment des implants cotyloïdiens.
JOINT PROSTHETIC ASSEMBLY
HIP
The invention relates to the technical sector of orthopedic implants, in particular acetabular implants.

Il est notoirement connu d'utiliser, pour remplacer l'articulation naturelle de la hanche, des implants prothétiques coopérant avec le fémur et la cavité cotyloïdienne de l'os iliaque. Au niveau de la cavité cotylodïenne, l'implant présente un anneau destiné à tre fixé dans le fond de cette cavité, soit au moyen de ciment, soit au moyen de vis. It is well known to use, to replace the natural hip joint, prosthetic implants cooperating with the femur and the acetabulum of the iliac bone. At the level of the acetabular cavity, the implant has a ring intended to be fixed in the bottom of this cavity, either by means of cement, or by means of screws.

Cet anneau reçoit, avec capacité d'articulation ou non, un noyau ou cupule en polyéthylène conformé pour recevoir, avec capacité d'articulation, une tte sphérique présentant, directement ou d'une manière rapportée, une tige apte à tre implantée dans le canal médullaire du fémur. This ring receives, with or without articulation capacity, a polyethylene core or cup shaped to receive, with articulation capacity, a spherical head having, directly or in an attached manner, a rod capable of being implanted in the channel. medullary of the femur.

Comme indiqué, l'anneau métallique est le plus souvent fixé dans le fond de la cavité cotyloïdienne. Toutefois, il existe des cas où la cavité cotyloïdienne est très endommagée, et ne peut donc plus faire office de support d'appui et de fixation pour l'anneau métallique. Dans un tel cas, il est nécessaire d'équiper préalablement la cavité cotyloïdienne d'un ensemble profilé de forme générale hémisphérique, généralement connu sous le nom de fond de cotyle. Ce fond de cotyle peut tre fixé au moyen de pattes et de vis au niveau du toit de la cavité cotyloïdienne et d'un crochet dans la partie opposée
La fixation de l'anneau métallique au niveau du fond de cotyle, cause de réels problèmes, soit au niveau de la mise en place en tant que telle par l'opérateur, soit au niveau de la qualité du résultat obtenu.
As indicated, the metal ring is most often fixed in the bottom of the acetabulum. However, there are cases where the acetabular cavity is very damaged, and can therefore no longer act as a support and attachment for the metal ring. In such a case, it is necessary to equip the acetabular cavity beforehand with a profiled assembly of generally hemispherical shape, generally known under the acetabulum bottom. This cup bottom can be fixed by means of lugs and screws at the level of the roof of the acetabular cavity and a hook in the opposite part.
The fixing of the metal ring at the level of the acetabulum, causes real problems, either at the level of the installation as such by the operator, or at the level of the quality of the result obtained.

Le problème que se propose de résoudre l'invention est d'obtenir une fixation simple et efficace de l'anneau par rapport au fond de cotyle avec la possibilité, pour l'opérateur, de combler la cavité cotyloïdienne au moyen de greffons osseux notamment. The problem which the invention proposes to solve is to obtain a simple and effective fixing of the ring with respect to the acetabulum base with the possibility, for the operator, of filling the acetabular cavity by means of bone grafts in particular.

Pour résoudre le problème posé, il a été conçu et mis au point un ensemble prothétique cotyloïdien du type de ceux comprenant -un fond de cotyle destiné à tre positionné dans le fond de la cavité
cotyloïdienne ; -un anneau métallique destiné à tre fixé en combinaison avec le fond de
cotyle ; -un noyau apte à tre monté notamment avec capacité d'orientation
angulaire, dans l'anneau, ledit noyau recevant une tte fémorale d'un
implant correspondant.
To solve the problem posed, it was designed and developed an acetabular prosthetic assembly of the type of those comprising -a cup bottom intended to be positioned in the bottom of the cavity
acetabulum; a metal ring intended to be fixed in combination with the bottom of
acetabulum; a core capable of being mounted in particular with orientation capacity
angular, in the ring, said core receiving a femoral head of a
corresponding implant.

Selon l'invention, le fond de cotyle présente des agencements de fixation et de positionnement dans la cavité cotyloïdienne et des agencements de fixation et d'indexation angulaire de l'anneau métallique, le fond de cotyle présentant une ouverture profilée pour permettre, après son positionnement dans la cavité cotyloïdienne et avant fixation de l'anneau, la mise en place de greffons osseux.  According to the invention, the cup bottom has fixing and positioning arrangements in the acetabular cavity and arrangements for fixing and angular indexing of the metal ring, the cup bottom having a profiled opening to allow, after its positioning in the acetabulum and before fixation of the ring, placement of bone grafts.

Pour résoudre le problème posé de faciliter la repousse osseuse, l'anneau présente au niveau de sa zone en communication avec l'ouverture du fond de cotyle, un revtement, notamment du type alumine. To solve the problem posed of facilitating bone regrowth, the ring has at its zone in communication with the opening of the cup bottom, a coating, in particular of the alumina type.

Pour résoudre le problème d'assurer la stabilité de l'anneau métallique par rapport au fond de cotyle, les agencements de fixation et d'indexation angulaire de l'anneau métallique sont constitués par une patte équerrée présentant un rail de guidage apte à coopérer avec une patte formée en débordement radial du bord circulaire de l'anneau, lesdites pattes étant percées pour l'engagement d'une vis de fixation coopérant avec le toit de la cavité cotyloïdienne.  To solve the problem of ensuring the stability of the metal ring with respect to the acetabulum bottom, the arrangements for fixing and angular indexing of the metal ring are constituted by a squared tab having a guide rail able to cooperate with a tab formed in radial overflow from the circular edge of the ring, said tabs being pierced for the engagement of a fixing screw cooperating with the roof of the acetabular cavity.

Le fond de cotyle et l'anneau présentent symétriquement et en correspondance, des trous pour l'engagement de vis destinées à coopérer avec l'ischion et le pubis en étant orientées d'une manière divergente. The cup bottom and the ring have symmetrically and in correspondence, holes for the engagement of screws intended to cooperate with the ischium and the pubis by being oriented in a divergent manner.

Pour résoudre le problème posé d'éviter tout phénomène de basculement et d'arrachement, les vis présentent une portée cylindrique filetée vissée dans un taraudage de trous de l'anneau et du fond de cotyle, ladite portée filetée étant prolongée par une portée tronconique apte à coopérer avec la cavité cotyloïdienne.  To solve the problem posed of avoiding any phenomenon of tilting and tearing, the screws have a threaded cylindrical seat screwed into a tapping of holes in the ring and the cup bottom, said threaded seat being extended by a tapered bearing suitable to cooperate with the acetabulum.

Avantageusement, les agencements de fixation et de positionnement du fond de cotyle, sont constitués, d'une part, par deux pattes radiales disposées angulairement et symétriquement, de part et d'autre de la patte de fixation de l'anneau et, d'autre part, par une patte faisant office de crochet disposée en regard desdites pattes et selon leur axe de symétrie, des vis étant engagées au travers de trous que présentent les différentes pattes. Advantageously, the arrangements for fixing and positioning the acetabulum base, consist, on the one hand, of two radial tabs arranged angularly and symmetrically, on either side of the ring fixing tab and, on the other hand, by a lug acting as a hook arranged opposite said lugs and along their axis of symmetry, screws being engaged through holes which have the different lugs.

L'invention est exposée ci-après plus en détail à l'aide des figures des dessins annexés dans lesquels :
-la figure 1 est une vue en perspective, avant montage, des
principaux éléments de l'ensemble cotyloïdien selon l'invention ;
-la figure 2 est une vue de dessus du fond de cotyle ;
-la figure 3 est une vue de dessus de l'anneau métallique ;
-la figure 4 est une vue de dessous correspondant à la figure ;
-la figure 5 est une vue en coupe longitudinale après montage des
éléments constitutifs de l'ensemble prothétique ;
-la figure 6 est une vue en coupe partielle considérée selon la ligne
6-6 de la figure 5 ;
-la figure 7 est une vue en coupe, à plus grande échelle, considérée
selon la ligne 7-7 de la figure 5
-la figure 8 montre le montage de l'ensemble cotyloïdien et sa
coopération avec un implant fémoral.
The invention is described below in more detail with the aid of the figures of the appended drawings in which:
FIG. 1 is a perspective view, before assembly, of the
main elements of the acetabular assembly according to the invention;
FIG. 2 is a top view of the cup bottom;
FIG. 3 is a top view of the metal ring;
FIG. 4 is a bottom view corresponding to the figure;
FIG. 5 is a view in longitudinal section after assembly of the
constituent elements of the prosthetic assembly;
FIG 6 is a partial sectional view taken along the line
6-6 of Figure 5;
FIG. 7 is a sectional view, on a larger scale, considered
along line 7-7 of figure 5
FIG. 8 shows the assembly of the acetabular assembly and its
cooperation with a femoral implant.

D'une manière connue, l'ensemble prothétique cotyloïdien comprend un fond de cotyle (1), un anneau métallique (2) et un noyau en polyéthylène (3) destiné à recevoir la tte sphérique (4) d'un implant fémoral (5).  In a known manner, the acetabular prosthetic assembly comprises an acetabulum base (1), a metal ring (2) and a polyethylene core (3) intended to receive the spherical head (4) of a femoral implant (5 ).

Le fond de cotyle (1) présente une forme générale hémisphérique creuse et est destiné à tre implanté dans la cavité cotyloïdienne de l'os iliaque. La cavité hémisphérique (la) du fond de cotyle (1) est destinée à recevoir l'anneau (2) de forme générale hémisphérique. Le noyau (3) est généralement réalisé en polyéthylène haute densité et destiné à tre monté dans la cavité creuse (2a) de l'anneau (2), soit de manière fixe, soit avec capacité de mobilité angulaire. The acetabulum base (1) has a generally hollow hemispherical shape and is intended to be implanted in the acetabular cavity of the iliac bone. The hemispherical cavity (la) of the cup bottom (1) is intended to receive the ring (2) of generally hemispherical shape. The core (3) is generally made of high density polyethylene and intended to be mounted in the hollow cavity (2a) of the ring (2), either fixedly, or with angular mobility capacity.

Le fond de cotyle (1) présente des agencements de fixation et de positionnement dans la cavité cotyloïdienne et des agencements d'indexation et de fixation angulaire de l'anneau métallique (2). Dans ce but, le bord circulaire du fond de cotyle (1) présente une patte équerrée (lb) présentant un rail de guidage (lbl) pour l'indexation angulaire d'une patte (2b) formée en débordement radial du bord circulaire de l'anneau (2.1). The acetabulum base (1) has fixing and positioning arrangements in the acetabular cavity and indexing and angular fixing arrangements for the metal ring (2). For this purpose, the circular edge of the cup bottom (1) has a squared tab (lb) having a guide rail (lbl) for the angular indexing of a tab (2b) formed in radial overflow from the circular edge of the 'ring (2.1).

L'une et l'autre des pattes (lb et 2b) sont percées de part en part, d'au moins un trou taraudé (lc-2c) pour l'engagement de vis (6), comme il sera indiqué dans la suite de la description.Both legs (lb and 2b) are drilled right through, at least one tapped hole (lc-2c) for the engagement of screws (6), as will be indicated below from the description.

En outre, le fond de cotyle (1) et l'anneau (2) présentent, symétriquement et en correspondance, des trous (ld, le) et (2d, 2e) pour l'engagement d'autres vis (6) destinées à coopérer avec l'ischion et le pubis en étant orientées d'une manière divergente. Les trous (Id, le) et (2d, 2e) sont établis de part et d'autre de l'axe de symétrie (x-x') du fond de cotyle et de l'anneau métallique (figures 3 et 4), à partir duquel sont établies les pattes de fixation (lb et 2b). In addition, the cup bottom (1) and the ring (2) have, symmetrically and in correspondence, holes (ld, le) and (2d, 2e) for the engagement of other screws (6) intended for cooperate with the ischium and pubis by being oriented in a divergent manner. The holes (Id, le) and (2d, 2e) are established on either side of the axis of symmetry (x-x ') of the cup bottom and of the metal ring (FIGS. 3 and 4), from which the fixing lugs (lb and 2b) are established.

Les différents trous (ld, le) et (2d, 2e) sont taraudés. Chacune des vis (6) présente une portée cylindrique filetée (6a) prolongée par une portée tronconique (6b). Les portées cylindriques filetées (6a) sont destinées à tre vissées dans les trous taraudés correspondant (2c-I c), (2d-1 d) et (2e, le) pour assurer, d'une manière concomitante, la liaison de l'anneau (2) par rapport au fond de cotyle (1). Les portées tronconiques (6b) coopèrent avec la cavité cotyloïdienne pour rendre solidaire le fond de cotyle (1).  The different holes (ld, le) and (2d, 2e) are tapped. Each of the screws (6) has a threaded cylindrical bearing surface (6a) extended by a frustoconical bearing surface (6b). The threaded cylindrical bearings (6a) are intended to be screwed into the corresponding tapped holes (2c-I c), (2d-1 d) and (2e, le) to ensure, in a concomitant manner, the connection of the ring (2) relative to the cup bottom (1). The frustoconical surfaces (6b) cooperate with the acetabulum cavity to make the acetabulum bottom (1) integral.

Les différents taraudages (2c, lc), (2d, Id) et (2e, le) sont exécutés ensemble pour assurer une parfaite continuité. Le rail de guidage (lbl) de la patte (lb) permet d'assurer une parfaite indexation angulaire de l'ensemble de l'anneau (2) par rapport au fond de cotyle (1).  The different threads (2c, lc), (2d, Id) and (2e, le) are executed together to ensure perfect continuity. The guide rail (lbl) of the tab (lb) ensures perfect angular indexing of the entire ring (2) relative to the cup bottom (1).

Le fond de cotyle (1) présente en outre deux pattes radiales (If, lg) disposées angulairement et symétriquement de part et d'autre de la patte de fixation (1 b). A l'opposé des deux pattes (1 et (1g) selon l'axe de symétrie (x-x') du fond de cotyle (1), c'est-à-dire en alignement coaxial avec la patte (Id) le fond de cotyle (1) présente une patte (lh) recourbée à son extrémité libre pour faire office de crochet. Chacune des pattes (If, 1g et lh) sont percées de part en part d'au moins un trou (li) pour l'engagement de vis pour assurer la fixation de l'ensemble du fond de cotyle au niveau du toit de cotyle, et de sa partie inférieure. The cup bottom (1) also has two radial lugs (If, lg) arranged angularly and symmetrically on either side of the fixing lug (1b). Opposite the two legs (1 and (1g) along the axis of symmetry (x-x ') of the cup bottom (1), that is to say in coaxial alignment with the leg (Id) the cup base (1) has a tab (lh) curved at its free end to act as a hook Each of the tabs (If, 1g and lh) are drilled right through at least one hole (li) for the 'screw engagement to ensure the attachment of the entire cup bottom at the cup roof, and its lower part.

Selon une autre caractéristique importante de l'invention, le fond de cotyle (1) présente une ouverture symétrique et profilée très sensiblement en forme de V (lj) destinée à permettre après positionnement du fond de cotyle (1) dans la cavité cotyloïdienne et avant fixation de l'anneau (2), la mise en place de greffons osseux. D'une manière correspondante, le noyau (2) présente, au niveau de sa zone (2f), en communication avec l'ouverture (lj) du fond de cotyle (1), un revtement (7) sélectionné pour favoriser la repousse osseuse. Ce revtement (7) peut par exemple tre du type alumine, titane poreux,...  According to another important characteristic of the invention, the cup bottom (1) has a symmetrical and profiled opening very substantially V-shaped (lj) intended to allow, after positioning of the cup bottom (1) in the acetabulum and before fixing the ring (2), placing bone grafts. Correspondingly, the core (2) has, at its zone (2f), in communication with the opening (lj) of the cup bottom (1), a coating (7) selected to promote bone regrowth . This coating (7) can for example be of the alumina, porous titanium type, etc.

A noter qu'après fixation, dans les conditions indiquées de l'anneau (2) au niveau du fond de cotyle (1), soit ce dernier est en contact direct et intime avec ledit fond de cotyle, soit apparaît un interstice réduit pour éviter tout phénomène éventuel de métalose. On renvoie à la figure 8 qui montre le montage de la tige fémorale (5) équipée d'une tte sphérique (4) coopérant avec le noyau en polyéthylène (3), lui-mme monté dans l'anneau métallique (2) fixé dans le fond de cotyle (1).  Note that after fixing, under the indicated conditions of the ring (2) at the level of the cup bottom (1), either the latter is in direct and intimate contact with said cup bottom, or a reduced gap appears to avoid any possible phenomenon of metalosis. We refer to Figure 8 which shows the mounting of the femoral stem (5) equipped with a spherical head (4) cooperating with the polyethylene core (3), itself mounted in the metal ring (2) fixed in the cup bottom (1).

Les avantages ressortent bien de la description.  The advantages are apparent from the description.

Claims (1)

REVENDICATIONS -1-Ensemble prothétique pour l'articulation cotyloïdienne comprenant : -un fond de cotyle (1) destiné à tre positionné dans le fond de la cavité CLAIMS -1-Prosthetic assembly for the acetabular joint comprising: -a cup base (1) intended to be positioned in the bottom of the cavity cotyloïdienne ; -un anneau métallique (2) destiné à tre fixé en combinaison avec le fond acetabulum; -a metal ring (2) intended to be fixed in combination with the bottom de cotyle (1) ; -un noyau (3) apte à tre monté, notamment avec capacité d'orientation cup (1); a core (3) capable of being mounted, in particular with orientation capacity angulaire, dans l'anneau (2), ledit noyau (3) recevant une tte fémorale angular, in the ring (2), said core (3) receiving a femoral head d'un implant correspondant, caractérisé en ce que le fond de cotyle (1) présente des agencements de fixation et de positionnement dans la cavité cotyloïdienne et des agencements de fixation et d'indexation angulaire de l'anneau métallique (2), le fond de cotyle (1) présentant une ouverture profilée (lj) pour permettre, après son positionnement dans la cavité cotyloïdienne et avant fixation de l'anneau, la mise en place de greffons osseux. a corresponding implant, characterized in that the cup bottom (1) has fixing and positioning arrangements in the acetabular cavity and fixing and angular indexing arrangements of the metal ring (2), the bottom cup (1) having a profiled opening (lj) to allow, after positioning in the acetabular cavity and before fixing the ring, the establishment of bone grafts. -2-Ensemble prothétique selon la revendication 1, caractérisé en ce que l'anneau (2) présente, au niveau de sa zone (2f) en communication avec l'ouverture (lj) du fond de cotyle (1), un revtement (7), notamment du type alumine.-2- prosthetic assembly according to claim 1, characterized in that the ring (2) has, at its zone (2f) in communication with the opening (lj) of the cup bottom (1), a coating ( 7), in particular of the alumina type. -3-Ensemble prothétique selon la revendication 1, caractérisé en ce que les agencements de fixation et d'indexation angulaire de l'anneau métallique (2), sont constitués par une patte équerrée (lb) présentant un rail de guidage (lbl) aptc à coopercr avec une patte ('2b) formée en débordement radial du bord circulaire de l'anneau, lesdites pattes (lb et 2b) étant percées pour l'engagement d'une vis de fixation coopérant avec le toit de la cavité cotyloïdienne.-3- Prosthetic assembly according to claim 1, characterized in that the fixing and angular indexing arrangements of the metal ring (2), are constituted by a squared tab (lb) having a guide rail (lbl) aptc to cooperate with a tab ('2b) formed in radial overflow from the circular edge of the ring, said tabs (lb and 2b) being pierced for the engagement of a fixing screw cooperating with the roof of the acetabular cavity. -4-Ensemble prothétique selon la revendication 3, caractérisé en ce que le fond de cotyle (1) et l'anneau (2) présentent symétriquement et en correspondance, des trous (lc-2c), (ld-le) et (2d-2e) pour l'engagement de vis (6) destinées à coopérer avec l'ischion et le pubis en étant orientées d'une manière divergente.-4- Prosthetic assembly according to claim 3, characterized in that the cup bottom (1) and the ring (2) have symmetrically and in correspondence, holes (lc-2c), (ld-le) and (2d -2e) for the engagement of screws (6) intended to cooperate with the ischium and the pubis while being oriented in a divergent manner. -5-Ensemble prothétique selon les revendications 3 et 4, caractérisé en ce que les vis (6) présentent une portée cylindrique filetée (6a) vissée dans un taraudage des trous de l'anneau (2c-2d-2e) et du fond de cotyle (1 c-1 d- le), ladite portée filetée (6) étant prolongée par une portée tronconique apte (6b) à coopérer avec la cavité cotyloïdienne.-5- Prosthetic assembly according to claims 3 and 4, characterized in that the screws (6) have a cylindrical threaded surface (6a) screwed into a thread of the holes of the ring (2c-2d-2e) and of the bottom of acetabulum (1 c-1 d- le), said threaded bearing surface (6) being extended by a frustoconical bearing surface capable (6b) of cooperating with the acetabular cavity. -6-Ensemble prothétique selon la revendication 1, caractérisé en ce que les agencements de fixation et de positionnement du fond de cotyle (1), sont constitués, d'une part, par deux pattes radiales (If-1g) disposées angulairement et symétriquement, de part et d'autre de la patte de fixation de l'anneau et, d'autre part, par une patte (lh) faisant office de crochet disposée en regard desdites pattes et selon leur axe de symétrie, des vis étant engagées au travers de trous (li) que présentent les différentes pattes. -6- Prosthetic assembly according to claim 1, characterized in that the arrangements for fixing and positioning the cup bottom (1), consist, on the one hand, by two radial lugs (If-1g) arranged angularly and symmetrically , on either side of the ring fixing lug and, on the other hand, by a lug (lh) acting as a hook arranged opposite said lugs and along their axis of symmetry, screws being engaged at through holes (li) presented by the different legs.
FR9814236A 1998-11-09 1998-11-09 Hip joint prosthesis has socket cup and metallic ring with angularly adjustable liner insert Pending FR2785522A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9814236A FR2785522A1 (en) 1998-11-09 1998-11-09 Hip joint prosthesis has socket cup and metallic ring with angularly adjustable liner insert

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9814236A FR2785522A1 (en) 1998-11-09 1998-11-09 Hip joint prosthesis has socket cup and metallic ring with angularly adjustable liner insert

Publications (1)

Publication Number Publication Date
FR2785522A1 true FR2785522A1 (en) 2000-05-12

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FR (1) FR2785522A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005060876A1 (en) * 2003-12-12 2005-07-07 Mariasal Investment N.V. Acetabular cup for a hip prosthesis with stem fixed by connection means
FR2879916A1 (en) * 2004-12-29 2006-06-30 Patrice Gestraud Hip prosthesis for human being, has spacer to integrate eyelet with acetabulum, and fixation screw cooperating with eyelet`s opening and having stem, threading for step and another threading formed between shoulder head and determined point
EP1810643A2 (en) * 2005-12-21 2007-07-25 DePuy Products, Inc. Acetabular cup with rigid fasteners
US8123816B2 (en) * 2007-06-06 2012-02-28 Howmedica Osteonics Corp. Acetabular shell
WO2023217791A1 (en) * 2022-05-10 2023-11-16 Depuy Ireland Unlimited Company Acetabular prosthesis with adjustable acetabular cup cages

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4795469A (en) * 1986-07-23 1989-01-03 Indong Oh Threaded acetabular cup and method
FR2633823A1 (en) * 1988-07-07 1990-01-12 Osteal Medical Laboratoires Bone cotyle support ring for hip prosthesis
FR2634372A1 (en) * 1988-07-20 1990-01-26 Balay Bruno Acetabular reconstruction module
EP0532439A2 (en) * 1991-09-13 1993-03-17 Impact Acetabular cup for hip prosthesis
EP0551794A1 (en) * 1992-01-16 1993-07-21 SULZER Medizinaltechnik AG Two-part acetabular cup
EP0591594A1 (en) * 1992-10-07 1994-04-13 Oscobal Ag Acetabular cup supporting ring
FR2710836A1 (en) * 1993-10-06 1995-04-14 Rambert Andre Acetabular element of a total hip prosthesis which can be implanted without cement
FR2718014A1 (en) * 1994-04-05 1995-10-06 Chagneau Francis Anchor screw assembly for joint prosthesis cup implant
US5702477A (en) * 1996-05-09 1997-12-30 Osteonics Corp. Acetabular shell with supplemental support and method
DE29804880U1 (en) * 1998-03-18 1998-05-20 Aesculap AG & Co. KG, 78532 Tuttlingen Hip prosthesis

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4795469A (en) * 1986-07-23 1989-01-03 Indong Oh Threaded acetabular cup and method
FR2633823A1 (en) * 1988-07-07 1990-01-12 Osteal Medical Laboratoires Bone cotyle support ring for hip prosthesis
FR2634372A1 (en) * 1988-07-20 1990-01-26 Balay Bruno Acetabular reconstruction module
EP0532439A2 (en) * 1991-09-13 1993-03-17 Impact Acetabular cup for hip prosthesis
EP0551794A1 (en) * 1992-01-16 1993-07-21 SULZER Medizinaltechnik AG Two-part acetabular cup
EP0591594A1 (en) * 1992-10-07 1994-04-13 Oscobal Ag Acetabular cup supporting ring
FR2710836A1 (en) * 1993-10-06 1995-04-14 Rambert Andre Acetabular element of a total hip prosthesis which can be implanted without cement
FR2718014A1 (en) * 1994-04-05 1995-10-06 Chagneau Francis Anchor screw assembly for joint prosthesis cup implant
US5702477A (en) * 1996-05-09 1997-12-30 Osteonics Corp. Acetabular shell with supplemental support and method
DE29804880U1 (en) * 1998-03-18 1998-05-20 Aesculap AG & Co. KG, 78532 Tuttlingen Hip prosthesis

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005060876A1 (en) * 2003-12-12 2005-07-07 Mariasal Investment N.V. Acetabular cup for a hip prosthesis with stem fixed by connection means
FR2879916A1 (en) * 2004-12-29 2006-06-30 Patrice Gestraud Hip prosthesis for human being, has spacer to integrate eyelet with acetabulum, and fixation screw cooperating with eyelet`s opening and having stem, threading for step and another threading formed between shoulder head and determined point
EP1810643A2 (en) * 2005-12-21 2007-07-25 DePuy Products, Inc. Acetabular cup with rigid fasteners
EP1810643A3 (en) * 2005-12-21 2008-10-08 DePuy Products, Inc. Acetabular cup with rigid fasteners
US8123816B2 (en) * 2007-06-06 2012-02-28 Howmedica Osteonics Corp. Acetabular shell
WO2023217791A1 (en) * 2022-05-10 2023-11-16 Depuy Ireland Unlimited Company Acetabular prosthesis with adjustable acetabular cup cages
US12042390B2 (en) 2022-05-10 2024-07-23 Depuy Ireland Unlimited Company Acetabular prosthesis with adjustable acetabular cup cages

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