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FR2687305A1 - Acetabular implant - Google Patents

Acetabular implant Download PDF

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Publication number
FR2687305A1
FR2687305A1 FR9201950A FR9201950A FR2687305A1 FR 2687305 A1 FR2687305 A1 FR 2687305A1 FR 9201950 A FR9201950 A FR 9201950A FR 9201950 A FR9201950 A FR 9201950A FR 2687305 A1 FR2687305 A1 FR 2687305A1
Authority
FR
France
Prior art keywords
ring
fins
implant
implant according
hydroxyapatite
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
FR9201950A
Other languages
French (fr)
Inventor
Dosdat Jean-Claude
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.)
PROLIG SA
Original Assignee
PROLIG SA
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 PROLIG SA filed Critical PROLIG SA
Priority to FR9201950A priority Critical patent/FR2687305A1/en
Publication of FR2687305A1 publication Critical patent/FR2687305A1/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/28—Materials for coating prostheses
    • A61L27/30—Inorganic materials
    • A61L27/32—Phosphorus-containing materials, e.g. apatite
    • 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
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A61F2/367—Proximal or metaphyseal parts of shafts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/02—Inorganic materials
    • A61L27/04—Metals or alloys
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/14—Macromolecular materials
    • A61L27/16—Macromolecular materials obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
    • A61F2002/30322—The prosthesis having different structural features at different locations within the same prosthesis differing in surface structures
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30772—Apertures or holes, e.g. of circular cross section
    • A61F2002/30784—Plurality of holes
    • A61F2002/30787—Plurality of holes inclined obliquely with respect to each other
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • A61F2002/3401—Acetabular cups with radial apertures, e.g. radial bores 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
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • A61F2002/3412—Acetabular cups with pins or protrusions, e.g. non-sharp pins or protrusions projecting from a shell surface
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • A61F2002/3412—Acetabular cups with pins or protrusions, e.g. non-sharp pins or protrusions projecting from a shell surface
    • A61F2002/3417—Acetabular cups with pins or protrusions, e.g. non-sharp pins or protrusions projecting from a shell surface the outer shell having protrusions on meridian lines, e.g. equidistant fins or wings around the equatorial zone
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • A61F2002/348—Additional features
    • A61F2002/3482—Two hemispherical halves having completely different structures
    • 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
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special 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
    • A61F2250/0026—Special 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00389—The prosthesis being coated or covered with a particular material
    • A61F2310/00592—Coating or prosthesis-covering structure made of ceramics or of ceramic-like compounds
    • A61F2310/00796—Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2430/00—Materials or treatment for tissue regeneration
    • A61L2430/24—Materials or treatment for tissue regeneration for joint reconstruction

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Veterinary Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Epidemiology (AREA)
  • Medicinal Chemistry (AREA)
  • Dermatology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Prostheses (AREA)

Abstract

The acetabular implant comprises a polyethylene core impacted in a hemispherical metal ring (2). The ring has primary stabilisation fins (2a) (2b) capable of interacting with the posterosuperior part of the acetabulum.

Description

Implant cotvloïdien.  Cotvloïdien implant.

L'invention concerne plus particulièrement un implant cotyloïdien de prothèse totale de hanche, à implanter sans ciment. The invention relates more particularly to a cotyloid implant of total hip prosthesis, to be implanted without cement.

D'une manière connue, I'implant comprend un noyau
métallique de forme hémisphérique dans lequel est impacté un noyau en polyéthylène.In a known manner, the implant comprises a core
metallic hemispherical shape in which a polyethylene core is impacted.

On connaît de nombreux types d'implants cotyloïdiens dont les noyaux notamment, sont conformés pour être impactés dans la cavité cotyloïde de l'os illiaque, en y étant maintenus sans ciment. Many types of acetabular implants are known, the nuclei of which in particular are shaped to be impacted in the acetabular cavity of the iliac bone, while being held there without cement.

Le problème que se propose de résoudre l'invention est d'obtenir une fixation mécanique primaire immédiate et totale, pour assurer le relais vers une fixation biologique, afin de garantir une stabilité définitive. The problem which the invention proposes to solve is to obtain an immediate and total primary mechanical fixation, to ensure the relay to a biological fixation, in order to guarantee final stability.

Un autre problème que se propose de résoudre l'invention est d'obtenir un contact très intime avec l'os porteur, avec un minimum de résection osseuse. Another problem which the invention proposes to solve is to obtain very intimate contact with the carrier bone, with a minimum of bone resection.

Selon l'invention, pour résoudre ces différents problèmes,
L'anneau présente des ailettes de stabilisation primaire apte à coopérer avec la partie postéro-supérieure de la cavité cotyloïde.According to the invention, to solve these different problems,
The ring has primary stabilization fins capable of cooperating with the postero-upper part of the acetabulum.

Pour résoudre le problème posé des contraintes exercées au niveau de l'implant, les ailettes sont formées verticalement à partir du bord supérieur de l'anneau, pour être situées dans l'axe des lignes de force canalisant les contraintes, de façon physiologique. La cavité cotyloïde de l'os illiaque est préparée en conséquence. Notamment l'emplacement des ailettes est choisie dans la partie postéro-supérieure de ladite cavité, c'està-dire à l'endroit où l'os est le plus épais et le plus dense. To resolve the problem posed of the stresses exerted on the implant, the fins are formed vertically from the upper edge of the ring, to be located in the axis of the lines of force channeling the stresses, physiologically. The acetabular cavity of the iliac bone is prepared accordingly. In particular, the location of the fins is chosen in the postero-upper part of said cavity, that is to say at the place where the bone is thickest and densest.

Pour résoudre le problème posé d'obtenir une très bonne stabilité primaire, les ailettes ont un profil transversal taillé en biseau. To solve the problem of obtaining very good primary stability, the fins have a beveled transverse profile.

Avantageusement, compte-tenu du problème posé à résoudre, L'anneau présente deux ailettes décalées chacune d'un angle de sensiblement 11" par rapport au centre de l'anneau. Advantageously, taking into account the problem posed to be solved, the ring has two fins each offset by an angle of approximately 11 "relative to the center of the ring.

La hauteur des ailettes est fonction de la taille des anneaux. The height of the fins depends on the size of the rings.

Toujours en ayant pour objectif d'obtenir une fixation sûre et efficace, l'anneau est recouvert d'une couche de plasma spray sous vide appliqué à basse température et de hydroxyapatite. Still with the objective of obtaining a secure and effective fixation, the ring is covered with a layer of plasma spray under vacuum applied at low temperature and of hydroxyapatite.

L'implant cotyloldien tel que défini reçoit un implant fémoral dont la partie proximale de la tige, considérée dans un plan frontal, est évasée et recouverte d'une couche de plasma spray et de hydroxyapatite. The acetabular implant as defined receives a femoral implant whose proximal part of the rod, considered in a frontal plane, is flared and covered with a layer of spray plasma and hydroxyapatite.

L'invention est exposée, ci-après plus en détail à l'aide des dessins annexés, dans lesquels:
La figure 1 est une vue en perspective de l'implant cotyloldien selon l'invention.The invention is set out below in more detail using the appended drawings, in which:
Figure 1 is a perspective view of the acetabular implant according to the invention.

La figure 2 est une vue en plan de l'implant. Figure 2 is a plan view of the implant.

La figure 3 est une vue en coupe longitudinale montrant l'impaction de l'implant dans la cavité cotyloïde de l'os illiaque.  Figure 3 is a longitudinal sectional view showing the impaction of the implant in the acetabular cavity of the iliac bone.

La figure 4 est une vue de face de la tige fémorale. Figure 4 is a front view of the femoral stem.

La figure 5 est une vue de côté correspondant à la figure 4. FIG. 5 is a side view corresponding to FIG. 4.

De manière connue, l'implant cotyloïdien comprend un noyau (1) en polyéthylène impacté dans un anneau métallique hémisphérique (2). In known manner, the acetabular implant comprises a core (1) made of impacted polyethylene in a hemispherical metal ring (2).

Selon l'invention, L'anneau (2) présente des ailettes de stabilisation primaire (2a) (2b) destinées à coopérer avec la partie postérosupérieure de la cavité cotyloïde (figure 3). Les ailettes (2a) et (2b) sont formées verticalement à partir du bord supérieur de l'anneau (2) pour être situéesO dans l'axe des lignes de force. According to the invention, the ring (2) has primary stabilization fins (2a) (2b) intended to cooperate with the posterosuperior part of the acetabular cavity (FIG. 3). The fins (2a) and (2b) are formed vertically from the upper edge of the ring (2) to be located in the axis of the lines of force.

Avantageusement, comme le montre la figure 2, L'anneau (2) présente deux ailettes décalées chacune d'un angle de sensiblement 110 par rapport au centre de l'anneau. Les ailettes (2a) et (2b) ont un profil transversal taillé en biseau. La périphérie externe de l'anneau (2) telle que définie présente une couche d'un revêtement de plasma spray sous vide, appliqué à basse température et de hydroxyapatite. Advantageously, as shown in Figure 2, the ring (2) has two fins each offset by an angle of substantially 110 relative to the center of the ring. The fins (2a) and (2b) have a transverse profile cut in a bevel. The outer periphery of the ring (2) as defined has a layer of a spray plasma coating under vacuum, applied at low temperature and hydroxyapatite.

D'une manière connue, L'anneau (2) peut présenter des logements (2c) pour le passage de vis de fixation. In a known manner, the ring (2) may have housings (2c) for the passage of fixing screws.

A titre indicatif, il existe huit-tailles d'implants cotyloïdiens, variant de 2 mm en 2 mm. As an indication, there are eight sizes of acetabular implants, varying from 2 mm to 2 mm.

L'impaction de l'implant cotyloïdien s'effectue d'une manière classique. Après avoir convenablement préparé la cavité cotyloïde, des repères permettent d'indiquer la place de logement des ailettes. Cet emplacement est choisi à la partie postéro-supérieure du cotyle, où l'os périphérique est le plus épais et le plus dense. Le logement des deux ailettes est établi de façon un peu divergente. The impact of the acetabular implant is carried out in a conventional manner. After having adequately prepared the acetabular cavity, marks are used to indicate the place of accommodation of the fins. This location is chosen at the postero-superior part of the acetabulum, where the peripheral bone is the thickest and most dense. The accommodation of the two fins is established in a slightly divergent manner.

L'impaction du noyau (1) dans l'anneau (2) s'effectue par tout moyen connu et approprié. De même, le noyau et l'anneau peuvent présenter tout type d'agencement aptes à assurer leur accouplement. The impact of the core (1) in the ring (2) is carried out by any known and appropriate means. Similarly, the core and the ring may have any type of arrangement capable of ensuring their coupling.

L'implant cotyloïdien tel que défini reçoit d'une manière connue, une tige fémorale (3) dont l'extrémité reçoit directement ou d'une manière rapportée, une tête sphérique destinée à coopérer avec le noyau (1) de Implant.  The acetabular implant as defined receives, in a known manner, a femoral stem (3) the end of which receives directly or in an attached manner, a spherical head intended to cooperate with the core (1) of the implant.

Comme le montrent les figures 4 et 5, la partie proximale (3a) de la tige (3) est évasée et recouverte de plasma spray et de hydroxyapatite. As shown in Figures 4 and 5, the proximal part (3a) of the rod (3) is flared and covered with spray plasma and hydroxyapatite.

De manière préférée, le col (3b) fait un angle d'environ 45" par rapport à la tige fémorale. A titre indicatif, L'implant fémoral présente six tailles de tige pour assurer une fixation initiale par pression et un remplissage optimum. Preferably, the neck (3b) makes an angle of about 45 "with respect to the femoral stem. As an indication, the femoral implant has six sizes of stem to ensure initial fixation by pressure and optimum filling.

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

Claims (7)

REVENDICATIONS -1- Implant cotyloïdien comprenant un noyau polyéthylène (1) impacté dans un anneau métallique hémisphérique (2), caractérisé en ce que l'anneau (2) présente des ailettes de stabilisation primaire (2a) (2b) aptes à coopérer avec la partie postéro-supérieure de la cavité cotyloïde.-1- Cotyloid implant comprising a polyethylene core (1) impacted in a hemispherical metal ring (2), characterized in that the ring (2) has primary stabilization fins (2a) (2b) able to cooperate with the part postero-superior of the acetabulum. -2- Implant selon la revendication 1, caractérisé en ce que les ailettes (2a) (2b) sont formées verticalement à partir du bord supérieur de l'anneau (2), pour être situées dans l'axe des lignes de force canalisant les contraintes, de façon physiologique.-2- Implant according to claim 1, characterized in that the fins (2a) (2b) are formed vertically from the upper edge of the ring (2), to be located in the axis of the lines of force channeling the constraints, physiologically. -3- Implant selon la revendication 2, caractérisé en ce que les ailettes (2a) (2b) ont un profil transversal taillé en biseau.-3- Implant according to claim 2, characterized in that the fins (2a) (2b) have a transverse profile bevelled. -4- Implant selon la revendication 1, caractérisé en ce qu'il présente deux ailettes (2a) (2b) décalées chacune d'un angle de sensiblement 110 par rapport au centre de l'anneau (2).-4- Implant according to claim 1, characterized in that it has two fins (2a) (2b) each offset by an angle of substantially 110 relative to the center of the ring (2). -5- Implant selon la revendication 1, caractérisé en ce que l'anneau (2) est recouvert d'une couche de plasma spray sous vide appliqué à basse température et de hydroxyapatite.-5- Implant according to claim 1, characterized in that the ring (2) is covered with a layer of spray plasma vacuum applied at low temperature and hydroxyapatite. -6- Implant selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la hauteur des ailettes (2a) (2b) est fonction de la taille des anneaux.-6- Implant according to any one of claims 1 to 5, characterized in that the height of the fins (2a) (2b) is a function of the size of the rings. -7- Implant selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'il reçoit un implant fémoral dont la partie proximale (3a) de la tige (3), considérée dans un plan frontal, est évasée et recouverte d'une couche de plasma spray et de hydroxyapatite. -7- Implant according to any one of claims 1 to 6, characterized in that it receives a femoral implant whose proximal part (3a) of the rod (3), considered in a frontal plane, is flared and covered with '' a layer of plasma spray and hydroxyapatite.
FR9201950A 1992-02-13 1992-02-13 Acetabular implant Pending FR2687305A1 (en)

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FR9201950A FR2687305A1 (en) 1992-02-13 1992-02-13 Acetabular implant

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FR9201950A FR2687305A1 (en) 1992-02-13 1992-02-13 Acetabular implant

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FR2687305A1 true FR2687305A1 (en) 1993-08-20

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2719465A1 (en) * 1994-05-04 1995-11-10 Medinov Sa Implant for cotyloid cavity
EP0753314A1 (en) * 1995-07-12 1997-01-15 bvba VANDERSTRAETEN E Process for the preparation of prostheses for skeletal reconstruction
FR2795626A1 (en) * 1999-07-02 2001-01-05 Taloco Invest N V HIP PROSTHESIS WITH FEMALE COMPONENT AND COTYLOIDAL ELEMENT, WITH LARGE FACILITY OF IMPLANTATION
FR2802819A1 (en) * 1999-12-23 2001-06-29 Hubert Hellak Cotyloid prosthesis made entirely from ceramic with calcium phosphate coating
CN111359014A (en) * 2018-12-25 2020-07-03 南京理工大学 Preparation method of polylactic acid-based ciprofloxacin/hydroxyapatite composite coating

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Publication number Priority date Publication date Assignee Title
US3781918A (en) * 1971-11-29 1974-01-01 R Mathys Artificial joint socket
US3840904A (en) * 1973-04-30 1974-10-15 R Tronzo Acetabular cup prosthesis
EP0137664A2 (en) * 1983-08-26 1985-04-17 Pfizer Hospital Products Group, Inc. Acetabular cup assembly prosthesis
FR2630322A1 (en) * 1988-04-22 1989-10-27 Leroy Paul Artificial cotyle for hip prostheses
FR2635968A1 (en) * 1988-09-06 1990-03-09 Calas Philippe Artificial finned cotyle fixed by hammer action
EP0373011A1 (en) * 1988-11-02 1990-06-13 S.A. Benoist Girard & Cie Femoral hip prosthesis
FR2641461A1 (en) * 1989-01-11 1990-07-13 Cremascoli Spa G Acetabulum prosthesis which may be used without cement
FR2650174A1 (en) * 1989-07-26 1991-02-01 Maudhuit Bernard Artificial acetabulum for hip prostheses and system for putting it into position

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3781918A (en) * 1971-11-29 1974-01-01 R Mathys Artificial joint socket
US3840904A (en) * 1973-04-30 1974-10-15 R Tronzo Acetabular cup prosthesis
EP0137664A2 (en) * 1983-08-26 1985-04-17 Pfizer Hospital Products Group, Inc. Acetabular cup assembly prosthesis
FR2630322A1 (en) * 1988-04-22 1989-10-27 Leroy Paul Artificial cotyle for hip prostheses
FR2635968A1 (en) * 1988-09-06 1990-03-09 Calas Philippe Artificial finned cotyle fixed by hammer action
EP0373011A1 (en) * 1988-11-02 1990-06-13 S.A. Benoist Girard & Cie Femoral hip prosthesis
FR2641461A1 (en) * 1989-01-11 1990-07-13 Cremascoli Spa G Acetabulum prosthesis which may be used without cement
FR2650174A1 (en) * 1989-07-26 1991-02-01 Maudhuit Bernard Artificial acetabulum for hip prostheses and system for putting it into position

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2719465A1 (en) * 1994-05-04 1995-11-10 Medinov Sa Implant for cotyloid cavity
EP0753314A1 (en) * 1995-07-12 1997-01-15 bvba VANDERSTRAETEN E Process for the preparation of prostheses for skeletal reconstruction
US5789017A (en) * 1995-07-12 1998-08-04 Coatinvest Process for the preparation of prostheses for skeletal reconstruction
FR2795626A1 (en) * 1999-07-02 2001-01-05 Taloco Invest N V HIP PROSTHESIS WITH FEMALE COMPONENT AND COTYLOIDAL ELEMENT, WITH LARGE FACILITY OF IMPLANTATION
GB2351671A (en) * 1999-07-02 2001-01-10 Bridgehall Consultants Ltd A hip prosthesis with femoral component and corresponding cotyloid element
GB2351671B (en) * 1999-07-02 2004-02-25 Bridgehall Consultants Ltd Hip prosthesis with femoral component and corresponding cotyloid element with high implantation adaptability
FR2802819A1 (en) * 1999-12-23 2001-06-29 Hubert Hellak Cotyloid prosthesis made entirely from ceramic with calcium phosphate coating
CN111359014A (en) * 2018-12-25 2020-07-03 南京理工大学 Preparation method of polylactic acid-based ciprofloxacin/hydroxyapatite composite coating

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