FR2548012A1 - Hip prosthesis and a corresponding set of equipment for its use - Google Patents

Hip prosthesis and a corresponding set of equipment for its use Download PDF

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Publication number
FR2548012A1
FR2548012A1 FR8310191A FR8310191A FR2548012A1 FR 2548012 A1 FR2548012 A1 FR 2548012A1 FR 8310191 A FR8310191 A FR 8310191A FR 8310191 A FR8310191 A FR 8310191A FR 2548012 A1 FR2548012 A1 FR 2548012A1
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France
Prior art keywords
cup
spherical
thread
bone
prosthesis according
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Granted
Application number
FR8310191A
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French (fr)
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FR2548012B1 (en
Inventor
Jean-Francois Larose
Roland Istria
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SAINT ETIENNE ECOLE NALE INGEN
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SAINT ETIENNE ECOLE NALE INGEN
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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
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2/4609—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of acetabular cups
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1662—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body
    • A61B17/1664—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body for the hip
    • A61B17/1666—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body for the hip for the acetabulum
    • 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
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/8875—Screwdrivers, spanners or wrenches
    • 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
    • A61F2002/30324—The prosthesis having different structural features at different locations within the same prosthesis differing in thickness
    • 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
    • A61F2002/3085—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external 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
    • A61F2/30767—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
    • A61F2002/3085—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
    • A61F2002/30858—Threads interrupted by grooves or sidewalls, e.g. flat sidewalls
    • 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
    • A61F2002/3085—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
    • A61F2002/30859—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface having threaded portions of different pitches
    • 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
    • A61F2002/3085—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
    • A61F2002/30873—Threadings machined on non-cylindrical external surfaces
    • 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
    • A61F2250/0036—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 thickness

Landscapes

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

Abstract

The invention relates to the technical sectors of the medical sciences, surgery, prostheses, and corresponding instruments. The prosthesis is distinguished by the fact that it has a general spherical outer shape 1a, followed by a cylindrical span 1b in its area of greater diameter, the cylindrical span and the spherical shape being threaded (single thread) so that the said cup is also distinguished by its spherical threading 1i, which provides for the advantages sought, with the maximum number of contact faces of the thread flanks in the osseous cavity, limiting the osseous resection to the greatest possible extent, and providing the greatest convenience in terms of its positioning. The invention applies to all types of hip prostheses comprising an acetabular cup cooperating with a femoral shaft.

Description

L'invention a pour objet une prothèse de hanche et un équpement correspondant pour sa mise en place. The subject of the invention is a hip prosthesis and corresponding equipment for its installation.

L'objet de l'invention se rattache aux secteurs techniques des sciences médicales, de la chirurgie, des prothèses, des instruments correspondants
D'une manière connue, les prothèses de hanches sont constituées principalement dsune part par une tige fémorale terminée par une rotule ou partie d'appui sphérique engagée et appuyée à friction dans une cupule cotyloïdienne présentant un logement correspondant, qui est fixée dans la cavité de la partie osseuse qui fait face à la tête de fémur.The subject of the invention relates to the technical sectors of medical sciences, surgery, prostheses, corresponding instruments
In a known manner, hip prostheses consist mainly of a femoral stem terminated on the one hand by a ball joint or spherical support part engaged and frictionally pressed in an acetabular cup having a corresponding housing, which is fixed in the cavity of the bony part that faces the femur head.

La prothèse de hanche selon l'invention a plus précisément pour objet la cupule cotyloidienne. C'est un élément important qui, pour assurer le succès de llimplantation de la prothèse et une bonne tenue dans le temps, doit présenter les qualités suivantes visées par l'objet de l'invention : - Il faut une fixation, un ancrage solide de la cupule dans la partie osseuse. The hip prosthesis according to the invention more specifically relates to the acetabular cup. It is an important element which, to ensure the success of the implantation of the prosthesis and a good resistance in time, must present the following qualities aimed by the object of the invention: - It is necessary a fixing, a solid anchoring of the cup in the bone part.

- La fixation doit être efficace dès la mise en place de la cupule ei ne doit pas se dégrader dans le temps.- The fixation must be effective as soon as the cup is put in place and must not deteriorate over time.

- La cupule doit être parfaitement et fermement positionnée dans la cavité osseuse, sans possibilité de se déplacer si peu que ce soit.- The cup must be perfectly and firmly positioned in the bone cavity, without the possibility of moving as little as possible.

- Il faut une bonne adaptation de la pièce prothétique à la cavité osseuse.- A good adaptation of the prosthetic part to the bone cavity is necessary.

- La cupule cotyloidienne doit correspondre autant qu'il se peut à la cavité du cotyle normal, de façon à limiter la résection osseuse nécessaire à llimplantation. - The acetabular cup should correspond as much as possible to the normal acetabular cavity, so as to limit the bone resection necessary for implantation.

- Le vissage est très nettement préférable à un scellement au moyen d'un ciment, pour assurer les qualités de fixation recherchées.- Screwing is very much preferable to sealing with cement, to ensure the desired fixing qualities.

La cupule ou élément prothétique de hanche suivant l'in- vention répond à ces conditions et qualités et présente les avantages correspondants. On a déjà proposé, selon des réalisations connue de cupules, de former un filetage plus ou moins profond sur la surfa ce extérieure qui est généralement cylindrique ou tronconique,
La prothèse de hanche suivant lwinvention est caractérisée en ce que la cupule cotyloidienne qui comporte un logement intérieur pour donner appui à la partie sphérique d'une tige fémorale, présente une forme extérieure d'allure générale sphérique suivie d'une portée cylindrique dans sa partie de plus grand diamètre, la portée cylindrique et la forme sphérique étant filetées (filet unique), de sorte que ladite cupule est aussi remarquable par son filetage sphérique qui assure les avantages recherchés, avec le maximum de faces de contact des flancs de filets dans la cavité osseuse, en limitant au minimum la résection osseuse et en donnant les meilleures commo- dités de mise en place.The cup or hip prosthetic element according to the invention meets these conditions and qualities and has the corresponding advantages. It has already been proposed, according to known embodiments of cups, to form a more or less deep thread on the outer surface which is generally cylindrical or frustoconical,
The hip prosthesis according to the invention is characterized in that the acetabular cup which has an internal housing to give support to the spherical part of a femoral stem, has an external shape of general spherical appearance followed by a cylindrical bearing in its part. larger diameter, the cylindrical seat and the spherical shape being threaded (single thread), so that said cup is also remarkable for its spherical thread which provides the desired benefits, with the maximum contact faces of the flanks of the threads in the bone cavity, minimizing bone resection and providing the best placement convenience.

Suivant une autre caractéristique, la prothèse est caractérisée par une réalisation en varïantede la cupule cotyloïdienne, selon laquelle la forme générale extérieure présnte, à la suite de la portee cylindrique une surface multiconique qui s'inscrit dans un profil sphérique fictif, ladite cupule étant aussi remarquable par le filetage multiconique que présente cette surface. According to another characteristic, the prosthesis is characterized by a variant embodiment of the acetabular cup, according to which the general external shape has, following the cylindrical bearing, a multiconic surface which fits into a fictitious spherical profile, said cup being also remarkable for the multiconic thread that this surface presents.

Suivant d'autres caractéristiques qui entrent dans le cadre de l'invention2 sont prévus des instruments pour préparer puis pour assurer la mise en place de la cupule cylindro-sphérique ou cylindro multiconique dans la cavité osseuse, ces instruments comprenant une fraise cylindro-sphérique ou cylindro-multiconique et un taraud correspondant destinés à préparer la cavité osseuse, et aussi une clé de montage avec cupule de centrage et ergots dentrainement pour la mise en place de la cupule
Ces caractéristiques et d'autres encore ressortiront de la description qui suit.According to other characteristics which come within the scope of the invention2, instruments are provided for preparing and then for ensuring the placement of the cylindro-spherical or cylindro-multiconic cup in the bone cavity, these instruments comprising a cylindro-spherical bur or cylindro-multiconic and a corresponding tap intended to prepare the bone cavity, and also an assembly key with centering cup and toothed lugs for the positioning of the cup
These characteristics and others will emerge from the description which follows.

Pour fixer l'objet de l'invention sans toutefois le limiter, dans les desins annexés
La figure 1 est une vue en coupe illustrant une cupule co tyloidienne selon l'invention de forme cylindro-sphérique vissée dans la cavité osseuse faisant face à la tête de fémur. To fix the subject of the invention without however limiting it, in the attached drawings
Figure 1 is a sectional view illustrating a co tyloid cup according to the invention of cylindrical-spherical shape screwed into the bone cavity facing the femur head.

La figure 2 est une vue illustrant,en vue extérieurer la cupule cotyloïdienne selon figure I vissée dans la cavité osseuse. Figure 2 is a view illustrating, in external view the acetabular cup according to Figure I screwed into the bone cavity.

On a représenté en traits fins l'os du bassin et la tête de fémur dans laquelle est implantée une tige fémorale.The pelvic bone and the femur head in which a femoral stem is implanted have been shown in thin lines.

La figure 3 est une vue en coupe illustrant une cupule co tyloïdienne selon l'invention de forme cylindro-multiconique vissée dans la cavité osseuse faisant face à la tête de fémur. Figure 3 is a sectional view illustrating a co tyloid cup according to the invention of cylindro-multiconic shape screwed into the bone cavity facing the head of the femur.

La figure 4 est une vue extérieure de la cupule selon la figure 3. FIG. 4 is an external view of the cup according to FIG. 3.

La figure 5 est une vue en plan de côté du logement de la partie sphérique de la tige fémorale. Figure 5 is a side plan view of the housing of the spherical portion of the femoral stem.

La figure 6 est une épure à grande échelle montrant la progression du taraud dans la cavité cotyloidienne.  Figure 6 is a large scale drawing showing the progress of the tap in the acetabulum.

Les figures 7 et 8 sont des vues respectivement de face et en plan, montrant une fraise cylindro-multiconique utilisée pour la préparation de la cavité osseuse recevant la cupule selon l'inven- tion. FIGS. 7 and 8 are respectively front and plan views, showing a cylindro-multiconic cutter used for the preparation of the bone cavity receiving the cup according to the invention.

Les figures 9 et 10 sont des vues respectivement de face et en plan, montrant un taraud cylindro-multiconique utilisé pour la préparation de la cavité osseuse recevant la cupule selon l'invention. Figures 9 and 10 are respectively front and plan views, showing a cylindro-multiconic tap used for the preparation of the bone cavity receiving the cup according to the invention.

Les figure 11 et 12 sont des vues respectivement de face et en plan, montrant la clé de montage de la cupuleselonl'invention. FIGS. 11 and 12 are respectively front and plan views, showing the key for mounting the cup according to the invention.

La figure 13 est une vue en coupe illustrant une cupule de centrage utilisée pour le montage de la cupule selon l'invention. Figure 13 is a sectional view illustrating a centering cup used for mounting the cup according to the invention.

La figure 14 est une vue à plus grande échelle, illustrant un des ergots adaptés sur la clé de montage pour le vissage de la cupule dans la cavité osseuse. Figure 14 is an enlarged view, illustrating one of the pins adapted on the mounting key for screwing the cup into the bone cavity.

La figure 15 est une vue en coupe partielle, montrant la clé de montage avec ses ergots et sa cupule de centrage assemblés, entre eux et avec une cupule selon l'invention. Figure 15 is a partial sectional view showing the mounting key with its lugs and its centering cup assembled together and with a cup according to the invention.

Afin de rendre plus concret l'objet de l'invention, on le décrit maintenant sous des formes non limitatives de réalisation illustrées aux figures des dessins. In order to make the object of the invention more concrete, it is now described in nonlimiting embodiments illustrated in the figures of the drawings.

La cupule cotyloïdienne (1) illustrée aux figures 1, 2 et 5 a une forme générale extérieure cylindro-sphérique, c'est-à-dire avec une partie sphérique (la) suivie dans sa partie de plus grand diamètre d'une portée cylindrique (lb). Sur la face (lc) en bout de la portée cylindrique sont percés des trous borgnes équidistants (ld sur une profondeur (p). A l'opposé de la face (lc), la partie sphéri que est tronquée pour former une face (le) parallèle à la face (lc), constituant l'entrée du filetage extérieur. The acetabular cup (1) illustrated in Figures 1, 2 and 5 has a generally cylindrical-spherical outer shape, that is to say with a spherical part (la) followed in its part of larger diameter by a cylindrical bearing (lb). On the face (lc) at the end of the cylindrical bearing surface are drilled equidistant blind holes (ld on a depth (p). Opposite the face (lc), the spherical part which is truncated to form a face (the ) parallel to the face (lc), constituting the entry of the external thread.

A partir de la face (lc) et axialement est formé un alésage cylindrique (lof) avec chanfrein d'entrée (lg). Cette partie est destinée à recevoir une pièce intermédiaire fixe ou mobile en matériau auto-lubrifiant (2a), dans laquelle vient s'articuler la partie sphe rique de la tige fémorale dont la queue profilée (2b) est destinée à être implantée de manière connue dans un fémur (F), comme illustre à la figure 2. From the face (lc) and axially is formed a cylindrical bore (lof) with inlet chamfer (lg). This part is intended to receive a fixed or mobile intermediate piece of self-lubricating material (2a), in which the spherical part of the femoral stem is articulated, the profiled tail (2b) of which is intended to be implanted in known manner. in a femur (F), as shown in Figure 2.

A A la suite de l'alésage cylindrique (lof), on forme une cavite demi-sphérique (lh) pour loger la pièce intermédiaire (2a) qui est ainsi parfaitemens guidée dans la cupule suivant son diamètre maxime avec les possibil és de débattements nécessaires par l'alésage cylindrique (lof).  AA following the cylindrical bore (lof), a semi-spherical cavity (lh) is formed to house the intermediate part (2a) which is thus perfectly guided in the cup according to its maximum diameter with the possibilities of deflections required by the cylindrical bore (lof).

La cupule (1) présente à la fois sur la partie sphérique (la et sur la portée cylindrique (lb) un filetage (li) du type ISO traditionnel, d'angle au sommet 60 et dont le pas (P), mesuré sur les projections des crêtes des filets sur l'axe de rotation de la cupule ou un axe qui lui est parallèle; est constant (figure 6). I1 s'ensuit que le pas (P1, P2, P3...) mesure sur les projections des fonds de filets sur l'axe de rotation de la cupule, n'est pas constant, mais augmente lorsque les filets se rapprochent de cet axe. The cup (1) has both on the spherical part (la and on the cylindrical surface (lb) a thread (li) of the traditional ISO type, with an angle at the top 60 and whose pitch (P), measured on the projections of the crest of the threads on the axis of rotation of the cup or an axis which is parallel to it; is constant (FIG. 6). It follows that the pitch (P1, P2, P3 ...) measures on the projections bottom of threads on the axis of rotation of the cup, is not constant, but increases when the threads approach this axis.

Cela définit un filetage cylindro-sphérique ou cylindro-biconique à pas non constant en fond de filet
Le filetage est réalisé par tous moyens tels que machine à commande numérique. Pour cela, on programme un pas non constant en fond de filet (variable à chaque tour, voir figure 6), ce pas étant calculé de manière à obtenir un pas constant en crête de filet. Ceci est particulièrement important car, si inversement, nous avions un pas constant en fond de filet, il en découlerait un pas non constant en crête de filet ce qui entraînerait lors du taraudage une répartition non équilibrée de la matière enlevée sur chaque flanc de filet et créerait ainsi des contraintes longitudinales.This defines a cylindro-spherical or cylindro-biconical thread with non-constant pitch at the bottom of the thread
The threading is carried out by any means such as a numerically controlled machine. For this, we program a non-constant step at the bottom of the thread (variable at each turn, see Figure 6), this step being calculated so as to obtain a constant step at the crest of the thread. This is particularly important because, if conversely, we had a constant pitch at the bottom of the thread, it would result in a non-constant pitch at the crest of the thread which would cause during tapping an unbalanced distribution of the material removed on each side of the thread and would thus create longitudinal constraints.

On voit encore que la cupule présente dans sa partie sphérique (la) des rainures (lj) inclinées suivant un angle (a) par rapport à l'axe de rotation de la cupule, dans le sens de la courbure de la partie sphérique permettant ainsi une "repousse" osseuse améliorant l'ancrage à long terme, et assurant l'élimination des débris. We also see that the cup has in its spherical part (la) grooves (lj) inclined at an angle (a) relative to the axis of rotation of the cup, in the direction of the curvature of the spherical part thus allowing bone "regrowth" improving long-term anchoring, and ensuring the removal of debris.

Selon la réalisation illustrée aux figures 3 et 4, la cupule (3) selon l'invention est identique à la cupule (1), sauf en ce qui concerne sa forme extérieure qui est cylindro-multiconique, c'est-à- dire avec une portée cylindrique (3a) suivie de plusieurs portées (3b - 3c - 3d...) de conicités progressives, pour que l'ensemble des portées coniques s'incrive dans un profil sphérique fictif (3e) comme illustré aux figures 3 et 4, avec un filetage (3f) de même type que le filetage (li). According to the embodiment illustrated in Figures 3 and 4, the cup (3) according to the invention is identical to the cup (1), except with regard to its external shape which is cylindro-multiconic, that is to say with a cylindrical bearing surface (3a) followed by several bearing surfaces (3b - 3c - 3d ...) of progressive taper, so that all of the conical bearing surfaces are inscribed in a fictitious spherical profile (3e) as illustrated in FIGS. 3 and 4 , with a thread (3f) of the same type as the thread (li).

Bien entendu, pour implanter correctement et efficacement la cupule (1) ou (3) selon l'invention dans le cotyle osseux, il est nécessaire de prévoir une instrumentation ancillaire appropriée représentée aux figures 7 à 15 des dessins. Of course, to correctly and effectively implant the cup (1) or (3) according to the invention in the acetabulum, it is necessary to provide an appropriate ancillary instrumentation shown in Figures 7 to 15 of the drawings.

Aux figures 7 et 8,- on voit une fraise (4) dont la forme du taillant est calculée pour réaliser une préparation optimum de la cavité osseuse (C). In Figures 7 and 8, - we see a cutter (4) whose shape of the cutting edge is calculated to achieve optimum preparation of the bone cavity (C).

Aux figures 9 et 10, on a illustré un taraud (5) de génération du taraudage cylindro-sphérique ou cylindro-multiconique à effectuer dans la cavité osseuse pour recevoir la cupule. FIGS. 9 and 10 illustrate a tap (5) for generating the cylindro-spherical or cylindro-multiconic tapping to be carried out in the bone cavity to receive the cup.

Comme on le voit sur l'épure de la figure 6, la matière enlevée (hachures) est uniformément répartie sur les flancs de chaque filet. As can be seen in the diagram in FIG. 6, the material removed (hatching) is uniformly distributed over the sides of each fillet.

On comprend toute l'importance d'une bonne préparation de la cavité osseuse qui doit recevoir dans les meilleures conditions la cupule vissée. We understand the importance of a good preparation of the bone cavity which must receive the screwed cup in the best conditions.

Dans cet esprit, on a également prévu une instrumentation pour l'implantation commode et précise de la cupule. In this spirit, an instrumentation has also been provided for the convenient and precise implantation of the cup.

On voit à la figure 11 une clé de montage (6) comprenant successivement un manche de manoeuvre (6a), un plateau (6b) et une portée filetée (6c). Le plateau (6b) est percé de trous équidistants (6d) établis sur un diamètre correspondant à celui des trous (nid) de la cupule, et destinés à recevoir par emmanchement forcé des pions ou ergots (7) présentant à cet effet (comme illustré figure 14), une portée cylindrique (7a) située entre une portée conique (7b) de coopération avec les trous (ld) de la cupule, et un épaulement (7c) d'appui sur le plateau (6b). FIG. 11 shows an assembly key (6) successively comprising an operating handle (6a), a plate (6b) and a threaded seat (6c). The plate (6b) is pierced with equidistant holes (6d) established on a diameter corresponding to that of the holes (nest) of the cup, and intended to receive by forced fitting pins or lugs (7) having for this purpose (as illustrated Figure 14), a cylindrical surface (7a) located between a conical surface (7b) of cooperation with the holes (ld) of the cup, and a shoulder (7c) bearing on the plate (6b).

Une cupule de centrage (8) de forme demi-sphérique correspondant à la cavité (lh) de la cupule selon l'invention, présente intérieurement un trou taraudé (8a) avec chambrage d'entrée (8b), pour être vissée et centrée sur la portée filetée (6c) de la clé de montage. A centering cup (8) of semi-spherical shape corresponding to the cavity (lh) of the cup according to the invention, internally has a tapped hole (8a) with inlet recess (8b), to be screwed and centered on the threaded seat (6c) of the mounting key.

Comme on le voit à la figure 15, sur l'ensemble formé par la clé de montage (6) avec ses ergots (7), et par la cupule de centrage (8), on positionne la cupule selon l'invention (1 ou 3) en introduisant les portées coniques (7b) des ergots dans les trous (nid) de la cupule jusqu'à ce qu'elle plaque contre le plateau (6b). On place ensuite la cupule à l'entrée du taraudage exécuté dans la ca vité osseuse, et on la visse délicatement et précisément à l'aide du manche de manoeuvre (6a) coopérant avec un organe approprié du genre clé, vilebrequin... As can be seen in FIG. 15, on the assembly formed by the mounting key (6) with its lugs (7), and by the centering cup (8), the cup according to the invention (1 or 3) by inserting the conical surfaces (7b) of the pins in the holes (nest) of the cup until it presses against the plate (6b). The cup is then placed at the entrance to the tapping executed in the bone cavity, and it is screwed gently and precisely using the operating handle (6a) cooperating with an appropriate organ of the key, crankshaft ... type.

Les avantages de l'équipement qui vient d'être décrit ressortent bien de la description, en particulier on souligne - La fixation solide et immédiatement efficace de la cupule coty loïdienne par le filetage cylindro-sphérique ou cylindro-multiconique dont les caractéristiques de construction (forme du filet, pas, profondeur, nombre de filets, faces de filets en contact...) autorisent une implantation ferme sans risque de déplacement, et ne se dégradant pas dans le temps.  The advantages of the equipment which has just been described emerge clearly from the description, in particular it is emphasized - The solid and immediately effective fixing of the coty loïd cup by the cylindro-spherical or cylindro-multiconic threading whose construction characteristics ( shape of the thread, pitch, depth, number of threads, faces of threads in contact, etc.) allow firm installation without risk of displacement, and not degrading over time.

- La résection minimum et naturelle de la cavité osseuse par le profil sphérique, pour un enfoncement maximum de la cupule.- The minimum and natural resection of the bone cavity by the spherical profile, for maximum depression of the cup.

- Le vissage progressif et régulier de la cupule dans la cavité osseuse préparée à cet effet, évitant les risques de désagrégation, d'arrachement, de détérioration.- The progressive and regular screwing of the cup into the bone cavity prepared for this purpose, avoiding the risks of disintegration, tearing, deterioration.

- L'adaptation parfaite de la cupule dans la cavité osseuse par 1' instrumentation ancillaire appropriée autorisant une préparation rationnelle et précise de la zône d'implantation ; la qualité de c ette préparation étant un facteur important pour la facilité et 1' efficacité de mise en place de la cupule.- The perfect adaptation of the cup in the bone cavity by appropriate ancillary instrumentation allowing rational and precise preparation of the implantation area; the quality of this preparation being an important factor for the ease and efficiency of placing the cup.

- La réalisation d'une forme extérieure de cupule se rapprochant au maximum de la forme sphérique de la cavité osseuse naturelle, ceci afin de respecter l'architecture fonctionnelle du bassin (lignes de force) et de limiter la résection osseuse nécessaire à l'implantation.- The realization of an external cup shape approaching as much as possible the spherical shape of the natural bone cavity, this in order to respect the functional architecture of the pelvis (lines of force) and to limit the bone resection necessary for implantation .

- Le pas constant au sommet des filets du filetage de la cupule permet la progression régulière du taraud dans la cavité osseuse, évitant ainsi la création de contraintes longitudinales (parallèles à l'axe de la prothèse) préjudiciables à la résistance des filets. - The constant pitch at the top of the threads of the cup thread allows the tap to progress evenly in the bone cavity, thus avoiding the creation of longitudinal stresses (parallel to the axis of the prosthesis) detrimental to the resistance of the threads.

La possibiltié de réaliser la cupule en tous matériaux tels que alliages coulés, usinés, céramiques, alumine, matériaux composites. The possibility of making the cup in all materials such as cast alloys, machined, ceramics, alumina, composite materials.

L'invention ne se limite aucunement à celui de ses modes d'application non plus qu'à ceux des modes de réalisation de ses diverses parties ayant plus spécialement été indiquées ; elle en embrasse au contraire toutes les variantes.  The invention is in no way limited to that of its modes of application any more than to those of the embodiments of its various parts which have been more particularly indicated; on the contrary, it embraces all its variants.

Claims (8)

REVENDICATIONS -1- Prothèse de hanche et équipement correspondant pour sa mise en place comprenant une cupule cotyloïdienne (1 ou 3) qui comporte un logement intérieur (lh) pour donner appui à une pièce intermédiaire fixe ou mobile (2a) dans laquelle s'articule une tige fémorale (2), caractérisée en ce qu'elle présente une forme extérieure générale sphérique (la), suivie d'une portée cylindrique (lb) dans sa partie de plus grand diamètre, la portée cylindrique et la forme sphérique étant filetées (filet unique), de sorte que ladite cupule est aussi remarquable par son filetage sphérique (li) qui assure les avantages recherchés, avec le maximum de faces de contact des flancs de filets dans 3a cavité osseuse, en limitant au maximum la résection osseuse, et en donnant les meilleures# commodités de mise en place.-1- Hip prosthesis and corresponding equipment for its installation comprising an acetabular cup (1 or 3) which includes an internal housing (lh) to support a fixed or mobile intermediate piece (2a) in which a femoral stem (2), characterized in that it has a generally spherical external shape (la), followed by a cylindrical bearing (lb) in its part of larger diameter, the cylindrical bearing and the spherical shape being threaded (thread unique), so that said cup is also remarkable for its spherical thread (li) which provides the desired benefits, with the maximum contact faces of the flanks of the threads in the bone cavity, by limiting bone resection as much as possible, and by giving the best # set-up conveniences. -2- Prothèse suivant la revendication 1, caractérisée par une réalisation en variante selon laquelle la cupule cotyloïdienne (3) présente à la suite de la portée cylindrique (3a), une surface multiconique (3b, 3c, 3d...) qui s'inscrit dans un profil sphérique fictif, ladite cupule étant aussi remarquable par le filetage multconique que présente cette surface.-2- Prosthesis according to claim 1, characterized by an alternative embodiment according to which the acetabular cup (3) has, following the cylindrical bearing (3a), a multiconic surface (3b, 3c, 3d ...) which s 'inscribed in a fictitious spherical profile, said cup being also remarkable for the multi-conical thread that this surface presents. -3- Prothèse suivant l'une quelconque des revendications 1 et 2, ca ractérisée en ce que le filetage (li) ou (3f-) de la cupule cotylo- dienne est du type ISO, d'angle au sommet 600 et dont le pas (P), me suré sur les projections des crêtes des filets sur l'axe de rotation de la cupule ou un axe qui lui est parallèle, est constant, ce qui définit un filetage cylindro-sphérique ou cylindro-biconique à pas non constant en fond de filet.-3- Prosthesis according to any one of claims 1 and 2, ca acterized in that the thread (li) or (3f-) of the acetabular cup is of the ISO type, with an angle at the top 600 and the pitch (P), measured on the projections of the crest of the threads on the axis of rotation of the cup or an axis which is parallel to it, is constant, which defines a cylindro-spherical or cylindro-biconical thread with non-constant pitch at the bottom of the net. -4- Prothèse suivant l'une quelconque des revendications 1 et 2, caractérisée en ce que la face (lc) de la cupule cotyloïdienne (1 ou 3) sur laquelle s'ouvre le logement intérieur (il), présente des trous borgnes équidistants (Id) destinés à l'entraînement en rotatic de la cupule en vue du vissage dans la cavité osseuse (C).-4- Prosthesis according to any one of claims 1 and 2, characterized in that the face (lc) of the acetabular cup (1 or 3) on which the interior housing (il) opens, has equidistant blind holes (Id) intended for the rotatic drive of the cup for screwing into the bone cavity (C). -5- Prothèse suivant lune quelconque des revendications 1 et 2, caractérisée en ce que la cupule cotyloïdienne (1 ou 3) présente sur sa périphérie filetée des rainures (lj) équidistantes et inclinées dans le sens de la courbure de la forme extérieure, destinées à à recevoir des débris d'os dûs à l'implantation de la cupule dans lç cotyle osseux (C) permettant ainsi une "repousse" osseuse amélioran l'ancrage à long terme. -5- Prosthesis according to any one of claims 1 and 2, characterized in that the acetabular cup (1 or 3) has on its threaded periphery grooves (lj) equidistant and inclined in the direction of the curvature of the outer shape, intended to receive bone debris due to the implantation of the cup in the acetabular bone (C) thus allowing bone "regrowth" improving long-term anchoring. -6- Prothèse suivant l'une quelconque des revendications 1 et 2, ca raçtérisée en ce que la cupule cotyloïdienne (1 ou 3) est mise en place dans la cavité osseuse (C) après préparation de cette cavité à l'aide d'une instrumentation ancillaire comprenant une fraise (4) cylindro-sphérique ou cylindro-multiconique et un taraud (5) correspondant, ainsi qu'une clé de montage (6) avec cupule de centrage (8) et ergots d'entraînement (7).-6- Prosthesis according to any one of claims 1 and 2, ca rectified in that the acetabular cup (1 or 3) is placed in the bone cavity (C) after preparation of this cavity using ancillary instrumentation comprising a cylindrical-spherical or cylindro-multiconic cutter (4) and a corresponding tap (5), as well as an assembly key (6) with centering cup (8) and drive pins (7). -7- Prothèse suivant la revendication 6, caractérisée en ce que la clé de montage (6) présente à une extrémité de son manche de manoeuvre (6a), un plateau (6b) percé de trous équidistants (6d) pour 1' -emmanchement à force des ergots d'entraînement (7), et une portée filetée (6c) pour le montage de la cupule de centrage (8) comprenant à cet effet un trou taraudé (8a) ouvrant sur un chambrage (8b) destiné au centrage de la cupule (8) sur 1 clé et6).  -7- Prosthesis according to claim 6, characterized in that the mounting key (6) has at one end of its operating handle (6a), a plate (6b) pierced with equidistant holes (6d) for 1 'fitting by force of the drive pins (7), and a threaded seat (6c) for mounting the centering cup (8) comprising for this purpose a tapped hole (8a) opening onto a recess (8b) intended for centering the cup (8) on 1 key and 6). -8- Prothèse suivant les revendications 7 et 8 ensemble, caractérisée en ce que les ergots d'entraînement (7) comprennent une portée cylindrique médiane (7a) d'emmanchement dans les trous (6d) du plateau de la clé de montage, une extrémité épaulée (7c) d'appui sur le plateau, et une extrémité Conique (7b) destinée à coopérer avec les trous équidistants (ld) de la cupule cotyloïdienne.  -8- Prosthesis according to claims 7 and 8 together, characterized in that the drive pins (7) comprise a central cylindrical surface (7a) for fitting in the holes (6d) of the plate of the mounting key, a shoulder end (7c) bearing on the plate, and a conical end (7b) intended to cooperate with the equidistant holes (ld) of the acetabular cup.
FR8310191A 1983-06-15 1983-06-15 HIP PROSTHESIS AND CORRESPONDING EQUIPMENT FOR ITS IMPLEMENTATION Expired FR2548012B1 (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2585946A1 (en) * 1985-08-12 1987-02-13 Epinette Jean Alain COTYLOIDAL HIP PROSTHESIS COMPONENT, TO BE IMPLANTED WITHOUT CEMENT
FR2590478A1 (en) * 1985-11-26 1987-05-29 Lahille Michel Artificial acetabulum
FR2591471A1 (en) * 1985-12-18 1987-06-19 Bernard Caignan Improvement to hip prostheses of the screwed acetabular ring type
US4715860A (en) * 1985-08-23 1987-12-29 The Regents Of The University Of California Porous acetabular hip resurfacing
EP0262379A1 (en) * 1986-09-23 1988-04-06 GebràœDer Sulzer Aktiengesellschaft Endoprosthesis for an acetabular cup
EP0291562A1 (en) * 1987-05-18 1988-11-23 GebràœDer Sulzer Aktiengesellschaft External shell for an artificial acetabular cup for the hip
FR2663840A1 (en) * 1990-06-29 1992-01-03 Medinov Sa PROSTHETIC ASSEMBLY INCLUDING IN PARTICULAR A CUP AND AN IMPACTOR APPARATUS.
EP0480551A1 (en) * 1990-10-09 1992-04-15 Johnson & Johnson Professional Products GmbH Screw-on acetabular prosthesis and method of manufacturing the same
US5358532A (en) * 1992-06-16 1994-10-25 Smith & Nephew Richards Inc. Cementless acetabular cup
WO1995018586A1 (en) * 1994-01-02 1995-07-13 Hoermansdoerfer Gerd Process for producing a thread with a variable profile and preferred application of the process
FR2784290A1 (en) * 1998-10-07 2000-04-14 Pierre Kehr Making prosthetic hip joint comprises forming meridian grooves into outer surface of e.g. ceramic cup, followed by clamping and keying radiation-cross-linked, hot, oxygen-saturated polyethylene molding to it
US8206454B2 (en) 2004-11-09 2012-06-26 Hoermansdoerfer Gerd Self-cutting screw-in element
US8864837B2 (en) 2004-11-09 2014-10-21 Gerd Hörmansdörfer Screw-in element having changing thread profile and method for its production

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DE2645101A1 (en) * 1976-10-04 1978-04-06 Staatliche Porzellan Manufaktu Hip prosthesis with cup-shaped ball socket - with self-tapping thread interrupted by upwards tapering free grooves
US4131116A (en) * 1977-05-02 1978-12-26 Pevrick Engineering Company, Inc. Rotary bone cutter for shaping sockets
FR2429358A1 (en) * 1978-06-20 1980-01-18 Tornier Sa Tool for use in bone surgery - has demountable ratchet hand lever on spanner which engages spindle-mounted pinion including forked head with hooked legs straddling ratchet
GB2069338A (en) * 1980-01-24 1981-08-26 Schuett & Grundei Med Tech Hip joint prosthesis

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2645101A1 (en) * 1976-10-04 1978-04-06 Staatliche Porzellan Manufaktu Hip prosthesis with cup-shaped ball socket - with self-tapping thread interrupted by upwards tapering free grooves
US4131116A (en) * 1977-05-02 1978-12-26 Pevrick Engineering Company, Inc. Rotary bone cutter for shaping sockets
FR2429358A1 (en) * 1978-06-20 1980-01-18 Tornier Sa Tool for use in bone surgery - has demountable ratchet hand lever on spanner which engages spindle-mounted pinion including forked head with hooked legs straddling ratchet
GB2069338A (en) * 1980-01-24 1981-08-26 Schuett & Grundei Med Tech Hip joint prosthesis

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2585946A1 (en) * 1985-08-12 1987-02-13 Epinette Jean Alain COTYLOIDAL HIP PROSTHESIS COMPONENT, TO BE IMPLANTED WITHOUT CEMENT
EP0214885A1 (en) * 1985-08-12 1987-03-18 Jean-Alain Epinette Acetabular cup for a hip joint to be implanted without cement
US4715860A (en) * 1985-08-23 1987-12-29 The Regents Of The University Of California Porous acetabular hip resurfacing
FR2590478A1 (en) * 1985-11-26 1987-05-29 Lahille Michel Artificial acetabulum
FR2591471A1 (en) * 1985-12-18 1987-06-19 Bernard Caignan Improvement to hip prostheses of the screwed acetabular ring type
EP0262379A1 (en) * 1986-09-23 1988-04-06 GebràœDer Sulzer Aktiengesellschaft Endoprosthesis for an acetabular cup
EP0291562A1 (en) * 1987-05-18 1988-11-23 GebràœDer Sulzer Aktiengesellschaft External shell for an artificial acetabular cup for the hip
EP0470912A2 (en) * 1990-06-29 1992-02-12 Medinov Sa Prosthetic assembly comprising a hip cup and an impact apparatus
FR2663840A1 (en) * 1990-06-29 1992-01-03 Medinov Sa PROSTHETIC ASSEMBLY INCLUDING IN PARTICULAR A CUP AND AN IMPACTOR APPARATUS.
EP0470912A3 (en) * 1990-06-29 1992-03-04 Medinov Sa Prosthetic assembly comprising a hip cup and an impact apparatus
EP0480551A1 (en) * 1990-10-09 1992-04-15 Johnson & Johnson Professional Products GmbH Screw-on acetabular prosthesis and method of manufacturing the same
US5358532A (en) * 1992-06-16 1994-10-25 Smith & Nephew Richards Inc. Cementless acetabular cup
WO1995018586A1 (en) * 1994-01-02 1995-07-13 Hoermansdoerfer Gerd Process for producing a thread with a variable profile and preferred application of the process
FR2784290A1 (en) * 1998-10-07 2000-04-14 Pierre Kehr Making prosthetic hip joint comprises forming meridian grooves into outer surface of e.g. ceramic cup, followed by clamping and keying radiation-cross-linked, hot, oxygen-saturated polyethylene molding to it
US8206454B2 (en) 2004-11-09 2012-06-26 Hoermansdoerfer Gerd Self-cutting screw-in element
US8864837B2 (en) 2004-11-09 2014-10-21 Gerd Hörmansdörfer Screw-in element having changing thread profile and method for its production

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