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FR2572277A1 - Artificial cotyle elastic ring for total reconstruction of the hip - Google Patents

Artificial cotyle elastic ring for total reconstruction of the hip Download PDF

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Publication number
FR2572277A1
FR2572277A1 FR8416371A FR8416371A FR2572277A1 FR 2572277 A1 FR2572277 A1 FR 2572277A1 FR 8416371 A FR8416371 A FR 8416371A FR 8416371 A FR8416371 A FR 8416371A FR 2572277 A1 FR2572277 A1 FR 2572277A1
Authority
FR
France
Prior art keywords
ring
elastic ring
hip
artificial
cotyle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR8416371A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR8416371A priority Critical patent/FR2572277A1/en
Publication of FR2572277A1 publication Critical patent/FR2572277A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—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
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30594—Special structural features of bone or joint prostheses not otherwise provided for slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots
    • 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
    • A61F2002/30861—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 threads of increasing or decreasing height
    • 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)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

The invention relates to a mechanical device allowing a screw-on ring elasticity. It consists of slits 1, 2, 3 of 1 mm width and 18 mm length disposed at 120 DEG with respect to the centre of the ring. The device according to the invention is in particular intended for screw-on rings used as cotyles in hip operations.

Description

L'utilisation d'anneaux vissés comme cotyles artificiels lors d'une reconstruction totale de la hanche se généralise de plus en plus. The use of screwed rings as artificial cups during a total reconstruction of the hip is becoming more and more widespread.

L'anneau qui se visse permet un ancrage parfait dans la cavité cotyloidienne sans avoir recours à un ciment de liaison os/implant. Durant les périodes d'activité l'ensemble des os d'unsquelette subissent des déformations proportionnelles aux efforts fournis; chaque activité focalisant une zône du squelette. C'est ici le cas du bassin qui, suivant l'effort accompli, marche par exemple, se déformera de plusieurs dizièmes de millimètres pour, finalement après cessation des efforts, retrouver sa géométrie initiale. The screwing ring allows perfect anchoring in the acetabular cavity without using a bone / implant bonding cement. During periods of activity, all the bones of a skeleton undergo deformations proportional to the efforts provided; each activity focusing on a skeleton area. This is the case here of the pelvis which, depending on the effort made, works for example, will deform by several tenths of a millimeter in order, finally after the efforts have ceased, to regain its initial geometry.

Visser un anneau, rigide de par sa conception, c'est dès le départ associer un ensemble élastique à un ensemble rigide, ce qui à'la longue provoque une mauvaise tenue de l'implant dans la cavité osseuse. Screwing a ring, rigid by design, is from the outset associating an elastic assembly with a rigid assembly, which in the long run causes poor holding of the implant in the bone cavity.

Par contre, l'utilisation d'un anneau vissé élastique absorbant les déformations du bassin durant la période d'effort et retrouvant sa géométrie initiale après cessation de ces efforts atténue les descellements dans le temps. On the other hand, the use of an elastic screwed ring absorbing the deformations of the pelvis during the effort period and regaining its initial geometry after cessation of these efforts attenuates loosening over time.

La présente invention illustrée par les figures I et 2 consiste donc en un anneau vissé élastique comprenant 3 fentes (I, 2, 3) de largeur Imm et de longueur I8mm, disposées à 1200 par rapport au centre de l'anneau (4). The present invention illustrated by Figures I and 2 therefore consists of an elastic screwed ring comprising 3 slots (I, 2, 3) of width Imm and length I8mm, arranged at 1200 relative to the center of the ring (4).

L'anneau dit élastique se place dans la cavité cotyloidienne comme tous les anneaux déjà existants, à l'aide n1 instruments ancillaires prévus à cet effet. La pièce de friction (5) en matière plastique venant s'insérer dans la cavité interne de l'anneau pourra alors remplir correctement son rôle, qui est dtassurer une friction minimum entre elle et la tête fémorale, sans subir les sollicitations dues aux déformations du bassin, celles-ci étant absorbées par l'anneau élastique. The so-called elastic ring is placed in the acetabular cavity like all already existing rings, using n1 ancillary instruments provided for this purpose. The plastic friction part (5) which is inserted into the internal cavity of the ring can then correctly fulfill its role, which is to ensure minimum friction between it and the femoral head, without being subjected to the stresses due to deformations of the pelvis, these being absorbed by the elastic ring.

En effet, le rôle des fentes (I,2, 3) situées sur la périphérie de l'anneau, est de permettre aux 3 segments de de se resserer suivant l'intensité de l'effort, puis lorsque l'effort redevient nul de retrouver la forme initiale grâce à l'élasticité du métal. Pendant cette phase de travail la pièce de friction n'a subi aucune contrainte localisée génératrice de dégradation prématurée du plastique; de plus les contraintes de l'interface os/métal ne sont plus différentes mais semblables. Indeed, the role of the slots (I, 2, 3) located on the periphery of the ring, is to allow the 3 segments to tighten according to the intensity of the effort, then when the effort becomes zero again recover the initial shape thanks to the elasticity of the metal. During this working phase, the friction part did not undergo any localized stress generating premature degradation of the plastic; moreover the constraints of the bone / metal interface are no longer different but similar.

Le nombre des fentes ainsi que leurs dimensions peuvent être modifiés.  The number of slots and their dimensions can be changed.

Claims (2)

REVENDICATIONS 1- Anneau élastique remplissant la fonction de cotyle artificiel, caractérisé par la présence de fentes en nombre et en dimensions variables, disposées à des endroits et selon des directions variables mais déterminées par le fait qu'elles permettent l'absortion des déformations du bassin du patient de taille et de poids quelconque. 1- Elastic ring fulfilling the function of artificial acetabulum, characterized by the presence of slots in number and in variable dimensions, arranged in places and in variable directions but determined by the fact that they allow the absorption of the deformations of the pelvis of the patient of any size and weight. 2- Anneau élastique selon la revendication l, caractérisé par une disposition géométrique des fentes (1,2,3) disposées sur la périphérie du dit anneau, ces fentes sont disposées à 1200 par rapport au centre de l'anneau (4).  2- elastic ring according to claim l, characterized by a geometric arrangement of the slots (1,2,3) arranged on the periphery of said ring, these slots are arranged at 1200 relative to the center of the ring (4).
FR8416371A 1984-10-26 1984-10-26 Artificial cotyle elastic ring for total reconstruction of the hip Withdrawn FR2572277A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8416371A FR2572277A1 (en) 1984-10-26 1984-10-26 Artificial cotyle elastic ring for total reconstruction of the hip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8416371A FR2572277A1 (en) 1984-10-26 1984-10-26 Artificial cotyle elastic ring for total reconstruction of the hip

Publications (1)

Publication Number Publication Date
FR2572277A1 true FR2572277A1 (en) 1986-05-02

Family

ID=9309012

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8416371A Withdrawn FR2572277A1 (en) 1984-10-26 1984-10-26 Artificial cotyle elastic ring for total reconstruction of the hip

Country Status (1)

Country Link
FR (1) FR2572277A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4894064A (en) * 1987-11-09 1990-01-16 W. Hermann Ag Endoprosthesis for a hip-joint socket

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0083708A1 (en) * 1982-01-08 1983-07-20 GebràœDer Sulzer Aktiengesellschaft Acetabular cup to be anchored in the pelvis without cement
EP0144588A2 (en) * 1983-12-12 1985-06-19 GebràœDer Sulzer Aktiengesellschaft Hip joint cup

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0083708A1 (en) * 1982-01-08 1983-07-20 GebràœDer Sulzer Aktiengesellschaft Acetabular cup to be anchored in the pelvis without cement
EP0144588A2 (en) * 1983-12-12 1985-06-19 GebràœDer Sulzer Aktiengesellschaft Hip joint cup

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4894064A (en) * 1987-11-09 1990-01-16 W. Hermann Ag Endoprosthesis for a hip-joint socket

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