FR2839442A1 - Knee prosthesis comprises tibial base with wall in which there is long reinforcement and intermediate plate with comprising wall with projecting rib tightly engaged in reinforcement - Google Patents

Knee prosthesis comprises tibial base with wall in which there is long reinforcement and intermediate plate with comprising wall with projecting rib tightly engaged in reinforcement Download PDF

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Publication number
FR2839442A1
FR2839442A1 FR0205803A FR0205803A FR2839442A1 FR 2839442 A1 FR2839442 A1 FR 2839442A1 FR 0205803 A FR0205803 A FR 0205803A FR 0205803 A FR0205803 A FR 0205803A FR 2839442 A1 FR2839442 A1 FR 2839442A1
Authority
FR
France
Prior art keywords
wall
base
recess
knee prosthesis
tibial
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Withdrawn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
FR0205803A
Other languages
French (fr)
Inventor
Vincent Bousquet
Jean Paul Ginefri
Ivan Perringerard
Francois Pilon
Fariborz Sabri
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.)
Dedienne Sante SAS
Original Assignee
Dedienne Sante SAS
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 Dedienne Sante SAS filed Critical Dedienne Sante SAS
Priority to FR0205803A priority Critical patent/FR2839442A1/en
Publication of FR2839442A1 publication Critical patent/FR2839442A1/en
Withdrawn legal-status Critical Current

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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
    • A61F2/38—Joints for elbows or knees
    • 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
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • 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
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30112—Rounded shapes, e.g. with rounded corners
    • 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
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30138—Convex polygonal shapes
    • A61F2002/30153—Convex polygonal shapes rectangular
    • 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
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30182—Other shapes
    • A61F2002/30187—D-shaped or half-disc-shaped
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30362—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit with possibility of relative movement between the protrusion and the recess
    • A61F2002/30364—Rotation about the common longitudinal axis
    • A61F2002/30367—Rotation about the common longitudinal axis with additional means for preventing said rotation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/305—Snap connection
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
    • 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
    • A61F2002/30785—Plurality of holes parallel
    • 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
    • A61F2002/3079—Stepped or enlarged apertures, e.g. having discrete diameter changes
    • 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
    • A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
    • A61F2002/30891—Plurality of protrusions
    • A61F2002/30892—Plurality of protrusions parallel
    • 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
    • A61F2/38—Joints for elbows or knees
    • A61F2002/3895—Joints for elbows or knees unicompartimental
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
    • 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
    • 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0017—Angular shapes
    • A61F2230/0019—Angular shapes rectangular
    • 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0028—Shapes in the form of latin or greek characters
    • A61F2230/0034—D-shaped

Abstract

The tibial base (3) comprises a wall (12) in which a long reinforcement (17) emerges in the anteroposterior direction from the articulation after implantation. An intermediate plate (4) comprises a wall (25) comprising a rib (26) projecting from its face which is tightly engaged in the reinforcement until this wall face in contact with the base wall face.

Description

mise en place/retrait.placement / removal.

La presente invention concerne une prothese de genou cite "unicompartimentaire", c'est-a-dire comprenant un element femoral prevu pour reproduire un seul des condyles femoraux et une embase tibiale prevue pour restaurer seulement la zone laterale correspondante du plateau tibial. Une prothese de ce type est bien connue, comprenant un element femoral et une embase tibiale tels que precites, ainsi qu'un plateau intermediaire en materiau favorisant le glissement, ce plateau intermediaire etant destine a etre monte sur l'embase tibiale et recevant ['element  The present invention relates to a knee prosthesis cited as "unicompartmental", that is to say comprising a femoral element intended to reproduce only one of the femoral condyles and a tibial base intended to restore only the corresponding lateral zone of the tibial plateau. A prosthesis of this type is well known, comprising a femoral element and a tibial base as mentioned above, as well as an intermediate plate of material promoting sliding, this intermediate plate being intended to be mounted on the tibial base and receiving [' element

femoral, dont il favorise le mouvenient par rapport a l'embase tibiale.  femoral, which it promotes movement over the tibial base.

Dans les protheses connues, le plateau intermediaire est frequemment monte sur ['element tibial par encliquetage. Pour ce faire, I'embase tibiale comprend un rebord peripherique muni de saillies internee d'encliquetage, et le plateau intermediaire comprend un evidement peripherique propre 3 recevoir ce rebord et des logements d'encliquetage  In known prostheses, the intermediate plate is frequently mounted on the tibial element by snap-fastening. To do this, the tibial base comprises a peripheral flange provided with internal snap projections, and the intermediate plate comprises a peripheral recess suitable for receiving this flange and snap-in housings.

propres a recevoir ces saillies.suitable for receiving these projections.

Cet evidement et ces logements, de meme qu'un ou plusieurs evidements amenages dans le bord interne du plateau intermediaire pour controler la position de ce dernier en rotation, ont pour inconvenients de fragiliser la structure de ce plateau et de generer des zones d'usure, voire  This recess and these housings, as well as one or more recesses provided in the internal edge of the intermediate plate for controlling the position of the latter in rotation, have the disadvantages of weakening the structure of this plate and generating areas of wear. , or even

de rupture, prejudiciables a la perennite de la prothese.  rupture, detrimental to the durability of the prosthesis.

La presente invention vise a remedier a cet inconvenient fondamental. La prothese qu'elle concerne comprend, de maniere connue en soi, un element femoral prevu pour reproduire un seul des condyles femoraux, une embase tibiale prevue pour restaurer seulement la zone laterale correspondante du plateau tibial, et un plateau intermediaire en materiau favorisant le glissement, destine a etre monte sur l'embase tibiale  The present invention aims to remedy this fundamental drawback. The prosthesis which it relates to comprises, in a manner known per se, a femoral element intended to reproduce only one of the femoral condyles, a tibial base provided to restore only the corresponding lateral zone of the tibial plateau, and an intermediate plateau in material favoring sliding. , intended to be mounted on the tibial base

et a recevoir ['element femoral.and to receive the femoral element.

Selon ['invention: - I'embase tibiale comprend une paroi dans laquelle debouche un renfoncement allonge, oriente dans le sens longitudinal de cette em base, c 'est-a-dire dans le sens antero-posterieur de [ ' articulation apres implantation; et - le plateau intermediaire comprend une paroi comportant une nervure faisant saillie d'une face de cette paroi, propre a etre engagee etroitement dans ledit renfoncement jusqu'3 ce que la face de ia paroi comportant la nervore se trouve au contact de la face de la paroi de  According to the invention: - the tibial base comprises a wall into which opens an elongate recess, oriented in the longitudinal direction of this em base, that is to say in the antero-posterior direction of ['articulation after implantation; and - the intermediate plate comprises a wall comprising a rib projecting from one face of this wall, suitable for being engaged closely in said recess until the face of the wall comprising the rib is in contact with the face of the wall of

l'embase dans laquelle debouche le renfoncement.  the base in which the recess opens.

L'embase tibiale selon ['invention est ainsi depourvue de rebord peripherique et de saillies d'encliquetage, et le plateau intermediaire est  The tibial base according to the invention is thus devoid of peripheral rim and snap projections, and the intermediate plate is

done depourvu d'evidement peripherique et de logements d'encliquetage.  therefore devoid of peripheral recess and latching housings.

La nervure qu'il comprend peut etre engagee etroitement dans ledit renfoncement, ce qui assure le parfait maintien du plateau intermediaire sur l'embase tibiale, tent en rotation qu'en translation, sans reduction de I'epaisseur de ce plateau ni creation de zones fragilisees susceptibles de subir une usure voire une rupture sous ltexercice des contraintes repetees  The rib which it comprises can be engaged closely in said recess, which ensures perfect maintenance of the intermediate plate on the tibial base, tent in rotation only in translation, without reduction of the thickness of this plate nor creation of zones weakened likely to undergo wear or even rupture under the exercise of repeated stresses

que la prothese subit.that the prosthesis undergoes.

De preference, le renfoncement est delimite par une paroi de fond et par une paroi peripherique raccordant cette paroi de fond au reste de l'embase, ladite paroi de fond comprenant au moins un trou amenage a  Preferably, the recess is delimited by a bottom wall and by a peripheral wall connecting this bottom wall to the rest of the base, said bottom wall comprising at least one hole

travers elle pour recevoir une vis d'ancrage de ltembase tibiale 3 I'os.  through it to receive an anchor screw of the tibial base 3 to the bone.

Cette paroi de fond peut comprendre deux trous distants l'un de l'autre afin d'assurer un parfait ancrage de l'embase tibiale et une parfaite immobilisation de celle-ci par rapport 3 I'os, tent en rotation quten  This bottom wall may include two holes spaced from one another in order to ensure perfect anchoring of the tibial base and perfect immobilization of the latter relative to the bone, tent in rotation quten

translation.translation.

L' em base tibiale et le pl ateau interm ediaire peuvent etre symetriques par rapport a un plan transversal median de cette embase et  The tibial base and the intermediate platter may be symmetrical with respect to a median transverse plane of this base and

de ce plateau.of this tray.

U ne meme em base tibiale et un meme plateau intermediaire peuvent alors etre utilises pour le traitement d'un condyle externe ou interne, en etant positionnes de maniere inverse dans un cas et dans l'autre. Avantageusement, ledit renfoncement, et done ladite nervure,  Even a tibial base and the same intermediate plate can then be used for the treatment of an external or internal condyle, by being positioned in a reverse manner in one case and in the other. Advantageously, said recess, and therefore said rib,

presente une forme oblongue, ctest-a-dire est arrondi a ses extremites.  has an oblong shape, that is to say is rounded at its ends.

Cette forme contribue 3 eliminer le risque d'usure du plateau  This shape contributes 3 to eliminate the risk of wear of the plate

intermediaire au niveau de cette nervure.  intermediate at this rib.

Des moyens d'encliquetage peuvent etre prevus sur la nervure et sur les parois delimitant ledit renfoncement, pour assurer la retention du  Latching means can be provided on the rib and on the walls delimiting said recess, to ensure the retention of the

plateau intermediaire sur l'embase tibiale.  intermediate plate on the tibial base.

Avantageusement, ledit trou amenage dans ladite paroi de fond pour recevoir une vis d'ancrage est delimite par une paroi en forme de portion de sphere creuse, et la vis destinee a 8tre engagee dans ce trou presente une tete ayant, du cote du corps filete de cette vis, une forme en portion de sphere de diametre legerement inferieur a celui de ladite paroi en  Advantageously, said hole provided in said bottom wall for receiving an anchoring screw is delimited by a wall in the form of a portion of hollow sphere, and the screw intended to be engaged in this hole has a head having, on the side of the threaded body of this screw, a portion shape of sphere of diameter slightly smaller than that of said wall in

forme de portion de sphere creuse.shape of portion of hollow sphere.

Cette paroi et cette forme permettent ainsi un debattement multidirectionnel de la vis, et done une orientation de cette vis par rapport a l t em base tibiale. Cette orientation permet de diriger la vis vers la zone osseuse apparaissent en la plus a meme d' assurer un bon ancrage de cette  This wall and this shape thus allow a multidirectional movement of the screw, and therefore an orientation of this screw relative to the tem tibial base. This orientation makes it possible to direct the screw towards the osseous zone appear in most able to ensure a good anchoring of this

vis a l'os.screw to the bone.

Pour sa bonne comprehension, I'invention est 3 nouveau decrite ci-dessous en reference au dessin schematique annexe representant, a titre d'exemple non limitatif, une forme de realisation preferee de la prothese de  For its good understanding, the invention is 3 new described below with reference to the accompanying diagrammatic drawing representing, by way of nonlimiting example, a preferred embodiment of the prosthesis of

genou qutelle concerne.knee it concerns.

Les figures 1 a 3 en vent des vues respectivement de cote, de face et de dessus; la figure 4 est une vue en perspective de ltembase tibiale et du plateau intermediaire qu'elle comprend; la figure 5 est une vue de dessus de 1'embase tibiale, et la figure 6 est une vue de cette embase tibiale en coupe selon la  Figures 1 to 3 in wind respectively side, front and top views; Figure 4 is a perspective view of the tibial base and the intermediate plate which it comprises; Figure 5 is a top view of the tibial base, and Figure 6 is a view of this tibial base in section along the

ligne VI-VI de la figure 5.line VI-VI of figure 5.

Les figures 1 a 3 representent une prothese de genou 1 cite "unicompartimentaire", c'est-b-dire comprenant un element femoral 2 prevu pour reproduire un seul des condyles femoraux, une embase tibiale 3 prevue pour restaurer seulement la zone laterale correspondante du plateau tibial, un plateau intermediaire 4 en materiau favorisant le glissement, et  Figures 1 to 3 show a knee prosthesis 1 cited "unicompartmental", that is to say comprising a femoral element 2 intended to reproduce only one of the femoral condyles, a tibial base 3 provided to restore only the corresponding lateral zone of the tibial plateau, an intermediate plateau 4 in material promoting sliding, and

deux vis 5.two screws 5.

L'element femoral 2 presente une partie recourbee 10 reproduisant un condyle femoral et deux plots d'ancrage 11 pour sa fixation au femur, apres resection adequate du condyle a traiter de ce  The femoral element 2 presents a curved part 10 reproducing a femoral condyle and two anchoring studs 11 for its attachment to the femur, after adequate resection of the condyle to be treated.

dernier.latest.

L'embase tibiale 3 comprend, comme le montrent plus particulierement les figures 4 a 6, une paroi plane 12 et une excroissance  The tibial base 3 comprises, as shown more particularly in FIGS. 4 to 6, a planar wall 12 and a projection

13 faisant saillie de 1'une des faces de cette paroi 12.  13 projecting from one of the faces of this wall 12.

La paroi 12 est destinee a venir reposer contre la face superieure du tibia, apres resection adequate de celui-ci, et a recevoir le  The wall 12 is intended to come to rest against the upper face of the tibia, after adequate resection thereof, and to receive the

plateau intermediaire 4.intermediate plate 4.

L'excroissance 13 comprend une paroi de fond 15 et une paroi peripherique 16 raccordant cette paroi de fond 15 3 la paroi 11, qui delimitent entre elles un renfoncement allonge 17, oriente dans le sens longitudinal de ltembase 3, c'est-3-dire dans le sens antero-posterieur de I'articulation apres implantation. Les portions de la paroi 16 delimitant les extremites du renfoncement 17 vent arrondies, de sorte que ce renfoncement 17  The protrusion 13 comprises a bottom wall 15 and a peripheral wall 16 connecting this bottom wall 15 3 the wall 11, which delimit between them an elongated recess 17, oriented in the longitudinal direction of the base 3, that is 3- say in the antero-posterior direction of the joint after implantation. The portions of the wall 16 delimiting the ends of the recess 17 are rounded, so that this recess 17

presente une forme oblongue.has an oblong shape.

La paroi de fond 15 comprend deux trous distants 20 amenages 3 travers elle pour recevoir les vis 5. Comme le montre la figure 6, la profondeur du renfoncement 17 est telle que les fetes de ces vis 5 n'occupent, apres implantation, qu'une portion marginale de la hauteur de  The bottom wall 15 comprises two distant holes 20 feeds 3 through it to receive the screws 5. As shown in FIG. 6, the depth of the recess 17 is such that the parties of these screws 5 only occupy, after implantation, a marginal portion of the height of

ce renfoncement 17.this recess 17.

Chaque trou 20 est delimite par une paroi 21 en forme de portion de sphere creuse, et chaque vis 5 presente une tete ayant, du cote du corps filete de cette vis, une forme en portion de sphere de diametre legerement inferieur 3 celui de la paroi 21. Ces parois 21 et ces fetes de vis permettent un debattement multidirectionnel des vis 5 par rapport 3 I'embase 3, et done une orientation de ces vis 5 par rapport 3 cette embase 3, comme le montre les figures 1 et 2, qui permet de diriger chaque vis 5 vers la zone osseuse apparaissent en la plus 3 meme  Each hole 20 is delimited by a wall 21 in the form of a portion of hollow sphere, and each screw 5 has a head having, on the side of the threaded body of this screw, a portion shape of sphere of diameter slightly less than that of the wall. 21. These walls 21 and these screw festivals allow a multidirectional movement of the screws 5 relative to the base 3, and therefore an orientation of these screws 5 relative to this base 3, as shown in FIGS. 1 and 2, which allows to direct each screw 5 to the bony area appear in the most 3 same

d'assurer un bon ancrage de cette vis 3 I'os.  ensure good anchoring of this 3 bone screw.

Le plateau intermediaire 4 est destine 3 etre monte sur l 'em base 3 et 3 recevoir ['element femoral 2, dont il favorise le mouvement par rapport 3 I'embase 3. II comprend une paroi plane 25, pouvant former une glene superieure de reception du condyle prothetique 10, et une nervure  The intermediate plate 4 is intended to be mounted on the em base 3 and 3 to receive the femoral element 2, of which it promotes movement relative to the base 3. It comprises a flat wall 25, which can form an upper glenoid reception of prosthetic condyle 10, and a rib

26 faisant saillie d'une face de cette paroi 25.  26 projecting from one face of this wall 25.

La nervure 26 a des dimensions legerement inferieures 3 celles du renfoncement 17, done une forme oblongue identique 3 celle du renfoncement 17, et une hauteur inferieure 3 la hauteur de ce  The rib 26 has dimensions slightly lower than those of the recess 17, therefore an oblong shape identical to that of the recess 17, and a height less than the height of this

renfoncement 17 non susceptible d'etre occupee par les fetes des vis 5.  recess 17 not likely to be occupied by the holidays of the screws 5.

Wile est ainsi propre 3 etre engagee etroitement dans le renfoncement 17 jusqu'3 ce que la face de la paroi 25 comportant la nervure 26 se trouve au contact de la face de la paroi 12 dans laquelle debouche le  Wile is thus clean 3 be tightly engaged in the recess 17 until the face of the wall 25 having the rib 26 is in contact with the face of the wall 12 into which the

renfoncement 17.recess 17.

Ainsi qu'il appara^'t de ce qui precede, I'invention fournit une prothese qui remedie aux inconvenients des protheses homologues de la technique anterieure, en ce sens qu'elle ne comporte aucune zone susceptible de fragiliser la structure du plateau intermediaire et de generer des zones d'usure, voire de rupture, prejudiciables a la perennite de la prothese. 11 va de soi que 1 'invention n 'est pas limitee a la forme de realisation decrite ci-dessus a titre d'exemple mais qu'elle en embrasse au contraire toutes les variantes de realisation entrant dans le champ de  As appears from the foregoing, the invention provides a prosthesis which remedies the drawbacks of prostheses homologous to the prior art, in the sense that it does not include any zone liable to weaken the structure of the intermediate plate and to generate areas of wear, or even rupture, detrimental to the durability of the prosthesis. It goes without saying that the invention is not limited to the embodiment described above by way of example but that, on the contrary, it embraces all the variant embodiments falling within the scope of

protection defini par les revendications ci-annexees.  protection defined by the appended claims.

Claims (6)

REVENDICATIONS 1 - Prothese de genou (1) cite "unicompartimentaire", comprenant un element femoral (2) prevu pour reproduire un seul des condyles femoraux, une embase tibiale (3) prevue pour restaurer seulement la zone laterale correspondante du plateau tibial, et un plateau intermediaire (4) en materiau favorisant le glissement, destine a etre monte sur l'embase tibiale (3) et a recevoir ['element femoral (2); prothese (1) caracterisee en ce que: - I'embase tibiale (3) comprend une paroi (12) dans laquelle debouche un renfoncement allonge (17), oriente dans le sens longitudinal de cette em base, c'est-a-dire dans le sens antero- posterieur de ['articulation apres implantation; et - le plateau intermediaire (4) comprend une paroi (25) comportant une nervure (26) faisant saillie d'une face de cette paroi (25), propre 3 etre engagee etroitement dans ledit renfoncement (17) jusqu'a ce que la face de la paroi (25) comportant la nervure (26) se trouve au contact de la face de la paroi (12) de l'embase (3) dans laquelle debouche  1 - Knee prosthesis (1) cited "unicompartmental", comprising a femoral element (2) intended to reproduce only one of the femoral condyles, a tibial base (3) intended to restore only the corresponding lateral zone of the tibial plateau, and a plateau intermediate (4) of material promoting sliding, intended to be mounted on the tibial base (3) and to receive [the femoral element (2); prosthesis (1) characterized in that: - the tibial base (3) comprises a wall (12) into which opens an elongated recess (17), oriented in the longitudinal direction of this em base, that is to say in the anteroposterior direction of the articulation after implantation; and - the intermediate plate (4) comprises a wall (25) comprising a rib (26) projecting from one face of this wall (25), suitable for being engaged closely in said recess (17) until the face of the wall (25) comprising the rib (26) is in contact with the face of the wall (12) of the base (3) into which opens le renfoncement (17).the recess (17). 2- Prothese de genou (1) selon la revendication 1, caracterisee en ce que le renfoncement (17) est delimite par une paroi de fond (15) et par une paroi peripherique (16) raccordant cette paroi de fond au reste de l'embase (3), ladite paroi de fond (15) comprenant au moins un trou (20) amenage a travers elle pour recevoir une vis (5) d'ancrage de l'embase  2- knee prosthesis (1) according to claim 1, characterized in that the recess (17) is delimited by a bottom wall (15) and by a peripheral wall (16) connecting this bottom wall to the rest of the base (3), said bottom wall (15) comprising at least one hole (20) fed through it to receive a screw (5) for anchoring the base tibiale (3) a l'os.tibial (3) to the bone. 3 - Prothese de genou (1) selon la revendication 2, caracterisee en ce que la paroi de fond (15) comprend deux trous (20) distants l'un de l'autre.  3 - Knee prosthesis (1) according to claim 2, characterized in that the bottom wall (15) comprises two holes (20) spaced from each other. 4- Prothese de genou (1) selon l'une des revendications 1 a 3,  4- knee prosthesis (1) according to one of claims 1 to 3, caracterisee en ce que l 'em base tibiale ( 3) et le plateau intermediaire (4) vent symetriques par rapport a un plan transversal median de cette embase  characterized in that the tibial base em (3) and the intermediate plate (4) are symmetrical with respect to a median transverse plane of this base (3) et de ce plateau (4).(3) and this tray (4). - Prothese de genou (1) selon l'une des revendications 1 a 4,  - Knee prosthesis (1) according to one of claims 1 to 4, caracterisee en ce que ledit renfoncement (17), et done ladite nervure (26),  characterized in that said recess (17), and therefore said rib (26), presente une forme oblongue, c'est-a-dire est arrondi a ses extremites.  has an oblong shape, that is to say is rounded at its ends. 6- Prothese de genou (1) selon l'une des revendications 1 a 5,  6- Knee prosthesis (1) according to one of claims 1 to 5, caracterisee en ce que des moyens d'encliquetage vent prevus sur la nervure et sur les parois delimitant le renfoncement, pour assurer la  characterized in that snap-fastening means provided on the rib and on the walls delimiting the recess, to ensure the retention du plateau intermediaire sur l 'em base tibiaie.  retention of the intermediate plateau on the tibial base. 7 - Prothese de genou t1) selon l'une des revendications 2 a 6,  7 - knee prosthesis t1) according to one of claims 2 to 6, caracterisee en ce que ledit trou (20) amenage dans ladite paroi de fond (15) pour recevoir une vis d'ancrage (5) est delimite par une paroi (21) en forme de portion de sphere creuse, et en ce que la vis (5) destinee a etre engagee dans ce trou (20) presente une tete ayant, du cote du corps filete de cette vis (5), une forme en portion de sphere de diametre legerement  characterized in that said hole (20) fitted in said bottom wall (15) to receive an anchoring screw (5) is delimited by a wall (21) in the form of a portion of hollow sphere, and in that the screw (5) intended to be engaged in this hole (20) presents a head having, on the side of the threaded body of this screw (5), a shape in portion of sphere of slightly diameter
FR0205803A 2002-05-10 2002-05-10 Knee prosthesis comprises tibial base with wall in which there is long reinforcement and intermediate plate with comprising wall with projecting rib tightly engaged in reinforcement Withdrawn FR2839442A1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2885031A1 (en) * 2005-05-02 2006-11-03 Patrick Hechard Knee prosthetic part for replacing an articulation between two bones of a human/analogous, comprises a plate, fixer and a two small wings are placed in two planes
EP2617394A1 (en) * 2012-01-19 2013-07-24 Tornier Tibial implant for a unicompartmental knee prosthesis
US8771364B2 (en) 2008-10-17 2014-07-08 Biomet Manufacturing, Llc Tibial tray having a reinforcing member
FR3008605A1 (en) * 2013-07-18 2015-01-23 Medacta Int Sa TIBIAL COMPONENT FOR KNEE JOINT RECONSTRUCTION PROSTHESIS

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0233114A1 (en) * 1986-01-27 1987-08-19 Jean-Alain Epinette Cementfree implanted tibial component of a unicompartimental knee-joint prothesis
US5171276A (en) * 1990-01-08 1992-12-15 Caspari Richard B Knee joint prosthesis
FR2700261A1 (en) * 1993-01-08 1994-07-13 Erato Knee prosthesis for inner or outer lateral fitting
FR2717373A1 (en) * 1994-03-17 1995-09-22 Euros Sa Prosthetic assembly for the knee joint.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0233114A1 (en) * 1986-01-27 1987-08-19 Jean-Alain Epinette Cementfree implanted tibial component of a unicompartimental knee-joint prothesis
US5171276A (en) * 1990-01-08 1992-12-15 Caspari Richard B Knee joint prosthesis
FR2700261A1 (en) * 1993-01-08 1994-07-13 Erato Knee prosthesis for inner or outer lateral fitting
FR2717373A1 (en) * 1994-03-17 1995-09-22 Euros Sa Prosthetic assembly for the knee joint.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2885031A1 (en) * 2005-05-02 2006-11-03 Patrick Hechard Knee prosthetic part for replacing an articulation between two bones of a human/analogous, comprises a plate, fixer and a two small wings are placed in two planes
EP1728490A1 (en) * 2005-05-02 2006-12-06 Patrick Hechard Constituent part of a prothesis for replacing a joint between two bones of a human being or analogue.
US8771364B2 (en) 2008-10-17 2014-07-08 Biomet Manufacturing, Llc Tibial tray having a reinforcing member
EP2617394A1 (en) * 2012-01-19 2013-07-24 Tornier Tibial implant for a unicompartmental knee prosthesis
FR2985901A1 (en) * 2012-01-19 2013-07-26 Tornier Sa TIBIAL IMPLANT FOR A UNICOMPARTIMENTAL GENE PROSTHESIS OR HEMIPROTHESIS, AND CORRESPONDING UNICOMPARTIMENTAL KNEE PROSTHESIS
FR3008605A1 (en) * 2013-07-18 2015-01-23 Medacta Int Sa TIBIAL COMPONENT FOR KNEE JOINT RECONSTRUCTION PROSTHESIS

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