FR2834200A1 - Long bone reconstruction prosthesis has plate attached to existing bone and rod fitting into prosthesis cavity - Google Patents

Long bone reconstruction prosthesis has plate attached to existing bone and rod fitting into prosthesis cavity Download PDF

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Publication number
FR2834200A1
FR2834200A1 FR0117066A FR0117066A FR2834200A1 FR 2834200 A1 FR2834200 A1 FR 2834200A1 FR 0117066 A FR0117066 A FR 0117066A FR 0117066 A FR0117066 A FR 0117066A FR 2834200 A1 FR2834200 A1 FR 2834200A1
Authority
FR
France
Prior art keywords
prosthesis
bone
remaining
tab
prosthesis body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
FR0117066A
Other languages
French (fr)
Inventor
Arnaud Andre Soubeiran
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 FR0117066A priority Critical patent/FR2834200A1/en
Publication of FR2834200A1 publication Critical patent/FR2834200A1/en
Pending 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3607—Femoral heads ; Femoral endoprostheses including proximal or total replacement of the femur
    • 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
    • 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
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • 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
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    • 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
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    • 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
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    • 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
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    • 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
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    • 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
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    • 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
    • A61F2002/3037—Translation along the common longitudinal axis, e.g. piston
    • A61F2002/30372—Translation along the common longitudinal axis, e.g. piston with additional means for limiting said translation
    • 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
    • A61F2002/30492—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a locking pin
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    • 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
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    • 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
    • A61F2002/30565—Special structural features of bone or joint prostheses not otherwise provided for having spring elements
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    • A61F2002/30601—Special structural features of bone or joint prostheses not otherwise provided for telescopic
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    • A61F2002/30672—Features concerning an interaction with the environment or a particular use of the prosthesis temporary
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    • 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
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    • A61F2/02—Prostheses implantable into the body
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    • A61F2002/3678—Geometrical features
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    • A61F2002/4631—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor the prosthesis being specially adapted for being cemented
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    • 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
    • A61F2230/0017—Angular shapes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00011—Metals or alloys
    • A61F2310/00017—Iron- or Fe-based alloys, e.g. stainless steel
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00011—Metals or alloys
    • A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00011—Metals or alloys
    • A61F2310/00029—Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00341—Coral, e.g. aragonite, porite

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

A prosthesis (22), equivalent in shape to the resectioned portion of a long bone (20), is joined to the remaining portion of the bone by a plate (24) inserted into or fastened to its outer surface by fixings (25), and a cylindrical rod (26) that is joined to the plate and inserted into the prosthesis so that the cut surface (21) of the bone makes contact with the end face (28) of the prosthesis. A prosthesis (22), generally equivalent in shape to the resectioned portion of a long bone (20), is joined to the remaining portion of the bone by a plate (24) inserted into it or fastened to its outer surface by fixings (25), and a cylindrical rod (26) that is joined to the plate and inserted into the prosthesis so that the cut surface (21) of the bone makes contact with the end face (28) of the prosthesis. The prosthesis is covered with a material having a Young modulus similar to that of bone,

Description

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PROTHESE DE RECONSTRUCTION APTE A ETRE ASSOCIEE A UNE PORTION D'OS LONG
RESTANT APRES UNE RESECTION D'UNE DES EXTREMITES DE CET OS
La présente invention concerne les prothèses de reconstruction aptes à être associées à une portion d'os long restante après la résection d'une extrémité de cet os long. Ces prothèses sont notamment utilisées dans le cas de tumeur, d'infections graves, de traumatismes importants ou encore après l'échec d'une prothèse articulaire classique, notamment de hanche, pour remplacer l'os réséqué à partir de la surface de coupe réalisée jusqu'à l'articulation. Elles trouvent une application particulièrement avantageuse dans le cas de la reconstruction d'un os long d'un membre inférieur d'un être humain, par exemple un fémur. RECONSTRUCTION PROSTHESIS SUITABLE TO BE ASSOCIATED WITH A LONG BONE PORTION
REMAINING AFTER RESECTING ONE OF THE ENDS OF THIS OS
The present invention relates to reconstruction prostheses capable of being associated with a portion of long bone remaining after resection of one end of this long bone. These prostheses are used in particular in the case of tumor, serious infections, significant trauma or even after the failure of a conventional joint prosthesis, in particular of the hip, to replace the resected bone from the cutting surface produced. up to the joint. They find a particularly advantageous application in the case of the reconstruction of a long bone of a lower limb of a human being, for example a femur.

Dans la suite de la présente description, une telle prothèse, qui fait l'objet de la présente invention, sera dénommée"prothèse de reconstruction".  In the remainder of this description, such a prosthesis, which is the subject of the present invention, will be referred to as "reconstruction prosthesis".

Il existe déjà de telles prothèses, les figures 1 et 2 représentant schématiquement deux modes de réalisation d'une prothèse de reconstruction selon l'art antérieur.  There are already such prostheses, Figures 1 and 2 schematically showing two embodiments of a reconstruction prosthesis according to the prior art.

Par référence aux figures 1 et 2, une telle prothèse comporte essentiellement, sans entrer dans des détails constitutifs, un corps de prothèse 22, d'une forme générale sensiblement équivalente à celle de l'extrémité de l'os qui a été enlevée ou d'une forme déterminée par le praticien en fonction de la nature de la dégradation de l'os long à traiter, et des moyens 23 pour associer ledit corps de prothèse 22 avec la portion d'os restante 20.  With reference to FIGS. 1 and 2, such a prosthesis essentially comprises, without going into constituent details, a prosthesis body 22, of a general shape substantially equivalent to that of the end of the bone which has been removed or d 'a shape determined by the practitioner as a function of the nature of the degradation of the long bone to be treated, and of means 23 for associating said prosthesis body 22 with the remaining bone portion 20.

Sur les deux figures, à titre illustratif pour exemple, le corps de prothèse 22 a une forme générale sensiblement équivalente à celle de l'extrémité proximale d'un fémur et la portion d'os restante 20, est l'extrémité distale du fémur.  In the two figures, by way of illustration for example, the prosthesis body 22 has a general shape substantially equivalent to that of the proximal end of a femur and the remaining bone portion 20, is the distal end of the femur.

La figure 1 représente un des premiers modes de réalisation d'une prothèse de reconstruction qui ont été proposés. Ces moyens 23 comprennent une patte solidaire du corps de prothèse 22 et placée dans le canal médullaire de la partie d'os restante 20, en étant solidarisée à cette partie d'os restante au moyen par exemple de vis ou clavettes 25 qui traversent la patte et l'os, de ciment (par exemple de poly- méthacrylate de méthyle) ou d'un traitement de surface poreux auquel l'os peut accrocher progressivement.  FIG. 1 represents one of the first embodiments of a reconstruction prosthesis which have been proposed. These means 23 comprise a tab secured to the prosthesis body 22 and placed in the medullary canal of the remaining bone part 20, being secured to this remaining bone part by means, for example, of screws or keys 25 which pass through the tab and the bone, cement (for example poly methyl methacrylate) or a porous surface treatment to which the bone can gradually hang.

Or, avec ce mode de réalisation, les contraintes qui s'appliquent à la portion d'os restante sont notablement modifiées par rapport à ce qu'elles étaient avant la  However, with this embodiment, the constraints which apply to the portion of bone remaining are notably modified compared to what they were before the

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résection, ce qui conduit au remodelage de l'os et souvent à la résorption en l'absence de charge suffisante, ou ostéolyse, de la portion du côté du corps de prothèse 22 (la libération de débris par la prothèse est parfois considérée comme un autre facteur d'ostéolyse). Ce phénomène limite souvent la longévité de la reconstruction effectuée et complique notablement les tentatives ultérieures de reconstruction.  resection, which leads to bone remodeling and often resorption in the absence of sufficient load, or osteolysis, of the portion on the side of the prosthesis body 22 (the release of debris by the prosthesis is sometimes considered to be a other osteolysis factor). This phenomenon often limits the longevity of the reconstruction carried out and significantly complicates subsequent reconstruction attempts.

Pour tenter de limiter ce phénomène, il a été proposé une solution comme celle qui est illustrée sur la figure 2. Dans cette réalisation, on cherche à maintenir constamment une contrainte sur la portion d'os restante du côté du corps de prothèse 22. Schématiquement, cette réalisation comporte les mêmes moyens que ceux décrits en regard de la figure 1, mais la fixation de la patte dans le canal médullaire est effectuée au moyen de vis ou clavettes relativement distantes de la surface de coupe 21 de la partie d'os restante 20, en laissant un espace entre cette surface de coupe 21 et l'extrémité du corps de prothèse avec laquelle est solidarisée la patte, et en disposant dans cet espace un élément élastique sous charge, comme un ressort comprimé, qui produit un effort de pression sur cette surface de coupe 21 et donc une contrainte dans la partie osseuse habituellement susceptible d'ostéolyse.  In an attempt to limit this phenomenon, a solution has been proposed such as that which is illustrated in FIG. 2. In this embodiment, it is sought to constantly maintain a stress on the portion of bone remaining on the side of the prosthesis body 22. Schematically , this embodiment comprises the same means as those described with reference to FIG. 1, but the fixing of the tab in the medullary canal is carried out by means of screws or keys relatively distant from the cutting surface 21 of the remaining bone part 20, leaving a space between this cutting surface 21 and the end of the prosthesis body with which the tab is secured, and by placing in this space an elastic element under load, such as a compressed spring, which produces a pressure force on this cutting surface 21 and therefore a stress in the bone part usually susceptible to osteolysis.

Cependant, une telle prothèse de reconstruction est plus coûteuse du fait du nombre de ses composants et plus longue et compliquée à implanter que les prothèses traditionnelles. Elle engendre aussi parfois des fractures secondaires à la hauteur de la zone de verrouillage.  However, such a reconstruction prosthesis is more expensive because of the number of its components and longer and more complicated to implant than traditional prostheses. It also sometimes causes secondary fractures at the height of the locking zone.

Aussi, la présente invention a-t-elle pour but de réaliser une prothèse de reconstruction qui trouve une application plus particulièrement avantageuse dans le cas de la reconstruction d'un os long d'un membre inférieur, comme un fémur, qui soit plus facile à implanter que les prothèses de reconstruction selon l'art antérieur et qui permette le maintien, dans la portion d'os long restante, d'un état de contraintes aussi proche que possible de celui généré en l'absence de résection, par exemple quand le patient se déplace.  Also, the present invention aims to achieve a reconstruction prosthesis which finds a more particularly advantageous application in the case of the reconstruction of a long bone of a lower limb, such as a femur, which is easier to implant only the reconstruction prostheses according to the prior art and which allows the maintenance, in the remaining long bone portion, of a stress state as close as possible to that generated in the absence of resection, for example when the patient moves.

Plus précisément, la présente invention a pour objet une prothèse de reconstruction apte à être associée à une portion d'os long restante après une résection d'une extrémité de cet os long, pour restaurer ledit os long sensiblement dans sa configuration originelle, la prothèse comportant un corps de prothèse d'une forme générale sensiblement équivalente à celle de l'extrémité de l'os long enlevée  More specifically, the present invention relates to a reconstruction prosthesis capable of being associated with a portion of long bone remaining after resection of one end of this long bone, to restore said long bone substantially to its original configuration, the prosthesis comprising a prosthesis body of a general shape substantially equivalent to that of the end of the long bone removed

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pour la résection et qui prend sa place à partir de la surface de coupe, et des moyens pour associer ledit corps de prothèse avec ladite portion d'os restante, caractérisée par le fait que les moyens pour associer ledit corps de prothèse avec ladite portion d'os restante sont constitués par : - une patte, - des moyens pour solidariser ladite patte avec la portion d'os restante, - une tige sensiblement cylindrique solidaire de ladite patte, - un logement réalisé dans ledit corps de prothèse, ledit logement ayant une section transversale sensiblement complémentaire de celle de ladite tige sensiblement cylindrique, ladite tige sensiblement cylindrique étant montée coulissante en translation dans ledit logement, ledit logement étant en outre réalisé dans ledit corps de prothèse de façon que ledit corps de prothèse soit apte à venir, par une surface de portée, en appui contre la surface de coupe quand ladite patte est solidaire de ladite portion d'os restante.  for resection and which takes its place from the cutting surface, and means for associating said prosthesis body with said remaining bone portion, characterized in that the means for associating said prosthesis body with said portion d 'remaining bone are constituted by: - a tab, - means for securing said tab with the remaining bone portion, - a substantially cylindrical rod integral with said tab, - a housing produced in said prosthesis body, said housing having a cross section substantially complementary to that of said substantially cylindrical rod, said substantially cylindrical rod being slidably mounted in translation in said housing, said housing being further produced in said prosthesis body so that said prosthesis body is capable of coming, by a bearing surface, pressing against the cutting surface when said tab is integral with said remaining bone portion.

D'autres caractéristiques et avantages de la présente invention apparaîtront au cours de la description suivante donnée en regard des dessins annexés à titre illustratif mais nullement limitatif, dans lesquels :
Les figures 1 et 2 représentent, vus en coupe partielle et sous forme schématique, deux modes de réalisation d'une prothèse de reconstruction selon l'art antérieur qui ont été décrits dans le préambule de la présente description,
Les figures 3 et 4 représentent deux vues en coupes partielles d'un mode de réalisation d'une prothèse de reconstruction selon l'invention, la figure 3 étant une vue en coupe longitudinale et la figure 4 une vue en coupe transversale référencée IV-IV sur la figure 3,
Les figures 5 et 6 représentent deux vues en coupes partielles d'un autre mode de réalisation d'une prothèse de reconstruction selon l'invention, la figure 5 étant une vue en coupe longitudinale et la figure 6 une vue en coupe transversale référencée VI-VI sur la figure 5, et
La figure 7 représente, sous forme schématique, un mode de réalisation perfectionné d'une partie de la prothèse de reconstruction selon les figures 3 à 6. Other characteristics and advantages of the present invention will appear during the following description given with reference to the drawings annexed by way of illustration but in no way limitative, in which:
FIGS. 1 and 2 represent, seen in partial section and in schematic form, two embodiments of a reconstruction prosthesis according to the prior art which have been described in the preamble of this description,
Figures 3 and 4 show two partial sectional views of an embodiment of a reconstruction prosthesis according to the invention, Figure 3 being a longitudinal sectional view and Figure 4 a cross-sectional view referenced IV-IV in Figure 3,
FIGS. 5 and 6 represent two views in partial sections of another embodiment of a reconstruction prosthesis according to the invention, FIG. 5 being a view in longitudinal section and FIG. 6 a view in cross section referenced VI- VI in Figure 5, and
FIG. 7 represents, in schematic form, an improved embodiment of part of the reconstruction prosthesis according to FIGS. 3 to 6.

Il est précisé que, bien que les figures représentent plusieurs modes de réalisation de la prothèse de reconstruction selon l'invention, les mêmes références y désignent les mêmes éléments, quelle que soit la figure sur laquelle elles apparaissent et quelle que soit la forme de représentation de ces éléments. De  It is specified that, although the figures represent several embodiments of the reconstruction prosthesis according to the invention, the same references designate the same elements there, whatever the figure on which they appear and whatever the form of representation of these elements. Of

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même, si des éléments ne sont pas spécifiquement référencés sur l'une des figures, leurs références peuvent être aisément retrouvées en se reportant à une autre figure.  even, if elements are not specifically referenced in one of the figures, their references can be easily found by referring to another figure.

Le Demandeur tient à préciser que les figures 3 à 7 représentent trois modes de réalisation de l'objet selon l'invention mais qu'il peut en exister d'autres qui répondent à la définition de cette invention.  The Applicant wishes to specify that FIGS. 3 to 7 represent three embodiments of the object according to the invention but that there may be others which meet the definition of this invention.

Il précise en outre que, lorsque, selon la définition de l'invention, l'objet de l'invention comporte"au moins un élément ayant une fonction donnée, le mode de réalisation décrit peut comporter plusieurs de ces éléments.  It also specifies that, when, according to the definition of the invention, the object of the invention comprises "at least one element having a given function, the embodiment described may include several of these elements.

Il précise aussi que, si un mode de réalisation de l'objet selon l'invention tel qu'illustré comporte plusieurs éléments de fonction identique et que si, dans la description, il n'est pas spécifié que l'objet selon cette invention doit obligatoirement comporter un nombre particulier de ces éléments, l'objet de l'invention pourra être défini comme comportant"au moins un"de ces éléments.  It also specifies that, if an embodiment of the object according to the invention as illustrated comprises several elements of identical function and that if, in the description, it is not specified that the object according to this invention must necessarily include a particular number of these elements, the object of the invention may be defined as comprising "at least one" of these elements.

Trois modes de réalisation de l'objet de l'invention sont représentés sur les figures 3 à 7, les figures 1 et 2 illustrant des modes de réalisation selon l'art antérieur qui ont été décrits ci-dessus au préambule.  Three embodiments of the object of the invention are shown in Figures 3 to 7, Figures 1 and 2 illustrating embodiments according to the prior art which have been described above in the preamble.

Par référence aux figures 3 à 7, l'invention concerne une prothèse de reconstruction P apte à être associée à une portion d'os long 20 restante après la résection d'une extrémité de cet os, par exemple son extrémité proximale.  With reference to FIGS. 3 to 7, the invention relates to a reconstruction prosthesis P capable of being associated with a portion of long bone 20 remaining after resection of one end of this bone, for example its proximal end.

Cette prothèse de reconstruction P comporte un corps de prothèse 22 d'une forme générale sensiblement équivalente à celle de l'extrémité réséquée, et des moyens 23 pour associer le corps de prothèse 22 avec la portion d'os restante 20.  This reconstruction prosthesis P comprises a prosthesis body 22 of a general shape substantially equivalent to that of the resected end, and means 23 for associating the prosthesis body 22 with the remaining bone portion 20.

Sur les figures, un tel corps de prothèse 22 a été représenté schématiquement, à titre purement illustratif, par une patte de prothèse"pp"et une tête de prothèse"tp". Ces éléments sont bien connus en eux-mêmes et ne seront donc pas plus amplement décrits ici.  In the figures, such a prosthesis body 22 has been shown schematically, purely by way of illustration, by a prosthesis tab "pp" and a prosthesis head "tp". These elements are well known in themselves and will therefore not be described more fully here.

Selon une caractéristique de l'invention, les moyens 23 pour associer le corps de prothèse 22 avec la portion d'os restante 20 sont constitués par une patte 24, des moyens 25 pour solidariser cette patte 24 avec la portion d'os restante 20, une tige sensiblement cylindrique 26 solidaire de la patte 24, un logement 27 réalisé dans le corps de prothèse 22, ce logement ayant une section transversale sensiblement complémentaire de celle de la tige sensiblement cylindrique 26, cette tige sensiblement cylindrique 26 étant montée coulissante en translation dans le logement 27, le logement étant en outre réalisé dans le corps de prothèse 22 de  According to a characteristic of the invention, the means 23 for associating the prosthesis body 22 with the remaining bone portion 20 are constituted by a lug 24, means 25 for securing this lug 24 with the remaining bone portion 20, a substantially cylindrical rod 26 integral with the tab 24, a housing 27 produced in the prosthesis body 22, this housing having a cross section substantially complementary to that of the substantially cylindrical rod 26, this substantially cylindrical rod 26 being slidably mounted in translation in the housing 27, the housing being further produced in the prosthesis body 22 of

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façon que le corps de prothèse soit apte à venir, par une surface de portée 28, en appui contre la surface de coupe 21 quand la patte 24 est solidaire de la portion d'os restante 20.  so that the prosthesis body is capable of coming, by a bearing surface 28, to bear against the cutting surface 21 when the tab 24 is integral with the remaining bone portion 20.

Il est possible de donner à la patte 24 différentes formes en fonction notamment de la partie osseuse sur laquelle cette patte doit être fixée ou des préférences du chirurgien. Sur les figures 3 à 6, sont illustrés deux modes de réalisation possibles de cette patte 24.  It is possible to give the tab 24 different shapes depending in particular on the bone part on which this tab must be fixed or the preferences of the surgeon. In FIGS. 3 to 6, two possible embodiments of this tab 24 are illustrated.

La patte 24 selon le mode de réalisation illustré sur les figures 3 et 4 est conformée pour être apte à être enfichée dans le canal médullaire 30 de la portion d'os restante 20 après alésage connu du canal médullaire si nécessaire, tandis que la patte 24 selon le mode de réalisation illustré sur les figures 5 et 6 est conformée, par exemple en plaque ou analogue, pour être apte à être appliquée extérieurement contre une face externe 31 de la portion d'os restante 20.  The tab 24 according to the embodiment illustrated in Figures 3 and 4 is shaped to be able to be inserted into the medullary canal 30 of the remaining bone portion 20 after known bore of the medullary canal if necessary, while the tab 24 according to the embodiment illustrated in FIGS. 5 and 6 is shaped, for example in plate or the like, so as to be able to be applied externally against an external face 31 of the remaining bone portion 20.

Dans le cas du mode de réalisation selon les figures 3 et 4, la patte 24 et la tige 26 peuvent être réalisées d'une seule pièce, la section de la patte 24 étant adaptée à sa liaison à l'os et celle de la tige 26 à sa liaison avec le corps de prothèse 22.  In the case of the embodiment according to Figures 3 and 4, the tab 24 and the rod 26 can be made in one piece, the section of the tab 24 being adapted to its connection to the bone and that of the rod 26 at its connection with the prosthesis body 22.

Dans une réalisation préférentielle, la surface de portée 28 réalisée sur le corps de prothèse 22 est en un matériau ayant un module d'Young sensiblement égal à celui de l'os. Cette surface de portée peut être réalisée dans une rondelle ou analogue en ce matériau fixée sur le corps de prothèse. Il est cependant possible que le corps de prothèse 22 soit lui-même réalisé dans ce matériau, cette dernière solution présentant l'avantage de ne pas nécessiter l'ajout d'une rondelle sur le corps de prothèse.  In a preferred embodiment, the bearing surface 28 produced on the prosthesis body 22 is made of a material having a Young's modulus substantially equal to that of the bone. This bearing surface can be produced in a washer or the like made of this material fixed to the prosthesis body. It is however possible that the prosthesis body 22 is itself made of this material, the latter solution having the advantage of not requiring the addition of a washer on the prosthesis body.

Le matériau ayant un module d'Young sensiblement égal à celui de l'os est par exemple du Poly-Ether-Ether-Cétone (PEEK) ou encore un matériau biologique tel que de l'os de banque ou du corail.  The material having a Young's modulus substantially equal to that of the bone is for example Poly-Ether-Ether-Ketone (PEEK) or also a biological material such as bank bone or coral.

Il est également avantageux, comme représenté sur les figures 4 et 6, que les sections transversales complémentaires de la tige cylindrique 26 et du logement 27 soient de forme polygonale ou analogue de façon à ne permettre que la translation de la tige cylindrique 26 dans le logement 27 sans autoriser la rotation du corps de prothèse 22 par rapport à la portion d'os restante 20.  It is also advantageous, as shown in FIGS. 4 and 6, for the complementary cross sections of the cylindrical rod 26 and of the housing 27 to be of polygonal or similar shape so as to allow only translation of the cylindrical rod 26 in the housing 27 without allowing the prosthesis body 22 to rotate relative to the remaining bone portion 20.

<Desc/Clms Page number 6> <Desc / Clms Page number 6>

Quant aux moyens 25 pour solidariser la patte 24 avec la portion d'os restante 20, ils peuvent être constitués de différentes façons, par exemple par des vis, goupilles, du ciment ou analogue, toutes connues en elles-mêmes.  As for the means 25 for securing the tab 24 with the remaining bone portion 20, they can be formed in different ways, for example by screws, pins, cement or the like, all known in themselves.

Pour obtenir les buts de la présente invention et éviter au maximum l'apparition du phénomène de l'ostéolyse comme explicité ci-avant, il est souhaitable que la surface de portée 28 du corps de prothèse 22 soit au moins égale à la surface de coupe 21 de la portion d'os restante 20 de façon que la surface de portée 28 du corps de prothèse 22 recouvre complètement, sans jeu, la surface de coupe 21 de la portion d'os restante 20. Elle peut cependant avantageusement déborder de quelques millimètres de la surface de coupe, particulièrement dans le cas d'un implant pédiatrique en prévision d'une croissance osseuse en diamètre que l'on espère maintenir. Il est en outre préférable que la direction de la translation de la tige sensiblement cylindrique 26 dans le logement 27 soit sensiblement parallèle à celle du canal médullaire de l'os long.  To obtain the aims of the present invention and to avoid as much as possible the appearance of the phenomenon of osteolysis as explained above, it is desirable that the bearing surface 28 of the prosthesis body 22 is at least equal to the cutting surface 21 of the remaining bone portion 20 so that the bearing surface 28 of the prosthesis body 22 completely covers, without play, the cutting surface 21 of the remaining bone portion 20. It can however advantageously extend beyond a few millimeters of the cutting surface, particularly in the case of a pediatric implant in anticipation of bone growth in diameter which it is hoped to maintain. It is further preferable that the direction of translation of the substantially cylindrical rod 26 in the housing 27 is substantially parallel to that of the medullary canal of the long bone.

La prothèse de reconstruction suivant l'invention peut en outre avantageusement comporter, comme illustré sur la figure 7, des moyens 29 pour maintenir rigidement en position la patte 24 par rapport au corps de prothèse 22 jusqu'à ce que la fixation de la patte 24 à la portion d'os restante 20 ait été achevée.  The reconstruction prosthesis according to the invention may also advantageously comprise, as illustrated in FIG. 7, means 29 for rigidly holding in position the tab 24 relative to the prosthesis body 22 until the fixing of the tab 24 to the remaining bone portion 20 has been completed.

Lesdits moyens 29 sont alors retirés, autorisant la translation éventuelle des deux composants. Ces moyens 29 sont, par exemple, constitués d'une clavette 32 et de deux percées 33,34 respectivement réalisées dans le corps de prothèse 22 au niveau du logement 27 et, dans le mode de réalisation illustré, dans la tige 26 puisque cette dernière est solidaire de la patte 24. En présence de la clavette, les percées sont maintenues alignées et la translation est bloquée. Quand la clavette est retirée, la translation est libre et bloquée dans un sens par l'appui sur l'os, permettant de lui transférer les efforts de compression générés par exemple par la marche, et dans l'autre sens par la tension musculaire. Said means 29 are then removed, authorizing the possible translation of the two components. These means 29 are, for example, made up of a key 32 and two holes 33, 34 respectively produced in the prosthesis body 22 at the level of the housing 27 and, in the embodiment illustrated, in the rod 26 since the latter is secured to the tab 24. In the presence of the key, the holes are kept aligned and the translation is blocked. When the key is removed, translation is free and blocked in one direction by pressing on the bone, allowing it to transfer the compression forces generated for example by walking, and in the other direction by muscle tension.

Il est aussi possible de prévoir des moyens pour limiter la course de la translation.  It is also possible to provide means for limiting the travel of the translation.

La pose d'une telle prothèse de reconstruction et le traitement qui peut être pratiqué avec ce genre de prothèse de reconstruction sont bien connus en eux- mêmes et ne seront donc pas spécifiquement décrits ici, d'autant plus qu'ils n'entrent pas dans le champ de protection de l'invention, en précisant que la clavette 32 doit être enlevée quand l'implantation de la prothèse est achevée.  The installation of such a reconstruction prosthesis and the treatment which can be practiced with this kind of reconstruction prosthesis are well known in themselves and will therefore not be specifically described here, especially since they do not enter in the protective field of the invention, by specifying that the key 32 must be removed when the implantation of the prosthesis is completed.

<Desc/Clms Page number 7> <Desc / Clms Page number 7>

En l'absence des moyens 29, il convient de préalablement fixer la patte 24 seule avec précision, en particulier angulairement, à la portion d'os restante 20 avant de rapporter le corps de prothèse 22 sur la tige 26.  In the absence of the means 29, the lug 24 alone must be fixed beforehand with precision, in particular angularly, to the remaining bone portion 20 before bringing the prosthesis body 22 back onto the rod 26.

Il est aussi bien précisé que les matériaux utilisables pour la réalisation de la prothèse de reconstruction selon l'invention, sauf quand ils sont explicitement mentionnés, sont les matériaux pour implants de l'art antérieur comme du titane, de l'acier au chrome cobalt, etc.  It is also well specified that the materials which can be used for the production of the reconstruction prosthesis according to the invention, except when they are explicitly mentioned, are the materials for implants of the prior art such as titanium, chromium cobalt steel , etc.

Il est immédiatement apparent que, avec une prothèse de reconstruction selon l'invention telle que décrite ci-dessus, les efforts de flexion et de rotation sont transmis depuis le corps de prothèse à la portion d'os restante 20 par l'intermédiaire de la patte 24. En revanche, les efforts de compression appliqués sur le corps de prothèse, par exemple lors de la marche du patient, sont intégralement transmis sur la surface de coupe 21 de la portion d'os restante 20 et donc à toute ladite portion d'os long restante, puisque le corps de prothèse est monté en translation par rapport à la patte 24, via la tige cylindrique 26 coulissant dans le logement 27 It is immediately apparent that, with a reconstruction prosthesis according to the invention as described above, the bending and rotational forces are transmitted from the prosthesis body to the remaining bone portion 20 via the tab 24. On the other hand, the compression forces applied to the prosthesis body, for example when the patient is walking, are fully transmitted to the cutting surface 21 of the remaining bone portion 20 and therefore to all of said portion d long bone remaining, since the prosthesis body is mounted in translation relative to the tab 24, via the cylindrical rod 26 sliding in the housing 27

Claims (9)

REVENDICATIONS 1. Prothèse de reconstruction (P) apte à être associée à une portion d'os long restante (20) après une résection d'une extrémité de cet os long, ladite prothèse devant être associée à cette portion d'os long restante pour restaurer ledit os long sensiblement dans sa configuration originelle, comportant un corps de prothèse (22) d'une forme générale sensiblement équivalente à celle de l'extrémité enlevée pour la résection et qui prend sa place à partir de la surface de coupe (21), et des moyens (23) pour associer ledit corps de prothèse (22) avec ladite portion d'os restante (20), caractérisée par le fait que les moyens (23) pour associer ledit corps de prothèse (22) avec ladite portion d'os restante (20) sont constitués par : - une patte (24), - des moyens (25) pour solidariser ladite patte (24) avec la portion d'os restante (20), - une tige sensiblement cylindrique (26) solidaire de ladite patte (24), - un logement (27) réalisé dans ledit corps de prothèse (22), ledit logement ayant une section transversale sensiblement complémentaire de celle de ladite tige sensiblement cylindrique (26), ladite tige sensiblement cylindrique (26) étant montée coulissante en translation dans ledit logement (27), ledit logement étant en outre réalisé dans ledit corps de prothèse (22) de façon que ledit corps de prothèse soit apte à venir, par une surface de portée (28), en appui contre la surface de coupe (21) quand ladite patte (24) est solidaire de la portion d'os restante (20). 1. Reconstruction prosthesis (P) able to be associated with a portion of long bone remaining (20) after resection of one end of this long bone, said prosthesis having to be associated with this portion of long bone remaining to restore said long bone substantially in its original configuration, comprising a prosthesis body (22) of a general shape substantially equivalent to that of the end removed for resection and which takes its place from the cutting surface (21), and means (23) for associating said prosthesis body (22) with said remaining bone portion (20), characterized in that the means (23) for associating said prosthesis body (22) with said portion of remaining bone (20) are constituted by: - a lug (24), - means (25) for securing said lug (24) with the remaining bone portion (20), - a substantially cylindrical rod (26) integral with said tab (24), - a housing (27) made in said prosthesis body (22), said housing having a cross section substantially complementary to that of said substantially cylindrical rod (26), said substantially cylindrical rod (26) being slidably mounted in translation in said housing (27), said housing being further produced in said prosthesis body (22) so that said prosthesis body is capable of coming, by a bearing surface (28), to bear against the cutting surface (21) when said tab (24) is integral with the portion d 'bone remaining (20). 2. Prothèse selon la revendication 1, caractérisée par le fait que ladite patte (24) est conformée pour être apte à être enfichée dans le canal médullaire (30) de la portion d'os restante (20).  2. Prosthesis according to claim 1, characterized in that said tab (24) is shaped to be able to be inserted in the medullary canal (30) of the remaining portion of bone (20). 3. Prothèse selon la revendication 1, caractérisée par le fait que ladite patte (24) est conformée pour être apte à être plaquée extérieurement contre une face externe (31) de la portion d'os restante (20).  3. Prosthesis according to claim 1, characterized in that said tab (24) is shaped to be able to be pressed externally against an external face (31) of the remaining bone portion (20). <Desc/Clms Page number 9> <Desc / Clms Page number 9> 4. Prothèse selon l'une des revendications 1 à 3, caractérisée par le fait que ladite surface de portée (28) réalisée sur ledit corps de prothèse (22) est en un matériau ayant un module d'Young sensiblement égal à celui de l'os.  4. Prosthesis according to one of claims 1 to 3, characterized in that said bearing surface (28) produced on said prosthesis body (22) is made of a material having a Young's modulus substantially equal to that of the 'bone. 5. Prothèse selon la revendication 4, caractérisée par le fait que ledit matériau ayant un module d'Young sensiblement égal à celui de l'os est l'un des matériaux suivants : du Poly-Ether-Ether-Cétone (PEEK), de l'os de banque ou du corail.  5. Prosthesis according to claim 4, characterized in that said material having a Young's modulus substantially equal to that of bone is one of the following materials: Poly-Ether-Ether-Ketone (PEEK), bank or coral bone. 6. Prothèse selon l'une des revendications 1 à 5, caractérisée par le fait que les sections transversales complémentaires de la tige sensiblement cylindrique (26) et du logement (27) sont de forme polygonale.  6. Prosthesis according to one of claims 1 to 5, characterized in that the complementary cross sections of the substantially cylindrical rod (26) and of the housing (27) are of polygonal shape. 7. Prothèse selon l'une des revendications 1 à 6, caractérisée par le fait que les moyens (25) pour solidariser ladite patte (24) avec la portion d'os restante sont constitués par au moins l'un des moyens suivants : vis, goupilles, ciment.  7. Prosthesis according to one of claims 1 to 6, characterized in that the means (25) for securing said tab (24) with the remaining bone portion are constituted by at least one of the following means: screw , pins, cement. 8. Prothèse selon l'une des revendications 1 à 7, caractérisée par le fait que la surface de portée (28) du corps de prothèse (22) est au moins égale à la surface de coupe (21) de la portion d'os restante (20).  8. Prosthesis according to one of claims 1 to 7, characterized in that the bearing surface (28) of the prosthesis body (22) is at least equal to the cutting surface (21) of the bone portion remaining (20). 9. Prothèse selon l'une des revendications 1 à 8, caractérisée par le fait qu'elle comporte des moyens (29) pour maintenir rigidement en position ladite patte (24) par rapport audit corps de prothèse (22) jusqu'à ce que la fixation de la patte (24) à la portion d'os restante (20) ait été achevée. 9. Prosthesis according to one of claims 1 to 8, characterized in that it comprises means (29) for rigidly holding in position said tab (24) relative to said prosthesis body (22) until the attachment of the tab (24) to the remaining bone portion (20) has been completed.
FR0117066A 2001-12-31 2001-12-31 Long bone reconstruction prosthesis has plate attached to existing bone and rod fitting into prosthesis cavity Pending FR2834200A1 (en)

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US8298240B2 (en) 2006-04-06 2012-10-30 Synthes (Usa) Remotely adjustable tissue displacement device

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FR2614524A1 (en) * 1987-04-30 1988-11-04 Butel Jean Improvement to the femoral part of hip prostheses
DE3822854A1 (en) * 1988-07-06 1990-01-11 Roland Man Druckmasch Joint prosthesis for a hip joint
FR2651118A1 (en) * 1989-08-30 1991-03-01 Aubaniac Jean Cementless hip prosthesis
EP0579563A1 (en) * 1992-07-16 1994-01-19 Medinov Sa Femoral prosthetic assembly
WO1994007438A1 (en) * 1992-10-01 1994-04-14 Tronzo Raymond G Bearing mechanism built into the femoral component
DE19529988C1 (en) * 1995-08-16 1997-03-06 Frank Dr Med Lampe Endoprosthesis for hip joint
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FR2614524A1 (en) * 1987-04-30 1988-11-04 Butel Jean Improvement to the femoral part of hip prostheses
DE3822854A1 (en) * 1988-07-06 1990-01-11 Roland Man Druckmasch Joint prosthesis for a hip joint
FR2651118A1 (en) * 1989-08-30 1991-03-01 Aubaniac Jean Cementless hip prosthesis
EP0579563A1 (en) * 1992-07-16 1994-01-19 Medinov Sa Femoral prosthetic assembly
WO1994007438A1 (en) * 1992-10-01 1994-04-14 Tronzo Raymond G Bearing mechanism built into the femoral component
DE19529988C1 (en) * 1995-08-16 1997-03-06 Frank Dr Med Lampe Endoprosthesis for hip joint
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8016837B2 (en) 2006-04-06 2011-09-13 Synthes Usa, Llc Remotely adjustable tissue displacement device
US8298240B2 (en) 2006-04-06 2012-10-30 Synthes (Usa) Remotely adjustable tissue displacement device
US8894663B2 (en) 2006-04-06 2014-11-25 DePuy Synthes Products, LLC Remotely adjustable tissue displacement device
US9259243B2 (en) 2006-04-06 2016-02-16 DePuy Synthes Products, Inc. Remotely adjustable tissue displacement device
US10105130B2 (en) 2006-04-06 2018-10-23 DePuy Synthes Products, Inc. Remotely adjustable tissue displacement device

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