FR2948557A1 - Bone joint prosthesis for use in orthopedic hip surgery, has rod comprising elements supported against wall of bone, and filaments terminating with electrodes arranged at end of rod and permitting liquefaction of heat-sealable material - Google Patents

Bone joint prosthesis for use in orthopedic hip surgery, has rod comprising elements supported against wall of bone, and filaments terminating with electrodes arranged at end of rod and permitting liquefaction of heat-sealable material Download PDF

Info

Publication number
FR2948557A1
FR2948557A1 FR0903814A FR0903814A FR2948557A1 FR 2948557 A1 FR2948557 A1 FR 2948557A1 FR 0903814 A FR0903814 A FR 0903814A FR 0903814 A FR0903814 A FR 0903814A FR 2948557 A1 FR2948557 A1 FR 2948557A1
Authority
FR
France
Prior art keywords
bone
rod
prosthesis
heat
medullary stem
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Withdrawn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
FR0903814A
Other languages
French (fr)
Inventor
Ernest Aillaud
Colette Burellli
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.)
BURELLI COLETTE
Original Assignee
BURELLI COLETTE
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 BURELLI COLETTE filed Critical BURELLI COLETTE
Priority to FR0903814A priority Critical patent/FR2948557A1/en
Publication of FR2948557A1 publication Critical patent/FR2948557A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • 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
    • A61F2/40—Joints for shoulders
    • A61F2/4059—Humeral shafts
    • 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
    • A61F2/48—Operating or control means, e.g. from outside the body, control of sphincters
    • A61F2/484—Fluid means, i.e. hydraulic or pneumatic
    • 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
    • A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
    • A61F2002/3006—Properties of materials and coating materials
    • A61F2002/30065—Properties of materials and coating materials thermoplastic, i.e. softening or fusing when heated, and hardening and becoming rigid again when cooled
    • 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
    • A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
    • A61F2002/3006—Properties of materials and coating materials
    • A61F2002/30065—Properties of materials and coating materials thermoplastic, i.e. softening or fusing when heated, and hardening and becoming rigid again when cooled
    • A61F2002/30067—Coating or prosthesis-covering structure made of thermoplastic material
    • 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
    • A61F2002/30579—Special structural features of bone or joint prostheses not otherwise provided for with mechanically expandable devices, e.g. fixation devices
    • 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
    • A61F2002/30581—Special structural features of bone or joint prostheses not otherwise provided for having a pocket filled with fluid, e.g. liquid
    • A61F2002/30583—Special structural features of bone or joint prostheses not otherwise provided for having a pocket filled with fluid, e.g. liquid filled with hardenable fluid, e.g. curable in-situ
    • 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
    • A61F2002/30593—Special structural features of bone or joint prostheses not otherwise provided for hollow
    • 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
    • A61F2/30907—Nets or sleeves applied to surface of prostheses or in cement
    • A61F2002/30917—Nets or sleeves applied to surface of prostheses or in cement for avoiding direct contact between bone and implant, e.g. extensible membrane for preventing contamination or for easy removal
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A61F2002/3678—Geometrical features
    • A61F2002/3694—Geometrical features with longitudinal bores
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2002/4619—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof for extraction
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2002/465—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor using heating means
    • 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
    • A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2210/0071—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof thermoplastic
    • 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
    • A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2210/0085—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof hardenable in situ, e.g. epoxy resins

Abstract

The prosthesis has a metal medullary rod (1) comprising radially expansible elements e.g. pistons (5), supported against an internal wall of a bone (7) by an action of a heat-sealable material (9) injected in an axial channel of the rod. The heat-sealable material is solidified in order to block the prosthesis in place. Insulated electric heating filaments terminate with electrodes arranged at an external end (3) of the rod, and permit liquefaction of the heat-sealable material.

Description

PROTHESE ARTICULAIRE OSSEUSE A TIGE INTRAMEDULLAIRE AJUSTABLE ANATOMIQUEMENT La présente invention a pour objet une prothèse articulaire osseuse à tige intra médullaire ajustable anatomiquement. The present invention relates to an anatomically adjustable intra-medullary bone articular prosthesis with an intra-medullary stem.

Elle est destinée à être utilisée en chirurgie orthopédique, en particulier 15 dans le cadre des prothèses de la hanche. It is intended to be used in orthopedic surgery, particularly in the context of hip prostheses.

Dans les dispositifs connus de ce genre, il est fait appel à deux principes de base, la fixation de la prothèse sur le fémur pas scellement au ciment chirurgical et la fixation sans scellement dite sans ciment . Dans le premier cas, le remplacement de la prothèse, souvent nécessaire à une ou plusieurs reprises par suite de l'évolution de l'état du patient, est rendu très difficile en raison des problèmes de démontage entraînés par la présence de ciment. 25 Le principal inconvénient des prothèses sans ciment, qui peuvent être vissées ou montées à force dans la cavité médullaire, est un prix de revient très élevé, du au fait qu'elles doivent être parfaitement ajustées à chaque os récepteur, ce qui impose soit une fabrication sur mesure, soit l'existence de 30 nombreux modèles de dimensions et de formes différentes. In known devices of this kind, two basic principles are used, the fixation of the prosthesis on the femur not cemented to the surgical cement and the fixation without cement-free sealing. In the first case, the replacement of the prosthesis, often necessary on one or more occasions as a result of the evolution of the patient's condition, is made very difficult because of the disassembly problems caused by the presence of cement. The main disadvantage of non-cemented prostheses, which can be screwed or forced into the medullary cavity, is a very high cost, because they must be perfectly adjusted to each receiving bone, which imposes either a custom manufacturing, the existence of many models of different sizes and shapes.

Le dispositif suivant la présente invention supprime tous ces inconvénients. En effet, il permet d'obtenir, à partir d'un très petit nombre de modèles différents, des prothèses parfaitement ajustées et pouvant être 35 démontées. 20 De plus, la durée de l'anesthésie pour chaque patient peut être divisée par 3 ou 4, et la fabrication de prothèses sur mesure qui est ponctuelle et très onéreuse se trouve généralisée à un coût très inférieur. The device according to the present invention eliminates all these disadvantages. Indeed, it makes it possible to obtain, from a very small number of different models, perfectly adjusted prostheses that can be disassembled. In addition, the duration of the anesthesia for each patient can be divided by 3 or 4, and the manufacture of customized prostheses which is punctual and very expensive is generalized at a much lower cost.

10 II est constitué par une tige médullaire comportant un ou plusieurs éléments expansibles radialement pouvant être appuyés fortement contre la paroi interne de l'os par l'action de matière thermo-fusible injectée à chaud et sous pression dans un canal axial de la tige, et dont le refroidissement provoque le blocage en place de la prothèse, le démontage s'effectuant grâce à 15 une ou des résistances électriques chauffantes noyées dans ladite matière. It consists of a medullary stem comprising one or more radially expandable elements that can be strongly pressed against the inner wall of the bone by the action of heat-fusible material injected under pressure and into an axial channel of the rod, and whose cooling causes the blocking in place of the prosthesis, the disassembly taking place by means of one or more electric heating resistances embedded in said material.

Sur les dessins annexés, donnés à titre d'exemple non limitatif d'une des formes de réalisation de l'objet de l'invention : In the accompanying drawings, given by way of non-limiting example of one of the embodiments of the subject of the invention:

20 La figure 1 représente en coupe axiale longitudinale un dispositif selon l'invention dont les éléments expansibles sont constitués de pistons, FIG. 1 is a longitudinal axial section of a device according to the invention, the expandable elements of which consist of pistons,

La figure 2 représente dans les mêmes conditions un dispositif selon l'invention dont l'élément expansible est constitué d'une poche externe, La figure 3 montre une variante du dispositif de la figure 1 dans laquelle les pistons sont équipés de patins longitudinaux, FIG. 2 shows, under the same conditions, a device according to the invention, the expandable element of which consists of an external pocket. FIG. 3 shows a variant of the device of FIG. 1 in which the pistons are equipped with longitudinal skids.

Les figures 4 à 6 sont des coupes transversales à une échelle différente, 30 respectivement suivant les flèches A-A de la figure 1, les flèches B-B de la figure 2 et les flèches C-C de la figure 3. Figures 4 to 6 are cross sections on a different scale, respectively along the arrows A-A of Figure 1, the arrows B-B of Figure 2 and the arrows C-C of Figure 3.

Le dispositif, figures 1 à 6, est constitué d'une tige médullaire 1 métallique pourvue d'un canal axial 2 débouchant à l'extrémité externe 3 de la 35 prothèse et communiquant avec une série de canaux radiaux 4 débouchant -2 25 2948557 -3 The device, FIGS. 1 to 6, consists of a medullary 1 metallic stem provided with an axial channel 2 opening out at the external end 3 of the prosthesis and communicating with a series of radial channels 4 opening out into the body. 3

5 soit dans des petits cylindres équipés de pistons 5 mobiles radialement, soit dans une poche souple 6 entourant la tige. La section de la tige médullaire 1 est sensiblement inférieure à la section interne de l'os 7 à équiper. 5 either in small cylinders equipped with pistons 5 movable radially, or in a flexible pouch 6 surrounding the rod. The section of the medullary stem 1 is substantially smaller than the internal section of the bone 7 to equip.

Les pistons 5 sont répartis le long de la tige 1 et orientés selon au moins trois directions de manière à pouvoir maintenir la prothèse en place sans risques de déplacements ultérieurs. Ils sont avantageusement équipés de patins longitudinaux antidérapants 8 permettant une meilleure répartition des forces sur la paroi de l'os 7. En effet, il arrive fréquemment que les os devant recevoir une prothèse soient fragiles. The pistons 5 are distributed along the rod 1 and oriented in at least three directions so as to maintain the prosthesis in place without risk of subsequent displacements. They are advantageously equipped with longitudinal anti-slip pads 8 allowing a better distribution of forces on the wall of the bone 7. Indeed, it often happens that the bones to receive a prosthesis are fragile.

Le système avec poche 6, illustré par les figures 2 et 5, permet d'obtenir un appui sur toute la surface interne de l'os 7, ainsi qu'un ajustement précis de la position de la prothèse par rapport à l'os avant solidification de la matière thermo-fusible. The system with pocket 6, illustrated in Figures 2 and 5, provides a support on the entire inner surface of the bone 7, and a precise adjustment of the position of the prosthesis relative to the front bone solidification of the thermo-fuse material.

Pour la mise en place, les pistons sont enfoncés dans leur cylindre, ou la poche plaquée contre la tige médullaire 1, puis cette dernière est introduite dans la cavité de l'os 7. Une matière thermo-fusible 9, préalablement chauffée, est alors injectée sous pression suivant la flèche 10 dans le canal axial 2, grâce à un appareillage connu, de manière à faire plaquer les pistons 5 ou la poche 6 contre la paroi interne de l'os. La pression est déterminée de manière à obtenir un maintien suffisant sans risquer de détériorer l'os. Pendant que la matière est liquide, la position de la prothèse peut être ajustée de façon très précise. For placement, the pistons are driven into their cylinder, or the pocket pressed against the medullary stem 1, and the latter is introduced into the cavity of the bone 7. A heat-fusible material 9, previously heated, is then injected under pressure along the arrow 10 in the axial channel 2, using a known apparatus, so as to press the pistons 5 or the pocket 6 against the inner wall of the bone. The pressure is determined so as to obtain sufficient support without risk of damaging the bone. While the material is liquid, the position of the prosthesis can be adjusted very precisely.

En se refroidissant, la matière thermo-fusible va ensuite se solidifier, rendant la prothèse parfaitement solidaire de l'os 7. While cooling, the thermo-fuse material will then solidify, making the prosthesis perfectly integral with the bone 7.

La matière thermo-fusible utilisée devra avoir une rigidité à froid suffisante pour assurer un bon maintien, mais pourra avantageusement 2948557 -4 The thermo-fuse material used must have a cold rigidity sufficient to ensure a good maintenance, but may advantageously 2948557 -4

5 présenter une certaine élasticité pouvant jouer un rôle, en particulier dans le cas de la poche souple6. 5 have a certain elasticity that can play a role, particularly in the case of the flexible pouch6.

Pour le démontage, un ou plusieurs filaments chauffants 11 isolés, aboutissant à des électrodes 12 situées à l'extrémité externe de la tige 10 médullaire 1, sont disposés à l'intérieur de la poche 6 ou du canal axial 2. En raccordant ces électrodes à une source de courant, les filaments chauffants vont liquéfier la matière thermo-fusible9, permettant ainsi le démontage de la prothèse. Ce dispositif peut être également utilisé pour faciliter la mise en place. For disassembly, one or more isolated heating filaments 11, leading to electrodes 12 at the outer end of the medullary rod 1, are arranged inside the pocket 6 or the axial channel 2. By connecting these electrodes at a current source, the heating filaments will liquefy the thermo-fusible material 9, thus allowing the dismantling of the prosthesis. This device can also be used to facilitate placement.

15 La tige médullaire 1 pourra éventuellement être pourvue d'un ou plusieurs canaux longitudinaux libres (non représentés), dans lesquels la moelle osseuse sera introduite pour permettre la nutrition de l'os. The medullary stem 1 may optionally be provided with one or more free longitudinal channels (not shown), in which the bone marrow will be introduced to allow nutrition of the bone.

Le positionnement des divers éléments constitutifs donne à l'objet de 20 l'invention un maximum d'effets utiles qui n'avaient pas été, à ce jour, obtenus par des dispositifs similaires. The positioning of the various constituent elements gives the object of the invention a maximum of useful effects which had not been obtained so far by similar devices.

On pourra avantageusement faire entrer le canal axial de la tige médullaire en 10 bis (figure 2) pour le rendre rectiligne et positionner les 25 électrodes en un point moins sollicité de la prothèse. The axial channel of the medullary rod can be advantageously inserted at 10 bis (FIG. 2) to make it rectilinear and to position the electrodes at a less stressed point of the prosthesis.

Claims (5)

Revendications10 1. Prothèse articulaire osseuse à tige médullaire ajustable, destinée à être utilisée en chirurgie orthopédique, en particulier dans le cadre des prothèses de la hanche, caractérisé par une tige médullaire (1) métallique comportant un ou plusieurs éléments expansibles radialement pouvant être appuyés fortement 15 contre la paroi interne de l'os (7) par l'action d'une matière thermo-fusible (9) injectée à chaud et sous pression dans un canal axial (2) de la tige médullaire (1) débouchant à l'extrémité externe (3) de cette dernière, et dont la solidification par refroidissement provoque le blocage en place de la prothèse, le démontage s'effectuant grâce à un ou plusieurs filaments 20 chauffants électriques (11), isolés, moyés dans ladite matière thermofusible, aboutissant à des électrodes (12) situées à l'extrémité externe (3) de ladite tige médullaire, et, permettant la liquéfaction de la matière thermofusible (9), ces filaments chauffants pouvant être également utilisés pour faciliter la mise en place de la prothèse. 25 1. A bone articular prosthesis with an adjustable medullary stem, intended to be used in orthopedic surgery, in particular in the context of hip prostheses, characterized by a metallic medullary stem (1) comprising one or more radially expandable elements that can be strongly supported. Against the inner wall of the bone (7) by the action of a heat-fusible material (9) injected under pressure and into an axial channel (2) of the medullary stem (1) opening to the external end (3) of the latter, and whose solidification by cooling causes the blocking in place of the prosthesis, disassembly being effected by means of one or more electric heating filaments (11), insulated, driven in said hot melt material, terminating at electrodes (12) at the outer end (3) of said medullary stem, and, permitting the liquefaction of the hot melt material (9), these filaments It can also be used to facilitate the placement of the prosthesis. 25 2. Dispositif suivant la revendication 1, se caractérisant par le fait que les éléments expansibles radialement sont constitués de pistons (5) mobiles radialement dans des cylindres raccordés au canal axial (2) par l'intermédiaire de canaux radiaux (4), lesdits pistons étant répartis le long de 30 la tige médullaire (1) et orientés selon au moins trois directions de manière à pouvoir maintenir la prothèse en place sans risques de déplacements ultérieurs. -5 2948557 -6 5 2. Device according to claim 1, characterized in that the radially expandable elements consist of pistons (5) radially movable in cylinders connected to the axial channel (2) via radial channels (4), said pistons being distributed along the medullary stem (1) and oriented in at least three directions so as to maintain the prosthesis in place without risk of subsequent movement. -5 2948557 -6 5 3. Dispositif suivant les revendications 1 et 2, se caractérisant par le fait que les pistons (5) sont équipés de patins longitudinaux antidérapants (8) permettant une bonne répartition des forces sur la paroi de l'os (7). 3. Device according to claims 1 and 2, characterized in that the pistons (5) are equipped with longitudinal anti-slip pads (8) for a good distribution of forces on the wall of the bone (7). 4. Dispositif suivant la revendication 1 , se caractérisant par le fait que l'élément expansible radialement est constitué d'une poche souple (6) entourant la tige médullaire (1) et raccordée au canal axial (2) par l'intermédiaire de canaux radiaux (4). 4. Device according to claim 1, characterized in that the radially expandable element consists of a flexible bag (6) surrounding the medullary stem (1) and connected to the axial channel (2) via channels radial (4). 5. Dispositif suivant l'une quelconque des revendications précédentes, se caractérisant par le fait que la tige médullaire (1) est pourvue d'un ou plusieurs canaux longitudinaux libres dans lesquels de la moelle osseuse est introduite pour permettre la nutrition de l'os. 5. Device according to any one of the preceding claims, characterized in that the medullary stem (1) is provided with one or more free longitudinal channels into which bone marrow is introduced to allow the nutrition of the bone. .
FR0903814A 2009-08-03 2009-08-03 Bone joint prosthesis for use in orthopedic hip surgery, has rod comprising elements supported against wall of bone, and filaments terminating with electrodes arranged at end of rod and permitting liquefaction of heat-sealable material Withdrawn FR2948557A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0903814A FR2948557A1 (en) 2009-08-03 2009-08-03 Bone joint prosthesis for use in orthopedic hip surgery, has rod comprising elements supported against wall of bone, and filaments terminating with electrodes arranged at end of rod and permitting liquefaction of heat-sealable material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0903814A FR2948557A1 (en) 2009-08-03 2009-08-03 Bone joint prosthesis for use in orthopedic hip surgery, has rod comprising elements supported against wall of bone, and filaments terminating with electrodes arranged at end of rod and permitting liquefaction of heat-sealable material

Publications (1)

Publication Number Publication Date
FR2948557A1 true FR2948557A1 (en) 2011-02-04

Family

ID=42166456

Family Applications (1)

Application Number Title Priority Date Filing Date
FR0903814A Withdrawn FR2948557A1 (en) 2009-08-03 2009-08-03 Bone joint prosthesis for use in orthopedic hip surgery, has rod comprising elements supported against wall of bone, and filaments terminating with electrodes arranged at end of rod and permitting liquefaction of heat-sealable material

Country Status (1)

Country Link
FR (1) FR2948557A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2398490A1 (en) * 1977-07-27 1979-02-23 Carbone Ag ANCHORING AN ENDOPROTHESIS IN OR ON A BONE
US5376123A (en) * 1989-12-07 1994-12-27 Ao-Forschungsinstitut Davos Adaptable stem for endoprosthesis
DE102005025384A1 (en) * 2005-05-31 2006-12-07 Wittenstein Ag Bone implant, for inserting in bones as artificial limbs, has actuator operated externally for altering implant's external shape
US20080167723A1 (en) * 2006-03-20 2008-07-10 Zimmer, Inc. Prosthetic hip implants

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2398490A1 (en) * 1977-07-27 1979-02-23 Carbone Ag ANCHORING AN ENDOPROTHESIS IN OR ON A BONE
US5376123A (en) * 1989-12-07 1994-12-27 Ao-Forschungsinstitut Davos Adaptable stem for endoprosthesis
DE102005025384A1 (en) * 2005-05-31 2006-12-07 Wittenstein Ag Bone implant, for inserting in bones as artificial limbs, has actuator operated externally for altering implant's external shape
US20080167723A1 (en) * 2006-03-20 2008-07-10 Zimmer, Inc. Prosthetic hip implants

Similar Documents

Publication Publication Date Title
CA2147645C (en) Knee support device or prosthesis
EP0792419B1 (en) Device for mutually moving two bodies
FR2900814A1 (en) Intervertebral cage implantation instrument for use by practitioner, has pusher that translates cage, and unit that guides cage during its displacement and with sleeve having inner section determined so that elementary cages are translated
EP1520560B1 (en) Humeral implant for a shoulder prosthesis
FR2832054A1 (en) POSTERIOR VERTEBRAL JOINT PROSTHESIS
EP2948079B1 (en) Self-extending implant
FR2595562A1 (en) PROSTHESIS CUP
WO2006120355A1 (en) Joint fusion apparatus for the ankle-type joint and arthrodetic pin for use in said apparatus
EP0422167A1 (en) Orthopedic apparatus for persons handicapped in one leg.
FR3019982A1 (en) VERTEBRAL OSTEOSYNTHESIS EQUIPMENT FOR REALIZING THE ILIAC ANCHORAGE OF A VERTEBRAL BAR
BE1011626A3 (en) A total knee prosthesis tibial plateau mobile rotating.
FR2660546A1 (en) Module for acetabular reconstruction
FR2948557A1 (en) Bone joint prosthesis for use in orthopedic hip surgery, has rod comprising elements supported against wall of bone, and filaments terminating with electrodes arranged at end of rod and permitting liquefaction of heat-sealable material
EP0716837A2 (en) Cavernous extension implant
CH645802A5 (en) Endoprosthetic bone joint device
FR2926976A1 (en) Dynamic stabilization element for connecting implantable spinal connection assemblies on vertebrae, has fixation sheath surrounding rod and with rigid zones spaced relative to each other at distance lower than nominal length of contact zone
EP3166521A1 (en) Implant and surgical kit for holding bone bodies of a patient in position with respect to one another
FR2793677A1 (en) Total knee prosthesis has femoral section with bone growth sleeve having length adjustment
FR2877833A1 (en) Prosthesis for correction of lordosis to improve the mobility of the spinal column, comprises titanium rigid plates, incompressible brace, biocompatible silicone intermediate and rigid emergences
FR2892014A1 (en) Cup for cotyloid implant of femoral prosthesis has threaded axial aperture to receive threaded projection on insert
FR2976176A1 (en) Total knee prosthesis, has femoral implant including two bent legs forming lower portion of prosthetic trochlea, where depth of trochlea is less than height of kneecap, and width of trochlea is greater than that of kneecap
FR2704424A1 (en) Cervical orthesis with adjustable cervico-occipital support
EP1512367A1 (en) Physiological speculum
EP1718251A1 (en) Intervertebral annulus prosthesis
FR2923154A1 (en) Prosthetic assembly for knee joint, has series of rods, where each rod has diaphyseal part fixed in centromedullary canal of radial bone, where length of intermediate part constituted of bearings is increased

Legal Events

Date Code Title Description
ST Notification of lapse

Effective date: 20110502