FR2703904A1 - Trapezo-metacarpal prosthesis. - Google Patents

Trapezo-metacarpal prosthesis. Download PDF

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Publication number
FR2703904A1
FR2703904A1 FR9304657A FR9304657A FR2703904A1 FR 2703904 A1 FR2703904 A1 FR 2703904A1 FR 9304657 A FR9304657 A FR 9304657A FR 9304657 A FR9304657 A FR 9304657A FR 2703904 A1 FR2703904 A1 FR 2703904A1
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France
Prior art keywords
cup
cavity
prosthesis according
bone
insert
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Granted
Application number
FR9304657A
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French (fr)
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FR2703904B1 (en
Inventor
Dupuy Jean-Francois
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Tornier SAS
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Tornier SAS
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Priority to FR9304657A priority Critical patent/FR2703904B1/en
Priority to DE4412721A priority patent/DE4412721A1/en
Publication of FR2703904A1 publication Critical patent/FR2703904A1/en
Application granted granted Critical
Publication of FR2703904B1 publication Critical patent/FR2703904B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
    • A61F2/4241—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for hands, e.g. fingers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30138—Convex polygonal shapes
    • A61F2002/30156—Convex polygonal shapes triangular
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30332—Conically- or frustoconically-shaped protrusion and recess
    • 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
    • A61F2002/30537—Special structural features of bone or joint prostheses not otherwise provided for adjustable
    • A61F2002/30538—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting angular orientation
    • A61F2002/3054—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting angular orientation about a connection axis or implantation axis for selecting any one of a plurality of radial orientations between two modular parts, e.g. Morse taper connections, at discrete positions, angular positions or continuous positions
    • 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
    • A61F2002/30621—Features concerning the anatomical functioning or articulation of the prosthetic joint
    • A61F2002/30649—Ball-and-socket joints
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30904—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves serrated profile, i.e. saw-toothed
    • 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
    • A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
    • A61F2/4241—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for hands, e.g. fingers
    • A61F2002/4256—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for hands, e.g. fingers for carpo-metacarpal joints, i.e. CMC joints
    • A61F2002/4258—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for hands, e.g. fingers for carpo-metacarpal joints, i.e. CMC joints for trapezo-metacarpal joints of thumbs
    • 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
    • A61F2230/0023—Angular shapes triangular

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

Elle comprend en combinaison: - une cupule (2) de faibles dimensions qui est fixée en appui contre l'os scaphoïde (4) et immobilisée par l'intermédiaire d'une vis (3); - un insert (5) en matière plastique qui est introduit dans la cupule (2) et qui comporte dans sa partie interne une cavité sphérique (50); - et une tige d'ancrage (6) à profil triangulaire dont l'une de ses extrémités libre comporte une tête sphérique (61) qui coopère avec la cavité (50) de l'insert (5).It comprises in combination: - a small cup (2) which is fixed in abutment against the scaphoid bone (4) and immobilized by means of a screw (3); - an insert (5) of plastic material which is introduced into the cup (2) and which has in its internal part a spherical cavity (50); - And an anchoring rod (6) with a triangular profile, one of its free ends has a spherical head (61) which cooperates with the cavity (50) of the insert (5).

Description

La présente invention a trait à une prothèse totale du pouce et plusThe present invention relates to a total thumb prosthesis and more

particulièrement de l'articulation trapézo-métacarpienne afin de rétablir la force et la mobilité de l'articulation anatomique qui est  particularly the trapeziometacarpal joint to restore the strength and mobility of the anatomical joint that is

endommagée par un processus pathologique dégénératif ou inflammatoire.  damaged by a degenerative or inflammatory pathological process.

On connaît des prothèses de ce genre qui comportent plus générale-  Prostheses of this kind are known which include more general-

ment un bloc de matériau élastique réalisé par exemple dans une matière dénommée "silastic" Ces prothèses sont sujettes à une usure rapide, tandis que leur conception primaire tient peu compte des impératifs de rigidité et de stabilité nécessaires pour rétablir une fonction adéquate  a block of elastic material made for example in a material called "silastic" These prostheses are subject to rapid wear, while their primary design takes little account of the requirements of rigidity and stability necessary to restore an adequate function

et durable du pouce.and durable thumb.

En outre, il existe d'autres prothèses qui sont conçues sur le principe d'une articulation mécanique à tête sphérique bénificiant de résultats cliniques satisfaisants sur le plan de la restauration de l'articulation Cependant, ces prothèses sont prévues pour être ancrées dans une cavité ménagée dans l'os trapézoïdal du pouce Cet os est de petite taille et souvent d'une mauvaise qualité entraînant dans la plus part des cas un descellement de l'ancrage de la prothèse et une perte  In addition, there are other prostheses which are designed on the principle of a mechanical articulation with spherical head blessing satisfactory clinical results in terms of restoration of the joint However, these prostheses are intended to be anchored in a cavity This bone is small and often of poor quality, resulting in most cases in loosening of the anchorage of the prosthesis and a loss

importante des fonctions de mobilité.  important mobility functions.

C'est à ces inconvénients qu'entend plus spécialement remédier la  It is these drawbacks that are more particularly

présente invention.present invention.

La prothèse totale pour l'articulation trapézo-métacarpienne suivant la présente invention a pour but de remplacer totalement l'os  The total prosthesis for the trapezio-metacarpal joint according to the present invention aims to completely replace the bone

trapézoïdal dans sa forme et dans son volume par une calotte métallique.  trapezoidal in its shape and in its volume by a metal cap.

La prothèse totale suivant l'invention comprend: une cupule de faible dimension qui est immobilisée contre  The total prosthesis according to the invention comprises: a small cup which is immobilized against

l'os scaphoide du carpe par l'intermédiaire d'une vis de serrage.  the scaphol bone of the carp by means of a screw of tightening.

un insert en matière plastique qui est introduit dans la  a plastic insert that is introduced into the

cupule et qui comprend dans sa partie interne une cavité sphérique.  cupule and which comprises in its internal part a spherical cavity.

et une tige d'ancrage qui présente un profil extérieur tri-  and an anchor rod which has an outer profile tri-

angulaire et dont l'une des extrémités libres est pourvue d'une tête  angular and one of whose free ends is provided with a head

sphérique qui coopère avec la cavité de l'insert.  spherical which cooperates with the cavity of the insert.

Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer:  The accompanying drawing, given by way of example, will provide a better understanding of the invention, the characteristics it has and the advantages it is likely to provide:

Fig I est une vue représentant une main droite dont l'arti-  Fig I is a view showing a right hand whose

culation du pouce est remplacée par une prothèse totale trapézo-métacar-  the thumb is replaced by a trapezo-metacarent total prosthesis.

pienne suivant l'invention.according to the invention.

Fig 2 est une vue en perspective éclatée illustrant les dif-  Fig 2 is an exploded perspective view illustrating the various

férents éléments composant la prothèse totale trapézo-métacarpienne.  fent elements composing the total trapezio-metacarpal prosthesis.

Fig 3 est une vue agrandie montrant en détail l'articulation  Fig 3 is an enlarged view showing in detail the articulation

de la prothèse totale.of the total prosthesis.

On a représenté en fig 1 le squelette d'une main droite dont l'ar-  FIG. 1 shows the skeleton of a right hand whose

ticulation du pouce et plus particulièrement l'articulation trapézo-  thumb jointing and more particularly the trapezoid joint

métacarpienne a été remplacée par une prothèse totale 1 suivant la pré-  metacarpal was replaced by a total prosthesis 1 according to the

sente invention.this invention.

La prothèse totale trapézo-métacarpienne 1 comporte quatre éléments  The trapeziometacarpal total prosthesis 1 has four elements

distincts 2, 3, 5 et 6, qui permettent, par leur combinaison, de repro-  2, 3, 5 and 6, which by their combination make it possible to reproduce

duire parfaitement l'articulation du pouce En effet, la prothèse I com-  perfectly fit the thumb joint In fact, the prosthesis I com-

porte une cupule 2 qui est fixée à l'aide d'une vis 3 dans l'os scaphoi-  carries a cup 2 which is fixed with a screw 3 in the scaphoid bone.

de 4 A l'intérieur de cette cupule 2 vient s'encliqueter un insert 5 en  of 4 Inside this cup 2 is snapped an insert 5 in

matière plastique qui permet de réaliser la liaison avec une tige d'an-  plastic material which makes it possible to make the connection with a rod of

crage 6 qui est introduite dans la diaphyse du premier os métacarpien 7.  6 which is introduced into the diaphysis of the first metacarpal bone 7.

On a représenté en fig 2 et 3 la prothèse totale 1 et plus parti-  FIGS. 2 and 3 show the total prosthesis 1 and more particularly

culièrement chacun des éléments qui la composent La cupule 2 présente une forme extérieure cylindrique dont le volume est équivalent à celui de l'os trapézoïdal qu'elle remplace intégralement La cupule 2 est réalisée en une matière métallique, tandis que sa face externe comporte un plat incliné 20 qui est prévu pour s'adapter à la surface de l'os  The cup 2 has a cylindrical external shape whose volume is equivalent to that of the trapezoidal bone which it completely replaces. The cup 2 is made of a metallic material, while its external face comprises a dish. inclined 20 which is intended to fit the surface of the bone

trapézoïdal voisin 8, comme représenté en fig 3.  trapezoidal neighbor 8, as shown in FIG.

La cupule 2 est percée en son milieu d'un alésage débouchant 21 pour le passage de la vis 3 afin d'immobiliser ladite cupule sur l'os scaphoide 4 L'alésage 21 présente dans sa partie inférieure un profil sphérique correspondant à celui de la tête 31 de la vis 3 afin que cette dernière puisse pivoter angulairement autour de l'axe principal de la  The cup 2 is pierced in the middle of a bore opening 21 for the passage of the screw 3 to immobilize said cup on the scaphoide bone 4 The bore 21 has in its lower part a spherical profile corresponding to that of the head 31 of the screw 3 so that the latter can pivot angularly around the main axis of the

cupule 2 L'alésage 21 débouche co-axialement dans une cavité 22 à pro-  cup 2 The bore 21 opens co-axially in a cavity 22 to pro-

fil biconique.biconical wire.

La face inférieure extérieure 23 de la cupule 2, c'est-à-dire celle  The outer lower face 23 of the cup 2, that is to say the

se trouvant en appui contre l'os scaphoide 4 présente une surface mole-  resting against scapholide bone 4 has a molten surface

tée de manière à améliorer l'ancrage de ladite cupule sur cet os La face supérieure annulaire de la cupule 2 se trouvant à l'opposé de la  in order to improve the anchoring of said cup on this bone The annular upper surface of the cup 2 being opposite the

face 23 comporte des ergots 24 régulièrement répartis sur son pourtour.  face 23 has lugs 24 regularly distributed around its periphery.

L'insert 5 est réalisé dans une matière telle que le polyéthylène  The insert 5 is made of a material such as polyethylene

ou analogue, de manière à offrir de bonnes caractéristiques de frotte-  or similar, so as to offer good friction characteristics.

ment L'insert 5 comporte en son milieu une cavité sphérique 50, tandis que son pourtour extérieur 51 présente un profil tronconique propre à venir s'emboîter exactement dans la cavité 22 de la cupule 2 L'insert 5 comporte sur sa périphérie, et plus particulièrement au niveau de la  The insert 5 comprises at its center a spherical cavity 50, while its outer periphery 51 has a frustoconical profile adapted to fit exactly in the cavity 22 of the cup 2 The insert 5 has on its periphery, and more especially at the level of

cavité 50, une collerette 52 qui est pourvue d'un certain nombre d'enco-  cavity 50, a flange 52 which is provided with a certain number of

ches 53 Ces encoches 53 coopèrent avec les ergots 24 de manière à rete-  These notches 53 cooperate with the lugs 24 so as to retain

nir angulairement l'insert 5 à l'intérieur de la cupule 2.  angle angularly the insert 5 inside the cup 2.

La tige d'ancrage 6 présente une forme allongée et de section tri-  The anchor rod 6 has an elongated shape and of tri-section

angulaire de manière à s'adapter à la forme interne du premier os métacapien 7 La tige d'ancrage 6 est réalisée en une matière métallique de manière que ses faces soient d'un aspect rugueux pour permettre sa  angular so as to adapt to the internal shape of the first metacapien bone 7 The anchoring rod 6 is made of a metallic material so that its faces are of a rough appearance to allow its

mise en place avec ou sans ciment à l'intérieur de la diaphyse du pre-  placement with or without cement inside the diaphysis of the first

mier os métacarpien 7 L'une des extrémités libres de la tige d'ancrage 6 comporte une surface de raccordement conique 60 qui est prolongée par une tête sphérique 61 La tête sphérique 61 est introduite et retenue dans la cavité 50 de l'insert 5 de manière qu'elle puisse venir pivoter librement à l'intérieur de celle-ci Le retrait de la tête sphérique 61 de la cavité 50 est réalisé par l'intermédiaire d'un effort de traction  One of the free ends of the anchor rod 6 has a conical connecting surface 60 which is extended by a spherical head 61. The spherical head 61 is inserted and retained in the cavity 50 of the insert 5 of the invention. so that it can rotate freely inside thereof The withdrawal of the spherical head 61 of the cavity 50 is formed by means of a traction force

suivant son axe principal, ce qui évite toute luxation de l'articula-  along its main axis, which prevents dislocation of the articula-

tion. La vis 3 qui permet la fixation de la cupule 2 sur l'os scapho de 4 est d'aspect standard bien connu dont le filetage 30 est prévu pour un accrochage efficace dans le tissu osseux La vis 3 a pour fonction de maintenir fortement la cupule 2 au contact de l'os scaphoide 4 afin de  tion. The screw 3 which makes it possible to fix the cup 2 on the scapho bone of 4 is of well-known standard appearance, the threading 30 of which is provided for effective attachment to the bone tissue. The purpose of the screw 3 is to hold the cup tightly. 2 in contact with the scaphoide bone 4 in order to

constituer et de remplacer l'articulation du pouce.  build and replace the thumb joint.

On note que la surface articulaire du premier os métacarpien 7 a subi une résection pour permettre la mise en place de la tige d'ancrage  It is noted that the articular surface of the first metacarpal bone 7 has been resected to allow the establishment of the anchor rod

6 dans la diaphyse de ce dernier.6 in the diaphysis of the latter.

De plus, la mise en place de la prothèse totale trapézo-métacar-  In addition, placement of the trapezio-metacarent total prosthesis

pienne 1 nécessite l'ablation totale de l'os trapézoïdal, de sorte qu'il  1 requires the total ablation of the trapezoidal bone, so that

est remplacé par la cupule 2 Cette dernière est fixée contre l'os sca-  is replaced by the cup 2 The latter is fixed against the bone sca

phojde 4, de sorte que son plat incliné 20 se trouve en contact contre  phojde 4, so that its inclined dish 20 is in contact against

l'os trapézoidal 8 voisin.the 8 trapezoidal bone next door.

Une telle prothèse totale du pouce permet de préserver les trois degrés de liberté en rotation dans l'espace qui sont centrés par rapport à la tête sphérique 61 de la tige d'ancrage 6 La prothèse 1 étant  Such a total prosthesis of the thumb makes it possible to preserve the three degrees of freedom in rotation in space which are centered with respect to the spherical head 61 of the anchoring rod 6. The prosthesis 1 being

maintenue axialement par les structures musculo-tendineuses et capsulo-  maintained axially by the musculotendinous and capsule structures

ligamentaires restant en place.ligaments remaining in place.

Il doit d'ailleurs être entendu que la description qui précède n'a  It must, moreover, be understood that the foregoing description

été donnée qu'à titre d'exemple et qu'elle ne limite nullement le domai-  given as an example and that it does not limit the

ne de l'invention dont on ne sortirait pas en remplaçant les détails  not of the invention of which one would not go out by replacing the details

d'exécution décrits par tous autres équivalents.  described by any other equivalent.

Claims (7)

REVENDICATIONS R EV E N D I C A T I O N SCLAIMS R EV E N D I C A T IO N S 1 Prothèse totale du pouce et plus particulièrement de l'articula-  1 Total prosthesis of the thumb and more particularly of the articula- tion trapézoidale métacarpienne, caractérisée en ce qu'elle comprend: une cupule ( 2) de faibles dimensions qui est fixée en aopui contre l'os scaphoide ( 4) et immobilisée par l'intermédiaire d'une vis ( 3); un insert ( 5) en matière plastique qui est introduit dans la cupule ( 2) et qui comporte dans sa partie interne une cavité sphérique  trapezoidal metacarpal arrangement, characterized in that it comprises: a cup (2) of small dimensions which is fixed in aopui against scaphoide bone (4) and immobilized by means of a screw (3); an insert (5) of plastic material which is introduced into the cup (2) and which has in its internal part a spherical cavity ( 50);(50); et une tige d'ancrage ( 6) à profil triangulaire dont l'une de ses extrémité libre comporte une tête sphérique ( 61) qui coopère avec la  and an anchor rod (6) with a triangular profile, one of its free end comprises a spherical head (61) which cooperates with the cavité ( 50) de l'insert ( 5).cavity (50) of the insert (5). 2 Prothèse suivant la revendication 1, caractérisée en ce que la cupule ( 2) comporte un alésage ( 21) débouchant à profil sphérique dont  2 prosthesis according to claim 1, characterized in that the cup (2) comprises a bore (21) opening with a spherical profile which la partie supérieure débouche dans une cavité ( 22) à profil biconique.  the upper part opens into a cavity (22) biconical profile. 3 Prothèse suivant la revendication 1, caractérisée en ce que la cupule ( 2) qui présente un profil extérieur cylindrique comporte un plat incliné ( 20) en appui contre l'os trapézoidal voisin ( 8) lors de la  3 prosthesis according to claim 1, characterized in that the cup (2) which has a cylindrical outer profile comprises an inclined plate (20) bearing against the adjacent trapezoidal bone (8) during the fixation de ladite prothèse ( 1).fixing said prosthesis (1). 4 Prothèse suivant la revendication 1, caractérisée en ce que la cupule ( 2) comporte une face inférieure ( 23) moletée pour améliorer son  4 prosthesis according to claim 1, characterized in that the cup (2) has a lower surface (23) knurled to improve its ancrage dans l'os scaphoide ( 4).anchorage in scaphoide bone (4). Prothèse suivant la revendication 1, caractérisée en ce que la cupule ( 2) comporte sur sa face supérieure se trouvant à l'opposé de la  Prosthesis according to claim 1, characterized in that the cup (2) has on its upper face lying opposite the face ( 23) des ergots ( 24).face (23) of the lugs (24). 6 Prothèse suivant la revendication 1, caractérisée en ce que les ergots ( 24) sont régulièrement répartis sur le pourtour de la cupule ( 2). 7 Prothèse suivant la revendication 1, caractérisée en ce que l'insert ( 5) comporte une cavité ( 50) qui est bordée par une collerette ( 52) pourvue d'encoches ( 53) régulièrement espacées, tandis que son profil extérieur ( 51) présente une forme conique correspondant à celle  6 prosthesis according to claim 1, characterized in that the lugs (24) are regularly distributed around the perimeter of the cup (2). 7 prosthesis according to claim 1, characterized in that the insert (5) comprises a cavity (50) which is bordered by a flange (52) provided with notches (53) regularly spaced, while its outer profile (51). has a conical shape corresponding to that de la cavité ( 22) de la cupule ( 2).  of the cavity (22) of the cup (2). 8 Prothèse suivant la revendication 1, caractérisée en ce que la tige d'ancrage ( 6) est de forme triangulaire dont chacune des faces présente un aspect rugueux pour améliorer son ancrage dans la diaphyse  8 prosthesis according to claim 1, characterized in that the anchoring rod (6) is triangular in shape, each face has a rough appearance to improve its anchoring in the diaphysis du premier os métacarpien ( 7).of the first metacarpal bone (7). 9 Prothèse suivant La revendication 1, caractérisée en ce que La tige d'ancrage ( 6) est solidaire à L'une de ses extrémités Libres d'une tête sphérique ( 61) qui est introduite et retenue à l'intérieur de la  9 prosthesis according to claim 1, characterized in that the anchoring rod (6) is integral with one of its free ends with a spherical head (61) which is inserted and retained inside the cavité ( 50) de l'insert ( 5).cavity (50) of the insert (5).
FR9304657A 1993-04-15 1993-04-15 Trapezo-metacarpal prosthesis. Expired - Fee Related FR2703904B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR9304657A FR2703904B1 (en) 1993-04-15 1993-04-15 Trapezo-metacarpal prosthesis.
DE4412721A DE4412721A1 (en) 1993-04-15 1994-04-13 Carpometacarpal prosthesis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9304657A FR2703904B1 (en) 1993-04-15 1993-04-15 Trapezo-metacarpal prosthesis.

Publications (2)

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FR2703904A1 true FR2703904A1 (en) 1994-10-21
FR2703904B1 FR2703904B1 (en) 1995-06-09

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FR2770770A1 (en) * 1997-11-07 1999-05-14 Fixano Trapezo-metacarpal articulation prostheses
US7780737B2 (en) 2004-08-09 2010-08-24 Ortho Id Ball-type triple-joint implant system for upper or lower limbs

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US5645605A (en) * 1995-09-18 1997-07-08 Ascension Orthopedics, Inc. Implant device to replace the carpometacarpal joint of the human thumb
EP1195150A1 (en) * 2000-09-22 2002-04-10 Ceramtec AG Innovative Ceramic Engineering Finger joint implant
EP1627615A3 (en) * 2004-08-18 2006-11-02 Arthrex, Inc. Modular joint replacement implant with hydrogel surface
ATE432676T1 (en) 2004-09-08 2009-06-15 Arthrex Inc MODULAR JOINT PROSTHESIS
US7976580B2 (en) * 2005-08-18 2011-07-12 Mayo Foundation For Medical Education And Research Semi-constrained 1st carpometacarpal implant arthroplasty and method
FR2912899B1 (en) * 2007-02-28 2010-02-19 Small Bone Innovations Interna TRAPEZO-METACARPIAN JOINT PROSTHESIS
SE533438C2 (en) * 2008-05-06 2010-09-28 Swemac Innovation Ab Joint prosthesis

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GB2049435A (en) * 1979-05-25 1980-12-31 Laure Prosthetics Carpometacarpal thumb joint
US4642122A (en) * 1986-04-02 1987-02-10 Laure Prosthetics, Inc. Toe implant
EP0313762A1 (en) * 1987-10-28 1989-05-03 GebràœDer Sulzer Aktiengesellschaft Two-piece acetabular cup
US4955916A (en) * 1989-05-01 1990-09-11 Techmedica, Inc. Thumb joint prosthesis
FR2670109A1 (en) * 1990-10-15 1992-06-12 Lacaffiniere Jean Yves De Total trapeziometacarpal prosthesis with intermediate component
EP0524874A1 (en) * 1991-07-24 1993-01-27 Hades Joint prosthesis, especially trapezoid-metacarpal and digital joint

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DE2324865A1 (en) * 1973-05-17 1974-11-21 Friedrichsfeld Gmbh THIGH PROSTHESIS FOR HIP JOINT REPLACEMENT
GB2049435A (en) * 1979-05-25 1980-12-31 Laure Prosthetics Carpometacarpal thumb joint
US4642122A (en) * 1986-04-02 1987-02-10 Laure Prosthetics, Inc. Toe implant
EP0313762A1 (en) * 1987-10-28 1989-05-03 GebràœDer Sulzer Aktiengesellschaft Two-piece acetabular cup
US4955916A (en) * 1989-05-01 1990-09-11 Techmedica, Inc. Thumb joint prosthesis
FR2670109A1 (en) * 1990-10-15 1992-06-12 Lacaffiniere Jean Yves De Total trapeziometacarpal prosthesis with intermediate component
EP0524874A1 (en) * 1991-07-24 1993-01-27 Hades Joint prosthesis, especially trapezoid-metacarpal and digital joint

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2770770A1 (en) * 1997-11-07 1999-05-14 Fixano Trapezo-metacarpal articulation prostheses
US7780737B2 (en) 2004-08-09 2010-08-24 Ortho Id Ball-type triple-joint implant system for upper or lower limbs

Also Published As

Publication number Publication date
DE4412721A1 (en) 1994-10-20
FR2703904B1 (en) 1995-06-09

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