FR2618667A1 - Self-immobilising femoral rod for hip prosthesis - Google Patents

Self-immobilising femoral rod for hip prosthesis Download PDF

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Publication number
FR2618667A1
FR2618667A1 FR8711040A FR8711040A FR2618667A1 FR 2618667 A1 FR2618667 A1 FR 2618667A1 FR 8711040 A FR8711040 A FR 8711040A FR 8711040 A FR8711040 A FR 8711040A FR 2618667 A1 FR2618667 A1 FR 2618667A1
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FR
France
Prior art keywords
metaphyseal
self
femoral
femoral stem
torsion
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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
FR8711040A
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French (fr)
Inventor
Michel Dive
Michel Gau
Gerard De Matteis
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Individual
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Individual
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Filing date
Publication date
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Priority to FR8711040A priority Critical patent/FR2618667A1/en
Publication of FR2618667A1 publication Critical patent/FR2618667A1/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
    • A61F2/3662—Femoral shafts
    • A61F2/367—Proximal or metaphyseal parts of 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A61F2/3676—Distal or diaphyseal parts of 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30112—Rounded shapes, e.g. with rounded corners
    • A61F2002/30125—Rounded shapes, e.g. with rounded corners elliptical or oval
    • 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
    • A61F2002/3082—Grooves
    • 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
    • A61F2002/3698—Geometrical features twisted about the longitudinal axis of the shaft
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
    • A61F2230/0008—Rounded shapes, e.g. with rounded corners elliptical or oval

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

The subject of the invention relates to the generic technical sector of prostheses and in particular hip prostheses. The rod according to the invention is particularly noteworthy by the presence of a torsion in the metaphyseal part of the rod, contained between B-B1 and C-C1, which makes it possible spontaneously to obtain anteversion of the neck, cephalic portion contained between A-A1 and B-B1, thus reproducing the exact anatomy of the femur, ensuring optimal filling of the femoral cavity, resulting in multidirectional self-immobilisation of the rod in the medullary cavity of the femur. The invention applies to femoral rods of all types and sizes.

Description

L'invention s pour objet erre tige fémorale auto-bloquante pour pro- thés'.' nG hanch-.  The invention relates to the self-locking femoral stem for prostheses. nG hanch-.

L'objet de l'invention se rattache au domaine technique de prothè- ses en générai et plus précisément des prothèses de hanche. The object of the invention is related to the technical field of prostheses in general and more specifically to hip prostheses.

Les tiges fémorales sont bien connues, cflles-ci sont engagées dans le canal médullaire du fémur. The femoral stems are well known, which are involved in the medullary canal of the femur.

Actuellement, il existe des prothèses avec simple ou double courtu- res ne reproduisant pas l'anatomie normale diaphyso-métaphysaire du fût fémoral, par manque de torsion métaphysaire de la tige fémorale, ce qui entraîne donc un mauvais remplissage par la.prothèse du canal nédullaire, et par conséqucnt, induit des zones d'hyper et d'hypo-pressions, avec répartition non uniforme des pressions exercées sur cette tige, malgré l'emploi du ciment. Le risque de descellement des prothèses non cimentées de ce type est don plus grand encore, comparativement aux prothèses cimentées. Currently, there are prostheses with single or double courses that do not reproduce the normal diaphyso-metaphyseal anatomy of the femoral shaft, due to a lack of metaphyseal twisting of the femoral stem, which therefore leads to poor filling by the canal prosthesis. and therefore induces zones of hyper and hypopressure, with non-uniform distribution of the pressures exerted on this stem, in spite of the use of cement. The risk of loosening uncemented prostheses of this type is even greater, compared to cemented prostheses.

Pour pallier Ces inconvènients, la tige fémorale auto-loquante multi-directionnelle suivant l'invention est caractérisée en ce que sa particu haute, dite métaphysaire, présente une torsion anatomique que 1 l'on peut 2pp'-- ler simplement vrillage métaphysaire et fait que l'on obtient spontanément une antéversion du col et une courbure de compensation vraie. La tige s'intègre donc parfaitenent sur toutc Sa longueur dans la cavité nédul laire diaphyso-mé- taphysaire favorisant la répartition harmonieuse des forces et des pressions qui s'exercent sur elle, éliminant les risques de descellement. In order to overcome these drawbacks, the multi-directional self-loosening femoral stem according to the invention is characterized in that its high, so-called metaphyseal, particle has an anatomical torsion which can simply be twisted and metaphyseal spontaneous anteversion of the cervix and a true compensatory curvature are obtained. The stem thus integrates perfectly with its entire length in the diaphyso-metaphyseal nedulary cavity favoring the harmonious distribution of forces and the pressures exerted on it, eliminating the risks of loosening.

La zone métaphysaire de la tige présente une torsion et un vol une optimum métaphysaire pour un parfait remplissage de la cavité métaphysaire fé- morale. Les prothéses auto-bloquantes habituelles ne sont ato-bloquantes que dans un seul plan de l'espace : le plan frontal. Avec notre procédé, notre J:r < > - thèse devient auto-bloquante non seulement dans le plan frontal mai; également dans tous les plans de la torsion. Ce caractère auto-bloquant est majoré par le vrillage métaphysaire que nous donnons à cette tige. The metaphyseal zone of the stem presents a torsion and a metaphyseal optimum flight for a perfect filling of the metaphyseal cavity. The usual self-locking prostheses are ato-blocking only in one plane of space: the frontal plane. With our process, our thesis becomes self-locking not only in the May frontal plane; also in all the plans of the twist. This self-blocking character is enhanced by the metaphyseal twisting that we give to this stem.

L'invention sera mieux comprise à l'aide des explications et des figures l et 2. The invention will be better understood with the aid of the explanations and FIGS. 1 and 2.

La figure 1 est une vue de profil, montrant un exemple de réalisation de la tige fémorale, accompagnée de 5 coupes, permettant de mieux cerner l'objet de l'invention. Figure 1 is a side view, showing an embodiment of the femoral stem, with 5 sections, to better understand the object of the invention.

La figure 2 est une vue de face montrant un autre exemple de réalisation de la tige fémorale suivant l'invention. Figure 2 is a front view showing another embodiment of the femoral stem according to the invention.

Afin de rendre plus concret l'objet de I 'invention, on la décrit maintenant sous des formes non limitative:; de réalisation illustrées aux figure des dessins.  In order to make the object of the invention more concrete, it is now described in non-limiting forms: embodiment shown in the figures of the drawings.

La tig. fémorale présente ;rc manière connue une partie céphalique comprise entre A-Ai et B-Fl, une partie métaphysairi; comprise entre B-Bl et C-C ] et une partie diaphysaire comprise entre C-Cl et D-D1. The tig. femoral membrane, in known manner, a cephalic part comprised between A-Ai and B-Fl, a metaphyseal part; between B-Bl and C-C] and a diaphyseal portion between C-Cl and D-D1.

La tige fémorale proprement dite, dite tige auto-bloquante à remplissage métaphysaire optimum est originale par la torsion progressive métaphysaire qu'elle présente de 100 à 150. La torsion métaphysaire se fait dans l'espa- ce compris entre B-BI et C-Cl, elle est progressive, on la visualise mieux sur les coupes 1 à 5 de la figure 1. En effet, dans la partie diaphysaire, les coupes 1 et 2 montrent que l'axe frontal horizontal de la tige fémorale est en position 0o (F4) puis commence au niveau de la coupe 3.Le vrillage ou la torsion métaphysaire s'accentue sur la coupe 4 et se termine sur la coupe 5, avec un axe frontal horizontal de la métaphyse (F3) de 100 à 150, par rapport à l'axe frontal (F4) de la queue de la tige fémorale ou partie diaphysaire, om- prise entre C-C1 et D-D1. The femoral stem proper, called the auto-blocking stem with optimum metaphyseal filling, is original in that it has a metaphyseal progressive torsion of 100 to 150. The metaphyseal torsion is in the space between B-BI and C- Cl, it is progressive, it is visualized better on the cuts 1 to 5 of figure 1. Indeed, in the diaphyseal part, the sections 1 and 2 show that the horizontal frontal axis of the femoral stem is in position 0o ( F4) then begins at the level of section 3. The twisting or metaphyseal torsion is accentuated on section 4 and ends on section 5, with a horizontal frontal axis of the metaphysis (F3) of 100 to 150, relative to to the frontal axis (F4) of the tail of the femoral stem or diaphyseal part, omitted between C-C1 and D-D1.

La tige fémorale a donc un axe unique vertical (F1). Sur cet axe
Unique Fl, évolue l'axe frontal do la tige fémorale en deux parties différen- tes - dans la portion diaphysaire dans l'espace co:npris entre C-C1 et D-DI, l'axe frontal est de 0 (F4), - dans la portion métaphysaire dans l 'espace compris entre 13-B1 et C-CI, l'axe frontal présente une torsion progressive de 10 à 1', (F3). The femoral stem therefore has a single vertical axis (F1). On this axis
Unique Fl, evolves the frontal axis of the femoral stem into two different parts - in the diaphyseal portion in the space between C-C1 and D-DI, the frontal axis is 0 (F4), - in the metaphyseal portion in the space between 13-B1 and C-CI, the frontal axis has a progressive twist of 10 to 1 ', (F3).

Ce vrillage eorreopond à l'anatomie normale de la métaphyse fémorale où le remplissage optimum de la cavité métaphysaire, tout en donnant une antéversion secondaire de 10 à 15 , au col de la tige fémorale, partie céphalique comprise entre A-Al ct B-BI, par l'intermédiaire de ce vrillage métaphy- saire. L'axe frontal est visualisé par 13 flèche F3 représentée sur chaque coupe, l'axe frontal de 10 à 15 se retrouve en coupe 5, sur la partie haute de la métaphysaire en B-Bl.  This twisting eorreopond to the normal anatomy of the femoral metaphysis where the optimum filling of the metaphyseal cavity, while giving a secondary anteversion of 10 to 15, to the neck of the femoral stem, cephalic part between A-Al and B-BI through this metaphysical twisting. The frontal axis is visualized by 13 arrow F3 shown on each section, the frontal axis 10 to 15 is found in section 5, on the upper part of the metaphyseal B-B1.

Claims (4)

REVENDICATIONS 1) Tige fémorale auto-bloquante pour prothèse de hanche, caractérisée en ce que la portion métaphysaire, comprise entre B-Bi- et C-Cl, présente une torsion de façon à reproduire l'anatomie exacte du canal médullaire du fémur, assurant un remplissage optimum de ce dernier permettant un auto-bloca- ge multi-directionnel de cette tige dans l'os fémoral. 1) Self-locking femoral stem for hip prosthesis, characterized in that the metaphyseal portion, between B-Bi- and C-Cl, is twisted so as to reproduce the exact anatomy of the medullary canal of the femur, ensuring optimum filling of the latter allowing a multi-directional self-blocking of this rod in the femoral bone. 2) Tige fémorale auto-bloquante selon revendication 1, caractérisée en ce que la torsion est progressivedans la partie métaphysaire. 2) self-locking femoral stem according to claim 1, characterized in that the torsion is progressive in the metaphyseal part. 3) Tige fémorale selon revendication l, caractérisée en ce que la torsion commence au niveau C-C1, finit au niveau B-Bl, correspondant à la moitié suprieure de la tige fémorale. 3) Femoral stem according to claim 1, characterized in that the twist begins at C-C1, ends at B-B1, corresponding to the upper half of the femoral stem. 4) Tige fémorale selon la revendication 1, caractérisée en ce que la torsion métaphysaire comprise entre B-Bl et C-Cl est de 1(1 à 15 , soit égale à la torsion métaphysaire norrnale de l'anatomie du fémur.  4) femoral stem according to claim 1, characterized in that the metaphyseal torsion between B-B1 and C-C1 is 1 (1 to 15, equal to the normal metaphyseal torsion of the anatomy of the femur.
FR8711040A 1987-07-30 1987-07-30 Self-immobilising femoral rod for hip prosthesis Pending FR2618667A1 (en)

Priority Applications (1)

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FR8711040A FR2618667A1 (en) 1987-07-30 1987-07-30 Self-immobilising femoral rod for hip prosthesis

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2649313A1 (en) * 1989-07-10 1991-01-11 Biotecnic DEVICE FOR FACILITATING LAYOUT AND ALLOWING THE REMOVAL OF A HIP PROSTHESIS TAIL
WO1991018560A1 (en) * 1990-06-07 1991-12-12 Denis Godeau Hip prosthesis
FR2676914A1 (en) * 1991-05-28 1992-12-04 Tec Implant Sarl Anatomical femoral prosthesis
FR2678162A1 (en) * 1991-06-25 1992-12-31 Arcos Orthopedie Femoral component of a hip prosthesis, which is to be cemented
EP0528284A1 (en) * 1991-08-19 1993-02-24 Intraplant AG Hip joint prosthesis
FR2686789A1 (en) * 1992-01-31 1993-08-06 Corum Ste Civile Hip prosthesis femoral stem
WO1994008534A1 (en) * 1992-10-12 1994-04-28 Klaus Draenert Pin of a femur component of a hip-joint endoprosthesis
EP0622061A1 (en) * 1993-04-29 1994-11-02 Howmedica Inc. Femoral component for a hip prothesis
FR2720931A1 (en) * 1994-06-08 1995-12-15 Chavane Herve Femoral shank for hip prosthesis
EP0695540A1 (en) * 1994-08-02 1996-02-07 Merck Biomaterial France Hip prothesis
FR2723530A1 (en) * 1994-08-12 1996-02-16 Advanced Technical Fabrication Prosthesis joining hip joint and medullary canal of femur
WO1996004868A1 (en) * 1994-08-12 1996-02-22 Advanced Technical Fabrication Hip prosthesis
US5888210A (en) * 1992-10-12 1999-03-30 Draenert; Klaus Stem of a femoral component of a hip joint endoprosthesis

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3247726A1 (en) * 1982-12-23 1984-06-28 Orthoplant Vertriebs-GmbH, 2800 Bremen Total endoprosthesis for a hip joint

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3247726A1 (en) * 1982-12-23 1984-06-28 Orthoplant Vertriebs-GmbH, 2800 Bremen Total endoprosthesis for a hip joint

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0408109A1 (en) * 1989-07-10 1991-01-16 Biotecnic Societe Anonyme Device to assist the implantation, and allow the removel of, a hip prosthesis shaft
FR2649313A1 (en) * 1989-07-10 1991-01-11 Biotecnic DEVICE FOR FACILITATING LAYOUT AND ALLOWING THE REMOVAL OF A HIP PROSTHESIS TAIL
WO1991018560A1 (en) * 1990-06-07 1991-12-12 Denis Godeau Hip prosthesis
FR2662932A1 (en) * 1990-06-07 1991-12-13 Godeau Denis Femoral prosthesis
FR2676914A1 (en) * 1991-05-28 1992-12-04 Tec Implant Sarl Anatomical femoral prosthesis
FR2678162A1 (en) * 1991-06-25 1992-12-31 Arcos Orthopedie Femoral component of a hip prosthesis, which is to be cemented
CH687583A5 (en) * 1991-08-19 1997-01-15 Intraplant Ag Hueftgelenksprothese.
EP0528284A1 (en) * 1991-08-19 1993-02-24 Intraplant AG Hip joint prosthesis
FR2686789A1 (en) * 1992-01-31 1993-08-06 Corum Ste Civile Hip prosthesis femoral stem
WO1994008534A1 (en) * 1992-10-12 1994-04-28 Klaus Draenert Pin of a femur component of a hip-joint endoprosthesis
US5888210A (en) * 1992-10-12 1999-03-30 Draenert; Klaus Stem of a femoral component of a hip joint endoprosthesis
EP0622061A1 (en) * 1993-04-29 1994-11-02 Howmedica Inc. Femoral component for a hip prothesis
FR2720931A1 (en) * 1994-06-08 1995-12-15 Chavane Herve Femoral shank for hip prosthesis
EP0695540A1 (en) * 1994-08-02 1996-02-07 Merck Biomaterial France Hip prothesis
FR2723308A1 (en) * 1994-08-02 1996-02-09 Impact ADVANCED HIP PROSTHESIS
FR2723530A1 (en) * 1994-08-12 1996-02-16 Advanced Technical Fabrication Prosthesis joining hip joint and medullary canal of femur
WO1996004868A1 (en) * 1994-08-12 1996-02-22 Advanced Technical Fabrication Hip prosthesis
AU684219B2 (en) * 1994-08-12 1997-12-04 Advanced Technical Fabrication Hip prosthesis
US6030417A (en) * 1994-08-12 2000-02-29 Advanced Technical Fabrication Hip prosthesis

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