FR2637493A1 - Fixation shaft for a ball of a hip prosthesis - Google Patents
Fixation shaft for a ball of a hip prosthesis Download PDFInfo
- Publication number
- FR2637493A1 FR2637493A1 FR8813257A FR8813257A FR2637493A1 FR 2637493 A1 FR2637493 A1 FR 2637493A1 FR 8813257 A FR8813257 A FR 8813257A FR 8813257 A FR8813257 A FR 8813257A FR 2637493 A1 FR2637493 A1 FR 2637493A1
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- Prior art keywords
- tail
- parts
- fixing
- axis
- defining
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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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30108—Shapes
- A61F2002/3011—Cross-sections or two-dimensional shapes
- A61F2002/30112—Rounded shapes, e.g. with rounded corners
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30108—Shapes
- A61F2002/3011—Cross-sections or two-dimensional shapes
- A61F2002/30138—Convex polygonal shapes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30108—Shapes
- A61F2002/3011—Cross-sections or two-dimensional shapes
- A61F2002/30182—Other shapes
- A61F2002/30187—D-shaped or half-disc-shaped
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- 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
- A61F2/30767—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
- A61F2002/30827—Plurality of grooves
- A61F2002/30828—Plurality of grooves parallel
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
- A61F2002/3625—Necks
- A61F2002/3631—Necks with an integral complete or partial peripheral collar or bearing shoulder at its base
-
- 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
- A61F2002/4631—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor the prosthesis being specially adapted for being cemented
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0004—Rounded shapes, e.g. with rounded corners
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0017—Angular shapes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0028—Shapes in the form of latin or greek characters
- A61F2230/0034—D-shaped
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
Description
Patte de fixation pour une rotule de prothèse de hanche
La présente invention concerne les pattes de fixation pour les rotules de prothèses du type fémoral, c'est-à-dire pour la partie mâle de ces rotules.Mounting bracket for a hip prosthesis ball joint
The present invention relates to the fixing lugs for the ball joints of prostheses of the femoral type, that is to say for the male part of these ball joints.
Il est déJà connu un certain nombre de realisations de pattes de fixation pour soutenir la partie mâle d'une rotule de prothèse du type fémoral, c'est-à-dire de pattes destinées à etre disposées par enfichage dans le canal médulaire du fémur. Les réalisations actuelles de ces pattes comportent une queue terminée par une tête de fixation sur laquelle est généralement disposée, par un emboîtement: du type conique, la partie mtfe d'une rotule essentiellement constituée d'une portion de sphère. Les problèmes qui se posent pour la fixation d'une telle patte dans un fémur sont la solidité et la durée de la fixation car il est bien évident que l'on ne peut pas intervenir souvent pour la consolider, mais aussi le positionnement parfait de la patte dans
I'os.It is already known a certain number of embodiments of fixing lugs for supporting the male part of a prosthetic ball joint of the femoral type, that is to say of legs intended to be arranged by insertion in the medular canal of the femur. The current embodiments of these legs include a tail terminated by a fixing head on which is generally disposed, by an interlocking: of the conical type, the mtfe part of a ball joint essentially consisting of a portion of a sphere. The problems which arise for the fixation of such a leg in a femur are the solidity and the duration of the fixation because it is obvious that one cannot often intervene to consolidate it, but also the perfect positioning of the paw in
I'os.
La présente invention a pour but de réaliser une patte de fixation pour une rotule de prothèse du type fémoral, apte à être aisément enfichée dans le canal médulaire d'un os long, d'une structure lui assurant une coopération rigide avec le fémur et une fixation fiable pendant un temps relativement long. The object of the present invention is to produce a fixing lug for a prosthetic knee joint of the femoral type, capable of being easily inserted into the medular canal of a long bone, of a structure ensuring it rigid cooperation with the femur and a reliable fixing for a relatively long time.
Plus précisément, la présente invention a pour objet une patte de fixation pour une rotule de prothèse fémorale apte à être fixée dans le canal médulaire d'un fémur, caractérisée par le fait qu'elle comporte au moins une queue et une tête de fixation solidaire d'une extrémité de ladite queue, la tête de fixation étant apte à coopérer avec la partie m le de la rotule et définissant un axe de fixation, ladite queue comportant deux première et deuxième parties consécutives, ladite première partie étant limitée par un côté intérieur sensiblement concave et par un caté extérieur sensiblement convexe en pan coupé et ladite deuxième partie étant sensiblement rectiligne et définissant un axe de direction d'introduction dans ledit canal médulaire, ladite tête de fixation comportant une embase solidaire de la première extrémité de la première partie opposée à la seconde extrémité correspondant à la section de jonction de la première partie avec la deuxième partie, la section de l'embase étant supérieure à celle de la première extrémité de la première partie, ces deux sections ayant une portion de leur contour commune définissant la continuité entre l'embase et la première partie de la queue en l'extrémité du cté extérieur sensiblement convexe située au niveau de la première extrémité de cette dite. première partie, ladite queue comportant en outre une troisième partie bordant lesdites première et deuxième parties le long de leur côté extérieur. More specifically, the subject of the present invention is a fixing lug for a femoral prosthesis joint capable of being fixed in the medular canal of a femur, characterized in that it comprises at least one tail and an integral fixing head of one end of said tail, the fixing head being able to cooperate with the m le part of the ball joint and defining a fixing axis, said tail comprising two first and second consecutive parts, said first part being limited by an inner side substantially concave and by a substantially convex outside catenary in cutaway form and said second part being substantially rectilinear and defining an axis of direction of introduction into said medular channel, said fixing head comprising a base secured to the first end of the first opposite part at the second end corresponding to the junction section of the first part with the second part, the section of the base being greater than that of the first end of the first part, these two sections having a portion of their common outline defining the continuity between the base and the first part of the tail at the end of the substantially convex outer side located at the first end of said section. first part, said tail further comprising a third part bordering said first and second parts along their outer side.
Selon une autre caractéristique de la présente invention, ladite section de jonction entre lesdites première et deuxième parties de la queue est située dans un plan sensiblement perpendiculaire audit axe de fixation. According to another characteristic of the present invention, said junction section between said first and second parts of the tail is located in a plane substantially perpendicular to said fixing axis.
Selon une autre caractéristique de la présente invention, ladite troisième partie de la queue comporte une portion de paroi sensiblement plane liée à ladite portion de contour commune et située dans un plan perpendiculaire audit axe d'introduction. According to another characteristic of the present invention, said third part of the tail comprises a substantially flat wall portion linked to said common contour portion and located in a plane perpendicular to said insertion axis.
Selon une autre caractéristique de la présente invention, au moins l'une des deux première et deuxième parties de ladite queue comporte au moins une rainure longitudinale en creux. According to another characteristic of the present invention, at least one of the two first and second parts of said tail has at least one longitudinal hollow groove.
D'autres caractéristiques et avantages de la présente invention apparaftront au cours de la description suivante donnée en regard des dessins annexés à titre illustratif, mais nullement limitatif, dans lesquels
La figure 1 représente, dans une vue de côté, un mode de réalisation d'une patte selon l'invention,
La figure 2 représente, vue en bout du cté de la tête de fixation, la patte selon la figure 1, et
La figure 3 représente la patte en accord avec les figures 1 et 2, dans une vue en coupe référencée III-III sur la figure 1.Other characteristics and advantages of the present invention will become apparent during the following description given with reference to the drawings annexed by way of illustration, but in no way limitative, in which
FIG. 1 represents, in a side view, an embodiment of a tab according to the invention,
FIG. 2 represents, seen at the end of the side of the fixing head, the tab according to FIG. 1, and
FIG. 3 represents the tab in accordance with FIGS. 1 and 2, in a sectional view referenced III-III in FIG. 1.
Les trois figures représentent une patte de fixation 1 pour une rotule de prothèse destinée à être enfichée dans le canal médulaire 2 d'un fémur 3 représenté en traits interrompus. Cette patte 1 comporte essentiellement deux éléments, un premier élément constituant une queue 4 apte a être enfichée dans le canal médulaire 2 et le second constituant une tête de fixation 5 solidaire d'une extrémité 6 de la queue 4, cette tête 5 étant destinée à coopérer avec la partie mâle d'une rotule, par exemple une portion de sphère connue en elle-même, et définissant un axe de fixation 11. The three figures show a fixing lug 1 for a prosthesis ball intended to be inserted in the medular channel 2 of a femur 3 shown in broken lines. This tab 1 essentially comprises two elements, a first element constituting a tail 4 able to be inserted into the medular channel 2 and the second constituting a fixing head 5 secured to one end 6 of the tail 4, this head 5 being intended to cooperate with the male part of a ball joint, for example a portion of a sphere known in itself, and defining a fixing axis 11.
La queue 4 est essentiellement constituée par une pièce oblongue comportant deux parties consécutives, une première partie 7 et une seconde partie 8 sensiblement rectiligne suivant un axe de direction d'introduction 9 dans le çanal médulaire, ces deux parties se rejoignant suivant une section de jonction 10 sensiblement perpendiculaire à l'axe de fixation 11. Pour ce faire, la première partie 7 de la queue 4 est limitée par un cte intérieur sensiblement concave et par un côté opposé extérieur sensiblement convexe, mais en pan coupé pour réduire l'encombrement de cette prothèse. The tail 4 is essentially constituted by an oblong part comprising two consecutive parts, a first part 7 and a second part 8 substantially rectilinear along an axis of direction of introduction 9 into the median channel, these two parts joining according to a junction section. 10 substantially perpendicular to the fixing axis 11. To do this, the first part 7 of the tail 4 is limited by a substantially concave inner side and by an opposite opposite side which is substantially convex, but in cutaway form to reduce the size of this prosthesis.
Par ailleurs, l'axe de fixation Il fait un angle physiologiquement défini avec l'axe de direction d'introduction 9 dans le canal médulaire. Furthermore, the fixing axis It makes a physiologically defined angle with the direction of introduction axis 9 in the medular canal.
Pour améliorer la fiabilité de l'implantation de la prothèse dans le canal médulaire du fémur, la tête de fixation 5 comporte une embase 20 solidaire de la première extrémité 21 de la première partie 7 de la queue, opposée à la seconde extrémité 22 de cette première partie correspondant à la section de jonction 10, de façon que, comme cela apparat sur les figures 1 et 2, la section 23 de cette embase 20 soit supérieure à celle 24 de la première extrémité 21 de la première partie 7 de la queue. Cependant, ces deux sections 23 et 24 ont une portion de leur contour commune, celle qui correspond au segment 25 sensiblement curviligne définissant la continuité entre l'embase 20 et l'extrémité 26 du côté extérieur en pan coupé 17 de la première partie 7 de la queue située au niveau de la première extrémité 21 de cette première partie. To improve the reliability of the implantation of the prosthesis in the medular canal of the femur, the fixing head 5 comprises a base 20 secured to the first end 21 of the first part 7 of the tail, opposite the second end 22 of this first part corresponding to the junction section 10, so that, as appears in FIGS. 1 and 2, the section 23 of this base 20 is greater than that 24 of the first end 21 of the first part 7 of the tail. However, these two sections 23 and 24 have a portion of their common outline, that which corresponds to the substantially curvilinear segment 25 defining the continuity between the base 20 and the end 26 of the outer cutaway side 17 of the first part 7 of the tail located at the first end 21 of this first part.
L'embase 20 déborde ainsi de la queue au niveau du côté intérieur concave de la première partie 7, ce qui permet de réaliser une meilleure fixation et une meilleure assise de la patte dans l'os du fémur. En effet, il est alors possible de lier avec du ciment la partie haute de la queue avec la partie d'os spongieux de la tête du fémur conservée, et de mieux répartir les efforts auxquels est soumis le fémur d'une jambe, puisque la patte peut alors prendre appui sur la partie d'os spongieux conservée. The base 20 thus overflows from the tail at the concave inner side of the first part 7, which allows better fixation and better seating of the leg in the bone of the femur. Indeed, it is then possible to bond with cement the upper part of the tail with the cancellous bone part of the head of the femur preserved, and to better distribute the forces to which the femur of a leg is subjected, since the leg can then take support on the part of spongy bone preserved.
La patte présente en outre les caractéristiques structurelles suivantes qui permettent une bonne fixation dans le canal 2. En effet, la queue 4 de la patte comporte en outre une troisième partie 30 bordant les deux première 7 et deuxième 8 parties le long de leur côté extérieur respectif 17, 18. Cette troisième partie 30 a une section de forme sensiblement triangulaire dont l'un des côtés est commun avec les c8tés extérieurs 17, 18 des première et deuxième parties, la longueur de ce côté commun étant sensiblement égal à l'épaisseur de ces première et deuxième parties. The tab further has the following structural characteristics which allow good fixing in the channel 2. In fact, the tail 4 of the tab further comprises a third part 30 bordering the first two 7 and second 8 parts along their outer side respective 17, 18. This third part 30 has a section of substantially triangular shape, one of the sides of which is common with the outer sides 17, 18 of the first and second parts, the length of this common side being substantially equal to the thickness. of these first and second parts.
La forme triangulaire donnée à la troisième partie de la queue permet, par le sommet opposé au côté commun, un bon ancrage de la prothèse dans la paroi de l'os dur du canal, et donc de bien solidariser la patte avec le fémur en évitant au maximun les jeux de fixation. The triangular shape given to the third part of the tail allows, by the vertex opposite to the common side, a good anchoring of the prosthesis in the wall of the hard bone of the canal, and therefore to firmly secure the leg with the femur avoiding fixing games as much as possible.
Cette troisième partie 30 comporte en outre une portion de paroi 50 sensiblement plane liée à la portion de contour commune 25 et située dans un plan sensiblement perpendiculaire à l'axe d'introduction 9. Cette portion de paroi 50 constitue de ce fait une surface permettant d'exercer sur la queue de la patte, a l'aide d'outils appropriés, par exemple des marteaux ou analogues, des forces de pénétration dans le canal médulaire 2 parfaitement dirigées suivant l'axe de ce canal, ce qui évite d'exercer sur l'os spongieux plus fragile de la tête du fémur des efforts inutiles qui pourraient lui être nuisibles. This third part 30 further comprises a substantially flat wall portion 50 linked to the common contour portion 25 and situated in a plane substantially perpendicular to the insertion axis 9. This wall portion 50 therefore constitutes a surface allowing to exert on the tail of the paw, using suitable tools, for example hammers or the like, forces of penetration into the medular canal 2 perfectly directed along the axis of this canal, which avoids exert on the more fragile cancellous bone of the head of the femur of the useless efforts which could be harmful to him.
Les deux première et deuxième parties 7 et 8 de la queue 4 sont délimitées par deux faces opposées 13, 14 situées sensiblement dans deux plans sensiblement parallèles séparés d'une distance inférieure à l'épaisseur de la partie haute du canal médulaire 2 du fémur 3. The two first and second parts 7 and 8 of the tail 4 are delimited by two opposite faces 13, 14 located substantially in two substantially parallel planes separated by a distance less than the thickness of the upper part of the medular canal 2 of the femur 3 .
De plus, la deuxième partie 8 de la queue, et éventuellement la seconde extrémité de la première partie 7J devant être maintenue dans le canal médulaire 2 avec du ciment, afin d'augmenter sa surface de contact avec le ciment, les deux faces 13 et 14 comportent chacune au moins une rainure 36, 37 ayant une direction sensiblement parallèle à l'axe d'introduction 9. In addition, the second part 8 of the tail, and possibly the second end of the first part 7J having to be maintained in the medular channel 2 with cement, in order to increase its contact surface with the cement, the two faces 13 and 14 each have at least one groove 36, 37 having a direction substantially parallel to the insertion axis 9.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8813257A FR2637493B3 (en) | 1988-10-10 | 1988-10-10 | FIXING BRACKET FOR A HIP PROSTHESIS BALL JOINT |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8813257A FR2637493B3 (en) | 1988-10-10 | 1988-10-10 | FIXING BRACKET FOR A HIP PROSTHESIS BALL JOINT |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2637493A1 true FR2637493A1 (en) | 1990-04-13 |
FR2637493B3 FR2637493B3 (en) | 1991-01-25 |
Family
ID=9370837
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8813257A Expired - Lifetime FR2637493B3 (en) | 1988-10-10 | 1988-10-10 | FIXING BRACKET FOR A HIP PROSTHESIS BALL JOINT |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2637493B3 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0780106A3 (en) * | 1995-12-20 | 1998-05-13 | Bristol-Myers Squibb Company | Femoral component of a hip joint endoprosthesis |
EP1205164A1 (en) * | 2000-11-07 | 2002-05-15 | Biomet Merck France | Hip prosthesis |
-
1988
- 1988-10-10 FR FR8813257A patent/FR2637493B3/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0780106A3 (en) * | 1995-12-20 | 1998-05-13 | Bristol-Myers Squibb Company | Femoral component of a hip joint endoprosthesis |
EP1205164A1 (en) * | 2000-11-07 | 2002-05-15 | Biomet Merck France | Hip prosthesis |
FR2816827A1 (en) * | 2000-11-07 | 2002-05-24 | Biomet Merck France | HIP PROSTHESIS |
Also Published As
Publication number | Publication date |
---|---|
FR2637493B3 (en) | 1991-01-25 |
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