FR2697152A1 - Femoral shaft component for total hip joint replacement prosthesis - comprises elongate shaft with lateral longitudinal grooves at distal end to promote flow of bone cement during implantation - Google Patents
Femoral shaft component for total hip joint replacement prosthesis - comprises elongate shaft with lateral longitudinal grooves at distal end to promote flow of bone cement during implantation Download PDFInfo
- Publication number
- FR2697152A1 FR2697152A1 FR9212972A FR9212972A FR2697152A1 FR 2697152 A1 FR2697152 A1 FR 2697152A1 FR 9212972 A FR9212972 A FR 9212972A FR 9212972 A FR9212972 A FR 9212972A FR 2697152 A1 FR2697152 A1 FR 2697152A1
- Authority
- FR
- France
- Prior art keywords
- distal end
- femoral
- hip joint
- prosthesis
- bone cement
- 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.)
- Granted
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
- 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
- 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
Abstract
Description
"PROTHESE TOTALE ANATOMIQUE DE HANCHE CIMENTEE"
La présente invention concerne une prothèse totale anatomique de hanche, comportant une tige fémorale destinée à être implantée et fixée à l'intérieur du fût fémoral à l'aide d'un ciment
L'invention trouve une application particulièrement avantageuse dans le domaine général des produits biomédicaux implantables, et plus précisément les prothèses totales anatomiques de hanche cimentées."TOTAL ANATOMICAL CEMENTED HIP PROSTHESIS"
The present invention relates to a total anatomical hip prosthesis, comprising a femoral stem intended to be implanted and fixed inside the femoral barrel using a cement
The invention finds a particularly advantageous application in the general field of implantable biomedical products, and more precisely total anatomical cemented hip prostheses.
Les prothèses de hanche cimentées, conformes au préambule, présentent une tige fémorale dont le profil est prévu pour s'adapter le mieux possible à la forme complexe de la cavité du fût fémoral, De manière générale , ladite tige de termine à son extrémité distale par une portion de pseudo-cylindre qui est engagé et ajusté dans la partie distale du fémur. Cette extrémité pseudo-cylindrique joue notamment un rôle de guidage lors de l'implantation de la prothèse. Cemented hip prostheses, in accordance with the preamble, have a femoral stem whose profile is designed to adapt as best as possible to the complex shape of the femoral barrel cavity. In general, said stem ends at its distal end by a portion of pseudo-cylinder which is engaged and adjusted in the distal part of the femur. This pseudo-cylindrical end plays in particular a guiding role during the implantation of the prosthesis.
Pour obtenir un cimentage efficace, il esc actuellement admis qu'il faille boucher la partie ass du fémur afin de placer sous pression le ciment destiné à fixer la prothèse, sinon le ciment s'écoule, parfois très loin, vers les condyles de l'articulation du genou. To obtain effective cementing, it is currently accepted that the ass part of the femur must be plugged in order to place the cement intended to fix the prosthesis under pressure, otherwise the cement will flow, sometimes very far, towards the condyles of the knee joint.
C'est pourquoi un bouchon, dit diaphysaire, est placé dans le fût fémoral un peu au-dessous de l'espace nécessaire en longueur à l'implantation de la tige fémorale. This is why a plug, called a diaphyseal plug, is placed in the femoral barrel a little below the space necessary in length for the implantation of the femoral stem.
Ainsi, lorsque la prothèse anatomique est mise en place, on obtient avantageusement, par la forme très remplissante et ajustée de la tige fémorale, une épaisseur faible, homogène et fixe de ciment qui se comporte alors comme une colle et résiste mieux au vieillissement du fait de sa conformation en couche mince. Thus, when the anatomical prosthesis is put in place, one obtains advantageously, by the very filling and adjusted shape of the femoral stem, a thin, homogeneous and fixed thickness of cement which then behaves like an adhesive and is more resistant to aging due to the fact of its thin layer conformation.
Cependant, si la prothèse est implantée aprèe la pose d'un bouchon diaphysaire, ce qui est absolument nécessaire dans ce type de technique, le pseudo-cylindre correspondant à la partie distale de la tige fémorale, engagé dans le fémur obturé par le bouchon diaphysaire, produit un effet de piston très préjudiciable à la pose de la prothèse. However, if the prosthesis is implanted after the fitting of a diaphyseal plug, which is absolutely necessary in this type of technique, the pseudo-cylinder corresponding to the distal part of the femoral stem, engaged in the femur closed by the diaphyseal plug , produces a piston effect very detrimental to the fitting of the prosthesis.
Aussi, le problème technique à résoudre par l'objet de la présente invention est de proposer une prothèse totale anatomique de hanche, conforme au préambule, qui permettrait d'éviter cet effet de piston et favoriserait l'écoulement du ciment, de telle sorte que la pose interne de la prothèse, au contact du fémur, favorise la formation d'une épaisseur faible et homogène du ciment. Also, the technical problem to be solved by the object of the present invention is to propose a total anatomical hip prosthesis, conforming to the preamble, which would make it possible to avoid this piston effect and would promote the flow of cement, so that the internal placement of the prosthesis, in contact with the femur, promotes the formation of a thin and homogeneous thickness of the cement.
La solution au problème technique posé consiste, selon la présente invention, en ce que ladite tige fémorale est munie de moyens d'écoulement dudit ciment constitué par au moins une rainure latérale réalisée le long de l'extrémité distale de la tige fémorale. The solution to the technical problem posed consists, according to the present invention, in that said femoral stem is provided with means for draining said cement constituted by at least one lateral groove produced along the distal end of the femoral stem.
Selon un inonde de mise en oeuvre particulier de l'invention, dans lequel le rôle de guidage de la porion pseudo-cylindrique de la tige fémorale est préservé, il est prévu que lesdits moyens d'écouement dont constitués par deux rainures latérales opposées réalisées le long de l'extrémité distale de la tige fémorale, sur chacune des faces de la prothèse. According to a particular embodiment of the invention, in which the role of guiding the pseudo-cylindrical portion of the femoral stem is preserved, it is provided that said grounding means, of which constituted by two opposite lateral grooves produced on along the distal end of the femoral stem, on each side of the prosthesis.
La description qui va suivre en regard des dessins annexés, donnés à titre d'exemples non limitatifs, fera bien comprendre en quoi consiste l'invention et comment elle peut être réalisée. The description which follows with reference to the appended drawings, given by way of nonlimiting examples, will make it clear what the invention consists of and how it can be implemented.
La figure 1 est une vue de côté d'une prothèse totale anatomique de hanche, conforme à l'invention. Figure 1 is a side view of a total anatomical hip prosthesis, according to the invention.
La figure 2 est une vue en coupe selon la ligne A-A de la figure 1. Figure 2 is a sectional view along line A-A of Figure 1.
La figure 1 montre en vue de côté une prothèse totale anatomique de hanche, comportant une tige fémorale 100 destinée à être implantée et fixée, à l'aide d'un ciment, à l'intérieur du fût fémoral préalablement obturé par un bouchon diaphysaire placé en partie distale du fémur, de manière à empêcher le ciment de se répandre jusque vers les condyles de l'articulation du genou. Figure 1 shows a side view of a total anatomical hip prosthesis, comprising a femoral stem 100 intended to be implanted and fixed, using a cement, inside the femoral barrel previously closed by a diaphyseal plug placed distal part of the femur, so as to prevent the cement from spreading towards the condyles of the knee joint.
La tige fémorale 100 présente dans sa partie inférieure une extrémité distale 110 affectant la forme d'un pseudo-cylindre. Afin d'éviter que cette portion pseudo-cylindrique de la tige 100 ne provoque un effet de piston sur le ciment sous pression lorsque l'extrémité distale 110 est engagée dans le fût fémoral, l'invention prévoit que ladite tige fémorale 100 est munie de moyens d'écoulepent dudit ciment constitués par deux rainures latérales 111,112, que l'on peut mieux voir sur la coupe de la figure 2, réalisées le long de l'extrémité distale 110 de la tige fémorale. The femoral stem 100 has in its lower part a distal end 110 affecting the shape of a pseudo-cylinder. In order to prevent this pseudo-cylindrical portion of the rod 100 from causing a piston effect on the pressurized cement when the distal end 110 is engaged in the femoral barrel, the invention provides that said femoral rod 100 is provided with means for draining said cement constituted by two lateral grooves 111, 112, which can best be seen in the section of FIG. 2, produced along the distal end 110 of the femoral stem.
Ainsi le ciment a la possibilité de se répandre de façon homogène tout autour de la prothèse sous la forme d'une couche de faible épaisseur résultant de la coopération parfaite entre la tige 100 et cavité du fût fémoral. Thus the cement has the possibility of spreading homogeneously all around the prosthesis in the form of a thin layer resulting from the perfect cooperation between the stem 100 and cavity of the femoral barrel.
Lors de l'implantation de la prothèse, les bords 121,122 de la tige fémorale, qui se trouvent sensiblement en position orthogonale par rapport aux faces 201,202, de la prothèse, assurent un guidage de la tige à l'intérieur du fût fémoral. Aussi dans le but de conserver cette faculté avantageuse à la prothèse de hanche selon l'invention, et comme le montrent les figures 1 et 2, les deux rainures latérales 111,112 sont réalisées, opposées l'une à l'autre, le long de l'extrémité distale 110 de la tige fémoral 100, sur chacune des faces 201,202 de la prothèse, laissant ainsi intacts les bords 121,122 de guidage. During implantation of the prosthesis, the edges 121, 122 of the femoral stem, which are substantially in the orthogonal position relative to the faces 201, 202, of the prosthesis, provide guidance of the stem inside the femoral barrel. Also in order to maintain this advantageous ability to the hip prosthesis according to the invention, and as shown in Figures 1 and 2, the two lateral grooves 111,112 are made, opposite to each other, along the distal end 110 of the femoral stem 100, on each of the faces 201, 202 of the prosthesis, thus leaving the guide edges 121, 122 intact.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9212972A FR2697152B1 (en) | 1992-10-23 | 1992-10-23 | Cemented total anatomical hip prosthesis. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9212972A FR2697152B1 (en) | 1992-10-23 | 1992-10-23 | Cemented total anatomical hip prosthesis. |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2697152A1 true FR2697152A1 (en) | 1994-04-29 |
FR2697152B1 FR2697152B1 (en) | 1994-12-23 |
Family
ID=9434999
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9212972A Expired - Fee Related FR2697152B1 (en) | 1992-10-23 | 1992-10-23 | Cemented total anatomical hip prosthesis. |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2697152B1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2528694A1 (en) * | 1982-06-16 | 1983-12-23 | Tornier Sa | Artificial hip medullary joint - incorporates grooves to aid cement distribution on tail of joint section |
US4714470A (en) * | 1986-02-19 | 1987-12-22 | Zimmer, Inc. | Grooved prosthetic implant |
FR2675040A3 (en) * | 1991-04-11 | 1992-10-16 | Biomecanique Integree | Fixation bracket for the male part of a femoral prosthesis ball joint |
-
1992
- 1992-10-23 FR FR9212972A patent/FR2697152B1/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2528694A1 (en) * | 1982-06-16 | 1983-12-23 | Tornier Sa | Artificial hip medullary joint - incorporates grooves to aid cement distribution on tail of joint section |
US4714470A (en) * | 1986-02-19 | 1987-12-22 | Zimmer, Inc. | Grooved prosthetic implant |
FR2675040A3 (en) * | 1991-04-11 | 1992-10-16 | Biomecanique Integree | Fixation bracket for the male part of a femoral prosthesis ball joint |
Also Published As
Publication number | Publication date |
---|---|
FR2697152B1 (en) | 1994-12-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0487433B1 (en) | Partially cemented femoral prosthesis | |
FR2663838A1 (en) | Implant for an arthroplasty, in particular of a glenoid cavity | |
FR2711505A1 (en) | Device for the synthesis of fractures of the upper end of the femur. | |
FR2680461A1 (en) | IMPLANT FOR OSTEOSYNTHESIS DEVICE, ESPECIALLY OF THE RACHIS, AND CORRESPONDING DEVICE FOR ITS PLACEMENT. | |
FR2781998A1 (en) | Implantable prosthesis for bone, has frangible connection between handling and implant sections of implant rod | |
EP0050533B1 (en) | Femoral head endoprothesis with self locking stem | |
FR2606997A1 (en) | SELF-BLOCKED MECHANICAL FEMALE PROSTHESIS AND METHOD OF IMPLEMENTING THE SAME | |
EP0241361B1 (en) | Hip prosthesis | |
EP0720839A1 (en) | Femoral shaft with twisted profile for hip prosthesis | |
EP0359672B1 (en) | Articulation prosthesis, in particular a hip prosthesis, with a self-damping property | |
FR2697152A1 (en) | Femoral shaft component for total hip joint replacement prosthesis - comprises elongate shaft with lateral longitudinal grooves at distal end to promote flow of bone cement during implantation | |
FR2708192A1 (en) | Obturator for bone cavities | |
FR2683717A1 (en) | Femoral stem for total hip prosthesis | |
FR2728160A1 (en) | Hip prosthesis shank and medullary cavity file | |
FR2538242A1 (en) | New articular prosthesis with cementless anchoring | |
FR2703583A1 (en) | Femoral implant for hip prosthesis | |
FR2873913A1 (en) | Intramedullary fixation device for femur fracture, has jig bushing fixed in oblique passage of intramedullary nail, and including channels to receive, via their respective insertion ends, cephalic screw end and threaded end of cephalic stem | |
FR2676359A1 (en) | Femoral shaft for a hip prosthesis | |
FR2681239A1 (en) | Shaft for total hip prosthesis | |
FR2844701A1 (en) | Osteosynthesis equipment for long bones comprises pin and stop engaged on pin part past proximal bone fragment and part gripping pin zone going past proximal fragment, pin being immobilized relative to distal bone fragment | |
EP1639964A1 (en) | Femoral stem for a hip prosthesis | |
FR2720931A1 (en) | Femoral shank for hip prosthesis | |
WO1991016016A1 (en) | Hip prosthesis tail designed for cement-free implantation, and device therefor | |
FR2827155A1 (en) | Hip prosthesis femoral shank has pairs of cavities in inner face of metaphysis section | |
FR2896985A1 (en) | Above-knee prosthesis e.g. hip prosthesis, for femur, has femoral stem inserted in medullary cavity of femur and deflected with respect to socket to laterally expand socket against femur to block prosthesis |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |