FR3013211A1 - IMPLANT OF SHOULDER PROSTHESIS, FOR FIXING TOTALLY OR PARTIALLY BY MEANS OF A CEMENT - Google Patents
IMPLANT OF SHOULDER PROSTHESIS, FOR FIXING TOTALLY OR PARTIALLY BY MEANS OF A CEMENT Download PDFInfo
- Publication number
- FR3013211A1 FR3013211A1 FR1361316A FR1361316A FR3013211A1 FR 3013211 A1 FR3013211 A1 FR 3013211A1 FR 1361316 A FR1361316 A FR 1361316A FR 1361316 A FR1361316 A FR 1361316A FR 3013211 A1 FR3013211 A1 FR 3013211A1
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- France
- Prior art keywords
- implant
- pad
- stud
- glenoid implant
- 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
- 239000007943 implant Substances 0.000 title claims abstract description 55
- 239000004568 cement Substances 0.000 title claims description 25
- 241001653121 Glenoides Species 0.000 claims abstract description 17
- 210000001991 scapula Anatomy 0.000 claims abstract description 17
- 238000004873 anchoring Methods 0.000 claims abstract description 13
- 239000004698 Polyethylene Substances 0.000 claims abstract description 6
- -1 polyethylene Polymers 0.000 claims abstract description 6
- 229920000573 polyethylene Polymers 0.000 claims abstract description 6
- 210000000988 bone and bone Anatomy 0.000 claims description 3
- 210000002449 bone cell Anatomy 0.000 claims description 3
- 210000002758 humerus Anatomy 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/40—Joints for shoulders
- A61F2/4081—Glenoid components, e.g. cups
-
- 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
- A61F2002/30822—Circumferential 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
- A61F2002/3085—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
-
- 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
- A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
- A61F2002/30886—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts externally-threaded
-
- 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
- A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
- A61F2002/30891—Plurality of protrusions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2002/4619—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof for extraction
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2002/4631—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
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
Cet implant de glène (1) comprend un plateau de glissement (2) formant, sur une face, une surface d'articulation et qui comporte, sur une face opposée (6), au moins deux plots d'ancrage (3, 4) destinés à être ancrés à l'omoplate, cet implant (1) étant en une seule pièce, notamment en polyéthylène, de sorte que ledit plateau de glissement (2) forme corps avec les plots d'ancrage (3, 4). Selon l'invention : - ladite face opposée (6) du plateau de glissement (2) présente une forme de révolution autour d'un axe perpendiculaire à ce plateau ; - un premier desdits plots (3) est de section circulaire et a son axe confondu avec ledit axe perpendiculaire au plateau (2), et comprend une gorge hélicoïdale (7).This glenoid implant (1) comprises a sliding plate (2) forming, on one face, a hinge surface and which comprises, on an opposite face (6), at least two anchoring studs (3, 4) intended to be anchored to the scapula, this implant (1) being in one piece, in particular polyethylene, so that said sliding plate (2) forms a body with the anchoring studs (3, 4). According to the invention: - said opposite face (6) of the sliding plate (2) has a shape of revolution about an axis perpendicular to this plate; - A first of said pads (3) is of circular section and has its axis coincides with said axis perpendicular to the plate (2), and comprises a helical groove (7).
Description
La présente invention concerne un implant de glène de prothèse d'épaule, destiné à être fixé, totalement ou partiellement, au moyen d'un ciment. Une prothèse totale de l'épaule comprend un implant huméral, généralement sous la forme d'une tige médullaire comportant une tête d'articulation, et un implant de glène, fixé sur l'omoplate, formant une surface d'articulation apte à coopérer avec la surface d'articulation formée par la tête d'articulation. Un implant de glène peut comprendre une embase métallique destinée à être ancrée à l'omoplate, et un plateau de glissement, notamment en polyéthylène, destiné à être monté et retenu sur cette embase et formant ladite surface d'articulation. L'embase comprend des moyens pour son ancrage à l'omoplate, notamment du type plot(s) et/ou vis. Un implant de glène peut également être en une seule pièce, notamment en polyéthylène, et être destiné à être fixé à l'omoplate par un ciment, notamment un ciment synthétique polymérisable. L'implant comprend alors ledit plateau de glissement et un ou plusieurs plots d'ancrage formant corps l'un avec le ou les autres. Pour assurer la liaison entre le ou les plots d'ancrage et le ciment, il est connu d'aménager des gorges successives dans ce ou ces plots, destinées à être envahies par le ciment au moment de la pose, lorsque ce ciment n'est pas encore durci.The present invention relates to a shoulder prosthesis glenoid implant, intended to be fixed, totally or partially, by means of a cement. A total shoulder prosthesis comprises a humeral implant, generally in the form of a medullary stem having a hinge head, and a glenoid implant, attached to the shoulder blade, forming a hinge surface adapted to cooperate with the hinge surface formed by the hinge head. A glenoid implant may comprise a metal base intended to be anchored to the scapula, and a sliding plate, in particular polyethylene, intended to be mounted and retained on this base and forming said articulation surface. The base comprises means for anchoring it to the scapula, in particular of the stud (s) and / or screw type. A glenoid implant may also be in one piece, in particular polyethylene, and be intended to be fixed to the scapula by a cement, in particular a polymerizable synthetic cement. The implant then comprises said sliding plate and one or more anchoring studs forming one body with one or the other. To ensure the connection between the anchoring stud (s) and the cement, it is known to arrange successive grooves in this or these studs, intended to be invaded by the cement at the time of installation, when this cement is not yet hardened.
Un tel implant à fixation par ciment a pour inconvénient d'être difficile à extraire lorsqu'une reprise de la prothèse est nécessaire, ce qui complexifie et allonge l'intervention chirurgicale. La présente invention a pour objectif de remédier à cet inconvénient important, sans qu'il en résulte pour autant un amoindrissement de la résistance de la liaison entre l'implant et l'omoplate. L'implant concerné comprend, de manière connue en soi, un plateau de glissement formant, sur une face, une surface d'articulation avec la tête de l'humérus ou avec une pièce prothétique implantée dans l'humérus, et comportant, sur une face opposée, au moins deux plots d'ancrage destinés à être ancrés à l'omoplate, cet implant étant en une seule pièce, notamment en polyéthylène, de sorte que ledit plateau de glissement forme corps avec les plots d'ancrage. Selon l'invention, - ladite face opposée du plateau de glissement présente une forme de révolution autour d'un axe perpendiculaire à ce plateau ; - un premier desdits plots est de section circulaire et a son axe confondu avec ledit axe perpendiculaire au plateau, et comprend une gorge hélicoïdale dont l'extrémité distale débouche au niveau de l'extrémité libre dudit premier plot. Ainsi, lorsqu'il s'agit d'extraire l'implant, notamment pour opérer une reprise de la prothèse, ledit deuxième plot est sectionné, ce qui libère la possibilité de pivotement de l'implant selon ledit axe dudit premier plot ; l'implant peut alors être manoeuvré en rotation selon cet axe de manière à dévisser l'implant par rapport à l'omoplate. L'implant est ainsi apte à être facilement extrait de cette omoplate.Such a cement fixation implant has the disadvantage of being difficult to extract when resumption of the prosthesis is necessary, which complicates and lengthens the surgical procedure. The present invention aims to overcome this significant disadvantage without resulting in a decrease in the strength of the connection between the implant and the scapula. The implant concerned comprises, in a manner known per se, a sliding plate forming, on one side, a surface of articulation with the head of the humerus or with a prosthetic piece implanted in the humerus, and comprising, on a opposite side, at least two anchoring studs intended to be anchored to the scapula, this implant being in one piece, in particular polyethylene, so that said sliding plate forms a body with the anchoring studs. According to the invention, - said opposite face of the sliding plate has a shape of revolution about an axis perpendicular to the plate; - A first of said pads is of circular section and has its axis coincident with said axis perpendicular to the plate, and comprises a helical groove whose distal end opens at the free end of said first pad. Thus, when it comes to extract the implant, in particular to perform a recovery of the prosthesis, said second pad is cut, which frees the possibility of pivoting of the implant along said axis of said first pad; the implant can then be rotated along this axis so as to unscrew the implant relative to the scapula. The implant is thus able to be easily extracted from this scapula.
Lorsque l'implant est fixé totalement au moyen du ciment, la gorge hélicoïdale dudit premier plot est envahie par le ciment au moment de la pose de l'implant, de sorte qu'après durcissement de ce ciment, ce plot participe activement, avec ledit deuxième plot, à assurer l'ancrage de l'implant. L'implant peut également être fixé partiellement au moyen du ciment, ledit premier plot étant alors ancré à l'omoplate par croissance puis solidification des cellules osseuses au travers de sa paroi ; le ou lesdits deuxièmes plots sont quant à eux destinés à être ancrés à l'omoplate au moyen du ciment. Dans ce cas, ledit premier plot comprend une cavité axiale débouchant dans son extrémité distale, et des ouvertures radiales faisant communiquer cette cavité axiale et l'extérieur du plot, ladite cavité axiale étant apte à recevoir un greffon osseux ou un bloc poreux synthétique destiné à être colonisé par les cellules osseuses en croissance. La forme de révolution de ladite la face opposée peut notamment être une forme convexe, en portion de sphère. De préférence, ledit premier plot a un diamètre supérieur à celui du deuxième plot. Ce premier plot offre ainsi une large surface d'appui contre le ciment. Le diamètre de ce premier plot peut notamment être environ deux fois supérieur à celui du deuxième plot. De préférence, le deuxième plot comprend au moins une cavité aménagée sur sa longueur, délimitée, du côté de l'extrémité libre de ce deuxième plot, par une paroi 30 de ce plot, cette paroi étant telle que cette cavité ne débouche pas au niveau de l'extrémité libre dudit deuxième plot. Ladite cavité est envahie par le ciment au moment de la pose de l'implant, de sorte qu'après solidification du ciment, la portion du ciment présente à l'intérieur de la cavité assure une liaison résistante entre ce deuxième plot et le ciment. Selon une 35 forme de réalisation préférée de l'invention dans ce cas, ledit deuxième plot comprend une pluralité de telles cavités, chaque cavité étant sous la forme d'une gorge circulaire. De préférence, l'implant comprend deux dits deuxièmes plots, situés de part et d'autre dudit premier plot.When the implant is totally fixed by means of the cement, the helical groove of said first pad is invaded by the cement at the time of implant placement, so that after hardening of this cement, this pad actively participates, with said second stud, to ensure the anchoring of the implant. The implant may also be partially fixed by means of the cement, said first pad then being anchored to the scapula by growth then solidification of the bone cells through its wall; the second or second studs are for their part to be anchored to the scapula by means of cement. In this case, said first stud comprises an axial cavity opening into its distal end, and radial openings communicating this axial cavity and the outside of the stud, said axial cavity being able to receive a bone graft or a synthetic porous block intended for to be colonized by growing bone cells. The form of revolution of the said opposite face may in particular be a convex shape, as a portion of a sphere. Preferably, said first pad has a diameter greater than that of the second pad. This first stud thus offers a large surface against the cement. The diameter of this first pad may in particular be approximately twice that of the second pad. Preferably, the second stud comprises at least one cavity arranged along its length, delimited, on the free end side of this second stud, by a wall 30 of this stud, this wall being such that this cavity does not open at the the free end of said second stud. Said cavity is invaded by the cement at the time of installation of the implant, so that after solidification of the cement, the portion of the cement present inside the cavity ensures a strong connection between the second stud and the cement. According to a preferred embodiment of the invention in this case, said second stud comprises a plurality of such cavities, each cavity being in the form of a circular groove. Preferably, the implant comprises two so-called second pads located on either side of said first pad.
Un parfait calage de l'implant en rotation est ainsi obtenu. Alternativement, l'implant comprend trois dits deuxième plots, dont un est situé sur un côté dudit premier plot et deux autres sur le côté opposé de ce premier plot. Une stabilité encore renforcée de l'implant est ainsi obtenue, pour les cas d'os détérioré.Perfect wedging of the implant in rotation is thus obtained. Alternatively, the implant comprises three said second pads, one of which is located on one side of said first pad and two others on the opposite side of this first pad. Increased stability of the implant is thus obtained, for cases of damaged bone.
L'invention sera bien comprise, et d'autres caractéristiques et avantages de celle-ci apparaîtront, en référence au dessin schématique annexé, représentant, à titre d'exemples non limitatifs, deux formes de réalisation possibles de l'implant de glène concerné. La figure 1 est une vue en perspective de l'implant selon une première forme de réalisation ; la figure 2 en est une vue en perspective après mise en place sur une omoplate, cette dernière étant figurée en représentation filaire et étant fictivement représentée comme transparente ; la figure 3 est une vue de l'omoplate et de l'implant, de côté ; la figure 4 est une vue similaire à la figure 3, après extraction de l'implant, et la figure 5 est une vue en perspective de l'implant selon une deuxième forme de réalisation. Les figures 1 à 4 représentent un implant de glène 1 de prothèse d'épaule, destiné à être fixé à une omoplate 100 au moyen d'un ciment synthétique 25 polymérisable. L'implant 1 comprend un plateau de glissement 2 et trois plots d'ancrage 3, 4 destinés à être ancrés à l'omoplate 100. Il est en une seule pièce de polyéthylène, de sorte que le plateau 2 forme corps avec les plots d'ancrage 3, 4. Le plateau de glissement 2 forme, sur une face, une surface 5 d'articulation 30 avec la tête de l'humérus ou avec une pièce prothétique implantée dans l'humérus, et comporte les plots 3, 4 sur la face opposée 6. Cette dernière présente une forme convexe, en portion de sphère. Un premier plot 3 est aménagé au centre de cette face 6, de telle sorte que son axe longitudinal soit perpendiculaire au plan général selon lequel s'étend le plateau 2. Il est de section circulaire et comprend une gorge hélicoïdale 7 dont l'extrémité distale débouche au niveau de l'extrémité libre du plot 3. Les deux plots 4 sont situés de part et d'autre du plot 3, en des emplacements assez proches du bord de périphérie du plateau 2. Chacun d'eux a un diamètre environ deux fois inférieur à celui du plot 3 et une longueur de l'ordre de deux fois et demi inférieure à celle du plot 3. Chaque plot 4 comprend une pluralité de gorges circulaires aménagées de manière étagée sur sa longueur. En pratique, lors de la mise en place de l'implant 1, la gorge hélicoïdale 7 du plot 3 est envahie par le ciment, de même que les gorges circulaires des plots 4.The invention will be well understood, and other features and advantages thereof will become apparent, with reference to the attached schematic drawing, showing, by way of non-limiting examples, two possible embodiments of the glenoid implant concerned. Figure 1 is a perspective view of the implant according to a first embodiment; Figure 2 is a perspective view after placement on a scapula, the latter being figured in wire representation and being fictitiously represented as transparent; Figure 3 is a view of the scapula and the implant, side; Figure 4 is a view similar to Figure 3 after extraction of the implant, and Figure 5 is a perspective view of the implant according to a second embodiment. Figures 1 to 4 show a shoulder prosthesis glenoid implant 1 to be attached to a scapula 100 by means of a polymerizable synthetic cement. The implant 1 comprises a sliding plate 2 and three anchoring studs 3, 4 intended to be anchored to the scapula 100. It is made of a single piece of polyethylene, so that the plate 2 forms a body with the studs. 3, 4. The sliding plate 2 forms, on one side, a hinge surface 30 with the head of the humerus or with a prosthetic component implanted in the humerus, and comprises the pads 3, 4 on the opposite face 6. The latter has a convex shape, as a portion of a sphere. A first stud 3 is arranged in the center of this face 6, so that its longitudinal axis is perpendicular to the general plane in which the plate 2 extends. It is of circular section and comprises a helical groove 7 whose distal end opens out at the free end of the stud 3. The two studs 4 are located on either side of the pad 3, in locations close enough to the peripheral edge of the plate 2. Each of them has a diameter of about two less than that of the stud 3 and a length of the order of two and a half times less than that of the stud 3. Each stud 4 comprises a plurality of circular grooves arranged staggered along its length. In practice, during the placement of the implant 1, the helical groove 7 of the pad 3 is invaded by the cement, as well as the circular grooves of the pads 4.
Après durcissement de ce ciment, les portions de ciment durci présentes dans la gorge 7 et les gorges circulaires des plots 4 assurent une parfaite liaison de l'implant 1 à l'omoplate 100, les plots 3 et 4 participant ainsi activement à assurer l'ancrage de cet implant 1 à cette omoplate. Lorsqu'il s'agit d'extraire l'implant 1, notamment pour opérer une reprise de la prothèse, les plots 4 sont sectionnés, ce qui libère la possibilité de pivotement de l'implant 1 selon l'axe du plot 3; l'implant 1 est alors apte à être manoeuvré en rotation selon cet axe de manière à dévisser l'implant 1 par rapport au ciment, comme visible sur la figure 4. En référence à la figure 5, il apparaît que l'implant 1 selon la deuxième forme de réalisation comprend trois plots 4, dont un est situé sur un côté du plot 3 et les deux autres sur le côté opposé de ce plot 3. Le troisième plot 4 renforce l'ancrage de l'implant, et est destiné à être sectionné de la même façon que les autres plots 4 pour libérer la rotation de l'implant 1, comme mentionné plus haut. Ainsi que cela apparaît de ce qui précède, l'invention fournit un implant de glène de prothèse d'épaule, destiné à être fixé au moyen d'un ciment, ayant l'avantage déterminant d'être facile à extraire lorsqu'une reprise de la prothèse est nécessaire, ce qui simplifie et raccourcit l'intervention chirurgicale. L'invention a été décrite ci-dessus en référence à des formes de réalisation données à titre d'exemples. Il va de soi qu'elle n'est pas limitée à ces formes de réalisation mais qu'elle s'étend à toutes les formes de réalisation couvertes par les revendications ci-annexées.After hardening of this cement, the hardened cement portions present in the groove 7 and the circular grooves of the studs 4 ensure a perfect connection of the implant 1 to the scapula 100, the studs 3 and 4 thus actively participating in ensuring the anchoring this implant 1 to this scapula. When it comes to extract the implant 1, in particular to make a resumption of the prosthesis, the pads 4 are sectioned, which frees the possibility of pivoting of the implant 1 along the axis of the pad 3; the implant 1 is then able to be operated in rotation along this axis so as to unscrew the implant 1 relative to the cement, as can be seen in FIG. 4. With reference to FIG. 5, it appears that the implant 1 according to the second embodiment comprises three studs 4, one of which is located on one side of the stud 3 and the other two on the opposite side of this stud 3. The third stud 4 reinforces the anchoring of the implant, and is intended for be cut in the same way as the other pads 4 to release the rotation of the implant 1, as mentioned above. As is apparent from the foregoing, the invention provides a shoulder prosthesis glenoid implant, to be fixed by means of a cement, having the decisive advantage of being easy to extract when a recovery of the prosthesis is necessary, which simplifies and shortens the surgical procedure. The invention has been described above with reference to embodiments given by way of example. It goes without saying that it is not limited to these embodiments but that it extends to all the embodiments covered by the appended claims.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1361316A FR3013211B1 (en) | 2013-11-18 | 2013-11-18 | IMPLANT OF SHOULDER PROSTHESIS, FOR FIXING TOTALLY OR PARTIALLY BY MEANS OF A CEMENT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1361316A FR3013211B1 (en) | 2013-11-18 | 2013-11-18 | IMPLANT OF SHOULDER PROSTHESIS, FOR FIXING TOTALLY OR PARTIALLY BY MEANS OF A CEMENT |
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| Publication Number | Publication Date |
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| FR3013211A1 true FR3013211A1 (en) | 2015-05-22 |
| FR3013211B1 FR3013211B1 (en) | 2017-01-06 |
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| FR1361316A Active FR3013211B1 (en) | 2013-11-18 | 2013-11-18 | IMPLANT OF SHOULDER PROSTHESIS, FOR FIXING TOTALLY OR PARTIALLY BY MEANS OF A CEMENT |
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| FR (1) | FR3013211B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3048357A1 (en) * | 2016-03-02 | 2017-09-08 | Guy Villaret | GLENOIDAL EMBASE FOR SHOULDER PROSTHESIS, AND IMPLANTATION ASSEMBLY COMPRISING SUCH A GLENOIDIAN EMBASE |
| CN110678151A (en) * | 2017-01-19 | 2020-01-10 | 安可医疗有限公司(以Djo外科名义) | Shoulder implant component |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1013246A1 (en) * | 1998-12-22 | 2000-06-28 | Sulzer Orthopedics Ltd. | Glenoid prosthesis and modular system with glenoid prostheses |
| DE102008053566A1 (en) * | 2007-11-27 | 2009-06-04 | Bernhard Hildebrandt | System of endoprostheses and devices for the minimally invasive and cementless implantation of endoprostheses of the shoulder and the hip and the offset improvement of the femoral neck |
| WO2011073169A1 (en) * | 2009-12-14 | 2011-06-23 | Tornier | Shoulder prosthesis glenoid component |
| EP2481376A1 (en) * | 2011-02-01 | 2012-08-01 | Tornier | Glenoidal implant for shoulder prosthesis and surgical kit |
-
2013
- 2013-11-18 FR FR1361316A patent/FR3013211B1/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1013246A1 (en) * | 1998-12-22 | 2000-06-28 | Sulzer Orthopedics Ltd. | Glenoid prosthesis and modular system with glenoid prostheses |
| DE102008053566A1 (en) * | 2007-11-27 | 2009-06-04 | Bernhard Hildebrandt | System of endoprostheses and devices for the minimally invasive and cementless implantation of endoprostheses of the shoulder and the hip and the offset improvement of the femoral neck |
| WO2011073169A1 (en) * | 2009-12-14 | 2011-06-23 | Tornier | Shoulder prosthesis glenoid component |
| EP2481376A1 (en) * | 2011-02-01 | 2012-08-01 | Tornier | Glenoidal implant for shoulder prosthesis and surgical kit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3048357A1 (en) * | 2016-03-02 | 2017-09-08 | Guy Villaret | GLENOIDAL EMBASE FOR SHOULDER PROSTHESIS, AND IMPLANTATION ASSEMBLY COMPRISING SUCH A GLENOIDIAN EMBASE |
| CN110678151A (en) * | 2017-01-19 | 2020-01-10 | 安可医疗有限公司(以Djo外科名义) | Shoulder implant component |
| US12042392B2 (en) | 2017-01-19 | 2024-07-23 | Encore Medical, L.P. | Shoulder implant components |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3013211B1 (en) | 2017-01-06 |
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