FR2971416A1 - Glenoid implant for use in shoulder prosthesis to reproduce articular surface of scapula, has frame whose peripheral contour edge is arranged in immediate vicinity of peripheral edge of support plate, when frame is assembled with base - Google Patents
Glenoid implant for use in shoulder prosthesis to reproduce articular surface of scapula, has frame whose peripheral contour edge is arranged in immediate vicinity of peripheral edge of support plate, when frame is assembled with base Download PDFInfo
- Publication number
- FR2971416A1 FR2971416A1 FR1151215A FR1151215A FR2971416A1 FR 2971416 A1 FR2971416 A1 FR 2971416A1 FR 1151215 A FR1151215 A FR 1151215A FR 1151215 A FR1151215 A FR 1151215A FR 2971416 A1 FR2971416 A1 FR 2971416A1
- Authority
- FR
- France
- Prior art keywords
- plate
- glenoid implant
- base
- scapula
- implant
- 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 41
- 210000001991 scapula Anatomy 0.000 title claims abstract description 25
- 230000002093 peripheral effect Effects 0.000 title claims abstract description 22
- 241001653121 Glenoides Species 0.000 title claims description 20
- 238000004873 anchoring Methods 0.000 claims abstract description 16
- 239000011148 porous material Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 6
- 230000001737 promoting effect Effects 0.000 claims description 4
- 230000000717 retained effect Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract description 5
- 210000000988 bone and bone Anatomy 0.000 description 5
- 239000004696 Poly ether ether ketone Substances 0.000 description 4
- 229920001903 high density polyethylene Polymers 0.000 description 4
- 239000004700 high-density polyethylene Substances 0.000 description 4
- 229920002530 polyetherether ketone Polymers 0.000 description 4
- 210000002758 humerus Anatomy 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010883 osseointegration Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 210000003484 anatomy Anatomy 0.000 description 1
- 210000003423 ankle Anatomy 0.000 description 1
- 210000002449 bone cell Anatomy 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000000926 separation method Methods 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
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
- A61F2002/305—Snap connection
-
- 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
-
- 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
- A61F2002/30892—Plurality of protrusions 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
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2002/3092—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth having an open-celled or open-pored structure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
- A61F2250/0018—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in elasticity, stiffness or compressibility
Abstract
Description
La présente invention concerne un implant de glène pour prothèse d'épaule. Comme cela est bien connu, une prothèse d'épaule comprend un implant huméral destiné à prendre place sur l'extrémité supérieure de l'humérus, et un implant dit "de glène" destiné à prendre place sur l'omoplate, cet implant de glène reproduisant la surface articulaire de l'omoplate, d'où son nom. Un implant de glène comprend généralement un plateau formant la surface articulaire et un ou plusieurs plots d'ancrage dans l'omoplate. Selon une technique connue, l'implant comprend une embase métallique, fréquemment dénommée "metal back", équipée de moyens d'ancrage à l'omoplate et comprenant un plateau formant une cavité, et un insert en un matériau favorisant le glissement, notamment en polyéthylène à haute densité, reçu dans ladite cavité et retenu dans celle-ci, notamment par clipsage. L'embase est implantée dans l'omoplate sans ciment, par impaction ou vissage. Un tel implant a pour inconvénient important de présenter une épaisseur de polyéthylène assez réduite compte tenu de l'épaisseur du plateau du "metal back", ce qui ne lui permet pas d'avoir une résistance très élevée à l'usure, ou, à l'inverse, d'avoir une épaisseur importante, tendant à latéraliser excessivement l'humérus. De plus, ce type d'implant présente un risque certain de séparation de l'embase et de l'insert au fil des ans. The present invention relates to a glenoid implant for shoulder prosthesis. As is well known, a shoulder prosthesis comprises a humeral implant intended to take place on the upper end of the humerus, and a so-called "glenoid" implant intended to take place on the scapula, this glenoid implant. reproducing the articular surface of the scapula, hence its name. A glenoid implant generally includes a plate forming the articular surface and one or more anchoring pads in the scapula. According to a known technique, the implant comprises a metal base, frequently referred to as "metal back", equipped with means of anchoring to the scapula and comprising a plate forming a cavity, and an insert made of a material promoting sliding, particularly in high density polyethylene, received in said cavity and retained therein, in particular by clipping. The base is implanted in the scapula without cement, by impaction or screwing. Such an implant has the important disadvantage of having a relatively small thickness of polyethylene given the thickness of the plate of the "metal back", which does not allow it to have a very high resistance to wear, or, the opposite, to have a significant thickness, tending to excessively lateralize the humerus. In addition, this type of implant has a certain risk of separation of the base and the insert over the years.
Selon une autre technique connue, un implant de glène est réalisé entièrement en polyéthylène à haute densité, formant d'un seul bloc ledit insert et un ou plusieurs plots de fixation à l'omoplate au moyen d'un ciment. Un tel implant permet une bonne tenue sur l'omoplate et présente une épaisseur de polyéthylène importante. Il s'avère cependant qu'après une durée de l'ordre d'une dizaine d'années, il présente une certaine tendance au descellement et un risque de rupture au niveau du ou des plots d'ancrage. La présente invention vise à remédier à ces inconvénients essentiels. L'implant qu'elle concerne comprend, de manière connue en soi, une embase solidaire de moyens d'ancrage à une omoplate et incluant une surface de support, et un plateau en un matériau favorisant le glissement, notamment en polyéthylène à haute densité, destiné à être placé contre cette surface de support. Selon l'invention, - ladite surface de support est formée par une plaque ayant une épaisseur de l'ordre de 0,5 à 2 mm, et - le plateau forme un bord périphérique de contour ajusté à la forme de cette plaque, venant, lorsque le plateau est assemblé à l'embase, à proximité immédiate du bord périphérique de cette plaque. L'implant selon l'invention comprend ainsi une plaque de support du plateau ayant une épaisseur réduite, apte, lorsque le plateau est assemblé à l'embase, à être intégrée dans l'enveloppe de ce plateau. Cet implant présente ainsi des moyens d'ancrage osseux solidement reliés au plateau, et comprend un plateau ayant une épaisseur importante, sans augmentation excessive de l'épaisseur de l'implant, donc sans risque de latéralisation excessive de l'humérus. Le plateau a une surface d'appui étendue contre le bord périphérique de la plaque de support, sur la majeure partie ou la totalité de ce bord. Selon une possibilité, le plateau est surmoulé sur ladite plaque et forme au moins un retour d'engagement autour du bord périphérique de cette plaque. La liaison de ce plateau à cette plaque est ainsi réalisée, totalement ou partiellement, par l'engagement de ce ou ces retours autour du bord périphérique de la plaque. Ladite plaque peut alors avantageusement présenter un redan périphérique permettant de loger ledit retour que forme le plateau. Ce retour ne fait pas saillie par rapport à la face de la plaque de support destinée à venir au contact de l'omoplate. Cette face peut ainsi venir en contact avec l'omoplate par l'ensemble de sa surface, et cette surface peut comporter un revêtement poreux d'ostéo-intégration de l'implant. Selon une autre possibilité, le plateau comprend un évidement de réception de ladite plaque et l'implant comprend des moyens de fixation du plateau à la plaque de support. Cette forme de réalisation est adaptée à des plateaux en matériaux non moulables, par exemple en PEEK (polyétheréthercétone). Lesdits moyens de fixation peuvent être de toute nature, par exemple collage, vissage. Selon une forme de réalisation préférée de l'invention, dans ce cas, ces moyens de fixation sont formés par une contre-plaque apte à venir contre ladite plaque, du côté opposé au plateau, et à venir en prise avec ce plateau, notamment par encliquetage derrière un bord périphérique que comprend le plateau. Avantageusement, ladite plaque de support comprend au moins une cavité et/ou au moins un trou d'assemblage supplémentaire, destiné à recevoir un plot correspondant que comprend le plateau, ce plot étant engagé dans cette cavité ou ce trou. Une liaison supplémentaire du plateau à ladite plaque de support est ainsi créée. According to another known technique, a glenoid implant is made entirely of high density polyethylene, integrally forming said insert and one or more pads for attachment to the scapula by means of a cement. Such an implant provides good hold on the scapula and has a large thickness of polyethylene. However, it turns out that after a period of about ten years, it has a certain tendency to loosening and risk of rupture at the anchor or studs. The present invention aims to remedy these essential disadvantages. The implant it concerns comprises, in a manner known per se, a base secured to means for anchoring to a scapula and including a support surface, and a plate made of a material promoting sliding, in particular made of high density polyethylene, intended to be placed against this support surface. According to the invention, - said support surface is formed by a plate having a thickness of the order of 0.5 to 2 mm, and - the plate forms a peripheral edge contour adjusted to the shape of this plate, coming, when the plate is assembled to the base, in the immediate vicinity of the peripheral edge of this plate. The implant according to the invention thus comprises a tray support plate having a reduced thickness, adapted, when the tray is assembled to the base, to be integrated in the envelope of this tray. This implant thus has bone anchoring means firmly connected to the plate, and comprises a plate having a large thickness, without excessive increase in the thickness of the implant, thus without risk of excessive lateralization of the humerus. The tray has a bearing surface extended against the peripheral edge of the support plate, over most or all of this edge. According to one possibility, the plate is overmoulded on said plate and forms at least one engagement return around the peripheral edge of this plate. The connection of this plate to this plate is thus achieved, totally or partially, by the engagement of this or these returns around the peripheral edge of the plate. Said plate can then advantageously have a peripheral redan to accommodate said return that forms the plateau. This return does not protrude from the face of the support plate intended to come into contact with the scapula. This face can thus come into contact with the scapula through its entire surface, and this surface may include a porous coating of osseointegration of the implant. According to another possibility, the plate comprises a recess for receiving said plate and the implant comprises means for fixing the plate to the support plate. This embodiment is suitable for trays made of non-moldable materials, for example PEEK (polyetheretherketone). Said fixing means can be of any kind, for example bonding, screwing. According to a preferred embodiment of the invention, in this case, these fixing means are formed by a counterplate able to come against said plate, on the opposite side to the plate, and to come into engagement with this plate, in particular by snap behind a peripheral edge that includes the tray. Advantageously, said support plate comprises at least one cavity and / or at least one additional assembly hole, intended to receive a corresponding pad that comprises the plate, this pad being engaged in this cavity or this hole. An additional connection of the plate to said support plate is thus created.
Ledit plot peut être conformé de manière à être apte à être retenu dans ladite cavité ou ledit trou lorsque le plateau est relié à l'embase. Cette rétention du plot dans un trou correspondant peut-être obtenue par l'aménagement à l'extrémité du plot, du côté de la face de la plaque destinée à venir contre l'omoplate, d'une tête élargie prenant appui contre cette face de la plaque. Cet aménagement peut être réalisé lors du surmoulage du plateau sur l'embase, en moulant cette tête avec le plot, ou par sertissage ou matage de l'extrémité du plot. La rétention du plot dans une cavité ou un trou correspondant pourrait également être réalisée par insertion en force ou encliquetage du plot dans cette cavité ou ce trou. Said stud may be shaped so as to be able to be retained in said cavity or said hole when the plate is connected to the base. This retention of the stud in a corresponding hole can be obtained by the arrangement at the end of the stud, on the side of the face of the plate intended to come against the scapula, an enlarged head bearing against this face of the plaque. This arrangement can be achieved during overmolding of the plate on the base, by molding the head with the stud, or by crimping or matting the end of the stud. The retention of the stud in a cavity or a corresponding hole could also be achieved by insertion in force or snap of the stud in this cavity or this hole.
Avantageusement, lorsque ladite plaque de support comprend une cavité ou un trou tels que précités, cette cavité ou ce trou présente, du côté de la face de la plaque destinée à venir contre l'omoplate, un logement de réception de ladite tête élargie que comprend le plot. Cette tête élargie ne fait donc pas saillie de cette face et ne fait pas obstacle à une venue de la plaque de support au contact de l'os par l'ensemble de sa surface. La plaque de support peut être oblongue vue de face, avec une extrémité longitudinale de plus forte largeur que l'autre extrémité longitudinale, ces deux extrémités longitudinales étant reliées l'une à l'autre par des bords longitudinaux convergeant l'un vers l'autre en direction de ladite autre extrémité longitudinale. Advantageously, when said support plate comprises a cavity or a hole as mentioned above, this cavity or this hole has, on the side of the face of the plate intended to come against the scapula, a housing for receiving said enlarged head that comprises the plot. This enlarged head does not protrude from this face and does not hinder an arrival of the support plate in contact with the bone by its entire surface. The support plate may be oblong seen from the front, with a longitudinal end of greater width than the other longitudinal end, these two longitudinal ends being connected to one another by longitudinal edges converging one towards the other. another in the direction of said other longitudinal end.
Ces extrémités longitudinales peuvent notamment être arrondies. Cette forme s'avère bien adaptée à l'anatomie de l'omoplate. Selon une forme de réalisation préférée de l'invention : - lesdits moyens d'ancrage à l'omoplate comprennent trois chevilles d'ancrage alignées selon un plan médian de l'embase ; - chaque cheville d'ancrage forme une cavité proximale de réception ajustée d'un plot d'ancrage supplémentaire solidaire du plateau ; et - ladite plaque de support comprend trois trous d'ancrage supplémentaire, de réception de plots d'ancrage supplémentaire solidaires du plateau, deux trous se trouvant côte à côte entre une première cheville d'ancrage et la cheville d'ancrage du milieu, en étant alignés perpendiculairement audit plan médian, et le troisième trou se trouvant entre la cheville d'ancrage du milieu et la troisième cheville d'ancrage, au niveau dudit plan médian. Lesdits moyens d'ancrage et/ou ladite plaque de support et/ou ladite contre-plaque peuvent être revêtus d'un matériau poreux dont les pores sont destinés, après implantation, à être envahis par les cellules osseuses en croissance, afin de réaliser une ostéo-intégration de l'implant. 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 10 glène concerné. La figure 1 est une vue en perspective d'une embase que comprend cet implant, selon une première forme de réalisation ; la figure 2 en est une vue en perspective selon une autre direction ; la figure 3 en est une vue de face, par sa face destinée à venir au contact d'une 15 omoplate ; la figure 4 en est une vue en coupe selon la ligne IV-IV de la figure 3 ; la figure 5 en est une vue en coupe selon la ligne V-V de la figure 3 ; la figure 6 est une vue de l'implant en perspective ; la figure 7 en est une vue en perspective selon une autre direction ; 20 la figure 8 en est une vue de face, par sa face destinée à venir au contact d'une omoplate ; la figure 9 en est une vue en coupe selon la ligne IX-IX de la figure 8 ; la figure 10 en est une vue en coupe selon la ligne X-X de la figure 8 ; la figure 11 est une vue de l'implant en perspective éclatée selon la deuxième 25 forme de réalisation, et la figure 12 en est une vue en coupe longitudinale médiane, après assemblage. Les figures 6 à 8 représentent un implant de glène 1 pour prothèse d'épaule, c'est-à-dire un implant destiné à prendre place sur l'omoplate et reproduisant la surface articulaire de l'omoplate. 30 Cet implant 1 comprend une embase métallique 2 et un plateau 3 en un matériau favorisant le glissement, notamment en polyéthylène à haute densité, surmoulé sur l'embase 2. Cette dernière est plus particulièrement visible sur les figures 1 à 5. En référence à ces figures, il apparaît qu'elle comprend une plaque 5 de support du 35 plateau 3 et trois chevilles 6 d'ancrage à une omoplate. These longitudinal ends may in particular be rounded. This form is well adapted to the anatomy of the scapula. According to a preferred embodiment of the invention: said means for anchoring to the shoulder blade comprise three anchoring pins aligned along a median plane of the base; each anchor pin forms a proximal reception cavity fitted with an additional anchor pad integral with the plate; and said support plate comprises three additional anchoring holes, receiving additional anchoring studs integral with the plate, two holes lying side by side between a first anchor pin and the anchor pin of the medium, being aligned perpendicularly to said median plane, and the third hole located between the anchor pin of the middle and the third anchor pin, at said median plane. Said anchoring means and / or said support plate and / or said backing plate may be coated with a porous material whose pores are intended, after implantation, to be invaded by the growing bone cells, in order to achieve osseointegration of the implant. The invention will be better understood, and other features and advantages thereof will become apparent, with reference to the appended diagrammatic drawing, showing, by way of nonlimiting examples, two possible embodiments of the glenoid implant concerned. . Figure 1 is a perspective view of a base that includes this implant, according to a first embodiment; Figure 2 is a perspective view in another direction; Figure 3 is a front view, by its face intended to come into contact with a scapula; Figure 4 is a sectional view along the line IV-IV of Figure 3; Figure 5 is a sectional view along the line V-V of Figure 3; Figure 6 is a perspective view of the implant; Figure 7 is a perspective view in another direction; Figure 8 is a front view, by its face intended to come into contact with a scapula; Figure 9 is a sectional view along the line IX-IX of Figure 8; Figure 10 is a sectional view along the line X-X of Figure 8; Figure 11 is an exploded perspective view of the implant according to the second embodiment, and Figure 12 is a medial longitudinal sectional view after assembly. Figures 6 to 8 show a glenoid implant 1 for shoulder prosthesis, that is to say an implant intended to take place on the scapula and reproducing the articular surface of the scapula. This implant 1 comprises a metal base 2 and a plate 3 made of a material promoting sliding, in particular of high density polyethylene, overmolded on the base 2. The latter is more particularly visible in FIGS. 1 to 5. With reference to FIG. these figures, it appears that it comprises a plate 5 for supporting the plate 3 and three anchors 6 for anchoring to a scapula.
La plaque de support 5 est oblongue vue de face (cf. figure 3), avec une extrémité longitudinale arrondie 5a de plus forte largeur que l'autre extrémité longitudinale 5b, ces deux extrémités longitudinales étant reliées l'une à l'autre par des bords longitudinaux 5c convergeant l'un vers l'autre en direction de l'extrémité 5b. Sa face 5d destinée à recevoir le plateau 3 est plane, et sa face 5e destinée à venir au contact avec une omoplate présente un redan périphérique 7 et trois lamages aménagés en regard de trous 8 qui la traversent. Cette face 5e est revêtue d'un matériau poreux. The support plate 5 is oblong seen from the front (see FIG. 3), with a rounded longitudinal end 5a of greater width than the other longitudinal end 5b, these two longitudinal ends being connected to one another by means of longitudinal edges 5c converging towards each other towards the end 5b. Its face 5d intended to receive the plate 3 is flat, and its face 5e intended to come into contact with a scapula has a peripheral redan 7 and three counterbores arranged opposite holes 8 which pass through it. This face 5e is coated with a porous material.
Les chevilles 6 sont solidaires de la plaque 5 et alignées selon un plan médian de l'embase 2. Chacune d'elle forme une cavité proximale 9 débouchant dans la face 5d et comprend des collerettes à bords libres acérés, de prise d'appui dans l'os de l'omoplate. Deux des trous 8 se trouvent côte à côte entre la cheville 6 située du côté de l'extrémité large 5a et la cheville 6 du milieu, en étant alignés perpendiculairement audit plan médian, et le troisième trou 8 se trouvent entre la cheville 6 du milieu et la cheville 6 situé côté de l'extrémité moins large 5b, en étant situé au niveau dudit plan médian. Le plateau 3 est destiné à être surmoulé sur la plaque de support 6, en formant, ainsi que le montrent particulièrement les figures 9 et 10, un retour 10 entourant le bord périphérique de cette plaque 5 et remplissant le redan 7. Ce plateau 5 forme également trois plots 11 venant remplir les cavités 9 et trois plots 12 remplissant les trous 8 et les lamages de ces trous 8. Ainsi que cela apparaît sur la figure 10, le retour 10 et les têtes élargies des plots 12 affleurent avec la face de la plaque 5 destinée à venir au contact de l'os d'une omoplate, et ne font donc pas obstacle à la venue de cette plaque 5 contre cet os par l'ensemble de sa surface. Le plateau 3 forme par ailleurs une surface articulaire 13 de réception d'une tête d'articulation humérale. Les figures 11 et 12 montrent une autre forme de réalisation de l'implant 1, 30 adaptée à un plateau 3 en un matériau non moulable, par exemple en PEEK (polyétheréthercétone). Dans ce cas, le plateau 3 comprend un évidement 14 de réception ajustée de la plaque 5 et l'implant 1 comprend une contre-plaque 15 apte à venir contre ladite plaque 5, du côté opposé au plateau 3, et à venir en prise avec un bord 35 périphérique 3a de ce plateau, par encliquetage. A cet effet, la contre-plaque 15 comprend des trous 16 pour l'engagement des chevilles 6 et le bord périphérique 3a du plateau 3 comprend une rainure interne 17 dans laquelle est reçu le bord périphérique aminci de la contre-plaque 15. Comme cela apparaît de ce qui précède, l'invention fournit un implant de glène 1 pour prothèse d'épaule présentant les avantages déterminants d'avoir une résistance élevée à l'usure et un faible risque de rupture au niveau de la base de ses chevilles d'ancrage 6. L'invention a été décrite ci-dessus en référence à une forme de réalisation fournie à titre d'exemple. Il va de soi qu'elle n'est pas limitée à cette forme de réalisation mais qu'elle s'étend à toutes les autres formes de réalisation couvertes par les revendications ci-annexées. The pegs 6 are integral with the plate 5 and aligned along a median plane of the base 2. Each of them forms a proximal cavity 9 opening into the face 5d and comprises flanges with sharp edges, bearing in the bone of the scapula. Two of the holes 8 are located side by side between the peg 6 on the broad end 5a side and the middle peg 6, being aligned perpendicular to said median plane, and the third hole 8 are between the middle peg 6 and the peg 6 located next to the less wide end 5b, being located at the level of said median plane. The plate 3 is intended to be overmolded on the support plate 6, forming, as shown particularly in Figures 9 and 10, a return 10 surrounding the peripheral edge of the plate 5 and filling the redan 7. This plate 5 form also three studs 11 filling the cavities 9 and three studs 12 filling the holes 8 and the holes of these holes 8. As shown in Figure 10, the return 10 and the enlarged heads of the studs 12 are flush with the face of the plate 5 intended to come into contact with the bone of a scapula, and therefore do not prevent the coming of this plate 5 against this bone by its entire surface. The plate 3 also forms an articular surface 13 for receiving a humeral articulation head. Figures 11 and 12 show another embodiment of the implant 1, 30 adapted to a plate 3 of a non-moldable material, for example PEEK (polyetheretherketone). In this case, the plate 3 comprises a receiving recess 14 fitted to the plate 5 and the implant 1 comprises a counterplate 15 adapted to come against said plate 5, on the opposite side to the plate 3, and to engage with a peripheral edge 3a of this plate, snap-fastening. For this purpose, the counter-plate 15 comprises holes 16 for the engagement of the pegs 6 and the peripheral edge 3a of the plate 3 comprises an internal groove 17 in which the thinned peripheral edge of the counterplate 15 is received. From the foregoing, the invention provides a glenoid implant 1 for a shoulder prosthesis having the significant advantages of having a high wear resistance and a low risk of rupture at the base of its ankles. anchoring 6. The invention has been described above with reference to an exemplary embodiment. It goes without saying that it is not limited to this embodiment but that it extends to all other embodiments covered by the appended claims.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1151215A FR2971416B1 (en) | 2011-02-15 | 2011-02-15 | GLENE IMPLANT FOR SHOULDER PROSTHESIS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1151215A FR2971416B1 (en) | 2011-02-15 | 2011-02-15 | GLENE IMPLANT FOR SHOULDER PROSTHESIS |
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| Publication Number | Publication Date |
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| FR2971416A1 true FR2971416A1 (en) | 2012-08-17 |
| FR2971416B1 FR2971416B1 (en) | 2014-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR1151215A Active FR2971416B1 (en) | 2011-02-15 | 2011-02-15 | GLENE IMPLANT FOR SHOULDER PROSTHESIS |
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| Country | Link |
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| FR (1) | FR2971416B1 (en) |
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| WO2019106280A1 (en) | 2017-11-28 | 2019-06-06 | Shoulder Friends Institute | Glenoidal implant for shoulder prosthesis |
| US10806587B2 (en) | 2001-08-27 | 2020-10-20 | Zimmer, Inc. | Prosthetic implant support structure |
| US10893947B2 (en) | 2001-08-27 | 2021-01-19 | Zimmer, Inc. | Femoral augments for use with knee joint prosthesis |
| US11141276B2 (en) | 2017-01-20 | 2021-10-12 | Biomet Manufacturing, Llc | Modular augment component |
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| EP1776935A1 (en) * | 2005-10-24 | 2007-04-25 | Benoist Girard Sas | Prosthetic glenoid component |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US10806587B2 (en) | 2001-08-27 | 2020-10-20 | Zimmer, Inc. | Prosthetic implant support structure |
| US10893947B2 (en) | 2001-08-27 | 2021-01-19 | Zimmer, Inc. | Femoral augments for use with knee joint prosthesis |
| WO2016089642A1 (en) * | 2014-12-02 | 2016-06-09 | Biomet Manufacturing, Llc | In-line pegged hybrid glenoid |
| US9713533B2 (en) | 2014-12-02 | 2017-07-25 | Biomet Manufacturing, Llc | In-line pegged hybrid glenoid |
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| US10195043B2 (en) | 2014-12-02 | 2019-02-05 | Biomet Manufacturing, Llc | In-line pegged hybrid glenoid |
| CN107205824B (en) * | 2014-12-02 | 2020-02-28 | 拜欧米特制造有限责任公司 | In-line pile type composite joint socket |
| US11141276B2 (en) | 2017-01-20 | 2021-10-12 | Biomet Manufacturing, Llc | Modular augment component |
| US11559403B2 (en) | 2017-01-20 | 2023-01-24 | Biomet Manufacturing, Llc | Modular augment component |
| WO2019106280A1 (en) | 2017-11-28 | 2019-06-06 | Shoulder Friends Institute | Glenoidal implant for shoulder prosthesis |
| US11471293B2 (en) | 2017-11-28 | 2022-10-18 | Shoulder Friends Institute | Glenoidal implant for shoulder prosthesis |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2971416B1 (en) | 2014-02-14 |
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