WO2012146910A1 - Coupe acétabulaire - Google Patents

Coupe acétabulaire Download PDF

Info

Publication number
WO2012146910A1
WO2012146910A1 PCT/GB2012/050850 GB2012050850W WO2012146910A1 WO 2012146910 A1 WO2012146910 A1 WO 2012146910A1 GB 2012050850 W GB2012050850 W GB 2012050850W WO 2012146910 A1 WO2012146910 A1 WO 2012146910A1
Authority
WO
WIPO (PCT)
Prior art keywords
shell
liner
plate
recess
bone
Prior art date
Application number
PCT/GB2012/050850
Other languages
English (en)
Inventor
Michael Tuke
Original Assignee
Finsbury (Development) Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Finsbury (Development) Ltd filed Critical Finsbury (Development) Ltd
Publication of WO2012146910A1 publication Critical patent/WO2012146910A1/fr

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
    • A61F2/34—Acetabular 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
    • A61F2002/30331—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
    • A61F2002/30332—Conically- or frustoconically-shaped protrusion and recess
    • 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
    • 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
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30589—Sealing means
    • 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
    • A61F2002/30667—Features concerning an interaction with the environment or a particular use of the prosthesis
    • A61F2002/30682—Means for preventing migration of particles released by the joint, e.g. wear debris or cement particles
    • 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
    • A61F2/34—Acetabular cups
    • A61F2002/3412—Acetabular cups with pins or protrusions, e.g. non-sharp pins or protrusions projecting from a shell surface
    • A61F2002/3414—Polar protrusion, e.g. for centering two concentric shells

Definitions

  • the present invention relates to a surgically implantable cup.
  • the invention relates to a cup for implanting into a patient's body secured to the surface of a bone to form part of a prosthetic joint.
  • An embodiment of the present invention relates to an acetabular cup for implanting into the acetabulum of a patient.
  • the acetabular cup component of a hip joint prosthesis typically comprises a part-spherical shell which can be implanted in a hole or recess prepared in the patient's acetabulum.
  • the shell is formed from a metal.
  • a liner component may be fitted to the shell to provide articulating contact with a convex femoral head implant.
  • the liner is typically formed from a polymeric material.
  • the cup is typically provided with at least one screw hole in the wall of the shell to receive a screw passing into the bone to secure the shell to the bone.
  • a screw passing into the bone may accumulate within the shell or the liner. Additionally, slight movement between the shell and the liner may also generate debris. If that debris passes through a screw hole to the interface region between the shell and the bone this can cause irritation and reduce the strength of the implant and cause bone lucency.
  • multiple screw holes are provided in the shell to allow flexibility for the surgeon to select screw holes according to clinical indications then it may be necessary to provide hole blanks to seal the unused holes to prevent debris passing through.
  • a conventional implanted hip joint comprising a shell and a liner may generate a pumping pressure between the shell and the liner caused by slight movement between the shell and the liner.
  • the liner may then move within the shell and act as a piston in a hydraulic cylinder generating a variable pressure between the shell and the liner. It is difficult to design a liner and shell system to fit together sufficiently so as to prevent this movement.
  • the pumping pressure can exacerbate the flow of debris within the shell through screw holes to the interface between the shell and the bone.
  • fluid within the shell is in hydraulic communication with the tissue behind the shell though the screw holes. Cyclic pumping pressure of that fluid may be a cause of bone resorbtion.
  • the head of a screw within a shell screw hole typically does not form a sufficiently good seal to prevent the flow of debris through the screw hole. Shortly after implantation bone screws typically slightly loosen during settling of the implant, again reducing the seal to the shell wall. Where screw-in or taper fit hole blanks are used to close off unused screw holes, these may also not provide a sufficiently good seal to prevent the flow of debris through the screw hole.
  • a cup for implanting in a patient's body coupled to the surface of a bone comprising: a shell defining a recess including at least one screw hole in the wall of the shell arranged to receive a screw passing into a bone to secure the shell to the surface of the bone; a plate arranged to be received in the shell recess; and a liner arranged to be received within the shell recess such that the plate is positioned between the shell and the liner, the liner defining an interior concave articulating surface; wherein the plate is arranged to separate the at least one screw hole from the liner.
  • An advantage of the present invention is that because the plate seals to the shell such that the screw holes are separate from the liner, the risk of debris from the liner or a femoral head implant passing through a screw hole to the interface region between the shell and the bone is reduced. If there are unused screw holes, it is no longer necessary to provide hole blanks. Additionally, a hole blank is not required to seal an apical hole within the shell used to couple to an inserter instrument when inserting the shell into a bone cavity. No longer requiring hole blanks at least partially offsets the cost of the plate. Additionally, inserting hole blanks into unused screw holes is difficult to do once the shell is implanted. Consequently, the plate may reduce the amount of time required to implant a cup.
  • the liner and the plate may be coupled together before being delivered to the surgeon so that there is no additional surgical step required.
  • a further advantage of the present invention is that in the event that the cup sinks into the bone the screw heads will not penetrate into the liner, which is a known cause of implanted cup failure.
  • the configuration of the shell, plate and liner reduces movement and fretting within the cup, thereby reducing the amount of debris at risk of working its way through to the interface region between the shell and the bone.
  • the plate may have a periphery and the plate may be arranged to contact the shell about at least a portion of the periphery.
  • the plate may be arranged to seal to the shell about the periphery of the plate such that the seal extends about a portion of the wall of the shell recess surround the or each screw hole. At least a portion of the periphery of the plate may form a deformable flange arranged to press against the wall of the shell recess to contact the shell.
  • the periphery of the plate may form a deformable flange arranged to press against the wall of the shell recess to seal the plate to the shell.
  • the wall of the shell recess may further comprise a groove arranged to receive the deformable flange.
  • the cup may further comprise a resilient band arranged to be received between the periphery of the plate and the wall of the shell recess to seal the plate to the shell.
  • the shell may comprise an aperture or depression arranged to receive a boss extending from the plate to align the plate to the shell recess.
  • the shell may be generally defined by a portion of a sphere and the shell aperture or depression is positioned at the pole of the portion of a sphere.
  • the surface of the plate facing the wall of the shell recess may comprise a depression arranged to match the shape and position of a head of a screw passing through a screw hole into the bone.
  • Part of the exterior surface of the liner may be tapered and part of the wall of the shell recess may comprise a corresponding taper such that the liner and the shell form a taper lock when the liner is inserted into the shell.
  • At least one of the plate and the shell may comprise barbs facing into the shell recess and arranged to engage the liner to secure the liner within the shell recess.
  • the interior concave articulating surface of the liner may be defined by a portion of a spherical surface.
  • a method of implanting a cup in a patient's body coupled to the surface of a bone comprising: passing a screw through at least one screw hole in a wall of a shell into a bone to secure the shell to the surface of the bone, the shell defining a recess; inserting a plate into the shell recess; and inserting a liner into the shell recess such that the plate is positioned between the shell and the liner, the liner defining an interior concave articulating surface; wherein the plate separates the at least one screw hole from the liner.
  • Figure 1 illustrates a cup in accordance with a first embodiment of the present invention
  • Figures 2a to 2d illustrate alternative resiliently deformable flanges which may form part of the cup of figure 1 ;
  • Figures 3 and 4 illustrate first and second steps in assembling the cup of figure 1;
  • Figure 5 illustrates a cup in accordance with a second embodiment of the invention; and
  • Figures 6a to 6c illustrate different options for securing the plate of figure 5 to the shell of figure 5.
  • FIG 1 illustrates an acetabular cup in accordance with a first embodiment of the present invention.
  • the cup comprises a shell 2, a liner 4 and a plate 6 arranged to seal to the shell 2 such that the plate 6 closes off the base of the shell 2 from the liner 4.
  • the liner 4 has an interior articulating surface 8 that generally conforms to a portion of a sphere.
  • the articulating surface 8 is suitable for articulation with a
  • the shell 2 is arranged to be secured to the surface of a bone. Specifically, the shell is arranged to be received within a prepared socket formed in the surface of a bone.
  • the shell 2 is generally hemispherical or part spherical and is hollow to receive the plate 6 and the liner 8 as will be described below.
  • To secure the shell 2 to the bone at least one screw hole 10 is formed in the shell 2, generally towards the pole of the shell 2.
  • a screw (not illustrated) can be passed through the screw hole 10 until the screw head is positioned within the screw hole 10.
  • the plate 6 seals to the shell 2 to separate the or each screw hole 10 from the liner 4.
  • the plate 6 generally matches the shape of the base of the shell 2.
  • Shell 2 is further provided with a socket 12 at or close to the pole defined by the part spherical shell.
  • Socket 12 may extend partially or fully through the wall of the shell 2.
  • the plate 6 comprises a corresponding boss 14 which is arranged to press fit into the socket 12 to ensure the plate 6 is correctly aligned with the shell 2.
  • Boss 14 may be secured within socket 12 with an impaction force.
  • Plate 6 further comprises a domed groove 16 extending annularly about the boss 14.
  • the dome groove 16 is shaped to fit the screw head received in the or each screw hole 10 and to apply pressure to the screw head to prevent the screw head from backing out of the bone through the screw hole 10 as the screws loosen after implantation.
  • Around the rim of the plate 6 is a resiliency deformable flange 18.
  • Flange 18 is arranged to deform as the plate 6 is inserted into the shell 2 to engage an annular groove 20 extending about the shell 2. This engagement serves to prevent the plate 6 from pulling out of the shell 2 and also seals the plate 6 to the shell 2 to prevent debris from passing from the liner recess defined by the shell 2 and the plate 6 to the or each screw hole 10.
  • the snap in solid plate 6 is designed to not move as a piston within the shell recess, as may occur with the liner.
  • the plate 6 compartmentalises the screws and screw holes from the liner such that the pumping pressure generated by movement of the liner within the shell does not pass to the screw holes.
  • FIGS. 2a to 2d these illustrate alternative flanges 18 that may be combined with the plate 6 of figure 1.
  • Figures 2a to 2d are enlargements of the region of the cup shown in circle 19.
  • Figure 2c is an enlargement of the form of flange 18 shown in figure 1.
  • flange 18 is arranged to be bent upwards and inwards as the plate 6 is inserted into the shell 2 before reverting towards its unstressed position to engage groove 20.
  • the flange 18 may be desirable for the flange 18 to remain stressed when engaged in groove 20 to ensure that it presses against the shell wall.
  • Figure 2c illustrates in phantom the stressed position of the flange 18 during insertion of the plate 6 into the shell 2 before the flange 18 engages the groove 20.
  • Figure 2c illustrates the rim of the plate 2 further comprising an upwards extending second flange 22 to provide a further seal to the shell 2.
  • Figures 2a and 2b show different shapes of flange 18 that are engage the groove 20 in generally the same way as for figure 2c.
  • the flange 18 of figure 2d comprises two prongs forming a U or V shape arranged to seat on the edge of groove 20 with one prong within the groove and one prong outside of the groove. In alternative embodiments of the present invention there may be no flange at all.
  • the periphery of the plate 6 may have a straight edge arranged to contact the wall of the shell 2 such that the plate 6 is generally dish shaped with a raised rim. Strain within the dished plate causes the rim to bear against the wall of the shell 2 to effect a seal separating the liner 4 from the or each screw hole 10.
  • Boss 14 of plate 6 is hollow as illustrated in figure 1 to form a further socket 24 to receive a boss 26 at the pole of liner 4.
  • Boss 26 serves to ensure that the shell is correctly aligned to the shell 2 and the plate 6 as it is inserted into a liner recess defined by the shell 2 and the plate 6.
  • the liner 4 may be coupled to the plate 6 before they are inserted together into the shell.
  • the boss 26 forms a press fit in socket 24.
  • the boss 26 is engaged by barbs 28 within socket 24 to prevent the liner 4 from separating from the plate 6.
  • the upper part of liner 4 forms a taper 30 and the upper part of the inside edge of the shell 2 has a tapered part 32 such that when the liner 4 is inserted into the shell 2 it locks to the shell 2.
  • An impaction force may be applied to the liner 4 to achieve the taper lock.
  • the first step illustrated in figure 3 is to insert the liner 4 into the plate 6 such that barbs 28 (not visible in figure 3) engage boss 26.
  • the liner 4 and the plate 6 may be assembled at a factory (or at least before being passed to the surgeon) under pressure to ensure a tight coupling.
  • Figure 4 shows the combined liner 4 and plate 6 being inserted into the shell 2 after the shell 2 has been coupled to a bone 34 by at least one bone screw 36 (the bone 34 is illustrated cut away to reveal hidden detail).
  • Figure 4 further illustrates the outside of the shell 2 comprising ribs 38 to grip the bone 34 to prevent the shell 2 rotating.
  • FIG 5 illustrates a cup in accordance with a second embodiment of the invention.
  • the second embodiment of the invention is generally similar to the first embodiment, and so corresponding features are identified by reference numbers incremented by 100.
  • Plate 106 is arranged to seal to cup 102 by bearing against a polymeric band 150 which has a square cross section. The arrangement of plate 106, shell 102 and O-ring 150 is shown enlarged in figure 6b.
  • Figure 6a shows an alternative arrangement with an O-ring 152 having a circular cross section.
  • Figure 6c shows a further option with a resiliency deformable flange 154 similar to the arrangement of figures 2a to 2d.
  • the polymeric band or O-ring of figure 5 may be used in combination with the deformable flanges 18 of figures 2a to 2d to provide additional sealing.
  • Plate 106 comprises a boss 114 arranged to be received within a socket 112 within the shell 102.
  • boss 114 may be a press fit within the socket 112.
  • boss 114 may be a screw fit driven by a screwdriver which engages slot 156.
  • liner 104 does not include a boss to be received within a socket formed in the plate 106.
  • Liner 104 includes a tapered section 130, and shell 132 comprises a corresponding tapered section 132 to lock the liner 104 to the shell 102.
  • tapered section 132 further comprises barbs 158 to engage the liner 104 to lock the liner in place.
  • Barbs 158 are broken, for instance in three places, to prevent the liner 104 from rotating within the liner socket. It will be understood that similar barbs may be provided within tapered portion 32 of the shell 2 of figure 1.
  • the boss 114 of plate 106 may be impacted into the socket 112.
  • the liner 104 cannot be coupled to the plate 106 before the two components are inserted into the shell 102.
  • the liner 4, 104 protrudes above the rim of the shell 2, 102 and is chamfered about its outer edge to slope down to the rim of the shell.
  • the plate 6, 106 serves to seal the screw holes 10, 110 from the liner 4, 104.
  • An exhaust groove may be formed to reduce the pressure difference between the articulating surface and the reverse side of the liner. The groove may run around the edge of the liner adjacent to the shell. Alternatively, a hole through the liner to the articulating surface would achieve the same pressure relief.
  • the shell is preferably formed from a biocompatible and high strength material capable of resisting deformation under the forces typically experienced for implanted acetabular cups.
  • Suitable materials include metals, plastic materials such as polymers including ultra high molecular weight polyethylene (UHMWPE), polyetheretherketone (PEEK) or carbon reinforced PEEK or ceramics.
  • UHMWPE ultra high molecular weight polyethylene
  • PEEK polyetheretherketone
  • the shell may be formed from titanium alloy coated with a material on the outside to encourage bone growth to assist in securing the cup to the bone.
  • the plate may be formed from a metal such as titanium, titanium alloy, stainless steel or a cobalt chrome alloy with a resiliently deformable rim.
  • the liner may be formed from a plastic material to provide a smooth articulating surface.
  • XLPE cross linked polyethylene
  • HXLPE highly cross linked polyethylene
  • the liner is at least 6mm thick.
  • the liner may be metallic or ceramic.

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

La présente invention concerne une coupe et un procédé d'implantation dans le corps d'un patient, permettant un accouplement à la surface d'un os. Ladite coupe comprend une coque (2) définissant un renfoncement, qui comporte au moins un trou de vis (10) dans la paroi de la coque prévu pour accueillir une vis passant dans un os pour fixer la coque à la surface de l'os. Une plaque (6) est placée de manière à être reçue dans le renfoncement de coque. Une doublure (8) est disposée de manière à être accueillie dans le renfoncement de la coque, de sorte que la plaque soit positionnée entre la coque et la doublure. Ladite doublure définit une surface d'articulation concave intérieure. Ladite plaque est placée de manière à séparer le ou les trous de vis de la doublure, pour empêcher que le matériau porté ne migre depuis l'intérieur de la coque à travers le trou de vis dans l'os.
PCT/GB2012/050850 2011-04-27 2012-04-18 Coupe acétabulaire WO2012146910A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1106973.9A GB201106973D0 (en) 2011-04-27 2011-04-27 A cup
GB1106973.9 2011-04-27

Publications (1)

Publication Number Publication Date
WO2012146910A1 true WO2012146910A1 (fr) 2012-11-01

Family

ID=44168560

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2012/050850 WO2012146910A1 (fr) 2011-04-27 2012-04-18 Coupe acétabulaire

Country Status (2)

Country Link
GB (1) GB201106973D0 (fr)
WO (1) WO2012146910A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0341199A1 (fr) * 1988-04-25 1989-11-08 GebràœDer Sulzer Aktiengesellschaft Cotyle artificiel de la hanche
DE19520495C1 (de) * 1995-06-03 1996-11-14 Werner Scholz Künstliche Hüftgelenkpfanne
EP1163891A1 (fr) * 2000-06-17 2001-12-19 Biomet Merck Deutschland GmbH Elément de fermeture pour des systèmes d'endoprothèses
US20080255672A1 (en) * 2007-04-10 2008-10-16 Warsaw Orthopedic, Inc. Orthopedic implant

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0341199A1 (fr) * 1988-04-25 1989-11-08 GebràœDer Sulzer Aktiengesellschaft Cotyle artificiel de la hanche
DE19520495C1 (de) * 1995-06-03 1996-11-14 Werner Scholz Künstliche Hüftgelenkpfanne
EP1163891A1 (fr) * 2000-06-17 2001-12-19 Biomet Merck Deutschland GmbH Elément de fermeture pour des systèmes d'endoprothèses
US20080255672A1 (en) * 2007-04-10 2008-10-16 Warsaw Orthopedic, Inc. Orthopedic implant

Also Published As

Publication number Publication date
GB201106973D0 (en) 2011-06-08

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