EP1933771A1 - Endoprothese de l'articulation scapulohumorale de formation inverse - Google Patents

Endoprothese de l'articulation scapulohumorale de formation inverse

Info

Publication number
EP1933771A1
EP1933771A1 EP06790931A EP06790931A EP1933771A1 EP 1933771 A1 EP1933771 A1 EP 1933771A1 EP 06790931 A EP06790931 A EP 06790931A EP 06790931 A EP06790931 A EP 06790931A EP 1933771 A1 EP1933771 A1 EP 1933771A1
Authority
EP
European Patent Office
Prior art keywords
shell
pan
prosthesis according
peek
titanium
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.)
Withdrawn
Application number
EP06790931A
Other languages
German (de)
English (en)
Inventor
Hans-Kaspar Schwyzer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Smith and Nephew Orthopaedics AG
Original Assignee
Plus Orthopedics AG
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 Plus Orthopedics AG filed Critical Plus Orthopedics AG
Publication of EP1933771A1 publication Critical patent/EP1933771A1/fr
Withdrawn legal-status Critical Current

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
    • A61F2/40—Joints for shoulders
    • A61F2/4003—Replacing only the epiphyseal or metaphyseal parts of the humerus, i.e. endoprosthesis not comprising an entire humeral shaft
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/3082—Grooves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/3085—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
    • 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
    • A61F2/40—Joints for shoulders
    • A61F2/4014—Humeral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic humeral shafts
    • A61F2002/4018—Heads or epiphyseal parts of humerus
    • A61F2002/4022—Heads or epiphyseal parts of humerus having a concave shape, e.g. hemispherical 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
    • A61F2/40—Joints for shoulders
    • A61F2/4081—Glenoid components, e.g. cups
    • A61F2002/4085—Glenoid components, e.g. cups having a convex shape, e.g. hemispherical heads
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2002/4631—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor the prosthesis being specially adapted for being cemented
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00011—Metals or alloys
    • A61F2310/00017—Iron- or Fe-based alloys, e.g. stainless steel
    • 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
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00011—Metals or alloys
    • A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
    • 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
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00011—Metals or alloys
    • A61F2310/00029—Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
    • 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
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00179—Ceramics or ceramic-like structures
    • 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
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00389—The prosthesis being coated or covered with a particular material
    • A61F2310/00395—Coating or prosthesis-covering structure made of metals or of alloys
    • A61F2310/00407—Coating made of titanium or of Ti-based alloys
    • 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
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00389—The prosthesis being coated or covered with a particular material
    • A61F2310/00592—Coating or prosthesis-covering structure made of ceramics or of ceramic-like compounds
    • 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
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00389—The prosthesis being coated or covered with a particular material
    • A61F2310/00592—Coating or prosthesis-covering structure made of ceramics or of ceramic-like compounds
    • A61F2310/00796—Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite

Definitions

  • the present invention relates to a shoulder joint prosthesis according to the preamble of claim 1.
  • joint replacement for the shoulder joint consists of replacing only the humerus-sided articular surface, the humeral head (hemi-arthroplasty), or both articular surfaces, that is, the humeral head and the glenoid (total arthroplasty).
  • Both monoblock and modular endoprostheses are used. Both the humeral implants and those in the scapula are cementless as well as cemented.
  • Cemented glenoid implants have a convex back surface which has either pegs or keels for anchoring in the bone.
  • Pegs are more or less circularly shaped pegs that are anchored in holes in the scapula, while keels are keel-shaped, which are usually centrally located on the back of the socket to anchor them in the scapula
  • Cement-free designs have a sandwich construction which usually consists of a metal part and a polyethylene part anchored therein. The metal part is anchored in the bone by means of screws, spreader screws, coated pins or press-on pins.
  • the humeral implants are largely anchored in bone by bone cement.
  • cementless systems are also used. These are either made of titanium alloy, which are already biocompatible by themselves and allow bone growth, or CoCr alloys or stainless steels are used, which have a coating (usually hydroxyapatite), which are to promote bone growth.
  • These components are mostly made of metal, cobalt chrome or titanium alloy or pure titanium, which also ceramics and plastics are used.
  • the systems described above serve on the one hand the pain elimination and on the other hand, coupled with the pain elimination, an improvement of the mobility. Their use is indicated for articular cartilage wear as well as for humeral necrosis after fractures.
  • the angle of inclination that the socket occupies in the humerus largely determines the stability of the shoulder and also has an influence on the mobility (range of motion) and a possible unwanted touching in the distal scapular area (notehing). All systems currently on the market have a fixed inclination. This may be a disadvantage depending on the anatomical conditions of the patient. It would be desirable for the surgeon to be able to influence the inclination intraoperatively.
  • the force is introduced, inter alia, in zones that are not or not so heavily loaded under normal conditions. This can lead, especially at the shank end, to bone loss as a result of stress shilding and as a result to fractures. It would be desirable here a force, as it is also given by the healthy anatomy and biomechanically causes similar loads.
  • An object of the present invention is thus to achieve the least possible damage to the humeral bone by the implant claimed only as much space as absolutely necessary. If the inverse design of a pan-like task is taken over by the humerus, then the design of the implant should be based on this task.
  • the load transfer should take place where it also occurs mainly in healthy bones. This means proximally. Distal stress peaks and inhomogeneities in the force curve should be avoided as much as possible.
  • inverse shoulder joint prosthesis or an implant which is based on the idea of inverse shoulder arthroplasty, which, however, has no distal component in comparison to conventional systems or in which the shell or socket is anchored in the proximal humerus without a shaft.
  • the humerus-sided shoulder implant can either consist of at least two components in the modular case or, in exceptional cases, also consist of a single, for example, cemented component.
  • the humerus-sided shoulder implant consists of the mentioned shell or cup, as well as a sliding component, which is used in this shell or by means of which the inner surface of the shell or pan is coated.
  • the mentioned shell can be fixed both cement-free, as well as cemented in the humerus.
  • the fixation can be done both by a press fit, as well as by a screw-like design of the outer contour.
  • the press-fit procedure the contour of the outer surface of the pan is milled into the bone, with a small undersize relative to the implant. In this hemispherical cavity, the hemispherical implant is also hit and receives by the so-called press-fit its primary stability.
  • the shell may be coated for better bone integration by means of hydroxyapatite or other calcium phosphates and / or osteoindictive materials as well as with growth factors.
  • Calcium phosphates are used for better bony integration.
  • they are also used as coatings for orthopedic implants in order to achieve a faster and more stable attachment of the bone.
  • the outer surface of the shell or pan may correspond to a spherical or ellipsoidal surface, but it may also be a frusto-conical surface. Additional surface designs, such as grooves, grooves, fins, pins, bone screws or the like, for better fixation of the press-fit composite are also conceivable.
  • Any through holes for the insertion of bone screws may be threaded to achieve a stable angle connection.
  • the surface preferably has the geometry of a frustoconical surface, which may also be doppelkonisch or spherical.
  • CF / PEEK stands for carbon fiber reinforced polyetheretherketone, the latter being a semi-crystalline thermoplastic, which has long been known in the medical field and is considered to be biocompatible.
  • the coating can consist of either titanium or titanium / HA (hydroxyapatite) layers, which are applied, for example, by means of vacuum plasma sprays or in deposition processes, for example sol-gel coatings.
  • corundum-blasted titanium surfaces are particularly advantageous for cement-free anchoring.
  • CoCr alloys, stainless steels, PEEK, CF / PEEK may preferably be used in the cemented version.
  • the inlay as a sliding partner can for example consist of polyethylene, ceramic, metal or PEEK, wherein the geometry of the inlay can be designed, for example, round or oval.
  • a special embodiment of the inlay towards the scapula to prevent contact with the same (impingement) is provided.
  • the inlay can project beyond the edge of the shell or can also be flush with it or even fall below it.
  • glenoid-side sliding either ceramic, plastic or metal can be used, with scapula side preferably spherical segments made of polished metal such as CoCr_XX alloys or ceramics are used.
  • FIG. 1 shows the humeral bone 1 with the humeral head 3 arranged at the end, which can be worn or damaged, for example.
  • Figure 2 again shows the humeral bone 1 after resection of the humeral head 3, whereby a mar mattersst flat surface 5 is formed, directed against the scapula and intended for the insertion of a shell or pan or the humeral implant.
  • FIG. 3 shows the humeral bone 1 in a lateral perspective, having the terminal planar surface 5.
  • a corresponding depression is first formed terminally in the humeral bone 1, which is provided schematically in Figure 4 by the reference numeral 7.
  • the shell or pan 9 is now first inserted into the recess 7, whileem Subsequently, as shown schematically in FIG. 6, the sliding component 11 is inserted into the shell or pan 9.
  • the shell or pan can be arranged without cement in the recess 7, for example by screwing, by the outer surface of the shell is designed screw-like, or by using additional bone screws, grooves and the like. Also a fixation by means of press-fit composite is conceivable.
  • FIG. 7 shows the inserted humeral implant 13, terminally in the humeral bone 1 in a schematic sectional view, that is analogous to a 3D view.
  • the implantation of the humeral implant according to FIGS. 1 to 7 represents only one possible embodiment, and other assembly variants are of course possible. As already mentioned above, the implantation can take place both by means of cement or without cement. It is essential to the invention that the humeral implant is made free of shank in order to avoid the disadvantages mentioned above with inverse shoulder prostheses.

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

L'invention concerne une prothèse de l'articulation scapulohumorale de formation inverse comprenant au moins une cavité articulaire ou un creux (9, 11) réalisés sans tige. L'implant huméral peut être constitué d'au moins deux parties, présentant une cavité ou un creux (9), ainsi qu'un composant de glissement (11) qui est inséré dans la cavité ou le creux ou qui recouvre la cavité ou le creux.
EP06790931A 2005-10-13 2006-10-03 Endoprothese de l'articulation scapulohumorale de formation inverse Withdrawn EP1933771A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH16592005 2005-10-13
PCT/CH2006/000540 WO2007041879A1 (fr) 2005-10-13 2006-10-03 Endoprothese de l'articulation scapulohumorale de formation inverse

Publications (1)

Publication Number Publication Date
EP1933771A1 true EP1933771A1 (fr) 2008-06-25

Family

ID=37401204

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06790931A Withdrawn EP1933771A1 (fr) 2005-10-13 2006-10-03 Endoprothese de l'articulation scapulohumorale de formation inverse

Country Status (3)

Country Link
US (1) US20090306782A1 (fr)
EP (1) EP1933771A1 (fr)
WO (1) WO2007041879A1 (fr)

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