WO2000004885A2 - Systeme de prothese d'articulation - Google Patents

Systeme de prothese d'articulation Download PDF

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Publication number
WO2000004885A2
WO2000004885A2 PCT/EP1999/005196 EP9905196W WO0004885A2 WO 2000004885 A2 WO2000004885 A2 WO 2000004885A2 EP 9905196 W EP9905196 W EP 9905196W WO 0004885 A2 WO0004885 A2 WO 0004885A2
Authority
WO
WIPO (PCT)
Prior art keywords
adapter
joint
prosthesis system
tool
guide sleeve
Prior art date
Application number
PCT/EP1999/005196
Other languages
German (de)
English (en)
Other versions
WO2000004885A3 (fr
WO2000004885A8 (fr
Inventor
Emmanuel Anapliotis
Original Assignee
Merete Management Gmbh
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 Merete Management Gmbh filed Critical Merete Management Gmbh
Priority to EP99942795A priority Critical patent/EP1098612A2/fr
Priority to AU56189/99A priority patent/AU5618999A/en
Publication of WO2000004885A2 publication Critical patent/WO2000004885A2/fr
Publication of WO2000004885A8 publication Critical patent/WO2000004885A8/fr
Publication of WO2000004885A3 publication Critical patent/WO2000004885A3/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/40—Joints for shoulders
    • A61F2/4014—Humeral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic humeral shafts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4637—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
    • 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
    • A61F2002/30331—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
    • A61F2002/30339—Double cones, i.e. connecting element having two conical connections, one at each of its opposite ends
    • 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
    • A61F2002/30474—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using an intermediate sleeve interposed between both prosthetic parts to be coupled
    • 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
    • A61F2002/30593—Special structural features of bone or joint prostheses not otherwise provided for hollow
    • 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
    • A61F2002/30772—Apertures or holes, e.g. of circular cross section
    • A61F2002/30777—Oblong apertures
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/365—Connections of heads to necks
    • 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
    • A61F2002/4037—Connections of heads to necks
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4637—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis
    • A61F2002/4641—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis for disconnecting
    • 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
    • A61F2002/4681—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor by applying mechanical shocks, e.g. by hammering
    • 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

Definitions

  • the invention relates to a joint prosthesis system with a prosthesis shaft having a conical neck, with a joint ball which has a conically shaped receptacle, with a cup-like adapter which can be inserted between the prosthesis shaft and joint ball and has an opening in its base, the outer contour of the inner contour of the joint ball holder and whose inner contour corresponds to the outer contour of the cone-shaped neck and with a shaft-shaped tool for releasing the adapter from the neck of the prosthesis shaft or from the joint ball receptacle.
  • a joint prosthesis system which comprises a prosthesis socket with a conical neck, an articulated ball with a conically shaped receptacle, a cup-like intermediate piece which can be used between the prosthesis socket and the jointed ball and a tool for releasing the Has intermediate piece from the neck of the prosthesis shaft or from the joint ball.
  • the intermediate piece is essentially cup-shaped, its outer contour corresponding to the inner contour of the joint ball receptacle and its inner contour corresponding to the outer contour of the conical neck.
  • a continuous threaded bore is provided, into which the shank of the tool, which is provided with an external thread at at least one end, can be screwed.
  • a handle is provided at the other end of the tool shank to initiate the appropriate torque.
  • the length of the external thread of the tool shank is greater than the length of the threaded bore plus the distance of the end face of the intermediate element from the end face of the prosthesis neck opposite this or the inner surface of the joint ball, so that the shank has a force effect for loosening the screw by screwing it into the end face of the intermediate piece Intermediate piece triggers.
  • the known solution has the disadvantage that the threaded shaft provided for generating the force releasing the adapter-shaped intermediate piece can be connected to the adapter to be released only with difficulty under operating conditions.
  • the handling of the tool is very uncomfortable, since in particular no elements are provided with which the tool can be held in an optimal position with respect to the introduction of force into the respective prosthesis part.
  • the invention is therefore based on the object of specifying a joint prosthesis system of the type mentioned at the beginning, the tool of which is designed in such a way that it is particularly convenient under operating conditions to initiate a reaction force required to release the prosthesis parts handle.
  • a joint prosthesis system of the type mentioned in which the tool has a two-part shaft, at the tip of a first and a second, through the opening at the bottom of the adapter into a space between the adapter base and neck of the prosthesis shaft or Means which can be inserted into the adapter base and the joint ball receptacle are provided such that an axial tensile or compressive force component acting on the inside or outside of the adapter base can be generated when the shaft parts move relative to one another.
  • the invention includes the finding that the manageability of a surgical tool for releasing an adapter from parts of a hip or shoulder joint prosthesis under operating conditions can be considerably improved if the required positive and positive connection between the tool and the adapter is quick and essentially can be produced by a handle.
  • a tool with a two-part shaft is provided for the prosthesis system.
  • the tool shaft has a hollow cylindrical guide sleeve as the first shaft part and a cylindrical mandrel as the second shaft part, which completely penetrates the guide sleeve and is arranged to be movable in the axial direction relative to the guide sleeve. If the shaft tip is brought into active contact with interconnected prosthesis parts of the joint prosthesis system, this relative movement can generate force effects on the shaft tip in a simple and at the same time advantageous manner which can be used to loosen the interconnected prosthesis parts.
  • the tool which has a two-part shaft, is inserted with the shaft tip through an opening in the bottom of the adapter into a free space between the adapter base and neck of the prosthesis socket or adapter base and joint ball receptacle, so that a relative movement between the shaft parts results in a first part of the shaft of the Tool provided means is supported on the prosthesis socket or in the joint ball receptacle and by a second means provided on the other shaft part of the tool an axial pull, which acts on the inside or outside of the adapter base and releases the adapter from the prosthesis socket or the joint ball - or pressure force component is effective.
  • the tool a handle on which the guide sleeve is secured against rotation and secured against axial displacement.
  • the mandrel which penetrates both the guide sleeve and the grip piece axially, has at its end facing away from the shaft tip a handle, preferably designed as a toggle, in order to rotate the mandrel with relatively little effort and at the same time to be able to introduce the torque into the corresponding arrangement , which generates the force required to loosen the prosthesis parts.
  • the tip of the dome is provided as the first means, which is supported on the neck of the prosthesis socket or in the joint ball receptacle.
  • the guide sleeve preferably has two peg-shaped projections which extend outward in the radial direction and form the second means. The projections, in cooperation with the mandrel tip, ensure a non-positive and positive connection of the guide sleeve to the adapter base, which is necessary for introducing the force component that releases the connected prosthesis parts.
  • the opening provided in the bottom of the adapter is designed as a bore which is widened to the edge of the bottom by two essentially slot-shaped recesses arranged diametrically opposite one another. Its shape and size essentially correspond to the cross-sectional area of the guide sleeve in the area of the projections.
  • the peg-shaped projections at the end of the guide sleeve can be brought into engagement by a 90 ° rotation of the tool about its longitudinal axis with the inside or outside surface areas next to the opening in the adapter base, thereby blocking a movement of the tool opposite to the direction of insertion of the shaft tip is.
  • a drive which, in accordance with the preferred embodiment of the invention, is formed by coupling two threads.
  • the guide sleeve has a section with an internal thread, which is in operative engagement with an external thread, which is provided on a correspondingly long section of the dome.
  • the adapter of the prosthesis socket engages on the inside or outside of the adapter base or generated from the joint ball tensile or compressive force component.
  • the tool can be easily held in a position in which the axis of the joint prosthesis system is aligned with the longitudinal axis of the tool.
  • the handle and toggle ensure easy handling of the tool when force is applied to loosen the prosthesis parts.
  • the cup-shaped adapter has an annular bead on the outside.
  • the annular bead on the rim of the cup which is preferably produced by flaring the wall of the cup-shaped adapter, makes it easier to detach the adapter from the prosthesis socket using a conventional knockout tool. This is necessary, for example, if the joint ball is particularly tight and cannot be separated from the adapter by using such a striking tool or if the striking tool cannot be used for medical reasons.
  • an adapter which has an eccentrically arranged receiving area for the conical neck of the shaft part.
  • FIG. 4 shows the view of a section along the line A ... A according to FIG. 2,
  • Fig. 7 shows a further embodiment of the joint prosthesis system according to the invention in partial sectional view.
  • the tool 1 shown in FIGS. 1 and 2 in a longitudinal sectional view or in a side view of a joint prosthesis system having differently dimensioned joint balls, prosthesis shafts and adapters is required to loosen an adapter which, while compensating for length tolerances for a connection between the joint ball and the cone-shaped neck of the prosthesis stem is inserted (compare positions 20, 30, 40, 41, in Figures 3, 4, 5, 5a, 6 and 6a).
  • the tool 1 has a handle 2 made of plastic, in which a hollow cylindrical guide sleeve 3 is inserted.
  • a cylindrical mandrel 5 is inserted into the guide sleeve, which is connected to the handle 2 in a manner secured against rotation and secured against axial displacement, which can be moved in the axial direction relative to the guide sleeve 3.
  • a threaded coupling 6 is provided, the guide sleeve 3 having a section which has an internal thread 7 and which engages with a section of the mandrel 5 which has an external thread 8.
  • the free end 10 of the guide sleeve 3 carries two pins 1 2 of the same size on the outside, which extend radially outwards and are arranged diametrically to one another.
  • the pin ends 1 3 are rounded.
  • the cross-sectional area of the guide sleeve 3 in the region of the pins 1 2 thus has the same shape as the opening 21 in the bottom 22 of the adapter 20 of the joint prosthesis system according to the invention shown in FIGS. 3 and 4 in a longitudinal sectional view or plan view.
  • the opening 21 is composed of a circular bore 23, the diameter of which corresponds to the outer diameter of the free end 10 of the guide sleeve 3 of the tool 1, and two equally large, diametrically opposed recesses 24, each of which has a radial slot parallel to the boundary edges of the bore 23 extend outwards to the wall 25 of the adapter 20.
  • the tool 1 can be guided with the free end 10 of its guide sleeve for releasing the adapter 20 stuck in the joint ball 30 after the joint ball 30 has been removed from the conical neck 41 of the prosthesis shaft 40 of the joint prosthesis system 50 by mechanical knocking out is, as shown in Figures 5 and 5a in partial sectional view.
  • the annular bead 26 on the outside of the rim which is preferably produced on the outside by flanging the wall 25 of the cup-shaped adapter 20, facilitates the detachment of the adapter from the prosthesis socket using a conventional removal tool. This is necessary, for example, if the joint ball is particularly tight and cannot be separated from the adapter by using such a striking tool.
  • the opening 21 in the adapter base has a certain excess in relation to the dimensions of the free end 10 of the guide sleeve 3.
  • FIGS. 6 and 6a show a partial sectional view of a joint prosthesis system 50 'or a prosthesis shaft 40' separated from the joint ball 30 ', on the conical neck 41' of which an adapter 20 'to be released by the tool 1 is seated.
  • the two-part tip of the shaft of the tool 1 formed from the guide sleeve 3 and the mandrel 5 is pushed so far through the opening 21' in the bottom 22 'of the adapter that both the pins 1 2 are at the free end of the guide sleeve 3 and the tip 9 of the mandrel 5 are located within the free space 31 'between the neck 41' of the prosthesis socket 40 'and the bottom 22' of the adapter 20 '.
  • the pins 12 are located under the areas 22.3' and 22.4 'of the inside of the adapter base 22 '.
  • a sufficiently large torque can be introduced into the arrangement by the rotary movement of the mandrel 5 via the toggle 14 at the mandrel end 1 5 protruding from the handle 2 of the tool 1 in order to release the adapter 20 from the neck of the stem prosthesis 40 '. generate the required tractive force.
  • the tool 1 can be comfortably held by the handle 2 in the position in which the longitudinal axis of the tool is aligned with the longitudinal axis 11 of the prosthesis system 50 or 50 '.
  • FIG. 7 shows, in a partial sectional illustration, a shaft part 40 ′′ separated from the joint ball for a shoulder joint, on whose conical neck 41 ′′ an adapter 20 ′′ to be released by the tool 1 is seated.
  • the adapter 20 has an eccentrically arranged receiving area for the conical neck of the shaft part.
  • the longitudinal axis 11 of the tool 1 therefore does not coincide with the longitudinal axis 11" of the adapter 20 ".
  • the opening 21 "in the adapter base 22" is designed as shown in FIG. 4, so that a force similar to that in FIG. 4 can be generated by the tool 1 inserted into the free space 31 "between the adapter base and the shaft part on the base portions 22.3” and 22.4 " the explanations for Figures 5, 5a, 6 and 6a explained.
  • the embodiment of the invention is not limited to the preferred exemplary embodiments specified above. Rather, a number of variants are conceivable which make use of the solution shown, even in the case of fundamentally different types.

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Transplantation (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Prostheses (AREA)

Abstract

L'invention concerne un système de prothèse d'articulation (50) comprenant une tige de prothèse (40), une rotule (30), un adaptateur (20) de type godet, insérable entre la tige et la rotule et dont le fond (22) présente un orifice (21), et un outil (1) en forme de tige qui permet de détacher l'adaptateur du cou de la tige de prothèse ou de la calotte réceptrice de la rotule. L'outil (1) présente une tige qui est composée de deux parties (3, 5) et dont le sommet est pourvu d'un premier et d'un deuxième moyen (9, 12) de telle façon que lors d'un mouvement relatif des éléments tiges, une composante d'effort de traction ou de compression axiale peut être produite, cette composante saisissant le côté interne ou externe (22.1, 22.2) du fond de l'adaptateur et détachant l'adaptateur (20).
PCT/EP1999/005196 1998-07-21 1999-07-20 Systeme de prothese d'articulation WO2000004885A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP99942795A EP1098612A2 (fr) 1998-07-21 1999-07-20 Systeme de prothese d'articulation
AU56189/99A AU5618999A (en) 1998-07-21 1999-07-20 Joint prosthesis system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833791.4 1998-07-21
DE19833791A DE19833791A1 (de) 1998-07-21 1998-07-21 Gelenkprothesen-System

Publications (3)

Publication Number Publication Date
WO2000004885A2 true WO2000004885A2 (fr) 2000-02-03
WO2000004885A8 WO2000004885A8 (fr) 2000-03-30
WO2000004885A3 WO2000004885A3 (fr) 2000-05-04

Family

ID=7875480

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/005196 WO2000004885A2 (fr) 1998-07-21 1999-07-20 Systeme de prothese d'articulation

Country Status (4)

Country Link
EP (1) EP1098612A2 (fr)
AU (1) AU5618999A (fr)
DE (1) DE19833791A1 (fr)
WO (1) WO2000004885A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9056021B2 (en) 2006-07-05 2015-06-16 Smith & Nephew Plc Separation device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUD20020173A1 (it) * 2002-08-05 2004-02-06 Lima Lto Spa Protesi femorale per l'articolazione dell'anca.
DE10335442A1 (de) * 2003-07-31 2005-02-24 Merete Medical Gmbh Vorrichtung zum Ermitteln der Endpositionen beim Implantieren von Endoprothesen
JP2007513671A (ja) * 2003-12-12 2007-05-31 マリアサル インヴェストメント エヌ．ヴィ． 取り外しが容易な人工股関節用のネック及びステム

Citations (1)

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EP0498518A1 (fr) 1991-02-08 1992-08-12 BIOMET Deutschland GmbH Système pour une prothèse d'articulation

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US4100626A (en) * 1977-04-29 1978-07-18 Ontario Research Foundation Wrist implant apparatus
US4834757A (en) * 1987-01-22 1989-05-30 Brantigan John W Prosthetic implant
US4865609A (en) * 1988-03-02 1989-09-12 Bioconcepts, Inc. Modular joint prosthesis assembly and method of removing
US5362311A (en) * 1990-01-05 1994-11-08 Kyocera Corporation Artificial hip joint
DE9103574U1 (de) * 1991-03-20 1992-04-23 Effner GmbH, 1000 Berlin Bausatz für eine Hüftgelenkprothese
US5885299A (en) * 1994-09-15 1999-03-23 Surgical Dynamics, Inc. Apparatus and method for implant insertion
US5858020A (en) * 1995-12-05 1999-01-12 Metagen, Llc Modular prosthesis

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
EP0498518A1 (fr) 1991-02-08 1992-08-12 BIOMET Deutschland GmbH Système pour une prothèse d'articulation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9056021B2 (en) 2006-07-05 2015-06-16 Smith & Nephew Plc Separation device

Also Published As

Publication number Publication date
DE19833791A1 (de) 2000-01-27
WO2000004885A3 (fr) 2000-05-04
AU5618999A (en) 2000-02-14
EP1098612A2 (fr) 2001-05-16
WO2000004885A8 (fr) 2000-03-30

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