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WO1996004867A1 - Articulation artificielle, notamment articulation artificielle de la hanche humaine - Google Patents

Articulation artificielle, notamment articulation artificielle de la hanche humaine Download PDF

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Publication number
WO1996004867A1
WO1996004867A1 PCT/EP1995/003164 EP9503164W WO9604867A1 WO 1996004867 A1 WO1996004867 A1 WO 1996004867A1 EP 9503164 W EP9503164 W EP 9503164W WO 9604867 A1 WO9604867 A1 WO 9604867A1
Authority
WO
WIPO (PCT)
Prior art keywords
joint
socket
artificial
head
radii
Prior art date
Application number
PCT/EP1995/003164
Other languages
German (de)
English (en)
Inventor
Dietmar Kubein-Meesenburg
Hans NÄGERL
Peter Adam
Original Assignee
Theusner, Joachim
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
Priority claimed from DE19944428267 external-priority patent/DE4428267A1/de
Application filed by Theusner, Joachim filed Critical Theusner, Joachim
Priority to EP95929097A priority Critical patent/EP0774936A1/fr
Priority to DE19580850T priority patent/DE19580850D2/de
Priority to AU32581/95A priority patent/AU3258195A/en
Priority to JP8507009A priority patent/JPH10504212A/ja
Publication of WO1996004867A1 publication Critical patent/WO1996004867A1/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
    • A61F2/30721—Accessories
    • A61F2/30744—End caps, e.g. for closing an endoprosthetic cavity
    • 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
    • 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 for implanting artificial joints
    • A61F2/4637—Special tools for implanting artificial joints 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
    • 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
    • A61F2002/30405—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by screwing complementary threads machined on the parts themselves
    • 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
    • A61F2002/30621—Features concerning the anatomical functioning or articulation of the prosthetic joint
    • A61F2002/30649—Ball-and-socket joints
    • A61F2002/30654—Details of the concave socket
    • A61F2002/30655—Non-spherical concave inner 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
    • 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
    • A61F2002/30673—Lubricating means, e.g. synovial pocket
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2002/30934—Special articulating surfaces
    • 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
    • A61F2002/3208—Bipolar or multipolar joints, e.g. having a femoral head articulating within an intermediate acetabular shell whilst said shell articulates within the natural acetabular socket or within an artificial outer shell
    • 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
    • A61F2002/3225—Joints for the hip the diameter of the inner concave femoral head-receiving cavity of the inner acetabular shell being essentially greater than the diameter of the convex femoral head
    • 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
    • A61F2002/3401—Acetabular cups with radial apertures, e.g. radial bores for receiving fixation screws
    • A61F2002/3403—Polar aperture
    • 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
    • A61F2002/345—Acetabular cups the inner and outer (hemi)spherical surfaces of a shell, e.g. an intermediate shell, having distinct centres of rotation, both located on the centre line of the shell
    • 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
    • A61F2002/3453—Acetabular cups having a non-hemispherical convex outer surface, e.g. quadric-shaped
    • 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
    • A61F2002/3453—Acetabular cups having a non-hemispherical convex outer surface, e.g. quadric-shaped
    • A61F2002/3456—Acetabular cups having a non-hemispherical convex outer surface, e.g. quadric-shaped ellipsoidal or having a flattened polar region
    • 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
    • A61F2002/348—Additional features
    • A61F2002/3493—Spherical shell significantly greater than a hemisphere, e.g. extending over more than 200 degrees
    • 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
    • A61F2002/3611—Heads or epiphyseal parts of femur
    • A61F2002/3623—Non-spherical 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 for implanting artificial joints
    • A61F2002/4631—Special tools for implanting artificial joints 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
    • 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

Definitions

  • the present invention relates to an artificial joint for replacing in particular human joints, consisting of at least two joint parts with functional surfaces that move towards one another, namely a joint head and an articular socket, the joint having at least three degrees of freedom of movement.
  • the joint In the case of three joint parts, a joint head, a pressure distribution body and a joint socket, the joint has five degrees of freedom.
  • the object of the present invention is to increase the durability of artificial joint parts, in particular of artificial human joints.
  • the functional surfaces of the joint parts are spherical and / or toroidal and / or rotationally symmetrical and are designed in a linear force transmission area between the contacting functional surfaces in the inserted state, ie in the functional position.
  • Rotations ⁇ symmetrical means that there are contours rotated about an axis of rotation.
  • the line-shaped power transmission area can be circular, ellipsoidal, trapezoidal or else horseshoe-shaped.
  • the design of the linear force transmission area is essentially determined by the prevailing, special functional directions.
  • a linear force transmission area is obtained, for example, by contacting a spherically shaped joint surface with a toroidally shaped joint surface or two toroidally shaped joint surfaces.
  • the formation of a line-shaped force transmission area according to the invention brings advantages both with artificial joints with three and with five degrees of freedom.
  • the joint parts can be designed such that access to body fluid is achieved in the center of the joint.
  • such access to body fluid is obtained by forming a hole in the center of the socket. This allows the body's own synovial fluid to penetrate from the center into the joint space between the joint parts. This hole is advantageously circular.
  • the formation of a hole in the socket also has the advantage that after a healing phase in the hole area, the body's own connective tissue and / or cartilaginous structures arise which not only reduce the problem of friction, but also increase the stability of the socket in the pelvis.
  • the relative dimensioning of the radii of curvature of the articular surfaces at the contact point is important. This dimensioning depends on the materials used. With metal-to-metal contact, it can therefore be advantageous that the radii of curvature differ only slightly. The radius difference can be, for example, less than 2% to a few parts per thousand of the larger radius.
  • an artificial joint according to the invention is formed from an artificial joint head 1 and an artificial joint socket 2.
  • the socket 1 is the fossa and the joint head 2 is the condyle.
  • the socket 1 and the joint head 2 form a ball joint with three degrees of freedom, the pivot point of which is P.
  • the radius R x of the joint head 1 and that of the joint socket 2 are virtually the same except for a small gap.
  • a hole 3 can be formed in the joint socket 2 in such a way that the center of the hole 3 lies in the main line of action of the artificial joint in the basic joint position.
  • the main line of action is indicated by XX.
  • the joint socket is of course expanded. Since this natural expansion of the joint socket is relieved of force, because the joint force is distributed over the artificial part of the joint socket 2, lubrication is also possible from the central region of the joint, which supports the formation of a lubricating film on the entire condyle surface. Because at the same time as the wetted area of the joint head is enlarged through the hole, the area of the joint socket to be wetted is significantly reduced, and in particular the respective lubrication path limited. This can significantly reduce wear due to abrasion in the joint.
  • the size of the hole can form 1/6 to 5/6 of the socket area up to its equator, so that the opening angle a can be changed accordingly.
  • the size of the opening angle a depends on the material pairing of the materials of the joint head 1 and the joint socket 2.
  • the shape of the hole 3 is circular in the illustrated embodiment. However, the present invention is not limited to this, in particular an ellipsoidal, trapezoidal or else horseshoe-shaped hole shape can also be provided. Through this hole 3 there is also a linear force transmission area K L between the joint head
  • the joint shown in FIG. 1 is a ball joint with three degrees of freedom.
  • the present invention can also be used in a joint with five degrees of freedom, as is known from German patent application P 39 08 958.4, reference being made to this patent in its entirety.
  • the illustration in the attached FIG. 2 serves to explain this.
  • the joint shown is between the socket
  • the joint head 1 has a center of rotation M : and the socket 2 has a center of rotation M ; ,
  • the circular, convex cutting contour of the joint head 1 has the radius Ri and the concave, circular sectional contour of the joint socket 2 have the radius R 2 .
  • the pressure distribution body 4 has a thickness D on the extension of the connecting line between M x and M 2 .
  • the pressure distribution body 4 has sliding surfaces 5, 6, the radii of which correspond to those of the adjoining surfaces of the socket 2 and the joint head 1.
  • the radius R of the link axis path of the dimeric link chain with two link axes through the two rotation centers M ⁇ and M 2 is
  • R R 2 - R ⁇ - D
  • the joint socket 2 can have a hole 3 which is designed corresponding to the hole 3 in FIG. 1 and can be arranged accordingly. Furthermore, it is expedient if a hole 7 is also formed in the pressure distribution body 4.
  • This configuration of the socket 2 and the pressure distribution body 4 also lubricates the contact surfaces between the pressure distribution body 4 and the joint head from the center. This ensures a uniform formation of the lubricating film between all surfaces sliding on one another.
  • This design of the joint socket 2 and the pressure distribution body 4 also produces linear force transmission regions in the edge region of the holes between the adjacent joint parts with the reduction in pressure already described at the location of the respective force transmission and the resulting reduced material load.
  • the same parts as in Figs. 1 and 2 are provided with the same reference numerals.
  • the joint head 1 is spherical with a circular cutting contour and the radius R : in P.
  • the socket 2 is, seen mathematically, a toroid. Its axis of rotation is X-X.
  • the circular cutting contours with the centers M 21 and M 22 and the associated radii R 2: and R 22 represent mathematically the toroid-producing circle which is rotated about the ration axis XX to produce the toroid surface.
  • R 21 is therefore equal to R 22 :
  • R 2 is therefore the radius of the toroid generating circle.
  • R ⁇ ⁇ R 2 also applies.
  • R ⁇ is an outer torus radius. It is defined by the point on the toroidal surface that has the greatest distance from the axis of rotation XX.
  • the contact line K L is a circle. The associated center lies on the axis of rotation XX of the toroid.
  • the radius is R 3 .
  • ß is a cone angle to the contact radius R 3 .
  • the joint socket can contain a hole in the lower part which allows the entry of liquid and thus helps to increase the lubrication of the joint.
  • the joint surface of the socket does not necessarily have to be a torus, it can also be the concave surface of another body with rotational symmetry in the sectional view.
  • FIG. 4 shows a variant of the joint design according to FIG. 3.
  • the joint head 1 is spherical with a circular cutting contour around the pivot point P, the circular cutting contour having the radius R ⁇ around P.
  • the socket 2 represents a toroid. To generate it, the toroid-generating circle is rotated with R 2 about the axis of rotation XX.
  • two convex, circular socket contours 9, 10 with the center points M 21 and M 22 and the radius R 2 are created .
  • the contact line K L is a circle.
  • the associated center lies on the axis of rotation XX of the toroid.
  • the radius is R 3 .
  • ß is the cone angle to the contact radius R 3 .
  • the joint head 1 is toroidal and the socket 2 is spherical. Their concave, circular arc-shaped cutting contour has the center point P and the radius R 2 .
  • the toroidal joint head 1 has two circular, convex contours with the radii R 1X and R 22 , which are given by the toroid-generating circle R.
  • a hole 3 is again formed in the joint socket 2, specifically in the manner described for FIG. 1.
  • joint head 5 which is drawn in the basic position, represents a ball joint with three degrees of freedom.
  • the joint head can only rotate about the pivot point P, which in this example is simultaneously the geometric center of the socket 2 .
  • the joint head 1 instead of a toroid, another rotationally symmetrical body can be used as the joint head 1.
  • the radius difference ⁇ R (R 2 - R ⁇ ), between the radius R 2 of the spherical socket and the radius R A. of the toroidal joint head is generally small. For example, it can be less than 2% to a few parts per thousand of R 2 .
  • the articular surface of the articulated head 1 does not necessarily have to be a torus. It can also be the concave surface of another body with rotational symmetry in the sectional view.
  • the above statements apply accordingly.
  • both the joint head 1 and the socket 2 are toroidal.
  • both toroids In the basic position (FIG. 6), both toroids have the same axis of rotation XX.
  • the axis of rotation P of this joint is not stationary, as can be seen from FIGS. 6 and 7, with FIG. 7 in a bent position of the joint shows.
  • the joint head 1 shows in the sectional view two convex, circular contours with the center points M 1X and M 12 and the radii R ⁇ rt and R 12 .
  • L 2 is the coupling element between M 21 and M 22 and L x is the coupling element between M X1 and M 12 .
  • ⁇ R 2 and ⁇ R are the connecting rod members. The following applies:
  • this joint has the advantages that the linear contact areas migrate on both joint surfaces. Furthermore, a pumping action for the joint fluid is produced, and there is a stable mechanical equilibrium in the rest position (basic position) and self-stabilization when the individual flexion positions are taken.
  • Both the joint head 1 and the joint socket 2 are designed as toroidal bodies with a common axis of rotation XX in the basic position.
  • the joint socket 2 has two concave, circular contours with the center points M 21 and M 22 and the radii R 21 and R 22 in the sectional view.
  • FIG. 9 shows a variant of FIG. 6, the joint head 1 being designed like the joint head according to FIG. 6. 4 consists of two convex socket areas 9, 10 with the center points M 21 and M 22 of their circular sectional contours with the radii R 21 and R 22 , which are the same size and larger than the radii R u and R 12 .
  • This design enables the linear contact areas to migrate on the joint parts, and a pumping action for the joint fluid is achieved.
  • the joint shows a stable balance in the rest position. It the other sizes known from the above figures also apply here. It is:
  • the joint head 1 corresponds to the design in FIG. 5.
  • the design of the joint socket 2 corresponds to that in FIG. 7.
  • the radii R and R 12 are the same and smaller than the radii R 21 and R 22 of the same size.
  • FIG. 11 A further joint variant of an artificial joint according to the invention is shown in FIG. 11.
  • both the joint head 1 and the joint socket 2 are formed as toroidal bodies.
  • the joint head 1 consists of a toroid such as the joint head in FIG. 5.
  • the concave joint socket 2 represents a toroidal surface of the same type, the generating radius being larger.
  • the joint socket can in turn have a hole 3.
  • the linear contact areas move on both joint parts, and there is a pumping effect for the joint fluid.
  • FIGS. 1, 3-11 have three degrees of freedom of movement.
  • the details given for the embodiment in FIG. 3 apply to the size ratios of the contacting radii in all embodiments.
  • all ball joints can be expanded into a joint with three artificial joint parts by connecting them in series or by inserting a second joint ball. This creates a joint that has five degrees of freedom.
  • mechanical pressure stability of the pressure distribution body is always ensured when the pivot point P of the joint joint pressure joint pressure distribution body lies "above" the pivot point P ⁇ of the partial joint pressure distribution body joint head: a compression force holds the pressure distribution body mechanically stable between the joint head and joint socket .
  • FIGS. 12 and 13 show two exemplary embodiments of such a series connection.
  • FIG. 12 shows a series connection of two ball joints with "linear" force transmission consisting of the types: toroidal joint socket - spherical joint head (FIG. 3) and spherical joint socket - toroidal joint head (FIG. 5).
  • joint socket 2 is the fulcrum of the acetabular ball joint, given by the joint surfaces of the joint parts 2 and 4.
  • the joint surface of the socket 2 is toroidal.
  • the articulating surface of the pressure distribution body 4 is spherical and has the radius R 2 (corresponds to FIG. 3).
  • the articular surface of the pressure distribution body 4 articulating with the joint head 1 is spherical. Its center is ⁇ > j , the associated radio is R x .
  • the articular surface of the articular head 1 is toroidal (corresponds to FIG. 5).
  • joint part 4 can rotate around P TI .
  • Joint part 1 is taken along by this rotation, but can then additionally rotate about P j .
  • the distance R between the turning centers P :: and P- is constant and represents the chain link of the dimeric link chain. The following applies:
  • the pressure distribution body 4 has only spherical articular surfaces.
  • the contact rings K L2 and K L1 remain stationary on the joint surface of the joint socket 2 and also on that of the joint head 1 when the pressure distribution body 4 and the joint head 1 move. This has the consequence that the force transmission between the pressure distribution body 4 and the joint socket 2 can never hit a central hole in the socket.
  • a hole 3 in the joint surface of the socket has the advantage that synovial fluid can also penetrate into the joint from below. This increases the lubrication.
  • the hole can also be provided for the pressure distribution body.
  • FIG. 13 shows the connection in series of two ball joints with "linear" force transmission of the type: spherical joint socket - toroidal joint head corresponding to FIG. 5.
  • joint socket 2 pressure distribution body 4
  • joint head 1 joint socket 1
  • P XI is the fulcrum of the socket joint, given by the joint surfaces of the joint parts 2 and 4.
  • the joint surface of the socket 2 is spherical and has the radius R 2 .
  • the articulating surface of the pressure distribution body 4 is toroidal.
  • the one with the Joint head 1 articulating joint surface of the pressure distribution body 4 is spherical. Its center is P ⁇ , the associated radius is R.
  • the articular surface of the articulated head 1 is toroidal.
  • joint part 4 can rotate around P n .
  • Joint part 1 is taken along by this rotation, but can then additionally rotate about P : .
  • the distance R between the centers of rotation P n and P is constant and represents the chain link of the dimeric link chain. The following applies:
  • R R 2 - R j _ - D.
  • D is the minimum distance between the circles around P : ⁇ or P : with the radii R 2 or R :.
  • This cavity is variable in the case of elastic changes in shape under loading / unloading cycles and / or by the corresponding shaping (see FIGS. 6 to 11).
  • the variable cavity creates a suction / pumping effect for liquids that serve to lubricate the joint.
  • closure body 14 shows that it may be expedient to close the hole 3 in the socket 2 by means of a closure body 12, the closure body 12 being screwable into the hole 3, for example.
  • This closure body 12 serves to keep the socket 2 and the hole 3 closed during insertion, so that no bone cement can penetrate into the area of the hole 3, and after the bone cement has been inserted and hardened, the closure body 12 is removed from the region Steering pan 3 unscrewed so that it then hole 3 releases.
  • the closure body 12 can also serve as a positioning aid when inserting the socket.

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

Une articulation artificielle sert surtout à remplacer des articulations humaines. L'articulation artificielle comprend au moins deux parties avec des surfaces fonctionnelles mobiles les unes par rapport aux autres. Les surfaces fonctionnelles des parties (1, 2) de l'articulation sont sphériques, toroïdales et/ou symétriques par rapport à un point. Dans leur position d'utilisation ou de fonctionnement, une zone de transmission linéaire de forces KL se forme entre les parties (1, 2) de l'articulation.
PCT/EP1995/003164 1994-08-10 1995-08-09 Articulation artificielle, notamment articulation artificielle de la hanche humaine WO1996004867A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP95929097A EP0774936A1 (fr) 1994-08-10 1995-08-09 Articulation artificielle, notamment articulation artificielle de la hanche humaine
DE19580850T DE19580850D2 (de) 1994-08-10 1995-08-09 Künstliches Gelenk, insbesondere künstliches menschliches Hüftgelenk
AU32581/95A AU3258195A (en) 1994-08-10 1995-08-09 Artificial joint, in particular artificial human hip joint
JP8507009A JPH10504212A (ja) 1994-08-10 1995-08-09 人工関節、特に人工のヒト用股関節

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4428290A DE4428290A1 (de) 1994-08-10 1994-08-10 Künstliches Gelenk, insbesondere künstliches menschliches Hüftgelenk mit Gelenkschmierung
DEP4428290.7 1994-08-10
DEP4428267.2 1994-08-10
DE19944428267 DE4428267A1 (de) 1994-08-10 1994-08-10 Künstliches Gelenk, insbesondere künstliches menschliches Hüftgelenk

Publications (1)

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WO1996004867A1 true WO1996004867A1 (fr) 1996-02-22

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PCT/EP1995/003164 WO1996004867A1 (fr) 1994-08-10 1995-08-09 Articulation artificielle, notamment articulation artificielle de la hanche humaine

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EP (1) EP0774936A1 (fr)
JP (1) JPH10504212A (fr)
AU (1) AU3258195A (fr)
DE (2) DE4428290A1 (fr)
WO (1) WO1996004867A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998041172A1 (fr) * 1997-03-15 1998-09-24 Theusner, Joachim Condyle artificiel pour articulation de la hanche humaine
US6610097B2 (en) 2000-03-15 2003-08-26 Depuy Orthopaedics, Inc. Prosthetic cup assembly which includes components possessing self-locking taper and associated method
DE10304102A1 (de) * 2003-01-31 2004-08-12 Ceram Tec Ag Innovative Ceramic Engineering Hüftgelenkprothese
US7326253B2 (en) 2001-11-16 2008-02-05 Depuy Products, Inc. Prosthetic cup assembly having increased assembly congruency
US8323346B2 (en) 2006-11-17 2012-12-04 Scyon Orthopaedics Ag Wear-reducing geometry of articulations in total joint replacements
US9005307B2 (en) 2006-11-07 2015-04-14 Biomedflex, Llc Prosthetic ball-and-socket joint
US9005306B2 (en) 2006-11-07 2015-04-14 Biomedflex, Llc Medical Implants With Compliant Wear-Resistant Surfaces
US9107754B2 (en) 2006-11-07 2015-08-18 Biomedflex, Llc Prosthetic joint assembly and prosthetic joint member
CN105105875A (zh) * 2015-08-04 2015-12-02 西安交通大学 一种具有内生长功能的仿生人工髋关节
US9445903B2 (en) 2008-11-24 2016-09-20 Biomet Manufacturing, Llc Multi-bearing acetabular prosthesis
US9445904B2 (en) 2009-07-14 2016-09-20 Biomet Manufacturing, Llc Multiple bearing acetabular prosthesis
US9566157B2 (en) 2006-11-07 2017-02-14 Biomedflex, Llc Three-member prosthetic joint
CN112040910A (zh) * 2018-05-07 2020-12-04 陶瓷技术有限责任公司 用于具有球形的滑动搭配件的滑动配对件的插入件

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US5928285A (en) * 1997-05-30 1999-07-27 Bristol-Myers Squibb Co. Orthopaedic implant having an articulating surface with a conforming and translational surface
DE19915814A1 (de) * 1999-04-08 2000-10-12 Ceramtec Ag Gelenk-Endoprothese mit verschleißarmer Gleitpaarung
GB0029318D0 (en) 2000-12-01 2001-01-17 Depuy Int Ltd An orthopaedic joint prosthesis
DE10343889B3 (de) * 2003-09-19 2005-02-03 Hjs Gelenk System Gmbh Künstliches Gelenk
DE10360390B4 (de) 2003-12-22 2006-03-23 Martin Imhof Gelenkpfanne für eine Hüftendoprothese
US20050261776A1 (en) * 2004-05-19 2005-11-24 Howmedica Osteonics Corp. Prosthetic joint with annular contact bearing surface
DE102007031672B4 (de) * 2006-08-04 2018-07-26 Ceramtec Gmbh Kugelkopf mit Abflachungen zur Vermeidung von Trockenlauf eines künstlichen Hüftgelenkes
JP2008054809A (ja) * 2006-08-30 2008-03-13 Hamada:Kk 人工関節における摺動接触面の構造
US8715364B2 (en) 2007-02-05 2014-05-06 DePuy Synthes Products, LLC Aspheric hip bearing couple
US7985262B2 (en) 2007-12-28 2011-07-26 Depuy Products, Inc. Aspheric hip bearing couple
CA3093488A1 (fr) * 2018-05-07 2019-11-14 Ceramtec Gmbh Implant permettant un appariement coulissant comportant un partenaire de coulissement spherique
DE102021116330A1 (de) 2021-06-24 2022-12-29 mechamed GmbH Gelenkprothese
KR102621405B1 (ko) * 2021-12-10 2024-01-05 이부락 인공고관절
KR102621402B1 (ko) * 2021-12-10 2024-01-05 이부락 인공고관절
KR102621407B1 (ko) * 2021-12-10 2024-01-05 이부락 인공고관절

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FR2134170A1 (fr) * 1971-04-23 1972-12-08 Benoist Girard & Cie
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WO1986001394A1 (fr) * 1984-08-28 1986-03-13 Rob. Mathys Co. Cavite articulaire artificielle de la hanche avec support hydrostatique de la tete
EP0226762A1 (fr) * 1985-11-18 1987-07-01 GebràœDer Sulzer Aktiengesellschaft Cavité glénoide artificielle
EP0302850A2 (fr) * 1987-07-09 1989-02-08 Menschik, Alfred, Dr.med. Articulation de hanche artificielle
DE3840468A1 (de) * 1988-12-01 1990-06-07 Lieke Michael Endoprothesenkomponenten fuer eine hueftgelenkspfanne
WO1990011062A1 (fr) * 1989-03-18 1990-10-04 Kubein Meesenburg Dietmar Articulation artificielle
EP0444381A1 (fr) * 1990-03-01 1991-09-04 GebràœDer Sulzer Aktiengesellschaft Prothèse d'acétabule métallique destinée à être fixée sans ciment
FR2664809A1 (fr) * 1990-07-19 1992-01-24 Erato Ste Civile Systeme de prothese d'epaule.
DE4140838C1 (fr) * 1991-12-11 1993-05-06 Dietmar Prof. Dr. 3350 Kreiensen De Kubein-Meesenburg
EP0648478A2 (fr) * 1993-10-18 1995-04-19 Bristol-Myers Squibb Company Coque acétabulaire non sphérique pour remplacement total de la hanche

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Publication number Priority date Publication date Assignee Title
US3510883A (en) * 1967-10-30 1970-05-12 Robert F Cathcart Joint prosthesis
FR2134170A1 (fr) * 1971-04-23 1972-12-08 Benoist Girard & Cie
DE2524923B1 (de) * 1975-06-03 1976-11-04 Sulzer Ag Hueftgelenkprothese
DE2742464A1 (de) * 1977-09-21 1979-03-22 Pfaudler Werke Ag Koerpergelenksendoprothese
FR2413078A1 (fr) * 1978-01-03 1979-07-27 Serole Michelle Prothese de hanche a comportement physiologique et cupule autostable
WO1986001394A1 (fr) * 1984-08-28 1986-03-13 Rob. Mathys Co. Cavite articulaire artificielle de la hanche avec support hydrostatique de la tete
EP0226762A1 (fr) * 1985-11-18 1987-07-01 GebràœDer Sulzer Aktiengesellschaft Cavité glénoide artificielle
EP0302850A2 (fr) * 1987-07-09 1989-02-08 Menschik, Alfred, Dr.med. Articulation de hanche artificielle
DE3840468A1 (de) * 1988-12-01 1990-06-07 Lieke Michael Endoprothesenkomponenten fuer eine hueftgelenkspfanne
WO1990011062A1 (fr) * 1989-03-18 1990-10-04 Kubein Meesenburg Dietmar Articulation artificielle
EP0444381A1 (fr) * 1990-03-01 1991-09-04 GebràœDer Sulzer Aktiengesellschaft Prothèse d'acétabule métallique destinée à être fixée sans ciment
FR2664809A1 (fr) * 1990-07-19 1992-01-24 Erato Ste Civile Systeme de prothese d'epaule.
DE4140838C1 (fr) * 1991-12-11 1993-05-06 Dietmar Prof. Dr. 3350 Kreiensen De Kubein-Meesenburg
EP0648478A2 (fr) * 1993-10-18 1995-04-19 Bristol-Myers Squibb Company Coque acétabulaire non sphérique pour remplacement total de la hanche

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998041172A1 (fr) * 1997-03-15 1998-09-24 Theusner, Joachim Condyle artificiel pour articulation de la hanche humaine
US6610097B2 (en) 2000-03-15 2003-08-26 Depuy Orthopaedics, Inc. Prosthetic cup assembly which includes components possessing self-locking taper and associated method
US7326253B2 (en) 2001-11-16 2008-02-05 Depuy Products, Inc. Prosthetic cup assembly having increased assembly congruency
DE10304102A1 (de) * 2003-01-31 2004-08-12 Ceram Tec Ag Innovative Ceramic Engineering Hüftgelenkprothese
US9005306B2 (en) 2006-11-07 2015-04-14 Biomedflex, Llc Medical Implants With Compliant Wear-Resistant Surfaces
US9005307B2 (en) 2006-11-07 2015-04-14 Biomedflex, Llc Prosthetic ball-and-socket joint
US9107754B2 (en) 2006-11-07 2015-08-18 Biomedflex, Llc Prosthetic joint assembly and prosthetic joint member
US9566157B2 (en) 2006-11-07 2017-02-14 Biomedflex, Llc Three-member prosthetic joint
US8323346B2 (en) 2006-11-17 2012-12-04 Scyon Orthopaedics Ag Wear-reducing geometry of articulations in total joint replacements
US9872771B2 (en) 2006-11-17 2018-01-23 Scyon Orthopaedics Ag Wear-reducing geometry of articulations in total joint replacements
US9445903B2 (en) 2008-11-24 2016-09-20 Biomet Manufacturing, Llc Multi-bearing acetabular prosthesis
US9445904B2 (en) 2009-07-14 2016-09-20 Biomet Manufacturing, Llc Multiple bearing acetabular prosthesis
CN105105875A (zh) * 2015-08-04 2015-12-02 西安交通大学 一种具有内生长功能的仿生人工髋关节
CN112040910A (zh) * 2018-05-07 2020-12-04 陶瓷技术有限责任公司 用于具有球形的滑动搭配件的滑动配对件的插入件

Also Published As

Publication number Publication date
EP0774936A1 (fr) 1997-05-28
JPH10504212A (ja) 1998-04-28
AU3258195A (en) 1996-03-07
DE19580850D2 (de) 1998-04-02
DE4428290A1 (de) 1996-02-15

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