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WO1999043274A1 - Coquille exterieure d'une endoprothese de l'articulation de la hanche - Google Patents

Coquille exterieure d'une endoprothese de l'articulation de la hanche Download PDF

Info

Publication number
WO1999043274A1
WO1999043274A1 PCT/CH1999/000063 CH9900063W WO9943274A1 WO 1999043274 A1 WO1999043274 A1 WO 1999043274A1 CH 9900063 W CH9900063 W CH 9900063W WO 9943274 A1 WO9943274 A1 WO 9943274A1
Authority
WO
WIPO (PCT)
Prior art keywords
outer shell
shell
axis
symmetry
hip joint
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.)
Ceased
Application number
PCT/CH1999/000063
Other languages
German (de)
English (en)
Inventor
Reinhard Graf
Martin Salzer
Gerhard Scheller
Ulrich BÜCKEN
Martin Imhof
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
Intraplant 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 Intraplant AG filed Critical Intraplant AG
Priority to JP54299999A priority Critical patent/JP2001522295A/ja
Priority to EP99902485A priority patent/EP0977525A1/fr
Publication of WO1999043274A1 publication Critical patent/WO1999043274A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

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    • 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
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    • A61F2/34—Acetabular cups
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • 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 or setting implements
    • 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
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    • 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
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    • 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
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    • A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
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    • A61F2002/30362—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 with possibility of relative movement between the protrusion and the recess
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    • A61F2002/30772—Apertures or holes, e.g. of circular cross section
    • A61F2002/30784—Plurality of holes
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    • 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
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    • 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
    • A61F2310/00179—Ceramics or ceramic-like structures

Definitions

  • the invention relates to an outer shell
  • Hip joint endoprosthesis according to the generic term of .Anspiruch 1.
  • hip joint endoprostheses in the acetabulum of the hip bone.
  • a preferably spherical recess is milled into the acetabulum with a bone cutter, into which an outer shell of the hip joint endoprosthesis is then hammered.
  • a disadvantage of known outer shells is the fact that the outer surface of the outer shell and the recess in the acetabulum often have different curvatures, so that when an outer shell is hammered into the recess, there are gaps between the outer surface and the acetabulum and the outer shell is therefore not firmly in the acetabulum can be anchored or it is difficult for the bone to grow onto the outer surface.
  • the formation of gaps can be partially avoided by driving an outer shell into the acetabulum, which has a slightly larger diameter than the recess.
  • a disadvantage of an outer shell selected in this way is the fact that a relatively high tension is generated in the acetabulum. - 2 -
  • Subclaims 2 to 9 relate to further advantageous configurations of the outer shell.
  • an outer shell for a hip joint endoprosthesis consisting of an essentially hemispherical shell with an outer surface, and an inner surface adapted to accommodate an inner shell, the outer surface at least partially by a constant radius that rotates about an axis of symmetry
  • Generating element is defined, the origin of which lies on a circular line which is concentric and perpendicular to the axis of symmetry of the outer shell and is located in the region of the equatorial plane, the elongating generating element running through the axis of symmetry.
  • the outer shell according to the invention now has an outer surface which has approximately the same radius of curvature as the bone milling cutter.
  • the enlargement of the recess in the acetabulum caused by the vibration perpendicular to the axis of rotation of the milling is taken into account in the course of the outer surface in that the course of the outer surface is defined by a generatrix, - 3 -
  • the cylinder which is defined by the said circular line and, starting from this circular line, in the axial direction of the outer shell, corresponds to side surfaces, approximately the additional volume of the acetabulum, which was removed due to the vibrating bone cutter.
  • outer shell according to the invention can be seen in the fact that its outer surface is designed to be very similar or identical to the course of the recess in the acetabulum, at least in a partial area, in particular in the area of the equator.
  • the outer shell according to the invention can therefore also be inserted into the acetabulum safely and without tilting.
  • the outer shell can have openings which are provided for the insertion of bone screws in order, if necessary, to additionally anchor the outer shell with bone screws in the acetabulum.
  • the outer shell can also have holding elements arranged on its outer surface, which protrude the outer surface in the axial direction, for example in the form of a cylinder, which penetrate into the acetabulum and additionally stabilize the position of the outer shell.
  • the outer shell is made from a biocompatible material, for example from a metallic material such as titanium or a titanium alloy.
  • Figure 1 is a side view of an outer shell.
  • Fig. La shows a detailed view of the equatorial plane as a section along the line B-B according to Fig. 1;
  • FIG. 3 shows a cross section through the outer shell according to FIG. 2 along the line C-C.
  • the side view according to FIG. 1 shows a metallic outer shell 1 for a hip joint endoprosthesis, which has an outer surface la, an axis of symmetry A, an equatorial plane id and a pole li in the region of the equator.
  • the outer surface la has a course which is defined by a generator R with a constant radius R rotating about the axis of symmetry A, the origin le of which is located on a circular line lh which is concentric and perpendicular to the axis of symmetry A, the elongated generator R always runs through the axis of symmetry A.
  • FIG. 1 a shows a top view of the equatorial plane 1 d with a section along the line BB according to FIG. 1, only the sub-region in which the circular line 1 h is located being shown.
  • the axis of symmetry A runs perpendicular to the shown equatorial plane ld through the center of the circle lh.
  • the circular line lh has a diameter of d.
  • This diameter d preferably corresponds as precisely as possible, generally approximately to the transverse movement due to the bone cutter vibrating perpendicular to the axis of rotation.
  • the circular line lh is shown in a side view in FIG. 1 and extends from this point of view from the origin le visible on the left to the origin le visible on the right.
  • the course of the equatorial plane ld is arranged in the region of the equator and can, but does not have to, coincide with the bottom edge of the outer shell 1.
  • the course of the outer surface la against the pole li can be defined by the generating line R, as shown by the dashed line.
  • the outer surface la can also be flattened against the pole li, as shown by the solid line
  • This embodiment has a lower height H than the embodiment shown in broken lines.
  • the embodiment with a lower height H has the advantage that it is ensured that the outer shell 1 does not rest on the acetabulum in the region of the pole li after being driven in, so that the outer shell without
  • the outer surface la has a nose lc which projects in the radial direction and which is the - 6 -
  • Outer shell 1 gives an additional hold after driving.
  • the outer shell 1 is designed to be rotationally and tilt-stable.
  • FIG. 2 shows a bottom view of a further embodiment of an outer shell 1, which has openings 2, into which bone screws can be arranged in the acetabulum for additional fixing of the outer shell 1.
  • the inner surface 1b has cylindrical recesses 11 which run in the direction of the axis A and which are intended for receiving a part of an inner shell projecting in a cylindrical manner in order to secure an inner shell from twisting.
  • FIG. 3 shows a cross section through the outer shell 1 according to FIG. 2 along the line C-C.
  • the outer shell 1 has an inner surface 1b which is designed to accommodate an inner shell.
  • the inner shell could be made of a plastic such as polyethylene or ceramic.
  • the outer shell 1 has a plurality of openings 2, two of which are shown in section.
  • As an additional means for securely anchoring the outer shell 1, it has at least one cylindrical anchoring part lk running in the direction of the axis A.
  • the outer surface la has the course according to the invention in the section lg. Superimposed on this course, the outer surface la, in particular also in the section lg, can have additional surface structures, as is shown, for example, by the groove-shaped section 1 /.
  • the outer surface la can also be a grid or some other
  • the configuration of the partial section 1g according to the invention is defined by a generating R rotating about an axis of symmetry A, the term
  • Axis of symmetry A primarily relates to the section lg, with respect to which axis A the section lg is designed to be axially symmetrical. This axis of symmetry A coincides with the axis A of the outer shell.
  • the entire outer shell 1 can, but need not be, axially symmetrical.
  • the outer shell 1, as shown in FIG. 3, can also be configured asymmetrically outside the section lg, which can be seen, for example, from the arrangement of the openings 2 or the anchoring part lk.
  • the outer shell 1 can be produced with a wide variety of ratios of diameter d and radius R of the outer surface la.
  • the outer surface 1 a of the outer shell 1 can be configured such that the diameter d of the circular line 1 h is less than one tenth of the radius R. Based on this ratio, the diameter d of the circular line lh can be up to five times the radius R.

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 coquille extérieure (1) d'une endoprothèse de l'articulation de la hanche, qui se présente sous la forme d'une coquille sensiblement hémisphérique comportant une surface extérieure (1a) et une surface intérieure (1b) adaptée pour loger une coquille intérieure. La surface extérieure (1a) est définie, au moins sur une section partielle (1g), par une génératrice présentant un rayon constant (R) et tournant autour d'un axe de symétrie (A), dont l'origine (1e) est placée sur un cercle (1h) s'étendant concentriquement et transversalement par rapport à l'axe de symétrie (A) de la coquille extérieure (1), qui se trouve dans la zone du plan équatorial (1d), le prolongement de cette génératrice (R) passant par l'axe de symétrie (A).
PCT/CH1999/000063 1998-02-26 1999-02-12 Coquille exterieure d'une endoprothese de l'articulation de la hanche Ceased WO1999043274A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP54299999A JP2001522295A (ja) 1998-02-26 1999-02-12 人工股関節の外殻
EP99902485A EP0977525A1 (fr) 1998-02-26 1999-02-12 Coquille exterieure d'une endoprothese de l'articulation de la hanche

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00463/98A CH692650A5 (de) 1998-02-26 1998-02-26 Aussenschale einer Hüftgelenk-Endoprothese.
CH463/98 1998-02-26

Publications (1)

Publication Number Publication Date
WO1999043274A1 true WO1999043274A1 (fr) 1999-09-02

Family

ID=4187598

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1999/000063 Ceased WO1999043274A1 (fr) 1998-02-26 1999-02-12 Coquille exterieure d'une endoprothese de l'articulation de la hanche

Country Status (5)

Country Link
EP (1) EP0977525A1 (fr)
JP (1) JP2001522295A (fr)
CH (1) CH692650A5 (fr)
TR (1) TR199902660T1 (fr)
WO (1) WO1999043274A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1125563A3 (fr) * 2000-01-27 2001-11-07 Draenert, Klaus, Prof.Dr.med. Cupule insérée à force avec propriétés d'amortissement
FR2887136A1 (fr) * 2005-06-17 2006-12-22 C2M Implants Implant cotiloidien de prothese de hanche
US8679187B2 (en) 2006-03-20 2014-03-25 Smith & Nephew, Inc. Acetabular cup assembly for multiple bearing materials
CN108836577A (zh) * 2018-07-24 2018-11-20 北京安颂科技有限公司 髋臼假体及人工髋关节

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3341723C1 (de) * 1983-11-18 1985-03-21 Protek AG, Bern Hueftgelenkspfanne
EP0149975A1 (fr) * 1984-01-11 1985-07-31 Robert Mathys Co Cuvette pour prothèse de l'articulation de la hanche
EP0270744A1 (fr) * 1986-11-10 1988-06-15 Waldemar Link (GmbH & Co.) Prothèse cotyloidienne
US4892549A (en) * 1989-01-31 1990-01-09 Osteonics Corp. Dual-radius acetabular cup component
EP0380045A1 (fr) * 1989-01-23 1990-08-01 PLUS-Endoprothetik AG Coque pour une endoprothèse d'articulation
EP0640325A1 (fr) * 1993-08-30 1995-03-01 SULZER Medizinaltechnik AG Coque acétabulaire artificielle en plusieurs parties et prothèse de l'articulation de la hanche avec une telle coque
WO1995016413A1 (fr) * 1993-12-16 1995-06-22 Endocare Ag Element acetabulaire ellipsoidal pour prothese de la hanche
DE4408527A1 (de) * 1994-03-14 1995-09-21 Gerd Hoermansdoerfer Parasphärische Hüftgelenkpfanne
WO1997016138A1 (fr) * 1995-11-02 1997-05-09 Wright Medical Technology, Inc. Prothese articulaire a faible usure
WO1997019656A1 (fr) * 1995-11-27 1997-06-05 Smith & Nephew Inc. Prothese de cupule acetabulaire

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3341723C1 (de) * 1983-11-18 1985-03-21 Protek AG, Bern Hueftgelenkspfanne
EP0149975A1 (fr) * 1984-01-11 1985-07-31 Robert Mathys Co Cuvette pour prothèse de l'articulation de la hanche
EP0270744A1 (fr) * 1986-11-10 1988-06-15 Waldemar Link (GmbH & Co.) Prothèse cotyloidienne
EP0380045A1 (fr) * 1989-01-23 1990-08-01 PLUS-Endoprothetik AG Coque pour une endoprothèse d'articulation
US4892549A (en) * 1989-01-31 1990-01-09 Osteonics Corp. Dual-radius acetabular cup component
US4892549B1 (en) * 1989-01-31 1999-10-05 Stryker Corp Dual-radius acetubular cup component
EP0640325A1 (fr) * 1993-08-30 1995-03-01 SULZER Medizinaltechnik AG Coque acétabulaire artificielle en plusieurs parties et prothèse de l'articulation de la hanche avec une telle coque
WO1995016413A1 (fr) * 1993-12-16 1995-06-22 Endocare Ag Element acetabulaire ellipsoidal pour prothese de la hanche
DE4408527A1 (de) * 1994-03-14 1995-09-21 Gerd Hoermansdoerfer Parasphärische Hüftgelenkpfanne
WO1997016138A1 (fr) * 1995-11-02 1997-05-09 Wright Medical Technology, Inc. Prothese articulaire a faible usure
WO1997019656A1 (fr) * 1995-11-27 1997-06-05 Smith & Nephew Inc. Prothese de cupule acetabulaire

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1125563A3 (fr) * 2000-01-27 2001-11-07 Draenert, Klaus, Prof.Dr.med. Cupule insérée à force avec propriétés d'amortissement
FR2887136A1 (fr) * 2005-06-17 2006-12-22 C2M Implants Implant cotiloidien de prothese de hanche
US8679187B2 (en) 2006-03-20 2014-03-25 Smith & Nephew, Inc. Acetabular cup assembly for multiple bearing materials
CN108836577A (zh) * 2018-07-24 2018-11-20 北京安颂科技有限公司 髋臼假体及人工髋关节
CN108836577B (zh) * 2018-07-24 2024-01-09 北京安颂科技有限公司 髋臼假体及人工髋关节

Also Published As

Publication number Publication date
JP2001522295A (ja) 2001-11-13
EP0977525A1 (fr) 2000-02-09
CH692650A5 (de) 2002-09-13
TR199902660T1 (xx) 2000-06-21

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