WO1999012499A1 - Element prothetique - Google Patents

Element prothetique Download PDF

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Publication number
WO1999012499A1
WO1999012499A1 PCT/EP1997/004825 EP9704825W WO9912499A1 WO 1999012499 A1 WO1999012499 A1 WO 1999012499A1 EP 9704825 W EP9704825 W EP 9704825W WO 9912499 A1 WO9912499 A1 WO 9912499A1
Authority
WO
WIPO (PCT)
Prior art keywords
anchoring
shaft
prosthesis part
support plate
prosthesis
Prior art date
Application number
PCT/EP1997/004825
Other languages
German (de)
English (en)
Inventor
Franz Copf
Srecko Herman
Wolfgang KÜSSWETTER
Original Assignee
Franz Copf
Srecko Herman
Kuesswetter Wolfgang
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 to DE19610729A priority Critical patent/DE19610729A1/de
Application filed by Franz Copf, Srecko Herman, Kuesswetter Wolfgang filed Critical Franz Copf
Priority to EP97919038A priority patent/EP1028674A1/fr
Priority to PCT/EP1997/004825 priority patent/WO1999012499A1/fr
Publication of WO1999012499A1 publication Critical patent/WO1999012499A1/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
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    • A61F2/32—Joints for the hip
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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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    • A61F2/367—Proximal or metaphyseal parts of shafts
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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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    • A61F2/3676—Distal or diaphyseal parts of shafts
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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
    • A61F2/02—Prostheses implantable into the body
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    • A61F2/02—Prostheses implantable into the body
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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
    • A61F2/02—Prostheses implantable into the body
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    • 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
    • A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
    • A61F2002/30327—The prosthesis having different structural features at different locations within the same prosthesis differing in diameter
    • A—HUMAN NECESSITIES
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    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
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    • 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
    • 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
    • A61F2230/0006—Rounded shapes, e.g. with rounded corners circular
    • 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0017—Angular shapes
    • A61F2230/0026—Angular shapes trapezoidal
    • 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0063—Three-dimensional shapes
    • A61F2230/0086—Pyramidal, tetrahedral, or wedge-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
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0039—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in diameter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00389—The prosthesis being coated or covered with a particular material
    • A61F2310/00952—Coating, pre-coating or prosthesis-covering structure made of bone cement, e.g. pre-applied PMMA cement mantle

Definitions

  • the invention relates to a prosthesis part for implanting into the end of a femur adjacent to the hip joint according to the preamble of claim 1.
  • Such so-called stem prostheses essentially have the shape of a slim cone with a curved cone axis. They are glued to the corticalis of a previously prepared bone end using a cement.
  • cementless implantable prostheses including those with an anchoring cage formed by anchoring pillars, in which cancellous bone can grow after implantation (cf. DE 37 07 518 AI).
  • the conventional cemented stem prostheses can be rotated slightly in the circumferential direction due to their locally circular cross section. For some applications, it would be advantageous to have a certain form fit between the end of the bone
  • the invention provides a prosthesis part with the features specified in claim 1.
  • the prosthesis according to the invention has an essentially quadrangular cross-section in the anchoring shaft, and the recess in the bone end is prepared with a complementary quadrilateral. angular cross-section, you have a certain form fit between bone material and prosthesis part.
  • FIG. 1 a side view of a prosthesis part according to the invention
  • FIG. 2 shows a view of the prosthesis part shown in FIG. 1 from the left;
  • FIG. 3 a view of the prosthesis part shown in FIG. 1 from the right;
  • FIG. 4 a top view of the prosthesis part according to FIG. 1;
  • Figure 5 a plan view of the prosthesis part of Figure 1 from below;
  • FIG. 6 a view similar to FIG. 1 of a cement-free implantable prosthesis part that has the same outer contour.
  • 10 denotes a total of a prosthesis part which can be fastened in the upper end section of a femur 12 using cement.
  • the surgeon saws off the joint ball and the adjacent area of the femur (transversely), parts of the greater trochanter remain.
  • a recess 14 is obtained.
  • the prosthesis part 10 has a support plate 16 which closes the upper end of the femur 12 again after the prosthesis part 10 has been cemented in place.
  • a mounting pin 18 for a joint ball 20 is cast onto the support plate 16, which is only indicated by dashed lines.
  • An anchoring shaft 22 is cast onto the underside of the support plate 16. Roughly speaking, this has the shape of a curved and partially twisted pyramid with a substantially trapezoidal cross section in one section, a substantially rectangular cross section in another section and finally a circle-like cross section near the end.
  • Various axially spaced cross-sectional areas 24 are shown in the figures. As can be seen from the drawing, the cross-sectional areas 24 have rounded corners, the radius of the corners increasing towards the free end of the anchoring shaft 22, so that the lower end of the anchoring shaft has a substantially circular cross section.
  • the support plate 16 has a plate section 26 which rises at an angle of approximately 60, and this is connected to the side surface of the anchoring shaft 22 on the left in FIG. 1 by a material web 28, the edge contour of which follows the course of the trochanter minor is adjusted.
  • a bore 30 runs up to the support plate 16 and opens into this out. Liquid located in the recess 14 can escape through this bore when the prosthesis part 10 is pushed into the recess 14.
  • the side surface 36 of the anchoring shaft 22 on the right in FIG. 3 has a gentler concave indentation 38 which extends essentially over two thirds of the side surface 36. This takes good account of the standard geometry of the femur.
  • edges of the anchoring shaft 22 are broken by rounded bevels 40, the edges of the material web 28 by rounded bevels 42.
  • the implantation of the prosthesis part 10 described above is carried out in such a way that the femur 12 is prepared as described above, then the anchoring shaft 22 is coated with cement and the anchoring shaft 22 is then inserted into the recess 14 of the femur 12.
  • the prosthesis part 10 shown in FIGS. 1-5 has the same clear outer contour as a prosthesis part 44 shown in FIG. 6.
  • those parts which correspond to parts already described are again provided with the same reference numerals. These parts need not be described again in detail below.
  • the anchoring shaft 22 is now in the upper section formed as a cage structure 46.
  • the edges of the lower section of the anchoring shaft 22 continue into anchoring pillars 48, 50, 52, 54, the upper ends of which are cast onto the support plate 16.
  • the edges of the material web 28 are simulated by further anchoring pillars 56, 58.
  • further anchoring pillars are arranged transversely in the transverse direction, by means of which the various anchoring pillars are stiffened and the interior of the cage structure 46 is subdivided into subspaces of approximately the same size.
  • Three of these additional anchoring pillars are provided with the reference symbols 60, 62, 64.
  • the anchoring pillars 48-64 each have a core 66 which carries axially spaced anchoring collars 68.
  • the main anchoring posts 48-58 have approximately the following dimensions: core diameter approximately 2.0
  • the additional anchoring pillars 60, 62, 64 arranged in the interior of the space outlined by the main anchoring pillars can be somewhat smaller.
  • Typical dimensions for these secondary anchoring pillars are: core diameter about 1.5 - 3 mm, diameter of the anchoring collars about 0.6 - 1.2 mm larger than the core diameter, axial dimension of the anchoring collars about 0.5 - 1 mm, distance of Anchoring collars about 2 - 4 mm.
  • the prosthesis part shown in FIG. 6 is coated with cement during implantation in the lower, massive section of the anchoring shaft 22, in the upper cage Structure 46 of the anchor shaft 22 filled with ground cancellous material.
  • the latter grows in the healing process both against the cage structure 46 and against the recess 14, so that the prosthesis then both over an adhesive layer and over regrown
  • Cancellous material is securely attached to the bone end.
  • the lower section of the anchoring shaft 22, which is still massive in FIG. 6, can simply be designed as a continuation of the cage structure 46.
  • FIGS. 1 and 5 or FIG. 6 have the same outer contour, the surgeon can still decide after preparation of the end of the femur whether he wants a prosthesis that is to be implanted completely without cement, a partly cemented, partly waxing-in prosthesis 6 or a fully cemented prosthesis according to FIGS. 1-5.

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

Un élément prothétique (10) destiné à être implanté dans l'extrémité supérieure d'un fémur (12) comporte une section d'ancrage dont la géométrie correspond à celle d'une pyramide curviligne de section carrée.
PCT/EP1997/004825 1996-03-19 1997-09-05 Element prothetique WO1999012499A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19610729A DE19610729A1 (de) 1996-03-19 1996-03-19 Prothesenteil
EP97919038A EP1028674A1 (fr) 1997-09-05 1997-09-05 Element prothetique
PCT/EP1997/004825 WO1999012499A1 (fr) 1996-03-19 1997-09-05 Element prothetique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19610729A DE19610729A1 (de) 1996-03-19 1996-03-19 Prothesenteil
PCT/EP1997/004825 WO1999012499A1 (fr) 1996-03-19 1997-09-05 Element prothetique

Publications (1)

Publication Number Publication Date
WO1999012499A1 true WO1999012499A1 (fr) 1999-03-18

Family

ID=26023934

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/004825 WO1999012499A1 (fr) 1996-03-19 1997-09-05 Element prothetique

Country Status (2)

Country Link
DE (1) DE19610729A1 (fr)
WO (1) WO1999012499A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19740689A1 (de) * 1997-09-16 1999-03-18 Franz Prof Dr Med Copf Oberschenkelprothese
DE10037345A1 (de) * 2000-07-29 2002-02-07 Juergen Buchholz Chirurgisches Element
EP3954333B1 (fr) * 2020-08-13 2023-05-03 Alessandro Melozzi Prothèse de hanche présentant une meilleure tige

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8213101U1 (de) * 1982-08-26 Howmedica International, Inc. Zweigniederlassung Kiel, 2300 Kiel Femorale Komponente einer Hüftgelenkendoprothese
FR2528307A1 (fr) * 1982-06-14 1983-12-16 Tornier Sa Prothese de hanche perfectionnee
DE3707518A1 (de) * 1986-05-16 1987-11-26 Copf Franz Prothesenteil sowie verfahren zu seiner herstellung
EP0289922A1 (fr) * 1987-05-06 1988-11-09 Fried. Krupp Gesellschaft mit beschränkter Haftung Prothèse d'articulation et procédé pour sa fabrication
US5152799A (en) * 1991-10-04 1992-10-06 Exactech, Inc. Prosthetic femoral stem
EP0790045A1 (fr) * 1996-02-08 1997-08-20 André Georges Deckner Tige d'ancrage utilisée notamment dans les prothèses

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8213101U1 (de) * 1982-08-26 Howmedica International, Inc. Zweigniederlassung Kiel, 2300 Kiel Femorale Komponente einer Hüftgelenkendoprothese
FR2528307A1 (fr) * 1982-06-14 1983-12-16 Tornier Sa Prothese de hanche perfectionnee
DE3707518A1 (de) * 1986-05-16 1987-11-26 Copf Franz Prothesenteil sowie verfahren zu seiner herstellung
EP0289922A1 (fr) * 1987-05-06 1988-11-09 Fried. Krupp Gesellschaft mit beschränkter Haftung Prothèse d'articulation et procédé pour sa fabrication
US5152799A (en) * 1991-10-04 1992-10-06 Exactech, Inc. Prosthetic femoral stem
EP0790045A1 (fr) * 1996-02-08 1997-08-20 André Georges Deckner Tige d'ancrage utilisée notamment dans les prothèses

Also Published As

Publication number Publication date
DE19610729A1 (de) 1997-09-25

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