WO2012126449A1 - Insert céramique pour endoprothèses du genou - Google Patents

Insert céramique pour endoprothèses du genou Download PDF

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Publication number
WO2012126449A1
WO2012126449A1 PCT/DE2012/000109 DE2012000109W WO2012126449A1 WO 2012126449 A1 WO2012126449 A1 WO 2012126449A1 DE 2012000109 W DE2012000109 W DE 2012000109W WO 2012126449 A1 WO2012126449 A1 WO 2012126449A1
Authority
WO
WIPO (PCT)
Prior art keywords
ceramic
femoral component
implant according
base body
sliding surfaces
Prior art date
Application number
PCT/DE2012/000109
Other languages
German (de)
English (en)
Inventor
Milija MITROVIC
Original Assignee
Zm Präzisionsdentaltechnik 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 Zm Präzisionsdentaltechnik Gmbh filed Critical Zm Präzisionsdentaltechnik Gmbh
Publication of WO2012126449A1 publication Critical patent/WO2012126449A1/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
    • A61F2/38—Joints for elbows or knees
    • A61F2/3859—Femoral components
    • 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
    • A61F2002/30733—Inserts placed into an endoprosthetic cavity, e.g. for modifying a material property
    • 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
    • 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 orthopedic implant in the form of a femoral component of a knee endoprosthesis made of a metallic material.
  • the affected articular surfaces are removed and separated by two independent implants on the tibial and femoral side, i. at the upper end of the tibia (tibia) and at the lower end of the femur (femur), replaced.
  • Articular surface replacement on the femoral side serves as an implant, which in most known implants consists of a special high-strength titanium alloy or of a cobalt-chromium alloy, which is cast or forged and then polished.
  • the tibial joint side is replaced by an implant consisting of a titanium or cobalt chromium alloy, and a polyethylene insert is attached to it, which serves as a sliding partner for the femoral component.
  • Artificial knee replacement is now a reliable operation with implants that last up to 15 years. The most common cause of failure is aseptic implant loosening, which is caused by wear particles of the polyethylene component and can significantly shorten implant lifetimes.
  • the abrasion particles are caused by the wear of the polyethylene component caused by the friction with the femoral component. As the abrasive particles enter the bone-implant interface, biological processes are triggered at the cement-free anchor implant-bone or implant-bone cement-bone interface sites, which may result in progressive local bone destruction and eventually loosening of the implants.
  • a metallic zirconium-niobium alloy is used under the trade name Oxinium ®.
  • the femoral component is converted in a heat treatment process at about 500 ° C into a zirconia ceramic, which is a coating of zirconia, as it were.
  • implants have become known in which a femoral component made of mixed ceramics (BioloxDelta ® ) is used.
  • the wear of the polyethylene is reduced by the use of these femoral components available on the market compared to metal / polyethylene sliding pairings, thus prolonging the durability of the knee endoprosthesis.
  • disadvantages of these known Components are the high manufacturing costs of the oxinium components, the brittleness and the lack of adhesion of the ceramic component to the bone cement or bone.
  • the object of the invention is to form an implant of the type mentioned in such a way that the friction and thus the wear between the femoral component and the sliding partner polyethylene are as small as possible in comparison to metal / polyethylene sliding pairings.
  • the sliding surfaces of the femoral component consist of a ceramic material, wherein in the preferred embodiment, a ceramic based on zirconium dioxide is used.
  • the ceramic sliding surfaces are designed as infinite in the metallic body of the femoral component transitional inserts.
  • the main body of the femoral component is preferably made of a high-strength titanium alloy having a thermal expansion coefficient (CTE value) of about 10.5.
  • the connection between the ceramic sliding surfaces and the base body is preferably produced in the invention by a silicate ceramic solder solidified in a ceramic fire.
  • FIG. 1 is a perspective view of a femoral component of a knee endoprosthesis
  • FIG. 2 shows a schematic representation of a femoral knee joint implant fixed on a thighbone
  • Fig. 3 is a main body of a femoral
  • Fig. 4 inserts for the femoral component of a knee endoprosthesis according to. Fig. 1 and
  • FIG. 5 is a schematic representation of an assembly of base body and insert for the femoral component of a knee endoprosthesis according to FIG. 1.
  • FIG. 1 shows a perspective view of a femoral component of a knee endoprosthesis 1 which, in the case of the embodiment shown here, consists of a high-strength titanium alloy or cobalt-chromium alloy.
  • the implant consists of a basic body 2 which, in the case of the herein described embodiment of the high-strength titanium alloy "Grade 5" or cobalt-chromium alloy and having de 'sliding surfaces which are formed of inserts 3 made of a ceramic material.
  • inserts 3 can also consist of an alumina ceramic or of a mixture of these two ceramics.
  • the ceramic inserts 3 are integrated in the manner of intarsia into associated "wart-shaped" receptacles 4 in the metal base body 2 of the femoral component 1 so that they pass smoothly into the base body 2 and no shoulder edges are formed , which is solidified in a ceramic fire, firmly connected to the metal body 2.
  • the ceramic inserts 3 recreate the outer shape of conventional metallic femoral components in the sliding surface and significantly reduce the abrasion between the femoral component and the polyethylene insert.
  • the reduced abrasion of the sliding partners prevents the risk of particle-induced aseptic loosening and can thus contribute to longer lifetimes of the implants.

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Physical Education & Sports Medicine (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)
  • Materials For Medical Uses (AREA)
  • Prostheses (AREA)

Abstract

Implant orthopédique en forme d'élément fémoral pour une endoprothèse du genou, à surfaces de glissement en matériau céramique. Les surfaces de glissement se présentent sous forme d'inserts en céramique à base de dioxyde de zirconium ou d'oxyde d'aluminium qui se prolongent sans transition dans le corps de base métallique de l'élément fémoral. La liaison entre les inserts et le corps de base est réalisée au moyen d'une céramique de soudure silicatée fixée par céramisation.
PCT/DE2012/000109 2011-03-21 2012-02-02 Insert céramique pour endoprothèses du genou WO2012126449A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110015300 DE102011015300A1 (de) 2011-03-21 2011-03-21 Keramik-Einsatz für Knieendoprothesen
DE102011015300.4 2011-03-21

Publications (1)

Publication Number Publication Date
WO2012126449A1 true WO2012126449A1 (fr) 2012-09-27

Family

ID=45893958

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2012/000109 WO2012126449A1 (fr) 2011-03-21 2012-02-02 Insert céramique pour endoprothèses du genou

Country Status (2)

Country Link
DE (1) DE102011015300A1 (fr)
WO (1) WO2012126449A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017114519A1 (fr) * 2015-12-29 2017-07-06 Zm Präzisionsdentaltechnik Gmbh Implant orthopédique
US10543095B2 (en) 2015-12-29 2020-01-28 Milija Mitrovic Orthopedic implant and method of producing the implant

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015016894B3 (de) * 2015-12-29 2017-07-13 Zm Präzisionsdentaltechnik Gmbh Implantat

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995023567A1 (fr) * 1994-03-03 1995-09-08 Ben Nissan Besim Prothese modulaire du genou en ceramique
DE19711628A1 (de) * 1997-01-17 1998-07-23 Ceramtec Ag Fixation eines keramischen Bauteils als Gleitkomponente in einem Femurteil
EP1992309A1 (fr) * 2007-05-16 2008-11-19 Zimmer, Inc. Système de réduction d'usure d'une surface articulaire à implant
US20090125115A1 (en) * 2007-05-16 2009-05-14 Zimmer, Inc. Knee system and method of making same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995023567A1 (fr) * 1994-03-03 1995-09-08 Ben Nissan Besim Prothese modulaire du genou en ceramique
DE19711628A1 (de) * 1997-01-17 1998-07-23 Ceramtec Ag Fixation eines keramischen Bauteils als Gleitkomponente in einem Femurteil
EP1992309A1 (fr) * 2007-05-16 2008-11-19 Zimmer, Inc. Système de réduction d'usure d'une surface articulaire à implant
US20090125115A1 (en) * 2007-05-16 2009-05-14 Zimmer, Inc. Knee system and method of making same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017114519A1 (fr) * 2015-12-29 2017-07-06 Zm Präzisionsdentaltechnik Gmbh Implant orthopédique
US10543095B2 (en) 2015-12-29 2020-01-28 Milija Mitrovic Orthopedic implant and method of producing the implant
US10646348B2 (en) 2015-12-29 2020-05-12 ZM Praezisiondentaltechnik GmbH Orthopedic implant

Also Published As

Publication number Publication date
DE102011015300A1 (de) 2012-09-27

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