EP1301220A1 - Couches composites de phosphate de calcium bioactives deposees electrochimiquement sur des implants - Google Patents

Couches composites de phosphate de calcium bioactives deposees electrochimiquement sur des implants

Info

Publication number
EP1301220A1
EP1301220A1 EP00945927A EP00945927A EP1301220A1 EP 1301220 A1 EP1301220 A1 EP 1301220A1 EP 00945927 A EP00945927 A EP 00945927A EP 00945927 A EP00945927 A EP 00945927A EP 1301220 A1 EP1301220 A1 EP 1301220A1
Authority
EP
European Patent Office
Prior art keywords
calcium phosphate
implants
composite
composite layers
electrochemically deposited
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
EP00945927A
Other languages
German (de)
English (en)
Inventor
Hans-Georg Neumann
Peter Zeggel
Petra Becker
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.)
DOT GmbH
Original Assignee
DOT 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 DOT GmbH filed Critical DOT GmbH
Publication of EP1301220A1 publication Critical patent/EP1301220A1/fr
Ceased legal-status Critical Current

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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/28—Materials for coating prostheses
    • A61L27/30—Inorganic materials
    • A61L27/32—Phosphorus-containing materials, e.g. apatite
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
    • A61L27/56—Porous materials, e.g. foams or sponges
    • 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
    • A61F2002/3092—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth having an open-celled or open-pored structure
    • 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
    • A61F2310/00592—Coating or prosthesis-covering structure made of ceramics or of ceramic-like compounds
    • A61F2310/00796—Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2430/00—Materials or treatment for tissue regeneration
    • A61L2430/02—Materials or treatment for tissue regeneration for reconstruction of bones; weight-bearing implants

Definitions

  • Calcium phosphate layers deposited on implants from electrolytic baths are genetically very similar to the processes involved in bone growth. Their microporous structure favors the immobilization of cells from which new bone tissue forms and, like normal wound healing, can grow together with the bone tissue surrounding the implant.
  • Another method for producing adherent hydroxylapatite / cobalt composites is based on electrochemically deposited porhite layers which are chemically converted into hydroxylapatite and subsequently coated with cobalt in another bath (Zhang, JM et al .: J. Mat. Sei. Lett. 17 (1998) 1077-9).
  • the aim is to achieve the greatest possible similarity to the structural structure of the natural mature bone and thus to promote the healing of the implant in the bone.
  • the invention is therefore based on the object of depositing a layer on the bone implant which optimally supports the healing of the implant in the bone, is thereby completely absorbed and thus enables the direct and complete non-positive contact of the bone with the implant.
  • the composite layer according to the invention contains above all the more easily soluble phases of the young bone tissue.
  • the easily soluble phases can actively support the body's own osteogenesis through locally increased calcium and phosphate concentrations, since under these conditions the increase and maturation of the osteoblasts necessary for osteogenesis is accelerated.
  • the more difficultly soluble phases ensure a slightly increased calcium and phosphate ion concentration in the implant's healing zone and thus promote the expansion and stabilization of the new bone tissue.
  • the composite layer cannot and should not serve as a barrier between the implant and the bone, but should serve as a harmonizing factor or host in the body's own structuring of the interface between the implant and the bone.
  • the high bioactivity of this sponge-like composite manifests itself in the excellent wetting by the im Wound bed of the body fluid and the associated adhesion of the factors contained in this fluid that stimulate osteogenesis.
  • the structure, composition and thickness of the composite layers can be adapted to the respective implant and the bone surrounding the implant.
  • this composite can proceed in such a way that the individual phases are deposited simultaneously or also one after the other or portions of one, for example the more soluble, calcium phosphate phase are converted into a less soluble phase by a chemical reaction. It is not primarily intended to create a vertical solubility gradient in the composite. Rather, the different phases should develop laterally next to each other and dissolve after implantation. The porosity of the composite will initially increase due to the decrease in the more soluble phases and space will be created for new bone tissue until the entire composite is converted into bone tissue even after the less soluble calcium phosphate phases have dissolved.
  • the progressive dissolution of the individual phases should develop a positive connection between the bone and the implant from the beginning.
  • the time course of the dissolution of the composite layer can be characterized in a simplified manner by three sections.
  • section I the greatest local increase in the calcium and phosphate ion concentration present in the interface between the implant and bone is essentially determined by the more easily soluble phases. In this section it must be ensured that no fibrous encapsulation of the implant occurs and that its immediate osteointegration is made possible.
  • the less soluble composite component will determine the local ion balance and in particular support the mineralization of the new bone tissue.
  • the entire composite is dissolved and replaced with new bone. The implant is non-positively healed in the bone.
  • osteoinductive additives and / or antimicrobial agents are also released from the composite.

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Public Health (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Epidemiology (AREA)
  • Dermatology (AREA)
  • Medicinal Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Inorganic Chemistry (AREA)
  • Materials For Medical Uses (AREA)
  • Prostheses (AREA)

Abstract

L'invention concerne des couches composites de phosphate de calcium bioactives déposées électrochimiquement sur des implants osseux. De tels implants sont implantés sans ciment et se caractérisent par un pouvoir d'ostéointégration amélioré. Lesdites couches composites ultra-poreuses destinées à des implants sont composées d'au moins deux phases de phosphate de calcium de solubilités différentes. La structure ultra-poreuse de ces couches permet de simplifier l'immobilisation de cellules à partir desquelles le tissu osseux peut se régénérer. Les solubilités différentes des composantes de couches individuelles permettent d'obtenir la concentration locale d'ions calcium et d'ions phosphate accélérant le processus de guérison et s'adaptant au processus dans le temps.
EP00945927A 2000-07-17 2000-07-17 Couches composites de phosphate de calcium bioactives deposees electrochimiquement sur des implants Ceased EP1301220A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2000/006838 WO2002005862A1 (fr) 2000-07-17 2000-07-17 Couches composites de phosphate de calcium bioactives deposees electrochimiquement sur des implants

Publications (1)

Publication Number Publication Date
EP1301220A1 true EP1301220A1 (fr) 2003-04-16

Family

ID=8164028

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00945927A Ceased EP1301220A1 (fr) 2000-07-17 2000-07-17 Couches composites de phosphate de calcium bioactives deposees electrochimiquement sur des implants

Country Status (6)

Country Link
EP (1) EP1301220A1 (fr)
JP (1) JP2004503333A (fr)
AU (2) AU2000259855B2 (fr)
CA (1) CA2416201C (fr)
HK (1) HK1060070A1 (fr)
WO (1) WO2002005862A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012001260A1 (de) 2012-01-23 2013-07-25 Dot Gmbh Antibakterielle und osteoinduktive Implantatbeschichtung

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006007730A1 (fr) * 2004-07-21 2006-01-26 The University Of British Columbia Implants osseux et procedes d'enrobage de ces implants
US10610614B2 (en) 2006-09-08 2020-04-07 Kyocera Corporation Bioimplant with evanescent coating film
US10004604B2 (en) 2006-09-08 2018-06-26 Kyocera Corporation Bioimplant for artifical joint with evanescent coating film
US11278642B2 (en) 2006-09-08 2022-03-22 Takao Hotokebuchi Bioimplant with evanescent coating film

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5205921A (en) * 1991-02-04 1993-04-27 Queen's University At Kingston Method for depositing bioactive coatings on conductive substrates
DE19504386C2 (de) * 1995-02-10 1997-08-28 Univ Dresden Tech Verfahren zur Herstellung einer gradierten Beschichtung aus Calciumphosphatphasen und Metalloxidphasen auf metallischen Implantaten
EP0806212B1 (fr) * 1996-05-10 2003-04-02 IsoTis N.V. Dispositif pour l'incorporation et la délivrance d'agents bioactifs
US6045683A (en) * 1997-12-01 2000-04-04 University Of Alabama In Huntsville Modified brushite surface coating, process therefor, and low temperature conversion to hydroxyapatite
AU766735B2 (en) * 1998-09-15 2003-10-23 Isotis N.V. Osteoinduction

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0205862A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012001260A1 (de) 2012-01-23 2013-07-25 Dot Gmbh Antibakterielle und osteoinduktive Implantatbeschichtung

Also Published As

Publication number Publication date
WO2002005862A1 (fr) 2002-01-24
WO2002005862A8 (fr) 2002-05-30
AU5985500A (en) 2002-01-30
HK1060070A1 (en) 2004-07-30
AU2000259855A1 (en) 2002-05-02
JP2004503333A (ja) 2004-02-05
CA2416201C (fr) 2008-11-18
CA2416201A1 (fr) 2003-01-15
AU2000259855B2 (en) 2006-02-02

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