Abrégé

Metal objects are treated by anodising the metal object in contact with an aqueous electrolyte, and then subjecting the anodised metal object to a reversed voltage. The anodising is performed in two stages, firstly to passivate with the formation of an oxide layer, and secondly to form regions in the oxide layer having a higher oxygen to metal atom ratio, for example pits or caps, in this oxide layer. The second stage of anodising is performed by applying a multiplicity of voltage cycles, each voltage cycle involving ramping the voltage between a lower threshold voltage and an upper threshold voltage, and then returning to the lower threshold voltage. The reversed voltage step forms a hydrous metal oxide in the regions of higher oxygen to metal atom ratio, and the oxide layer and hydrous metal oxide together constitute a surface layer which is integral with the metal object, and has ion exchange capacity. After the reversed voltage step the metal object is then contacted with a bio-effective material such as a biocidal metal, which is absorbed into the surface of the metal object. The processing time may be reduced by applying the multiple voltage cycles. The invention also provides a treated metal object which can be prepared by treating a metal object having a micro-rough surface according to the method described above.

Classes IPC  ?

• A61L 27/54 - Matériaux biologiquement actifs, p.ex. substances thérapeutiques
• A61L 27/06 - Titane ou alliages de titane
• A61L 27/50 - Matériaux caractérisés par leur fonction ou leurs propriétés physiques
• A61L 27/04 - Métaux ou alliages
• C25D 11/02 - Anodisation
• C25D 11/34 - Anodisation de métaux ou d'alliages non prévus dans les groupes

Abrégé

Metal objects are treated by anodising the metal object in contact with an aqueous electrolyte, and then subjecting the anodised metal object to a reversed voltage. The anodising is performed in two stages, firstly to passivate with the formation of an oxide layer, and secondly to form regions in the oxide layer having a higher oxygen to metal atom ratio, for example pits or caps, in this oxide layer. The second stage of anodising is performed by applying a multiplicity of voltage cycles, each voltage cycle involving ramping the voltage between a lower threshold voltage and an upper threshold voltage, and then returning to the lower threshold voltage. The reversed voltage step forms a hydrous metal oxide in the regions of higher oxygen to metal atom ratio, and the oxide layer and hydrous metal oxide together constitute a surface layer which is integral with the metal object, and has ion exchange capacity. After the reversed voltage step the metal object is then contacted with a bio-effective material such as a biocidal metal, which is absorbed into the surface of the metal object. The processing time may be reduced by applying the multiple voltage cycles. The invention also provides a treated metal object which can be prepared by treating a metal object having a micro-rough surface according to the method described above.

Classes IPC  ?

• A61L 27/04 - Métaux ou alliages
• A61L 27/06 - Titane ou alliages de titane
• A61L 27/50 - Matériaux caractérisés par leur fonction ou leurs propriétés physiques
• A61L 27/54 - Matériaux biologiquement actifs, p.ex. substances thérapeutiques

Abrégé

Metal objects are treated by anodizing (P, SE) the metal object in contact with an acidic solution, and then subjecting the anodized metal object to a reversed voltage (VR). The anodizing is performed in two stages, firstly to passivate (P) with the formation of a surface layer, and secondly to form pits in this surface layer (SE). The second stage (SE) of anodizing is performed at a lower voltage than the first stage (P). After the reversed voltage step (VR) the metal object is then contacted with a biocidal metal-containing solution. Biocidal metal is absorbed into the surface of the metal object, resulting in improved biocidal properties. The lower voltage of the second stage anodizing (SE) results in reduced processing time.

Classes IPC  ?

• C25D 11/26 - Anodisation de métaux réfractaires ou de leurs alliages
• C25D 11/24 - Post-traitement chimique
• C23C 28/00 - Revêtement pour obtenir au moins deux couches superposées, soit par des procédés non prévus dans un seul des groupes principaux , soit par des combinaisons de procédés prévus dans les sous-classes et
• A61L 31/02 - Matériaux inorganiques
• A61L 31/08 - Matériaux de revêtement
• A61L 31/16 - Matériaux biologiquement actifs, p.ex. substances thérapeutiques

Produits et services

Orthopaedic implants, prosthetic implants, and surgical implants, all provided with coatings of ceramic or metal; orthopaedic implants, prosthetic implants, and surgical implants with anti-microbial coatings. Surface treatment of orthopaedic implants, prosthetic implants, and surgical implants by depositing coatings of ceramic or of metal; surface treatment of orthopaedic implants, prosthetic implants, and surgical implants by depositing coatings with anti-microbial properties.

Produits et services

[ Implants consisting of artificial materials, namely, orthopaedic implants, prosthetic implants, and surgical implants, all provided with coatings of ceramic or metal containing silver; implants consisting of artificial materials, namely, orthopaedic implants, prosthetic implants, and surgical implants with anti-microbial coatings containing silver ] Surface treatment of orthopaedic implants, prosthetic implants, and surgical implants by depositing coatings of ceramic or of metal containing silver; surface treatment of orthopaedic implants, prosthetic implants, and surgical implants by depositing coatings with anti-microbial properties containing silver

Abrégé

In a process for anodizing a metal object (12), the metal object (12) is contacted with an anodizing electrolyte (32), and is first pre-anodized so as to grow a thin oxide film on the surface. The microscopic surface area is then deduced from electrical measurements either during pre-anodizing or on the pre-anodized surface. The metal object (12) can then be anodized. This is applicable when treating an implant to provide a surface that has the ability to incorporate biocidal material such as silver ions. The pre-anodizing uses a low voltage, for example no more than 2. V, and may take less than 120 seconds.

Classes IPC  ?

• C25D 11/16 - Prétraitement
• C25D 21/12 - Commande ou régulation
• C25D 11/02 - Anodisation

Abrégé

Metal implants (10) are treated by anodising the surface (11, 12) in contact with an electrolyte, and then briefly subjecting the anodised surface to a reversed voltage. During a first anodising stage the surfaces are passivated, while during a subsequent anodising stage pits are formed in the passivating surface layer. Rough portions (15) of the surface, in particular portions produced by plasma spraying of metal powder, are sealed with a watertight cover (20) during at least part of the anodising process. After rinsing, biocidal metal ions are subsequently absorbed into the surface of the implant. This provides the implant with biocidal properties. The use of the cover (20) enables a more uniform geometric distribution of biocidal metal ions to be achieved.

Classes IPC  ?

• C25D 5/02 - Dépôt sur des surfaces déterminées
• A61L 27/04 - Métaux ou alliages
• C25D 11/02 - Anodisation
• A61L 27/54 - Matériaux biologiquement actifs, p.ex. substances thérapeutiques
• C25D 11/26 - Anodisation de métaux réfractaires ou de leurs alliages
• A61F 2/30 - Articulations

Abrégé

A method of applying a coating to a substrate material (30) for use as a composite body wherein the material is a polymer or a ceramic, which method comprises plasma spraying a powder such as zirconia or titania onto the substrate material to form an initial layer (32). Coatings of other materials such as titanium metal (34) or hydroxyapatite (36) can subsequently be deposited directly or indirectly onto the initial layer (32). The initial layer (32) avoids problems of poor adhesion.

Classes IPC  ?

• C04B 41/89 - Revêtement ou imprégnation pour obtenir au moins deux revêtements superposés de compositions différentes
• A61L 27/30 - Matériaux inorganiques

Abrégé

In a process for anodising a metal object (12), the metal object (12) is contacted with an anodising electrolyte (32), and is first pre-anodised so as to grow a thin oxide film on the surface. The microscopic surface area is then deduced from electrical measurements either during pre-anodising or on the pre-anodised surface. The metal object (12) can then be anodised. This is applicable when treating an implant to provide a surface that has the ability to incorporate biocidal material such as silver ions. The pre-anodising uses a low voltage, for example no more than 2. V, and may take less than 120 seconds.

Classes IPC  ?

• C25D 11/16 - Prétraitement
• C25D 21/12 - Commande ou régulation
• C25D 11/02 - Anodisation

Abrégé

Metal objects are treated by anodising (P, SE) the metal object in contact with an acidic solution, and then subjecting the anodised metal object to a reversed voltage (VR). The anodising is performed in two stages, firstly to passivate (P) with the formation of a surface layer, and secondly to form pits in this surface layer (SE). The second stage (SE) of anodising is performed at a lower voltage than the first stage (P). After the reversed voltage step (VR) the metal object is then contacted with a biocidal metal-containing solution. Biocidal metal is absorbed into the surface of the metal object, resulting in improved biocidal properties. The lower voltage of the second stage anodising (SE) results in reduced processing time.

Classes IPC  ?

• C25D 11/26 - Anodisation de métaux réfractaires ou de leurs alliages
• A61L 31/02 - Matériaux inorganiques
• A61L 31/08 - Matériaux de revêtement
• A61L 31/16 - Matériaux biologiquement actifs, p.ex. substances thérapeutiques

Abrégé

Metal implants (10) are treated by anodising the surface (11, 12) in contact with an electrolyte, and then briefly subjecting the anodised surface to a reversed voltage. During a first anodising stage the surfaces are passivated, while during a subsequent anodising stage pits are formed in the passivating surface layer. Rough portions (15) of the surface, in particular portions produced by plasma spraying of metal powder, are sealed with a watertight cover (20) during at least part of the anodising process. After rinsing, biocidal metal ions are subsequently absorbed into the surface of the implant. This provides the implant with biocidal properties. The use of the cover (20) enables a more uniform geometric distribution of biocidal metal ions to be achieved.

Classes IPC  ?

• C25D 5/02 - Dépôt sur des surfaces déterminées
• C25D 11/02 - Anodisation
• C25D 11/26 - Anodisation de métaux réfractaires ou de leurs alliages
• A61L 27/00 - Matériaux pour prothèses ou pour revêtement de prothèses

Produits et services

Orthopaedic implants, prosthetic implants, and surgical implants, all provided with coatings of ceramic or metal. Surface treatment of orthopaedic implants, prosthetic implants, and surgical implants by depositing coatings of ceramic or of metal.

Produits et services

Surface treatment of orthopaedic implants, prosthetic implants, and surgical implants by depositing, by plasma spraying or electrodeposition, coatings of ceramic or of metal

Abrégé

Metal objects are treated by anodising (P, SE) the metal object in contact with an acidic solution, and then subjecting the anodised metal object to a reversed voltage (VR). The anodising is performed in two stages, firstly to passivate (P) with the formation of a surface layer, and secondly to form pits in this surface layer (SE). The second stage (SE) of anodising is performed at a lower voltage than the first stage (P). After the reversed voltage step (VR) the metal object is then contacted with a biocidal metal-containing solution. Biocidal metal is absorbed into the surface of the metal object, resulting in improved biocidal properties. The lower voltage of the second stage anodising (SE) results in reduced processing time.

Classes IPC  ?

• C25D 11/26 - Anodisation de métaux réfractaires ou de leurs alliages
• A61L 27/04 - Métaux ou alliages

Abrégé

Metal objects are treated by anodising the metal object in contact with an acidic solution, and then subjecting the anodised metal object to a reversed voltage (compared to the anodising voltage). The thus-treated metal object is then contacted with a biocidal metal-containing solution. Biocidal metal is deposited on the surface of the metal object, resulting in improved biocidal properties.

Classes IPC  ?

• C25D 11/26 - Anodisation de métaux réfractaires ou de leurs alliages
• A61L 27/02 - Matériaux inorganiques
• A61L 27/54 - Matériaux biologiquement actifs, p.ex. substances thérapeutiques
• A61L 27/50 - Matériaux caractérisés par leur fonction ou leurs propriétés physiques
• A61F 2/30 - Articulations
• A61B 17/064 - Agrafes chirurgicales
• A61F 2/32 - Articulations pour la hanche
• A61F 2/28 - Os
• A61B 17/68 - Dispositifs de fixation interne

Abrégé

Metal objects are treated by anodising the metal object in contact with an acidic solution, and then subjecting the anodised metal object to a reversed voltage (compared to the anodising voltage). The thus- treated metal object is then contacted with a biocidal metal-containing solution. Biocidal metal is deposited on the surface of the metal object, resulting in improved biocidal properties.

Classes IPC  ?

• C25D 11/26 - Anodisation de métaux réfractaires ou de leurs alliages
• A61L 27/16 - Matériaux macromoléculaires obtenus par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carbone

Produits et services

Orthopaedic implants; prosthetic implants. A service of treating the surface of orthopaedic implants and of prosthetic implants.

Produits et services

Orthopedic joint implants; orthopedic bone implants composed of artificial materials; prosthetic and filling materials, namely, artificial materials for use in the replacement of bones; parts and fittings of the aforesaid goods Custom manufacturing of orthopaedic bone implants or orthopaedic joint implants and prosthetics for bones and/or joints, namely, treating the surface of orthopaedic and prosthetic implants by deposition, anodizing, electrostatic spray coating, dip coating or plasma spraying; consultancy, information and advisory services relating to the aforesaid services

Abrégé

A metal implant for use in a surgical procedure is provided with a surface layer that is integral with the metal substrate, and which incorporates a biocidal material. The surface layer is grown by anodizing at a voltage between 50 and 150 V, and the biocidal material incorporated in it by ion exchange. This produces a significantly harder surface than anodizing at low voltage, and generates pits containing ion-absorbing material.

Classes IPC  ?

• A61L 27/06 - Titane ou alliages de titane
• A61L 27/30 - Matériaux inorganiques
• A61L 27/32 - Matériaux contenant du phosphore, p.ex. apatite
• A61L 27/54 - Matériaux biologiquement actifs, p.ex. substances thérapeutiques
• C23C 28/04 - Revêtements uniquement de matériaux inorganiques non métalliques
• C25D 11/26 - Anodisation de métaux réfractaires ou de leurs alliages
• A61L 27/04 - Métaux ou alliages
• A61L 27/56 - Matériaux poreux ou cellulaires