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DEVELOPPEMENT DE MATERIAUX BIOCOMPATIBLES PAR TRAITEMENT DE SURFACE - UTILISATION DE L'IMPLANTATION IONIQUE

Objective

To improve biocompatibility and increase the durability of materials used in the biomedical field.
The objectives of this project are to improve biocompatibility and increase the durability of materials used in the biomedical field.

The first aspect to be explored is the resistance of stainless steel and copper chromium molybdenum orthopaedic implants in biological environments involving improvement of the superficial properties relative to fretting and to corrosion. Ion implantation will be performed with species acting on the tribological behaviour (titanium, carbon, nitrogen, silicon) and on the surface electrochemical properties (titanium, molybdenum, silicon, palladium).

Examination is also taking place of the tolerance of the tissues to the materials, using implantation of elements which make up the tissues and are suspected of inhibiting the biological reactions. 2 types of ions will be implanted: calcium, phosphorus and silicon to link ions enhancing the calcification in the case of orthopaedic implants, ions modifying hydrophilic characteristics and hydrophobic characteristics of the polymers surfaces: carbon, nitrogen, oxygen, silicon. These implantations will be followed by coatings of constituents such as bioglasses for the bone implants and proteins grafting for flexible materials.

Achievements to date involve the improvement of materials resistant to degradation bymetal metal interaction. Improvement in the tribological properties of metallic materials by nitrogen implantation is one of the first applications of this technique; it has been applied to titanium alloys and stainless steel in the biomedical field as well as in other fields. Moreover, significant improvements in corrosion resistance can be achieved by the implantation of other elements (chromium titanium molybdenum silicon palladium) used 1 by 1 or in combination, possibly including nitrogen.

Insertion of the materials in a biological medium metal bone interaction has occurred and a biodegradable osteoconductive bioglass has been developed and a feasibility study is under way , into polymer blood interaction.
These aspects will be explored:
1.The resistance of stainless steel and CoCrMo orthopaedic implants in biological environments with an improvement of the superficial properties relative to fretting and to corrosion. Ion implantation will be performed with species acting on the tribiological behaviour (Ti, C, N, Si) and on the surface electrochemical properties (Ti, Mo, Si, Pd).
2.The tolerance of the issues to the materials, using implantation of elements which make up the tissues and are suspected of inhibiting the biological reactions. Two types of ions will be implanted: Ca, P, Si to link ions enhancing the calcification in the case of orthopaedic implants, ions modifying hydrophillic/hydrophobic characteristics of the polymers surfaces: C, N, O, Si. These implantations will be followed by coatings of constituents such as bioglasses for the bone implants and proteins grafting for flexible materials.

Coordinator

Società Esportazione Importazione Prodotti Industriali SpA
Address
Via Quarenghi 27
20151 Milano
Italy

Participants (7)

BIOMATECH S.A.
France
Address
Rue Pasteur 115, Z.i. L'islon
38670 Chasse Sur Rhone
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS)
France
Address
3, Rue Michel Ange
Société Framatome
France
Address
Tour Fiat 1 Place De La Coupole
92084 Paris La Défense
Solvay et Cie SA
Belgium
Address
Rue De Ransbeek 310
1120 Brussels
University of Porto
Portugal
Address
Rua Dos Bragas
4099 Porto
Università degli Studi di Padova
Italy
Address
Via Marzolo 8
35131 Padova
Università degli Studi di Parma
Italy
Address
Via Del Taglio 8
43100 Parma