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Poster Presentation

Microstructure and Properties of Plasma Sprayed Bioactive Glass Ceramics Coatings

Sunday (01.01.2040)
00:00 - 08:04
Part of:
Line-Up:
- Poster Presentation The European user access program nanoscience foundries and fine analysis (NFFA) 0 Dr.-Ing. Thomas F. Keller
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- Poster Presentation Nir Laser-responsive Folate-targeted Gold Nanorods As Efficient theranostic tool for Osteosarcoma Treatment 1 Ph.D. Nicol? Mauro
- Poster Presentation Mechanical properties of recent CAD/CAM polymer materials 1 Sebastian Spintzyk
- Poster Presentation Multilayers of Nanoparticles with Alginate, Chondroitin sulfate and Hyaluronic acid for graded implants 1 Steffen Sydow
- Poster Presentation Design of drug eluting ophthalmic lenses through a multi-layer approach 1 Dr. Ana Topete
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- Poster Presentation Investigating the compressibility of spray dried alumina-zirconia granules for use in orthopaedics - an easy to use and fast method 1 Dr. Ranko Adjiski
- Poster Presentation Biochemical modification of extruded protein nanofibers 1 Karsten Stapelfeldt
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- Poster Presentation Modeling the Viscosity of Silicone Rubber During High-Speed Infrared Curing 1 Jan Stieghorst
- Poster Presentation Effect of the pH of bleaching H2O2 solutions in the enamel morphology, hardness and color 1 Dr. Ana Topete
- Poster Presentation New crosslinking diluents for dental materials 1 Prof. Dr. Norbert Moszner
- Poster Presentation Microstructure and Properties of Plasma Sprayed Bioactive Glass Ceramics Coatings 1 Annamária Dobrádi
- Poster Presentation Impact of chloride ions on apatite mineralisation on Bioglass® 45S5 0 Juliane Brandt-Slowik
- Poster Presentation In vivo performance of polymeric photodynamic active biomaterials for periodontal regeneration 1 Dr. Stefan Kranz
- Poster Presentation Adjusted material-cell interaction using engineered spider silk proteins 1 Vanessa Trossmann
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Session P.2: Poster Session 2
Belongs to:
Topic P: Postersession


Natural bone derived glass-ceramics are promising biomaterials for implants. Due to their price and mechanical properties however they are preferably applied as coatings on load bearing implants. The presentation will describe result obtained by plasma spraying of bioactive glass ceramics containing natural bone onto selected implant materials such as stainless steel, alumina, and titanium alloy.

The coating thickness measured by computed X-ray tomography is about 0.2 to 0.3 mm. The microstructure of coatings as well as the interface between the substrates and coatings were tested by SEM of cross sections. The results show a defect free interface between the support and the coating. No cracks or gaps are observed in the substrate to coating interface. SBF treatment of plasma sprayed coating is not influencing the boundary between the support and the coating.

As a result of the above described plasma spraying of the protein free and the sintered protein free bovine bone containing glass-ceramics a crack free, nearly dense, low porosity coatings was obtained. The plasma spraying modifies the phase composition, and new calcium phosphate phases e.g. α-whitlockite, tetracalcium phosphate, etc. are formed at the high temperature of the plasma. Adherence of the coating is excellent, and the process itself is beneficial to the dissolution properties, because the dissolution rate is slower as compared to the bulk material.

The surface of all substrates is fully covered by these plasma sprayed coatings. Although the coatings do not show a fully dense, pore free microstructure, they perfectly cover the substrates and have low porosity. Pre-treated protein free bovine bone containing coatings have smaller porosity, higher Vickers microhardness in bulk, and higher compressive strength. Such microstructure will easily dissipate mechanical stresses and will not deteriorate even after the subsequent SBF-treatment (during the formation of a new Ca-phosphate layer), they will neither crack nor scale.

This way the specific surface is higher and therefore it will provide a better contact with the body fluid which in turn promotes the formation of a new layer and enhances the binding of implants.




 

Speaker:
Annamária Dobrádi
University of Pannonia
Additional Authors:
  • Dr. Kristóf Kovács
    University of Pannonia
  • Dr. Margit Enisz-Bódogh
    University of Pannonia