Bioactive glass coatings for orthopedic metallic implants

The objective of this work is to develop bioactive glass coatings for metallic orthopedic implants. A new family of glasses in the SiO2–Na2O–K2O–CaO–MgO–P2O5 system has been synthesized and characterized. The glass properties (thermal expansion, softening and transformation temperatures, density and hardness) are in line with the predictions of established empirical models. The optimized firing conditions to fabricate coatings on Ti-based and Co–Cr alloys have been determined and related to the glass properties and the interfacial reactions. Excellent adhesion to alloys has been achieved through the formation of 100–200 nm thick interfacial layers (Ti5Si3 on Ti-based alloys and CrOx on Co–Cr). Finally, glass coatings, approximately 100 mm thick, have been fabricated onto commercial Ti alloy-based dental implants. # 2003 Elsevier Ltd. All rights reserved.

[1]  E. Saiz,et al.  Glass-based coatings for titanium implant alloys. , 1999, Journal of biomedical materials research.

[2]  M. Jackson,et al.  Thermal expansion of alumino-alkalisilicate and alumino- borosilicate glasses -- comparison of empirical models , 1997 .

[3]  E. Lora-Tamayo,et al.  Bioceramics—simulated body fluid interfaces: pH and its influence of hydroxyapatite formation , 1996 .

[4]  D. Holland,et al.  NMR investigation of the structure of some bioactive and related glasses , 1995 .

[5]  L. Hench,et al.  BIOACTIVE GLASS COATINGS , 1993 .

[6]  I. W. Donald.  Preparation, properties and chemistry of glass- and glass-ceramic-to-metal seals and coatings , 1993, Journal of Materials Science.

[7]  Ian A. Ashcroft,et al.  Adhesion testing of glass-ceramic thick films on metal substrates , 1993, Journal of Materials Science.

[8]  Larry L. Hench,et al.  Bioceramics: From Concept to Clinic , 1991 .

[9]  M. Stowell,et al.  Dual phase vitreous enamels Part 2 Adhesion of vitreous enamels on steel , 1989 .

[10]  J. A. Pask,et al.  Fundamentals of Glass‐to‐Metal Bonding: VIII, Nature of Wetting and Adherence , 1962 .

[11]  W. H. Duckworth,et al.  Nature of Adherence of Porcelain Enamels to Metals , 1959 .

[12]  J. Richmond,et al.  Relation between roughness of interface and adherence of porcelain enamel to steel , 1953 .

[13]  J. Healy,et al.  The Cobalt‐Reduction Theory for the Adherence of Sheet‐Iron Ground Coats , 1951 .

[14]  F. P. Hall.  THE INFLUENCE OF CHEMICAL COMPOSITION ON THE PHYSICAL PROPERTIES OF GLAZES , 1930 .

[15]  W. Turner,et al.  RELATIONSHIP BETWEEN CHEMICAL COMPOSITION AND THE THERMAL EXPANSION OF GLASSES1 , 1927 .

[16]  A. Severin.  Brazing of carbon steel , 1997 .