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Silicate glass coatings on Ti-based implants

1998; Elsevier BV; Volume: 46; Issue: 7 Linguagem: Inglês

10.1016/s1359-6454(98)80039-6

1873-2453

Amparo Pazo, Eduardo Saiz, Antoni P. Tomsia,

Dental materials and restorations

Coating Ti-based implants with bioactive materials, able to form hydroxyapatite layers in vivo, facilitates joining between the prostheses and bone and increases the long-term stability of the implants. The present work describes a new route to coat Ti alloys with bioactive silica-based glasses. A new family of potentially bioactive glasses that display good physical compatibility with Ti has been developed. In order to fabricate dense coatings, glass powder has been painted over the metal substrates and the assemblies have been fired to make the glass flow and adhere to the metal. The reactions that occur between the glass and the metal during this process have been studied by thin film X-ray diffraction and electron microprobe. By tailoring the glass composition and controlling the firing conditions (atmosphere, temperature and time) homogeneous coatings with good adhesion to the metal have been prepared. The physical characteristics of the glasses and their behavior in simulated body fluid are also reported.