The possibility of obtaining a good bioactive coating on biomedical de
vices made with zirconia ceramic was considered. Yttria partially stab
ilized zirconia was used to produce suitable substrates. The obtained
adhesion was good (66 +/- 13 MPa) and encouraging for biomedical appli
cations. Small microcrystals formed inside and on the surface of the g
lass layer. These microcrystals transformed the glass into a glass-cer
amic. An accurate investigation of the nature of this microcrystal for
mation was carried out to verify its compatibility with the planned bi
omedical applications.