  We study transfers of ions and debris from bioceramics implanted in bone
sites. A contamination of surrounding tissues may play a major role in aseptic
loosening of the implant. For these reasons, bioceramics require studies of
biocompatibility and biofunctionality . So, in addition to in vitro studies of
bioceramics, it is essential to implant them in vivo to know body reactions. We
measured the concentration of mineral elements at different time intervals
after implantation over a whole cross-section. We found a discontinuity of the
mineral elements (Ca, P, Sr, Zn, Fe) at the interface between the implant and
the receiver. The osseous attack is not global but, on the contrary,
centripetal. Moreover, the fit of the concentration time course indicates that
the kinetics of ossification is different for each atomic element and
characterizes a distinct biological phenomenon
