Biomedical Engineering Reference
In-Depth Information
13.11
Despite the excellent apposition and growth of trabecular
bone, the complete resorption of a highly crystalline hydroxyapatite
granule, experimentally used as bone filler in a cavity, has not been
obtained even after two years.
13.12
Deposition of a bioactive glass coating, in a similar fashion
to the hydroxyapatite coating, was applied in hip prostheses; in
this picture, a coated stem has been retrieved from a patient three
months after implantation; the process of resorption of the coating
had already started.
is to lead the bone to appose gradually to the metal (Fig. 13.12 and Fig.
13.13); this process should happen without the production, at its end, of
bulky non-degradable particles as those observed with the fragmentation of
the crystalline phase of hydroxyapatite coatings (Merolli
et al
., 2004).
