Mechanical Properties of Anti-Infectious, Bio-Active and Wear Resistant Ceramic Implant Surface Coatings
Implant failure due to aseptic loosening is a major complication in total hip arthroplasty. Different implant coatings aim to reduce the risk of implant loosening by anti-infectious, bio-active or wear resistant approaches. The mechanical properties, especially bonding strength and wear resistance, of a Cu-TiO2, CaP and TiN coating were investigated in this study. A scratch test and a standard adhesive test were used to determine the bonding strength of the coatings. To analyse the wear resistance a modified special testing machine was used to evaluate wear with PU-foam and PMMA as counterparts. The investigations showed that all coatings have greater bonding strengths than the minimum required 22 N/mm2 for medical implant coatings. Significant differences in total wear were determined during the wear tests. With the exception of the CaP no removal of the coatings was detected.
Marcelo Prado and Cecília Zavaglia
A. Fritsche et al., "Mechanical Properties of Anti-Infectious, Bio-Active and Wear Resistant Ceramic Implant Surface Coatings", Key Engineering Materials, Vols. 396-398, pp. 357-360, 2009