Abstract
Silver (Ag)- and tantalum (Ta)-containing amorphous calcium phosphate (ACP) coating films were fabricated on titanium substrates by radiofrequency magnetron sputtering for biomedical applications. The sputtering targets were hot-pressed into 10 mol% Ag-containing ß-tricalcium phosphate sintered compacts with and without 8 mol% Ta. The fabricated ACP coating films were dense and smooth, with all elements distributed homogeneously along the depth direction. In addition, Ag existed as ions in the ACP regardless of the presence of Ta. The resorbability of the Ag-containing ACP coating films in simulated body fluids was suppressed by the addition of Ta. The concentration of detected Ag ions was higher in diluted nutrient broth solution than in Tris-HCl solution.
Highlights
To obtain rapid and strong fixa on of implants, we focused on amorphous calcium phosphate (ACP) coa ng films fabricated by radiofrequency (RF) magnetron spu ering on Ti implants [5,6,7,8,9], which have been reported to enhance the bone-forming ability because of its high bioresorbability [10,11]
The coating films were fabricated by RF magnetron sputtering using Ag-TCP and (Ta+Ag)-TCP targets; hereafter, the coating films are referred as Ag-ACP and (Ta+Ag)-ACP coating films, respectively
The XRD patterns of both Ag-ACP and (Ta+Ag)-ACP coating films indicated that the phase of the coating films was amorphous calcium phosphate within a broad peak at around 30o [5]
Summary
To obtain rapid and strong fixa on of implants, we focused on amorphous calcium phosphate (ACP) coa ng films fabricated by radiofrequency (RF) magnetron spu ering on Ti implants [5,6,7,8,9], which have been reported to enhance the bone-forming ability because of its high bioresorbability [10,11]. In order to evaluate the in vitro resorbability of Ag-containing ACP coa ng films with and without Ta, immersion tests were conducted in simulated body fluids (SBFs).
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