The colour codes symbolize the mean levels of cytokine release from supernatants obtained from 10 anonymous healthy donors:
red = high; black = intermediate; green = low.
Co-Cr = cobalt-chromium; W280 = Wirobond 280®; Rc = Remanium® Star; Rm = Remanium® Star MDII; Rlm = Remanium® Star CL; Zz = Zirkonzahn® Sintermetall; CpTi4 = commercially pure titanium grade 4; Ti-6Al-4V = titanium alloy grade 23.