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Drug release profiles of curcumin, vitamin K2, and curcumin + vitamin K2 from plasma-sprayed HA-coated Ti implant for 22 days: (a) in vitro release of curcumin and vitamin K2 individually and in the presence of each other under pH 5.0 and cumulative release kinetics of curcumin (b) and vitamin K2 (c), respectively, fitted with the Korsmeyer–Peppas model (p ≤ 0.05).
