metals Opinion Osseoconductive and Corrosion-Inhibiting Plasma-Sprayed Calcium Phosphate Coatings for Metallic Medical Implants Robert B. Heimann ID Am Stadtpark 2A, D-02826 Görlitz, Germany; robert.heimann@ocean-gate.de; Tel.: +49-(0)-3581-667851 Received: 25 August 2017; Accepted: 22 ...