applied sciences Article One-Step Liquid Phase Polymerization of HEMA by Atmospheric-Pressure Plasma Discharges for Ti Dental Implants Judit Buxadera-Palomero 1,2,3, Katja Fricke 4,* , Stephan Reuter 4,5,† , Francisco Javier Gil 6 , Daniel Rodriguez 1,2,3 and Cristina Canal 1,2,3,* ...