Application of plasma Eeectrolytic oxidation coating on powder metallurgy Ti-6Al-4V for dental implants

Producción CientíficaTi-6Al-4V alloy obtained by powder metallurgy (PM) is a good candidate biomaterial in the manufacture of dental implants but its inherent porosity makes it have worse corrosion behavior than conventionally obtained alloys. In order to improve the corrosion and biological properties, surface modification technologies could be used. The plasma electrolytic oxidation (PEO) process is a novelty process successfully used in case of conventional titanium alloys. The present work investigates the e ect of PEO treatment on PM Ti-6Al-4V alloy using two electrolytes. Both coatings show good adherence and improved corrosion behavior in artificial saliva, the PEO coatings delivers a steady growth of corrosion resistance from day one until 90 days immersion. Highest corrosion resistance was shown in case of Ca/P enrichment PEO coatings. The cytocompatibility tests indicated these coatings seem to be appropriate to improve the bone osseointegration with proper porosity index.Ministerio de Educación y Ciencia (Plan Nacional: RTI2018-097990-B-I00)Financiación del Gobierno de España (grant MAT2016-78903-R)Junta de Castilla y León (grants VA275P18, VA044G19 and VA317P18)Interreg VA España Portugal POCTEP (grant 0624_2IQBIONEURO_6_E