|About this Abstract
|2020 TMS Annual Meeting & Exhibition
|Coatings and Surface Engineering for Environmental Protection II
|Elucidating the Degradation Mechanisms of Ti-6Al-4V Dental Implants
|Xin Chen, Kumar Shah, Shiqi Dong, Lars Peterson, Erika La Plante, Gaurav Sant
|On-Site Speaker (Planned)
Titanium alloys (e.g., Ti-6Al-4V alloy) are often used as dental implants due to their suitable durability in oral environments. This study elaborates upon degradation processes undergone by a failed commercial implant, revealing crevice corrosion of the Ti-6Al-4V abutment as the potential cause for bone loss. Because fluorides, which are common additives in dental products, can induce the buildup of aggressive F- ions in crevice environments, the failure mechanism is further rationalized by evaluating the alloy’s electrochemical behavior in fluoride-containing solutions. The electrochemical responses were embodied by topographical evolution revealed using vertical scanning interferometry. Interestingly, a reversal in preferential corrosion of the α-phase to the β-phase, under conditions of applied potentials was observed. These findings elucidate the degradation mechanisms of the Ti-6Al-4V alloy in simulated biological fluids, reveal the releasing behavior of corrosion by-products, so that provide insights to means improving the longevity of commercial Ti-6Al-4V implants.
|Planned: Supplemental Proceedings volume