Tribocorrosion Susceptibility and Cell Viability Study of 316L Stainless Steel and Ti6Al4V Titanium Alloy with and without DLC Coatings
Author:
Sene Ana Claudia1, Pereira da Silva Michely Glenda12, Macário Paulo Fabrício1ORCID, Vieira Angela Aparecida1, Leite Priscila Maria Sarmeiro Correa Marciano1, da Silva Newton Soares1ORCID, Marques Francisco Das Chagas3ORCID, Vieira Lúcia1ORCID
Affiliation:
1. Instituto de Pesquisa e Desenvolvimento, Universidade do Vale do Paraíba (IP&D/UNIVAP), São José dos Campos 12244-000, SP, Brazil 2. Departamento de Biociências e Diagnóstico Bucal, Instituto de Ciência e Tecnologia, Universidade Estadual Paulista, São José dos Campos 12245-000, SP, Brazil 3. Instituto de Física, Universidade Estadual de Campinas, Campinas 13083-859, SP, Brazil
Abstract
Stainless steel (SS316L) and titanium alloy (Ti6Al4V) exhibit suitable properties for biomedical applications; however, the tribocorrosion of these materials, which is associated with metallosis, is still a significant concern. This work investigates the effectiveness of DLC smoothing coatings applied to the metals to reduce tribocorrosion and improve cell viability. The study was motivated by many reports of metallosis caused by metal debris in the soft tissues of the body. DLC coatings were produced using the plasma-enhanced chemical vapor deposition (PECVD) technique. The cytotoxicity, genotoxicity, and cell viability of metallic samples with and without DLC coatings were analyzed, considering the chemical composition of the coating and metallic components. The results show that the DLC coatings presented suitable interaction properties and no cytotoxicity or genotoxicity when exposed to the cellular environment, compared with the control group (p < 0.0001). They also demonstrated cell viability, low friction representing a reduction of 80%, and hardness 23–26 GPa, making them ideal for use on fixed implants. It is necessary to control the thickness and roughness of the coating to avoid pinholes and increase the corrosion protection of implants. These DLC coatings with low friction coefficients could facilitate the fixation of implantable pins and screws, including Kirschner wires.
Funder
São Paulo State Research Foundation Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Conselho Nacional de Desenvolvimento Científico e Tecnológico
Subject
Materials Chemistry,Surfaces, Coatings and Films,Surfaces and Interfaces
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