title: Stainless steel surface biofunctionalization with PMMA-bioglass coatings: compositional, electrochemical corrosion studies and microbiological assay.
abstract: A solution is proposed to surpass the inconvenience caused by the corrosion of stainless steel implants in human body fluids by protection with thin films of bioactive glasses or with composite polymer-bioactive glass nanostructures. Our option was to apply thin film deposition by matrix-assisted pulsed laser evaporation (MAPLE) which, to the difference to other laser or plasma techniques insures the protection of a more delicate material (a polymer in our case) against degradation or irreversible damage. The coatings composition, modification and corrosion resistance were investigated by FTIR and electrochemical techniques, under conditions which simulate their biological interaction with the human body. Mechanical testing demonstrates the adhesion, durability and resistance to fracture of the coatings. The coatings biocompatibility was assessed by in vitro studies and by flow cytometry. Our results support the unrestricted usage of coated stainless steel as a cheap alternative for human implants manufacture. They will be more accessible for lower prices in comparison with the majority present day fabrication of implants using Ti or Ti alloys.
authors.affiliation: Faculty of Electrical Engineering and Computer Science, Transilvania University of Brasov, 29 Eroilor Blvd, 500036, Brasov, Romania.
authors.forename: L
authors.initials: L
authors.lastname: Floroian
authors.forename: C
authors.initials: C
authors.lastname: Samoila
authors.forename: M
authors.initials: M
authors.lastname: Badea
authors.forename: D
authors.initials: D
authors.lastname: Munteanu
authors.forename: C
authors.initials: C
authors.lastname: Ristoscu
authors.forename: F
authors.initials: F
authors.lastname: Sima
authors.forename: I
authors.initials: I
authors.lastname: Negut
authors.forename: M C
authors.initials: MC
authors.lastname: Chifiriuc
authors.forename: I N
authors.initials: IN
authors.lastname: Mihailescu
mesh_terms: D001696:Biomechanical Phenomena; D049109:Cell Proliferation; D002470:Cell Survival; D002478:Cells, Cultured; D002516:Ceramics / Q000737:chemistry*; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D003343:Corrosion; D058266:Dielectric Spectroscopy; D055664:Electrochemical Techniques; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D019736:Prostheses and Implants; D017550:Spectroscopy, Fourier Transform Infrared; D013193:Stainless Steel / Q000737:chemistry*; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry
chemical_list: C022107:Bioglass; D020099:Coated Materials, Biocompatible; D013193:Stainless Steel; D019904:Polymethyl Methacrylate; D014025:Titanium