Electrochemical behavior of bioactive coatings on cp-Ti surface for dental application

Abstract

The surface characteristics and electrochemical properties of bioactive coatings produced by plasma electrolytic oxidation (PEO) with calcium, phosphorous, silicon and silver on commercially pure titanium were evaluated. PEO treatment produced a porous oxide layer, which improved the surface topography, and enriched the surface chemistry with bioactive elements, responsible for mimicking bone surface. The surfaces with higher calcium concentration presented antibacterial and biocompability properties with better responses for corrosion and barrier properties, due to the presence of rutile crystalline structure. PEO may be a promising surface treatment option to improve the electrochemical behavior of dental implants mitigating treatment failures.

Comparison between Plasma Electrolytic Oxidation Coating and Sandblasted Acid-Etched Surface Treatment: Histometric, Tomographic, and Expression Levels of Osteoclastogenic Factors in Osteoporotic Rats

“…Thus, the PEO surface coating was shown to be extremely promising and offered excellent performance in terms of bone repair, as demonstrated in the present study. This surface coating also has superior mechanical [2,17,18] and antimicrobial parameters [21,22,45]. Given the investigations into the favorable structural properties of the PEO surfaces of implants, which were corroborated in the present study by the biological responses of the bone-implant interface, we believe that the next steps include industrial production for human clinical studies.…”

“…PEO surface was prepared according to previous in vitro studies [21,22]. Briefly, the electrical circuit consisted of the following components: a pulse direct power supply with variable output voltage, a transformer, a rectifying circuit, a circuit breaker, an ammeter, and a voltmeter.…”

“…This electrochemical process gives titanium or its alloys mechanical and thermal superiority in addition to corrosive and tribocorrosive properties [2,[17][18][19]. Thus, electrolytic oxidation is a promising technique that involves simple steps and well-controlled chemical methods for producing bioactive micropores on implant surfaces [20][21][22]. In addition, Ca/P-incorporated PEO has exhibited antibacterial properties in microbiological tests and improved mesenchymal stem cell proliferation in cell culture tests [21,22].…”

Advanced Surface Treatments on Titanium and Titanium Alloys Focused on Electrochemical and Physical Technologies for Biomedical Applications

“…For instance, some previous studies on the generation of PEO coatings on Titanium alloys for biomedical implants have incorporated bioactive elements such as phosphorous and calcium on their composition to enhance their osseointegration and favor cell growth [113,116,117]. Also, the addition of other elements such as silver, copper, or fluoride to provide the coating with antibacterial ability has also been developed [113,[118][119][120].…”

“…Marques et al [118] developed coatings with calcium, phosphorous, silicon, and silver on commercially pure Titanium (Cp-Ti) used in dental implants. The higher presence of rutile in the coatings with higher calcium concentration presented better corrosion properties in AS, also showing antibacterial and biocompatibility properties.…”