Chemical Etching of Ultrafine Grained Titanium Surfaces to Optimise Cell Attachment

This is the authors' abstract. We don't add key points for this paper.

The goal of this research was to create a surface topography that would promote cell attachment onto Ultrafine-grained Grade 2 Titanium. Morphologies that assist the deposition of bone tissue and reduce colonisation by unwelcome bacteria onto dental implant surfaces are created most often by sand-blasting, chemical etching, or these two in combination. Discs of thickness 2 mm from the machined base material were prepared for this study. After machining, the samples were chemically etched. Three etchants were used: 30 % HCl and 85% H3PO4, and the two in combination. The etching temperatures were 20 °C, 40 °C, and 60 °C, the etching times were 5 minutes and 120 minutes. The surface morphologies of the discs were examined by confocal microscope and scanning electron microscope (SEM), and compared to the machined-only samples as reference values. Samples treated in the 30% HCl solution at 40 °C for 120 minutes and then in the 85 % H3PO4 solution at the same temperature and time altered macro and micromorphology together in ways which assist the attaching of bone.