Biological Effects of Anodic Oxidation on Titanium Miniscrews: An In Vitro Study on Human Cells

• Auteurs principaux: Giorgio Iodice (Auteur), Giuseppe Perinetti (Auteur), Bjorn Ludwig (Auteur), Elena V. Polishchuk (Auteur), Roman S. Polishchuk (Auteur)
• Format: Livre
• Publié: MDPI AG, 2019-11-01T00:00:00Z.
• Sujets: article
• Accès en ligne: Connect to this object online.
• Notes: 2304-6767; 10.3390/dj7040107
• Keywords: titanium; anodic oxidation; miniscrews; orthodontics; cell growth; Dentistry; RK1-715
• Source: Dentistry Journal, Vol 7, Iss 4, p 107 (2019)

This controlled in vitro study compared the effects of varying the thickness of a TiO₂ layer on cellular activity using commercially available miniscrew samples with identical surface features to derive information with direct clinical impact. Titanium grade V plates with four different thicknesses of TiO₂ layer/color were used: absent/gray (Control group), 40−50 nm/pink (Pink group), 130 nm/gold (Gold group) and 140 nm/rosé (Rosé group). In vitro experiments used Saos-2 cells and included cell growth analysis, phospho-Histone H3 and procollagen I staining, cell viability analysis, and a cell migration assay at 12, 24, 40 and to 48 h. Few differences were seen among the groups, with no clear behavior of cellular activity according to the TiO₂ thickness. The Control group showed a greater cell count. Phospho-Histone H3 staining was similar among the groups and procollagen I staining was greater in the Rosé group. Cell viability analysis showed a significant difference for live cell counts (greater in the Rosé group) and no difference for the dead cell counts. The cell migration assay showed a delay for the Rosé group up to 40 h, where full repopulation of cell-free areas was obtained at 48 h. The results suggest that the TiO₂ layers of the commercial miniscrews have minimal biological effects, including cytotoxicity, with possibly negligible or minimal clinical implications.