Antimicrobial Treatment of Dental Osseous Defects with Silver Doped Bioglass: Osteoblast Cell Response
In dentistry, chronic periodontitis often leads to bone resorption together with an increasing risk of bacteremia. Bioactive glass has found extensive application as dental graft material. A successful antimicrobial bactericidal effect has been shown from the introduction of Ag2O into the glass composition. In this study, the cytotoxicity of soluble silver, calcium and silica ions on primary human osteoblasts was investigated by measurements of mitochondrial activity and neutral red dye uptake. Silver concentrations of 4 - 6 ppm (1 mg/ml conc.) and 6 - 9 ppm (2 mg/ml conc.) have been measured in complete culture medium. It was found that the bioactive gel-glass extract with an initial concentration of 1 mg/ml (1mg glass per ml of culture medium) has no negative effect, whereas increased gel-glass concentration of 2 mg/ml seemed to have a toxic effect on the cell viability of human osteoblasts. It might be concluded that a reduction of the rate of silver dissolution from the bioactive gel-glass might preserve a maximum cell viability.
Panjian Li, Kai Zhang and Clifford W. Colwell, Jr.
U. Lohbauer et al., "Antimicrobial Treatment of Dental Osseous Defects with Silver Doped Bioglass: Osteoblast Cell Response ", Key Engineering Materials, Vols. 284-286, pp. 435-438, 2005