Figure 2. Effect of borate/boric acid on HCEC viability. Cells were incubated for 24 h with different concentrations of Unisol, a saline solution containing borate/boric acid. Viability was measured by 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and is expressed as a percentage relative to cells grown in the absence of a solution (control); n=3–4. The asterisk indicates significant difference from control, p<0.001.