Table 1.

The mean survival of human periodontal ligament fibroblasts as measured by methyl-thiazol-diphenyl-tetrazolium assay after exposure to various dilutions of curcumin for 48 h

Concentration (%)	Optical density at 450 nm	Cell viability (%)
100	1.75367±0.04	111.75
50	1.76567±0.07	112.50
25	1.79533±0.07	114.40
Control	1.56933±0.25	100