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Half lethal concentration (LC 50) values of all tested bleaching products (Opalescence® PF 10%, Philips ZOOM®! NiteWhite® 16%, Philips ZOOM®! DayWhite® 6%, Philips ZOOM®! 6%, Philips ZOOM®! 25%, Opalescence® Boost 40%, Philips Dash 30%) under incubation of L929 cells (A) and dental pulp cells (B). Statistical significance is highlighted by ∗p < 0.05 and ∗∗p < 0.001.
