Protective Effect of Alpha-Tocopherol Isomer from Vitamin E against the H₂O₂ Induced Toxicity on Dental Pulp Cells

Table 3

Percentage of viability of MDPC-23 cells treated with different alpha-tocopherol concentrations followed by exposure or not to hydrogen peroxide.

H2O2	Alpha-tocopherol concentrations
	0	1 mM	3 mM	5 mM	10 mM
0%	100.5 (97–104)^a,A,G1	94 (87–100)^ab,A,G3	87 (86–91)^bc,A,G4	90 (79–92)^bc,AB,G5	86 (77–88)^c,AB,G6
0.018%	41.5 (36–43.5)^a,B,G2	57 (52–60)^b,B,G7	68 (64–73)^bc,B,G8	75 (67–84)^c,A,G9	72.5 (69–78)^c,A,G10

Lowercase letters permit comparisons within rows while uppercase letters permit comparisons within columns. Groups identified with the same letters do not differ significantly (Mann-Whitney test, 𝑃>0.05).