Accelerated Aging Effects on Color Change, Translucency Parameter, and Surface Hardness of Resin Composites

Table 6

Means and standard deviations for surface hardness of the tested materials.

Resin composites	Before AAA	After AAA	Total (composite)
Filtek Z250	89.25 (2.09)^A	104.06 (4.03)^A	96.65 (8.14)^a
Tetric N-Ceram	47.60 (1.84)^B	66.13 (1.55)^B	56.87 (9.53)^b
Charisma Smart	51.96 (2.15)^C	67.36 (1.58)^B	59.66 (8.01)^c
Herculite Classic	59.76 (0.99)^D	69.92 (1.42)^C	64.84 (5.28)^d
Escom100	49.70 (1.50)^E	75.64 (1.40)^D	62.67 (9.20)^e
Total (AAA)	59.65 (15.53)^a	76.62 (14.34)^b	68.14 (17.16)

?Different lower letters represent statistically significant differences from before and after total hardness values in each row (main effect; AAA). Different lower letters represent statistically significant differences from total composites hardness values in each column (main effect; composite). ^A-EThere is no difference between the same capital letter (interaction; AAAcomposite).