Table 3.
Hardness ratios (standard deviations) of composite resin specimens light cured with light curing units covered with layers of an infection control barrier
LCU | Control | 1 Layer | 2 Layers | 4 Layers | 8 Layers |
FL2 | 89.8 (2.0)Aa | 88.2 (5.1)Aba | 84.5 (6.0)Aba | 83.4 (5.3)Ba | 76.4 (5.7)Ca |
O360 | 80.0 (5.2)Ab | 76.1 (4.4)Abb | 72.0 (5.2)BCb | 66.9 (4.7)Cb | 65.6 (6.2)Cb |
Values having the same capital letters in the rows and the same small letters in the columns are not statistically significant (p>0.05). LCU= light curing unit; FL2= Elipar FreeLight 2; O360= Optilux 360