. Author manuscript; available in PMC: 2009 Mar 20.

Published in final edited form as: J Prosthet Dent. 2008 Oct;100(4):302–308. doi: 10.1016/S0022-3913(08)60210-3

Table II.

Mean (SD) mechanical properties evaluated

Property (Units)	L199	E-10	E-15	E-15+XL	E-20
Izod impact strength (kJ/m²)	4.56 (0.32)^A	4.59 (0.68)^A	4.52 (0.46)^A	4.69 (0.48)^A	4.28 (0.51)^A
Fracture toughness, KIC (MPa·m^1/2)	2.37 (0.21)^A	2.39 (0.23)^A	2.29 (0.18)^A	2.34 (0.22)^A	2.21 (0.23)^A
Work of fracture (kJ/m²)	0.99 (0.30)^B	1.27 (0.13)^A	1.15 (0.17)^AB	1.04 (0.18)^AB	0.94 (0.18)^B

For each property, values with same uppercase letters were not statistically different (P<.05; 1-way ANOVA and post hoc Tukey test).