Reinforcement of PMMA Denture Base Material with a Mixture of ZrO₂ Nanoparticles and Glass Fibers

Table 2

Tukey–Kramer multiple-comparison test for flexural strength (MPa) and impact strength (kJ/m²) of denture base resins showing mean ± SD and groups with significant differences.

Groups	Flexural strength (MPa); Mean ± SD	Impact strength (kJ/m^2); Mean ± SD
Control	64.52 ± 5.76	3.89 ± 0.46^a
A	75.16 ± 6.95^a	3.80 ± 0.71^b,c
B	77.63 ± 5.65^a	3.44 ± 0.82^b
C	85.82 ± 6.96^b	3.30 ± 0.65^c,d
D	94.05 ± 6.95	3.24 ± 0.64^d
E	83.28 ± 5.32^b	2.77 ± 0.92^b
F	75.55 ± 6.23^a	2.37 ± 0.46^e
G	68.21 ± 7.76	1.99 ± 0.63^a,e

Multiple comparison tests for all pairwise differences between the means. Groups with similar letters are not significantly different from each other.