Table 3.

Mean values ± SD of Brinell hardness

Material	Initial Brinell Hardness	Brinell Hardness after 1 year
PMMA	150.22 ± 1 A a	140.4 ± 1.4 A b
PMMA + gel 1 with citrate	150.22 ± 1 A a	143.3 ± 2.2 B a
PMMA + gel 2 with PVP	150.22 ± 1 A a	139.1 ± 2.2 C b
PMMA + Curasept 0.5%	150.22 ± 1 A a	143.1 ± 2.1 B a
PMMA + Curasept 1%	150.22 ± 1 A a	141.6 ± 1.53 D b

Lowercase letters in rows and capital letters in columns denote statistically significant differences with p ≤ 0.05.