Table 2.

Viable cell counts of C. albicans, L. acidophilus and S. mutans biofilms in non-UV activated resin and following activation with UV irradiation in a conventional denture base acrylic resin containing 0% (control), 2.5% and 5% titania nanotubes

Microbial strains (CFU mL -1 ) (mean ± SD)
Groups	Non UV irradiated samples			UV irradiated samples
	C. albicans	L. acidophilus	S. mutans	C. albicans	L. acidophilus	S. mutans
Control	6.43 ± 0.020a	6.36 ± 0.036cd	6.20 ± 0.020fg	6.33 ± 0.057	6.28 ± 0.036d	6.17 ± 0.024g
TiO2-2.5%	6.36 ± 0.016a	6.27 ± 0.020c	6.13 ± 0.013f	6.14 ± 0.027	6.02 ± 0.017e	5.86 ± 0.076
TiO2-5%	6.18 ± .040b	6.07 ± 0.034e	5.99 ± 0.038	4.86 ± 0.083b	4.46 ± 0.141	4.39 ± 0.080

The same letters denote the groups which have not statistically significant differences.

albicans.

acidophilus.

^a p = 0.133 for the difference between biofilm formation on non-UV-irradiated TiO -2.5% and control samples of C. albicans.

^b p = 0.706 for the difference between biofilm formation on non-UV-irradiated TiO -5% and UV irradiated samples of TiO -5% of C.

^c p = 0.341 for the difference between biofilm formation on non-UV-irradiated TiO -2.5% and control samples of L. acidophilus.

^d p = 0.497 for the difference between biofilm formation on non-UV-irradiated and UV irradiated control samples of L. acidophilus.

^e p = 0.746 for the difference between biofilm formation on non-UV-irradiated TiO 5% and UV irradiated TiO -2.5% samples of L.

^f p = 0.248 for the difference between biofilm formation on non-UV-irradiated TiO -2.5% and control samples of S. mutans.

^g p = 0.956 for the difference between biofilm formation on non-UV-irradiated and UV irradiated control samples of S. mutans.