Antimicrobial and Mechanical Properties of Orthodontic Acrylic Resin Containing Zinc Oxide and Titanium Dioxide Nanoparticles Supported on 4A Zeolite

Table 2

Initial concentration and concentrations of the three bacterial strains in suspensions after 24 h of contact with differently modified samples (colony formed unit/mL).

		Bacteria strain
		E. coli	S. mutans	K. pnemoneai
Initial concentration (CFU/mL)
Concentration after 24 h (CFU/mL)	ZnO/TiO2/4A 2% (G1)	0	0	0
	ZnO/4A2% (G2)	0	0
	TiO2/4A (G3)	0	0
	ZnO/TiO2/4A4% (G4)	0	0	0
	TiO2/4A4 (G5)	0	0	0
	ZnO/4A4% (G6)	0	0	0
	Control (G7)