Table 5.

Statistical comparison of the treatment groups versus the control group

	Visual examination	Radiographic examination	DIAGNOdent
APF	χ2: 11.896; P: 0.036*	χ2: 12.132; P: 0.007**	Z: −0.218; P: 0.827
Ozone	χ2: 20.017; P: 0.001**	χ2: 6.364; P: 0.095	Z: −1.377; P: 0.169
Antibacterial dentine bonding	χ2: 13.706; P: 0.018*	χ2: 5.430; P: 0.143	Z: −3.171; P: 0.002**
CPP-ACP	χ2: 14.683; P: 0.012*	χ2: 18.519; P: 0.001**	Z: −4.479; P: 0.001**

APF, acidulated phosphate fluoride gel; CPP-ACP, casein phosphopeptide amorphous calcium phosphate.

χ², chi-squared test; Z, Mann–Whitney U-test.

^**P < 0.05 **P < 0.01.