Treatment of various degrees of white spot lesions using resin infiltration—in vitro study

Progress in Orthodontics

Table 2 Comparison between the mean ΔE (T2-T0) following various resin infiltration protocols of the WSLs in enamel and the threshold of clinical detection

Shallow enamel (n = 24)		Mean ΔE	SD	Critical value ΔE	t	P value
Resin infiltration protocols	EA (n = 6)	1.619	0.848	3.7	− 8.14	0.000**
	EAA (n = 6)	2.404	0.625		− 6.88	0.000**
	EEA (n = 6)	2.472	0.798		− 5.10	0.000**
	EEAA (n = 6)	2.993	1.334		− 1.76	0.109
Deep enamel (n = 24)
Resin infiltration protocols	EA (n = 6)	2.418	0.308		− 13.80	0.000**
	EAA (n = 6)	1.952	0.397		− 14.60	0.000**
	EEA (n = 6)	2.979	0.814		− 2.94	0.015*
	EEAA (n = 6)	3.146	0.931		− 1.97	0.077

*Significant at a P value < 0.05; **significant at a P value < 0.001; (n) sample size