Comparative evaluation of Icon® resin infiltration and Clinpro™ XT varnish on colour and fluorescence changes of white spot lesions: a randomized controlled trial

Progress in Orthodontics

Table 3 a and b values and intergroup comparison of colour changes at various time intervals

	Adjacent sound enamel		T₀		T₁		ΔE₁ (T₀–T₁)	T₂		ΔE₂ (T₀–T₂)	T₃		ΔE₃ (T₀–T₃)
	a	b	a	b	a	b	ΔE₁ (T₀–T₁)	a	b	ΔE₂ (T₀–T₂)	a	b	ΔE₃ (T₀–T₃)
Icon® resin infiltration	0.20 ± 1.54	26.30 ± 7.78	0.026 ± 1.76	18.39 ± 5.31	− 0.29 ± 1.38	21.47 ± 7.32	5.68 ± 1.24	− 0.37 ± 1.18	21.41 ± 6.11	7.19 ± 1.17	− 0.57 ± 1.71	23.34 ± 10.93	9.66 ± 1.42
Clinpro™ XT varnish	− 0.37 ± 1.14	24.08 ± 5.85	− 0.51 ± 1.41	17.71 ± 4.08	− 0.58 ± 1.23	19.58 ± 6.89	4.61 ± 1.13	− 0.63 ± 1.06	20.74 ± 6.66	7.68 ± 1.12	− 1.03 ± 1.49	23.74 ± 6.66	10.59 ± 1.21
Inter group comparison of colour changes							0.000**			0.001**			0.000**

Statistical tests: intergroup comparison—independent Student’s t test
a red-green axis, b yellow-blue axis, ΔE colour changes, T₀ before intervention, T₁ immediate after intervention, T₂ 3 months, T₃ 6 months
**p < 0.01