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

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

  Adjacent sound enamel T0 T1 ΔE1 (T0–T1) T2 ΔE2 (T0–T2) T3 ΔE3 (T0–T3)
a b a b a b a b a b
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**
  1. Statistical tests: intergroup comparison—independent Student’s t test
  2. a red-green axis, b yellow-blue axis, ΔE colour changes, T0 before intervention, T1 immediate after intervention, T2 3 months, T3 6 months
  3. **p < 0.01