Table 1 Description of color distributions on tooth level (n = 120)

 Lightness^a

T₀

1.93

0.72

2 (1–2)

1.84

0.75

2 (1–2)

0.170

T₁

2.02

0.83

2 (2–2)

1.96

0.94

2 (1–2)

T₂

2.06

0.73

2 (2–2)

1.98

0.73

2 (2–2)

 Chroma^b

T₀

2.45

0.40

2.5 (2.0–2.5)

2.38

0.35

2.5 (2.0–2.5)

0.018

T₁

2.48

0.39

2.5 (2.0–2.5)

2.39

0.38

2.5 (2.0–2.5)

T₂

2.54

0.39

2.5 (2.5–3.0)

2.48

0.39

2.5 (2.0–2.5)

 L*

T₀

61.8

2.6

61.7 (61.3–65.0)

62.0

2.7

61.8 (61.3–65.0)

0.388

T₁

61.5

3.0

61.6 (61.3–61.8)

61.6

3.3

61.6 (61.3–65.0)

T₂

61.4

2.5

61.6 (61.3–61.8)

61.6

2.5

61.6 (61.3–61.8)

 C*_ab

T₀

12.1

2.1

11.8 (8.7–14.3)

11.7

2.6

11.8 (8.7–13.5)

0.042

T₁

12.3

2.0

13.5 (10.1–14.3)

11.9

2.1

12.6 (8.7–14.3)

T₂

12.7

1.7

13.5 (11.8–14.3)

12.2

1.9

11.8 (10.1–14.3)

 ΔE

T₀ – T₁

2.10

2.57

0.90 (0.00–4.22)

2.46

2.82

1.88 (0.00–4.42)

T₁ – T₂

2.15

2.54

1.88 (0.00–4.36)

2.35

2.50

1.88 (0.00–4.36)

T₀ – T₂

1.80

2.21

0.90 (0.00–3.48)

1.86

2.17

1.01 (0.00–3.60)

 d(OM1)

T₀

13.9

3.8

13.7 (9.2–15.8)

13.5

3.9

13.7 (9.2–15.4)

0.038

T₁

14.3

4.1

15.3 (12.5–15.8)

13.9

4.5

15.3 (9.2–15.8)

T₂

14.6

3.7

15.3 (13.7–15.8)

14.1

3.8

14.5 (12.5–15.8)

 L*

T₀

58.1

2.1

58.4 (56.8–59.7)

58.4

2.1

58.4 (57.1–59.7)

0.004

T₁

57.8

2.4

58.4 (55.8–59.7)

58.1

2.4

58.4 (57.1–59.7)

T₂

57.7

2.3

57.1 (55.8–59.7)

58.1

2.0

58.4 (57.1–59.7)

 C*_ab

T₀

12.4

2.1

12.3 (11.0–13.6)

12.2

2.1

12.3 (11.0–13.6)

0.031

T₁

12.7

2.4

12.3 (11.0–14.9)

12.4

2.6

12.3 (11.0–13.6)

T₂

12.9

2.0

13.6 (11.0–14.9)

12.5

2.3

12.3 (11.0–13.6)

 ΔE

T₀ – T₁

1.63

1.79

1.81 (0.00–1.87)

1.74

1.78

1.87 (0.00–1.87)

T₁ – T₂

1.45

1.65

1.81 (0.00–1.87)

1.65

1.80

1.87 (0.00–1.91)

T₀ – T₂

1.61

1.62

1.87 (0.00–1.87)

1.39

1.42

1.84 (0.00–1.87)