Table 1 The CIE L*, a*, and b* chromatic parameters, and ΔE values for different groups following MTA treatment

Control

10

78.45 (1.62)

75.48 (2.16)

76.09 (2.02)

74.53 (1.91)

ProRoot

10

80.15 (1.78)

75.01 (1.72)

73.27 (1.77)

69.71 (1.65)

Retro

10

80.69 (1.45)

78.96 (1.94)

78.28 (1.30)

77.13 (1.65)

DBA + ProRoot

10

78.65 (1.27)

75.29 (1.69)

73.44 (1.36)

72.70 (1.66)

DBA + Retro

10

78.08 (1.15)

75.65 (1.61)

74.51 (1.03)

74.91 (1.11)

Baseline

1 week

4 weeks

12 weeks

Groups

n

a₀

a₁

a₂

a₃

Control

10

3.43 (0.91)

2.94 (0.87)

3.11 (0.82)

2.27 (0.77)

ProRoot

10

3.52 (0.85)

2.41 (0.90)

1.40 (0.71)

1.03 (0.69)

Retro

10

2.73 (0.65)

2.73 (0.85)

2.09 (0.70)

2.01 (1.09)

DBA + ProRoot

10

2.78 (0.59)

2.25 (0.61)

1.62 (0.51)

1.42 (0.69)

DBA + Retro

10

2.95 (0.66)

2.33 (0.79)

2.29 (0.92)

2.62 (0.90)

Baseline

1 week

4 weeks

12 weeks

Groups

n

b₀

b₁

b₂

b₃

Control

10

19.57 (1.73)

20.81 (1.29)

19.56 (1.47)

22.55 (1.23)

ProRoot

10

18.05 (1.75)

17.6 (2.78)

17.23 (2.31)

16.91 (2.52)

Retro

10

17.54 (2.93)

19.49 (3.50)

19.82 (4.55)

21.43 (3.46)

DBA + ProRoot

10

16.83 (2.08)

17.06 (2.11)

19.83 (2.36)

18.7 (2.89)

DBA + Retro

10

17.83 (1.83)

20.89 (2.08)

22.89 (1.93)

22.73 (2.22)

ΔE value

1 week

4 weeks

12 weeks

Groups

n

ΔE₁

ΔE₂

ΔE₃

Control

10

7.65 (5.28)^a

6.66 (5.47)^a

16.41 (8.07)^a

ProRoot

10

16.05 (10.05)^ab

27.98 (10.63)^b

61.45 (24.08)^b

Retro

10

10.97 (9.20)^a

21.87 (13.13)^b

19.30 (12.02)^a

DBA + ProRoot

10

7.06 (4.86)^a

20.55 (7.30)^b

23.88 (10.65)^a

DBA + Retro

10

5.15 (5.03)^ac

8.40 (8.19)^a

16.69 (8.97)^a