| |
Time point
|
Gingival (S1)
|
Body (S2)
|
P value
|
|---|
|
Mean
|
Gmd
|
Median (1st – 3rd quartile)
|
Mean
|
Gmd
|
Median (1st – 3rd quartile)
|
|---|
|
3D system
|
|
Lightnessa
|
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)
| |
|
Chromab
|
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)
| |
|
2D systemc
|
|
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)
| |
- a3D lightness values were assessed on a six-point integer scale from 0 to 5
- b3D chroma values were assessed on a three-point scale from 1 to 3 at half points
- c2D second shade designation numbers were assessed on a five-point scale at quarter points
- Gmd denotes Gini’s mean difference (see statistical methods)
