Table 2.
L*, a*, and b* values of clear aligners at baseline (t0), after staining (t1), and after cleaning (t2) for each experimental group
| Timepoint | L* (Mean ± SD) | a* (Mean ± SD) | b* (Mean ± SD) | |
|---|---|---|---|---|
|
Group 1 ICC + 0 min |
Baseline (t0) | 86.31 ± 8.09A | 1.01 ± 0.55A | 3.98 ± 1.86A |
| After Staining (t1) | 83.64 ± 2.79AB | -1.41 ± 1.53B | 16.97 ± 4.41B | |
| After cleaning (t2) | 85.77 ± 3.87B | -0.45 ± 1.03B | 13.48 ± 2.56C | |
|
Group 2 ICC + 5 min |
Baseline (t0) | 81.23 ± 7.09A | 1.22 ± 0.54A | 3.37 ± 1.19A |
| After Staining (t1) | 83.83 ± 4.86AB | -0.81 ± 1.07B | 16.56 ± 4.04B | |
| After cleaning (t2) | 81.59 ± 5.95B | -1.31 ± 0.77B | 14.90 ± 3.02C | |
|
Group 3 ICC + 10 min |
Baseline (t0) | 78.26 ± 5.58A | 1.09 ± 0.76A | 3.87 ± 1.11A |
| After Staining (t1) | 81.32 ± 4.47AB | -0.48 ± 1.28B | 18.38 ± 3.23B | |
| After cleaning (t2) | 83.63 ± 4.21B | -1.33 ± 1.06B | 16.22 ± 2.34C | |
|
Group 4 CP + 0 min |
Baseline (t0) | 79.51 ± 6.06A | 1.27 ± 0.42A | 2.79 ± 1.65A |
| After Staining (t1) | 83.00 ± 3.15AB | -0.40 ± 1.34B | 19.71 ± 3.77B | |
| After cleaning (t2) | 85.07 ± 2.62B | -1.09 ± 1.03B | 16.14 ± 3.09C | |
|
Group 5 CP + 5 min |
Baseline (t0) | 82.08 ± 9.42A | 1.25 ± 1.01A | 3.53 ± 1.21A |
| After Staining (t1) | 84.22 ± 4.81AB | -0.12 ± 1.55B | 16.41 ± 4.10B | |
| After cleaning (t2) | 83.06 ± 3.16B | -0.94 ± 1.09B | 14.67 ± 3.64C | |
|
Group 6 CP + 10 min |
Baseline (t0) | 81.60 ± 6.13A | 1.43 ± 0.53A | 3.20 ± 1.36A |
| After Staining (t1) | 81.86 ± 5.56AB | 0.07 ± 1.48B | 17.82 ± 3.76B | |
| After cleaning (t2) | 85.14 ± 3.41B | -0.61 ± 1.11B | 14.28 ± 3.37C |
SD Standard deviation, ICC Invisalign Cleaning Crystals, CP Corega Proguard, 0 min No ultrasonic cleaning, 5 min 5 min of ultrasonic cleaning, 10 min 10 min of ultrasonic cleaning
Different uppercase superscript letters within the same group column indicate statistically significant differences over time based on Bonferroni pairwise comparisons