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Spreading of groups evaluated in the study.
| Group | Description |
|---|---|
| Control | 16% carbamide peroxide |
| TiO2 50%/10 min | 50% TiO2 solution with photocatalysis for 10 min |
| TiO2 50%/50 min | 50% TiO2 solution with photocatalysis for 50 min |
| TiO2 10%/10 min | 10% TiO2 solution with photocatalysis for 10 min |
| TiO2 10%/50 min | 10% TiO2 solution with photocatalysis for 50 min |
