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Five different treatment regimen groups were investigated. Sample groups A, B and D received a sequence of three treatments divided over three phases.
| Group | Phase 1 | Phase 2 | Phase 3 |
|---|---|---|---|
| A | 9h light only | 10h 6% H2O2 gel only | 6h light & 6% H2O2 |
| B | 9h 6% H2O2 gel only | 10h light only | 6h light & 6% H2O2 |
| C | 11h light & 6% H2O2 | ||
| D | 8.75h 25% H2O2 gel only | 10h light only | 6h light & 25% H2O2 |
| E | 10.75h light & 25% H2O2 |
