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Mean, P value and percentage changes of microhardness from the 1st cycle of bleaching
| 2nd cycle of bleaching | 1st cycle of remineralization | 2nd cycle of remineralization | |
|---|---|---|---|
| Mean ± SD | 290 ± 16.6 | 304 ±.3 18.5 | 307 ± 17.4 |
| P value | P<0.05 S | P<0.01 S | P<0.01 S |
| Percentage change from first cycle of bleaching 296.2 ± 17.3 | 2% decrease | 2.5% increase | 3.24% increase |
S= Significant; SD= Standard deviation
