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Mean retentive forces (Mean) and standard deviations (SD) of the two different time groups (Months) expressed in Newtons. The values are based on pooling the material groups and storage media results for the two time groups.
| Months | Mean ± SD | N | Duncan Grouping |
| 0.5 | 1486.3 ± 547.7 | 18 | B |
| 12 | 2026.8 ± 891.8 | 18 | A |
N = number of samples
