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Mean Bond Strength (MPa) values recorded for independent factor ‘Time’.
| Time (months) | Bond Strength (MPa) |
|---|---|
| 12 months | 20.9 (3.1) A |
| 6 months | 16.1 (4.4) B |
| NED | 17.6 (3.6) B |
Different letters show statistically significant difference in independent factor ‘Time’ (p<0.001; Tukey test). Standard deviations are shown in parentheses. 12 months: 12 months after expiration date. 6 months: 6 months after expiration date. NED: No expiration date.
