Table 1.
Comparison of compressive strength among study groups
| Groups | Sample size | Mean (n) | SD | 95% CI for mean | P | |
|---|---|---|---|---|---|---|
|
| ||||||
| Lower bound | Upper bound | |||||
| I (intact teeth) | 11 | 2294±0.06 | 236±0.80 | 2134±0.98 | 2453±0.15 | 0.001* |
| II (beautifil II LS) | 11 | 1708±0.72 | 236±0.17 | 1550±0.06 | 1867±0.39 | 0.001* |
| III (prevest fusion universal) | 11 | 825±0.38 | 102±0.82 | 756±0.30 | 894±0.45 | 0.001* |
| IV (GC everX Posterior) | 11 | 1195±0.82 | 354±0.86 | 957±0.42 | 1434±0.22 | 0.001* |
*Significant difference at P≤0.05. SD: Standard deviation, CI: Confidence interval