Table 2. The effect of cement type and abutment diameter on the coping retention (Two-way ANOVA).
| Source | Type III Sum of Squares | df | Mean Square | F | Sig. |
|---|---|---|---|---|---|
| Corrected Model | 1.16886 | 7 | 166900.583 | 13.401 | .000 |
| Intercept | 6219167.828 | 1 | 6219167.828 | 499.342 | .000 |
| Cement | 1039734.469 | 3 | 346578.156 | 27.827 | .000a |
| Diameter | 100336.814 | 1 | 100336.814 | 8.056 | .006b |
| Cement * Diameter | 8837.691 | 3 | 2945.897 | .237 | .871c |
| Error | 871830.201 | 70 | 12454.717 | ||
| Total | 8186790.630 | 78 | |||
| Corrected Total | 2040134.281 | 77 |
a,b: Cement type and diameter significantly affect the retention of metal copings, c: Cement type and abutment diameter don't show any interactions.