Dowel & Core material Group Mean SD P-value   Group 1 Intact  Teeth 1029.4c 67.1 <0.001* Group 2 Reduced teeth 803.4d 30.1 Group 3 Reduced _ minim Rt canal access 891.7d 19.3 Ceramic dowel and core (E.max) Group 4 Parallel Tapered- E.max Ceramic 1088c 29.3 Group 5 Tapered E.maxCeramic 1434.4a 28.4 Group 6 Parallel E.max Ceramic 1314.4b 53.7 Composite core and Fiber Dowel Group 7 Dowelec-PT-Composite 512.3e 16.2 Group 8 Rely X-Tapered-Composite 545e 45.1 Group 9 Lux -Parallel - Composite 542.9e 22.8 *: Significant at P ≤ 0.05, Means with different letters are statistically significantly different according to Tukey’s test. Table1 shows that sound teeth recorded higher fracture resistance values than sound reduced teeth and endodontically treated teeth with minimal access. No statistically significant difference appeared between the mean values of reduced sound teeth and endodontically treated teeth with minimal access. Tapered ceramic group displayed the highest significant mean resistance values within the ceramic groups followed by the parallel and parallel tapered groups. Finally, the fiber and composite groups showed statistically similar results.

Table 1: ANOVA and Tukey’s tests for the comparison of Fracture resistance - Means between the nine groups