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Table 3 Distribution of fracture modes according to groups

From: The effect of the different restorations on fracture resistance of root-filled premolars

Groups Fracture Modes p
Unrestorable Restorable
Group 1 (Positive control)A 0 (0)a 11 (34.4)b 0.004
Group 2 (Negative control)AB 5 (21.7)a 6 (18.8)a
Group 3 (Composite resin)AB 3 (13)a 8 (25)a
Group 4 (Fiber+composite resin)B 7 (30.4)a 4 (12.5)a
Group 5 (Ceramic Inlay)B 8 (34.8)a 3 (9.4)b
Total 23 (100) 32 (100)  
  1. Same superscript uppercase letters indicate statistically similar values within each column (p > 0.05). Same superscript lowercase letters indicate statistically similar values within each row (p > 0.05)