Effect of Load Cycling on the Fracture Strength/Mode of Teeth Restored with FRC Posts or a FRC Liner and a Resin Composite

Table 3

The frequency of the failure modes identified. Type I: failure of remaining tooth crown walls only; Type II: failure of restoration only; Type III: mixed failure (I+II); Type IV: root fracture.

Group	Type I	Type II	Type III	Type IV
A	-	-	4 (40%)	6 (60%)
B	5 (50%)	-	5 (50%)	-

In all specimens this failure mode was combined with type III crown failures.
In two specimens fracture and debonding of the FRC composite occurred.