Table 4: Failure modes in 3 dowel groups; glass fiber dowel, indirect resin dowel and pre-fabricated dowel with indirect resin crown.

Failure Mode	1	2	3	4	5	P-value
Glass fiber dowel	6	1	0	0	0	0.112
Indirect resin dowel and core	4	3	0	0	0
Prefabricated metal dowel	5	2	0	0	0
Total	15	6	0	0	0	-