Table 2.

Types of failure mode of different groups investigated.

Type of failure	Description of failure mode
Type 1	Cohesive failure within the post
Type 2	Adhesive failure between post and luting cement with no cement on post surface can be detected. This is considered total adhesive failure between post surface and the luting cement
Type 3	Cohesive failures within the luting cement where the luting cement covers all post surface and the simulated acrylic canal
Type 4	Adhesive failure between the luting cement and the simulated acrylic canal where the luting cement covers all post surface and no luting cement covers the simulated acrylic canal
Type 5	Mixed failure subtype-1 where the luting cement covers 25–50% of the post surface. This is regarded as predominantly adhesive failure between the post surface and the luting cement
Type 6	Mixed failure subtype-2 where the luting cement covers 75% of the post surface. This is regarded as minimal adhesive failure between the post surface and the luting cement