Table 2.

Comparisons between groups based on the strength of shear bonds in different groupings

Comparison	Mean variation	p
I vs II	6.52	0.001**
I vs III	4.78	0.034**
I vs IV	2.32	0.785*
II vs III	-1.74	0.012**
II vs IV	-4.2	0.001**
III vs IV	-2.46	0.012**

**significant, *non-significant