Effect of Cavity Design on the Strength of Direct Posterior Composite Restorations: An Empirical and FEM Analysis

Table 3

Strength of experimental groups.

Group	Sub-group	𝑛	Mean Strength (MPa)	Standard deviation	% improvement
I	A	10	33	2.25918	33
	A	10	49	2.34434
II	B	10	21.25	2.79466	57
	B	10	49.49	3.48038