Comparison of the Ability of Two Brands of CBCT with That of SEM to Detect the Marginal Leakage of Class V Composite Resin Restorations

Table 3

Comparison of marginal leakage scores between New Tom CBCT unit and SEM.

		N	Mean rank	Sum of ranks	Z	Asymp. sig. (2-tailed)
SEM-New Tom CBCT	Negative ranks	4^a	3.38	13.50	−1.656^b	0.098
	Positive ranks	1^b	1.50	1.50
	Ties	11^c
	Total	16

^aSEM < New Tom CBCT. ^bSEM > New Tom CBCT. ^cSEM = New Tom CBCT.