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 4

Comparison of marginal leakage scores between Planmeca CBCT unit and SEM.

		N	Mean rank	Sum of ranks	Z	Asymp. sig. (2-tailed)
SEM-Planmeca CBCT	Negative ranks	6^a	3.50	21.00	−2.271^b	0.023
	Positive ranks	0^b	0.00	0.00
	Ties	10^c
	Total	16

^aSEM < Planmeca CBCT. ^bSEM > Planmeca CBCT. ^cSEM = Planmeca CBCT.