Table 2. Comparison of micro-leakage between two different methods in the specimens evaluated (n = 31) .

Curing light unit	Mean ±SD	Median	Dye penetration score
			0		1		2		3
			n	%	n	%	n	%	n	%
Halogen	1.32±1.24	1	12	38.7	5	16.12	6	19.35	8	25.8
Plasma arc	1.58±1.28	2	10	32.25	4	12.9	6	19.35	11	35.48
Dye penetration score: 0: no dye penetration; 1: dye penetration limited to the outer half of the sealant; 2: leakage up to the inner half of the sealant; 3: dye penetration extending to the underlying fissure.