Table 1.

Comparison of microleakage of clinpro (unfilled) sealant among three techniques

Group	N	Mean	Std.† deviation	Kruskal–Wallis test χ2 (df = 2)	p
Acid etching (I)	40	0.57	0.747	16.07	0.001 HS***
Laser (II)	40	1.48	1.132
Fissurotomy (III)	40	0.75	0.742
				Mann–Whitney test Z	p
I vs II	40			3.7	0.001 HS***
I vs III	40			1.23	0.22 NS*
II vs III	40			2.90	0.004 Sig**

^†Standard

^*Statistically non-significant

^**Statistically significant

^***Statistically highly significant