Table 1.

Comparison of microleakage scores (mm) between enamel-adhesive and adhesive-bracket interfaces in buccolingual sections^a

Margin	N	Groupb	Enamel-adhesive		Adhesive-bracket		P value
			Mean	SD	Mean	SD
Incisal	15	1	0.18	0.10	0.13	0.19	.066	NS
	15	2	0.16	0.16	0.13	0.12	.475	NS
	15	3	0.18	0.10	0.14	0.12	.125	NS
	15	4	0.12	0.10	0.12	0.13	.553	NS
Gingival	15	1	0.21	0.18	0.18	0.22	.476	NS
	15	2	0.40	0.16	0.35	0.14	.142	NS
	15	3	0.21	0.09	0.21	0.13	.556	NS
	15	4	0.34	0.14	0.26	0.09	.056	NS

^aN indicates sample size; SD, standard deviation; S, significant; NS, not significant

^bGroup 1: Acid etching + direct illumination; Group 2: Acid etching + transillumination; Group 3: Self etching primer + direct illumination; Group 4: Self etching primer + transillumination.