Table 2.

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

Margin	N	Groupb	Enamel-adhesive		Adhesive-bracket		P value
			Mean	SD	Mean	SD
Mesial	15	5	0.19	0.18	0.18	0.15	.783	NS
	15	6	0.14	0.13	0.17	0.15	261	NS
	15	7	0.03	0.04	0.16	0.16	.018	S
	15	8	0.07	0.10	0.17	0.14	.054	NS
Distal	15	5	0.22	0.21	0.26	0.22	.414	NS
	15	6	0.13	0.15	0.14	0.16	.767	NS
	15	7	0.02	0.04	0.17	0.15	.008	S
	15	8	0.10	0.12	0.14	0.10	.332	NS

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

^bGroup 5: Acid etching + direct illumination; Group 6: Acid etching + transillumination; Group 7: Self etching primer + direct illumination; Group 8: Self etching primer + transillumination