The effect of different surface treatments of demineralised enamel on microleakage under metal orthodontic brackets

Progress in Orthodontics

Table 1 Descriptive statistics and comparison of microleakage values between the study groups for occlusal and gingival sides

Interface	Group	Occlusal				Gingival				Statistical significance
		Descriptive values (mm)			Pairwise comparisons	Descriptive values (mm)			Pairwise comparisons
		Percentiles				Percentiles
		25th	50th (median)	75th		25th	50th (median)	75th
Enamel-adhesive	1 (Control)	0	0	0.39	a	0	0	0.84	a	P = 0.479
	2 (Demineralised/control)	0	0	1.39	a	0	0	1.99	a	P = 0.358
	3 (Demineralised/NaOCl)	0	0	1.27	a	0	0	1.34	a	P = 0.749
	4 (Demineralised/SEP)	0	0.31	0.95	a	0	0.72	1.24	a	P = 0.409
	5 (Demineralised/NaF)	0	0	0		0	0	0		P = 0.317
	Statistical significance	P = 0.007				P < 0.001
Adhesive-bracket	1 (Control)	0	0	0		0	0	0		P = 0.505
	2 (Demineralised/control)	0	0	0	b	0	0	0	b	P = 0.718
	3 (Demineralised/NaOCl)	0	0	0		0	0	0	b	P = 0.239
	4 (Demineralised/SEP)	0	0	0.44		0	0	0.87		P = 0.184
	5 (Demineralised/NaF)	0	0	0	b	0	0	0	b	P = 0.336
	Statistical significance	P = 0.009				P < 0.001

^a statistically significant difference with group 5; ^b statistically significant difference with group 4.