Bond Strength Survival of a Novel Calcium Phosphate-Enriched Orthodontic Self-Etching System after Various Ageing Protocols: An In Vitro Study

Table 3

Descriptive and inferential statistics of pilot adhesive remnant index (ARI) scores of bracket debonding at 24 h water storage.

SEP group	N	ARI scores				Statistics: Kruskal–Wallis	Statistics: Mann–Whitney
		0	1	2	3
Control	10	0	8 (2EC)	1 (1EC)	1	H = 22.189; df = 3	A
5nHAp-SEP	10	6 (2EC)	4 (1EC)	0	0		A, B
7nHAp-SEP	10	7	3	0	0		B
9nHAp-SEP	10	10	0	0	0		B

The control group resulted in significantly higher scores than the experimental nHAp groups, except for 5nHAp-SEP. EC, enamel crack. () Dissimilar letters indicate significant differences among groups at the 0.05 level. The significance values were adjusted by the Bonferroni correction for multiple tests.