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

Table 2

Descriptive and inferential statistics of pilot shear bond strengths (SBSs) of bracket debonding at 24 h water storage.

SEP group	N	Min	Max	Mean SBS (MPa)	SD	Statistics: ANOVA	Statistics: Tukey HSD post hoc multiple comparisons
Control	10	10.7	24.1	18.1	4.7	F = 22.887; df = 3	A
5nHAp-SEP	10	8.3	16.9	12.6	2.6		B
7nHAp-SEP	10	9.8	16.3	12.6	2.3		B
9nHAp-SEP	10	3.5	9.5	6.7	1.9		C

The control group yielded significantly higher mean SBS values than the experimental nHAp formulations. () Dissimilar letters indicate significant differences among groups at the 0.001 level.