A New Weak Chelator in Endodontics: Effects of Different Irrigation Regimens with Etidronate on Root Dentin Microhardness

Table 4

The 𝑃 values (ANOVA) of the microhardness before (T0) and after (T1) the administration of the same treatment on different thirds.

Groups	CT × MT; CT × AT; MT × AT; P value in T0 (ANOVA)	CT × MT; CT × AT; MT × AT; P value in T1 (ANOVA)
G1: saline	0.89	0.68
G2: mixture 5% NaOCl and 18% HEBP (30 min)	0.57	0.16
G3: 2.5% NaOCl (30 min)	0.95	0.58
G4: 2.5% NaOCl (30 min) + 17% EDTA (3 min)	0.99	0.08
G5: 2.5% NaOCl (30 min) + 10% CA (3 min)	0.74	0.86
G6: 2.5% NaOCl (30 min) + 9% HEBP (5 min)	0.76	0.58
G7: 2.5% NaOCl (30 min) + 17% EDTA (3 min) + 2.5% NaOCl (3 min)	0.99	0.06
G8: 2.5% NaOCl (30 min) + 10% CA (3 min) + 2.5% NaOCl (3 min)	0.74	0.61
G9: 2.5% NaOCl (30 min) + 9% HEBP (5 min) + 2.5% NaOCl (3 min)	0.76	0.59

CT: cervical third; MT: middle third; AT: apical third.