The Influence of Dentine on the pH of Calcium Hydroxide, Chlorhexidine Gel, and Experimental Bioactive Glass-Based Root Canal Medicament

Table 1

Mean pH values of the medications for the six time periods of the study.

Medication	Immediate	24 hours	Days				value
			7	14	21	30
CHX	6.72^a	5.52^a	6.78^a	6.36^a	5.7^a	5.90^a	0.3530
CHX + D	6.78^a	5.40^a	6.54^a	6.56^a	6.44^a	6.12^a
Ca(OH)2 + CHX	9.02^b	7.66^c	7.44^b	7.24^b	7.34^b	6.88^b	0.0550
Ca(OH)2 + CHX + D	9.06^b	8.22^c	7.40^b	7.48^b	7.60^b	7.58^b
Ca(OH)2 + PEG	10.24^c	8.40^c	7.38^b	7.42^b	7.52^b	7.68^b	0.5530
Ca(OH)2 + PEG + D	11.00^c	8.14^c	7.40^b	7.48^b	7.50^b	7.66^b
BNPG + distilled water	7.42^a	7.22^b	7.56^b	7.30^b	7.90^b	7.30^b	0.9202
BNPG + distilled water + D	8.32^a	7.12^b	7.22^b	7.20^b	7.20^b	7.50^b

Different superscript letters in rows indicate significant differences between time periods ().
CHX: chlorhexidine gel; Ca(OH)₂: calcium hydroxide; PEG: propylene glycol 600; BNPG: bioactive niobium phosphate glass; and D: dentine.