pH changes in radicular dentine associated with calcium hydroxide and corticosteroid/antibiotic pastes

Abstract

The aim was to compare hydroxyl ion diffusion through dentine following placement of calcium hydroxide and Ledermix paste. Thirty-six teeth were divided into one control (n = 6) and three experimental (n = 10) groups - (i) Pulpdent paste; (ii) Pulpdent/Ledermix pastes; (iii) Ledermix paste and (iv) Saline. pH was measured in inner and outer dentine cavities over 12 months. Inner dentine time to maximum pH (T ) was 1 week for Pulpdent and 2 weeks for Pulpdent/Ledermix. Pulpdent's outer dentine T was 4 weeks and Pulpdent/Ledermix was 10 weeks. After day 1, Pulpdent pH was higher and this continued for 12 months. Pulpdent's outer dentine pH was higher than Ledermix and controls, but not significantly different from Pulpdent/Ledermix. Pulpdent/Ledermix had significantly higher pH than controls and Ledermix from day 5 until 10 months when Pulpdent/Ledermix outer dentine pH decreased and became similar. In all groups, pH reduced after 3 months.

Effect of Antioxidant and Buffering Agent Mixture on Dentin Shear Bond Strengths of Laminate Veneer and pH Change of External Medium After Intracoronal Bleaching

“…25 Therefore, the use of H 2 O 2 as an intracoronal bleaching agent decreased extraradicular pH all groups. This study suggests that was a pH change of the external medium, in agreement with the results of Rokaya et al, 25 de Sá et al, 26 and Lou et al 27 Cai et al 28 and Mustafa et al 29 found that the pH of the dentin increases after placing calcium hydroxide Ca(OH) 2 in the root canal. de Sá al.…”

“…Cai et al 28 and Mustafa et al 29 found that the pH of the dentin increases after placing calcium hydroxide Ca(OH) 2 in the root canal. de Sá al.…”