Hydroxyl Ion Diffusion through Radicular Dentine When Calcium Hydroxide Is Used under Different Conditions

Calcium hydroxide's anti-bacterial action relies on high pH. The aim here was to investigate hydroxyl ion diffusion through dentine under different conditions. Teeth were divided into control ( = 4) and four experimental groups ( = 10): Group 1-no medicament; Group 2-Calmix; Group 3-Calmix/Lede...

Full description

Saved in:
Bibliographic Details
Published in:Materials 2018-01, Vol.11 (1), p.152
Main Authors: Cai, Michael, Abbott, Paul, Castro Salgado, Jacqueline
Format: Article
Language:English
Subjects:
Antiinfectives and antibacterials
Bacteria
Diffusion layers
Endodontics
Formulations
Ion diffusion
Polyethylene glycol
Slaked lime
Smear
Teeth
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Calcium hydroxide's anti-bacterial action relies on high pH. The aim here was to investigate hydroxyl ion diffusion through dentine under different conditions. Teeth were divided into control ( = 4) and four experimental groups ( = 10): Group 1-no medicament; Group 2-Calmix; Group 3-Calmix/Ledermix; Group 4-Calasept Plus/Ledermix; Group 5-Pulpdent/smear layer. Deep (inner dentine) and shallow (outer dentine) cavities were cut into each root. pH was measured in these cavities for 12 weeks. The inner and outer dentine pH in Group 2 was significantly higher than all groups. Inner dentine pH in Group 3 was slightly higher than that in Group 4 initially but subsequently comparable. After Day 2, Group 5 had significantly lower pH than Groups 3 and 4. The outer dentine pH in Group 3 started higher than that in Groups 4 and 5, but by Day 28 the difference was insignificant. The time for the inner dentine to reach maximum pH was one week for Group 2 and four weeks for Groups 3 and 4. The time for the outer dentine to reach maximum pH was eight weeks for all experimental groups. Mixing different Ca(OH)₂ formulations with Ledermix gave similar hydroxyl ion release but pH and total diffusion was lower than Ca(OH)₂ alone. The smear layer inhibited diffusion.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma11010152