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- Title
A laboratory study of the effect of calcium hydroxide mixed with iodine or electrophoretically activated copper on bacterial viability in dentinal tubules.
- Authors
Fuss, Z.; Mizrahi, A.; Lin, S.; Cherniak, O.; Weiss, E. I.
- Abstract
Abstract Fuss Z, Mizrahi A, Lin S, Cherniak O, Weiss EI. A laboratory study of the effect of calcium hydroxide mixed with iodine or electrophoretically activated copper on bacterial viability in dentinal tubules. International Endodontic Journal , 35 , 522–526, 2002 Aim The aim of this laboratory study was to evaluate the ability of calcium hydroxide (CH), CH/iodine–potassium iodide (IKI) and electrophoretically activated copper to kill bacteria in dentinal tubules. Methodology In an in vitro model of dentinal tubule infection, 42 cylindrical root specimens, prepared from freshly extracted bovine teeth were used. After removal of the smear layer, intracanal dentinal tubules were infected with Enterococcus faecalis for 3 weeks. CH alone or preparations of CH with copper or IKI were placed in the root canal for 1 week. In specimens containing copper/CH, an electrophoretic current (5 mA/5 min) was applied using two electrodes following placement of the medicament in the canal. Powder dentine samples obtained from the canal wall using ISO sizes: 025, 027, 029, 031 and 033 burs were examined for the presence of viable bacteria by inoculating agar plates and counting colony forming units (cfu). Results A significant difference was found between the experimental groups and the positive control group. CH and CH/IKI significantly (P < 0.001) reduced bacterial viability in dentinal tubules to a depth of 200 µm. Specimens with CH/IKI had significantly fewer viable bacteria than CH alone in tubules between the depths of 200–500 µm. Treatment with CH/copper and electrophoresis was most effective; specimens showed no viable bacteria in dentinal tubules to a depth of 500 µm from the root-canal space. Conclusions IKI or electrophoretically activated copper additives can significantly improve the antibacterial properties of CH in dentinal tubules.
- Subjects
ROOT canal treatment; ENDODONTICS
- Publication
International Endodontic Journal, 2002, Vol 35, Issue 6, p522
- ISSN
0143-2885
- Publication type
Article
- DOI
10.1046/j.1365-2591.2002.00517.x