Evaluation of pH levels and calcium ion release in various calcium hydroxide endodontic dressings.
OBJECTIVE
The purpose of this study was to evaluate Ca(2+) release and pH of 3 calcium hydroxide-based products used routinely as intracanal dressings, as well as the new gutta-percha points with calcium hydroxide.


METHODS
The pH and Ca(2+) release were assessed using Calen with camphorated paramonochlorophenol, saline calcium hydroxide paste, LC paste (Lopes and Costa paste-calcium hydroxide with olive oil), and calcium hydroxide containing gutta-percha points. The materials were inserted in polyethylene tubes and immersed in deionized water. The pH variation and Ca(2+) release were monitored periodically for 4 weeks.


RESULTS
After 72 hours, materials 1 and 2 raise the pH from 9.6 and 8.2 to 11.4 and 11.3, respectively, while a small change was observed for materials 3 and 4. The calcium concentration released from materials 1, 2, 3, and 4 after 72 hours was 6.54, 4.98, 1.31, and 1.74 mg/dL, respectively.


CONCLUSIONS
Calen plus camphorated paramonochlorophenol and saline calcium hydroxide paste exhibited the highest calcium release and pH levels.
de Andrade Ferreira
Flaviana Bombarda
FB
Faculty of Dentistry of Bauru, University of Sao Paulo, Brazil.
Silva E Souza
Patrícia de Almeida Rodrigues
Pde A
do Vale
Mônica Sampaio
MS
de Moraes
Ivaldo Gomes
IG
Granjeiro
José Mauro
JM
D000704:Analysis of Variance; D000891:Anti-Infective Agents, Local / Q000737:chemistry; D002118:Calcium / Q000737:chemistry*; D002126:Calcium Hydroxide / Q000737:chemistry*; D002164:Camphor / Q000737:chemistry; D002733:Chlorophenols / Q000737:chemistry; D004338:Drug Combinations; D006171:Gutta-Percha / Q000737:chemistry; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008422:Materials Testing; D000069463:Olive Oil; D010938:Plant Oils / Q000737:chemistry; D012387:Root Canal Filling Materials / Q000737:chemistry; D012388:Root Canal Irrigants / Q000737:chemistry*; D012965:Sodium Chloride / Q000737:chemistry; D013997:Time Factors
D000891:Anti-Infective Agents, Local; D002733:Chlorophenols; D004338:Drug Combinations; D000069463:Olive Oil; D010938:Plant Oils; D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; C420643:calen; D012965:Sodium Chloride; D002164:Camphor; C029804:camphorated parachlorophenol; D006171:Gutta-Percha; D002126:Calcium Hydroxide; D002118:Calcium