Bezerra Da Silva, L. A.Leonardo, M. R. [UNESP]Da Silva, R. S.Assed, S.Guimarães, L. F L2014-05-272014-05-271997-12-01International Endodontic Journal, v. 30, n. 3, p. 205-209, 1997.0143-2885http://hdl.handle.net/11449/65321The calcium hydroxide ionization of four root canal sealers (Sealapex, CRCS, Sealer 26, and Apexit) was studied by measuring conductivity and pH and by conducting atomic absorption spectrophotometry. Samples 6 mm in diameter and 15 mm long were prepared from these sealers. After setting and 48 h storage in a desiccator, five samples of each material were placed in 50 mL distilled water and analysed after 0,1,2,4, 6 and 24 h and 5, 15 and 30 days. The results showed that Sealapex was the root canal sealer showing the highest pH, ionic calcium and total calcium values (P<0.05) throughout the experimental period, followed by CRCS, Apexit and Sealer 26.205-209engCalcium hydroxideRoot canal sealersApexitbismuthCalcibiotic Root Canal Sealercalciumcalcium hydroxideroot canal filling materialsalicylic acid derivativesealapexSealer 26zinc oxideatomic absorption spectrometrychemistrycomparative studyion exchangepHBismuthCalciumCalcium HydroxideHydrogen-Ion ConcentrationIon ExchangeRoot Canal Filling MaterialsSalicylatesSpectrophotometry, AtomicZinc OxideArtigoAcesso restrito2-s2.0-0031129895