da Silva L A, Leonardo M R, da Silva R S, Assed S, Guimarães L F
Department of Pediatric Dentistry, Ribeirão Preto Dental School, USP, Brazil.
Int Endod J. 1997 May;30(3):205-9. doi: 10.1046/j.1365-2591.1997.00079.x.
The 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.
