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In vitro diffusion of hydroxyl ions through root dentine from various calcium hydroxide medicaments
Author(s) -
Sevi̇may S.,
Kalayci A.,
Yilmaz S.
Publication year - 2003
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1046/j.1365-2842.2003.01081.x
Subject(s) - distilled water , calcium hydroxide , chemistry , nuclear chemistry , smear layer , calcium , sodium hydroxide , hydroxide , significant difference , diffusion , dentistry , dentin , chromatography , inorganic chemistry , mathematics , medicine , statistics , physics , organic chemistry , thermodynamics
summary The purpose of this study was to determine diffusion of hydroxyl ions through dentine from different calcium hydroxide [Ca(OH) 2 ] medicaments. Forty‐five single‐rooted teeth were instrumented and cavities (3 mm in diameter and 1 mm in depth) were prepared on the facial surface of each root. After smear layer was removed with 17% EDTA all surfaces of roots, except cavities, were coated with nail polish. Teeth were randomly divided into four experimental groups (each 10 samples) and a control group (five samples). They were filled with: group 1, Ca(OH) 2 and distilled water mixture; group 2, TempCanal; group 3, Calasept; and group 4, Ca(OH) 2 plus point. Control group, in which nothing was applied to the canals. All samples were immersed in distilled water maintained at 37 °C. pH values were measured at 1 h, 2 h, 3 h, 24 h, 48 h, 72 h, 4 days, 5 days, 6 days, 7 days and 14 days. Ca(OH) 2 ‐distilled water mixture and TempCanal showed highest pH values at 24 h. Calasept, Ca(OH) 2 plus point and control showed highest pH values at 3 h. Time intervals after 24 h, Ca(OH) 2 ‐distilled water mixture, TempCanal and Calasept showed higher pH values than Ca(OH) 2 plus point, with a statistically significant difference ( P < 0·05). The pH value of Ca(OH) 2 plus point was lower than the values of other materials after 3 h. This study indicates that non‐setting Ca(OH) 2 based materials have an effective release of hydroxyl ions compared with Ca(OH) 2 plus point.