Ion release and mechanical properties of calcium silicate and calcium hydroxide materials used for pulp capping
International Endodontic Journal
Abstract
Aim
To
compare the ion release and mechanical properties of a calcium
hydroxide (Dycal) and two calcium silicate (MTA Angelus and Biodentine)
cements.
Methodology
Calcium
and hydroxyl ion release in water from 24-h set cements were calculated
from titration with HCl (n=3). Calcium release after 7, 14, 21 and 28
days at pH 5.5 and 7.0 was measured using ICP-OES (n=6). Flexural
strength (FS) and modulus (E) were tested after 48-h storage and
compressive strength (CS) was tested after 48 h and 7 days (n=10). Ion
release and mechanical data were subjected to ANOVA/Tukey and
Kruskal-Wallis/Mann-Whitney tests, respectively (α=0.05).
Results
Titration
curves revealed that Dycal released significantly fewer ions in
solution than calcium silicates (p<0 .001="" 21="" 24="" 5.5="" 7.0="" after="" and="" angelus="" at="" biodentine="" by="" calcium="" cements="" compressive="" constant="" days="" dropped="" dycal="" flexural="" had="" higher="" ion="" it="" modulus="" more="" mta="" other="" p="" ph="" release="" released="" remained="" significantly="" strength="" superior="" than="" the="" while="">
Conclusions
Immediate
calcium and hydroxyl ion release in solution was significantly lower
for Dycal. In general, all materials released constant calcium levels
over 28 days, but release from Dycal was significantly lower than
Biodentine and MTA Angelus depending on pH conditions. Biodentine had
substantially higher strength and modulus than MTA Angelus and Dycal,
both of which demonstrated low stress bearing capabilities.
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