Tooth discoloration effects of calcium silicate based barrier materials used in revascularization and treatment with internal bleaching
Abstract
Background/purpose
Usage
of barrier materials is an important step in revascularization
procedure. One of the undesired properties of these barrier materials is
to cause coronal tooth discoloration. The aim of this in vitro
study was to evaluate the tooth discoloration induced by ProRoot MTA
(PMTA), Biodentine, and MM-MTA, as well as the efficacy of internal
bleaching on this discoloration.
Materials and methods
Forty-two
maxillary incisor teeth were prepared. Triple antibiotic paste (TAP)
was placed in the root canals and incubated for 3 weeks. After removing
the TAP, blood embedded spongostans were inserted into the root canals,
and PMTA, Biodentine, or MM-MTA was placed over them. The teeth were
incubated for 4 weeks at 37 °C; then, the internal bleaching agent was
sealed for one week. The tooth color was measured throughout the study
and the color change values (ΔE) of each specimen were calculated, and
the data was statistically analyzed using the one-way ANOVA and
Tamhane's T2 tests.
Results
The TAP significantly decreased the luminosity of the teeth (p < 0.05);
however, no significant differences were observed between the tooth
discolorations induced by the PMTA, Biodentine, and MM-MTA (p > 0.05). The teeth in the Biodentine group were more whitened than those of the PMTA and MM-MTA groups (p < 0.05).
Conclusion
Although
the PMTA, Biodentine, and MM-MTA caused similar color alterations in
the teeth, more bleaching was observed on those teeth discolored using
TAP + blood + Biodentine.
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