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. 2016 Winter;11(1):23-8.
doi: 10.7508/iej.2016.01.005. Epub 2015 Dec 24.

Coronal Discoloration Induced by Calcium-Enriched Mixture, Mineral Trioxide Aggregate and Calcium Hydroxide: A Spectrophotometric Analysis

Behnaz Esmaeili  1 , Homayoun Alaghehmand  1 , Tavoos Kordafshari  2 , Ghazaleh Daryakenari  1 , Maryam Ehsani  3 , Ali Bijani  4
Affiliations

Coronal Discoloration Induced by Calcium-Enriched Mixture, Mineral Trioxide Aggregate and Calcium Hydroxide: A Spectrophotometric Analysis

Behnaz Esmaeili et al. Iran Endod J. 2016 Winter.

Abstract

Introduction: The aim of this study was to compare the discoloration potential of calcium-enriched mixture (CEM) cement, white mineral trioxide aggregate (WMTA) and calcium hydroxide (CH), after placement in pulp chamber.

Methods and materials: Access cavities were prepared in 40 intact maxillary central incisors. Then, a 2×2 mm box was prepared on the middle third of the inner surface on the buccal wall of the access cavity. The specimens were randomly assigned into four groups; the boxes in the control group were left empty, in groups 1 to 3, the boxes were filled with CH, WMTA and CEM cement, respectively. The access cavities and the apical openings were sealed using resin modified glass ionomer (RMGI). The color measurement was performed with a spectrophotometer at the following intervals: before (T0), immediately after placement of the filling material (T1), one week (T2), 1 month (T3), 3 months (T4) and 5 months (T5) after filling of the box and finally immediately after removing the material from the boxes (T6). Color change (Δ E) values were calculated using the sample Kolmogorov-Smirnov test to determine the normal distribution of data, followed by ANOVA, repeated measured ANOVA and post-hoc Tukey's tests.

Results: All materials led to clinically perceptible crown discoloration after 1 week. The highest ΔE value belonged to WMTA group. Discoloration induced by CEM cement was not significantly different from CH or the control group (P>0.05).

Conclusion: CEM cement may be the material of choice in the esthetic region, specifically pertaining to its lower color changing potential compared to WMTA.

Keywords: Calcium-Enriched Mixture Cement; Mineral Trioxide Aggregate; Spectrophotometry; Tooth Discoloration.

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Figures

Figure 1
Figure 1
Comparing the mean ∆E values between the four groups in T2. The red line indicates the clinical unacceptable color change perceptible by the viewer
Figure 2
Figure 2
Distribution of ∆E values, in T6 compared to T0. The green line indicates the clinical unacceptable color change perceptible by the viewer
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