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International Journal of Dentistry
Volume 2017 (2017), Article ID 7401962, 5 pages
Research Article

Bovine Tooth Discoloration Induced by Endodontic Filling Materials for Primary Teeth

Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil

Correspondence should be addressed to Fernanda Geraldo Pappen; rb.moc.oohay@neppapref

Received 5 December 2016; Accepted 19 March 2017; Published 5 April 2017

Academic Editor: Chia-Tze Kao

Copyright © 2017 Samantha Rodrigues Xavier et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objective. This study evaluated the discoloration potential of endodontic materials used in primary teeth. Material and Methods. Dentine-enamel blocks were prepared from 75 bovine teeth, assorted in five experimental groups (). The tested materials included an MTA-based material; zinc oxide and eugenol cement (ZOE); Vitapex; and calcium hydroxide thickened with zinc oxide (Calen + ZO). The color measurements were performed using a spectrophotometer at the following intervals: prior to (T0) and after placement of the filling (T1) and after 1 week (T2), 1 month (T3), 3 months (T4), 6 months (T5), and 9 months (T6). Data were submitted to ANOVA with repeated measures and Tukey’s test. Results. The time had a significant effect on the color variation () (). The effect of the materials on the color variation () was statistically significant (). Interactions between time and materials demonstrated a significant effect on the values () (). The ZOE cement showed the highest darkening effect (). Conclusion. The MTA-based material showed the smallest discoloration during the experimental time; however, it was similar to the other materials and to the control group. Zinc oxide and eugenol showed higher discoloration.