Bovine Tooth Discoloration Induced by Endodontic Filling Materials for Primary Teeth

Abstract EN

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 (n=15).

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 (ΔE00⁎) (p<0.0001).

The effect of the materials on the color variation (ΔE00⁎) was statistically significant (p=0.004).

Interactions between time and materials demonstrated a significant effect on the values (ΔE00⁎) (p<0.0001).

The ZOE cement showed the highest darkening effect (p=0.018).

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.