Evaluation of the Effect of Intrinsic Material Properties and Ambient Conditions on the Dimensional Stability of White Mineral Trioxide Aggregate and Portland Cement

The MTA was very susceptible to ambient conditions. The addition of bismuth oxide to MTA reduced the leaching of calcium hydroxide, increased the material solubility, and caused deterioration in material dimensional stability. Further research is necessary to establish the material porosity and its effect on the dimensional stability.