Impact of Zr-Doped BiO Radiopacifier by Spray Pyrolysis on Mineral Trioxide Aggregate.

Mineral trioxide aggregates (MTA) have been developed as a dental root repair material for a range of endodontics procedures. They contain a small amount of bismuth oxide (BiO) as a radiopacifier to differentiate adjacent bone tissue on radiographs for endodontic surgery. However, the addition of BiO to MTA will increase porosity and lead to the deterioration of MTA's mechanical properties.