Effect of MTA particle size on periapical healing.

Authors :: Torabinejad M
Moazzami SM
Moaddel H
Hawkins J
Gustefson C
Faras H
Wright K
Shabahang S
Source :: International endodontic journal [Int Endod J] 2017 Dec; Vol. 50 Suppl 2, pp. e3-e8. Date of Electronic Publication: 2017 Feb 09.
Publication Year :: 2017
Abstract: Aim: To examine the effect of reduction in MTA particle size on dento-alveolar and osseous healing in dogs.<br />Methodology: Root canals of 24 mandibular premolars in four 2-year-old beagles were prepared and filled with gutta-percha and sealer. Two to four weeks later, during periapical surgery, the root-end cavity preparations in these teeth were filled with either grey ProRoot MTA or modified (reduced particle sizes with faster setting time) MTA. The animals were sacrificed 4 months later. Degrees of inflammation, type of inflammatory cells, fibrous connective tissue adjacent to the root-end filling materials, cementum formation over the resected roots and root-end filling materials and bone healing were examined. Data were analysed using the McNemar test.<br />Results: No significant differences in healing of periapical tissues were found when comparing ProRoot MTA to a modified MTA containing reduced particle sizes.<br />Conclusion: Reducing the particle sizes of MTA did not impact its biological properties.<br /> (© 2016 International Endodontic Journal. Published by John Wiley & Sons Ltd.)