Sealing Ability and Adaptability of Nano Mineral Trioxide Aggregate as a Root-End Filling Material

Marwa Wagih; Ehab Hassanien; Mohamed Nagy

doi:10.3889/oamjms.2022.10080

Authors

Marwa Wagih Department of Endodontics, Future University in Egypt, New Cairo, Egypt
Ehab Hassanien Department of Endodontics, Galala University, Suez, Egypt https://orcid.org/0000-0002-8687-5531
Mohamed Nagy Department of Endodontics, Galala University, Suez, Egypt; Department of Endodontics, Ain Shams University, Cairo, Egypt

DOI:

https://doi.org/10.3889/oamjms.2022.10080

Keywords:

Sealing ability, Adaptability, Retrograde filling, Nano-MTA

Abstract

Aim: Comparison between Nano MTA & MTA as a root-end filling materials regarding adaptability and sealing ability.

Materials and Methods: Forty extracted human maxillary incisors with straight roots were used. After root canals preparation and obturation, the apical 3 mm of each root was resected perpendicular to the long axis of the tooth. Root end cavities were prepared to a depth of 3mm parallel to the long axis of the tooth. The teeth were randomly divided into two main equal groups of 20 samples each according to the root-end filling material used either MTA or Nano MTA. Ten samples from each group were sectioned longitudinally into two equal halves to measure the sealing ability and another ten samples from each group were sectioned transversally to obtain 1 mm thick section to measure the adaptability of both materials. All samples were photographed under the SEM at three different magnifications (×1000). The gap thickness between the root end filling material and the retro cavity dentine walls were measured at seven selected points at the material-dentine interface in micrometers (µm).

Results: Nano MTA and MTA showed no statistically significant difference in the gap thickness between dentin-material interface in both longitudinal and transverse sections. Regarding the sealing ability, the mean value in MTA was (3.27±0.77), while the mean in Nano-MTA was (3.15±0.71). Regarding the adaptability, the mean value in MTA was (2.46±0.60), while the mean in Nano-MTA was (2.05±0.712). Both materials showed good sealing ability and good adaptation to the dentinal wall.

Conclusion: Nano MTA revealed good sealing ability and adaptability comparable to MTA when used as a retrograde filling material.

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