Comparative SEM study of the marginal adaptation

Abstract

Comparative SEM study of the marginal adaptation of white and grey MTA and Portland cement.

Department of Endodontics, Dental ReSearch Center of Objectives:The aim of the present study was to compare the marginal adaptation of three root-end filling materials (white mineral trioxide aggregate (MTA), grey MTA and Portland cement)

Methods:Seventy-five single-rooted extracted human teeth were used. The canals were instrumented and filled with gutta-percha. Following root-end resection and cavity preparation, root-end cavities were filled with white MTA, grey MTA or Portland cement.Under scanning electron microscopy, the gaps between the material and dentinal wall were measured. The data were analysed using Kruskal-Wallis test.

Results: The mean of the gap in grey MTA, white MTA and Portland cement was 211.6, 349 and 326.3 microm, respectively.

Conclusion: The results indicate that the gap between grey MTA and the dentinal wall is less than other materials, but there was no significant difference between the materials tested in this study (P > 0.05).

Acknowledgement

This work was supported in part by the Dental Research Centre and the Vice Chancellor for Research of MashadUniversity of Medical Sciences, Mashad, Iran.Sciences, Mashad, Iran.