RESEARCH ARTICLE


A Comparative Study of Surface Hardness between Two Bioceramic Materials in an Experimental Apexification Model under Wet and Dry Conditions



Maria Priya Paul1, Swathi Amin1, Arun Mayya1, *, Rajaram Naik1, Shreemathi S. Mayya2
1 Department of Conservative Dentistry and Endodontics, AJ Institute of Dental Sciences, Kuntikana, Mangalore
2 Department of Data Science, Prasanna School of Public Health, Manipal Academy of Higher Education, Manipal, India


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Creative Commons License
© 2020 Paul et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Conservative Dentistry and Endodontics, AJ Institute of Dental Sciences, Kuntikana, Mangalore; Tel: 9742727324; E-mail: mayya.arun@gmail.com


Abstract

Background:

The placement of a wet cotton pellet against Mineral Trioxide Aggregate (MTA) is often recommended to ensure the completion of its setting reaction.

Objective:

This study aimed to evaluate the setting behaviour of MTA Angelus and NeoMTA by comparing their hardness after placing them in dry and moist conditions.

Methodology:

A simulated open apex was created on 40 polyvinyl tubes. The apical 4 mm of the tubes was filled with the two materials, NeoMTA Plus (Avalon Biomed Inc. Bradenton, FL, USA) and MTA Angelus (Angelus, Londrina, PR, Brazil) (n=20 per group). Both groups were subdivided into two subgroups based on the dry and wet conditions (n=10 per group). A wet cotton pellet was placed above the two materials in the wet group, and the coronal segment was sealed using Type II Glass ionomer cement (GC corporation Tokyo, Japan). Gutta-percha was placed against the test materials in the dry group with the coronal segment sealed with amalgam. Samples were placed in an oasis soaked in phosphate-buffered saline for seven days in 100% humidity and at 37°C. Microhardness was measured independently at 4 and 2 mm from the apex. Hardness was compared between materials and conditions, applying analysis of variance (a = .05).

Results:

The presence of dry or wet conditions had no significant effect on material hardness. MTA Angelus showed significantly higher hardness values compared with NeoMTA Plus.

Conclusion:

The moisture of the periapical environment can compensate for the absence of a wet cotton pellet and is adequate for the setting of the materials.

Keywords: Apexification, Microhardness, Mineral trioxide aggregate, Hardness, Analysis of variance, Wet cotton pellet.