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Journal of Spectroscopy
Volume 2017, Article ID 8736428, 9 pages
Research Article

Chemistry and Bioactivity of NeoMTA Plus™ versus MTA Angelus® Root Repair Materials

1Endodontic Department, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
2Endodontic Department, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt
3Department of Pediatric Dentistry, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
4Spectroscopy Department, Physics Division, National Research Center, Giza, Egypt
5Department of Operative Dentistry, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
6Biomaterials Division, Faculty of Oral and Dental Medicine, Tanta University, Tanta, Egypt
7Biomaterials and Tissue Engineering Division, UCL Eastman Dental Institute, 256 Gray’s Inn Road, London WC1X 8LD, UK

Correspondence should be addressed to Sawsan T. Abu Zeid; moc.liamtoh@55diezubanaswas

Received 11 February 2017; Revised 13 April 2017; Accepted 20 June 2017; Published 8 October 2017

Academic Editor: Eugen Culea

Copyright © 2017 Sawsan T. Abu Zeid et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objectives. To analyse the chemistry and bioactivity of NeoMTA Plus in comparison with the conventional root repair materials. Method and Materials. Unhydrated and hydrated (initial and final sets) materials were analysed by Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD). For bioactivity study, small holes of dentin discs were filled with either materials, immersed in PBS for 15 days, and analysed with FTIR and scanning electron microscope with energy dispersive X-ray (SEM/EDX). The calculation of crystallinity and carbonate/phosphate (CO3/PO4) ratio of surface precipitates (from FTIR) and calcium/phosphate (Ca/P) ratio (from EDX) was statistically analysed using t-test or ANOVA, respectively, at 0.05 significance. Results. Both materials are tricalcium silicate-based that finally react to be calcium silicate hydrate. NeoMTA Plus has relatively high aluminium and sulfur content, with tantalum oxide as an opacifier instead of zirconium oxide in MTA Angelus. NeoMTA Plus showed better apatite formation, higher crystallinity and Ca/P but lower CO3/PO4 ratio than MTA Angelus. SEM showed globular structure with a small particle size in NeoMTA Plus while spherical structure with large particle size in MTA Angelus. Conclusion. Due to fast setting, higher crystallinity, and better bioactivity of NeoMTA Plus, it can be used as a pulp and root repair material.