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

Abstract

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 (CO 3 /PO 4 ) 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 CO 3 /PO 4 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.

Mineralogical and Microstructural Characteristics of Two Dental Pulp Capping Materials

“…The results of FT-IR analysis for TheraCal presented similar bands for alite (Ca 3 SiO 5 ), and apatite (HA-C 10 (PO 4 ) 6 (OH) 2 ) [31], CO 3 2− , SiO 4 4− [32], CSH [33], and calcium carbonate [34], which is similar to literature data, and, after the setting reaction, bands for CSH could be identified. By immersion in SBF, it was observed that characteristic bands of the phosphate groups increased, due to mineralization of the hardened material surface.…”

“…FT-IR analysis performed on the anhydrous BIO MTA+ powder showed bands for CO 3 2− and alite, which is similar to those obtained by Abu Zeid al. [34] and Gandolfi et al [32]. By hydration at 37 °C, R.H. = 100%, calcium silicates were converted into calcium silicates hydrates, with their presence being demonstrated by scanning electron microscopy images through the form of needle-like/foils [35] and FT-IR spectra [32].…”

Morphological and chemical analysis of surface interaction of irrigant‐endosequence root repair material

“…Considering the BC paste, if material immersed in NaOCl, the spectra showed dipped OH and CO bands at 2,361 and 2,331 cm −1 respectively (Su et al, 2010). While material immersed in CHX, spectra showed the development of triple NH bands at 1,650–1,550 cm −1 and CN band at 1,249 and 1,061 cm −1 (Lohar et al, 2016; Zounon, Koriko, Kodom, Tchegueni, & Tchangbedji, 2019) and evidence of doublet phosphate bands related to apatite formation at 603 and 580 cm −1 (Abu Zeid et al, 2017).…”

“…Mineral/matrix FTIR and carbonate/phosphate FTIR ratios were calculated (Turunen et al, 2011). Deconvolution of infrared spectra was performed at 700–500 cm −1 to identify doublet v 4 phosphate bands (around 600 and 560 cm −1 ), then the crystallinity index (CI) was calculated (Abu Zeid et al, 2017; Lebon et al, 2010). All the parameters were compared among groups using One‐Way analysis of variance (ANOVA) and post hoc test.…”

“…X‐ray diffraction (XRD) is the best method to determine the phase composition of the material's surface after any chemical reaction. (Abu Zeid et al, 2018; Abu Zeid, Alamoudi, Khafagi, & Abou Neel, 2017)…”