The hydration chemistry of ProRoot MTA

Li, Qiu; Coleman, Nichola J.

doi:10.4012/dmj.2014-309

Cited by 44 publications

(49 citation statements)

References 26 publications

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“…Sulfate bands at 661 cm −1 and phosphate bands at 600 cm , respectively. The calcium sulfate band at 1153 cm −1 has been shifted to 1113 cm −1 that was assigned to polymerized sulfate in ettringite (hydrated calcium aluminate sulfate) phase [31].…”

Section: Fourier Transform Infraredmentioning

confidence: 99%

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

Zeid

Alamoudi

Khafagi³

et al. 2017

Journal of Spectroscopy

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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.

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Section: Fourier Transform Infraredmentioning

confidence: 99%

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

Zeid

Alamoudi

Khafagi³

et al. 2017

Journal of Spectroscopy

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“…This suggests that iodoform does not directly participate in the hydration reactions of white Portland cement; however, the decrease in mean silicate chain length indicates that it may exert an influence on the assembly of the C-S-H gel phase. The in vitro formation of a layer of bone-like substituted hydroxyapatite (HA), Ca 10 (PO 4 ) 6 (OH) 2 , on the surface of a material placed in SBF solution provides an indication of its bioactivity (i.e. the ability of the material to bond with living bone tissue and to stimulate its regeneration) [7].…”

Section: Characterisationmentioning

confidence: 99%

“…For the past two decades, Mineral trioxide aggregate (MTA), a commercial formulation comprising 80 wt% Portland cement and 20 wt% bismuth oxide (to confer radiopacity), has been used as a root filling material in dentistry [1,2]. MTA is supplied as 1 g of powder which is manually mixed with 0.35 g of sterile water.…”

Section: Introductionmentioning

confidence: 99%

“…Up to 5% of gypsum (CaSO 4 .2H 2 O) is also ground into the anhydrous cement during production to regulate the setting of the aluminate phase. 'Tooth-colored' MTA is formulated from white Portland cement (WPC) which contains low quantities of iron and manganese that impart the grey colour to ordinary Portland cement (OPC) from which 'Gray' MTA is produced [2].…”

Section: Introductionmentioning

confidence: 99%

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The Impact of Iodoform on the Hydration, Bioactivity and Antimicrobial Properties of White Portland Cement

Coleman

2017

MATEC Web Conf.

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Abstract. Iodoform (CHI3) is a potential radiopacifying agent for use in Portland cement-based root-filling materials. During this study, the impact of 20 wt% iodoform on the hydration and setting of white Portland cement (WPC) was monitored by powder X-ray diffraction, 29 Si magic angle spinning nuclear magnetic resonance spectroscopy and Vicat apparatus. The presence of 20 wt% iodoform reduced the initial and final setting times of WPC from 150 to 121 min and 200 to 165 min, respectively. Iodoform had little impact on the products and extent of hydration after 7 days of curing; although, it did cause a reduction in the mean silicate chain length of the C-S-H gel (from 4.11 to 3.47 units). Both iodoform-blended and unblended cement pastes exhibited similar in vitro bioactivity, with the formation of crystalline hydroxyapatite on their surfaces within 1 day of exposure to simulated body fluid. An inhibition zone assay confirmed that WPC possesses intrinsic antimicrobial activity against S. aureus, P. aeruginosa and E. coli, which is significantly enhanced in the presence of iodoform. This study indicates that iodoform may be a suitable radiopacifying agent for Portland cementbased dental restoratives; although, further work is required to determine its long-term stability within the cement matrix.

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“…Mineral trioxide aggregate (MTA) is a commercial dental cement comprising a mixture of 80 wt% Portland cement and 20 wt% bismuth oxide (Bi 2 O 3 ), a radiopacifying agent, which has been used in endodontic restorations for the past two decades [1]. Bismuth oxide does not directly engage in the hydration reactions of Portland cements; however, its physical presence in the cement system is reported to retard the hydration processes, to increase the porosity of the cement matrix and to decrease mechanical stability [2,3].…”

Section: Introductionmentioning

confidence: 99%

In Vitro Bioactivity and Setting Times of White Portland Cement Combined with Different Radio Pacifying Agents

et al. 2017

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Abstract.Commercial formulations based on 80:20 mixtures of Portland cement and bismuth oxide (a radiopacifying agent) are used in dentistry as root-filling materials. This study compares the impact of two alternative radiopacifiers, barium sulphate and zirconium oxide, with that of bismuth oxide, on the setting times and bioactivity of white Portland cement. The findings indicate that bismuth oxide prolongs both the initial and final setting times of the cement, and that barium sulphate and zirconium oxide have no effect on this parameter. Hydroxyapatite (HA) formed on the surfaces of all test samples within 7 days of exposure to simulated body fluid, indicating that they possess the potential to stimulate new hard tissue formation. Fourier transform infrared spectroscopy, the traditional technique for the identification of HA, was not appropriate for the analysis of these cement systems owing to the overlap of signals from each of the radiopacifiers with the characteristic P-O bending modes of HA in the 570 -610 cm -1 region. In this respect, the P-O band at 965 cm -1 of HA in the Raman spectrum was found to be a suitable means of detection since it is discrete with respect to all signals arising from the radiopacifying agents and cement phases.

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The hydration chemistry of ProRoot MTA

Cited by 44 publications

References 26 publications

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

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

The Impact of Iodoform on the Hydration, Bioactivity and Antimicrobial Properties of White Portland Cement

In Vitro Bioactivity and Setting Times of White Portland Cement Combined with Different Radio Pacifying Agents

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