Raman and IR spectroscopic study of nano-crystalline calcium silicate hydrates of type C-S-H(I)

Gasharova, B.; Garbev, Krassimir; Bornefeld, Marc; Black, Leon; Stemmermann, Peter

doi:10.1107/s0108767306095857

Cited by 3 publications

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“…For freshly prepared specimens, Figure 8a indicates the presence of a band at 1085 cm −1 assigned to Ca silicate[ 29 ] which is of better intensity in Biodentine compared to TheraCal LC, while for TheraCal PT, this band appears rare and weak. The CaCO 3 band at 1080 cm −1 was observed in Biodentine only.…”

Section: Resultsmentioning

confidence: 99%

In vitrobioactivity of newly introduced dual-cured resin-modified calcium silicate cement

2022

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Background: This study was designed to investigate the in vitro bioactivity of a new dual cured calcium silicate cement (TheraCal PT) compared to its light cured (TheraCal LC) and chemically set (Biodentine) counterparts. Materials and Methods: The study is an in vitro original research article. Prepared cements discs were immersed in deionized water. Ca 2 + release was evaluated using inductively coupled plasma-optical emission spectrometry while pH was assessed using a pH meter after 1, 14, and 28 days. Discs for surface characterization were immersed in phosphate-buffered saline (PBS) and were examined using an environmental scanning electron microscope with energy dispersive X-ray (ESEM/EDX), immediately after setting and at 1, 14, and 28 days intervals after that. Attenuated total reflectance (ATR)/Fourier transform infrared (FTIR) and Raman spectroscopy analyses were performed after setting and after 28 days storage in PBS. Statistical analysis was performed using the two-way repeated measure analysis of variance test followed by Bonferroni test for multiple comparisons ( P < 0.05). Results: Biodentine exhibited the highest mean values for Ca 2 + release (792,639,278 ppm) and pH (10.99, 12.7, 11.54) at all time intervals. ESEM/EDX displayed a continuous layer of calcium phosphate formed by Biodentine and TheraCal LC while TheraCal PT developed scarce interrupted precipitates after immersion in PBS. ATR/FTIR and Raman spectroscopy for the formed precipitates confirmed the presence of phosphate and Ca (OH) 2 in Biodentine, TheraCal LC and TheraCal PT. Conclusion: TheraCal PT exhibited limited in vitro bioactivity which may limit its prognosis in clinical applications for vital pulp therapy. TheraCal LC is considered a potential bioactive calcium silicate cement despite its lower Ca 2 + release compared to Biodentine. Highest bioactivity was observed in Biodentine.

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Section: Resultsmentioning

confidence: 99%

In vitrobioactivity of newly introduced dual-cured resin-modified calcium silicate cement

2022

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Preliminary investigation on spent garnet as a novel supplementary cementitious material

Jamaludin,

Muthusamy,

Md Jaafar

et al. 2024

Construction and Building Materials

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Study on Synthesis of CSH Gel and Its Immobilization of Heavy Metals

Zhu,

Wang,

Liao

et al. 2024

Crystals

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Calcium silicate hydrate (CSH) gel is the most important hydration product of cement. It influences the mechanical properties of resulting materials and plays an important role in the adsorption and immobilization of heavy metal ions. Research in the structure of CSH gel and its ability for heavy metal immobilization enables the development of tailored cement-based materials, a feature that holds significant future potential. In this study, CSH gel was synthesized under different pH and Ca/Si conditions. Structural and morphological changes in CSH gel were investigated using modern technologies. The results revealed that both pH and Ca/Si ratios were important factors influencing the structure of CSH gel. During the formation of CSH, both Cr3+ and Pb2+ can be incorporated into CSH gel, and promoting the formation of calcium hydroxide Cr3+ can also replace Si4+ in the Si-O bond.

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Raman and IR spectroscopic study of nano-crystalline calcium silicate hydrates of type C-S-H(I)

Cited by 3 publications

References 0 publications

In vitrobioactivity of newly introduced dual-cured resin-modified calcium silicate cement

In vitrobioactivity of newly introduced dual-cured resin-modified calcium silicate cement

Preliminary investigation on spent garnet as a novel supplementary cementitious material

Study on Synthesis of CSH Gel and Its Immobilization of Heavy Metals

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