Sol–gel derived calcium silicate ceramics

Meiszterics, Anikó; Sinkó, Katalin

doi:10.1016/j.colsurfa.2007.08.021

Cited by 73 publications

(46 citation statements)

References 20 publications

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“…Protocol A was modified from the sol-gel bioglass process reported by Meiszterics and Sinkó. 13 First, 26.57 g Ca(NO 3 ) 2 ⋅4H 2 O was added to 15 mL deionized water, and, then, 8.48 mL TEOS was added to the solution. After stirring for 5 min, 65% nitric acid (400 µL) was added as a catalyst to produce the sCSC -named so400.…”

Section: Preparation Of Scscmentioning

confidence: 99%

“…11,13 Several protocols with different mixing orders of reactants and catalysts have been reported to synthesize mesoporous calcium silicate bioglass successfully, and the mole fraction of Ca content was found to significantly affect the physical properties of products. 9,11,13 However, the influences of those factors on the properties of calcium silicate cement with a Ca/Si molar ratio of $2 were rarely reported. Zhao and Chang developed a self-setting pure C 3 S as bone cement with good biocompatibility and surface bioactivity.…”

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confidence: 99%

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A novel sol-gel-derived calcium silicate cement with short setting time for application in endodontic repair of perforations

Lee¹,

Lin

Chan

et al. 2018

IJN

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Mineral trioxide aggregate (MTA) is the most frequently used repair material in endodontics, but the long setting time and reduced mechanical strength in acidic environments are major shortcomings. In this study, a novel sol-gel-derived calcium silicate cement (sCSC) was developed using an initial Ca/Si molar ratio of 3, with the most effective mixing orders of reactants and optimal HNO 3 catalyst volumes. A Fourier transform infrared spectrometer, scanning electron microscope with energy-dispersive X-ray spectroscopy, and X-ray powder diffractometer were used for material characterization. The setting time, compressive strength, and microhardness of sCSC after hydration in neutral and pH 5 environments were compared with that of MTA. Results showed that sCSC demonstrated porous microstructures with a setting time of ~30 min, and the major components of sCSC were tricalcium silicate, dicalcium silicate, and calcium oxide. The optimal formula of sCSC was sn200, which exhibited significantly higher compressive strength and microhardness than MTA, irrespective of neutral or pH 5 environments. In addition, both sn200 and MTA demonstrated good biocompatibility because cell viability was similar to that of the control. These findings suggest that sn200 merits further clinical study for potential application in endodontic repair of perforations.

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Section: Preparation Of Scscmentioning

confidence: 99%

mentioning

confidence: 99%

A novel sol-gel-derived calcium silicate cement with short setting time for application in endodontic repair of perforations

Lee¹,

Lin

Chan

et al. 2018

IJN

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“…24 The most widely used method for the preparation of wollastonite is the sol-gel method, as the synthesized particles are homogeneous and the particles were found to be in the nano-regime. 25 In the existing literature, the synthesis of single phase wollastonite at 1,400°C-1,000°C for 24 hours has been reported. 26,27 The synthesis of wollastonite below 1,000°C was not achieved to date.…”

Section: Introductionmentioning

confidence: 99%

Influence of needle-like morphology on the bioactivity of nanocrystalline wollastonite – an in vitro study

Lakshmi¹,

Swamiappan²

2015

IJN

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In the past 2 decades, wollastonite has been studied thoroughly for its application as a bone implant material due to its biocompatibility, high mechanical strength, and excellent bioactivity when compared to calcium phosphates bioceramics. Wollastonite was prepared through the low-temperature sol-gel combustion method using urea as the fuel, nitrate ions and nitric acid as the oxidizer. Calcium nitrate and tetraethyl orthosilicate were taken as the source of calcium and silica. The synthesized wollastonite were characterized by Fourier transform infrared spectroscopy for the identification of characteristic functional group and powder X-ray diffraction for the phase identification. Employing urea as a fuel resulted in needle-like morphology of the particles, which was confirmed by scanning electron microscopy and transmission electron microscopy. It was observed that the needle-like morphology enhances the mechanical properties such as elasticity and compressive strength and also increases the surface area of the material, which could help in a rapid deposition of hydroxyapatite layer. These properties of wollastonite warrant its application as a new artificial bone material in the field of hard tissue engineering.

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“…3b). This band is corresponding to Si-O-Ca bonds in wollastonite 6,7 . This result suggests that the Si-O-Ca bonds have been formed by the modification of silica gel with the Ca(OH) 2 solution.…”

Section: Formation Of Calcium Silicate Hydratesmentioning

confidence: 99%

“…Through these silanol groups, the surface of silica gel can be easily modified with either organic functional groups or inorganic cations [2][3][4] . Calcium ions have been widely used to synthesize both calcium-doped silica and calcium silicate composites [5][6][7][8][9] . Calcium-doped silica (CS) was synthesized and its functionality as a catalyst, drug carrier, and anticorrosion pigment was investigated 5,[10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

Characterization of Calcium-doped Silica Gel Prepared in an Aqueous Solution

Quang

Park²,

Kim³

et al. 2012

Resources Processing

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In this study, calcium-doped silica was prepared by modifying sodium silicate-based silica gel in an aqueous solution of Ca(OH)2. Silica gels with less than 1 mm in size with different pH values were treated in Ca(OH)2 solution at concentrations ranging from 2 to 20 g/L and aged at 25, 60, and 90°C for 40 min. The BET surface area of the silica gel decreased while its pore size increased considerably after modification in Ca(OH)2 solution. The pH of 5% calcium-doped silica in water ranged from about 8.5 to 10, depending on the pH of silica gel, the aging temperature, and the concentration of the Ca(OH)2. When the concentration of the Ca(OH)2 solution was 20%, needle-like crystals of calcium silicate hydrate formed over the surface of silica gel.

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Sol–gel derived calcium silicate ceramics

Cited by 73 publications

References 20 publications

A novel sol-gel-derived calcium silicate cement with short setting time for application in endodontic repair of perforations

A novel sol-gel-derived calcium silicate cement with short setting time for application in endodontic repair of perforations

Influence of needle-like morphology on the bioactivity of nanocrystalline wollastonite – an in vitro study

Characterization of Calcium-doped Silica Gel Prepared in an Aqueous Solution

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Sol–gel derived calcium silicate ceramics

Cited by 73 publications

References 20 publications

A novel sol-gel-derived calcium silicate cement with short setting time for application in endodontic repair of perforations

A novel sol-gel-derived calcium silicate cement with short setting time for application in endodontic repair of perforations

Influence of needle-like morphology on the bioactivity of nanocrystalline wollastonite &ndash; an in vitro study

Characterization of Calcium-doped Silica Gel Prepared in an Aqueous Solution

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Influence of needle-like morphology on the bioactivity of nanocrystalline wollastonite – an in vitro study