Results 181 to 190 of about 4,220 (216)

Nanostructure of Calcium Silicate Hydrates in Cements

Physical Review Letters, 2010
Calcium silicate hydrate (CSH) is the major volume phase in the matrix of Portland cement concrete. Total x-ray scattering measurements with synchrotron x rays on synthetic CSH(I) shows nanocrystalline ordering with a particle diameter of 3.5(5) nm, similar to a size-broadened 1.1 nm tobermorite crystal structure.
Skinner, L. B., Chae, S. R., Benmore, C. J., Wenk, H. R., Monteiro, P. J. M.   +4 more
openaire   +3 more sources

In vivo biocompatibility and biomineralization of calcium silicate cements

European Journal of Oral Sciences, 2018
A new mineral trioxide aggregate (MTA) material has been developed with a modified composition that requires investigations to support its clinical use. This study evaluated the biocompatibility and biomineralization of this new MTA material and compared it with that of two other MTA cements over time.
Francine Benetti, João E. Gomes‐Filho, Juliana M. de Araújo Lopes, Jéssica G. Barbosa, Rogério C. Jacinto, Luciano T. A. Cintra   +5 more
openaire   +3 more sources

Development of calcium silicate/calcium phosphate cement for bone regeneration

Biomedical Materials, 2007
A new type of composite bone cement was prepared and investigated by adding calcium silicate (CS) to calcium phosphate cement (CPC). Low-crystalline CS prepared by heat treatment at low temperature had excellent bioactivity and degradability. Adding CS to CPC did not affect the phase composition and chemical structure of CPC, and had a little effect on
Han, Guo, Jie, Wei, Yuan, Yuan, Changsheng, Liu   +3 more
openaire   +2 more sources

A hybrid zinc–calcium–silicate polyalkenoate bone cement

Biomaterials, 2003
A novel bone cement composed of sintered zinc-calcium-silicate phosphate and hybrid polyalkenoates has been developed. Synthesis and formulation of glass fillers, monomers and polymers as well as formulation of the cement were described. The effects of sintering, polymer content, glass powder/polymer liquid (P/L) ratio and comonomer on compressive ...
Dong, Xie, Dingsong, Feng, Il-Doo, Chung, Alan W, Eberhardt   +3 more
openaire   +2 more sources

Composition and density of nanoscale calcium–silicate–hydrate in cement

Nature Materials, 2007
Although Portland cement concrete is the world's most widely used manufactured material, basic questions persist regarding its internal structure and water content, and their effect on concrete behaviour. Here, for the first time without recourse to drying methods, we measure the composition and solid density of the principal binding reaction product ...
Andrew J, Allen, Jeffrey J, Thomas, Hamlin M, Jennings   +2 more
openaire   +2 more sources

Calcium Phosphate Silicate and Calcium Silicate Cements Suppressing Osteoclasts Activity Through Cytokine Regulation

Journal of Nanoscience and Nanotechnology, 2018
Calcium phosphate silicate bone cement (CPSC) can stimulate osteoblast proliferation and promote osteogenesis, but how CPSC supress osteoclast activity through cytokine regulation is not clear. In the current study, we synthesized CPSC by incorporating monocalcium phosphate (MCP) into calcium silicate cement (CSC), and analyzed the effects of CSC and ...
Wei, Yuan, Xin, He, Jingshu, Zhang, Yadong, Chen, Tianxing, Gong, Yue, Zhu   +5 more
openaire   +2 more sources

Designing Calcium Silicate Cements with On-Demand Properties for Precision Endodontics

Journal of Dental Research, 2023
Calcium silicate (C3S) cements are available in kits that do not account for patients’ specific needs or clinicians’ preferences regarding setting time, radiopacity, mechanical, and handling properties. Moreover, slight variations in powder components and liquid content affect cement’s properties and bioactivity.
A. Cahyanto, P. Rath, T.X. Teo, S.S. Tong, R. Malhotra, B.N. Cavalcanti, L.Z. Lim, K.S. Min, D. Ho, W.F. Lu, V. Rosa   +10 more
openaire   +2 more sources

Vinylphosphonic acid-modified calcium aluminate and calcium silicate cements

Journal of Materials Science, 1996
Cementitious materials in terms of calcium phosphate cements (CPC) were prepared through the acid-base reaction between vinylphosphonic acid (VPA) and calcium aluminate cement (CAC) reactants or calcium silicate cement (CSC) reactants at 25 °C. Using CAC, two factors were responsible for the development of strength in the cements: one is the formation ...
T. Sugama, R. N. Mora
openaire   +1 more source

The change in reactivity of silicate anions during the hydration of calcium silicates and cement

Cement and Concrete Research, 1973
Abstract The change in reactivity of the silicate anion complex of tricalcium silicate, β-dicalcium silicate and portland cement during hydration was studied by measuring the rate constant ( k ) of the silicomolybdic acid formation. The three anhydrous starting materials have identical k values indicating their identical monosilicate anion ...
Ferenc D. Tamás, Mária Fábry
openaire   +1 more source

Cytotoxicities and genotoxicities of cements based on calcium silicate and of dental formocresol

Mutation Research/Genetic Toxicology and Environmental Mutagenesis, 2017
Increasing interest is being paid to the toxicities of dental materials. The purpose of this study was to determine the cytotoxicities and genotoxicities of endodontic compounds to Chinese hamster ovary (CHO-K1) reproductive cells. Cultured CHO-K1 cells were treated with dental formocresol, two types of calcium hydroxide paste, and two types of mineral
Hyunjung, Ko, Youngdan, Jeong, Miri, Kim
openaire   +2 more sources