a-TCP cements prepared by syringe-foaming: Influence of N^sub a^2HPO^sub 4^ and surfactant concentration
The lack of intrinsic open porosity in calcium phosphate cements slows down the resorption rate and bone ingrowth when implanted In Vivo. In this study, macroporous structures were obtained by mixing a-TCP cement with a foamed liquid phase containing different concentrations of sodium hydrogen phosp...
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| Veröffentlicht in: | Materials Science & Engineering. C, Biomimetic Materials, Sensors and Systems Biomimetic Materials, Sensors and Systems, 2017-12, Vol.81, p.148 |
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| creator | Vásquez, AF Domínguez, S dos Santos, LA Loureiro |
| description | The lack of intrinsic open porosity in calcium phosphate cements slows down the resorption rate and bone ingrowth when implanted In Vivo. In this study, macroporous structures were obtained by mixing a-TCP cement with a foamed liquid phase containing different concentrations of sodium hydrogen phosphate and a nonionic surfactant. The cement paste was prepared by hand mixing in a novel system of two syringes connected by a tube. Two different liquid to powder (L/P) ratios were used to prepare the cement paste. The cement samples showed open macropores with diameters > 100 ...m. The specimens prepared with lower L/P ratio showed smaller porosity, macroporosity and pore size distribution. The cohesion of the cement paste in liquid solutions was assessed by adding 2 wt% sodium alginate to the liquid phase. This study suggests that the final macrostructure of the foamed cements can be controlled by varying the phosphate and surfactant concentrations in the liquid phase and the L/P ratio. |
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In this study, macroporous structures were obtained by mixing a-TCP cement with a foamed liquid phase containing different concentrations of sodium hydrogen phosphate and a nonionic surfactant. The cement paste was prepared by hand mixing in a novel system of two syringes connected by a tube. Two different liquid to powder (L/P) ratios were used to prepare the cement paste. The cement samples showed open macropores with diameters > 100 ...m. The specimens prepared with lower L/P ratio showed smaller porosity, macroporosity and pore size distribution. The cohesion of the cement paste in liquid solutions was assessed by adding 2 wt% sodium alginate to the liquid phase. This study suggests that the final macrostructure of the foamed cements can be controlled by varying the phosphate and surfactant concentrations in the liquid phase and the L/P ratio.</description><identifier>ISSN: 0928-4931</identifier><identifier>EISSN: 1873-0191</identifier><language>eng</language><publisher>Lausanne: Elsevier BV</publisher><subject>Alginic acid ; Bone resorption ; Calcium ; Calcium phosphates ; Cement ; Cements ; Foaming ; In vivo methods and tests ; Macroporosity ; Macrostructure ; Materials science ; Phosphates ; Pore size ; Pore size distribution ; Porosity ; Powder ; Size distribution ; Sodium ; Sodium alginate ; Sodium hydrogen phosphate ; Surfactants ; Surgical implants ; Syringes ; Transplants & implants</subject><ispartof>Materials Science & Engineering. 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| identifier | ISSN: 0928-4931 |
| ispartof | Materials Science & Engineering. C, Biomimetic Materials, Sensors and Systems, 2017-12, Vol.81, p.148 |
| issn | 0928-4931 1873-0191 |
| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Alginic acid Bone resorption Calcium Calcium phosphates Cement Cements Foaming In vivo methods and tests Macroporosity Macrostructure Materials science Phosphates Pore size Pore size distribution Porosity Powder Size distribution Sodium Sodium alginate Sodium hydrogen phosphate Surfactants Surgical implants Syringes Transplants & implants |
| title | a-TCP cements prepared by syringe-foaming: Influence of N^sub a^2HPO^sub 4^ and surfactant concentration |
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