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Alpha-tricalcium phosphate- and tetracalcium phosphate/dicalcium phosphate-based dual setting

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Alpha-tricalcium phosphate- and tetracalcium phosphate/dicalcium phosphate-based dual setting

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Título Alpha-tricalcium phosphate- and tetracalcium phosphate/dicalcium phosphate-based dual setting
Autor Rigo, Eliana Cristina da Silva
Santos, Luis Alberto dos
Vercik, Luci Cristina de Oliveira
García Carrodeguas, Raúl
Boschi, Anselmo Ortega
Abstract “Dual-setting” calcium phosphate cements (DS-CPCs), characterized by a polymerization reaction that proceeds along with the conventional hydraulic setting, were prepared and studied. Acrylamide (AA), 2-hydroxyethyl methacrylate (HEMA), and N-vinyl-2-pyrrolydone (VP) in 5, 10, and 20 wt./vol.-% were added to the liquid of α- tricalcium phosphate (α-TCP) and tetracalcium phosphate/dicalcium phosphate anhydrous (TTCP/ DCPA) conventional cements. N,N’-methylenebisacrylamide was used as cross linking agent. N,N,N´,N´-tetramethylethylendiamine in the liquid, and ammonium persulfate in the powder, were employed as polymerization catalyst and initiator, respectively. Diametral tensile strength (DTS), setting time, phase composition, conversion rate, and microstructure of the DS-CPC were compared with those of non-added cements. The DTS increased 22 % for α-TCP and 85 % for TTCP/DCPA DS-CPCs by adding 20 wt./vol.-% AA. The HEMA and VP had no positive effect on DTS. The extent of the hydraulic setting reaction for α-TCP DS-CPC was only slightly decreased by the addition of 20 wt./vol.-% of AA to the mixing liquid.
Contido em Latin american applied research = Pesquisa aplicada latinoamericana = Investigación aplicada latinoamericana. Bahía Blanca, AG. vol. 37, no. 4 (oct./dic. 2007), p. 267-274
Assunto Biomateriais
Cimento de fosfato tricálcico
Hidroxiapatita
[en] Calcium phosphate cement
[en] Dualsetting
[en] Hydroxyapatite
[en] Tetracalcium phosphate
[en] α-tricalcium phosphate
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/80104
Arquivos Descrição Formato
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