Formation of different calcium phosphate phases on the surface of porous Al2O3-ZrO2 nanocomposites

Author(s)

Inacio da Costa Sartori, Thauane Aparecida ^[1] ; Ferreira, Julieta Adriana ^[1] ; Osiro, Denise ^[1] ; Colnago, Luiz Alberto ^[2] ; de Jesus Agnolon Pallone, Eliria Maria ^[1]

Affiliation

^[1] Univ Sao Paulo, Dept Biosyst Engn, Av Duque Caxias Norte 225, BR-13635900 Pirassununga, SP - Brazil

^[2] Brazilian Agr Res Corp, EMBRAPA Instrumentat, Rua Quinze Novembro 1500-1501, BR-13561206 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: Journal of the European Ceramic Society; v. 38, n. 2, p. 743-751, FEB 2018.
• Web of Science Citations: 2

Abstract

Biomimetic deposition of calcium phosphates onto Al2O3-ZrO2 nanocomposites provides greater surface bioactivity, leading to the formation of biomaterials that can potentially replace and restore bone tissues. This study is aimed at evaluating the formation of different calcium phosphate phases using biomimetic coating on chemically treated and untreated surfaces of porous Al2O3-ZrO2 (5 vol%) nanocomposites at different incubation times. To this end, the porous materials fabricated by gelcasting were calcined, sintered, chemically treated or left untreated, and biomimetically coated during a period of 14-21 days. The results indicated high porosity of the nanocomposite surfaces as well as high pore interconnectivity, which favours osseointegration. Additionally, it was observed that chemical treatment may influence the amount of calcium phosphates formed on the nanocomposite surfaces as well as the minimum incubation time, favouring the formation of a particular calcium phosphate phase over the nanocomposite surface. (AU)

• FAPESP's process: 15/07319-8 - Study ultra rapid sintering and low energy consumption: flash Sintering
• Grantee: Eliria Maria de Jesus Agnolon Pallone
• Support Opportunities: Regular Research Grants