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Chen S, Liu D, Fu L, Ni B, Chen Z, Knaus J, Sturm EV, Wang B, Haugen HJ, Yan H, Cölfen H, Li B. Formation of Amorphous Iron-Calcium Phosphate with High Stability. Adv Mater 2023; 35:e2301422. [PMID: 37232047 DOI: 10.1002/adma.202301422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 05/05/2023] [Indexed: 05/27/2023]
Abstract
Amorphous iron-calcium phosphate (Fe-ACP) plays a vital role in the mechanical properties of teeth of some rodents, which are very hard, but its formation process and synthetic route remain unknown. Here, the synthesis and characterization of an iron-bearing amorphous calcium phosphate in the presence of ammonium iron citrate (AIC) are reported. The iron is distributed homogeneously on the nanometer scale in the resulting particles. The prepared Fe-ACP particles can be highly stable in aqueous media, including water, simulated body fluid, and acetate buffer solution (pH 4). In vitro study demonstrates that these particles have good biocompatibility and osteogenic properties. Subsequently, Spark Plasma Sintering (SPS) is utilized to consolidate the initial Fe-ACP powders. The results show that the hardness of the ceramics increases with the increase of iron content, but an excess of iron leads to a rapid decline in hardness. Calcium iron phosphate ceramics with a hardness of 4 GPa can be achieved, which is higher than that of human enamel. Furthermore, the ceramics composed of iron-calcium phosphates show enhanced acid resistance. This study provides a novel route to prepare Fe-ACP, and presents the potential role of Fe-ACP in biomineralization and as starting material to fabricate acid-resistant high-performance bioceramics.
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Affiliation(s)
- Song Chen
- Orthopedic Institute, Department of Orthopaedic Surgery, The First Affiliated Hospital, School of Biology & Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou, Jiangsu, 215006, P. R. China
| | - Dachuan Liu
- Orthopedic Institute, Department of Orthopaedic Surgery, The First Affiliated Hospital, School of Biology & Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou, Jiangsu, 215006, P. R. China
| | - Le Fu
- School of Materials Science and Engineering, Central South University, Changsha, 410017, P. R. China
| | - Bing Ni
- Physical Chemistry, Department of Chemistry, University of Konstanz, Universitätsstraße 10, 78457, Konstanz, Germany
| | - Zongkun Chen
- Physical Chemistry, Department of Chemistry, University of Konstanz, Universitätsstraße 10, 78457, Konstanz, Germany
| | - Jennifer Knaus
- Physical Chemistry, Department of Chemistry, University of Konstanz, Universitätsstraße 10, 78457, Konstanz, Germany
| | - Elena V Sturm
- Physical Chemistry, Department of Chemistry, University of Konstanz, Universitätsstraße 10, 78457, Konstanz, Germany
- Section Crystallography, Department of Geo- and Environmental Sciences, Ludwigs-Maximilians-University Munich, Theresienstr. 41, 80333, Munich, Germany
| | - Bohan Wang
- School of Materials Science and Engineering, Central South University, Changsha, 410017, P. R. China
| | - Håvard Jostein Haugen
- Department of Biomaterials, Institute for Clinical Dentistry, University of Oslo, PO Box 1109 Blindern, Oslo, 0376, Norway
| | - Hongji Yan
- Department of Medical Cell Biology, Uppsala University, Uppsala, 752 36, Sweden
- AIMES - Center for the Advancement of Integrated Medical and Engineering Sciences at Karolinska Institutet and KTH Royal Institute of Technology, Stockholm, 171 77, Sweden
- Department of Neuroscience, Karolinska Institutet, Stockholm, 171 77, Sweden
| | - Helmut Cölfen
- Physical Chemistry, Department of Chemistry, University of Konstanz, Universitätsstraße 10, 78457, Konstanz, Germany
| | - Bin Li
- Orthopedic Institute, Department of Orthopaedic Surgery, The First Affiliated Hospital, School of Biology & Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou, Jiangsu, 215006, P. R. China
- Collaborative Innovation Center of Hematology, Soochow University, Suzhou, Jiangsu, 215006, P.R.China
- Department of Orthopaedic Surgery, The Affiliated Haian Hospital of Nantong University, Haian,Nantong, Jiangsu, 226600, P.R.China
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Desbord M, Soulié J, Rey C, Combes C. Tunable Behavior in Solution of Amorphous Calcium Ortho/Pyrophosphate Materials: An Acellular In Vitro Study. ACS Biomater Sci Eng 2022; 8:2363-2374. [PMID: 35533345 DOI: 10.1021/acsbiomaterials.1c01618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Amorphous calcium phosphate-based materials are of major interest in the field of bone substitution. Very recently, the low-temperature synthesis of a new family of amorphous calcium phosphate containing both orthophosphate and pyrophosphate ions in controlled proportions has been reported. Despite their interest, especially due to the biochemical role and the hydrolysis of pyrophosphate occurring in vivo, the behavior of such materials when interacting with aqueous media has never been described. Consequently, we herein report the in vitro acellular evolution of three compositions of mixed calcium ortho- and pyrophosphate amorphous materials including a different orthophosphate proportion. As a first step to assess the physicochemical reactivity of these amorphous materials, they were tested in two different media at 37 °C, acidified water and simulated body fluid solution, from 1 h up to 15 days. The results demonstrated that they were quite stable and that they progressively released part of their constitutive ions, highlighting their potential for controlled delivery of bioactive ions (calcium, orthophosphate, and pyrophosphate ions). In addition to these properties, we showed that the material with the highest ortho/(ortho + pyro) phosphate ratio started to crystallize into nanocrystalline apatite analogous to bone mineral within 2 days or 2 weeks depending on the medium. For the other material compositions, no layer of apatite was detected at their surface with SBF testing despite the favorable supersaturation indexes, crystallization being probably inhibited by pyrophosphate ions released in the medium. This varying apatite-forming ability emphasizes the key role of the ortho/(ortho + pyro) phosphate ratio of these materials in their in vitro reactivity and bioactivity, which paves the way for the development of this promising family of amorphous calcium phosphate materials with tunable physicochemical and biological properties.
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Affiliation(s)
- Maximilien Desbord
- CIRIMAT, Université de Toulouse, CNRS, Toulouse INP- ENSIACET, 4 allée Emile Monso, 31030 Toulouse cedex 4, France
| | - Jérémy Soulié
- CIRIMAT, Université de Toulouse, CNRS, Toulouse INP- ENSIACET, 4 allée Emile Monso, 31030 Toulouse cedex 4, France
| | - Christian Rey
- CIRIMAT, Université de Toulouse, CNRS, Toulouse INP- ENSIACET, 4 allée Emile Monso, 31030 Toulouse cedex 4, France
| | - Christèle Combes
- CIRIMAT, Université de Toulouse, CNRS, Toulouse INP- ENSIACET, 4 allée Emile Monso, 31030 Toulouse cedex 4, France
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WHITED BRYCEM, GOLDSTEIN AARONS, SKRTIC DRAGO, LOVE BRIANJ. Fabrication and characterization of poly(DL-lactic-co-glycolic acid)/zirconia-hybridized amorphous calcium phosphate composites. J Biomater Sci Polym Ed 2006; 17:403-18. [PMID: 16768292 PMCID: PMC2962981 DOI: 10.1163/156856206776374124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Several minerals, such as hydroxyapatite and beta-tricalcium phosphate, have been incorporated into bioresorbable polyester bone scaffolds to increase the osteoconductivity both in vitro and in vivo. More soluble forms of calcium phosphate that release calcium and phosphate ions have been postulated as factors that increase osteoblast differentiation and mineralization. Recently, a zirconia-hybridized pyrophosphate-stabilized amorphous calcium phosphate (Zr-ACP) has been synthesized allowing controlled release of calcium and phosphate ions. When incorporated into bioresorbable scaffolds, Zr-ACP has the potential to induce osteoconductivity. In this study, 80-90% (w/v) porous poly(DL-lactic-co-glycolic acid) (PLGA) scaffolds were formed by thermal phase separation from dioxane while incorporating Zr-ACP. Scanning electron microscopy revealed a highly porous structure with a pore size ranging from a few microm to about 100 microm, smaller than we had hoped for. Zr-ACP particles were evenly dispersed in the composite structure and incorporated into the pore walls. The amorphous structure of the Zr-ACP was maintained during composite fabrication, as found by X-ray diffraction. Composite scaffolds had larger compressive yield strengths and moduli compared to pure polymer scaffolds. These initial efforts demonstrate that PLGA/Zr-ACP composites can be formed in ways that ultimately serve as promising bone scaffolds in tissue engineering.
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Affiliation(s)
- BRYCE M. WHITED
- School of Biomedical Engineering and Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
| | - AARON S. GOLDSTEIN
- School of Biomedical Engineering and Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
- Department of Chemical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
| | - DRAGO SKRTIC
- American Dental Association Foundation, Paffenbarger Research Center, Gaithersburg, MD 20899, USA
| | - BRIAN J. LOVE
- School of Biomedical Engineering and Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
- Department of Materials Science and Engineering, 0286, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
- To whom correspondence should be addressed at the Department of Materials Science and Engineering. Tel.: (1-540) 231-3186. Fax: (1-540) 231-3554.,
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