1
|
Continuous microwave assisted flow synthesis and characterization of calcium deficient hydroxyapatite nanorods. ADV POWDER TECHNOL 2018. [DOI: 10.1016/j.apt.2018.03.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|
2
|
Novel continuous flow synthesis, characterization and antibacterial studies of nanoscale zinc substituted hydroxyapatite bioceramics. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.07.041] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
3
|
Arepalli SK, Tripathi H, Vyas VK, Jain S, Suman SK, Pyare R, Singh S. Influence of barium substitution on bioactivity, thermal and physico-mechanical properties of bioactive glass. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 49:549-559. [DOI: 10.1016/j.msec.2015.01.049] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 12/11/2014] [Accepted: 01/09/2015] [Indexed: 01/01/2023]
|
4
|
Shuai C, Zhuang J, Hu H, Peng S, Liu D, Liu J. In vitro bioactivity and degradability of β-tricalcium phosphate porous scaffold fabricated via selective laser sintering. Biotechnol Appl Biochem 2013; 60:266-73. [PMID: 23600577 DOI: 10.1002/bab.1064] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Accepted: 11/11/2012] [Indexed: 01/19/2023]
Abstract
Porous scaffolds consisting of β-tricalcium phosphate (β-TCP) were successfully fabricated via selective laser sintering. The scaffolds had a controlled microstructure and totally interconnected porous structure. The microstructure and mechanical properties were studied. The bioactivity and degradability of scaffolds were evaluated through the simulated body fluid (SBF) cultivation experiment. The formation of a biologically active carbonate apatite layer on the surface after immersion in SBF was demonstrated using scanning electron microscope, energy dispersive X-ray, and Fourier transform infrared spectroscopy. Fast nucleation and growth of the carbonate apatite crystals were observed to occur all through the specimen surfaces. The phenomenon was explained in terms of the distribution and dispersion of inorganic phases in the scaffolds and the ionic activity products of the apatite in the SBF. The calculation results of weight loss and Ca/P molar ratio also suggest the good bioactivity and degradability of the scaffolds. These indicate that the β-TCP porous ceramic scaffold is a potential candidate scaffold for bone tissue engineering.
Collapse
Affiliation(s)
- Cijun Shuai
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha, People's Republic of China
| | | | | | | | | | | |
Collapse
|
5
|
Mukundan LM, Nirmal R, Vaikkath D, Nair PD. A new synthesis route to high surface area sol gel bioactive glass through alcohol washing: a preliminary study. BIOMATTER 2013; 3:24288. [PMID: 23512012 PMCID: PMC3749803 DOI: 10.4161/biom.24288] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Bioactive glass is one of the widely used bone repair material due to its unique properties like osteoconductivity, osteoinductivity and biodegradability. In this study bioactive glass is prepared by the sol gel process and stabilized by a novel method that involves a solvent instead of the conventional calcinations process. This study represents the first attempt to use this method for the stabilization of bioactive glass. The bioactive glass stabilized by this ethanol washing process was characterized for its physicochemical and biomimetic property in comparison with similar composition of calcined bioactive glass. The compositional similarity of the two stabilized glass powders was confirmed by spectroscopic and thermogravimetric analysis. Other physicochemical characterizations together with the cell culture studies with L929 fibroblast cells and bone marrow mesenchymal stem cells proved that the stabilization was achieved with the retention of its inherent bioactive potential. However an increase in the surface area of the glass powder was obtained as a result of this ethanol washing process and this add up to the success of the study. Hence the present study exhibits a promising route for high surface area bioactive glass for increasing biomimicity.
Collapse
Affiliation(s)
- Lakshmi M Mukundan
- Division of Tissue Engineering and Regeneration Technologies; Biomedical Technology Wing; Sree Chitra Tirunal Institute for Medical Sciences and Technology; Thiruvananthapuram, Kerala, India
| | - Remya Nirmal
- Division of Tissue Engineering and Regeneration Technologies; Biomedical Technology Wing; Sree Chitra Tirunal Institute for Medical Sciences and Technology; Thiruvananthapuram, Kerala, India
| | - Dhanesh Vaikkath
- Division of Tissue Engineering and Regeneration Technologies; Biomedical Technology Wing; Sree Chitra Tirunal Institute for Medical Sciences and Technology; Thiruvananthapuram, Kerala, India
| | - Prabha D Nair
- Division of Tissue Engineering and Regeneration Technologies; Biomedical Technology Wing; Sree Chitra Tirunal Institute for Medical Sciences and Technology; Thiruvananthapuram, Kerala, India
| |
Collapse
|
6
|
Alpha-TCP improves the apatite-formation ability of calcium-silicate hydraulic cement soaked in phosphate solutions. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2011. [DOI: 10.1016/j.msec.2011.05.012] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
7
|
Gandolfi MG, Taddei P, Tinti A, Prati C. Apatite-forming ability (bioactivity) of ProRoot MTA. Int Endod J 2010; 43:917-29. [DOI: 10.1111/j.1365-2591.2010.01768.x] [Citation(s) in RCA: 169] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
8
|
Seah RKH, Garland M, Loo JSC, Widjaja E. Use of Raman Microscopy and Multivariate Data Analysis to Observe the Biomimetic Growth of Carbonated Hydroxyapatite on Bioactive Glass. Anal Chem 2009; 81:1442-9. [DOI: 10.1021/ac802234t] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Regina K. H. Seah
- School of Materials Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, and Institute of Chemical and Engineering Sciences, Agency for Science, Technology and Research (ASTAR), 1 Pesek Rd, Jurong Island, Singapore 627833
| | - Marc Garland
- School of Materials Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, and Institute of Chemical and Engineering Sciences, Agency for Science, Technology and Research (ASTAR), 1 Pesek Rd, Jurong Island, Singapore 627833
| | - Joachim S. C. Loo
- School of Materials Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, and Institute of Chemical and Engineering Sciences, Agency for Science, Technology and Research (ASTAR), 1 Pesek Rd, Jurong Island, Singapore 627833
| | - Effendi Widjaja
- School of Materials Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, and Institute of Chemical and Engineering Sciences, Agency for Science, Technology and Research (ASTAR), 1 Pesek Rd, Jurong Island, Singapore 627833
| |
Collapse
|
9
|
Chaudhry AA, Goodall J, Vickers M, Cockcroft JK, Rehman I, Knowles JC, Darr JA. Synthesis and characterisation of magnesium substituted calcium phosphate bioceramic nanoparticles made via continuous hydrothermal flow synthesis. ACTA ACUST UNITED AC 2008. [DOI: 10.1039/b807920j] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
10
|
Wiria FE, Leong KF, Chua CK, Liu Y. Poly-epsilon-caprolactone/hydroxyapatite for tissue engineering scaffold fabrication via selective laser sintering. Acta Biomater 2007; 3:1-12. [PMID: 17055789 DOI: 10.1016/j.actbio.2006.07.008] [Citation(s) in RCA: 181] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2006] [Revised: 06/18/2006] [Accepted: 07/26/2006] [Indexed: 11/24/2022]
Abstract
Rapid prototyping (RP) techniques are becoming more popular for fabricating tissue engineering (TE) scaffolds owing to their advantages over conventional methods, such as the ability to fabricate scaffolds with predetermined interconnected networks without the use of organic solvents. A versatile RP technique, selective laser sintering (SLS), offers good user control of scaffold microstructure by adjusting the process parameters. This research focuses on a the use of biocomposite material, consisting of poly-epsilon-caprolactone (PCL) and hydroxyapatite (HA), to fabricate TE scaffolds using SLS. Biocomposite blends with different percentage weights of HA were physically blended and sintered to assess their suitability for fabrication via SLS. Optimal sintering conditions for the powders were achieved by varying parameters such as laser power and scan speed. Studies of the sintered specimen morphology were performed by scanning electron microscopy. Thermogravimetric analysis confirmed the homogeneity of the biocomposite blend. Simulated body fluid (SBF) samples show the formation of hydroxy carbonate apatite, as a result of soaking HA in a SBF environment. Cell culture experiment showed that Saos-2 cells were able to live and replicate on the fabricated scaffolds. The results show the favorable potential of PCL/HA biocomposite as TE scaffolds that are fabricated via SLS.
Collapse
Affiliation(s)
- F E Wiria
- Rapid Prototyping Research Laboratory, School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
| | | | | | | |
Collapse
|
11
|
Cerruti M, Bianchi CL, Bonino F, Damin A, Perardi A, Morterra C. Surface Modifications of Bioglass Immersed in TRIS-Buffered Solution. A Multitechnical Spectroscopic Study. J Phys Chem B 2005; 109:14496-505. [PMID: 16852827 DOI: 10.1021/jp050705t] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Bioglass 45S5 is used in the medical field as a bone regenerative material. In fact, when immersed in body fluid, a layer of hydroxy carbonate apatite (HCA), an analogue to the mineral phase that bones are made of, is deposited on its surface. A mechanism that would explain this process has been hypothesized and includes cation leaching from the glass to the solution and formation of both a silica-rich layer and a Ca/P-rich surface layer, prior to the actual crystallization of HCA. The present paper analyzes the dissolution of 2-mum-size particles of Bioglass in TRIS-buffered solution, focusing on the modifications occurring at the surface of the particles. Results from Transmission FT-IR, Raman, and X-ray Photoelectron Spectroscopy were compared in order to obtain this information. In all cases, precise spectral band assignments were obtained by comparing Bioglass spectra, before and after reaction, with the spectra registered on some selected reference samples. The results confirm the hypothesized mechanism of Bioglass reactivity and yield new insights on the surface modifications of the samples. In particular, the following is shown: the strength of the surface H-bonding system and of water coordination decreases during the reaction; surface carbonates, initially mainly bound to Na, are substituted by an increasing amount of Ca-bound carbonates; and the final calcium phosphate layer obtained is very similar, but not identical, to carbonated hydroxyapatite.
Collapse
Affiliation(s)
- Marta Cerruti
- Department of Chemistry I.F.M. and Center of Excellence NIS, University of Turin, Consortium INSTM, Research Unit of Turin University, Via P. Giuria 7, 10125 Torino, Italy.
| | | | | | | | | | | |
Collapse
|
12
|
Cerruti M, Greenspan D, Powers K. Effect of pH and ionic strength on the reactivity of Bioglass® 45S5. Biomaterials 2005; 26:1665-74. [PMID: 15576140 DOI: 10.1016/j.biomaterials.2004.07.009] [Citation(s) in RCA: 184] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2003] [Accepted: 07/05/2004] [Indexed: 10/26/2022]
Abstract
Bioglass 45S5 is a silica-based melt-derived glass, used in medical field as a bone regenerative material because of the deposition of a layer of hydroxy carbonate apatite (HCA) on the surface of the glass when immersed in body fluid. The present paper studies the early steps of reaction of 2-microm sized particles of Bioglass, in solutions buffered with TRIS at different pH, by means of ICP-ES and FTIR spectroscopy. Only at pH 8 could a total reconstruction of the glass be observed, with the formation of both a silica and a calcium phosphate rich layers. At higher pH, selective dissolution of the glass was hindered by the immediate precipitation of a layer of calcium phosphate, whereas at lower pH a total breakdown of the glass occurred and no calcium phosphate precipitation was noted. The use of the ATR-liquid cell allowed the observation of the reaction in real time, and this showed that the process of silica formation is not separable from cation leaching from the glass, as well as the formation of the calcium phosphate rich layer.
Collapse
Affiliation(s)
- Marta Cerruti
- Department of Chemistry I.F.M., University of Turin, V.P.Giuria 7, Torino 10125, Italy.
| | | | | |
Collapse
|
13
|
Hench LL, Xynos ID, Polak JM. Bioactive glasses for in situ tissue regeneration. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2005; 15:543-62. [PMID: 15212333 DOI: 10.1163/156856204323005352] [Citation(s) in RCA: 167] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Historically the function of biomaterials has been to replace diseased or damaged tissues. Recent findings show that controlled release of the ionic dissolution products of bioactive glasses results in regeneration of tissues. The mechanism for in situ tissue regeneration involves upregulation of seven families of genes that control the osteoblast cell cycle, mitosis and differentiation. In the presence of critical concentrations of Si and Ca ions, within 48 h osteoblasts that are capable of differentiating into a mature osteocyte phenotype begin to proliferate and regenerate new bone. Osteoblasts that are not in the correct phase of the cell cycle and unable to proceed towards differentiation are switched into apoptosis by the ionic dissolution products. A controlled release of soluble Ca and Si from bioactive glass--resorbable polymer composites leads to vascularised soft tissue regeneration. Gene activation by controlled ion release provides the conceptual basis for molecular design of a third generation of biomaterials optimised for in situ tissue regeneration.
Collapse
Affiliation(s)
- Larry L Hench
- Department of Materials, Imperial College London, Prince Consort Road, London SW7 2BP, UK.
| | | | | |
Collapse
|
14
|
Krajewski A, Ravaglioli A, Tinti A, Taddei P, Mazzocchi M, Martinetti R, Fagnano C, Fini M. Comparison between the in vitro surface transformations of AP40 and RKKP bioactive glasses. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2005; 16:119-128. [PMID: 15744599 DOI: 10.1007/s10856-005-5913-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2003] [Accepted: 07/20/2004] [Indexed: 05/24/2023]
Abstract
Two bioactive silica-phosphate glasses, AP40 and RKKP, were compared in their behaviour in simulated biological environment. Their chemical composition is practically identical, except that RKKP contains small amounts of amphoteric network-former oxides Ta2O5 and La2O3 (composition in wt% for AP40: beta-Ca3(PO4)2 24.50, SiO2 44.30, CaO 18.60, Na2O 4.60, K2O 0.19, MgO 2.82, CaF2 4.99; RKKP: beta-Ca3(PO4)2 24.23, SiO2 43.82, CaO 18.40, Na2O 4.55, K2O 0.19, MgO 2.79, CaF2 4.94, Ta2O5 0.99, La2O3 0.09). Previous investigations showed a better performance in osteopenic bone for RKKP. To gain more insight into these differences in biological behaviour, the in vitro bioactivity of the glasses was studied by treatment with a continuously replenished Hanks' Balanced Salt Solution (HBSS). The glasses were examined before and after HBSS treatment for 20 and 40 days by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), X-ray Energy Dispersion (EDX), Raman and IR vibrational spectroscopies. Some slight but notable differences between the two glasses were observed after HBSS treatment. IR and EDX analyses showed that deposits formed on both glasses were composed of a calcium deficient carbonate-apatite; however, the layer formed on RKKP glass was found to be slightly more calcium deficient and thinner. EDX analysis evidenced the presence of a small percentage of F- ions only in the layers formed on the RKKP samples. The differences disclosed, although slight, can contribute to the understanding of the different biological behaviour previously observed.
Collapse
Affiliation(s)
- A Krajewski
- ISTEC-CNR, Via Granarolo 64, 48018, Faenza (Ravenna), Italy
| | | | | | | | | | | | | | | |
Collapse
|
15
|
Leonor IB, Ito A, Onuma K, Kanzaki N, Zhong ZP, Greenspan D, Reis RL. In situ study of partially crystallized Bioglass and hydroxylapatite in vitro bioactivity using atomic force microscopy. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH 2002; 62:82-8. [PMID: 12124789 DOI: 10.1002/jbm.10289] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The present work investigates, in situ, the in vitro bioactivity of partially crystallized 45S5 Bioglass (BG) as a function of immersion time in a simulated body fluid (SBF) using atomic force microscopy (AFM). The results obtained for the crystallized BG were compared to those of hydroxyapatite c- and a-faces. The calcium phosphate layer grows on the crystallized 45S5 B by multiple two-dimensional nucleation and fusion of these two-dimensional islands, which is essentially the same mode as for the hydroxyapatite c-face. The surface of the crystallized 45S5 BG was almost fully covered with a dense and compact calcium phosphate layer after 24 h. The calcium phosphate formation on the crystallized BG arises from a low surface energy of the surface layer and/or an effect of the layer to lower the resistance when the growth units of calcium phosphate incorporate into the growing island. These results indicate that the crystallized 45S5 BG is suitable to be used as a filler for polymeric matrix bioactive composites, as it maintains a high bioactivity associated with a stiffer behavior (as compared to standard BG).
Collapse
Affiliation(s)
- I B Leonor
- Department of Polymer Engineering, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal.
| | | | | | | | | | | | | |
Collapse
|