1
|
Mechanical and Biological Properties of Magnesium- and Silicon-Substituted Hydroxyapatite Scaffolds. MATERIALS 2021; 14:ma14226942. [PMID: 34832344 PMCID: PMC8619624 DOI: 10.3390/ma14226942] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/12/2021] [Accepted: 11/15/2021] [Indexed: 11/17/2022]
Abstract
Magnesium (Mg)- and silicon (Si)-substituted hydroxyapatite (HA) scaffolds were synthesized using the sponge replica method. The influence of Mg2+ and SiO44− ion substitution on the microstructural, mechanical and biological properties of HA scaffolds was evaluated. All synthesized scaffolds exhibited porosity >92%, with interconnected pores and pore sizes ranging between 200 and 800 μm. X-ray diffraction analysis showed that β-TCP was formed in the case of Mg substitution. X-ray fluorescence mapping showed a homogeneous distribution of Mg and Si ions in the respective scaffolds. Compared to the pure HA scaffold, a reduced grain size was observed in the Mg- and Si-substituted scaffolds, which greatly influenced the mechanical properties of the scaffolds. Mechanical tests revealed better performance in HA-Mg (0.44 ± 0.05 MPa), HA-Si (0.64 ± 0.02 MPa) and HA-MgSi (0.53 ± 0.01 MPa) samples compared to pure HA (0.2 ± 0.01 MPa). During biodegradability tests in Tris-HCl, slight weight loss and a substantial reduction in mechanical performances of the scaffolds were observed. Cell proliferation determined by the MTT assay using hBMSC showed that all scaffolds were biocompatible, and the HA-MgSi scaffold seemed the most effective for cell adhesion and proliferation. Furthermore, ALP activity and osteogenic marker expression analysis revealed the ability of HA-Si and HA-MgSi scaffolds to promote osteoblast differentiation.
Collapse
|
2
|
Trubitsyn MA, Hung HV, Furda LV, Hong NTT. Effect of Molar Ratios in the Crystallochemical Structure of Biomimetic Nanostructured Hydroxyapatite on the Characteristics of the Product. RUSS J INORG CHEM+ 2021. [DOI: 10.1134/s0036023621050211] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
3
|
Nitti P, Kunjalukkal Padmanabhan S, Cortazzi S, Stanca E, Siculella L, Licciulli A, Demitri C. Enhancing Bioactivity of Hydroxyapatite Scaffolds Using Fibrous Type I Collagen. Front Bioeng Biotechnol 2021; 9:631177. [PMID: 33614615 PMCID: PMC7890361 DOI: 10.3389/fbioe.2021.631177] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 01/11/2021] [Indexed: 11/20/2022] Open
Abstract
In the field of bone tissue regeneration, the development of osteoconductive and osteoinductive scaffolds is an open challenge. The purpose of this work was the design and characterization of composite structures made of hydroxyapatite scaffold impregnated with a collagen slurry in order to mimic the bone tissue structure. The effect of magnesium and silicon ions enhancing both mechanical and biological properties of partially substituted hydroxyapatite were evaluated and compared with that of pure hydroxyapatite. The use of an innovative freeze-drying approach was developed, in which composite scaffolds were immersed in cold water, frozen and then lyophilized, thereby creating an open-pore structure, an essential feature for tissue regeneration. The mechanical stability of bone scaffolds is very important in the first weeks of slow bone regeneration process. Therefore, the biodegradation behavior of 3D scaffolds was evaluated by incubating them for different periods of time in Tris-HCl buffer. The microstructure observation, the weight loss measurements and mechanical stability up to 28 days of incubation (particularly for HA-Mg_Coll scaffolds), revealed moderate weight loss and mechanical performances reduction due to collagen dissolution. At the same time, the presence of collagen helps to protect the ceramic structure until it degrades. These results, combined with MTT tests, confirm that HA-Mg_Coll scaffolds may be the suitable candidate for bone remodeling.
Collapse
Affiliation(s)
- Paola Nitti
- Biomaterials Laboratory, Department of Engineering for Innovation, University of Salento, Lecce, Italy
| | | | - Serena Cortazzi
- Biomaterials Laboratory, Department of Engineering for Innovation, University of Salento, Lecce, Italy
| | - Eleonora Stanca
- Laboratory of Biochemistry and Molecular Biology, Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy
| | - Luisa Siculella
- Laboratory of Biochemistry and Molecular Biology, Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy
| | - Antonio Licciulli
- Biomaterials Laboratory, Department of Engineering for Innovation, University of Salento, Lecce, Italy
| | - Christian Demitri
- Biomaterials Laboratory, Department of Engineering for Innovation, University of Salento, Lecce, Italy
| |
Collapse
|
4
|
Rasskazova LA, Zhuk IV, Korotchenko NM, Brichkov AS, Chen YW, Paukshtis EA, Ivanov VK, Kurzina IA, Kozik VV. Synthesis of Magnesium- and Silicon-modified Hydroxyapatites by Microwave-Assisted Method. Sci Rep 2019; 9:14836. [PMID: 31619688 PMCID: PMC6795999 DOI: 10.1038/s41598-019-50777-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 09/19/2019] [Indexed: 01/31/2023] Open
Abstract
Nanopowders of hydroxyapatite (HA), modified by magnesium (MgHA) and by silicon (SiHA) were obtained by liquid-phase microwave synthesis method. X-ray diffraction and IR spectroscopy results showed that Mg2+ and SiO44- ions were present in the synthesized products both as secondary phases and as part of the HA phase. Whitlockite was found in the magnesium-modified HA (MgHA) and larnite was found in the silicon-modified HA (SiHA); ion substitution for both materials resulted in solid solutions. In the synthesized samples of modified HA, the increase of particle size of powders was in the order HA < SiHA < MgHA, which was calculated through data specific surface area and measured pycnometric density of the powders. The Lewis acid sites (Ca2+, Mg2+, Si4+) were present using spectral probes on the surface of the samples of HA, MgHA, and SiHA, and the acidity of these sites decreased in the order SiHA > MgHA > HA. The rates of calcium phosphate layer deposition on the surface of these materials at 37 °C in the model simulated body fluid solution showed similar dependence.
Collapse
Affiliation(s)
| | - Ilya V Zhuk
- National Research Tomsk State University, 36 Lenina Avenue, Tomsk, 634050, Russia
| | | | - Anton S Brichkov
- National Research Tomsk State University, 36 Lenina Avenue, Tomsk, 634050, Russia.
| | - Yu-Wen Chen
- Department of Chemical Engineering, National Central University, Jhongli, 32001, Taiwan.
| | - Evgeniy A Paukshtis
- National Research Tomsk State University, 36 Lenina Avenue, Tomsk, 634050, Russia
| | - Vladimir K Ivanov
- National Research Tomsk State University, 36 Lenina Avenue, Tomsk, 634050, Russia
| | - Irina A Kurzina
- National Research Tomsk State University, 36 Lenina Avenue, Tomsk, 634050, Russia
| | - Vladimir V Kozik
- National Research Tomsk State University, 36 Lenina Avenue, Tomsk, 634050, Russia
| |
Collapse
|
5
|
Basu S, Basu B. Unravelling Doped Biphasic Calcium Phosphate: Synthesis to Application. ACS APPLIED BIO MATERIALS 2019; 2:5263-5297. [DOI: 10.1021/acsabm.9b00488] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Subhadip Basu
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Bikramjit Basu
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
- Center for BioSystems Science and Engineering, Indian Institute of Science, Bangalore 560012, India
| |
Collapse
|
6
|
Poorraeisi M, Afshar A. Synthesizing and comparing HA–TiO2 and HA–ZrO2 nanocomposite coatings on 316 stainless steel. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0168-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
|
7
|
Yan WC, Xie J, Wang CH. Electrical Field Guided Electrospray Deposition for Production of Gradient Particle Patterns. ACS APPLIED MATERIALS & INTERFACES 2018; 10:18499-18506. [PMID: 29758161 DOI: 10.1021/acsami.8b02914] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Our previous work demonstrated the uniform particle pattern formation on the substrates using electrical field guided electrospray deposition. In this work, we reported for the first time the fabrication of gradient particle patterns on glass slides using an additional point, line, or bar electrode based on our previous electrospray deposition configuration. We also demonstrated that the polydimethylsiloxane (PDMS) coating could result in the formation of uniform particle patterns instead of gradient particle patterns on glass slides using the same experimental setup. Meanwhile, we investigated the effect of experimental configurations on the gradient particle pattern formation by computational simulation. The simulation results are in line with experimental observations. The formation of gradient particle patterns was ascribed to the gradient of electric field and the corresponding focusing effect. Cell patterns can be formed on the particle patterns deposited on PDMS-coated glass slides. The formed particle patterns hold great promise for high-throughput screening of biomaterial-cell interactions and sensing.
Collapse
Affiliation(s)
- Wei-Cheng Yan
- Department of Chemical and Biomolecular Engineering , National University of Singapore , Singapore 117585
| | - Jingwei Xie
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program , University of Nebraska Medical Center , Omaha , Nebraska 68198 , United States
| | - Chi-Hwa Wang
- Department of Chemical and Biomolecular Engineering , National University of Singapore , Singapore 117585
| |
Collapse
|
8
|
Controlling of Electrospray Deposition for Micropatterns. MICROMACHINES 2018; 9:mi9020072. [PMID: 30393348 PMCID: PMC6187448 DOI: 10.3390/mi9020072] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Revised: 01/26/2018] [Accepted: 02/02/2018] [Indexed: 11/17/2022]
Abstract
Based on the electrohydrodynamic (EHD) theory, a novel method of near-field electrospray is proposed to fabricate micropatterns with micro/nano-scale particles. Compared with conventional electrospray technology, the deposition area can be decreased to print a regular pattern according to the moving trajectory of the substrate by shortening the distance between the nozzle and the collector to several millimeters in near-field electrospray. The controlling strategies in the near-field electrospray deposition process were investigated. The line width of printed pattern increased with the increase of applied voltage, deposition time, and flow rate of solution. However, it decreased with the increase of motion velocity of the substrate. By applying a suitable matching of electrospray parameters, the regular patterns with a line width under 500 μm were printed controllably on the substrate. Thereby, atomized particles from near-field electrospray were successfully deposited in specific patterns. Characters of '2', '7', and '9' with uniform width and steady shape were patterned. This work provides an excellent way to promote the precision integrated manufacturing of electronic system.
Collapse
|
9
|
Abinaya Sindu P, Kolanthai E, Suganthi RV, Thanigai Arul K, Manikandan E, Catalani LH, Narayana Kalkura S. Green synthesis of Si-incorporated hydroxyapatite using sodium metasilicate as silicon precursor and in vitro antibiotic release studies. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 175:163-172. [PMID: 28888169 DOI: 10.1016/j.jphotobiol.2017.08.030] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 08/17/2017] [Accepted: 08/21/2017] [Indexed: 01/23/2023]
Abstract
The aim of the current study is to synthesize nanosized silicon incorporated HAp (Si-HAP) using sodium metasilicate as the silicon source. The sol-gel derived samples were further subjected to microwave irradiation. Incorporation of Si into HAp did not alter the HAp phase, as confirmed by the X-ray diffraction analysis (XRD). Moreover, variation in the lattice parameters of the Si-incorporated HAp indicates that Si is substituted into the HAp lattice. The decrease in the intensity of the peaks attributed to hydroxyl groups, which appeared in the FTIR and Raman spectra of Si-HAp, further confirms the Si substitution in HAp lattices. The silicon incorporation enhanced the nanorods length by 70%, when compared to that of pure HAp. Microwave irradiation improved the crystallinity of Si-HAp when compared to as-synthesized Si-HAp samples. As-synthesized Si-incorporated HAp sample showed an intense blue emission under UV excitation. Microwave irradiation reduced the intensity of blue emission and exhibited red shift due to the reduction of defects in the Si-HAp crystal. The morphological change from rod to spherical and ribbon-like forms was observed with an increase in silicon content. Further, Si-HAp exhibited better bioactivity and low dissolution rate. Initially there was a burst release of amoxicillin from all the samples, subsequently it followed a sustained release. The microwave-irradiated HAp showed extended period of sustained release than that of as-synthesized HAp and Si-HAp. Similarly, the microwave-irradiated Si-incorporated samples exhibited prolonged drug release, as compared to that of the as-synthesized samples. Hence, Si-HAp is rapidly synthesized by a simple and cost effective method without inducing any additional phases, as compared to the conventional sintering process. This study provides a new insight into the rapid green synthesis of Si-HAp. Si-HAp could emerge as a promising material for the bone tissue replacement and as a drug delivery system.
Collapse
Affiliation(s)
- P Abinaya Sindu
- Centre for Biotechnology, Anna University, Chennai 600 025, Tamil Nadu, India
| | - Elayaraja Kolanthai
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, CP 26077, 05513-970 São Paulo, Brazil; Crystal Growth Centre, Anna University, Chennai 600 025, Tamil Nadu, India..
| | - R V Suganthi
- Crystal Growth Centre, Anna University, Chennai 600 025, Tamil Nadu, India
| | - K Thanigai Arul
- Crystal Growth Centre, Anna University, Chennai 600 025, Tamil Nadu, India
| | - E Manikandan
- Dept. of Physics, Thiruvalluvar University, TVUCAS Campus, Thennangur 604408, Tamil Nadu, India
| | - Luiz H Catalani
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, CP 26077, 05513-970 São Paulo, Brazil
| | - S Narayana Kalkura
- Crystal Growth Centre, Anna University, Chennai 600 025, Tamil Nadu, India..
| |
Collapse
|
10
|
Kim SM, Kang MH, Kim HE, Lim HK, Byun SH, Lee JH, Lee SM. Innovative micro-textured hydroxyapatite and poly(l-lactic)-acid polymer composite film as a flexible, corrosion resistant, biocompatible, and bioactive coating for Mg implants. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 81:97-103. [PMID: 28888023 DOI: 10.1016/j.msec.2017.07.026] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 06/15/2017] [Accepted: 07/17/2017] [Indexed: 01/31/2023]
Abstract
The utility of a novel ceramic/polymer-composite coating with a micro-textured microstructure that would significantly enhance the functions of biodegradable Mg implants is demonstrated here. To accomplish this, bioactive hydroxyapatite (HA) micro-dots can be created by immersing a Mg implant with a micro-patterned photoresist surface in an aqueous solution containing calcium and phosphate ions. The HA micro-dots can then be surrounded by a flexible poly(l-lactic)-acid (PLLA) polymer using spin coating to form a HA/PLLA micro-textured coating layer. The HA/PLLA micro-textured coating layer showed an excellent corrosion resistance when it was immersed in a simulated body fluid (SBF) solution and good biocompatibility, which was assessed by in vitro cell tests. In addition, the HA/PLLA micro-textured coating layer had high deformation ability, where no apparent changes in the coating layer were observed even after a 5% elongation, which would be unobtainable using HA and PLLA coating layers; furthermore, this allowed the mechanically-strained Mg implant with the HA/PLLA micro-textured coating layer to preserve its excellent corrosion resistance and biocompatibility in vitro.
Collapse
Affiliation(s)
- Sae-Mi Kim
- Department of Material Science and Engineering, Seoul National University, Seoul 151-742, South Korea
| | - Min-Ho Kang
- Department of Material Science and Engineering, Seoul National University, Seoul 151-742, South Korea
| | - Hyoun-Ee Kim
- Department of Material Science and Engineering, Seoul National University, Seoul 151-742, South Korea; Biomedical Implant Convergence Research Lab, Advanced Institutes of Convergence Technology, Suwon-si, Gyeonggi-do 443-270, South Korea
| | - Ho-Kyung Lim
- Department of Oral and Maxillofacial Surgery, Korea University Medical Center, Guro Hospital, Seoul 08308, South Korea
| | - Soo-Hwan Byun
- Department of Oral and Maxillofacial Surgery, Dongtan Sacred Heart Hospital, Hallym University Medical Center, Kyonggi-do 18450, South Korea
| | - Jong-Ho Lee
- Department of Oral and Maxillofacial Surgery, Clinical Trial Center, Seoul National University Dental Hospital, Seoul 110-744, South Korea
| | - Sung-Mi Lee
- Department of Material Science and Engineering, Seoul National University, Seoul 151-742, South Korea; Biomedical Implant Convergence Research Lab, Advanced Institutes of Convergence Technology, Suwon-si, Gyeonggi-do 443-270, South Korea.
| |
Collapse
|
11
|
Wijesinghe WPS, Mantilaka MMMGPG, Rajapakse RMG, Pitawala HMTGA, Premachandra TN, Herath HMTU, Rajapakse RPVJ, Wijayantha KGU. Urea-assisted synthesis of hydroxyapatite nanorods from naturally occurring impure apatite rocks for biomedical applications. RSC Adv 2017. [DOI: 10.1039/c7ra02166f] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hydroxyapatite (HA) nanoparticles are heavily used materials in biomedical applications.
Collapse
Affiliation(s)
- W. P. S. L. Wijesinghe
- Postgraduate Institute of Science
- University of Peradeniya
- Peradeniya
- Sri Lanka
- Department of Chemistry
| | - M. M. M. G. P. G. Mantilaka
- Postgraduate Institute of Science
- University of Peradeniya
- Peradeniya
- Sri Lanka
- Sri Lanka Institute of Nanotechnology
| | - R. M. G. Rajapakse
- Postgraduate Institute of Science
- University of Peradeniya
- Peradeniya
- Sri Lanka
- Department of Chemistry
| | - H. M. T. G. A. Pitawala
- Postgraduate Institute of Science
- University of Peradeniya
- Peradeniya
- Sri Lanka
- Department of Geology
| | - T. N. Premachandra
- Department of Veterinary Pathobiology
- Faculty of Veterinary Medicine
- University of Peradeniya
- Peradeniya
- Sri Lanka
| | - H. M. T. U. Herath
- Department of Medical Laboratory Science
- Faculty of Allied Health Sciences
- University of Peradeniya
- Peradeniya
- Sri Lanka
| | - R. P. V. J. Rajapakse
- Department of Veterinary Pathobiology
- Faculty of Veterinary Medicine
- University of Peradeniya
- Peradeniya
- Sri Lanka
| | | |
Collapse
|
12
|
A Very Stable High Throughput Taylor Cone-jet in Electrohydrodynamics. Sci Rep 2016; 6:38509. [PMID: 27917956 PMCID: PMC5137008 DOI: 10.1038/srep38509] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 10/25/2016] [Indexed: 12/04/2022] Open
Abstract
A stable capillary liquid jet formed by an electric field is an important physical phenomenon for formation of controllable small droplets, power generation and chemical reactions, printing and patterning, and chemical-biological investigations. In electrohydrodynamics, the well-known Taylor cone-jet has a stability margin within a certain range of the liquid flow rate (Q) and the applied voltage (V). Here, we introduce a simple mechanism to greatly extend the Taylor cone-jet stability margin and produce a very high throughput. For an ethanol cone-jet emitting from a simple nozzle, the stability margin is obtained within 1 kV for low flow rates, decaying with flow rate up to 2 ml/h. By installing a hemispherical cap above the nozzle, we demonstrate that the stability margin could increase to 5 kV for low flow rates, decaying to zero for a maximum flow rate of 65 ml/h. The governing borders of stability margins are discussed and obtained for three other liquids: methanol, 1-propanol and 1-butanol. For a gravity-directed nozzle, the produced cone-jet is more stable against perturbations and the axis of the spray remains in the same direction through the whole stability margin, unlike the cone-jet of conventional simple nozzles.
Collapse
|
13
|
Santana M, Estevez JO, Agarwal V, Herrera-Becerra R. Room Temperature Crystallization of Hydroxyapatite in Porous Silicon Structures. NANOSCALE RESEARCH LETTERS 2016; 11:497. [PMID: 27832526 PMCID: PMC5104700 DOI: 10.1186/s11671-016-1658-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 09/22/2016] [Indexed: 06/06/2023]
Abstract
Porous silicon (PS) substrates, with different pore sizes and morphology, have been used to crystallize hydroxyapatite (HA) nano-fibers by an easy and economical procedure using a co-precipitation method at room temperature. In situ formation of HA nanoparticles, within the meso- and macroporous silicon structure, resulted in the formation of nanometer-sized hydroxyapatite crystals on/within the porous structure. The X-ray diffraction technique was used to determine the tetragonal structure of the crystals. Analysis/characterization demonstrates that under certain synthesis conditions, growth and crystallization of hydroxyapatite layer on/inside PS can be achieved at room temperature. Such composite structures expand the possibility of designing a new bio-composite material based on the hydroxyapatite and silicon synthesized at room temperature.
Collapse
Affiliation(s)
- M. Santana
- Institute of Physics, UNAM, Circuito de la Investigación Científica Ciudad Universitaria, México, C. P. 04510 México
- Posgrado en Ciencia e Ingeniería de Materiales, Circuito de la Investigación Científica, Ciudad Universitaria, Mexico, 04510 Mexico
| | - J. O. Estevez
- Institute of Physics, UNAM, Circuito de la Investigación Científica Ciudad Universitaria, México, C. P. 04510 México
| | - V. Agarwal
- Center for Engineering and Applied Sciences (CIICAp-UAEM), Av. Universidad 1001. Col. Chamilpa, Cuernavaca, Morelos 62209 México
| | - R. Herrera-Becerra
- Institute of Physics, UNAM, Circuito de la Investigación Científica Ciudad Universitaria, México, C. P. 04510 México
| |
Collapse
|
14
|
Cui W, Sun G, Qu Y, Xiong Y, Sun T, Ji Y, Yang L, Shao Z, Ma J, Zhang S, Guo X. Repair of rat calvarial defects using Si-doped hydroxyapatite scaffolds loaded with a bone morphogenetic protein-2-related peptide. J Orthop Res 2016; 34:1874-1882. [PMID: 26909759 DOI: 10.1002/jor.23208] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Accepted: 02/17/2016] [Indexed: 02/06/2023]
Abstract
Tissue engineering promises therapies ideal for treating conventional large bone injuries and defects. In the present study, we developed a novel Si-HA scaffold loaded with a synthetic BMP-2-related peptide, P28, and tested its ability to repair a critical-sized calvarial defect. We created a calvarial defect (5 mm in diameter) in the parietal bone of 32 rats and implanted one of the following biomaterials: No implant (control), Si-HA, P28/Si-HA, or rhBMP-2/Si-HA. As assessed by micro CT imaging and histological evaluations, the P28/Si-HA scaffold promoted bone recovery to a similar degree as the rhBMP-2/Si-HA scaffold. In addition, both P28/Si-HA and rhBMP-2/Si-HA promoted recovery better than Si-HA alone. The novel P28/Si-HA scaffold might represent a promising biomaterial for future bone tissue engineering applications. © 2016 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 34:1874-1882, 2016.
Collapse
Affiliation(s)
- Wei Cui
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, People's Republic of China
| | - Guangfei Sun
- Advanced Biomaterials and Tissue Engineering Center, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Yanzhen Qu
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, People's Republic of China
| | - Yi Xiong
- Department of Orthopedics, Central hospital of Enshi, Enshi, 445000, People's Republic of China
| | - Tingfang Sun
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, People's Republic of China
| | - Yanhui Ji
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, People's Republic of China
| | - Liang Yang
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, People's Republic of China
| | - Zengwu Shao
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, People's Republic of China
| | - Jun Ma
- Advanced Biomaterials and Tissue Engineering Center, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Shengmin Zhang
- Advanced Biomaterials and Tissue Engineering Center, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Xiaodong Guo
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, People's Republic of China
| |
Collapse
|
15
|
Preethanath RS, Rajesh P, Varma H, Anil S, Jansen JA, van den Beucken JJ. Combined Treatment Effects Using Bioactive-Coated Implants and Ceramic Granulate in a Rabbit Femoral Condyle Model. Clin Implant Dent Relat Res 2015; 18:666-77. [DOI: 10.1111/cid.12358] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Reghunathan S. Preethanath
- Department of Periodontics and Community Dentistry; College of Dentistry; King Saud University; Riyadh Saudi Arabia
| | - Palangadan Rajesh
- Bioceramic Laboratory; Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology; Trivandrum Kerala India
| | - Harikrishna Varma
- Bioceramic Laboratory; Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology; Trivandrum Kerala India
| | - Sukumaran Anil
- Department of Periodontics and Community Dentistry; College of Dentistry; King Saud University; Riyadh Saudi Arabia
| | - John A. Jansen
- Department of Biomaterials; Radboudumc; Nijmegen The Netherlands
| | | |
Collapse
|
16
|
Xie J, Jiang J, Davoodi P, Srinivasan MP, Wang CH. Electrohydrodynamic atomization: A two-decade effort to produce and process micro-/nanoparticulate materials. Chem Eng Sci 2015; 125:32-57. [PMID: 25684778 PMCID: PMC4322784 DOI: 10.1016/j.ces.2014.08.061] [Citation(s) in RCA: 150] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Electrohydrodynamic atomization (EHDA), also called electrospray technique, has been studied for more than one century. However, since 1990s it has begun to be used to produce and process micro-/nanostructured materials. Owing to the simplicity and flexibility in EHDA experimental setup, it has been successfully employed to generate particulate materials with controllable compositions, structures, sizes, morphologies, and shapes. EHDA has also been used to deposit micro- and nanoparticulate materials on surfaces in a well-controlled manner. All these attributes make EHDA a fascinating tool for preparing and assembling a wide range of micro- and nanostructured materials which have been exploited for use in pharmaceutics, food, and healthcare to name a few. Our goal is to review this field, which allows scientists and engineers to learn about the EHDA technique and how it might be used to create, process, and assemble micro-/nanoparticulate materials with unique and intriguing properties. We begin with a brief introduction to the mechanism and setup of EHDA technique. We then discuss issues critical to successful application of EHDA technique, including control of composition, size, shape, morphology, structure of particulate materials and their assembly. We also illustrate a few of the many potential applications of particulate materials, especially in the area of drug delivery and regenerative medicine. Next, we review the simulation and modeling of Taylor cone-jet formation for a single and co-axial nozzle. The mathematical modeling of particle transport and deposition is presented to provide a deeper understanding of the effective parameters in the preparation, collection and pattering processes. We conclude this article with a discussion on perspectives and future possibilities in this field.
Collapse
Affiliation(s)
- Jingwei Xie
- Department of Pharmaceutical Sciences and Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Jiang Jiang
- Department of Pharmaceutical Sciences and Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Pooya Davoodi
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585
| | - M. P. Srinivasan
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585
| | - Chi-Hwa Wang
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585
| |
Collapse
|
17
|
Henry MG, Cai L, Liu X, Zhang L, Dong J, Chen L, Wang Z, Wang S. Roles of hydroxyapatite allocation and microgroove dimension in promoting preosteoblastic cell functions on photocured polymer nanocomposites through nuclear distribution and alignment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:2851-60. [PMID: 25710252 DOI: 10.1021/la504994e] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
This study clarifies how hydroxyapatite (HA) allocation and microgroove dimension affect mouse preosteoblastic MC3T3-E1 cell functions on microgrooved substrates of polymer nanocomposites. Using replica molding from micromachined silicon wafer templates, we fabricated photocured poly(ε-caprolactone) triacrylate (PCLTA)/HA nanocomposite substrates with parallel microgrooves (two groove widths of 5 and 15 μm and one groove depth of 5 μm). Four types of microgrooved substrates were made: "homogeneous" ones of PCLTA and PCLTA/HA with uniform distribution and two "heterogeneous" laminated microgrooved substrates with HA only in the PCLTA matrix in the ridges or bottom. These substrates were used to regulate MC3T3-E1 cell attachment, proliferation, alignment, nuclear circularity and distribution, and mineralization. MC3T3-E1 cell attachment and proliferation were much higher on the microgrooved substrates of PCLTA/HA than on those of PCLTA, in particular, on the 5 μm wide microgrooved substrate with PCLTA/HA ridges and PCLTA bottom. The shape and distribution of MC3T3-E1 cytoskeleton and nuclei were altered by the substrate topography and HA allocation. For 5 μm wide heterogeneous microgrooved substrates with HA only in the ridges, MC3T3-E1 cells exhibited better spreading perpendicular to the microgrooves but tended to extend along the microgrooves containing HA in the bottom. The widest cells and the roundest/largest cell nuclei were observed on the heterogeneous substrate with PCLTA/HA ridges, while the narrowest cells with the best elongation were found on the homogeneous PCLTA/HA substrate. The trend in MC3T3-E1 cell mineralization on the substrates was consistent with that in cell/nuclear elongation. Osteocalcin mRNA expression was significantly higher on the PCLTA/HA substrates than on the PCLTA ones and also on the microgrooved substrates of PCLTA/HA than on the flat ones, regardless of the groove width of 5 or 15 μm.
Collapse
Affiliation(s)
- Michael G Henry
- Department of Materials Science and Engineering, The University of Tennessee , Knoxville, Tennessee 37996, United States
| | | | | | | | | | | | | | | |
Collapse
|
18
|
Nithyanandan A, Mahalingam S, Huang J, Rehman S, Draper E, Edirisinghe M. Bioinspired electrohydrodynamic ceramic patterning of curved metallic substrates. BIOINSPIRED BIOMIMETIC AND NANOBIOMATERIALS 2015. [DOI: 10.1680/bbn.14.00020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Template-assisted electrohydrodynamic atomisation (TAEA) has been used for the first time to pattern curved metallic surfaces. Parallel lines of ceramic titania (TiO2) were produced on titanium substrates, convex and concave with diameters of ~25 mm, at the ambient temperature. Optimal results were obtained with 4 wt% TiO2 in ethanol suspension deposited over 300 s during stable cone-jetting at 20 µl/min, 10kV and collection distance 80 mm. A high degree of control over pattern line width, interline spacing and thickness were achieved. Nanoindentation load-displacement curves were continuous for the full loading and unloading cycle, indicating good adhesion between pattern and substrate. At a loading rate of 1 μN/s and a hold time of 1 s, pattern hardness decreased as load increased up to 7 μN and remained at 0·1 GPa up to higher loads. Elastic modulus behaved similarly, and both were not sensitive to loading rate. The effect of heat treatment to further consolidate the patterned deposits was also investigated. Hardness of the patterns was not markedly affected by heating. This work shows that TAEA is highly controllable and compatible on a range of substrate geometries. Extending TAEA capabilities from flat to curved surfaces, enabling the bioactive patterning of different surface geometries, takes this technology closer to orthopaedic engineering applications.
Collapse
Affiliation(s)
- Anouska Nithyanandan
- PhD Researcher, Department of Mechanical Engineering, University College London, London, UK
| | | | - Jie Huang
- Lecturer of Biomaterials, Doctor, Department of Mechanical Engineering, University College London, London, UK
| | - Sarrawat Rehman
- Principal Bioengineer, JRI Orthopaedics Ltd, Chapeltown, Sheffield, UK
| | - Edward Draper
- Innovation Manager, JRI Orthopaedics Ltd, Chapeltown, Sheffield, UK
| | - Mohan Edirisinghe
- Bonfield Chair of Biomaterials, Department of Mechanical Engineering, University College London, London, UK
| |
Collapse
|
19
|
Kehr NS, Atay S, Ergün B. Self-assembled Monolayers and Nanocomposite Hydrogels of Functional Nanomaterials for Tissue Engineering Applications. Macromol Biosci 2014; 15:445-63. [DOI: 10.1002/mabi.201400363] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Nermin Seda Kehr
- Physikalisches Institut and Center for Nanotechnology; Westfälische Wilhelms-Universität Münster; Heisenbergstrasse 11 D-48149 Münster Germany
| | - Seda Atay
- Department of Nanotechnology and Nanomedicine; Hacettepe University; 06800 Ankara Turkey
| | - Bahar Ergün
- Department of Chemistry; Biochemistry Division; Hacettepe University; 06800 Ankara Turkey
| |
Collapse
|
20
|
Aniket, Reid R, Hall B, Marriott I, El-Ghannam A. Early osteoblast responses to orthopedic implants: Synergy of surface roughness and chemistry of bioactive ceramic coating. J Biomed Mater Res A 2014; 103:1961-73. [DOI: 10.1002/jbm.a.35326] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 08/24/2014] [Accepted: 09/03/2014] [Indexed: 12/22/2022]
Affiliation(s)
- Aniket
- Department of Mechanical Engineering and Materials Science; Duke University; Durham North Carolina 27708
| | - Robert Reid
- Department of Bioinformatics and Genomics; University of North Carolina at Charlotte; Charlotte North Carolina 28223
| | - Benika Hall
- Department of Bioinformatics and Genomics; University of North Carolina at Charlotte; Charlotte North Carolina 28223
| | - Ian Marriott
- Department of Biology; University of North Carolina at Charlotte; Charlotte North Carolina 28223
| | - Ahmed El-Ghannam
- Department of Mechanical Engineering and Engineering Science; University of North Carolina at Charlotte; Charlotte North Carolina 28223
| |
Collapse
|
21
|
Wijesinghe W, Mantilaka M, Premalal E, Herath H, Mahalingam S, Edirisinghe M, Rajapakse R, Rajapakse R. Facile synthesis of both needle-like and spherical hydroxyapatite nanoparticles: Effect of synthetic temperature and calcination on morphology, crystallite size and crystallinity. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 42:83-90. [DOI: 10.1016/j.msec.2014.05.032] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 03/21/2014] [Accepted: 05/07/2014] [Indexed: 12/25/2022]
|
22
|
Johansson P, Jimbo R, Kjellin P, Currie F, Chrcanovic BR, Wennerberg A. Biomechanical evaluation and surface characterization of a nano-modified surface on PEEK implants: a study in the rabbit tibia. Int J Nanomedicine 2014; 9:3903-11. [PMID: 25152620 PMCID: PMC4140704 DOI: 10.2147/ijn.s60387] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Polyether ether ketone (PEEK) is today frequently used as a biomaterial in different medical operations due to its excellent mechanical and chemical properties. However, the untreated surface of PEEK is bioinert and hydrophobic, and it does not osseointegrate in its pure form. The aim of this study was to evaluate a unique nano-modified surface of PEEK with respect to osseointegration. Forty-eight threaded, non-cutting PEEK implants were inserted bilaterally in the tibia of 24 rabbits. Half of the implants (n=24) were coated with nanocrystalline hydroxyapatite (test) and the remaining implants (n=24) were left uncoated (control). Half of the animals (n=12) were euthanized after 3 weeks of healing and the remaining (n=12) after 12 weeks. The implant retention was measured with a removal torque apparatus. Surface analysis was performed with interferometry, scanning electron microscopy, and X-ray photon spectroscopy to relate the removal torque to the applied surface. The test implants revealed a significantly higher retention after 3 weeks (P=0.05) and 12 weeks (P=0.028) compared to controls. The result of the present study proves that the addition of nanocrystalline hydroxyapatite coating to PEEK surfaces significantly increases its removal torque and biocompatibility.
Collapse
Affiliation(s)
- Pär Johansson
- Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Ryo Jimbo
- Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden
| | | | | | | | - Ann Wennerberg
- Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden
| |
Collapse
|
23
|
Lücker PB, Javaherian S, Soleas JP, Halverson D, Zandstra PW, McGuigan AP. A microgroove patterned multiwell cell culture plate for high-throughput studies of cell alignment. Biotechnol Bioeng 2014; 111:2537-48. [DOI: 10.1002/bit.25298] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2014] [Revised: 05/21/2014] [Accepted: 05/21/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Petra B. Lücker
- Department of Chemical Engineering and Applied Chemistry; University of Toronto; 200 College St. Toronto Ontario M5T 3J9 Canada
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Toronto Ontario Canada
| | - Sahar Javaherian
- Department of Chemical Engineering and Applied Chemistry; University of Toronto; 200 College St. Toronto Ontario M5T 3J9 Canada
| | - John P. Soleas
- Institute of Medical Science; University of Toronto; Toronto Ontario Canada
| | - Duncan Halverson
- Department of Chemistry; University of Toronto; Toronto Ontario Canada
| | - Peter W. Zandstra
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Toronto Ontario Canada
| | - Alison P. McGuigan
- Department of Chemical Engineering and Applied Chemistry; University of Toronto; 200 College St. Toronto Ontario M5T 3J9 Canada
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Toronto Ontario Canada
| |
Collapse
|
24
|
Kalia P, Vizcay-Barrena G, Fan JP, Warley A, Di Silvio L, Huang J. Nanohydroxyapatite shape and its potential role in bone formation: an analytical study. J R Soc Interface 2014; 11:20140004. [PMID: 24478288 DOI: 10.1098/rsif.2014.0004] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Bone cells (osteoblasts) produce a collagen-rich matrix called osteoid, which is mineralized extracellularly by nanosized calcium phosphate (CaP). Synthetically produced CaP nanoparticles (NPs) have great potential for clinical application. However few studies have compared the effect of CaP NPs with different properties, such as shape and aspect ratio, on the survival and behaviour of active bone-producing cells, such as primary human osteoblasts (HOBs). This study aimed to investigate the biocompatibility and ultrastructural effects of two differently shaped hydroxyapatite [Ca10(PO4)6(OH)2] nanoparticles (HA NPs), round- (aspect ratio 2.12, AR2) and rice-shaped (aspect ratio 3.79, AR4). The ultrastructural response and initial extracellular matrix (ECM) formation of HOBs to HA NPs were observed, as well as matrix vesicle release. A transmission electron microscopy (TEM)-based X-ray microanalytical technique was used to measure cytoplasmic ion levels, including calcium (Ca), phosphorus (P), sodium (Na) and potassium (K). K/Na ratios were used as a measure of cell viability. Following HA NP stimulation, all measured cytoplasmic ion levels increased. AR2 NPs had a greater osteogenic effect on osteoblasts compared with AR4 NPs, including alkaline phosphatase activity and matrix vesicle release. However, they produced only a moderate increase in intracellular Ca and P levels compared with AR4. This suggests that particular Ca and P concentrations may be required for, or indicative of, optimal osteoblast activity. Cell viability, as measured by Na and K microanalysis, was best maintained in AR2. Initial formation of osteoblast ECM was altered in the presence of either HA NP, and immuno-TEM identified fibronectin and matrilin-3 as two ECM proteins affected. Matrilin-3 is here described for the first time as being expressed by cultured osteoblasts. In summary, this novel and in-depth study has demonstrated that HA NP shape can influence a range of different parameters related to osteoblast viability and activity.
Collapse
Affiliation(s)
- Priya Kalia
- Biomaterials, Biomimetics and Biophotonics Division, Dental Institute, King's College London, , Tower Wing, Guy's Hospital, London SE1 9RT, UK
| | | | | | | | | | | |
Collapse
|
25
|
Biomaterial Thin Films by Soft Pulsed Laser Technologies for Biomedical Applications. LASERS IN MATERIALS SCIENCE 2014. [DOI: 10.1007/978-3-319-02898-9_11] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
|
26
|
Fan JP, Kalia P, Di Silvio L, Huang J. In vitro response of human osteoblasts to multi-step sol-gel derived bioactive glass nanoparticles for bone tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 36:206-14. [PMID: 24433905 DOI: 10.1016/j.msec.2013.12.009] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Revised: 11/28/2013] [Accepted: 12/07/2013] [Indexed: 11/25/2022]
Abstract
A multi-step sol-gel process was employed to synthesize bioactive glass (BG) nanoparticles. Transmission electron microscopy (TEM) revealed that the BG nanoparticles were spherical and ranged from 30 to 60 nm in diameter. In vitro reactivity of the BG nanoparticles was tested in phosphate buffer saline (PBS), Tris-buffer (TRIS), simulated body fluid (SBF), and Dulbecco's modified Eagle's medium (DMEM), in comparison with similar sized hydroxyapatite (HA) and silicon substituted HA (SiHA) nanoparticles. Bioactivity of the BG nanoparticles was confirmed through Fourier transform infrared spectroscopy (FTIR) analysis. It was found that bone-like apatite was formed after immersion in SBF at 7 days. Solutions containing BG nanoparticles were slightly more alkaline than HA and SiHA, suggesting that a more rapid apatite formation on BG was related to solution-mediated dissolution. Primary human osteoblast (HOB) cell model was used to evaluate biological responses to BG nanoparticles. Lactate dehydrogenase (LDH) cytotoxicity assay showed that HOB cells were not adversely affected by the BG nanoparticles throughout the 7day test period. Interestingly, MTS assay results showed an enhancement in cell proliferation in the presence of BG when compared to HA and SiHA nanoparticles. Particularly, statistically significant (p<0.05) alkaline phosphatase (ALP) activity of HOB cells was found on the culture containing BG nanoparticles, suggesting that the cell differentiation might be promoted by BG. Real-time quantitative PCR analysis (qPCR) further confirmed this finding, as a significantly higher level of RUNX2 gene expression was recorded on the cells cultured in the presence of BG nanoparticles when compared to those with HA and SiHA.
Collapse
Affiliation(s)
- Jian Ping Fan
- Department of Mechanical Engineering, University College London, London WC1E 7JE, UK.
| | - Priya Kalia
- Biomaterials, Tissue Engineering & Imaging, The Dental Institute, King's College London, Guy's Hospital, London SE1 9BT, UK
| | - Lucy Di Silvio
- Biomaterials, Tissue Engineering & Imaging, The Dental Institute, King's College London, Guy's Hospital, London SE1 9BT, UK
| | - Jie Huang
- Department of Mechanical Engineering, University College London, London WC1E 7JE, UK
| |
Collapse
|
27
|
Nithyanandan A, Mahalingam S, Huang J, Rehman S, Draper E, Edirisinghe M. Template-assisted electrohydrodynamic atomization of polycaprolactone for orthopedic patterning applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:4608-15. [PMID: 24094167 DOI: 10.1016/j.msec.2013.07.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Accepted: 07/17/2013] [Indexed: 10/26/2022]
Abstract
This paper presents the development of the novel deposition of biodegradable polycaprolactone (PCL) polymer patterns on a metallic substrate using a jet spraying technique, template-assisted electrohydrodynamic atomization (TAEA), at ambient temperature. The structure of patterns was controlled by systematically varying the polymer concentration (2-15 wt.%) and the flow rate (1-25 μl min(-1)). Polymer deposition was carried out in the stable cone-jet mode to precisely control the surface structure and morphology. The patterns were studied by optical microscopy, scanning electron microscopy and profilometry, and a high degree of control over the pattern geometry and thickness was achieved by varying the spraying time. The hardness and the effective elastic modulus of the polymer patterns were estimated using nanoindentation. The effect of load, loading rate and the holding time on the hardness and effective elastic modulus was derived. Optimal results were obtained with 5 wt.% PCL in DMAC solution sprayed within the stable cone-jet mode operating window at a flow rate of 15 μl min(-1) for 300 s at 11.1 kV with a working distance of 60mm. Hexagonal patterns were well-defined and repeatable with thickness of ~34 μm. The hardness is 1.6 MPa at a loading rate of 0.1 μN/s and nearly halved when the load rate was increased to 1 μN/s. The effective elastic modulus of ~12 MPa is obtained for a load rate of 0.1 μN/s.
Collapse
Affiliation(s)
- Anouska Nithyanandan
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom
| | | | | | | | | | | |
Collapse
|
28
|
MUNIR GILLIAN, HUANG JIE, EDIRISINGHE MOHAN, NANGREJO RAFIQUE, BONFIELD WILLIAM. ELECTROHYDRODYNAMIC PROCESSING OF CALCIUM PHOSPHATES: COATING AND PATTERNING FOR MEDICAL IMPLANTS. ACTA ACUST UNITED AC 2012. [DOI: 10.1142/s1793984411000426] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Hydroxyapatite (HA)-coated metallic prostheses, which combine the osteoconductivity of HA and high strength of metallic alloys, have been increasingly the choice of joint replacement prostheses by surgeons as the general population lives longer. Surface modification of metallic implant surfaces is one of the key focal points to implantation technology. In addition to material chemistry, surface topography has been found to positively impact cellular response and is able to enhance the life time of the implant. Recently, a new technique, template-assisted electrohydrodynamic atomization (TAEA) spraying, developed using the principles of electrohydrodynamic atomization spraying, which is an electrically driven jet-based deposition method, is of considerable interest in surface topography formation. The process offers the attractive advantages of compatibility with micro-fabrication technology and versatility in pattern specification for advanced implant designs. This technology incorporates nanosized calcium phosphate to mimic the size and chemical composition of bone mineral in a micrometer-dimension pattern configuration to guide cellular responses. In vitro studies showed that both pillar and track nano Silicon-substituted HA (SiHA) patterns were able to encourage the attachment and growth of osteoblast cells, the track patterns provided the favourite surface for the initial cell attachment while a fast cell proliferation rate was found on the pillar pattern from day 1 to day 5 in comparison with that of a SiHA-coated surface. The alignment of actin cytoskeleton of osteoblast cells matched the orientation of the entire cell. The shear peel strength of the patterned interlocking nano-HA coating was found to be at least an order of magnitude higher than the conventional HA coating. Therefore, TAEA offers great potential for producing new coatings with a tailored surface topography, on both the micro- and nano-scale in a more cost effective way to enhance the performance of medical implants.
Collapse
Affiliation(s)
- GILLIAN MUNIR
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom
| | - JIE HUANG
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom
| | - MOHAN EDIRISINGHE
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom
| | - RAFIQUE NANGREJO
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom
| | - WILLIAM BONFIELD
- Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ, United Kingdom
| |
Collapse
|
29
|
Boanini E, Torricelli P, Fini M, Sima F, Serban N, Mihailescu IN, Bigi A. Magnesium and strontium doped octacalcium phosphate thin films by matrix assisted pulsed laser evaporation. J Inorg Biochem 2012; 107:65-72. [DOI: 10.1016/j.jinorgbio.2011.11.003] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Revised: 10/28/2011] [Accepted: 11/08/2011] [Indexed: 01/28/2023]
|