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Darroch C, Digeronimo F, Asaro G, Minsart M, Pien N, van Vlierberghe S, Monaghan MG. Melt electrowriting of poly( ϵ-caprolactone)-poly(ethylene glycol) backbone polymer blend scaffolds with improved hydrophilicity and functionality. Biomed Mater 2024; 19:055011. [PMID: 38914083 DOI: 10.1088/1748-605x/ad5b41] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Accepted: 06/24/2024] [Indexed: 06/26/2024]
Abstract
Melt electrowriting (MEW) is an additive manufacturing technique that harnesses electro-hydrodynamic phenomena to produce 3D-printed fibres with diameters on the scale of 10s of microns. The ability to print at this small scale provides opportunities to create structures with incredibly fine resolution and highly defined morphology. The current gold standard material for MEW is poly(ϵ-caprolactone) (PCL), a polymer with excellent biocompatibility but lacking in chemical groups that can allow intrinsic additional functionality. To provide this functionality while maintaining PCL's positive attributes, blending was performed with a Poly(Ethylene Glycol) (PEG)-based Acrylate endcapped Urethane-based Precursor (AUP). AUPs are a group of polymers, built on a backbone of existing polymers, which introduce additional functionality by the addition of one or more acrylate groups that terminate the polymer chain of a backbone polymer. By blending with a 20kDa AUP-PEG in small amounts, it is shown that MEW attributes are preserved, producing high-quality meshes. Blends were produced in various PCL:AUP weight ratios (100:0, 90:10 and 0:100) and processed into both solvent-cast films and MEW meshes that were used to characterise the properties of the blends. It was found that the addition of AUP-PEG to PCL significantly increases the hydrophilicity of structures produced with these polymers, and adds swelling capability compared to the non-swelling PCL. The developed blend (90:10) is shown to be processable using MEW, and the quality of manufactured scaffolds is evaluated against pure PCL scaffolds by performing scanning electron microscopy image analysis, with the quality of the novel MEW blend scaffolds showing comparable quality to that of pure PCL. The presence of the functionalisable AUP material on the surface of the developed scaffolds is also confirmed using fluorescence labelling of the acrylate groups. Biocompatibility of the MEW-processable blend was confirmed through a cell viability study, which found a high degree of cytocompatibility.
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Affiliation(s)
- Conor Darroch
- Department of Mechanical, Manufacturing and Biomedical Engineering, Trinity College Dublin, Dublin 2, Ireland
| | - Francesco Digeronimo
- Department of Mechanical, Manufacturing and Biomedical Engineering, Trinity College Dublin, Dublin 2, Ireland
| | - Giuseppe Asaro
- Department of Mechanical, Manufacturing and Biomedical Engineering, Trinity College Dublin, Dublin 2, Ireland
- Advanced Materials and BioEngineering Research (AMBER) Centre at Trinity College Dublin and the Royal College of Surgeons in Ireland, Dublin 2, Ireland
| | - Manon Minsart
- Polymer Chemistry & Biomaterials Research Group, Centre of Macromolecular Chemistry (CMaC), Ghent University, Krijgslaan 281 S4-bis, 9000 Ghent, Belgium
| | - Nele Pien
- Polymer Chemistry & Biomaterials Research Group, Centre of Macromolecular Chemistry (CMaC), Ghent University, Krijgslaan 281 S4-bis, 9000 Ghent, Belgium
- Faculty of Veterinary Medicine, Department of Translational Physiology, Infectiology and Public Health, Ghent University, Salisburylaan 133, 9280 Merelbeke, Belgium
| | - Sandra van Vlierberghe
- Polymer Chemistry & Biomaterials Research Group, Centre of Macromolecular Chemistry (CMaC), Ghent University, Krijgslaan 281 S4-bis, 9000 Ghent, Belgium
| | - Michael G Monaghan
- Department of Mechanical, Manufacturing and Biomedical Engineering, Trinity College Dublin, Dublin 2, Ireland
- Advanced Materials and BioEngineering Research (AMBER) Centre at Trinity College Dublin and the Royal College of Surgeons in Ireland, Dublin 2, Ireland
- CÚRAM, Centre for Research in Medical Devices, National University of Ireland, Galway, Newcastle Road, H91 W2TY Galway, Ireland
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, 152-160 Pearse Street, Dublin 2, Ireland
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2
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Sandoval Salaiza DA, Valsangiacomo N, Dinç NU, Yildirim M, Madrid-Wolff J, Bertsch A, Jiguet S, Dalton PD, Brugger J, Moser C. Electrowriting of SU-8 Microfibers. Polymers (Basel) 2024; 16:1630. [PMID: 38931980 PMCID: PMC11207615 DOI: 10.3390/polym16121630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2024] [Revised: 05/23/2024] [Accepted: 06/06/2024] [Indexed: 06/28/2024] Open
Abstract
As microfiber-based additive manufacturing (AM) technologies, melt electrowriting (MEW) and solution electrowriting (SEW) have demonstrated efficacy with more biomedically relevant materials. By processing SU-8 resin using MEW and SEW techniques, a material with substantially different mechanical, thermal, and optical properties than that typically processed is introduced. SU-8 polymer is temperature sensitive and requires the devising of a specific heating protocol to be properly processed. Smooth-surfaced microfibers resulted from MEW of SU8 for a short period (from 30 to 90 min), which provides the greatest control and, thus, reproducibility of the printed microfibers. This investigation explores various parameters influencing the electrowriting process, printing conditions, and post-processing to optimize the fabrication of intricate 3D structures. This work demonstrates the controlled generation of straight filaments and complex multi-layered architectures, which were characterized by brightfield, darkfield, and scanning electron microscopy (SEM). This research opens new avenues for the design and development of 3D-printed photonic systems by leveraging the properties of SU-8 after both MEW and SEW processing.
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Affiliation(s)
- Diego Armando Sandoval Salaiza
- Laboratory of Applied Photonics Devices, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland; (D.A.S.S.); (N.V.); (N.U.D.); (M.Y.); (J.M.-W.)
| | - Nico Valsangiacomo
- Laboratory of Applied Photonics Devices, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland; (D.A.S.S.); (N.V.); (N.U.D.); (M.Y.); (J.M.-W.)
| | - Niyazi Ulas Dinç
- Laboratory of Applied Photonics Devices, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland; (D.A.S.S.); (N.V.); (N.U.D.); (M.Y.); (J.M.-W.)
| | - Mustafa Yildirim
- Laboratory of Applied Photonics Devices, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland; (D.A.S.S.); (N.V.); (N.U.D.); (M.Y.); (J.M.-W.)
| | - Jorge Madrid-Wolff
- Laboratory of Applied Photonics Devices, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland; (D.A.S.S.); (N.V.); (N.U.D.); (M.Y.); (J.M.-W.)
| | - Arnaud Bertsch
- Microsystems Laboratory, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland; (A.B.); (S.J.); (J.B.)
| | - Sebastien Jiguet
- Microsystems Laboratory, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland; (A.B.); (S.J.); (J.B.)
| | - Paul D. Dalton
- Phil and Penny Knight Campus for Accelerating Scientific Impact, University of Oregon, 1505 Franklin Boulevard, Eugene, OR 97403, USA;
| | - Juergen Brugger
- Microsystems Laboratory, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland; (A.B.); (S.J.); (J.B.)
| | - Christophe Moser
- Laboratory of Applied Photonics Devices, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland; (D.A.S.S.); (N.V.); (N.U.D.); (M.Y.); (J.M.-W.)
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Liu Z, Jia J, Lei Q, Wei Y, Hu Y, Lian X, Zhao L, Xie X, Bai H, He X, Si L, Livermore C, Kuang R, Zhang Y, Wang J, Yu Z, Ma X, Huang D. Electrohydrodynamic Direct-Writing Micro/Nanofibrous Architectures: Principle, Materials, and Biomedical Applications. Adv Healthc Mater 2024:e2400930. [PMID: 38847291 DOI: 10.1002/adhm.202400930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 05/21/2024] [Indexed: 07/05/2024]
Abstract
Electrohydrodynamic (EHD) direct-writing has recently gained attention as a highly promising additive manufacturing strategy for fabricating intricate micro/nanoscale architectures. This technique is particularly well-suited for mimicking the extracellular matrix (ECM) present in biological tissue, which serves a vital function in facilitating cell colonization, migration, and growth. The integration of EHD direct-writing with other techniques has been employed to enhance the biological performance of scaffolds, and significant advancements have been made in the development of tailored scaffold architectures and constituents to meet the specific requirements of various biomedical applications. Here, a comprehensive overview of EHD direct-writing is provided, including its underlying principles, demonstrated materials systems, and biomedical applications. A brief chronology of EHD direct-writing is provided, along with an examination of the observed phenomena that occur during the printing process. The impact of biomaterial selection and architectural topographic cues on biological performance is also highlighted. Finally, the major limitations associated with EHD direct-writing are discussed.
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Affiliation(s)
- Zhengjiang Liu
- Department of Biomedical Engineering, Research Center for Nano-biomaterials & Regenerative Medicine, College of biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
| | - Jinqiao Jia
- Department of Biomedical Engineering, Research Center for Nano-biomaterials & Regenerative Medicine, College of biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
| | - Qi Lei
- Department of Biomedical Engineering, Research Center for Nano-biomaterials & Regenerative Medicine, College of biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
- Shanxi-Zheda Institute of advanced Materials and Chemical Engineering, Taiyuan, 030032, P. R. China
| | - Yan Wei
- Department of Biomedical Engineering, Research Center for Nano-biomaterials & Regenerative Medicine, College of biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
- Shanxi-Zheda Institute of advanced Materials and Chemical Engineering, Taiyuan, 030032, P. R. China
| | - Yinchun Hu
- Department of Biomedical Engineering, Research Center for Nano-biomaterials & Regenerative Medicine, College of biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
- Shanxi-Zheda Institute of advanced Materials and Chemical Engineering, Taiyuan, 030032, P. R. China
| | - Xiaojie Lian
- Department of Biomedical Engineering, Research Center for Nano-biomaterials & Regenerative Medicine, College of biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
- Shanxi-Zheda Institute of advanced Materials and Chemical Engineering, Taiyuan, 030032, P. R. China
| | - Liqin Zhao
- Department of Biomedical Engineering, Research Center for Nano-biomaterials & Regenerative Medicine, College of biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
- Shanxi-Zheda Institute of advanced Materials and Chemical Engineering, Taiyuan, 030032, P. R. China
| | - Xin Xie
- Xellar Biosystems, Cambridge, MA, 02458, USA
| | - Haiqing Bai
- Xellar Biosystems, Cambridge, MA, 02458, USA
| | - Xiaomin He
- Xellar Biosystems, Cambridge, MA, 02458, USA
| | - Longlong Si
- Key Laboratory of Quantitative Synthetic Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Carol Livermore
- Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA, 02115, USA
| | - Rong Kuang
- Zhejiang Institute for Food and Drug Control, Hangzhou, 310000, P. R. China
| | - Yi Zhang
- Biotherapy Center and Cancer Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, 450052, P. R. China
| | - Jiucun Wang
- Human Phenome Institute, Fudan University, Shanghai, 200433, P. R. China
| | - Zhaoyan Yu
- Shandong Public Health Clinical Center, Shandong University, Jinan, 250000, P. R. China
| | - Xudong Ma
- Cytori Therapeutics LLC., Shanghai, 201802, P. R. China
| | - Di Huang
- Department of Biomedical Engineering, Research Center for Nano-biomaterials & Regenerative Medicine, College of biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
- Shanxi-Zheda Institute of advanced Materials and Chemical Engineering, Taiyuan, 030032, P. R. China
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Snow F, O'Connell C, Yang P, Kita M, Pirogova E, Williams RJ, Kapsa RMI, Quigley A. Engineering interfacial tissues: The myotendinous junction. APL Bioeng 2024; 8:021505. [PMID: 38841690 PMCID: PMC11151436 DOI: 10.1063/5.0189221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 05/06/2024] [Indexed: 06/07/2024] Open
Abstract
The myotendinous junction (MTJ) is the interface connecting skeletal muscle and tendon tissues. This specialized region represents the bridge that facilitates the transmission of contractile forces from muscle to tendon, and ultimately the skeletal system for the creation of movement. MTJs are, therefore, subject to high stress concentrations, rendering them susceptible to severe, life-altering injuries. Despite the scarcity of knowledge obtained from MTJ formation during embryogenesis, several attempts have been made to engineer this complex interfacial tissue. These attempts, however, fail to achieve the level of maturity and mechanical complexity required for in vivo transplantation. This review summarizes the strategies taken to engineer the MTJ, with an emphasis on how transitioning from static to mechanically inducive dynamic cultures may assist in achieving myotendinous maturity.
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Ye X, Zhang E, Huang Y, Tian F, Xue J. 3D-printed electrospun fibres for wound healing. Wound Repair Regen 2024; 32:195-207. [PMID: 37753874 DOI: 10.1111/wrr.13119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 08/09/2023] [Accepted: 09/06/2023] [Indexed: 09/28/2023]
Abstract
Wound management for acute and chronic wounds has become a serious clinical problem worldwide, placing considerable pressure on public health systems. Owing to the high-precision, adjustable pore structure, and repeatable manufacturing process, 3D-printed electrospun fibre (3DP-ESF) has attracted widespread attention for fabricating wound dressing. In addition, in comparison with 2D electrospun fibre membranes fabricated by traditional electrospinning, the 3D structures provide additional guidance on cell behaviour. In this perspective article, we first summarise the basic manufacturing principles and methods to fabricate 3DP-ESF. Then, we discuss the function of 3DP-ESF in manipulating the different stages of wound healing, including anti-bacteria, anti-inflammation, and promotion of cell migration and proliferation, as well as the construction of tissue-engineered scaffolds. In the end, we provide the current challenge faced by 3DP-ESF in the application of skin wound regeneration and its promising future directions.
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Affiliation(s)
- Xilin Ye
- Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, People's Republic of China
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, People's Republic of China
| | - Enshuo Zhang
- Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, People's Republic of China
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, People's Republic of China
| | - Yaqin Huang
- Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, People's Republic of China
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, People's Republic of China
| | - Feng Tian
- Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, People's Republic of China
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, People's Republic of China
| | - Jiajia Xue
- Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, People's Republic of China
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, People's Republic of China
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6
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Viola M, Ainsworth MJ, Mihajlovic M, Cedillo-Servin G, van Steenbergen MJ, van Rijen M, de Ruijter M, Castilho M, Malda J, Vermonden T. Covalent Grafting of Functionalized MEW Fibers to Silk Fibroin Hydrogels to Obtain Reinforced Tissue Engineered Constructs. Biomacromolecules 2024; 25:1563-1577. [PMID: 38323427 PMCID: PMC10934835 DOI: 10.1021/acs.biomac.3c01147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 01/15/2024] [Accepted: 01/16/2024] [Indexed: 02/08/2024]
Abstract
Hydrogels are ideal materials to encapsulate cells, making them suitable for applications in tissue engineering and regenerative medicine. However, they generally do not possess adequate mechanical strength to functionally replace human tissues, and therefore they often need to be combined with reinforcing structures. While the interaction at the interface between the hydrogel and reinforcing structure is imperative for mechanical function and subsequent biological performance, this interaction is often overlooked. Melt electrowriting enables the production of reinforcing microscale fibers that can be effectively integrated with hydrogels. Yet, studies on the interaction between these micrometer scale fibers and hydrogels are limited. Here, we explored the influence of covalent interfacial interactions between reinforcing structures and silk fibroin methacryloyl hydrogels (silkMA) on the mechanical properties of the construct and cartilage-specific matrix production in vitro. For this, melt electrowritten fibers of a thermoplastic polymer blend (poly(hydroxymethylglycolide-co-ε-caprolactone):poly(ε-caprolactone) (pHMGCL:PCL)) were compared to those of the respective methacrylated polymer blend pMHMGCL:PCL as reinforcing structures. Photopolymerization of the methacrylate groups, present in both silkMA and pMHMGCL, was used to generate hybrid materials. Covalent bonding between the pMHMGCL:PCL blend and silkMA hydrogels resulted in an elastic response to the application of torque. In addition, an improved resistance was observed to compression (∼3-fold) and traction (∼40-55%) by the scaffolds with covalent links at the interface compared to those without these interactions. Biologically, both types of scaffolds (pHMGCL:PCL and pMHMGCL:PCL) showed similar levels of viability and metabolic activity, also compared to frequently used PCL. Moreover, articular cartilage progenitor cells embedded within the reinforced silkMA hydrogel were able to form a cartilage-like matrix after 28 days of in vitro culture. This study shows that hybrid cartilage constructs can be engineered with tunable mechanical properties by grafting silkMA hydrogels covalently to pMHMGCL:PCL blend microfibers at the interface.
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Affiliation(s)
- Martina Viola
- Department
of Pharmaceutical Sciences, Division of Pharmaceutics, Utrecht Institute
for Pharmaceutical Sciences (UIPS), Utrecht
University, 3508 TB Utrecht, The Netherlands
- Department
of Orthopedics, University Medical Centre
Utrecht, 3584 CT Utrecht, The Netherlands
| | - Madison J. Ainsworth
- Department
of Orthopedics, University Medical Centre
Utrecht, 3584 CT Utrecht, The Netherlands
| | - Marko Mihajlovic
- Department
of Pharmaceutical Sciences, Division of Pharmaceutics, Utrecht Institute
for Pharmaceutical Sciences (UIPS), Utrecht
University, 3508 TB Utrecht, The Netherlands
| | - Gerardo Cedillo-Servin
- Department
of Orthopedics, University Medical Centre
Utrecht, 3584 CT Utrecht, The Netherlands
- Department
of Biomedical Engineering, Technical University
of Eindhoven, 5612 AE Eindhoven, The Netherlands
| | - Mies J. van Steenbergen
- Department
of Pharmaceutical Sciences, Division of Pharmaceutics, Utrecht Institute
for Pharmaceutical Sciences (UIPS), Utrecht
University, 3508 TB Utrecht, The Netherlands
| | - Mattie van Rijen
- Department
of Orthopedics, University Medical Centre
Utrecht, 3584 CT Utrecht, The Netherlands
| | - Mylène de Ruijter
- Department
of Orthopedics, University Medical Centre
Utrecht, 3584 CT Utrecht, The Netherlands
- Department
Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, 3584
CS Utrecht, The Netherlands
| | - Miguel Castilho
- Department
of Biomedical Engineering, Technical University
of Eindhoven, 5612 AE Eindhoven, The Netherlands
- Institute
for Complex Molecular Systems, Eindhoven
University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Jos Malda
- Department
of Orthopedics, University Medical Centre
Utrecht, 3584 CT Utrecht, The Netherlands
- Department
Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, 3584
CS Utrecht, The Netherlands
| | - Tina Vermonden
- Department
of Pharmaceutical Sciences, Division of Pharmaceutics, Utrecht Institute
for Pharmaceutical Sciences (UIPS), Utrecht
University, 3508 TB Utrecht, The Netherlands
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Shi S, Abbas Z, Zhao X, Liang J, Wang D. Deposition of Uniform Nanoscale Patterns on Silicon Dioxide Based on Coaxial Jet Direct Writing. Polymers (Basel) 2023; 15:3702. [PMID: 37765556 PMCID: PMC10535386 DOI: 10.3390/polym15183702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 08/30/2023] [Accepted: 09/01/2023] [Indexed: 09/29/2023] Open
Abstract
To increase the printing stability of low-viscosity solutions, an auxiliary method was proposed using a coaxial electrohydrodynamic jet. A high-viscosity solution was employed as the outer layer in the printing process, and it could be removed (dissolved away) after printing the structures. A combination of mechanical and electrical forces was proposed to enhance the consistency, durability, and alignment of the printed versatile structures. The instability of the jet trajectory (which arose from the repulsion between the jet and the base with a residual charge, in addition to the winding effect of the solution) was also reduced using the drag force along the direction of movement. Moreover, the jet velocity, the surface charge, and the influence of various working voltages on the jet speed were simulated. An array of IDT-BT nanostructures measuring about 100 nm was prepared on silicon dioxide (using an inner needle with a diameter of 130 µm) by equating the moving speed (350 mm/s) of the substrate to the speed of the jet. Moreover, the moving speed (350 mm/s) of the substrate was compared exclusively to the speed of the jet. The method proposed throughout this study can provide a reference for enhancing the stability of low-viscosity solutions on substrates for high-efficiency fabrication devices (NEMS/MEMS).
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Affiliation(s)
- Shiwei Shi
- Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian 116024, China; (Z.A.); (X.Z.); (J.L.); (D.W.)
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Van Ombergen A, Chalupa-Gantner F, Chansoria P, Colosimo BM, Costantini M, Domingos M, Dufour A, De Maria C, Groll J, Jungst T, Levato R, Malda J, Margarita A, Marquette C, Ovsianikov A, Petiot E, Read S, Surdo L, Swieszkowski W, Vozzi G, Windisch J, Zenobi-Wong M, Gelinsky M. 3D Bioprinting in Microgravity: Opportunities, Challenges, and Possible Applications in Space. Adv Healthc Mater 2023; 12:e2300443. [PMID: 37353904 DOI: 10.1002/adhm.202300443] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 05/12/2023] [Indexed: 06/25/2023]
Abstract
3D bioprinting has developed tremendously in the last couple of years and enables the fabrication of simple, as well as complex, tissue models. The international space agencies have recognized the unique opportunities of these technologies for manufacturing cell and tissue models for basic research in space, in particular for investigating the effects of microgravity and cosmic radiation on different types of human tissues. In addition, bioprinting is capable of producing clinically applicable tissue grafts, and its implementation in space therefore can support the autonomous medical treatment options for astronauts in future long term and far-distant space missions. The article discusses opportunities but also challenges of operating different types of bioprinters under space conditions, mainly in microgravity. While some process steps, most of which involving the handling of liquids, are challenging under microgravity, this environment can help overcome problems such as cell sedimentation in low viscous bioinks. Hopefully, this publication will motivate more researchers to engage in the topic, with publicly available bioprinting opportunities becoming available at the International Space Station (ISS) in the imminent future.
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Affiliation(s)
- Angelique Van Ombergen
- SciSpacE Team, Directorate of Human and Robotic Exploration Programmes (HRE), European Space Agency (ESA), Keplerlaan 1, Noordwijk, 2201AG, The Netherlands
- ESA Topical Team on "3D Bioprinting of living tissue for utilization in space exploration and extraterrestrial human settlements", 01307, Dresden, Germany
| | - Franziska Chalupa-Gantner
- Research Group 3D Printing and Biofabrication, Institute of Materials Science and Technology, Austrian Cluster for Tissue Regeneration, TU Wien, Getreidemarkt 9/E308, Vienna, 1060, Austria
| | - Parth Chansoria
- Tissue Engineering + Biofabrication Laboratory, Department of Health Sciences and Technology, ETH Zurich Otto-Stern-Weg 7, Zürich, 8093, Switzerland
| | - Bianca Maria Colosimo
- ESA Topical Team on "3D Bioprinting of living tissue for utilization in space exploration and extraterrestrial human settlements", 01307, Dresden, Germany
- Department of Mechanical Engineering, Politecnico di Milano, Via La Masa 1, Milano, 20156, Italy
| | - Marco Costantini
- Institute of Physical Chemistry, Polish Academy of Sciences, Ul. Kasprzaka 44/52, Warsaw, 01-224, Poland
| | - Marco Domingos
- ESA Topical Team on "3D Bioprinting of living tissue for utilization in space exploration and extraterrestrial human settlements", 01307, Dresden, Germany
- Department of Mechanical, Aerospace and Civil Engineering, School of Engineering, Faculty of Science and Engineering & Henry Royce Institute, University of Manchester, M13 9PL, Manchester, UK
| | - Alexandre Dufour
- 3d.FAB - ICBMS, CNRS UMR 5246, University Claude Bernard-Lyon 1 and University of Lyon, 1 rue Victor Grignard, Villeurbanne, 69100, France
| | - Carmelo De Maria
- Department of Information Engineering (DII) and Research Center "E. Piaggio", University of Pisa, Largo Lucio Lazzarino 1, Pisa, 56122, Italy
| | - Jürgen Groll
- ESA Topical Team on "3D Bioprinting of living tissue for utilization in space exploration and extraterrestrial human settlements", 01307, Dresden, Germany
- Department of Functional Materials in Medicine and Dentistry at the Institute of Functional Materials and Biofabrication (IFB) and Bavarian Polymer Institute (BPI), University of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Tomasz Jungst
- Department of Functional Materials in Medicine and Dentistry at the Institute of Functional Materials and Biofabrication (IFB) and Bavarian Polymer Institute (BPI), University of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Riccardo Levato
- Department of Orthopaedics, University Medical Center Utrecht, Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, 3584 CX, The Netherlands
| | - Jos Malda
- ESA Topical Team on "3D Bioprinting of living tissue for utilization in space exploration and extraterrestrial human settlements", 01307, Dresden, Germany
- Department of Orthopaedics, University Medical Center Utrecht, Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, 3584 CX, The Netherlands
| | - Alessandro Margarita
- Department of Mechanical Engineering, Politecnico di Milano, Via La Masa 1, Milano, 20156, Italy
| | - Christophe Marquette
- ESA Topical Team on "3D Bioprinting of living tissue for utilization in space exploration and extraterrestrial human settlements", 01307, Dresden, Germany
- 3d.FAB - ICBMS, CNRS UMR 5246, University Claude Bernard-Lyon 1 and University of Lyon, 1 rue Victor Grignard, Villeurbanne, 69100, France
| | - Aleksandr Ovsianikov
- ESA Topical Team on "3D Bioprinting of living tissue for utilization in space exploration and extraterrestrial human settlements", 01307, Dresden, Germany
- Research Group 3D Printing and Biofabrication, Institute of Materials Science and Technology, Austrian Cluster for Tissue Regeneration, TU Wien, Getreidemarkt 9/E308, Vienna, 1060, Austria
| | - Emma Petiot
- 3d.FAB - ICBMS, CNRS UMR 5246, University Claude Bernard-Lyon 1 and University of Lyon, 1 rue Victor Grignard, Villeurbanne, 69100, France
| | - Sophia Read
- Department of Mechanical, Aerospace and Civil Engineering, School of Engineering, Faculty of Science and Engineering & Henry Royce Institute, University of Manchester, M13 9PL, Manchester, UK
| | - Leonardo Surdo
- ESA Topical Team on "3D Bioprinting of living tissue for utilization in space exploration and extraterrestrial human settlements", 01307, Dresden, Germany
- Space Applications Services NV/SA for the European Space Agency (ESA), Keplerlaan 1, Noordwijk, 2201AG, The Netherlands
| | - Wojciech Swieszkowski
- ESA Topical Team on "3D Bioprinting of living tissue for utilization in space exploration and extraterrestrial human settlements", 01307, Dresden, Germany
- Biomaterials Group, Materials Design Division, Faculty of Materials Science and Engineering, Warsaw University of Technology, Woloska Str. 141, Warsaw, 02-507, Poland
| | - Giovanni Vozzi
- ESA Topical Team on "3D Bioprinting of living tissue for utilization in space exploration and extraterrestrial human settlements", 01307, Dresden, Germany
- Department of Information Engineering (DII) and Research Center "E. Piaggio", University of Pisa, Largo Lucio Lazzarino 1, Pisa, 56122, Italy
| | - Johannes Windisch
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital and Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Fetscherstr. 74, 01307, Dresden, Germany
| | - Marcy Zenobi-Wong
- ESA Topical Team on "3D Bioprinting of living tissue for utilization in space exploration and extraterrestrial human settlements", 01307, Dresden, Germany
- Tissue Engineering + Biofabrication Laboratory, Department of Health Sciences and Technology, ETH Zurich Otto-Stern-Weg 7, Zürich, 8093, Switzerland
| | - Michael Gelinsky
- ESA Topical Team on "3D Bioprinting of living tissue for utilization in space exploration and extraterrestrial human settlements", 01307, Dresden, Germany
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital and Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Fetscherstr. 74, 01307, Dresden, Germany
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9
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Javadzadeh M, Del Barrio J, Sánchez-Somolinos C. Melt Electrowriting of Liquid Crystal Elastomer Scaffolds with Programmed Mechanical Response. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2209244. [PMID: 36459991 DOI: 10.1002/adma.202209244] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 11/22/2022] [Indexed: 06/17/2023]
Abstract
Recently, significant advances have been achieved to precisely program the response of liquid crystal elastomers (LCEs) through extrusion-based additive manufacturing techniques; however, important challenges remain, especially when well-defined scaffolds based on ultrafine fibers are required. Here the melt electrowriting of reactive liquid crystalline inks, leading, after ultraviolet-light-induced crosslinking, to digitally positioned uniform LCE fibers with diameters ranging from hundreds of nanometers to tens of micrometers is presented, which is hardly accessible with conventional extrusion-based printing techniques. The electrowriting process induces the preferential alignment of the mesogens parallel to the fiber's axis. Such an alignment, defined by the printing path, determines the mechanical response of the crosslinked material upon stimulation. This manufacturing platform allows the preparation of open square lattice scaffolds with ultrafine fibers (a few micrometers in diameter), periods as small as 90 µm, and well-defined morphology. Additionally, the combination of accurate fiber stacking (up to 50 layers) and fiber fusion between layers leads to unprecedented microstructures composed of high-aspect-ratio LCE thin walls. The possibility of digitally controlling the printing of fibers allows the preparation complex fiber-based scaffolds with programmed and reversible shape-morphing, thus opening new avenues to prepare miniaturized actuators and smart structures for soft robotics and biomedical applications.
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Affiliation(s)
- Mehrzad Javadzadeh
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Departamento de Física de la Materia Condensada, Zaragoza, 50009, Spain
| | - Jesús Del Barrio
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Departamento de Química Orgánica, Zaragoza, 50009, Spain
| | - Carlos Sánchez-Somolinos
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Departamento de Física de la Materia Condensada, Zaragoza, 50009, Spain
- Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III, Zaragoza, 50018, Spain
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10
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da Cunha MNB, Rynkevic R, da Silva MET, Moreira da Silva Brandão AF, Alves JL, Fernandes AA. Melt Electrospinning Writing of Mesh Implants for Pelvic Organ Prolapse Repair. 3D PRINTING AND ADDITIVE MANUFACTURING 2022; 9:389-398. [PMID: 36660296 PMCID: PMC9831559 DOI: 10.1089/3dp.2021.0010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Over the past decade, melt electrospinning writing has attracted renewed attention. When combined with three-dimensional (3D) printing capabilities, complex 3D structures can be produced, from ultrafine fibers in the absence of toxic solvents, making it particularly attractive to fabricate customized scaffolds and implants for medical applications. This research aimed to develop novel less stiff vaginal mesh implants for pelvic organ prolapse (POP) repair, matching the physiological biomechanics of vaginal tissues. The main objectives, to attain that goal, were: development of a melt electrospinning writing prototype, with additive manufacturing capability, to produce complex structures from micrometer scale fibers, in a direct 3D printing mode; and design and validate new concepts of biodegradable meshes/scaffolds with new geometries, for POP repair. The melt electrospinning writing prototype was built based on different modules. Biodegradable polycaprolactone was used to produce novel implants: three geometries and two fiber configurations were employed. The commercially available Restorelle® (Coloplast) mesh was used as a benchmark. Printed implants were analyzed via scanning electron microscopy (SEM) and uniaxial tensile testing. The SEM images showed that the geometry is generally well produced; however, some minor deviations are visible due to charge interactions. The tensile test results indicated that, regardless of the geometry, the samples showed an elastic behavior for smaller displacements; aplastic behavior dominates later stages. In the physiological range of deformation, the novel meshes (80 μm fiber diameter) matched the tissue properties (p > 0.05). The Restorelle mesh was significantly stiffer than vaginal tissue (p < 0.05) and novel meshes. The precision of the various geometrical patterns and fiber diameters produced highlights the success of the designed and built prototype equipment. Results showed that the biodegradable meshes produced are biomechanically more compatible with native tissue than commercial implants.
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Affiliation(s)
| | - Rita Rynkevic
- Mechanical Department, LAETA, INEGI, Faculty of Engineering, University of Porto, Porto, Portugal
| | | | | | - Jorge Lino Alves
- Mechanical Department, LAETA, INEGI, Faculty of Engineering, University of Porto, Porto, Portugal
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11
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Loewner S, Heene S, Baroth T, Heymann H, Cholewa F, Blume H, Blume C. Recent advances in melt electro writing for tissue engineering for 3D printing of microporous scaffolds for tissue engineering. Front Bioeng Biotechnol 2022; 10:896719. [PMID: 36061443 PMCID: PMC9428513 DOI: 10.3389/fbioe.2022.896719] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 07/27/2022] [Indexed: 11/13/2022] Open
Abstract
Melt electro writing (MEW) is a high-resolution 3D printing technique that combines elements of electro-hydrodynamic fiber attraction and melts extrusion. The ability to precisely deposit micro- to nanometer strands of biocompatible polymers in a layer-by-layer fashion makes MEW a promising scaffold fabrication method for all kinds of tissue engineering applications. This review describes possibilities to optimize multi-parametric MEW processes for precise fiber deposition over multiple layers and prevent printing defects. Printing protocols for nonlinear scaffolds structures, concrete MEW scaffold pore geometries and printable biocompatible materials for MEW are introduced. The review discusses approaches to combining MEW with other fabrication techniques with the purpose to generate advanced scaffolds structures. The outlined MEW printer modifications enable customizable collector shapes or sacrificial materials for non-planar fiber deposition and nozzle adjustments allow redesigned fiber properties for specific applications. Altogether, MEW opens a new chapter of scaffold design by 3D printing.
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Affiliation(s)
- Sebastian Loewner
- Institute of Technical Chemistry, Leibniz University Hannover, Hannover, Germany
- *Correspondence: Sebastian Loewner,
| | - Sebastian Heene
- Institute of Technical Chemistry, Leibniz University Hannover, Hannover, Germany
| | - Timo Baroth
- Institute of Microelectronic Systems, Leibniz University Hannover, Hannover, Germany
| | - Henrik Heymann
- Institute of Microelectronic Systems, Leibniz University Hannover, Hannover, Germany
| | - Fabian Cholewa
- Institute of Microelectronic Systems, Leibniz University Hannover, Hannover, Germany
| | - Holger Blume
- Institute of Microelectronic Systems, Leibniz University Hannover, Hannover, Germany
| | - Cornelia Blume
- Institute of Technical Chemistry, Leibniz University Hannover, Hannover, Germany
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12
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An R, Strissel PL, Al-Abboodi M, Robering JW, Supachai R, Eckstein M, Peddi A, Hauck T, Bäuerle T, Boccaccini AR, Youssef A, Sun J, Strick R, Horch RE, Boos AM, Kengelbach-Weigand A. An Innovative Arteriovenous (AV) Loop Breast Cancer Model Tailored for Cancer Research. Bioengineering (Basel) 2022; 9:bioengineering9070280. [PMID: 35877331 PMCID: PMC9311974 DOI: 10.3390/bioengineering9070280] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 06/09/2022] [Accepted: 06/17/2022] [Indexed: 11/16/2022] Open
Abstract
Animal models are important tools to investigate the pathogenesis and develop treatment strategies for breast cancer in humans. In this study, we developed a new three-dimensional in vivo arteriovenous loop model of human breast cancer with the aid of biodegradable materials, including fibrin, alginate, and polycaprolactone. We examined the in vivo effects of various matrices on the growth of breast cancer cells by imaging and immunohistochemistry evaluation. Our findings clearly demonstrate that vascularized breast cancer microtissues could be engineered and recapitulate the in vivo situation and tumor-stromal interaction within an isolated environment in an in vivo organism. Alginate–fibrin hybrid matrices were considered as a highly powerful material for breast tumor engineering based on its stability and biocompatibility. We propose that the novel tumor model may not only serve as an invaluable platform for analyzing and understanding the molecular mechanisms and pattern of oncologic diseases, but also be tailored for individual therapy via transplantation of breast cancer patient-derived tumors.
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Affiliation(s)
- Ran An
- Laboratory for Tissue Engineering and Regenerative Medicine, Department of Plastic and Hand Surgery, University Hospital Erlangen, 91054 Erlangen, Germany; (R.A.); (M.A.-A.); (J.W.R.); (A.P.); (T.H.); (R.E.H.); (A.M.B.)
- Department of Plastic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China;
| | - Pamela L. Strissel
- Department of Obstetrics and Gynecology, University Hospital Erlangen, 91054 Erlangen, Germany; (P.L.S.); (R.S.)
| | - Majida Al-Abboodi
- Laboratory for Tissue Engineering and Regenerative Medicine, Department of Plastic and Hand Surgery, University Hospital Erlangen, 91054 Erlangen, Germany; (R.A.); (M.A.-A.); (J.W.R.); (A.P.); (T.H.); (R.E.H.); (A.M.B.)
- Institute of Genetic Engineering and Biotechnology, University of Baghdad, Baghdad 10081, Iraq
| | - Jan W. Robering
- Laboratory for Tissue Engineering and Regenerative Medicine, Department of Plastic and Hand Surgery, University Hospital Erlangen, 91054 Erlangen, Germany; (R.A.); (M.A.-A.); (J.W.R.); (A.P.); (T.H.); (R.E.H.); (A.M.B.)
- Department of Plastic- and Hand Surgery, University Hospital RWTH Aachen, 52074 Aachen, Germany
| | - Reakasame Supachai
- Institute of Biomaterials, Friedrich-Alexander University Erlangen-Nürnberg, 91056 Erlangen, Germany; (R.S.); (A.R.B.)
| | - Markus Eckstein
- Institute of Pathology, University Hospital Erlangen, 91054 Erlangen, Germany;
| | - Ajay Peddi
- Laboratory for Tissue Engineering and Regenerative Medicine, Department of Plastic and Hand Surgery, University Hospital Erlangen, 91054 Erlangen, Germany; (R.A.); (M.A.-A.); (J.W.R.); (A.P.); (T.H.); (R.E.H.); (A.M.B.)
- Institute of Clinical Radiology, University Hospital Münster, 48149 Münster, Germany
| | - Theresa Hauck
- Laboratory for Tissue Engineering and Regenerative Medicine, Department of Plastic and Hand Surgery, University Hospital Erlangen, 91054 Erlangen, Germany; (R.A.); (M.A.-A.); (J.W.R.); (A.P.); (T.H.); (R.E.H.); (A.M.B.)
| | - Tobias Bäuerle
- Preclinical Imaging Platform Erlangen (PIPE), Department of Radiology, University Hospital Erlangen, 91054 Erlangen, Germany;
| | - Aldo R. Boccaccini
- Institute of Biomaterials, Friedrich-Alexander University Erlangen-Nürnberg, 91056 Erlangen, Germany; (R.S.); (A.R.B.)
| | - Almoatazbellah Youssef
- Department of Functional Materials in Medicine and Dentistry, University of Würzburg, 97080 Würzburg, Germany;
- Institute of Pathology, University of Würzburg, 97080 Würzburg, Germany
| | - Jiaming Sun
- Department of Plastic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China;
| | - Reiner Strick
- Department of Obstetrics and Gynecology, University Hospital Erlangen, 91054 Erlangen, Germany; (P.L.S.); (R.S.)
| | - Raymund E. Horch
- Laboratory for Tissue Engineering and Regenerative Medicine, Department of Plastic and Hand Surgery, University Hospital Erlangen, 91054 Erlangen, Germany; (R.A.); (M.A.-A.); (J.W.R.); (A.P.); (T.H.); (R.E.H.); (A.M.B.)
| | - Anja M. Boos
- Laboratory for Tissue Engineering and Regenerative Medicine, Department of Plastic and Hand Surgery, University Hospital Erlangen, 91054 Erlangen, Germany; (R.A.); (M.A.-A.); (J.W.R.); (A.P.); (T.H.); (R.E.H.); (A.M.B.)
- Department of Plastic- and Hand Surgery, University Hospital RWTH Aachen, 52074 Aachen, Germany
| | - Annika Kengelbach-Weigand
- Laboratory for Tissue Engineering and Regenerative Medicine, Department of Plastic and Hand Surgery, University Hospital Erlangen, 91054 Erlangen, Germany; (R.A.); (M.A.-A.); (J.W.R.); (A.P.); (T.H.); (R.E.H.); (A.M.B.)
- Correspondence:
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13
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3D Plotting of Calcium Phosphate Cement and Melt Electrowriting of Polycaprolactone Microfibers in One Scaffold: A Hybrid Additive Manufacturing Process. J Funct Biomater 2022; 13:jfb13020075. [PMID: 35735931 PMCID: PMC9225379 DOI: 10.3390/jfb13020075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 05/31/2022] [Accepted: 06/05/2022] [Indexed: 11/17/2022] Open
Abstract
The fabrication of patient-specific scaffolds for bone substitutes is possible through extrusion-based 3D printing of calcium phosphate cements (CPC) which allows the generation of structures with a high degree of customization and interconnected porosity. Given the brittleness of this clinically approved material, the stability of open-porous scaffolds cannot always be secured. Herein, a multi-technological approach allowed the simultaneous combination of CPC printing with melt electrowriting (MEW) of polycaprolactone (PCL) microfibers in an alternating, tunable design in one automated fabrication process. The hybrid CPC+PCL scaffolds with varying CPC strand distance (800-2000 µm) and integrated PCL fibers featured a strong CPC to PCL interface. While no adverse effect on mechanical stiffness was detected by the PCL-supported scaffold design; the microfiber integration led to an improved integrity. The pore distance between CPC strands was gradually increased to identify at which critical CPC porosity the microfibers would have a significant impact on pore bridging behavior and growth of seeded cells. At a CPC strand distance of 1600 µm, after 2 weeks of cultivation, the incorporation of PCL fibers led to pore coverage by a human mesenchymal stem cell line and an elevated proliferation level of murine pre-osteoblasts. The integrated fabrication approach allows versatile design adjustments on different levels.
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14
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Mair V, Paulus I, Groll J, Ryma M. Freeform printing of thermoresponsive poly(2-cyclopropyl-oxazoline) as cytocompatible and on-demand dissolving template of hollow channel networks in cell-laden hydrogels. Biofabrication 2022; 14. [PMID: 35193128 DOI: 10.1088/1758-5090/ac57a7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 02/22/2022] [Indexed: 11/11/2022]
Abstract
Conventional additive-manufacturing technologies rely on the vertical stacking of layers, whereas each layer provides the structural integrity for the upcoming one. This inherently gives rise to limitations in freedom of design especially when structures containing large voids or truly 3D pathways for printed filaments are aspired. An especially interesting technique, which overcomes these layer limitations, is freeform printing, where thermoplastic materials are printed in 3D through controlling the temperature profile such that the polymer melt solidifies right when it exits the nozzle. In this study, we introduce freeform printing for thermoresponsive polymers at the example of poly(2-cyclopropyl-oxazoline) (PcycloPrOx). This material is especially interesting for biofabrication, as poly(oxazoline)s are known to provide excellent cytocompatibility. Furthermore, (PcycloPrOx) scaffolds provide adequate stability, so that the printed structures can be embedded in cell-laden hydrogels and sufficient time remains for the gel to form around the scaffold before dissolution via temperature reduction. This ensures accuracy and prevents channel collapse for the creation of cell-laden hydrogels with an embedded three-dimensionally interconnected channel network without the need of any additional processing step such as coating.
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Affiliation(s)
- Vincent Mair
- Department for Functional Materials in Medicine and Dentistry at the Institute of Functional Materials and Biofabrication, and Bavarian Polymer Institute, University of Würzburg, Pleicherwall 2, Würzburg, 97070, GERMANY
| | - Ilona Paulus
- Department for Functional Materials in Medicine and Dentistry at the Institute of Functional Materials and Biofabrication, and Bavarian Polymer Institute, University of Würzburg, Pleicherwall 2, Würzburg, 97070, GERMANY
| | - Juergen Groll
- Department for Functional Materials in Medicine and Dentistry at the Institute of Functional Materials and Biofabrication, and Bavarian Polymer Institute, University of Würzburg, Pleicherwall 2, Würzburg, 97070, GERMANY
| | - Matthias Ryma
- Department for Functional Materials in Medicine and Dentistry at the Institute of Functional Materials and Biofabrication, and Bavarian Polymer Institute, University of Würzburg, Pleicherwall 2, Würzburg, 97070, GERMANY
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15
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Xie Y, Chen J, Zhao H, Huang F. Prediction of the fiber diameter of melt electrospinning writing by kriging model. J Appl Polym Sci 2022. [DOI: 10.1002/app.52212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yu Xie
- School of Mechanical Engineering and Automation Fuzhou University Fuzhou China
| | - Jianxiong Chen
- School of Mechanical Engineering and Automation Fuzhou University Fuzhou China
| | - Han Zhao
- School of Mechanical Engineering and Automation Fuzhou University Fuzhou China
| | - Feng Huang
- School of Mechanical Engineering and Automation Fuzhou University Fuzhou China
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16
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Wang Y, Su Y, Zhang Y, Chen M. High-Voltage Wave Induced a Unique Structured Percolation Network with a Negative Gauge Factor. ACS APPLIED MATERIALS & INTERFACES 2022; 14:5661-5672. [PMID: 35050585 DOI: 10.1021/acsami.1c23741] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Nanocomposite percolation networks have attracted increasing attention in the field of wearable devices. Generally, the large junction resistance caused by the small contact area in the percolation network is considered as the bottleneck in preparing high-performance electronics. In such electronics, an applied strain will lead to deformation on the fiber junction, subsequently increasing the sheet resistance. However, taking advantage of the dominant role of the contact resistance in the percolation network, the overall resistance of the network can be controlled by skillfully adjusting the contact area. Here, we designed a combined gold-polycaprolactone (Au-PCL) network with a unique buckling net structure. When the thickness of the gold nanolayer is 50 nm, the network shows typical percolation behavior with high transparency (93%), good conductivity (20 Ω/sq), and good ductility. Moreover, the networks show a unique positive relationship between the conductivity and strain due to the variation of contact resistance. By designing different waving angles, the network can be used as a dynamic strain sensor with a tunable gauge factor ranging from -0.8 to -1.8. Overall, these highly stretchable and transparent Au-PCL networks show promising applications in the field of high-performance electronic and optoelectronic nanodevices.
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Affiliation(s)
- Yuting Wang
- Department of Physics, University of Science and Technology Beijing, Beijing 100083, China
- Department of Biological and Chemical Engineering, Aarhus University, 8000 Aarhus C, Denmark
| | - Yingchun Su
- Department of Biological and Chemical Engineering, Aarhus University, 8000 Aarhus C, Denmark
| | - Yanping Zhang
- Interdisciplinary Nanoscience Center, Aarhus University, 8000 Aarhus C, Denmark
| | - Menglin Chen
- Department of Biological and Chemical Engineering, Aarhus University, 8000 Aarhus C, Denmark
- Interdisciplinary Nanoscience Center, Aarhus University, 8000 Aarhus C, Denmark
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17
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Wubneh A, Ayranci C, Kim C. A Novel Theoretical Model Development and Simulation of Melt‐Electrospinning Using Kane's and Udwadia–Kalaba Methods. ADVANCED THEORY AND SIMULATIONS 2022. [DOI: 10.1002/adts.202100278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Abiy Wubneh
- Department of Mechanical Engineering University of Alberta Donadeo Innovation Centre for Engineering 9211‐116 St Edmonton AB T6G 2H5 Canada
| | - Cagri Ayranci
- Department of Mechanical Engineering University of Alberta Donadeo Innovation Centre for Engineering 9211‐116 St Edmonton AB T6G 2H5 Canada
| | - Chun‐IL Kim
- Department of Mechanical Engineering University of Alberta Donadeo Innovation Centre for Engineering 9211‐116 St Edmonton AB T6G 2H5 Canada
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18
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Böhm C, Stahlhut P, Weichhold J, Hrynevich A, Teßmar J, Dalton PD. The Multiweek Thermal Stability of Medical-Grade Poly(ε-caprolactone) During Melt Electrowriting. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2104193. [PMID: 34741411 DOI: 10.1002/smll.202104193] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/26/2021] [Indexed: 06/13/2023]
Abstract
Melt electrowriting (MEW) is a high-resolution additive manufacturing technology that places unique constraints on the processing of thermally degradable polymers. With a single nozzle, MEW operates at low throughput and in this study, medical-grade poly(ε-caprolactone) (PCL) is heated for 25 d at three different temperatures (75, 85, and 95 °C), collecting daily samples. There is an initial increase in the fiber diameter and decrease in the jet speed over the first 5 d, then the MEW process remains stable for the 75 and 85 °C groups. When the collector speed is fixed to a value at least 10% above the jet speed, the diameter remains constant for 25 d at 75 °C and only increases with time for 85 and 95 °C. Fiber fusion at increased layer height is observed for 85 and 95 °C, while the surface morphology of single fibers remain similar for all temperatures. The properties of the prints are assessed with no observable changes in the degree of crystallinity or the Young's modulus, while the yield strength decreases in later phases only for 95 °C. After the initial 5-d period, the MEW processing of PCL at 75 °C is extraordinarily stable with overall fiber diameters averaging 13.5 ± 1.0 µm over the entire 25-d period.
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Affiliation(s)
- Christoph Böhm
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Philipp Stahlhut
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Jan Weichhold
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Andrei Hrynevich
- Department of Veterinary Science, Utrecht University, Yalelaan 1, Utrecht, 3584 CL, Netherlands
- Department of Orthopedics, UMC Utrecht, Heidelberglaan 100, Utrecht, 3584 CX, Netherlands
| | - Jörg Teßmar
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Paul D Dalton
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
- Phil and Penny Knight Campus for Accelerating Scientific Impact, University of Oregon, 1505 Franklin Boulevard, Eugene, OR, 97403-6231, USA
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19
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Potential of Melt Electrowritten Scaffolds Seeded with Meniscus Cells and Mesenchymal Stromal Cells. Int J Mol Sci 2021; 22:ijms222011200. [PMID: 34681860 PMCID: PMC8538885 DOI: 10.3390/ijms222011200] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 10/06/2021] [Accepted: 10/13/2021] [Indexed: 12/13/2022] Open
Abstract
Meniscus injury and meniscectomy are strongly related to osteoarthritis, thus there is a clinical need for meniscus replacement. The purpose of this study is to create a meniscus scaffold with micro-scale circumferential and radial fibres suitable for a one-stage cell-based treatment. Poly-caprolactone-based scaffolds with three different architectures were made using melt electrowriting (MEW) technology and their in vitro performance was compared with scaffolds made using fused-deposition modelling (FDM) and with the clinically used Collagen Meniscus Implants® (CMI®). The scaffolds were seeded with meniscus and mesenchymal stromal cells (MSCs) in fibrin gel and cultured for 28 d. A basal level of proteoglycan production was demonstrated in MEW scaffolds, the CMI®, and fibrin gel control, yet within the FDM scaffolds less proteoglycan production was observed. Compressive properties were assessed under uniaxial confined compression after 1 and 28 d of culture. The MEW scaffolds showed a higher Young’s modulus when compared to the CMI® scaffolds and a higher yield point compared to FDM scaffolds. This study demonstrates the feasibility of creating a wedge-shaped meniscus scaffold with MEW using medical-grade materials and seeding the scaffold with a clinically-feasible cell number and -type for potential translation as a one-stage treatment.
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20
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Bakirci E, Frank A, Gumbel S, Otto PF, Fürsattel E, Tessmer I, Schmidt H, Dalton PD. Melt Electrowriting of Amphiphilic Physically Crosslinked Segmented Copolymers. MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202100259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Ezgi Bakirci
- Department for Functional Materials in Medicine and Dentistry and Bavarian Polymer (BPI) Institute University Würzburg Pleicherwall 2 Würzburg 97070 Germany
| | - Andreas Frank
- Macromolecular Chemistry and Bavarian Polymer Institute (BPI) University of Bayreuth Universitätsstraße 30 Bayreuth 95440 Germany
| | - Simon Gumbel
- Macromolecular Chemistry and Bavarian Polymer Institute (BPI) University of Bayreuth Universitätsstraße 30 Bayreuth 95440 Germany
| | - Paul F. Otto
- Department for Functional Materials in Medicine and Dentistry and Bavarian Polymer (BPI) Institute University Würzburg Pleicherwall 2 Würzburg 97070 Germany
| | - Eva Fürsattel
- Macromolecular Chemistry and Bavarian Polymer Institute (BPI) University of Bayreuth Universitätsstraße 30 Bayreuth 95440 Germany
| | - Ingrid Tessmer
- Rudolf‐Virchow Center for Integrative and Translational Bioimaging University of Würzburg Josef‐Schneider‐Straße 2 Würzburg 97080 Germany
| | - Hans‐Werner Schmidt
- Macromolecular Chemistry and Bavarian Polymer Institute (BPI) University of Bayreuth Universitätsstraße 30 Bayreuth 95440 Germany
| | - Paul D. Dalton
- Department for Functional Materials in Medicine and Dentistry and Bavarian Polymer (BPI) Institute University Würzburg Pleicherwall 2 Würzburg 97070 Germany
- Phil and Penny Knight Campus to Accelerate Scientific Impact University of Oregon 1505 Franklin Blvd Eugene OR 90403 USA
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21
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Blum C, Weichhold J, Hochleitner G, Stepanenko V, Würthner F, Groll J, Jungst T. Controlling Topography and Crystallinity of Melt Electrowritten Poly(ɛ-Caprolactone) Fibers. 3D PRINTING AND ADDITIVE MANUFACTURING 2021; 8:315-321. [PMID: 36654937 PMCID: PMC9828622 DOI: 10.1089/3dp.2020.0290] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Melt electrowriting (MEW) is an aspiring 3D printing technology with an unprecedented resolution among fiber-based printing technologies. It offers the ability to direct-write predefined designs utilizing a jet of molten polymer to fabricate constructs composed of fibers with diameters of only a few micrometers. These dimensions enable unique construct properties. Poly(ɛ-caprolactone) (PCL), a semicrystalline polymer mainly used for biomedical and life science applications, is the most prominent material for MEW and exhibits excellent printing properties. Despite the wealth of melt electrowritten constructs that have been fabricated by MEW, a detailed investigation, especially regarding fiber analysis on a macro- and microlevel is still lacking. Hence, this study systematically examines the influence of process parameters such as spinneret diameter, feeding pressure, and collector velocity on the diameter and particularly the topography of PCL fibers and sheds light on how these parameters affect the mechanical properties and crystallinity. A correlation between the mechanical properties, crystallite size, and roughness of the deposited fiber, depending on the collector velocity and applied feeding pressure, is revealed. These findings are used to print constructs composed of fibers with different microtopography without affecting the fiber diameter and thus the macroscopic assembly of the printed constructs.
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Affiliation(s)
- Carina Blum
- Department of Functional Materials in Medicine and Dentistry at the Institute of Functional Materials and Biofabrication (IFB) University of Würzburg and KeyLab Polymers for Medicine of the Bavarian Polymer Institute (BPI), Würzburg, Germany
| | - Jan Weichhold
- Department of Functional Materials in Medicine and Dentistry at the Institute of Functional Materials and Biofabrication (IFB) University of Würzburg and KeyLab Polymers for Medicine of the Bavarian Polymer Institute (BPI), Würzburg, Germany
| | - Gernot Hochleitner
- Department of Functional Materials in Medicine and Dentistry at the Institute of Functional Materials and Biofabrication (IFB) University of Würzburg and KeyLab Polymers for Medicine of the Bavarian Polymer Institute (BPI), Würzburg, Germany
| | | | - Frank Würthner
- Institut für Organische Chemie, Universität Würzburg, Würzburg, Germany
- Center for Nanosystems Chemistry (CNC) & Bavarian Polymer Institute, Universität Würzburg, Würzburg, Germany
| | - Jürgen Groll
- Department of Functional Materials in Medicine and Dentistry at the Institute of Functional Materials and Biofabrication (IFB) University of Würzburg and KeyLab Polymers for Medicine of the Bavarian Polymer Institute (BPI), Würzburg, Germany
| | - Tomasz Jungst
- Department of Functional Materials in Medicine and Dentistry at the Institute of Functional Materials and Biofabrication (IFB) University of Würzburg and KeyLab Polymers for Medicine of the Bavarian Polymer Institute (BPI), Würzburg, Germany
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22
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Mieszczanek P, Eggert S, Corke P, Hutmacher DW. Automated melt electrowritting platform with real-time process monitoring. HARDWAREX 2021; 10:e00246. [PMID: 35607669 PMCID: PMC9123438 DOI: 10.1016/j.ohx.2021.e00246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 10/29/2021] [Accepted: 11/04/2021] [Indexed: 06/15/2023]
Abstract
Melt electrowriting (MEW) is an additive manufacturing (AM) technology with the ability to fabricate complex designs with high-resolution. The utility of MEW is studied in many fields including tissue engineering and soft robotics. However, current MEW hardware offers only basic functionality and is often designed and built in-house. This affects results replication across different MEW devices and slows down the technological advancement. To address these issues, we present an automated MEW platform with real-time process parameter monitoring and control. We validate the developed platform by demonstrating the ability to accurately print polymer structures and successfully measure and adjust parameters during the printing process. The platform enables the collection of large volumes of data that can be subsequently used for further analysis of the system. Ultimately, the concept will help MEW to become more accessible for both research laboratories and industry and allow advancing the technology by leveraging the process monitoring, control and data collection.
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Affiliation(s)
- Pawel Mieszczanek
- Centre in Transformative Biomimetics in Bioengineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
- School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Sebastian Eggert
- Department of Mechanical Engineering, Technical University of Munich, Garching 85748, Germany
| | - Peter Corke
- QUT Centre for Robotics, Queensland University of Technology, Brisbane, QLD 4000, Australia
- School of Electrical Engineering and Robotics, Faculty of Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Dietmar W. Hutmacher
- Centre in Transformative Biomimetics in Bioengineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
- School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
- ARC ITTC in Additive Biomanufacturing, Queensland University of Technology, Brisbane, QLD 4000, Australia
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23
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Wu Y. Electrohydrodynamic jet 3D printing in biomedical applications. Acta Biomater 2021; 128:21-41. [PMID: 33905945 DOI: 10.1016/j.actbio.2021.04.036] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 03/31/2021] [Accepted: 04/16/2021] [Indexed: 12/21/2022]
Abstract
Electrohydrodynamic Jet 3D Printing (e-jetting) is a promising technique developed from electrospinning, which enables precise fiber deposition in a layer-by-layer fashion with customized designs. Several studies have verified that e-jetted scaffolds were able to support cell attachment, proliferation, and extracellular matrix formation, as well as cell infiltration into the scaffold due to the well-defined pores. Besides, e-jetting has also been combined with other techniques to incorporate biomaterials (e.g., hydrogels and cell spheroids) that could not be e-jetted, to promote the biological performance of the scaffold. In the recent decade, applying e-jetting in the fabrication of tissue-engineered scaffolds has drawn a lot of interest. Moreover, efforts have been put to develop varied scaffolds for some specific biomedical applications such as cartilage, tendon, and blood vessel, which exhibited superior mechanical properties and promoted cell behaviors including cellular alignment and differentiation. This review article also provides the reader with some crucial considerations and major limitations of e-jetting, such as scaffold design, printability of large-scale constructs, applicable biomaterials, and cell behaviors. Overall, this review article expounds on perspectives in the context of development and biomedical applications of this technique. STATEMENT OF SIGNIFICANCE: E-jetting technique is able to produce fibers with diameter in micrometer scale, which has been considered as a promising 3D printing technique. This technique has shown promise for regeneration of tissue engineered scaffolds with well-defined structures, which has been reported to apply in regeneration of different tissue types. The superior controllability of the process endows the feasibility of constructing multi-scale scaffolds with great biological mimicry and cellular infiltration. The incorporation of other biomaterials into the e-jetted networks further reinforces the scope of applications as compared to e-jetted scaffolds only. There is no doubt that e-jetting will be a great tool for tissue engineered scaffolding, and this review article will give overall perspectives in this topic.
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24
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Mieszczanek P, Robinson TM, Dalton PD, Hutmacher DW. Convergence of Machine Vision and Melt Electrowriting. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2100519. [PMID: 34101929 DOI: 10.1002/adma.202100519] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 04/16/2021] [Indexed: 06/12/2023]
Abstract
Melt electrowriting (MEW) is a high-resolution additive manufacturing technology that balances multiple parametric variables to arrive at a stable fabrication process. The better understanding of this balance is underscored here using high-resolution camera vision of jet stability profiles in different electrical fields. Complementing this visual information are fiber-diameter measurements obtained at precise points, allowing the correlation to electrified jet properties. Two process signatures-the jet angle and for the first time, the Taylor cone area-are monitored and analyzed with a machine vision system, while SEM imaging for diameter measurement correlates real-time information. This information, in turn, allows the detection and correction of fiber pulsing for accurate jet placement on the collector, and the in-process assessment of the fiber diameter. Improved process control is used to successfully fabricate collapsible MEW tubes; structures that require exceptional accuracy and printing stability. Using a precise winding angle of 60° and 300 layers, the resulting 12 mm-thick tubular structures have elastic snap-through instabilities associated with mechanical metamaterials. This study provides a detailed analysis of the fiber pulsing occurrence in MEW and highlights the importance of real-time monitoring of the Taylor cone volume to better understand, control, and predict printing instabilities.
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Affiliation(s)
- Pawel Mieszczanek
- Institute of Health and Biomedical Innovation, Queensland University of Technology, 60 Musk Avenue, Kelvin Grove, 4059, Australia
| | - Thomas M Robinson
- Institute of Health and Biomedical Innovation, Queensland University of Technology, 60 Musk Avenue, Kelvin Grove, 4059, Australia
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, Julius-Maximilians University of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Paul D Dalton
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, Julius-Maximilians University of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
- Phil and Penny Knight Campus for Accelerating Scientific Impact, University of Oregon, 1505 Franklin Boulevard, Eugene, OR, 97403-6231, USA
| | - Dietmar W Hutmacher
- Institute of Health and Biomedical Innovation, Queensland University of Technology, 60 Musk Avenue, Kelvin Grove, 4059, Australia
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25
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Hrynevich A, Achenbach P, Jungst T, Brook GA, Dalton PD. Design of Suspended Melt Electrowritten Fiber Arrays for Schwann Cell Migration and Neurite Outgrowth. Macromol Biosci 2021; 21:e2000439. [PMID: 33951291 DOI: 10.1002/mabi.202000439] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Indexed: 01/21/2023]
Abstract
In this study, well-defined, 3D arrays of air-suspended melt electrowritten fibers are made from medical grade poly(ɛ-caprolactone) (PCL). Low processing temperatures, lower voltages, lower ambient temperature, increased collector distance, and high collector speeds all aid to direct-write suspended fibers that can span gaps of several millimeters between support structures. Such processing parameters are quantitatively determined using a "wedge-design" melt electrowritten test frame to identify the conditions that increase the suspension probability of long-distance fibers. All the measured parameters impact the probability that a fiber is suspended over multimillimeter distances. The height of the suspended fibers can be controlled by a concurrently fabricated fiber wall and the 3D suspended PCL fiber arrays investigated with early post-natal mouse dorsal root ganglion explants. The resulting Schwann cell and neurite outgrowth extends substantial distances by 21 d, following the orientation of the suspended fibers and the supporting walls, often generating circular whorls of high density Schwann cells between the suspended fibers. This research provides a design perspective and the fundamental parametric basis for suspending individual melt electrowritten fibers into a form that facilitates cell culture.
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Affiliation(s)
- Andrei Hrynevich
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, Julius Maximilians University of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany.,Department of Veterinary Science, Utrecht University, Yalelaan 1, Utrecht, 3584 CL, Netherlands.,Department of Orthopedics, UMC Utrecht, Heidelberglaan 100, Utrecht, 3584 CX, Netherlands
| | - Pascal Achenbach
- Institute of Neuropathology, RWTH Aachen University Hospital, Pauwelsstrasse 30, Aachen, 52074, Germany
| | - Tomasz Jungst
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, Julius Maximilians University of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany
| | - Gary A Brook
- Institute of Neuropathology, RWTH Aachen University Hospital, Pauwelsstrasse 30, Aachen, 52074, Germany
| | - Paul D Dalton
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, Julius Maximilians University of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany.,Phil and Penny Knight Campus for Accelerating Scientific Impact, University of Oregon, 1505 Franklin Boulevard, Eugene, 97403-6231, USA
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26
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Lakshmi Narayana P, Wang X, Yeom J, Maurya AK, Bang W, Srikanth O, Harinatha Reddy M, Hong J, Subba Reddy NG. Correlating the 3D melt electrospun polycaprolactone fiber diameter and process parameters using neural networks. J Appl Polym Sci 2021. [DOI: 10.1002/app.50956] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Pasupuleti Lakshmi Narayana
- Advanced Metals Division, Titanium Department Korea Institute of Materials Science Changwon Republic of Korea
- Virtual Materials Lab, School of Materials Science and Engineering, Engineering Research Institute Gyeongsang National University Jinju Republic of Korea
| | - Xiao‐Song Wang
- Advanced Metals Division, Titanium Department Korea Institute of Materials Science Changwon Republic of Korea
| | - Jong‐Taek Yeom
- Advanced Metals Division, Titanium Department Korea Institute of Materials Science Changwon Republic of Korea
| | - Anoop Kumar Maurya
- Advanced Metals Division, Titanium Department Korea Institute of Materials Science Changwon Republic of Korea
- Virtual Materials Lab, School of Materials Science and Engineering, Engineering Research Institute Gyeongsang National University Jinju Republic of Korea
| | - Won‐Seok Bang
- Business Department Gyeongsang National University Jinju Republic of Korea
| | - Ommi Srikanth
- Department of Mechanical Engineering Dhanekula Institute of Engineering & Technology Vijayawada India
| | | | - Jae‐Keun Hong
- Advanced Metals Division, Titanium Department Korea Institute of Materials Science Changwon Republic of Korea
| | - Nagireddy Gari Subba Reddy
- Virtual Materials Lab, School of Materials Science and Engineering, Engineering Research Institute Gyeongsang National University Jinju Republic of Korea
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27
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King WE, Bowlin GL. Near-Field Electrospinning and Melt Electrowriting of Biomedical Polymers-Progress and Limitations. Polymers (Basel) 2021; 13:1097. [PMID: 33808288 PMCID: PMC8037214 DOI: 10.3390/polym13071097] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 03/25/2021] [Accepted: 03/27/2021] [Indexed: 12/18/2022] Open
Abstract
Near-field electrospinning (NFES) and melt electrowriting (MEW) are the process of extruding a fiber due to the force exerted by an electric field and collecting the fiber before bending instabilities occur. When paired with precise relative motion between the polymer source and the collector, a fiber can be directly written as dictated by preprogrammed geometry. As a result, this precise fiber control results in another dimension of scaffold tailorability for biomedical applications. In this review, biomedically relevant polymers that to date have manufactured fibers by NFES/MEW are explored and the present limitations in direct fiber writing of standardization in published setup details, fiber write throughput, and increased ease in the creation of complex scaffold geometries are discussed.
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Affiliation(s)
- William E. King
- Department of Biomedical Engineering, University of Memphis, Memphis, TN 38152, USA;
- Department of Biomedical Engineering, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Gary L. Bowlin
- Department of Biomedical Engineering, University of Memphis, Memphis, TN 38152, USA;
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28
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Constante G, Apsite I, Alkhamis H, Dulle M, Schwarzer M, Caspari A, Synytska A, Salehi S, Ionov L. 4D Biofabrication Using a Combination of 3D Printing and Melt-Electrowriting of Shape-Morphing Polymers. ACS APPLIED MATERIALS & INTERFACES 2021; 13:12767-12776. [PMID: 33389997 DOI: 10.1021/acsami.0c18608] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We report the fabrication of scroll-like scaffolds with anisotropic topography using 4D printing based on a combination of 3D extrusion printing of methacrylated alginate, melt-electrowriting of polycaprolactone fibers, and shape-morphing of the fabricated object. A combination of 3D extrusion printing and melt-electrowriting allows programmed deposition of different materials and fabrication of structures with high resolution. Shape-morphing allows the transformation of a patterned surface of a printed structure in a pattern on inner surface of a folded object that is used to align cells. We demonstrate that the concentration of calcium ions, the environment media, and the geometrical shape of the scaffold influences shape-morphing that allows it to be efficiently programmed. Myoblasts cultured inside a scrolled bilayer scaffold demonstrate excellent viability and proliferation. Moreover, the patterned surface generated by PCL fibers allow a very high degree of orientation of cells, which cannot be achieved on the alginate layer without fibers.
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Affiliation(s)
- Gissela Constante
- Faculty of Engineering Sciences, University of Bayreuth, Ludwig Thoma Strasse 36A, Bayreuth 95447, Germany
| | - Indra Apsite
- Faculty of Engineering Sciences, University of Bayreuth, Ludwig Thoma Strasse 36A, Bayreuth 95447, Germany
| | - Hanin Alkhamis
- Faculty of Engineering Sciences, University of Bayreuth, Ludwig Thoma Strasse 36A, Bayreuth 95447, Germany
| | - Martin Dulle
- Forschungszentrum Jülich GmbH Jülich Centre for Neutron Science (JCNS-1) and Institute for Complex Systems (ICS-1), Jülich 52425, Germany
| | - Madeleine Schwarzer
- Leibniz Institute of Polymer Research Dresden e. V., Hohe Straße 6, Dresden 01069, Germany
| | - Anja Caspari
- Leibniz Institute of Polymer Research Dresden e. V., Hohe Straße 6, Dresden 01069, Germany
| | - Alla Synytska
- Leibniz Institute of Polymer Research Dresden e. V., Hohe Straße 6, Dresden 01069, Germany
- Faculty of Mathematics and Science, Institute of Physical Chemistry and Polymer Physics, Dresden University of Technology, Dresden 01062, Germany
| | - Sahar Salehi
- Department of Biomaterials, University of Bayreuth, Prof.-Rüdiger-Bormann Strasse 1, Bayreuth 95447, Germany
| | - Leonid Ionov
- Faculty of Engineering Sciences and Bavarian Polymer Institute, University of Bayreuth, Bayreuth 95447, Germany
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29
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Ruihan X, Weijie B, Zhihai W, Yaohong W. Start-up stage with improved resolution for an electric field-assisted fused deposition. RSC Adv 2021; 11:7397-7404. [PMID: 35423235 PMCID: PMC8694952 DOI: 10.1039/d0ra07795j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 01/29/2021] [Indexed: 11/29/2022] Open
Abstract
Electric field-assisted fused deposition modeling (E-FDM) is a promising technique in the field of 3D printing. This paper studies the start-up stage of the printing, which is a process of liquid gradually deforming and making an initial contact with the substrate under the action of electric stress. Polycaprolactone, a popular material for biomedicine, is selected as the printing material. With a home-built E-FDM system, the nozzle-to-substrate distance and the nozzle and substrate temperatures are all held steady. With a photography system, the process of meniscus deformation is recorded. And by image processing methods, the meniscus length and the volume of liquid at the nozzle can be obtained. At a set of initial liquid volumes (V i), nozzle voltage is ramped to a fixed value at a fixed rate. The effects of V i on the meniscus deformation during the start-up stage of the printing are examined. For sufficiently small V i, the meniscus deforms into a conical (Taylor cone) shape, and a fine jet with a diameter much smaller than the nozzle diameter appears. For sufficiently large V i, the meniscus exhibits a spindle shape when it touches the substrate. At an intermediate V i, a Taylor cone is formed, tending to eject a fine jet. After a short period of stagnation or even a slight retraction, no liquid is emitted. Through this study, it is suggested that for high-resolution printing, ramping the voltage at small V i may be preferable. This proposition is preliminarily confirmed in a direct writing test.
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Affiliation(s)
- Xu Ruihan
- Faculty of Information, Beijing University of Technology Beijing 100124 China
- Key Laboratory of Optoelectronics Technology, Beijing University of Technology Beijing 100124 China
| | - Bao Weijie
- Faculty of Information, Beijing University of Technology Beijing 100124 China
- Key Laboratory of Optoelectronics Technology, Beijing University of Technology Beijing 100124 China
| | - Wang Zhihai
- Faculty of Information, Beijing University of Technology Beijing 100124 China
- Key Laboratory of Optoelectronics Technology, Beijing University of Technology Beijing 100124 China
| | - Wang Yaohong
- Center for Applied Mathematics, Tianjin University Tianjin 300072 China
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30
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Castilho M, Levato R, Bernal PN, de Ruijter M, Sheng CY, van Duijn J, Piluso S, Ito K, Malda J. Hydrogel-Based Bioinks for Cell Electrowriting of Well-Organized Living Structures with Micrometer-Scale Resolution. Biomacromolecules 2021; 22:855-866. [PMID: 33412840 PMCID: PMC7880563 DOI: 10.1021/acs.biomac.0c01577] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Bioprinting has become an important tool for fabricating regenerative implants and in vitro cell culture platforms. However, until today, extrusion-based bioprinting processes are limited to resolutions of hundreds of micrometers, which hamper the reproduction of intrinsic functions and morphologies of living tissues. This study describes novel hydrogel-based bioinks for cell electrowriting (CEW) of well-organized cell-laden fiber structures with diameters ranging from 5 to 40 μm. Two novel photoresponsive hydrogel bioinks, that is, based on gelatin and silk fibroin, which display distinctly different gelation chemistries, are introduced. The rapid photomediated cross-linking mechanisms, electrical conductivity, and viscosity of these two engineered bioinks allow the fabrication of 3D ordered fiber constructs with small pores (down to 100 μm) with different geometries (e.g., squares, hexagons, and curved patterns) of relevant thicknesses (up to 200 μm). Importantly, the biocompatibility of the gelatin- and silk fibroin-based bioinks enables the fabrication of cell-laden constructs, while maintaining high cell viability post printing. Taken together, CEW and the two hydrogel bioinks open up fascinating opportunities to manufacture microstructured constructs for applications in regenerative medicine and in vitro models that can better resemble cellular microenvironments.
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Affiliation(s)
- Miguel Castilho
- Department of Orthopedics, University Medical Center Utrecht, Utrecht University, 3508 GA Utrecht, The Netherlands.,Department of Biomedical Engineering, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands
| | - Riccardo Levato
- Department of Orthopedics, University Medical Center Utrecht, Utrecht University, 3508 GA Utrecht, The Netherlands.,Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, 3508 GA Utrecht, The Netherlands
| | - Paulina Nunez Bernal
- Department of Orthopedics, University Medical Center Utrecht, Utrecht University, 3508 GA Utrecht, The Netherlands
| | - Mylène de Ruijter
- Department of Orthopedics, University Medical Center Utrecht, Utrecht University, 3508 GA Utrecht, The Netherlands
| | - Christina Y Sheng
- Department of Orthopedics, University Medical Center Utrecht, Utrecht University, 3508 GA Utrecht, The Netherlands
| | - Joost van Duijn
- Department of Orthopedics, University Medical Center Utrecht, Utrecht University, 3508 GA Utrecht, The Netherlands
| | - Susanna Piluso
- Department of Orthopedics, University Medical Center Utrecht, Utrecht University, 3508 GA Utrecht, The Netherlands.,Department of Developmental BioEngineering, Technical Medical Centre, University of Twente, 7522 NB Enschede, The Netherlands
| | - Keita Ito
- Department of Orthopedics, University Medical Center Utrecht, Utrecht University, 3508 GA Utrecht, The Netherlands.,Department of Biomedical Engineering, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands
| | - Jos Malda
- Department of Orthopedics, University Medical Center Utrecht, Utrecht University, 3508 GA Utrecht, The Netherlands.,Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, 3508 GA Utrecht, The Netherlands
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31
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Bolle ECL, Nicdao D, Dalton PD, Dargaville TR. Production of Scaffolds Using Melt Electrospinning Writing and Cell Seeding. Methods Mol Biol 2021; 2147:111-124. [PMID: 32840814 DOI: 10.1007/978-1-0716-0611-7_9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Melt electrospinning writing (MEW) is a solvent-free fabrication method for making polymer fiber scaffolds with features which include large surface area, high porosity, and controlled deposition of the fibers. These scaffolds are ideal for tissue engineering applications. Here we describe how to produce scaffolds made from poly(ε-caprolactone) using MEW and the seeding of primary human-derived dermal fibroblasts to create cell-scaffold constructs. The same methodology could be used with any number of cell types and MEW scaffold designs.
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Affiliation(s)
- Eleonore C L Bolle
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, Australia
| | - Deanna Nicdao
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, Australia
| | - Paul D Dalton
- Department for Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University of Würzburg, Würzburg, Germany.
| | - Tim R Dargaville
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, Australia.
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32
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Kade JC, Dalton PD. Polymers for Melt Electrowriting. Adv Healthc Mater 2021; 10:e2001232. [PMID: 32940962 DOI: 10.1002/adhm.202001232] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 08/27/2020] [Indexed: 12/13/2022]
Abstract
Melt electrowriting (MEW) is an emerging high-resolution additive manufacturing technique based on the electrohydrodynamic processing of polymers. MEW is predominantly used to fabricate scaffolds for biomedical applications, where the microscale fiber positioning has substantial implications in its macroscopic mechanical properties. This review gives an update on the increasing number of polymers processed via MEW and different commercial sources of the gold standard poly(ε-caprolactone) (PCL). A description of MEW-processed polymers beyond PCL is introduced, including blends and coated fibers to provide specific advantages in biomedical applications. Furthermore, a perspective on printer designs and developments is highlighted, to keep expanding the variety of processable polymers for MEW.
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Affiliation(s)
- Juliane C. Kade
- Department of Functional Materials in Medicine and Dentistry Bavarian Polymer Institute University Clinic Würzburg Pleicherwall 2 97070 Würzburg Germany
| | - Paul D. Dalton
- Department of Functional Materials in Medicine and Dentistry Bavarian Polymer Institute University Clinic Würzburg Pleicherwall 2 97070 Würzburg Germany
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Mechau J, Frank A, Bakirci E, Gumbel S, Jungst T, Giesa R, Groll J, Dalton PD, Schmidt H. Hydrophilic (AB)
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Segmented Copolymers for Melt Extrusion‐Based Additive Manufacturing. MACROMOL CHEM PHYS 2020. [DOI: 10.1002/macp.202000265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jannik Mechau
- Macromolecular Chemistry and Bavarian Polymer Institute (BPI) University of Bayreuth Universitätsstraße 30 Bayreuth 95440 Germany
| | - Andreas Frank
- Macromolecular Chemistry and Bavarian Polymer Institute (BPI) University of Bayreuth Universitätsstraße 30 Bayreuth 95440 Germany
| | - Ezgi Bakirci
- Department for Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute (BPI) University Würzburg Pleicherwall 2 Würzburg 97070 Germany
| | - Simon Gumbel
- Macromolecular Chemistry and Bavarian Polymer Institute (BPI) University of Bayreuth Universitätsstraße 30 Bayreuth 95440 Germany
| | - Tomasz Jungst
- Department for Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute (BPI) University Würzburg Pleicherwall 2 Würzburg 97070 Germany
| | - Reiner Giesa
- Macromolecular Chemistry and Bavarian Polymer Institute (BPI) University of Bayreuth Universitätsstraße 30 Bayreuth 95440 Germany
| | - Jürgen Groll
- Department for Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute (BPI) University Würzburg Pleicherwall 2 Würzburg 97070 Germany
| | - Paul D. Dalton
- Department for Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute (BPI) University Würzburg Pleicherwall 2 Würzburg 97070 Germany
| | - Hans‐Werner Schmidt
- Macromolecular Chemistry and Bavarian Polymer Institute (BPI) University of Bayreuth Universitätsstraße 30 Bayreuth 95440 Germany
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A Charge-Based Mechanistic Study into the Effects of Process Parameters on Fiber Accumulating Geometry for a Melt Electrohydrodynamic Process. Processes (Basel) 2020. [DOI: 10.3390/pr8111440] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Melt electrohydrodynamic processes, in conjunction with a moveable collector, have promising engineered tissue applications. However, the residual charges within the fibers deteriorate its printing fidelity. To clarify the mechanism through which the residual charges play roles and exclude the confounding effects of collector movement, a stationary printing mode is adopted in which fibers deposit on a stationary collector. Effects of process parameters on generalizable printing outcomes are studied herein. The fiber deposit bears a unique shape signature typified by a central cone surrounded by an outer ring and is characterized by a ratio of its height and base diameter Hdep/Ddep. Results indicate Hdep/Ddep increases with collector temperature and decreases slightly with voltage. Moreover, the steady-state dynamic jet deposition process is recorded and analyzed at different collector temperatures. A charge-based polarization mechanism describing the effect of collector temperature on the fiber accumulating shape is apparent in both initial and steady-state phases of fiber deposition. Therefore, a key outcome of this study is the identification and mechanistic understanding of collector temperature as a tunable process variable that can yield predictable structural outcomes. This may have cross-cutting potential for additive manufacturing process applications such as the melt electrowriting of layered scaffolds.
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Großhaus C, Bakirci E, Berthel M, Hrynevich A, Kade JC, Hochleitner G, Groll J, Dalton PD. Melt Electrospinning of Nanofibers from Medical-Grade Poly(ε-Caprolactone) with a Modified Nozzle. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2003471. [PMID: 33048431 DOI: 10.1002/smll.202003471] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 08/31/2020] [Indexed: 06/11/2023]
Abstract
Melt electrospun fibers, in general, have larger diameters than normally achieved with solution electrospinning. This study uses a modified nozzle to direct-write melt electrospun medical-grade poly(ε-caprolactone) onto a collector resulting in fibers with the smallest average diameter being 275 ± 86 nm under certain processing conditions. Within a flat-tipped nozzle is a small acupuncture needle positioned so that reduces the flow rate to ≈0.1 µL h-1 and has the sharp tip protruding beyond the nozzle, into the Taylor cone. The investigations indicate that 1-mm needle protrusion coupled with a heating temperature of 120 °C produce the most consistent, small diameter nanofibers. Using different protrusion distances for the acupuncture needle results in an unstable jet that deposited poor quality fibers that, in turn, affects the next adjacent path. The material quality is notably affected by the direct-writing speed, which became unstable above 10 mm min-1 . Coupled with a dual head printer, first melt electrospinning, then melt electrowriting could be performed in a single, automated process for the first time. Overall, the approach used here resulted in some of the smallest melt electrospun fibers reported to date and the smallest diameter fibers from a medical-grade degradable polymer using a melt processing technology.
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Affiliation(s)
- Chiara Großhaus
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany
| | - Ezgi Bakirci
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany
| | - Marius Berthel
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany
| | - Andrei Hrynevich
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany
| | - Juliane C Kade
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany
| | - Gernot Hochleitner
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany
| | - Jürgen Groll
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany
| | - Paul D Dalton
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany
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36
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Suresh S, Becker A, Glasmacher B. Impact of Apparatus Orientation and Gravity in Electrospinning-A Review of Empirical Evidence. Polymers (Basel) 2020; 12:polym12112448. [PMID: 33105879 PMCID: PMC7690589 DOI: 10.3390/polym12112448] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 10/19/2020] [Accepted: 10/20/2020] [Indexed: 12/29/2022] Open
Abstract
Electrospinning is a versatile fibre fabrication method with applications from textile to tissue engineering. Despite the appearance that the influencing parameters of electrospinning are fully understood, the effect of setup orientation has not been thoroughly investigated. With current burgeoning interest in modified and specialised electrospinning apparatus, it is timely to review the impact of this seldom-considered parameter. Apparatus configuration plays a major role in the morphology of the final product. The primary difference between spinning setups is the degree to which the electrical force and gravitational force contribute. Since gravity is much lower in magnitude when compared with the electrostatic force, it is thought to have no significant effect on the spinning process. But the shape of the Taylor cone, jet trajectory, fibre diameter, fibre diameter distribution, and overall spinning efficiency are all influenced by it. In this review paper, we discuss all these developments and more. Furthermore, because many research groups build their own electrospinning apparatus, it would be prudent to consider this aspect as particular orientations are more suitable for certain applications.
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Affiliation(s)
- Sinduja Suresh
- Institute for Multiphase Processes (IMP), Leibniz University Hannover, 30823 Garbsen, Hannover, Germany;
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), 30625 Hannover, Germany
- Hannover Medical School (MHH), 30625 Hannover, Germany
- Correspondence: (S.S.); (A.B.)
| | - Alexander Becker
- Institute for Multiphase Processes (IMP), Leibniz University Hannover, 30823 Garbsen, Hannover, Germany;
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), 30625 Hannover, Germany
- Correspondence: (S.S.); (A.B.)
| | - Birgit Glasmacher
- Institute for Multiphase Processes (IMP), Leibniz University Hannover, 30823 Garbsen, Hannover, Germany;
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), 30625 Hannover, Germany
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37
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Peiffer QC, de Ruijter M, van Duijn J, Crottet D, Dominic E, Malda J, Castilho M. Melt electrowriting onto anatomically relevant biodegradable substrates: Resurfacing a diarthrodial joint. MATERIALS & DESIGN 2020; 195:109025. [PMID: 33088011 PMCID: PMC7116215 DOI: 10.1016/j.matdes.2020.109025] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Three-dimensional printed hydrogel constructs with well-organized melt electrowritten (MEW) fibrereinforcing scaffolds have been demonstrated as a promising regenerative approach to treat small cartilage defects. Here, we investige how to translate the fabrication of small fibre-reinforced structures on flat surfaces to anatomically relevant structures. In particular, the accurate deposition of MEW-fibres onto curved surfaces of conductive and non-conductive regenerative biomaterials is studied. This study reveals that clinically relevant materials with low conductivities are compatible with resurfacing with organized MEW fibres. Importantly, accurate patterning on non-flat surfaces was successfully shown, provided that a constant electrical field strength and an electrical force normal to the substrate material is maintained. Furthermore, the application of resurfacing the geometry of the medial human femoral condyle is confirmed by the fabrication of a personalised osteochondral implant. The implant composed of an articular cartilage-resident chondroprogenitor cells (ACPCs)-laden hydrogel reinforced with a well-organized MEW scaffold retained its personalised shape, improved its compressive properties and supported neocartilage formation after 28 days in vitro culture. Overall, this study establishes the groundwork for translatingMEWfrom planar and non-resorbable material substrates to anatomically relevant geometries and regenerative materials that the regenerative medicine field aims to create.
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Affiliation(s)
- Quentin C. Peiffer
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht University, GA, Utrecht, the Netherlands
- Regenerative Medicine Center Utrecht, Utrecht, the Netherlands
| | - Mylène de Ruijter
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht University, GA, Utrecht, the Netherlands
- Regenerative Medicine Center Utrecht, Utrecht, the Netherlands
| | - Joost van Duijn
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht University, GA, Utrecht, the Netherlands
- Regenerative Medicine Center Utrecht, Utrecht, the Netherlands
| | | | | | - Jos Malda
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht University, GA, Utrecht, the Netherlands
- Regenerative Medicine Center Utrecht, Utrecht, the Netherlands
- Department of Clinical Sciences, Faculty of Veterinary Sciences, Utrecht University, Utrecht, the Netherlands
| | - Miguel Castilho
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht University, GA, Utrecht, the Netherlands
- Regenerative Medicine Center Utrecht, Utrecht, the Netherlands
- Orthopaedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands
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38
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Bakirci E, Schaefer N, Dahri O, Hrynevich A, Strissel P, Strick R, Dalton PD, Villmann C. Melt Electrowritten In Vitro Radial Device to Study Cell Growth and Migration. ACTA ACUST UNITED AC 2020; 4:e2000077. [PMID: 32875734 DOI: 10.1002/adbi.202000077] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 07/24/2020] [Indexed: 12/14/2022]
Abstract
The development of in vitro assays for 3D microenvironments is essential for understanding cell migration processes. A 3D-printed in vitro competitive radial device is developed to identify preferred Matrigel concentration for glioblastoma migration. Melt electrowriting (MEW) is used to fabricate the structural device with defined and intricate radial structures that are filled with Matrigel. Controlling the printing path is necessary to account for the distance lag in the molten jet, the applied electric field, and the continuous direct-writing nature of MEW. Circular printing below a diameter threshold results in substantial inward tilting of the MEW fiber wall. An eight-chamber radial device with a diameter of 9.4 mm is printed. Four different concentrations of Matrigel are dispensed into the radial chambers. Glioblastoma cells are seeded into the center and grow into all chambers within 8 days. The cell spreading area demonstrates that 6 and 8 mg mL-1 of Matrigel are preferred over 2 and 4 mg mL-1 . Furthermore, topographical cues via the MEW fiber wall are observed to promote migration even further away from the cell seeding depot. Previous studies implement MEW to fabricate cell invasive scaffolds whereas here it is applied to 3D-print in vitro tools to study cell migration.
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Affiliation(s)
- Ezgi Bakirci
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany
| | - Natascha Schaefer
- Department of Clinical Neurobiology, University Hospital of Würzburg, Versbacherstr. 5, Würzburg, 97078, Germany
| | - Ouafa Dahri
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany
| | - Andrei Hrynevich
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany
| | - Pamela Strissel
- Department of Gynecology and Obstetrics, Laboratory for Molecular Medicine, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nürnberg, University Str. 21-23, Erlangen, 91054, Germany
| | - Reiner Strick
- Department of Gynecology and Obstetrics, Laboratory for Molecular Medicine, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nürnberg, University Str. 21-23, Erlangen, 91054, Germany
| | - Paul D Dalton
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany
| | - Carmen Villmann
- Department of Clinical Neurobiology, University Hospital of Würzburg, Versbacherstr. 5, Würzburg, 97078, Germany
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39
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Zhang Z, Jørgensen ML, Wang Z, Amagat J, Wang Y, Li Q, Dong M, Chen M. 3D anisotropic photocatalytic architectures as bioactive nerve guidance conduits for peripheral neural regeneration. Biomaterials 2020; 253:120108. [DOI: 10.1016/j.biomaterials.2020.120108] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 04/28/2020] [Accepted: 05/07/2020] [Indexed: 12/12/2022]
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Liashenko I, Hrynevich A, Dalton PD. Designing Outside the Box: Unlocking the Geometric Freedom of Melt Electrowriting using Microscale Layer Shifting. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2001874. [PMID: 32459023 DOI: 10.1002/adma.202001874] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 04/17/2020] [Accepted: 04/24/2020] [Indexed: 06/11/2023]
Abstract
Melt electrowriting, a high-resolution additive manufacturing technology, has so far been developed with vertical stacking of fiber layers, with a printing trajectory that is constant for each layer. In this work, microscale layer shifting is introduced through deliberately offsetting the printing trajectory for each printed layer. Inaccuracies during the printing of sinusoidal walls are corrected via layer shifting, resulting in accurate control of their geometry and mechanical properties. Furthermore, more substantial layer shifting allows stacking of fiber layers in a horizontal manner, overcoming the electrostatic autofocusing effect that favors vertical layer stacking. Novel nonlinear geometries, such as overhangs, wall texturing and branching, and smooth and abrupt changes in printing trajectory are presented, demonstrating the flexibility of the layer shifting approach beyond the state-of-the-art. The practice of microscale layer shifting for melt electrowriting enables more complex geometries that promise to have a profound impact on the development of products in a broad range of applications.
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Affiliation(s)
- Ievgenii Liashenko
- Department of Chemical Engineering, Universitat Rovira i Virgili, Av. dels Països Catalans 26, Tarragona, 43007, Spain
- Catalonia Institute for Energy Research - IREC, Sant Adrià de Besòs 1, Pl 2, Barcelona, 08930, Spain
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany
| | - Andrei Hrynevich
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany
| | - Paul D Dalton
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany
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41
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Paxton NC, Lanaro M, Bo A, Crooks N, Ross MT, Green N, Tetsworth K, Allenby MC, Gu Y, Wong CS, Powell SK, Woodruff MA. Design tools for patient specific and highly controlled melt electrowritten scaffolds. J Mech Behav Biomed Mater 2020; 105:103695. [DOI: 10.1016/j.jmbbm.2020.103695] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 01/16/2020] [Accepted: 02/10/2020] [Indexed: 11/30/2022]
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42
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Tylek T, Blum C, Hrynevich A, Schlegelmilch K, Schilling T, Dalton PD, Groll J. Precisely defined fiber scaffolds with 40 μm porosity induce elongation driven M2-like polarization of human macrophages. Biofabrication 2020; 12:025007. [DOI: 10.1088/1758-5090/ab5f4e] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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43
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Kristen M, Ainsworth MJ. Fiber Scaffold Patterning for Mending Hearts: 3D Organization Bringing the Next Step. Adv Healthc Mater 2020; 9:e1900775. [PMID: 31603288 PMCID: PMC7116178 DOI: 10.1002/adhm.201900775] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 09/14/2019] [Indexed: 12/14/2022]
Abstract
Heart failure (HF) is a leading cause of death worldwide. The most common conditions that lead to HF are coronary artery disease, myocardial infarction, valve disorders, high blood pressure, and cardiomyopathy. Due to the limited regenerative capacity of the heart, the only curative therapy currently available is heart transplantation. Therefore, there is a great need for the development of novel regenerative strategies to repair the injured myocardium, replace damaged valves, and treat occluded coronary arteries. Recent advances in manufacturing technologies have resulted in the precise fabrication of 3D fiber scaffolds with high architectural control that can support and guide new tissue growth, opening exciting new avenues for repair of the human heart. This review discusses the recent advancements in the novel research field of fiber patterning manufacturing technologies for cardiac tissue engineering (cTE) and to what extent these technologies could meet the requirements of the highly organized and structured cardiac tissues. Additionally, future directions of these novel fiber patterning technologies, designs, and applicability to advance cTE are presented.
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Affiliation(s)
- Marleen Kristen
- Regenerative Medicine Center, University Medical Center Utrecht,
Utrecht 3584 CT, The Netherlands; Department of Orthopedics, University Medical
Center Utrecht, Utrecht 3584 CX, The Netherlands
| | - Madison J. Ainsworth
- Regenerative Medicine Center, University Medical Center Utrecht,
Utrecht 3584 CT, The Netherlands; Department of Orthopedics, University Medical
Center Utrecht, Utrecht 3584 CX, The Netherlands
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Brennan CM, Eichholz KF, Hoey DA. The effect of pore size within fibrous scaffolds fabricated using melt electrowriting on human bone marrow stem cell osteogenesis. ACTA ACUST UNITED AC 2019; 14:065016. [PMID: 31574493 DOI: 10.1088/1748-605x/ab49f2] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Limitations associated with current bone grafting materials has necessitated the development of synthetic scaffolds that mimic the native tissue for bone repair. Scaffold parameters such as pore size, pore interconnectivity, fibre diameter, and fibre stiffness are crucial parameters of fibrous bone tissue engineering (BTE) scaffolds required to replicate the native environment. Optimum values vary with material, fabrication method and cell type. Melt electrowriting (MEW) provides precise control over extracellular matrix (ECM)-like fibrous scaffold architecture. The goal of this study was to fabricate and characterise poly-ε-caprolactone (PCL) fibrous scaffolds with 100, 200, and 300 μm pore sizes using MEW and determine the influence of pore size on human bone marrow stem cell (hMSC) adhesion, morphology, proliferation, mechanosignalling and osteogenesis. Each scaffold was fabricated with a fibre diameter of 4.01 ± 0.06 μm. The findings from this study highlight the enhanced osteogenic effects of controlled micro-scale fibre deposition using MEW, where the benefits of 100 μm square pores in comparison with larger pore sizes are illustrated, a pore size traditionally reported as a lower limit for osteogenesis. This suggests a lower pore size is optimal when hMSCs are seeded in a 3D ECM-like fibrous structure, with the 100 μm pore size optimal as it demonstrates the highest global stiffness, local fibre stiffness, highest seeding efficiency, maintains a spread cellular morphology, and significantly enhances hMSC collagen and mineral deposition. Similarly, this platform represents an effective in vitro model for the study of hMSC behaviour to determine the significant osteogenic benefits of controlling ECM-like fibrous BTE scaffold pore size using MEW.
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Affiliation(s)
- C M Brennan
- Dept. of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Ireland. Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Ireland
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45
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Blum C, Schlegelmilch K, Schilling T, Shridhar A, Rudert M, Jakob F, Dalton PD, Blunk T, Flynn LE, Groll J. Extracellular Matrix-Modified Fiber Scaffolds as a Proadipogenic Mesenchymal Stromal Cell Delivery Platform. ACS Biomater Sci Eng 2019; 5:6655-6666. [DOI: 10.1021/acsbiomaterials.9b00894] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Carina Blum
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute (BPI), University Hospital of Würzburg, Pleicherwall 2, 97070 Würzburg, Germany
| | - Katrin Schlegelmilch
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute (BPI), University Hospital of Würzburg, Pleicherwall 2, 97070 Würzburg, Germany
| | - Tatjana Schilling
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute (BPI), University Hospital of Würzburg, Pleicherwall 2, 97070 Würzburg, Germany
| | - Arthi Shridhar
- Department of Chemical and Biochemical Engineering, Thompson Engineering Building, The University of Western Ontario, London, Ontario N6A 5B9, Canada
| | - Maximilian Rudert
- Department of Orthopedics, Orthopedic Center for Musculoskeletal Research, University of Würzburg, Brettreichstr. 11, 97074 Würzburg, Germany
| | - Franz Jakob
- Department of Orthopedics, Orthopedic Center for Musculoskeletal Research, University of Würzburg, Brettreichstr. 11, 97074 Würzburg, Germany
| | - Paul D. Dalton
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute (BPI), University Hospital of Würzburg, Pleicherwall 2, 97070 Würzburg, Germany
| | - Torsten Blunk
- Department of Trauma, Hand, Plastic and Reconstructive Surgery, University of Würzburg, Oberdürrbacher Str. 6, 97080 Würzburg, Germany
| | - Lauren E. Flynn
- Department of Chemical and Biochemical Engineering, Thompson Engineering Building, The University of Western Ontario, London, Ontario N6A 5B9, Canada
- Department of Anatomy and Cell Biology, Schulich School of Medicine & Dentistry, The University of Western Ontario, London, Ontario N6A 5C1, Canada
| | - Jürgen Groll
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute (BPI), University Hospital of Würzburg, Pleicherwall 2, 97070 Würzburg, Germany
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46
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Youssef A, Hrynevich A, Fladeland L, Balles A, Groll J, Dalton PD, Zabler S. The Impact of Melt Electrowritten Scaffold Design on Porosity Determined by X-Ray Microtomography. Tissue Eng Part C Methods 2019; 25:367-379. [PMID: 31119986 PMCID: PMC6589500 DOI: 10.1089/ten.tec.2018.0373] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 05/06/2019] [Indexed: 11/13/2022] Open
Abstract
IMPACT STATEMENT Melt electrowriting is an AM technology that bridges the gap between solution electrospinning and melt microextrusion technologies. It can be applied to biomaterials and tissue engineering by making a spectrum of scaffolds with various laydown patterns at dimensions not previously studied. Using submicrometer X-ray tomography, a "fingerprint" of porosity for such scaffolds can be obtained and used as an important measure for quality control, to ensure that the scaffold fabricated is the one designed and allows the selection of specific scaffolds based on desired porosities.
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Affiliation(s)
- Almoatazbellah Youssef
- Department for Functional Materials in Medicine and Dentistry, Bavarian Polymer Institute, University Hospital Würzburg, Würzburg, Germany
| | - Andrei Hrynevich
- Department for Functional Materials in Medicine and Dentistry, Bavarian Polymer Institute, University Hospital Würzburg, Würzburg, Germany
| | - Logan Fladeland
- Department for Functional Materials in Medicine and Dentistry, Bavarian Polymer Institute, University Hospital Würzburg, Würzburg, Germany
- Chair of X-Ray Microscopy (LRM), University of Würzburg, Würzburg, Germany
| | - Andreas Balles
- Chair of X-Ray Microscopy (LRM), University of Würzburg, Würzburg, Germany
| | - Jürgen Groll
- Department for Functional Materials in Medicine and Dentistry, Bavarian Polymer Institute, University Hospital Würzburg, Würzburg, Germany
| | - Paul D. Dalton
- Department for Functional Materials in Medicine and Dentistry, Bavarian Polymer Institute, University Hospital Würzburg, Würzburg, Germany
| | - Simon Zabler
- Chair of X-Ray Microscopy (LRM), University of Würzburg, Würzburg, Germany
- Fraunhofer Institute for Integrated Circuits (IIS), Würzburg, Germany
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Saidy NT, Wolf F, Bas O, Keijdener H, Hutmacher DW, Mela P, De-Juan-Pardo EM. Biologically Inspired Scaffolds for Heart Valve Tissue Engineering via Melt Electrowriting. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1900873. [PMID: 31058444 DOI: 10.1002/smll.201900873] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 04/14/2019] [Indexed: 06/09/2023]
Abstract
Heart valves are characterized to be highly flexible yet tough, and exhibit complex deformation characteristics such as nonlinearity, anisotropy, and viscoelasticity, which are, at best, only partially recapitulated in scaffolds for heart valve tissue engineering (HVTE). These biomechanical features are dictated by the structural properties and microarchitecture of the major tissue constituents, in particular collagen fibers. In this study, the unique capabilities of melt electrowriting (MEW) are exploited to create functional scaffolds with highly controlled fibrous microarchitectures mimicking the wavy nature of the collagen fibers and their load-dependent recruitment. Scaffolds with precisely-defined serpentine architectures reproduce the J-shaped strain stiffening, anisotropic and viscoelastic behavior of native heart valve leaflets, as demonstrated by quasistatic and dynamic mechanical characterization. They also support the growth of human vascular smooth muscle cells seeded both directly or encapsulated in fibrin, and promote the deposition of valvular extracellular matrix components. Finally, proof-of-principle MEW trileaflet valves display excellent acute hydrodynamic performance under aortic physiological conditions in a custom-made flow loop. The convergence of MEW and a biomimetic design approach enables a new paradigm for the manufacturing of scaffolds with highly controlled microarchitectures, biocompatibility, and stringent nonlinear and anisotropic mechanical properties required for HVTE.
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Affiliation(s)
- Navid T Saidy
- Centre in Regenerative Medicine, Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), 60 Musk Avenue, Kelvin Grove, Brisbane, Queensland, 4059, Australia
- Department of Biohybrid & Medical Textiles (BioTex), AME-Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Forckenbeckstr. 55, 52074, Aachen, Germany
| | - Frederic Wolf
- Department of Biohybrid & Medical Textiles (BioTex), AME-Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Forckenbeckstr. 55, 52074, Aachen, Germany
| | - Onur Bas
- Centre in Regenerative Medicine, Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), 60 Musk Avenue, Kelvin Grove, Brisbane, Queensland, 4059, Australia
- ARC ITTC in Additive Biomanufacturing, Queensland University of Technology, 60 Musk Avenue, Kelvin Grove, Brisbane, Queensland, 4059, Australia
| | - Hans Keijdener
- Department of Biohybrid & Medical Textiles (BioTex), AME-Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Forckenbeckstr. 55, 52074, Aachen, Germany
| | - Dietmar W Hutmacher
- Centre in Regenerative Medicine, Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), 60 Musk Avenue, Kelvin Grove, Brisbane, Queensland, 4059, Australia
- ARC ITTC in Additive Biomanufacturing, Queensland University of Technology, 60 Musk Avenue, Kelvin Grove, Brisbane, Queensland, 4059, Australia
- Institute for Advanced Study, Technische Universität München, D-85748, Garching, Germany
| | - Petra Mela
- Department of Biohybrid & Medical Textiles (BioTex), AME-Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Forckenbeckstr. 55, 52074, Aachen, Germany
- Medical Materials and Medical Implant Design, Department of Mechanical Engineering, Technical University of Munich, Boltzmannstr. 15, 85748, Garching,
| | - Elena M De-Juan-Pardo
- Centre in Regenerative Medicine, Institute of Health and Biomedical Innovation (IHBI), Queensland University of Technology (QUT), 60 Musk Avenue, Kelvin Grove, Brisbane, Queensland, 4059, Australia
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48
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McMaster R, Hoefner C, Hrynevich A, Blum C, Wiesner M, Wittmann K, Dargaville TR, Bauer‐Kreisel P, Groll J, Dalton PD, Blunk T. Tailored Melt Electrowritten Scaffolds for the Generation of Sheet-Like Tissue Constructs from Multicellular Spheroids. Adv Healthc Mater 2019; 8:e1801326. [PMID: 30835969 DOI: 10.1002/adhm.201801326] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 01/14/2019] [Indexed: 12/14/2022]
Abstract
Melt electrowriting (MEW) is an additive manufacturing technology that is recently used to fabricate voluminous scaffolds for biomedical applications. In this study, MEW is adapted for the seeding of multicellular spheroids, which permits the easy handling as a single sheet-like tissue-scaffold construct. Spheroids are made from adipose-derived stromal cells (ASCs). Poly(ε-caprolactone) is processed via MEW into scaffolds with box-structured pores, readily tailorable to spheroid size, using 13-15 µm diameter fibers. Two 7-8 µm diameter "catching fibers" near the bottom of the scaffold are threaded through each pore (360 and 380 µm) to prevent loss of spheroids during seeding. Cell viability remains high during the two week culture period, while the differentiation of ASCs into the adipogenic lineage is induced. Subsequent sectioning and staining of the spheroid-scaffold construct can be readily performed and accumulated lipid droplets are observed, while upregulation of molecular markers associated with successful differentiation is demonstrated. Tailoring MEW scaffolds with pores allows the simultaneous seeding of high numbers of spheroids at a time into a construct that can be handled in culture and may be readily transferred to other sites for use as implants or tissue models.
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Affiliation(s)
- Rebecca McMaster
- Department of Trauma, Hand, Plastic and Reconstructive SurgeryUniversity of Wuerzburg Oberduerrbacher Str. 6 97080 Wuerzburg Germany
- Institute of Health and Biomedical InnovationQueensland University of Technology 60 Musk Ave Kelvin Grove 4059 Australia
| | - Christiane Hoefner
- Department of Trauma, Hand, Plastic and Reconstructive SurgeryUniversity of Wuerzburg Oberduerrbacher Str. 6 97080 Wuerzburg Germany
| | - Andrei Hrynevich
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer InstituteUniversity of Wuerzburg Pleicherwall 2 97070 Wuerzburg Germany
| | - Carina Blum
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer InstituteUniversity of Wuerzburg Pleicherwall 2 97070 Wuerzburg Germany
| | - Miriam Wiesner
- Department of Trauma, Hand, Plastic and Reconstructive SurgeryUniversity of Wuerzburg Oberduerrbacher Str. 6 97080 Wuerzburg Germany
| | - Katharina Wittmann
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer InstituteUniversity of Wuerzburg Pleicherwall 2 97070 Wuerzburg Germany
| | - Tim R. Dargaville
- Institute of Health and Biomedical InnovationQueensland University of Technology 60 Musk Ave Kelvin Grove 4059 Australia
| | - Petra Bauer‐Kreisel
- Department of Trauma, Hand, Plastic and Reconstructive SurgeryUniversity of Wuerzburg Oberduerrbacher Str. 6 97080 Wuerzburg Germany
| | - Jürgen Groll
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer InstituteUniversity of Wuerzburg Pleicherwall 2 97070 Wuerzburg Germany
| | - Paul D. Dalton
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer InstituteUniversity of Wuerzburg Pleicherwall 2 97070 Wuerzburg Germany
| | - Torsten Blunk
- Department of Trauma, Hand, Plastic and Reconstructive SurgeryUniversity of Wuerzburg Oberduerrbacher Str. 6 97080 Wuerzburg Germany
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49
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Paxton NC, Ren J, Ainsworth MJ, Solanki AK, Jones JR, Allenby MC, Stevens MM, Woodruff MA. Rheological Characterization of Biomaterials Directs Additive Manufacturing of Strontium‐Substituted Bioactive Glass/Polycaprolactone Microfibers. Macromol Rapid Commun 2019; 40:e1900019. [DOI: 10.1002/marc.201900019] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Revised: 03/04/2019] [Indexed: 01/22/2023]
Affiliation(s)
- Naomi C. Paxton
- Institute of Health and Biomedical Innovation (IHBI)Queensland University of Technology (QUT) 60 Musk Ave Kelvin Grove QLD 4059 Australia
| | - Jiongyu Ren
- Institute of Health and Biomedical Innovation (IHBI)Queensland University of Technology (QUT) 60 Musk Ave Kelvin Grove QLD 4059 Australia
| | - Madison J. Ainsworth
- Institute of Health and Biomedical Innovation (IHBI)Queensland University of Technology (QUT) 60 Musk Ave Kelvin Grove QLD 4059 Australia
| | - Anu K. Solanki
- Department of MaterialsDepartment of Bioengineering and Institute of Biomedical EngineeringImperial College London London SW7 2BP UK
| | - Julian R. Jones
- Department of MaterialsImperial College London London SW7 2BP UK
| | - Mark C. Allenby
- Institute of Health and Biomedical Innovation (IHBI)Queensland University of Technology (QUT) 60 Musk Ave Kelvin Grove QLD 4059 Australia
| | - Molly M. Stevens
- Department of MaterialsDepartment of Bioengineering and Institute of Biomedical EngineeringImperial College London London SW7 2BP UK
| | - Maria A. Woodruff
- Institute of Health and Biomedical Innovation (IHBI)Queensland University of Technology (QUT) 60 Musk Ave Kelvin Grove QLD 4059 Australia
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50
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Fabrication of arbitrary three-dimensional suspended hollow microstructures in transparent fused silica glass. Nat Commun 2019; 10:1439. [PMID: 30926801 PMCID: PMC6441035 DOI: 10.1038/s41467-019-09497-z] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 03/13/2019] [Indexed: 11/10/2022] Open
Abstract
Fused silica glass is the preferred material for applications which require long-term chemical and mechanical stability as well as excellent optical properties. The manufacturing of complex hollow microstructures within transparent fused silica glass is of particular interest for, among others, the miniaturization of chemical synthesis towards more versatile, configurable and environmentally friendly flow-through chemistry as well as high-quality optical waveguides or capillaries. However, microstructuring of such complex three-dimensional structures in glass has proven evasive due to its high thermal and chemical stability as well as mechanical hardness. Here we present an approach for the generation of hollow microstructures in fused silica glass with high precision and freedom of three-dimensional designs. The process combines the concept of sacrificial template replication with a room-temperature molding process for fused silica glass. The fabricated glass chips are versatile tools for, among other, the advance of miniaturization in chemical synthesis on chip. Fused silica glass has excellent optical properties, chemical and thermal stability and hardness, but its microstructuring for miniaturized applications has proven difficult. Here the authors demonstrate obtainment of precise arbitrary three dimensional hollow microstructures in fused silica glass by sacrificial template replication.
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