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Nandakumar N, Iyyer S, Mohan T, Nair SV, Sathy BN. Smart Design for Hybrid Bioprinting of Scalable and Viable Tissue Constructs. Tissue Eng Part A 2024; 30:342-352. [PMID: 37930736 DOI: 10.1089/ten.tea.2023.0188] [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] [Indexed: 11/07/2023] Open
Abstract
Hybrid bioprinting uses sequential printing of melt-extruded biodegradable thermoplastic polymer and cell-encapsulated bioink in a predesigned manner using high- and low-temperature print heads for the fabrication of robust three-dimensional (3D) biological constructs. However, the high-temperature print head and melt-extruded polymer cause irreversible thermal damage to the bioprinted cells, and it affects viability and functionality of 3D bioprinted biological constructs. Thus, there is an urgent need to develop innovative approaches to protect the bioprinted cells, coming into contact or at close proximities to the melt-extruded thermoplastic polymer and the high-temperature print head during hybrid bioprinting. Therefore, this study investigated the potential of iterating the structural architecture pattern (SAP) of melt-printed thermoplastic layers and the cell printing pattern (CPP) to protect the cells from temperature-associated damage during hybrid bioprinting. A novel SAP for printing the thermoplastic polymer and an associated CPP for minimizing thermal damage to the 3D bioprinted construct have been developed. The newly developed SAP- and CPP-based hybrid bioprinted biological constructs showed significantly low thermal damage compared to conventionally hybrid bioprinted biological constructs. The results from this study suggest that the newly developed SAP and CPP can be an improved hybrid bioprinting strategy for developing living constructs at the human scale.
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Affiliation(s)
- Niji Nandakumar
- Amrita Centre for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham, Kochi, India
| | - Subramania Iyyer
- Department of Head and Neck Surgery and Oncology and Amrita Institute of Medical Sciences and Research Centre, Amrita Vishwa Vidyapeetham, Kochi, India
| | - Thadi Mohan
- Department of Orthopaedics, Amrita Institute of Medical Sciences and Research Centre, Amrita Vishwa Vidyapeetham, Kochi, India
| | - Shantikumar V Nair
- Amrita Centre for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham, Kochi, India
| | - Binulal N Sathy
- Amrita Centre for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham, Kochi, India
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Kelly C, Adams SB. 3D Printing Materials and Technologies for Orthopaedic Applications. J Orthop Trauma 2024; 38:S9-S12. [PMID: 38502597 DOI: 10.1097/bot.0000000000002765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/05/2024] [Indexed: 03/21/2024]
Abstract
SUMMARY 3D printing technologies have evolved tremendously over the last decade for uses in orthopaedic surgical applications, including being used to manufacture implants for spine, upper extremity, foot and ankle, oncologic, and traumatic reconstructions. Materials used for 3D-printed orthopaedic devices include metals, degradable and nondegradable polymers, and ceramic composites. There are 2 primary advantages for use of 3D printing technologies for orthopaedics: first, the ability to create complex porous lattices that allow for osseointegration and improved implant stability and second, the enablement of complex geometric designs allowing for patient-specific devices based on preoperative imaging. Given continually evolving technology, and the relatively early stage of the materials and 3D printers themselves, the possibilities for continued innovation in orthopaedics are great.
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Affiliation(s)
| | - Samuel B Adams
- Department of Orthopedic Surgery, Duke University Medical Center, Durham, NC
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Wang X, Li Z, Liu J, Wang C, Bai H, Zhu X, Wang H, Wang Z, Liu H, Wang J. 3D-printed PCL scaffolds with anatomy-inspired bionic stratified structures for the treatment of growth plate injuries. Mater Today Bio 2023; 23:100833. [PMID: 37920293 PMCID: PMC10618519 DOI: 10.1016/j.mtbio.2023.100833] [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: 04/23/2023] [Revised: 07/27/2023] [Accepted: 10/14/2023] [Indexed: 11/04/2023] Open
Abstract
The growth plate is a cartilaginous tissue with three distinct zones. Resident chondrocytes are highly organized in a columnar structure, which is critical for the longitudinal growth of immature long bones. Once injured, the growth plate may potentially be replaced by bony bar formation and, consequently, cause limb abnormalities in children. It is well-known that the essential step in growth plate repair is the remolding of the organized structure of chondrocytes. To achieve this, we prepared an anatomy-inspired bionic Poly(ε-caprolactone) (PCL) scaffold with a stratified structure using three-dimensional (3D) printing technology. The bionic scaffold is engineered by surface modification of NaOH and collagen Ⅰ (COL Ⅰ) to promote cell adhesion. Moreover, chondrocytes and bone marrow mesenchymal stem cells (BMSCs) are loaded in the most suitable ratio of 1:3 for growth plate reconstruction. Based on the anatomical structure of the growth plate, the bionic scaffold is designed to have three regions, which are the small-, medium-, and large-pore-size regions. These pore sizes are used to induce BMSCs to differentiate into similar structures such as the growth plate. Remarkably, the X-ray and histological results also demonstrate that the cell-loaded stratified scaffold can successfully rebuild the structure of the growth plate and reduce limb abnormalities, including limb length discrepancies and angular deformities in vivo. This study provides a potential method of preparing a bioinspired stratified scaffold for the treatment of growth plate injuries.
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Affiliation(s)
- Xianggang Wang
- Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun, 130041, PR China
- Orthopaedic Research Institute of Jilin Province, Changchun, 130041, PR China
| | - Zuhao Li
- Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun, 130041, PR China
- Orthopaedic Research Institute of Jilin Province, Changchun, 130041, PR China
| | - Jiaqi Liu
- Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun, 130041, PR China
- Orthopaedic Research Institute of Jilin Province, Changchun, 130041, PR China
| | - Chenyu Wang
- Department of Plastic and Reconstructive Surgery, The First Hospital of Jilin University, Changchun, 130021, PR China
| | - Haotian Bai
- Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun, 130041, PR China
- Orthopaedic Research Institute of Jilin Province, Changchun, 130041, PR China
| | - Xiujie Zhu
- Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun, 130041, PR China
- Orthopaedic Research Institute of Jilin Province, Changchun, 130041, PR China
| | - Hui Wang
- Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun, 130041, PR China
- Orthopaedic Research Institute of Jilin Province, Changchun, 130041, PR China
| | - Zhonghan Wang
- Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun, 130041, PR China
- Orthopaedic Research Institute of Jilin Province, Changchun, 130041, PR China
| | - He Liu
- Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun, 130041, PR China
- Orthopaedic Research Institute of Jilin Province, Changchun, 130041, PR China
| | - Jincheng Wang
- Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun, 130041, PR China
- Orthopaedic Research Institute of Jilin Province, Changchun, 130041, PR China
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Mahdian M, Tabatabai TS, Abpeikar Z, Rezakhani L, Khazaei M. Nerve regeneration using decellularized tissues: challenges and opportunities. Front Neurosci 2023; 17:1295563. [PMID: 37928728 PMCID: PMC10620322 DOI: 10.3389/fnins.2023.1295563] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Accepted: 10/06/2023] [Indexed: 11/07/2023] Open
Abstract
In tissue engineering, the decellularization of organs and tissues as a biological scaffold plays a critical role in the repair of neurodegenerative diseases. Various protocols for cell removal can distinguish the effects of treatment ability, tissue structure, and extracellular matrix (ECM) ability. Despite considerable progress in nerve regeneration and functional recovery, the slow regeneration and recovery potential of the central nervous system (CNS) remains a challenge. The success of neural tissue engineering is primarily influenced by composition, microstructure, and mechanical properties. The primary objective of restorative techniques is to guide existing axons properly toward the distal end of the damaged nerve and the target organs. However, due to the limitations of nerve autografts, researchers are seeking alternative methods with high therapeutic efficiency and without the limitations of autograft transplantation. Decellularization scaffolds, due to their lack of immunogenicity and the preservation of essential factors in the ECM and high angiogenic ability, provide a suitable three-dimensional (3D) substrate for the adhesion and growth of axons being repaired toward the target organs. This study focuses on mentioning the types of scaffolds used in nerve regeneration, and the methods of tissue decellularization, and specifically explores the use of decellularized nerve tissues (DNT) for nerve transplantation.
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Affiliation(s)
- Maryam Mahdian
- Student Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Tayebeh Sadat Tabatabai
- Student Research Committee, School of Medicine, Shahroud University of Medical Sciences, Shahroud, Iran
| | - Zahra Abpeikar
- Department of Tissue Engineering, School of Advanced Technologies in Medicine, Fasa University of Medical Sciences, Fasa, Iran
| | - Leila Rezakhani
- Fertility and Infertility Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
- Department of Tissue Engineering, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mozafar Khazaei
- Fertility and Infertility Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
- Department of Tissue Engineering, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
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Snyder Y, Jana S. Elastomeric Trilayer Substrates with Native-like Mechanical Properties for Heart Valve Leaflet Tissue Engineering. ACS Biomater Sci Eng 2023; 9:1570-1584. [PMID: 36802499 DOI: 10.1021/acsbiomaterials.2c01430] [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] [Indexed: 02/22/2023]
Abstract
Heart valve leaflets have a complex trilayered structure with layer-specific orientations, anisotropic tensile properties, and elastomeric characteristics that are difficult to mimic collectively. Previously, trilayer leaflet substrates intended for heart valve tissue engineering were developed with nonelastomeric biomaterials that cannot deliver native-like mechanical properties. In this study, by electrospinning polycaprolactone (PCL) polymer and poly(l-lactide-co-ε-caprolactone) (PLCL) copolymer, we created elastomeric trilayer PCL/PLCL leaflet substrates with native-like tensile, flexural, and anisotropic properties and compared them with trilayer PCL leaflet substrates (as control) to find their effectiveness in heart valve leaflet tissue engineering. These substrates were seeded with porcine valvular interstitial cells (PVICs) and cultured for 1 month in static conditions to produce cell-cultured constructs. The PCL/PLCL substrates had lower crystallinity and hydrophobicity but higher anisotropy and flexibility than PCL leaflet substrates. These attributes contributed to more significant cell proliferation, infiltration, extracellular matrix production, and superior gene expression in the PCL/PLCL cell-cultured constructs than in the PCL cell-cultured constructs. Further, the PCL/PLCL constructs showed better resistance to calcification than PCL constructs. Trilayer PCL/PLCL leaflet substrates with native-like mechanical and flexural properties could significantly improve heart valve tissue engineering.
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Affiliation(s)
- Yuriy Snyder
- Department of Bioengineering, University of Missouri, Columbia, Missouri 65211, United States
| | - Soumen Jana
- Department of Bioengineering, University of Missouri, Columbia, Missouri 65211, United States
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Luo C, Liu S, Luo W, Wang J, He H, Chen C, Xiao L, Liu C, Li Y. Fabrication of PLCL Block Polymer with Tunable Structure and Properties for Biomedical Application. Macromol Biosci 2023; 23:e2200507. [PMID: 36645702 DOI: 10.1002/mabi.202200507] [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: 11/22/2022] [Revised: 12/26/2022] [Indexed: 01/17/2023]
Abstract
Biodegradable materials are pivotal in the biomedical field, where how to precisely control their structure and performance is critical for their translational application. In this study, poly(L-lactide-b-ε-caprolactone) block copolymers (bPLCL) with well-defined segment structure are obtained by a first synthesis of poly(ε-caprolactone) soft block, followed by ring opening polymerization of lactide to form poly(L-lactide acid) hard block. The pre-polymerization allows for fabrication of bPLCL with the definite compositions of soft/hard segment while preserving the individual segment of their special soft or hard segment. These priorities make the bPLCL afford biodegradable polymer with better mechanical and biodegradable controllability than the random poly(L-lactide-co-ε-caprolactone) (rPLCL) synthesized via traditional one-pot polymerization. 10 mol% ε-caprolactone introduction can result in a formation of an elastic polymer with elongation at break of 286.15% ± 55.23%. Also, bPLCL preserves the unique crystalline structure of the soft and hard segments to present a more sustainable biodegradability than the rPLCL. The combinative merits make the pre-polymerization technique a promising strategy for a scalable production of PLCL materials for potential biomedical application.
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Affiliation(s)
- Chenmin Luo
- Engineering Research Center for Biomedical Materials of Ministry of Education, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Material Science & Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Shengyang Liu
- Engineering Research Center for Biomedical Materials of Ministry of Education, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Material Science & Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Wei Luo
- Wenzhou Institute of Shanghai University, Wenzhou, 325000, China
| | - Jing Wang
- Engineering Research Center for Biomedical Materials of Ministry of Education, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Material Science & Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Hongyan He
- Engineering Research Center for Biomedical Materials of Ministry of Education, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Material Science & Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Can Chen
- Engineering Research Center for Biomedical Materials of Ministry of Education, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Material Science & Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Lan Xiao
- School of Mechanical, Medical and Process Engineering, Centre for Biomedical Technologies, Queensland University of Technology (QUT), 60 Musk Avenue, Kelvin Grove, QLD 4059, Brisbane, Queensland, 4000, Australia.,The Australia-China Centre for Tissue Engineering and Regenerative Medicine (ACCTERM), Queensland University of Technology (QUT), 60 Musk Avenue, Kelvin Grove, QLD 4059, Brisbane, Queensland, 4000, Australia
| | - Changsheng Liu
- Engineering Research Center for Biomedical Materials of Ministry of Education, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Material Science & Engineering, East China University of Science and Technology, Shanghai, 200237, China.,Wenzhou Institute of Shanghai University, Wenzhou, 325000, China
| | - Yulin Li
- Engineering Research Center for Biomedical Materials of Ministry of Education, Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Material Science & Engineering, East China University of Science and Technology, Shanghai, 200237, China.,Wenzhou Institute of Shanghai University, Wenzhou, 325000, China
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Nie Y, Li C, Zhan H, Kou L, Gu Y. Effect of nonaffine displacement on the mechanical performance of degraded PCL and its graphene composites: an atomistic investigation. NANOSCALE 2022; 14:14082-14096. [PMID: 36056646 DOI: 10.1039/d2nr03084e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Evaluating the mechanical properties of biodegradable implants can be challenging for in situ experiments and time-consuming for materials with a slow degradation rate, such as polycaprolactone (PCL). In this work, the effects of chain scission and water erosion on the mechanical properties of degraded PCL are investigated by molecular dynamics simulation. The decrease of the mechanical performance is correlated with the increase of the nonaffine displacement during the degradation. The nonaffine squared displacements (NSD) during the tensile deformation are calculated by subtracting the affine squared displacements from the mean squared displacements. After chain scission, short polymer chains increase the NSD of the system and weaken the modulus of the polymer matrix. The effect of the NSD is also observed in a water erosion model. When the bond break ratio is less than 5%, PCL still maintains a well-entangled network, which constrains the diffusion of the water molecules, resulting in a higher modulus of the erosion model than the chain scission model at a low degradation rate. The effect of NSD is also found in the PCL/graphene composites. For the degraded polymer chains, the diffusion of PCL is constrained by the graphene network, and such an effect increases during the degradation. As a result, the addition of graphene nanosheets slows down the decreasing trend of Young's modulus. Such findings can also explain the size effect of the graphene reinforcement on the mechanical properties of the polymer composites. This work provides atomistic insights into the mechanical property evolution during polymer degradation, revealing the possibility of tuning the mechanical performance by controlling the diffusion, which could be beneficial for the design and lifetime prediction of degradable implants.
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Affiliation(s)
- Yihan Nie
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4001, Australia.
| | - Chengkai Li
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4001, Australia.
| | - Haifei Zhan
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China.
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4001, Australia.
- Center for Materials Science, Queensland University of Technology (QUT), Brisbane, Queensland 4001, Australia
| | - Liangzhi Kou
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4001, Australia.
- Center for Materials Science, Queensland University of Technology (QUT), Brisbane, Queensland 4001, Australia
| | - Yuantong Gu
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4001, Australia.
- Center for Materials Science, Queensland University of Technology (QUT), Brisbane, Queensland 4001, Australia
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Duan R, Wang Y, Su D, Wang Z, Zhang Y, Du B, Liu L, Li X, Zhang Q. The effect of blending poly (l-lactic acid) on in vivo performance of 3D-printed poly(l-lactide-co-caprolactone)/PLLA scaffolds. BIOMATERIALS ADVANCES 2022; 138:212948. [PMID: 35913240 DOI: 10.1016/j.bioadv.2022.212948] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 04/29/2022] [Accepted: 05/23/2022] [Indexed: 06/15/2023]
Abstract
Blending poly (l-lactic acid, PLLA) with poly (l-lactide-co-caprolactone, PLCL) is an effective strategy for developing new PLCL/PLLA blend based biomaterials. However, the effect of PLLA on in vivo performance of PLCL/PLLA blends is unclear yet. To address this issue, in this study, the effect of PLLA on in vivo biodegradability and biocompatibility of 3D-printed scaffolds of PLCL/PLLA blend was investigated. Three kinds of different 3D-printed PLCL/PLLA scaffolds using different blends with different mass ratios of the polymers, were prepared and implanted subcutaneously. The shrinkage and tissue responses were monitored by ultrasonography after the implantation. 2 months post-operation, the in vivo performances of the scaffolds were investigated histologically. All scaffolds showed good biocompatibility and allowed fast tissues ingrowth, however PLCL50/PLLA50 scaffold with the highest PLLA ratio induced the thickest the fibrous capsule surrounding the scaffolds and highest inflammatory scores. Furthermore, it was found that the fine porous structures of all scaffolds were well maintained, indicating the 3D-printed scaffolds were degraded through a surface erosion but not bulk erosion way. However, different scaffolds showed different shrinkage and degradation ratios, and PLCL50/PLLA50 scaffold resulted in a significant shrinkage, while PLCL90/PLLA10 scaffold showed the better structural stability. Therefore, PLLA at blending different ratio had different effects on the in vivo performance of 3D-printed PLCL/PLLA scaffolds. Particularly, PLCL/PLLA scaffolds blending with low ratio of PLLA, such as PLCL90/PLLA10 scaffold showed better application potential in tissue engineering. Our findings provide a new insight on the rational design, constrcution and application of the 3D-printed PLCL/PLLA scaffolds.
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Affiliation(s)
- Ruiping Duan
- The Key Laboratory of Biomedical Material of Tianjin, Biomedical Barriers Research Center, Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Biomedical Engineering. 236 Baidi Road, NanKai District, Tianjin, PR China
| | - Yimeng Wang
- The Key Laboratory of Biomedical Material of Tianjin, Biomedical Barriers Research Center, Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Biomedical Engineering. 236 Baidi Road, NanKai District, Tianjin, PR China
| | - Danning Su
- The Key Laboratory of Biomedical Material of Tianjin, Biomedical Barriers Research Center, Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Biomedical Engineering. 236 Baidi Road, NanKai District, Tianjin, PR China
| | - Ziqiang Wang
- The Key Laboratory of Biomedical Material of Tianjin, Biomedical Barriers Research Center, Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Biomedical Engineering. 236 Baidi Road, NanKai District, Tianjin, PR China
| | - Yiyun Zhang
- The Key Laboratory of Biomedical Material of Tianjin, Biomedical Barriers Research Center, Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Biomedical Engineering. 236 Baidi Road, NanKai District, Tianjin, PR China
| | - Bo Du
- The Key Laboratory of Biomedical Material of Tianjin, Biomedical Barriers Research Center, Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Biomedical Engineering. 236 Baidi Road, NanKai District, Tianjin, PR China
| | - Lingrong Liu
- The Key Laboratory of Biomedical Material of Tianjin, Biomedical Barriers Research Center, Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Biomedical Engineering. 236 Baidi Road, NanKai District, Tianjin, PR China
| | - Xuemin Li
- The Key Laboratory of Biomedical Material of Tianjin, Biomedical Barriers Research Center, Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Biomedical Engineering. 236 Baidi Road, NanKai District, Tianjin, PR China.
| | - Qiqing Zhang
- Institute of Biomedical Engineering, the Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, Guangdong 518020, PR China.
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Song J, Li S, Han J. Performance of nitrogenous polybutylene succinate/polylactic acid materials and their degradation effects on physiological indicators of lettuce. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2022.105294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Yu K, Gao Q, Lu L, Zhang P. A Process Parameter Design Method for Improving the Filament Diameter Accuracy of Extrusion 3D Printing. MATERIALS 2022; 15:ma15072454. [PMID: 35407791 PMCID: PMC8999365 DOI: 10.3390/ma15072454] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 03/24/2022] [Accepted: 03/24/2022] [Indexed: 12/23/2022]
Abstract
Process parameters have a significant impact on the filament diameter of extrusion 3D printing. To precisely control filament diameter, this paper proposes a novel method based on experiments to guide process parameter design. Additionally, an extrusion 3D printing device was developed, by which the influence of crucial process parameters and rheological properties on the diameter of printed filaments could be investigated experimentally and theoretically. Furthermore, poly (l-lactide-co-ε-caprolactone) (PLCL) was used as a case study to detail the design procedure of the proposed method. The printable range of the process parameters for PLCL was acquired, and a fitting surface for the experimental data was calculated to guide the process parameter design. According to the results of the experiment, by adjusting the process parameters, PLCL filaments with five different diameters of 120, 130, 140, 150, and 160 μm can be fabricated with a 100 μm nozzle. The deviations between the actual filament diameters and the desired diameter are less than 5 μm, which validates the reliability of the proposed method.
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Affiliation(s)
- Kaicheng Yu
- School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China; (K.Y.); (P.Z.)
- Research Center of Precision Equipment and Technology, Chongqing Research Institute of HIT, Chongqing 400000, China
| | - Qiang Gao
- School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China; (K.Y.); (P.Z.)
- Research Center of Precision Equipment and Technology, Chongqing Research Institute of HIT, Chongqing 400000, China
- School of Astronautics, Harbin Institute of Technology, Harbin 150001, China
- Correspondence: (Q.G.); (L.L.)
| | - Lihua Lu
- School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China; (K.Y.); (P.Z.)
- Research Center of Precision Equipment and Technology, Chongqing Research Institute of HIT, Chongqing 400000, China
- Correspondence: (Q.G.); (L.L.)
| | - Peng Zhang
- School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China; (K.Y.); (P.Z.)
- Research Center of Precision Equipment and Technology, Chongqing Research Institute of HIT, Chongqing 400000, China
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Ravoor J, Thangavel M, Elsen S R. Comprehensive Review on Design and Manufacturing of Bio-scaffolds for Bone Reconstruction. ACS APPLIED BIO MATERIALS 2021; 4:8129-8158. [PMID: 35005929 DOI: 10.1021/acsabm.1c00949] [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] [Indexed: 01/05/2023]
Abstract
Bio-scaffolds are synthetic entities widely employed in bone and soft-tissue regeneration applications. These bio-scaffolds are applied to the defect site to provide support and favor cell attachment and growth, thereby enhancing the regeneration of the defective site. The progressive research in bio-scaffold fabrication has led to identification of biocompatible and mechanically stable materials. The difficulties in obtaining grafts and expenditure incurred in the transplantation procedures have also been overcome by the implantation of bio-scaffolds. Drugs, cells, growth factors, and biomolecules can be embedded with bio-scaffolds to provide localized treatments. The right choice of materials and fabrication approaches can help in developing bio-scaffolds with required properties. This review mostly focuses on the available materials and bio-scaffold techniques for bone and soft-tissue regeneration application. The first part of this review gives insight into the various classes of biomaterials involved in bio-scaffold fabrication followed by design and simulation techniques. The latter discusses the various additive, subtractive, hybrid, and other improved techniques involved in the development of bio-scaffolds for bone regeneration applications. Techniques involving multimaterial printing and multidimensional printing have also been briefly discussed.
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Affiliation(s)
- Jishita Ravoor
- School of Mechanical Engineering Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India
| | - Mahendran Thangavel
- School of Mechanical Engineering Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India
| | - Renold Elsen S
- School of Mechanical Engineering Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India
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