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Hlukhaniuk A, Świętek M, Patsula V, Hodan J, Janoušková O, Bystrianský L, Brož A, Malić M, Zasońska B, Tokarz W, Bačáková L, Horák D. Poly(ε-Caprolactone)-Based Composites Modified With Polymer-Grafted Magnetic Nanoparticles and L-Ascorbic Acid for Bone Tissue Engineering. J Biomed Mater Res B Appl Biomater 2024; 112:e35480. [PMID: 39223717 DOI: 10.1002/jbm.b.35480] [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: 02/08/2024] [Revised: 07/03/2024] [Accepted: 08/09/2024] [Indexed: 09/04/2024]
Abstract
The aim of this study was to develop multifunctional magnetic poly(ε-caprolactone) (PCL) mats with antibacterial properties for bone tissue engineering and osteosarcoma prevention. To provide good dispersion of magnetic iron oxide nanoparticles (IONs), they were first grafted with PCL using a novel three-step approach. Then, a series of PCL-based mats containing a fixed amount of ION@PCL particles and an increasing content of ascorbic acid (AA) was prepared by electrospinning. AA is known for increasing osteoblast activity and suppressing osteosarcoma cells. Composites were characterized in terms of morphology, mechanical properties, hydrolytic stability, antibacterial performance, and biocompatibility. AA affected both the fiber diameter and the mechanical properties of the nanocomposites. All produced mats were nontoxic to rat bone marrow-derived mesenchymal cells; however, a composite with 5 wt.% of AA suppressed the initial proliferation of SAOS-2 osteoblast-like cells. Moreover, AA improved antibacterial properties against Staphylococcus aureus and Escherichia coli compared to PCL. Overall, these magnetic composites, reported for the very first time, can be used as scaffolds for both tissue regeneration and osteosarcoma prevention.
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Affiliation(s)
- Anna Hlukhaniuk
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Prague, Czech Republic
- Faculty of Science, Charles University, Prague, Czech Republic
| | - Małgorzata Świętek
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Prague, Czech Republic
| | - Vitalii Patsula
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Prague, Czech Republic
| | - Jiří Hodan
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Prague, Czech Republic
| | - Olga Janoušková
- Faculty of Science, Jan Evangelista Purkyně University in Ústí nad Labem, Ústí nad Labem, Czech Republic
| | - Lukáš Bystrianský
- Faculty of Science, Jan Evangelista Purkyně University in Ústí nad Labem, Ústí nad Labem, Czech Republic
| | - Antonín Brož
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Marina Malić
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Beata Zasońska
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Prague, Czech Republic
| | - Waldemar Tokarz
- Faculty of Physics and Applied Computer Science, AGH University of Krakow, Krakow, Poland
| | - Lucie Bačáková
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Daniel Horák
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Prague, Czech Republic
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Tang J, Dong Y, Cai L, Zhu Q, Shi J. Conformal 3D Printing Algorithm for Surfaces and Its In Situ Repair Applications. MICROMACHINES 2024; 15:920. [PMID: 39064431 PMCID: PMC11279153 DOI: 10.3390/mi15070920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Revised: 06/28/2024] [Accepted: 07/15/2024] [Indexed: 07/28/2024]
Abstract
Conformal 3D printing can construct specific three-dimensional structures on the free-form surfaces of target objects, achieving in situ additive manufacturing and repair, making it one of the cutting-edge technologies in the current field of 3D printing. To further improve the repair efficacy in tissue engineering, this study proposes a conformal path planning algorithm for in situ printing in specific areas of the target object. By designing the conformal 3D printing algorithm and utilizing vector projection and other methods, coordinate transformation of the printing trajectory was achieved. The algorithm was validated, showing good adherence of the printing material to the target surface. In situ repair experiments were also conducted on human hands and pig tibia defect models, verifying the feasibility of this method and laying a foundation for further research in personalized medicine and tissue repair.
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Affiliation(s)
- Jundong Tang
- School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing 210023, China; (J.T.); (Y.D.); (L.C.); (Q.Z.)
- Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing, NARI School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing 210023, China
| | - Yongli Dong
- School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing 210023, China; (J.T.); (Y.D.); (L.C.); (Q.Z.)
- Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing, NARI School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing 210023, China
| | - Lixiang Cai
- School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing 210023, China; (J.T.); (Y.D.); (L.C.); (Q.Z.)
- Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing, NARI School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing 210023, China
| | - Qian Zhu
- School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing 210023, China; (J.T.); (Y.D.); (L.C.); (Q.Z.)
- Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing, NARI School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing 210023, China
| | - Jianping Shi
- School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing 210023, China; (J.T.); (Y.D.); (L.C.); (Q.Z.)
- Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing, NARI School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing 210023, China
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Ke Re Mu ALM, Liang ZL, Chen L, Tu Xun AKBE, A Bu Li Ke Mu MMTAL, Wu YQ. 3D printed PLGA scaffold with nano-hydroxyapatite carrying linezolid for treatment of infected bone defects. Biomed Pharmacother 2024; 172:116228. [PMID: 38320333 DOI: 10.1016/j.biopha.2024.116228] [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: 11/23/2023] [Revised: 01/26/2024] [Accepted: 01/29/2024] [Indexed: 02/08/2024] Open
Abstract
BACKGROUND Linezolid has been reported to protect against chronic bone and joint infection. In this study, linezolid was loaded into the 3D printed poly (lactic-co-glycolic acid) (PLGA) scaffold with nano-hydroxyapatite (HA) to explore the effect of this composite scaffold on infected bone defect (IBD). METHODS PLGA scaffolds were produced using the 3D printing method. Drug release of linezolid was analyzed by elution and high-performance liquid chromatography assay. PLGA, PLGA-HA, and linezolid-loaded PLGA-HA scaffolds, were implanted into the defect site of a rabbit radius defect model. Micro-CT, H&E, and Masson staining, and immunohistochemistry were performed to analyze bone infection and bone healing. Evaluation of viable bacteria was performed. The cytocompatibility of 3D-printed composite scaffolds in vitro was detected using human bone marrow mesenchymal stem cells (BMSCs). Long-term safety of the scaffolds in rabbits was evaluated. RESULTS The linezolid-loaded PLGA-HA scaffolds exhibited a sustained release of linezolid and showed significant antibacterial effects. In the IBD rabbit models implanted with the scaffolds, the linezolid-loaded PLGA-HA scaffolds promoted bone healing and attenuated bone infection. The PLGA-HA scaffolds carrying linezolid upregulated the expression of osteogenic genes including collagen I, runt-related transcription factor 2, and osteocalcin. The linezolid-loaded PLGA-HA scaffolds promoted the proliferation and osteogenesis of BMSCs in vitro via the PI3K/AKT pathway. Moreover, the rabbits implanted with the linezolid-loaded scaffolds showed normal biochemical profiles and normal histology, which suggested the safety of the linezolid-loaded scaffolds. CONCLUSION Overall, the linezolid-loaded PLGA-HA scaffolds fabricated by 3D printing exerts significant bone repair and anti-infection effects.
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Affiliation(s)
- A Li Mu Ke Re Mu
- Orthopedics Center, First People's Hospital of Kashgar, Kashgar 844000, Xinjiang, China
| | - Zhi Lin Liang
- Orthopedics Center, First People's Hospital of Kashgar, Kashgar 844000, Xinjiang, China
| | - Linlin Chen
- Nanjing Genebios Biotechnology Co., Ltd., Nanjing 21100, China
| | - Ai Ke Bai Er Tu Xun
- Orthopedics Center, First People's Hospital of Kashgar, Kashgar 844000, Xinjiang, China
| | | | - Yuan Quan Wu
- Orthopedics Center, First People's Hospital of Kashgar, Kashgar 844000, Xinjiang, China.
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Huang S, Wen J, Zhang Y, Bai X, Cui ZK. Choosing the right animal model for osteomyelitis research: Considerations and challenges. J Orthop Translat 2023; 43:47-65. [PMID: 38094261 PMCID: PMC10716383 DOI: 10.1016/j.jot.2023.10.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/27/2023] [Accepted: 10/09/2023] [Indexed: 03/22/2024] Open
Abstract
Osteomyelitis is a debilitating bone disorder characterized by an inflammatory process involving the bone marrow, bone cortex, periosteum, and surrounding soft tissue, which can ultimately result in bone destruction. The etiology of osteomyelitis can be infectious, caused by various microorganisms, or noninfectious, such as chronic nonbacterial osteomyelitis (CNO) and chronic recurrent multifocal osteomyelitis (CRMO). Researchers have turned to animal models to study the pathophysiology of osteomyelitis. However, selecting an appropriate animal model that accurately recapitulates the human pathology of osteomyelitis while controlling for multiple variables that influence different clinical presentations remains a significant challenge. In this review, we present an overview of various animal models used in osteomyelitis research, including rodent, rabbit, avian/chicken, porcine, minipig, canine, sheep, and goat models. We discuss the characteristics of each animal model and the corresponding clinical scenarios that can provide a basic rationale for experimental selection. This review highlights the importance of selecting an appropriate animal model for osteomyelitis research to improve the accuracy of the results and facilitate the development of novel treatment and management strategies.
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Affiliation(s)
| | | | - Yiqing Zhang
- Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Xiaochun Bai
- Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Zhong-Kai Cui
- Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
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Zhou J, See CW, Sreenivasamurthy S, Zhu D. Customized Additive Manufacturing in Bone Scaffolds-The Gateway to Precise Bone Defect Treatment. RESEARCH (WASHINGTON, D.C.) 2023; 6:0239. [PMID: 37818034 PMCID: PMC10561823 DOI: 10.34133/research.0239] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 09/07/2023] [Indexed: 10/12/2023]
Abstract
In the advancing landscape of technology and novel material development, additive manufacturing (AM) is steadily making strides within the biomedical sector. Moving away from traditional, one-size-fits-all implant solutions, the advent of AM technology allows for patient-specific scaffolds that could improve integration and enhance wound healing. These scaffolds, meticulously designed with a myriad of geometries, mechanical properties, and biological responses, are made possible through the vast selection of materials and fabrication methods at our disposal. Recognizing the importance of precision in the treatment of bone defects, which display variability from macroscopic to microscopic scales in each case, a tailored treatment strategy is required. A patient-specific AM bone scaffold perfectly addresses this necessity. This review elucidates the pivotal role that customized AM bone scaffolds play in bone defect treatment, while offering comprehensive guidelines for their customization. This includes aspects such as bone defect imaging, material selection, topography design, and fabrication methodology. Additionally, we propose a cooperative model involving the patient, clinician, and engineer, thereby underscoring the interdisciplinary approach necessary for the effective design and clinical application of these customized AM bone scaffolds. This collaboration promises to usher in a new era of bioactive medical materials, responsive to individualized needs and capable of pushing boundaries in personalized medicine beyond those set by traditional medical materials.
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Affiliation(s)
- Juncen Zhou
- Department of Biomedical Engineering,
Stony Brook University, Stony Brook, NY, USA
| | - Carmine Wang See
- Department of Biomedical Engineering,
Stony Brook University, Stony Brook, NY, USA
| | - Sai Sreenivasamurthy
- Department of Biomedical Engineering,
Stony Brook University, Stony Brook, NY, USA
| | - Donghui Zhu
- Department of Biomedical Engineering,
Stony Brook University, Stony Brook, NY, USA
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Yuste I, Luciano FC, Anaya BJ, Sanz-Ruiz P, Ribed-Sánchez A, González-Burgos E, Serrano DR. Engineering 3D-Printed Advanced Healthcare Materials for Periprosthetic Joint Infections. Antibiotics (Basel) 2023; 12:1229. [PMID: 37627649 PMCID: PMC10451995 DOI: 10.3390/antibiotics12081229] [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: 06/19/2023] [Revised: 07/12/2023] [Accepted: 07/18/2023] [Indexed: 08/27/2023] Open
Abstract
The use of additive manufacturing or 3D printing in biomedicine has experienced fast growth in the last few years, becoming a promising tool in pharmaceutical development and manufacturing, especially in parenteral formulations and implantable drug delivery systems (IDDSs). Periprosthetic joint infections (PJIs) are a common complication in arthroplasties, with a prevalence of over 4%. There is still no treatment that fully covers the need for preventing and treating biofilm formation. However, 3D printing plays a major role in the development of novel therapies for PJIs. This review will provide a deep understanding of the different approaches based on 3D-printing techniques for the current management and prophylaxis of PJIs. The two main strategies are focused on IDDSs that are loaded or coated with antimicrobials, commonly in combination with bone regeneration agents and 3D-printed orthopedic implants with modified surfaces and antimicrobial properties. The wide variety of printing methods and materials have allowed for the manufacture of IDDSs that are perfectly adjusted to patients' physiognomy, with different drug release profiles, geometries, and inner and outer architectures, and are fully individualized, targeting specific pathogens. Although these novel treatments are demonstrating promising results, in vivo studies and clinical trials are required for their translation from the bench to the market.
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Affiliation(s)
- Iván Yuste
- Pharmaceutics and Food Technology Department, Faculty of Pharmacy, Universidad Complutense de Madrid (UCM), 28040 Madrid, Spain; (I.Y.); (F.C.L.); (B.J.A.); (D.R.S.)
| | - Francis C. Luciano
- Pharmaceutics and Food Technology Department, Faculty of Pharmacy, Universidad Complutense de Madrid (UCM), 28040 Madrid, Spain; (I.Y.); (F.C.L.); (B.J.A.); (D.R.S.)
| | - Brayan J. Anaya
- Pharmaceutics and Food Technology Department, Faculty of Pharmacy, Universidad Complutense de Madrid (UCM), 28040 Madrid, Spain; (I.Y.); (F.C.L.); (B.J.A.); (D.R.S.)
| | - Pablo Sanz-Ruiz
- Orthopaedic and Trauma Department, Hospital General Universitario Gregorio Marañón, 28029 Madrid, Spain;
- Department of Surgery, Faculty of Medicine, Universidad Complutense de Madrid (UCM), 28040 Madrid, Spain
| | - Almudena Ribed-Sánchez
- Hospital Pharmacy Unit, Hospital General Universitario Gregorio Marañón, 28029 Madrid, Spain;
| | - Elena González-Burgos
- Department of Pharmacology, Pharmacognosy and Botany, Faculty of Pharmacy, Universidad Complutense de Madrid (UCM), 28040 Madrid, Spain
| | - Dolores R. Serrano
- Pharmaceutics and Food Technology Department, Faculty of Pharmacy, Universidad Complutense de Madrid (UCM), 28040 Madrid, Spain; (I.Y.); (F.C.L.); (B.J.A.); (D.R.S.)
- Instituto Universitario de Farmacia Industrial, Faculty of Pharmacy, Universidad Complutense de Madrid (UCM), 28040 Madrid, Spain
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Guo F, Wang E, Yang Y, Mao Y, Liu C, Bu W, Li P, Zhao L, Jin Q, Liu B, Wang S, You H, Long Y, Zhou N, Guo W. A natural biomineral for enhancing the biomineralization and cell response of 3D printed polylactic acid bone scaffolds. Int J Biol Macromol 2023; 242:124728. [PMID: 37150372 DOI: 10.1016/j.ijbiomac.2023.124728] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 04/27/2023] [Accepted: 04/30/2023] [Indexed: 05/09/2023]
Abstract
Polylactic acid (PLA) has been extensively used as a bone scaffold material, but it still faces many problems including low biomineralization ability, weak cell response, low mechanical properties, etc. In this study, we proposed to utilize the distinctive physical, chemical and biological properties of a natural biomineral with organic matrix, pearl powder, to enhance the overall performance of PLA bone scaffolds. Porous PLA/pearl composite bone scaffolds were prepared using fused deposition modeling (FDM) 3D printing technology, and their comprehensive performance was investigated. Macro- and micro- morphological observation by optical camera and scanning electron microscopy (SEM) showed the 3D printed scaffolds have interconnected and ordered periodic porous structures. Phase analysis by X-ray diffraction (XRD) indicated pearl powder was well composited with PLA without impurity formation during the melt extrusion process. The mechanical test results indicated the tensile and compressive strength of PLA/pearl composite scaffolds with 10 % pearl powder content yielded the highest values, which were 15.5 % and 21.8 % greater than pure PLA, respectively. The water contact angle and water absorption tests indicated that PLA/pearl showed better hydrophilicity than PLA due to the presence of polar groups in the organic matrix of the pearl powder. The results of the simulated body fluid (SBF) soaking revealed that the addition of pearl powder effectively enhanced the formation and deposition of apatite, which was attributed to the release of Ca2+ from the dissolution of pearl powder. The cell culture of bone marrow mesenchymal stem cells (BMSCs) indicated that PLA/pearl scaffolds showed better cell proliferation and osteogenic differentiation than PLA due to the stimulation of the biological organic matrix in pearl powder. These outcomes signify the potential of pearl powder as a natural biomineral containing bio-signal factors to improve the mechanical and biological properties of polymers for better bone tissue engineering application.
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Affiliation(s)
- Feng Guo
- Department of Oral and Maxillofacial Surgery, College of Stomatology, Guangxi Medical University, Nanning 530021, China; Guangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and Reconstruction, Nanning 530021, China
| | - Enyu Wang
- Guangxi Key Laboratory of Manufacturing System and Advanced Manufacturing Technology, School of Mechanical Engineering, Guangxi University, Nanning 530004, China
| | - Yanjuan Yang
- Guangxi Key Laboratory of Manufacturing System and Advanced Manufacturing Technology, School of Mechanical Engineering, Guangxi University, Nanning 530004, China
| | - Yufeng Mao
- Guangxi Key Laboratory of Manufacturing System and Advanced Manufacturing Technology, School of Mechanical Engineering, Guangxi University, Nanning 530004, China
| | - Chao Liu
- Guangxi Key Laboratory of Manufacturing System and Advanced Manufacturing Technology, School of Mechanical Engineering, Guangxi University, Nanning 530004, China
| | - Wenlang Bu
- Guangxi Key Laboratory of Manufacturing System and Advanced Manufacturing Technology, School of Mechanical Engineering, Guangxi University, Nanning 530004, China
| | - Ping Li
- Guangxi Key Laboratory of Manufacturing System and Advanced Manufacturing Technology, School of Mechanical Engineering, Guangxi University, Nanning 530004, China
| | - Lei Zhao
- Guangxi Key Laboratory of Manufacturing System and Advanced Manufacturing Technology, School of Mechanical Engineering, Guangxi University, Nanning 530004, China
| | - Qingxin Jin
- Guangxi Key Laboratory of Manufacturing System and Advanced Manufacturing Technology, School of Mechanical Engineering, Guangxi University, Nanning 530004, China
| | - Bin Liu
- Department of Bone and Soft Tissue Surgery, Guangxi Medical University Cancer Hospital, Nanning 530021, China
| | - Shan Wang
- Department of Research, Guangxi Medical University Cancer Hospital, Nanning 530021, China
| | - Hui You
- Guangxi Key Laboratory of Manufacturing System and Advanced Manufacturing Technology, School of Mechanical Engineering, Guangxi University, Nanning 530004, China
| | - Yu Long
- Guangxi Key Laboratory of Manufacturing System and Advanced Manufacturing Technology, School of Mechanical Engineering, Guangxi University, Nanning 530004, China; State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China
| | - Nuo Zhou
- Department of Oral and Maxillofacial Surgery, College of Stomatology, Guangxi Medical University, Nanning 530021, China; Guangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and Reconstruction, Nanning 530021, China.
| | - Wang Guo
- Guangxi Key Laboratory of Manufacturing System and Advanced Manufacturing Technology, School of Mechanical Engineering, Guangxi University, Nanning 530004, China; State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China.
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Mayfield CK, Ayad M, Lechtholz-Zey E, Chen Y, Lieberman JR. 3D-Printing for Critical Sized Bone Defects: Current Concepts and Future Directions. Bioengineering (Basel) 2022; 9:680. [PMID: 36421080 PMCID: PMC9687148 DOI: 10.3390/bioengineering9110680] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/04/2022] [Accepted: 11/08/2022] [Indexed: 11/15/2023] Open
Abstract
The management and definitive treatment of segmental bone defects in the setting of acute trauma, fracture non-union, revision joint arthroplasty, and tumor surgery are challenging clinical problems with no consistently satisfactory solution. Orthopaedic surgeons are developing novel strategies to treat these problems, including three-dimensional (3D) printing combined with growth factors and/or cells. This article reviews the current strategies for management of segmental bone loss in orthopaedic surgery, including graft selection, bone graft substitutes, and operative techniques. Furthermore, we highlight 3D printing as a technology that may serve a major role in the management of segmental defects. The optimization of a 3D-printed scaffold design through printing technique, material selection, and scaffold geometry, as well as biologic additives to enhance bone regeneration and incorporation could change the treatment paradigm for these difficult bone repair problems.
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Affiliation(s)
- Cory K. Mayfield
- Department of Orthopaedic Surgery, Keck School of Medicine of USC, Los Angeles, CA 90033, USA
| | - Mina Ayad
- Department of Orthopaedic Surgery, Keck School of Medicine of USC, Los Angeles, CA 90033, USA
| | - Elizabeth Lechtholz-Zey
- Department of Orthopaedic Surgery, Keck School of Medicine of USC, Los Angeles, CA 90033, USA
| | - Yong Chen
- Department of Aerospace and Mechanical Engineering, Viterbi School of Engineering, University of Southern California, Los Angleles, CA 90089, USA
| | - Jay R. Lieberman
- Department of Orthopaedic Surgery, Keck School of Medicine of USC, Los Angeles, CA 90033, USA
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