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Yang C, Zhu K, Cheng M, Yuan X, Wang S, Zhang L, Zhang X, Wang Q. Graphene oxide-decorated microporous sulfonated polyetheretherketone for guiding osteoporotic bone regeneration. J Control Release 2024; 374:15-27. [PMID: 39111596 DOI: 10.1016/j.jconrel.2024.07.054] [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: 04/10/2024] [Revised: 07/21/2024] [Accepted: 07/22/2024] [Indexed: 08/10/2024]
Abstract
Recent studies have indicated that the nucleotide-binding oligomerization domain-like receptor family pyrin domain-containing 3 (NLRP3) inflammasome is an ideal therapeutic target for osteoporosis because it affects the differentiation of osteoblasts and osteoclasts. RNA sequencing utilizing multifunctional graphene oxide (GO) nanosheets revealed a correlation between GO nanomaterials and the NLRP3 inflammasome, as well as osteogenic genes in macrophages. This study aimed to construct a bone microenvironment-responsive multifunctional two-dimensional GO coating on the surface of microporous sulfonated polyetheretherketone (SPEEK) via polydopamine modification (SPEEK@PDA-GO). In vitro analysis showed that the SPEEK@PDA-GO implants weakened the STAT3-mediated NLRP3/caspase-1/IL-1β signaling pathway in macrophages and subsequently prevented the formation of an extracellular inflammatory microenvironment, which is crucial for osteoclastogenesis. SPEEK@PDA-GO displayed significantly higher expression of M2 macrophage markers and osteogenic genes, indicating that the multifunctional GO nanosheets could facilitate bone regeneration via their immunomodulatory properties. The ability of SPEEK@PDA-GO to stimulate new bone formation and block bone loss caused by estrogen loss due to ovariectomy was also analyzed. The findings of this study offer valuable information on the possible involvement of the NLRP3 inflammasome in the interaction between the immune system and bone health in patients with osteoporosis.
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Affiliation(s)
- Chao Yang
- Department of Orthopedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200233, China
| | - Kechao Zhu
- Department of Orthopedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200233, China
| | - Mengqi Cheng
- Department of Orthopedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200233, China
| | - Xiangwei Yuan
- Department of Orthopedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200233, China
| | - Shengjie Wang
- Department of Orthopedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200233, China
| | - Lei Zhang
- Department of Orthopedics, Nanjing Jinling Hospital, Affliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu Province, China.
| | - Xianlong Zhang
- Department of Orthopedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200233, China.
| | - Qi Wang
- Department of Orthopedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200233, China.
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Micheletti C, DiCecco LA, Deering J, Chen W, Ervolino da Silva AC, Shah FA, Palmquist A, Okamoto R, Grandfield K. Mesoscale characterization of osseointegration around an additively manufactured genistein-coated implant. Sci Rep 2024; 14:15339. [PMID: 38961115 PMCID: PMC11222380 DOI: 10.1038/s41598-024-66058-1] [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: 10/29/2023] [Accepted: 06/26/2024] [Indexed: 07/05/2024] Open
Abstract
Given the hierarchical nature of bone and bone interfaces, osseointegration, namely the formation of a direct bone-implant contact, is best evaluated using a multiscale approach. However, a trade-off exists between field of view and spatial resolution, making it challenging to image large volumes with high resolution. In this study, we combine established electron microscopy techniques to probe bone-implant interfaces at the microscale and nanoscale with plasma focused ion beam-scanning electron microscopy (PFIB-SEM) tomography to evaluate osseointegration at the mesoscale. This characterization workflow is demonstrated for bone response to an additively manufactured Ti-6Al-4V implant which combines engineered porosity to facilitate bone ingrowth and surface functionalization via genistein, a phytoestrogen, to counteract bone loss in osteoporosis. SEM demonstrated new bone formation at the implant site, including in the internal implant pores. At the nanoscale, scanning transmission electron microscopy and energy-dispersive X-ray spectroscopy confirmed the gradual nature of the bone-implant interface. By leveraging mesoscale analysis with PFIB-SEM tomography that captures large volumes of bone-implant interface with nearly nanoscale resolution, the presence of mineral ellipsoids varying in size and orientation was revealed. In addition, a well-developed lacuno-canalicular network and mineralization fronts directed both towards the implant and away from it were highlighted.
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Affiliation(s)
- Chiara Micheletti
- Department of Materials Science and Engineering, McMaster University, Hamilton, ON, Canada.
- Department of Biomaterials, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
| | - Liza-Anastasia DiCecco
- Department of Materials Science and Engineering, McMaster University, Hamilton, ON, Canada
| | - Joseph Deering
- Department of Materials Science and Engineering, McMaster University, Hamilton, ON, Canada
| | - Wanqi Chen
- Department of Materials Science and Engineering, McMaster University, Hamilton, ON, Canada
| | | | - Furqan A Shah
- Department of Biomaterials, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Anders Palmquist
- Department of Biomaterials, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Roberta Okamoto
- Department of Basic Sciences, Araçatuba Dental School, São Paulo State University, Araçatuba, SP, Brazil
- Research Productivity Scholarship (Process: 309408/2020-2), Araçatuba, SP, Brazil
| | - Kathryn Grandfield
- Department of Materials Science and Engineering, McMaster University, Hamilton, ON, Canada.
- School of Biomedical Engineering, McMaster University, Hamilton, ON, Canada.
- Brockhouse Institute for Materials Research, McMaster University, Hamilton, ON, Canada.
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Kang J, Wu Y, Qiao J. Numerical evaluation of spinal reconstruction using a 3D printed vertebral body replacement implant: effects of material anisotropy. Front Bioeng Biotechnol 2024; 12:1305837. [PMID: 38966191 PMCID: PMC11222561 DOI: 10.3389/fbioe.2024.1305837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 06/03/2024] [Indexed: 07/06/2024] Open
Abstract
Background and objective Artificial vertebral implants have been widely used for functional reconstruction of vertebral defects caused by tumors or trauma. However, the evaluation of their biomechanical properties often neglects the influence of material anisotropy derived from the host bone and implant's microstructures. Hence, this study aims to investigate the effect of material anisotropy on the safety and stability of vertebral reconstruction. Material and methods Two finite element models were developed to reflect the difference of material properties between linear elastic isotropy and nonlinear anisotropy. Their biomechanical evaluation was carried out under different load conditions including flexion, extension, lateral bending and axial rotation. These performances of two models with respect to safety and stability were analyzed and compared quantitatively based on the predicted von Mises stress, displacement and effective strain. Results The maximum von Mises stress of each component in both models was lower than the yield strength of respective material, while the predicted results of nonlinear anisotropic model were generally below to those of the linear elastic isotropic model. Furthermore, the maximum von Mises stress of natural vertebra and reconstructed system was decreased by 2-37 MPa and 20-61 MPa, respectively. The maximum reductions for the translation displacement of the artificial vertebral body implant and motion range of whole model were reached to 0.26 mm and 0.77°. The percentage of effective strain elements on the superior and inferior endplates adjacent to implant was diminished by up to 19.7% and 23.1%, respectively. Conclusion After comprehensive comparison, these results indicated that the finite element model with the assumption of linear elastic isotropy may underestimate the safety of the reconstruction system, while misdiagnose higher stability by overestimating the range of motion and bone growth capability.
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Affiliation(s)
| | | | - Jian Qiao
- School of Mechatronic Engineering and Automation, Foshan University, Foshan, China
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Rudari M, Breuer J, Lauer H, Stepien L, Lopez E, Dragu A, Alawi SA. Accuracy of Three-dimensional Scan Technology and Its Possible Function in the Field of Hand Surgery. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2024; 12:e5745. [PMID: 38655101 PMCID: PMC11037731 DOI: 10.1097/gox.0000000000005745] [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: 11/21/2023] [Accepted: 02/27/2024] [Indexed: 04/26/2024]
Abstract
Background Three-dimensional (3D) technology has become a standard manufacturing element in many industries and has gained significant interest in plastic surgery. The 3D scans are widely used for patient communication, virtual surgery planning, and intraoperative tool manufacturing, providing a more comprehensive view of procedures and their outcomes compared with 2D visualization. Methods We evaluated the performance of six commercially available 3D scanners by acquiring 3D models of a human hand and a 3D-printed replica of a human hand. We performed objective comparisons between the 3D models of the replica using color mapping techniques. Moreover, we compared the results of the human hand 3D scans. Results We achieved the highest precision with the Artec Space Spider 3D scanner (Artec 3D) when scanning the 3D-printed replica. The SD was ±0.05 mm, and the scan did not have major defects that needed manual correction. On the human hand scan, we achieved the best results using the Artec Eva (Artec 3D), the resulting scan was an accurate digital representation of the scanned human hand. Conclusions In our study, the Artec Space Spider 3D scanner demonstrated superior precision when scanning a 3D-printed replica, deviating only slightly from the original data, making it an optimal choice for nonmoving objects such as casts or medical instruments. For scanning human hands, the Artec Eva 3D scanner exhibited the highest performance, offering accuracy comparable to the Artec Space Spider, but with the added benefit of being able to scan larger objects.
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Affiliation(s)
- Michele Rudari
- From the Department of Plastic Surgery and Hand Surgery, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
- Department of Plastic Surgery and Hand Surgery, Else Kröner Fresenius Center for Digital Health, Technische Universität Dresden, Dresden, Germany
| | - Joseph Breuer
- Department of Plastic Surgery and Hand Surgery, Else Kröner Fresenius Center for Digital Health, Technische Universität Dresden, Dresden, Germany
- Department of Plastic Surgery and Hand Surgery, Fraunhofer Institute for Material and Beam Technology IWS, Dresden, Germany
| | - Hannes Lauer
- Department of Plastic Surgery and Hand Surgery, Else Kröner Fresenius Center for Digital Health, Technische Universität Dresden, Dresden, Germany
- Department of Plastic Surgery and Hand Surgery, Fraunhofer Institute for Material and Beam Technology IWS, Dresden, Germany
| | - Lukas Stepien
- Department of Plastic Surgery and Hand Surgery, Else Kröner Fresenius Center for Digital Health, Technische Universität Dresden, Dresden, Germany
- Department of Plastic Surgery and Hand Surgery, Fraunhofer Institute for Material and Beam Technology IWS, Dresden, Germany
| | - Elena Lopez
- Department of Plastic Surgery and Hand Surgery, Else Kröner Fresenius Center for Digital Health, Technische Universität Dresden, Dresden, Germany
- Department of Plastic Surgery and Hand Surgery, Fraunhofer Institute for Material and Beam Technology IWS, Dresden, Germany
| | - Adrian Dragu
- From the Department of Plastic Surgery and Hand Surgery, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
- Department of Plastic Surgery and Hand Surgery, Else Kröner Fresenius Center for Digital Health, Technische Universität Dresden, Dresden, Germany
| | - Seyed A. Alawi
- From the Department of Plastic Surgery and Hand Surgery, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
- Department of Plastic Surgery and Hand Surgery, Else Kröner Fresenius Center for Digital Health, Technische Universität Dresden, Dresden, Germany
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Yu H, Hu Y, Kang G, Peng X, Chen B, Wu S. High-cycle fatigue life prediction of L-PBF AlSi10Mg alloys: a domain knowledge-guided symbolic regression approach. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2024; 382:20220383. [PMID: 37980935 DOI: 10.1098/rsta.2022.0383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 07/27/2023] [Indexed: 11/21/2023]
Abstract
The large scatter in high-cycle fatigue (HCF) life poses significant challenges to safe and reliable in-service assessment of additively manufactured metal components. Previous investigations have indicated that inherent manufacturing defects are a critical factor affecting the fatigue performance of the components, and the HCF life is significantly influenced by the geometric parameters of the critical defects inducing crack nucleation. Therefore, it is highly important to elucidate the correlation of the HCF life with the geometric parameters of critical defects. This study proposes a new fatigue life prediction model for laser additively manufactured AlSi10Mg alloys by including the combined effects of loading stress and defect geometries (size, location and morphology) in terms of domain knowledge-guided symbolic regression (SR). Domain knowledge is extracted from the semi-empirical Murakami, Z-parameter and X-parameter fatigue life models to establish the variable subtrees. The results show that compared with these semi-empirical models, the domain knowledge integration-based SR model has higher prediction accuracy and generalization ability. Moreover, compared with traditional 'black box' machine learning models, SR excels at balancing prediction accuracy and model interpretability, which provides useful insights into the relationship between fatigue life and defect geometries. This article is part of the theme issue 'Physics-informed machine learning and its structural integrity applications (Part 2)'.
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Affiliation(s)
- Huan Yu
- School of Mechanics and Aerospace Engineering, Southwest Jiaotong University, Chengdu 611756, People's Republic of China
| | - Yanan Hu
- School of Mechanics and Aerospace Engineering, Southwest Jiaotong University, Chengdu 611756, People's Republic of China
| | - Guozheng Kang
- School of Mechanics and Aerospace Engineering, Southwest Jiaotong University, Chengdu 611756, People's Republic of China
| | - Xin Peng
- State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu 610031, People's Republic of China
| | - Bingqing Chen
- Bejing Institute of Aeronautical Materials, Beijing 100095,People's Republic of China
| | - Shengchuan Wu
- School of Mechanics and Aerospace Engineering, Southwest Jiaotong University, Chengdu 611756, People's Republic of China
- State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu 610031, People's Republic of China
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Liu L, Wu J, Lv S, Xu D, Li S, Hou W, Wang C, Yu D. Synergistic effect of hierarchical topographic structure on 3D-printed Titanium scaffold for enhanced coupling of osteogenesis and angiogenesis. Mater Today Bio 2023; 23:100866. [PMID: 38149019 PMCID: PMC10750103 DOI: 10.1016/j.mtbio.2023.100866] [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: 08/15/2023] [Revised: 10/15/2023] [Accepted: 11/11/2023] [Indexed: 12/28/2023] Open
Abstract
The significance of the osteogenesis-angiogenesis relationship in the healing process of bone defects has been increasingly emphasized in recent academic research. Surface topography plays a crucial role in guiding cellular behaviors. Metal-organic framework (MOF) is an innovative biomaterial with nanoscale structural and topological features, enabling the modulation of scaffold physicochemical properties. This study involved the loading of varying quantities of UiO-66 nanocrystals onto alkali-heat treated 3D-printed titanium scaffolds, resulting in the formation of hierarchical micro/nano topography named UiO-66/AHTs. The physicochemical properties of these scaffolds were subsequently characterized. Furthermore, the impact of these scaffolds on the osteogenic potential of BMSCs, the angiogenic potential of HUVECs, and their intercellular communication were investigated. The findings of this study indicated that 1/2UiO-66/AHT outperformed other groups in terms of osteogenic and angiogenic induction, as well as in promoting intercellular crosstalk by enhancing paracrine effects. These results suggest a promising biomimetic hierarchical topography design that facilitates the coupling of osteogenesis and angiogenesis.
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Affiliation(s)
- Leyi Liu
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, 510055, China
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, 510055, China
| | - Jie Wu
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, 510055, China
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, 510055, China
| | - Shiyu Lv
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, 510055, China
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, 510055, China
| | - Duoling Xu
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, 510055, China
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, 510055, China
| | - Shujun Li
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Wentao Hou
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Chao Wang
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, 510055, China
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, 510055, China
| | - Dongsheng Yu
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, 510055, China
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, 510055, China
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Asbai-Ghoudan R, Nasello G, Pérez MÁ, Verbruggen SW, Ruiz de Galarreta S, Rodriguez-Florez N. In silico assessment of the bone regeneration potential of complex porous scaffolds. Comput Biol Med 2023; 165:107381. [PMID: 37611419 DOI: 10.1016/j.compbiomed.2023.107381] [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: 04/28/2023] [Revised: 07/21/2023] [Accepted: 08/14/2023] [Indexed: 08/25/2023]
Abstract
Mechanical environment plays a crucial role in regulating bone regeneration in bone defects. Assessing the mechanobiological behavior of patient-specific orthopedic scaffolds in-silico could help guide optimal scaffold designs, as well as intra- and post-operative strategies to enhance bone regeneration and improve implant longevity. Additively manufactured porous scaffolds, and specifically triply periodic minimal surfaces (TPMS), have shown promising structural properties to act as bone substitutes, yet their ability to induce mechanobiologially-driven bone regeneration has not been elucidated. The aim of this study is to i) explore the bone regeneration potential of TPMS scaffolds made of different stiffness biocompatible materials, to ii) analyze the influence of pre-seeding the scaffolds and increasing the post-operative resting period, and to iii) assess the influence of patient-specific parameters, such as age and mechanosensitivity, on outcomes. To perform this study, an in silico model of a goat tibia is used. The bone ingrowth within the scaffold pores was simulated with a mechano-driven model of bone regeneration. Results showed that the scaffold's architectural properties affect cellular diffusion and strain distribution, resulting in variations in the regenerated bone volume and distribution. The softer material improved the bone ingrowth. An initial resting period improved the bone ingrowth but not enough to reach the scaffold's core. However, this was achieved with the implantation of a pre-seeded scaffold. Physiological parameters like age and health of the patient also influence the bone regeneration outcome, though to a lesser extent than the scaffold design. This analysis demonstrates the importance of the scaffold's geometry and its material, and highlights the potential of using mechanobiological patient-specific models in the design process for bone substitutes.
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Affiliation(s)
- Reduan Asbai-Ghoudan
- Department of Mechanical Engineering and Materials, Universidad de Navarra, TECNUN Escuela de Ingenieros, Paseo Manuel de Lardizabal, 13, 20018, San Sebastian, Spain.
| | - Gabriele Nasello
- Prometheus Division of Skeletal Tissue Engineering, KU Leuven, O&N1, Herestraat 49, PB 813, 3000, Leuven, Belgium
| | - María Ángeles Pérez
- Multiscale in Mechanical and Biological Engineering, Instituto de Investigación en Ingeniería de Aragón (I3A), Instituto de Investigación Sanitaria Aragón (IIS Aragón), University of Zaragoza, 50018, Zaragoza, Spain
| | - Stefaan W Verbruggen
- Centre for Bioengineering, School of Engineering and Materials Science, Queen Mary University of London, London, E1 4NS, UK; Department of Mechanical Engineering and INSIGNEO Institute for in Silico Medicine, University of Sheffield, Sheffield, S1 3JD, UK
| | - Sergio Ruiz de Galarreta
- Department of Mechanical Engineering and Materials, Universidad de Navarra, TECNUN Escuela de Ingenieros, Paseo Manuel de Lardizabal, 13, 20018, San Sebastian, Spain
| | - Naiara Rodriguez-Florez
- Department of Mechanical Engineering and Materials, Universidad de Navarra, TECNUN Escuela de Ingenieros, Paseo Manuel de Lardizabal, 13, 20018, San Sebastian, Spain; IKERBASQUE, Basque Foundation for Science, Plaza Euskadi 5, 48009, Bilbao, Spain
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Meng M, Wang J, Huang H, Liu X, Zhang J, Li Z. 3D printing metal implants in orthopedic surgery: Methods, applications and future prospects. J Orthop Translat 2023; 42:94-112. [PMID: 37675040 PMCID: PMC10480061 DOI: 10.1016/j.jot.2023.08.004] [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: 05/21/2023] [Revised: 07/28/2023] [Accepted: 08/02/2023] [Indexed: 09/08/2023] Open
Abstract
Background Currently, metal implants are widely used in orthopedic surgeries, including fracture fixation, spinal fusion, joint replacement, and bone tumor defect repair. However, conventional implants are difficult to be customized according to the recipient's skeletal anatomy and defect characteristics, leading to difficulties in meeting the individual needs of patients. Additive manufacturing (AM) or three-dimensional (3D) printing technology, an advanced digital fabrication technique capable of producing components with complex and precise structures, offers opportunities for personalization. Methods We systematically reviewed the literature on 3D printing orthopedic metal implants over the past 10 years. Relevant animal, cellular, and clinical studies were searched in PubMed and Web of Science. In this paper, we introduce the 3D printing method and the characteristics of biometals and summarize the properties of 3D printing metal implants and their clinical applications in orthopedic surgery. On this basis, we discuss potential possibilities for further generalization and improvement. Results 3D printing technology has facilitated the use of metal implants in different orthopedic procedures. By combining medical images from techniques such as CT and MRI, 3D printing technology allows the precise fabrication of complex metal implants based on the anatomy of the injured tissue. Such patient-specific implants not only reduce excessive mechanical strength and eliminate stress-shielding effects, but also improve biocompatibility and functionality, increase cell and nutrient permeability, and promote angiogenesis and bone growth. In addition, 3D printing technology has the advantages of low cost, fast manufacturing cycles, and high reproducibility, which can shorten patients' surgery and hospitalization time. Many clinical trials have been conducted using customized implants. However, the use of modeling software, the operation of printing equipment, the high demand for metal implant materials, and the lack of guidance from relevant laws and regulations have limited its further application. Conclusions There are advantages of 3D printing metal implants in orthopedic applications such as personalization, promotion of osseointegration, short production cycle, and high material utilization. With the continuous learning of modeling software by surgeons, the improvement of 3D printing technology, the development of metal materials that better meet clinical needs, and the improvement of laws and regulations, 3D printing metal implants can be applied to more orthopedic surgeries. The translational potential of this paper Precision, intelligence, and personalization are the future direction of orthopedics. It is reasonable to believe that 3D printing technology will be more deeply integrated with artificial intelligence, 4D printing, and big data to play a greater role in orthopedic metal implants and eventually become an important part of the digital economy. We aim to summarize the latest developments in 3D printing metal implants for engineers and surgeons to design implants that more closely mimic the morphology and function of native bone.
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Affiliation(s)
- Meng Meng
- Department of Orthopedics, First Affiliated Hospital of Dalian Medical University, Dalian, PR China
- Key Laboratory of Molecular Mechanism for Repair and Remodeling of Orthopedic Diseases, Liaoning Province, PR China
| | - Jinzuo Wang
- Department of Orthopedics, First Affiliated Hospital of Dalian Medical University, Dalian, PR China
- Key Laboratory of Molecular Mechanism for Repair and Remodeling of Orthopedic Diseases, Liaoning Province, PR China
| | - Huagui Huang
- Department of Orthopedics, First Affiliated Hospital of Dalian Medical University, Dalian, PR China
- Key Laboratory of Molecular Mechanism for Repair and Remodeling of Orthopedic Diseases, Liaoning Province, PR China
| | - Xin Liu
- Department of Orthopedics, First Affiliated Hospital of Dalian Medical University, Dalian, PR China
- Key Laboratory of Molecular Mechanism for Repair and Remodeling of Orthopedic Diseases, Liaoning Province, PR China
| | - Jing Zhang
- Department of Orthopedics, First Affiliated Hospital of Dalian Medical University, Dalian, PR China
- Key Laboratory of Molecular Mechanism for Repair and Remodeling of Orthopedic Diseases, Liaoning Province, PR China
| | - Zhonghai Li
- Department of Orthopedics, First Affiliated Hospital of Dalian Medical University, Dalian, PR China
- Key Laboratory of Molecular Mechanism for Repair and Remodeling of Orthopedic Diseases, Liaoning Province, PR China
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Lim KS, Zreiqat H, Gawlitta D. Special issue: Biofabrication for Orthopedic, Maxillofacial, and Dental Applications. Acta Biomater 2023; 156:1-3. [PMID: 36639170 DOI: 10.1016/j.actbio.2022.12.064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Khoon S Lim
- School of Medical Sciences, The University of Sydney, NSW 2006, Australia; Department of Orthopedic Surgery and Musculoskeletal Medicine, University of Otago Christchurch, Christchurch 8011, New Zealand
| | - Hala Zreiqat
- School of Biomedical Engineering, The University of Sydney, NSW 2006, Australia
| | - Debby Gawlitta
- Department of Oral and Maxillofacial Surgery & Special Dental Care, University Medical Center Utrecht, Utrecht University, Utrecht, 3508 GA, The Netherlands; Regenerative Medicine Center Utrecht, Utrecht, 3584 CT, The Netherlands
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10
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Fouly A, Assaifan AK, Alnaser IA, Hussein OA, Abdo HS. Evaluating the Mechanical and Tribological Properties of 3D Printed Polylactic-Acid (PLA) Green-Composite for Artificial Implant: Hip Joint Case Study. Polymers (Basel) 2022; 14:polym14235299. [PMID: 36501692 PMCID: PMC9738854 DOI: 10.3390/polym14235299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 11/30/2022] [Accepted: 12/01/2022] [Indexed: 12/11/2022] Open
Abstract
Artificial implants are very essential for the disabled as they are utilized for bone and joint function in orthopedics. However, materials used in such implants suffer from restricted mechanical and tribological properties besides the difficulty of using such materials with complex structures. The current study works on developing a new polymer green composite that can be used for artificial implants and allow design flexibility through its usage with 3D printing technology. Therefore, a natural filler extracted from corn cob (CC) was prepared, mixed homogeneously with the Polylactic-acid (PLA), and passed through a complete process to produce a green composite filament suit 3D printer. The corn cob particles were incorporated with PLA with different weight fractions zero, 5%, 10%, 15%, and 20%. The physical, mechanical, and tribological properties of the PLA-CC composites were evaluated. 3D finite element models were constructed to evaluate the PLA-CC composites performance on a real condition implant, hip joints, and through the frictional process. Incorporating corn cob inside PLA revealed an enhancement in the hardness (10%), stiffness (6%), compression ultimate strength (12%), and wear resistance (150%) of the proposed PLA-CC composite. The finite element results of both models proved an enhancement in the load-carrying capacity of the composite. The finite element results came in line with the experimental results.
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Affiliation(s)
- Ahmed Fouly
- Department of Production Engineering and Mechanical Design, Faculty of Engineering, Minia University, Minia 61519, Egypt
- Mechanical Engineering Department, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia
- Correspondence:
| | - Abdulaziz K. Assaifan
- King Abdullah Institute for Nanotechnology, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
- Biomedical Technology Department, College of Applied Medical Sciences, King Saud University, Riyadh 12372, Saudi Arabia
| | - Ibrahim A. Alnaser
- Mechanical Engineering Department, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia
- Center of Excellence for Research in Engineering Materials (CEREM), King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
| | - Omar A. Hussein
- Mechanical Engineering Department, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia
| | - Hany S. Abdo
- Center of Excellence for Research in Engineering Materials (CEREM), King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
- Mechanical Design and Materials Department, Faculty of Energy Engineering, Aswan University, Aswan 81521, Egypt
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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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