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Zhao Y, Wang Z, Zhao J, Hussain M, Wang M. Additive Manufacturing in Orthopedics: A Review. ACS Biomater Sci Eng 2022; 8:1367-1380. [PMID: 35266709 DOI: 10.1021/acsbiomaterials.1c01072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Additive manufacturing is an advanced manufacturing manner that seems like the industrial revolution. It has the inborn benefit of producing complex formations, which are distinct from traditional machining technology. Its manufacturing strategy is flexible, including a wide range of materials, and its manufacturing cycle is short. Additive manufacturing techniques are progressively used in bone research and orthopedic operation as more innovative materials are developed. This Review lists the recent research results, analyzes the strengths and weaknesses of diverse three-dimensional printing strategies in orthopedics, and sums up the use of varying 3D printing strategies in surgical guides, surgical implants, surgical predictive models, and bone tissue engineering. Moreover, various postprocessing methods for additive manufacturing for orthopedics are described.
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Affiliation(s)
- Yingchao Zhao
- Xiangya School of Medicine, Central South University, No.172 Yinpenling Street, Tongzipo Road, Changsha 410013, China
| | - Zhen Wang
- Xiangya School of Medicine, Central South University, No.172 Yinpenling Street, Tongzipo Road, Changsha 410013, China
| | - Jingzhou Zhao
- Department of Chemical & Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
| | - Mubashir Hussain
- Postdoctoral Innovation Practice, Shenzhen Polytechnic, No.4089 Shahe West Road, Xinwei Nanshan District, Shenzhen 518055, China
| | - Maonan Wang
- Department of Chemical & Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
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You Q, Lu M, Min L, Zhang Y, Wang J, Wang Y, Zheng C, Zhou Y, Tu C. Hip-Preserved Reconstruction Using a Customized Cementless Intercalary Endoprosthesis With an Intra-Neck Curved Stem in Patients With an Ultrashort Proximal Femur: Midterm Follow-Up Outcomes. Front Bioeng Biotechnol 2022; 10:795485. [PMID: 35295648 PMCID: PMC8918842 DOI: 10.3389/fbioe.2022.795485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 01/21/2022] [Indexed: 12/24/2022] Open
Abstract
Background: Hemiarthroplasty is widely used for proximal femoral reconstruction after tumor resection. However, complications of hemiarthroplasty include infection, hip dislocation, and acetabular wear. This study aimed to: (1) evaluate the reliability and validity of a customized cementless intercalary endoprosthesis (CCIE) with an intra-neck curved stem (INCS) to reconstruct femoral diaphyseal defects with an ultrashort proximal femur (UPF); (2) assess the lower extremity function after reconstruction with this endoprosthesis; and (3) identify the postoperative complications associated with the use of this endoprosthesis. Methods: Between October 2015 and May 2019, 13 patients underwent reconstruction with a CCIE with an INCS. The distance from the center of the femoral head to the midline of the body and the apex of the acetabulum was measured preoperatively. Additionally, the distance from the tip of the INCS to the midline of the body and the apex of the acetabulum was measured postoperatively. The femoral neck–shaft angle was also measured pre- and postoperatively. After an average follow-up duration of 46 months, the radiological outcomes of the CCIE with an INCS were analyzed. Function was evaluated with the Musculoskeletal Tumor Society (MSTS) score. Pain was measured using a paper visual analog scale (VAS) pre- and postoperatively, and complications were recorded. Results: Compared with our preoperative design, we found no significant difference in the postoperative distance from the tip of the INCS to the body midline (p = 0.187) and the apex of the acetabulum (p = 0.159), or in the postoperative femoral neck–shaft angle (p = 0.793). Thus, the INCS positions were deemed accurate. The average MSTS score was 26 (range: 24–28), and the VAS score was significantly decreased postoperatively compared with preoperatively (p < 0.0001). No patients developed aseptic loosening, infection, periprosthetic fracture, or prosthetic fracture as of the last follow-up. Conclusion: The CCIE with an INCS was a valid and reliable method for reconstructing femoral diaphyseal defects with a UPF following malignant tumor resection. Postoperative lower extremity function was acceptable, with an appropriate individualized rehabilitation program, and the incidence of complications was low.
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Affiliation(s)
- Qi You
- Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China
- Bone and Joint 3D-Printing and Biomechanical Laboratory, Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China
| | - Minxun Lu
- Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China
- Bone and Joint 3D-Printing and Biomechanical Laboratory, Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China
| | - Li Min
- Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China
- Bone and Joint 3D-Printing and Biomechanical Laboratory, Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China
| | - Yuqi Zhang
- Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China
- Bone and Joint 3D-Printing and Biomechanical Laboratory, Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China
| | - Jie Wang
- Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China
- Bone and Joint 3D-Printing and Biomechanical Laboratory, Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China
| | - Yitian Wang
- Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China
- Bone and Joint 3D-Printing and Biomechanical Laboratory, Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China
| | - Chuanxi Zheng
- Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China
- Bone and Joint 3D-Printing and Biomechanical Laboratory, Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China
| | - Yong Zhou
- Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China
- Bone and Joint 3D-Printing and Biomechanical Laboratory, Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China
- *Correspondence: Chongqi Tu, ; Yong Zhou,
| | - Chongqi Tu
- Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China
- Bone and Joint 3D-Printing and Biomechanical Laboratory, Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China
- *Correspondence: Chongqi Tu, ; Yong Zhou,
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Fu J, Xiang Y, Ni M, Qu X, Zhou Y, Hao L, Zhang G, Chen J. In Vivo Reconstruction of the Acetabular Bone Defect by the Individualized Three-Dimensional Printed Porous Augment in a Swine Model. BIOMED RESEARCH INTERNATIONAL 2020; 2020:4542302. [PMID: 33335923 PMCID: PMC7723487 DOI: 10.1155/2020/4542302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 10/14/2020] [Accepted: 11/17/2020] [Indexed: 11/17/2022]
Abstract
METHODS As an acetabular bone defect model created in Bama miniswine, an augment individually fabricated by 3D print technique with Ti6Al4V powders was implanted to repair the defect. Nine swine were divided into three groups, including the immediate biomechanics group, 12-week biomechanics group, and 12-week histological group. The inner structural parameters of the 3D printed porous augment were measured by scanning electron microscopy (SEM), including porosity, pore size, and trabecular diameter. The matching degree between the postoperative augment and the designed augment was assessed by CT scanning and 3D reconstruction. In addition, biomechanical properties, such as stiffness, compressive strength, and the elastic modulus of the 3D printed porous augment, were measured by means of a mechanical testing machine. Moreover, bone ingrowth and implant osseointegration were histomorphometrically assessed. RESULTS In terms of the inner structural parameters of the 3D printed porous augment, the porosity was 55.48 ± 0.61%, pore size 319.23 ± 25.05 μm, and trabecular diameter 240.10 ± 23.50 μm. Biomechanically, the stiffness was 21464.60 ± 1091.69 N/mm, compressive strength 231.10 ± 11.77 MPa, and elastic modulus 5.35 ± 0.23 GPa, respectively. Furthermore, the matching extent between the postoperative augment and the designed one was up to 91.40 ± 2.83%. Besides, the maximal shear strength of the 3D printed augment was 929.46 ± 295.99 N immediately after implantation, whereas the strength was 1521.93 ± 98.38 N 12 weeks after surgery (p = 0.0302). The bone mineral apposition rate (μm per day) 12 weeks post operation was 3.77 ± 0.93 μm/d. The percentage bone volume of new bone was 22.30 ± 4.51% 12 weeks after surgery. CONCLUSION The 3D printed porous Ti6Al4V augment designed in this study was well biocompatible with bone tissue, possessed proper biomechanical features, and was anatomically well matched with the defect bone. Therefore, the 3D printed porous Ti6Al4V augment possesses great potential as an alternative for individualized treatment of severe acetabular bone defects.
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Affiliation(s)
- Jun Fu
- Department of Orthopaedics, The First Medical Centre, Chinese PLA General Hospital, Beijing 100853, China
| | - Yi Xiang
- Department of Orthopaedics, The Logistics Support Forces of Chinese PLA 985 Hospital, Taiyuan, Shanxi 030001, China
| | - Ming Ni
- Department of Orthopaedics, The First Medical Centre, Chinese PLA General Hospital, Beijing 100853, China
| | - Xiaojuan Qu
- Otolaryngological Department, The Logistics Support Forces of Chinese PLA 985 Hospital, Taiyuan, Shanxi 030001, China
| | - Yonggang Zhou
- Department of Orthopaedics, The First Medical Centre, Chinese PLA General Hospital, Beijing 100853, China
| | - Libo Hao
- Department of Orthopaedics, The First Medical Centre, Chinese PLA General Hospital, Beijing 100853, China
| | - Guoqiang Zhang
- Department of Orthopaedics, The First Medical Centre, Chinese PLA General Hospital, Beijing 100853, China
| | - Jiying Chen
- Department of Orthopaedics, The First Medical Centre, Chinese PLA General Hospital, Beijing 100853, China
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Epasto G, Distefano F, Mineo R, Guglielmino E. Subject-specific finite element analysis of a lumbar cage produced by electron beam melting. Med Biol Eng Comput 2019; 57:2771-2781. [PMID: 31741290 DOI: 10.1007/s11517-019-02078-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 11/07/2019] [Indexed: 01/04/2023]
Abstract
The aim of this study was the analysis of the mechanical behaviour of a partially porous lumbar custom-made cage by means of a subject-specific finite element analysis (FEA). The cage, made of Ti6Al4V ELI alloy, was produced via electron beam melting (EBM) process and surgically implanted in a female subject, 50 years old. The novelty of this study was the customized design of the cage and of its internal structure, which is impossible to obtain with the traditional production techniques. The 3D model of the spine was obtained from the computed tomography (CT) of the patient. Moreover, high-resolution industrial CT was also used to reconstruct a 3D model of the cage, with its real (as-produced) features, such as superficial roughness, morphology of the bulk and of the porous structure. The workflow was divided in several steps: the main finite element analyses were non-linear and quasi-static regarding: the rhombic dodecahedron (RD) unit cell of the porous structure; the device; the whole L4-L5 motion segment with the implanted cage. Stress distribution was calculated under compression load for all models. For the RD unit cell, the maximum stress appeared at the connected cross nodes, where notch effect was present. For the cage subjected to a load of 1 kN, the porous structure did not present any functional failure. For the whole biomechanical system subjected to a physiological load of 360 N, the calculated stress in the bone was smaller than its yield strength value. On the axial view, a zone with higher compressive stresses was present on the L5 vertebral body. This was due to the contact stress between the cage and the vertebra. From the comparison between FE results and the CT images of the spine, bone remodelling was supposed, with the formation of new bone. Graphical abstract Workflow showing the phases of the research.
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Affiliation(s)
- Gabriella Epasto
- Department of Engineering, University of Messina, Contrada di Dio, Vill. Sant'Agata, 98166, Messina, Italy.
| | - Fabio Distefano
- Department of Engineering, University of Messina, Contrada di Dio, Vill. Sant'Agata, 98166, Messina, Italy
| | - Rosalia Mineo
- Mt Ortho srl, via fossa lupo sn Aci Sant'Antonio, 95025, Catania, Italy
| | - Eugenio Guglielmino
- Department of Engineering, University of Messina, Contrada di Dio, Vill. Sant'Agata, 98166, Messina, Italy
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