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Ghandour S, Hong L, Aramesh M, Persson C. Mechanical characterization and cytocompatibility of linoleic acid modified bone cement for percutaneous cement discoplasty. J Mech Behav Biomed Mater 2024; 158:106662. [PMID: 39096682 DOI: 10.1016/j.jmbbm.2024.106662] [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: 12/12/2023] [Revised: 06/25/2024] [Accepted: 07/20/2024] [Indexed: 08/05/2024]
Abstract
Minimally invasive spine treatments have been sought after for elderly patients with comorbidities suffering from advanced degenerative disc disease. Percutaneous cement discoplasty (PCD) is one such technique where cement is injected into a degenerated disc with a vacuum phenomenon to relieve patients from pain. Adjacent vertebral fractures (AVFs) are however an inherent risk, particularly for osteoporotic patients, due to the high stiffness of the used cements. While low-modulus cements have been developed for vertebroplasty through the addition of linoleic acid, there are no such variations with a high-viscosity base cement, which is likely needed for the discoplasty application. Therefore, a low-modulus polymethyl methacrylate was developed by the addition of 12%vol. linoleic acid to a high-viscosity bone cement (hv-LA-PMMA). Initial experimental validation of the cement was performed by mechanical testing under compression over a period of 24 weeks, after storage in 37 °C phosphate buffer saline (PBS) solution. Furthermore, cement extracts were used to evaluate residual monomer release and the cytotoxicity of hv-LA-PMMA using fibroblastic cells. Relative to the base commercial cement, a significant reduction of Young's modulus and compressive strength of 36% and 42% was observed, respectively. Compression-tension fatigue tests at 5 MPa gave an average fatigue limit of 31,078 cycles. This was higher than another low-modulus cement and comparable to the fatigue properties of the disc annulus tissue. Monomer release tests showed that hv-LA-PMMA had a significantly higher release between 24 h and 7 days compared to the original bone cement, similarly to other low-modulus cements. Also, the control cement showed cytocompatibility at all time points of extract collection for 20-fold dilution, while hv-LA-PMMA only showed the same for extract collections at day 7. However, the 20-fold dilution was needed for both the control and the hv-LA-PMMA extracts to demonstrate more than 70% fibroblast viability at day 7. In conclusion, the mechanical testing showed promise in the use of linoleic acid in combination with a high-viscosity PMMA cement to achieve properties adequate to the application. Further testing and in vivo studies are however required to fully evaluate the mechanical performance and biocompatibility of hv-LA-PMMA for possible future clinical application.
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Affiliation(s)
- Salim Ghandour
- Div. of Biomedical Engineering, Dept. of Materials Science and Engineering, Uppsala University, Sweden
| | - Linglu Hong
- Div. of Biomedical Engineering, Dept. of Materials Science and Engineering, Uppsala University, Sweden
| | - Morteza Aramesh
- Div. of Biomedical Engineering, Dept. of Materials Science and Engineering, Uppsala University, Sweden
| | - Cecilia Persson
- Div. of Biomedical Engineering, Dept. of Materials Science and Engineering, Uppsala University, Sweden.
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Seesala VS, Sheikh L, Basu B, Mukherjee S. Mechanical and Bioactive Properties of PMMA Bone Cement: A Review. ACS Biomater Sci Eng 2024. [PMID: 39240690 DOI: 10.1021/acsbiomaterials.4c00779] [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: 09/08/2024]
Abstract
Over the past few decades, poly(methyl methacrylate) (PMMA) based bone cement has been clinically used extensively in orthopedics for arthroplasty and kyphoplasty, due to its biocompatibility and excellent primary fixation to the host bone. In this focused review, we discuss the use of various fillers and secondary chemical moieties to improve the bioactivity and the physicochemical properties. The viscosity of the PMMA blend formulations and working time are crucial to achieving intimate contact with the osseous tissue, which is highly sensitive to organic or inorganic fillers. Hydroxyapatite as a reinforcement resulted in compromised mechanical properties of the modified cement. The possible mechanisms of the additive- or filler-dependent strengthening or weakening of the PMMA blend are critically reviewed. The addition of layered double hydroxides with surface functionalization appears to be a promising approach to enhance the bonding of filler with the PMMA matrix. Such an approach consequently improves the mechanical properties, owing to enhanced dispersion as well as contributions from crack bridging. Finally, the use of emerging alternatives, such as nanoparticles, and the use of natural biomolecules were highlighted to improve bioactivity and antibacterial properties.
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Affiliation(s)
- Venkata Sundeep Seesala
- Advanced Materials and Characterization Group, Research and Development Division, Tata Steel Ltd, Jamshedpur 831001, India
| | - Lubna Sheikh
- Advanced Materials and Characterization Group, Research and Development Division, Tata Steel Ltd, Jamshedpur 831001, India
| | - Bikramjit Basu
- Laboratory for Biomaterials, Materials Research Centre, Indian Institute of Science, Bengaluru 560012, India
| | - Subrata Mukherjee
- Advanced Materials and Characterization Group, Research and Development Division, Tata Steel Ltd, Jamshedpur 831001, India
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Trivedi Z, Wychowaniec JK, Gehweiler D, Sprecher CM, Boger A, Gueorguiev B, D’Este M, Ricken T, Röhrle O. Rheological Analysis and Evaluation of Measurement Techniques for Curing Poly(Methyl Methacrylate) Bone Cement in Vertebroplasty. ACS Biomater Sci Eng 2024; 10:4575-4586. [PMID: 38839046 PMCID: PMC11235098 DOI: 10.1021/acsbiomaterials.4c00417] [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: 03/02/2024] [Revised: 04/08/2024] [Accepted: 04/09/2024] [Indexed: 06/07/2024]
Abstract
Vertebroplasty is a minimally invasive surgical procedure used to treat vertebral fractures, which conventionally involves injecting poly(methyl methacrylate) (PMMA) bone cement into the fractured vertebra. A common risk associated with vertebroplasty is cement leaking out of the vertebra during the injection, which may occur due to a lack of understanding of the complex flow behavior. Therefore, experiments to quantify the cement's flow properties are necessary for understanding and proper handling of the bone cement. In this study, we aimed to characterize the behavior of PMMA bone cement in its curing stages to obtain parameters that govern the flow behavior during injection. We used rotational and oscillatory rheometry for our measurements, as well as a custom-made injector setup that replicated a typical vertebroplasty setting. Our results showed that the complex viscoelastic behavior of bone cement is significantly affected by deformations and temperature. We found that the results from rotational tests, often used for characterizing the bone cement, are susceptible to measurement artifacts caused by wall slip and "ridge"-like formations in the test sample. We also found the Cox-Merz rule to be conditionally valid, which affects the use of oscillatory tests to obtain the shear-thinning characteristics of bone cement. Our findings identify important differences in the measured flow behavior of PMMA bone cement when assessed by different rheological methods, an understanding that is crucial for its risk-free usage in downstream medical applications.
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Affiliation(s)
- Zubin Trivedi
- Institute
for Modelling and Simulation of Biomechanical Systems, University of Stuttgart, Pfaffenwaldring 5a, 70569 Stuttgart, Germany
- Institute
of Structural Mechanics and Dynamics in Aerospace Engineering, University of Stuttgart, Pfaffenwaldring 27, 70569 Stuttgart, Germany
| | | | - Dominic Gehweiler
- AO
Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | | | - Andreas Boger
- Ansbach
University of Applied Sciences, Residenzstraße 8, 91522 Ansbach, Germany
| | - Boyko Gueorguiev
- AO
Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - Matteo D’Este
- AO
Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - Tim Ricken
- Institute
of Structural Mechanics and Dynamics in Aerospace Engineering, University of Stuttgart, Pfaffenwaldring 27, 70569 Stuttgart, Germany
| | - Oliver Röhrle
- Institute
for Modelling and Simulation of Biomechanical Systems, University of Stuttgart, Pfaffenwaldring 5a, 70569 Stuttgart, Germany
- Stuttgart
Center for Simulation Science (SC SimTech), Pfaffenwaldring 5a, 70569 Stuttgart, Germany
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Ghandour S, Christie I, Öhman Mägi C, Persson C. Quasi-static and dynamic mechanical properties of a linoleic acid-modified, low-modulus bone cement for spinal applications. OPEN RESEARCH EUROPE 2024; 3:203. [PMID: 39185085 PMCID: PMC11344196 DOI: 10.12688/openreseurope.16683.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Accepted: 05/15/2024] [Indexed: 08/27/2024]
Abstract
Background Polymethylmethacrylate (PMMA) bone cement is extensively used in spinal procedures such as vertebroplasty and kyphoplasty, while its use in percutaneous cement discoplasty (PCD) is not yet widely spread. A main issue for both application sites, vertebra and disc, is the mismatch in stiffness between cement and bone, potentially resulting in adjacent vertebral fractures and adjacent segment disease. Tailoring the cement modulus using additives is hence an interesting strategy. However, there is a lack of data on the tensile and tension-compression fatigue properties of these cements, relevant to the newly researched indication of PCD. Method A commercial PMMA cement (VS) was modified with 12%vol of linoleic acid (VSLA) and tested for quasi-static tensile properties. Additionally, tension-compression fatigue testing with amplitudes ranging from +/-5MPa to +/-7MPa and +/-9MPa was performed, and a Weibull three-parameter curve fit was used to calculate the fatigue parameters. Results Quasi-static testing revealed a significant reduction in VSLA's Young's Modulus (E=581.1±126.4MPa) compared to the original cement (E=1478.1±202.9MPa). Similarly, the ultimate tensile stress decreased from 36.6±1.5MPa to 11.6±0.8MPa. Thus, VSLA offers improved compatibility with trabecular bone properties. Fatigue testing of VSLA revealed that as the stress amplitude increased the Weibull mean number decreased from 3591 to 272 and 91 cycles, respectively. In contrast, the base VS cement reached run-out at the highest stress amplitude. However, the lowest stress amplitude used exceeds the pressures recorded in the disc in vivo, and VSLA displayed a similar fatigue life range to that of the annulus fibrosis tissue. Conclusions While the relevance of fully reversed tension-compression fatigue testing can be debated for predicting cement performance in certain spinal applications, the results of this study can serve as a benchmark for comparison of low-modulus cements for the spine. Further investigations are necessary to assess the clinical feasibility and effectiveness of these cements.
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Affiliation(s)
- Salim Ghandour
- Division of Biomedical Engineering, Department of Materials Science and Engineering, Uppsala University, Uppsala, Uppsala County, 75121, Sweden
| | - Iain Christie
- Division of Biomedical Engineering, Department of Materials Science and Engineering, Uppsala University, Uppsala, Uppsala County, 75121, Sweden
- Division of Applied Materials Science, Department of Materials Science and Engineering, Uppsala University, Uppsala, Uppsala County, 75121, Sweden
| | - Caroline Öhman Mägi
- Division of Applied Materials Science, Department of Materials Science and Engineering, Uppsala University, Uppsala, Uppsala County, 75121, Sweden
| | - Cecilia Persson
- Division of Biomedical Engineering, Department of Materials Science and Engineering, Uppsala University, Uppsala, Uppsala County, 75121, Sweden
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Mounika C, Tadge T, Keerthana M, Velyutham R, Kapusetti G. Advancements in poly(methyl Methacrylate) bone cement for enhanced osteoconductivity and mechanical properties in vertebroplasty: A comprehensive review. Med Eng Phys 2023; 120:104049. [PMID: 37838402 DOI: 10.1016/j.medengphy.2023.104049] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/01/2023] [Accepted: 09/04/2023] [Indexed: 10/16/2023]
Abstract
The evolution of polymethyl methacrylate (PMMA) based bone cement (BC) from plexiglass to a biomaterial has revolutionized the joint and vertebral arthroplasties field. This widely used grouting material possesses exceptional properties for medical applications, including excellent biocompatibility, impressive mechanical strength, and favorable handling characteristics. PMMA-based BC is preferred in challenging conditions such as osteoporotic vertebral compression fractures, scoliosis, vertebral hemangiomas, spinal metastases, and myelomas, where it is crucial in withstanding stress. This review aims to comprehensively analyze the available reports and guide further research toward enhanced formulations of vertebral BC, focusing on its osteoconductive and mechanical properties. Furthermore, the review emphasizes the significant impact of BC's mechanical properties and osteoconductivity on the success and longevity of vertebroplasty procedures.
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Affiliation(s)
- Choppadandi Mounika
- National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad, Palaj, Gandhinagar, 382355, India
| | - Tejaswini Tadge
- National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad, Palaj, Gandhinagar, 382355, India
| | - M Keerthana
- National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad, Palaj, Gandhinagar, 382355, India
| | - Ravichandiran Velyutham
- National Institute of Pharmaceutical Education and Research (NIPER)-Kolkata, Bengal Chemicals, Kolkata, 700054, India
| | - Govinda Kapusetti
- National Institute of Pharmaceutical Education and Research (NIPER)-Kolkata, Bengal Chemicals, Kolkata, 700054, India.
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Lei C, Song JH, Li S, Zhu YN, Liu MY, Wan MC, Mu Z, Tay FR, Niu LN. Advances in materials-based therapeutic strategies against osteoporosis. Biomaterials 2023; 296:122066. [PMID: 36842238 DOI: 10.1016/j.biomaterials.2023.122066] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 02/16/2023] [Accepted: 02/18/2023] [Indexed: 02/22/2023]
Abstract
Osteoporosis is caused by the disruption in homeostasis between bone formation and bone resorption. Conventional management of osteoporosis involves systematic drug administration and hormonal therapy. These treatment strategies have limited curative efficacy and multiple adverse effects. Biomaterials-based therapeutic strategies have recently emerged as promising alternatives for the treatment of osteoporosis. The present review summarizes the current status of biomaterials designed for managing osteoporosis. The advantages of biomaterials-based strategies over conventional systematic drug treatment are presented. Different anti-osteoporotic delivery systems are concisely addressed. These materials include injectable hydrogels and nanoparticles, as well as anti-osteoporotic bone tissue engineering materials. Fabrication techniques such as 3D printing, electrostatic spinning and artificial intelligence are appraised in the context of how the use of these adjunctive techniques may improve treatment efficacy. The limitations of existing biomaterials are critically analyzed, together with deliberation of the future directions in biomaterials-based therapies. The latter include discussion on the use of combination strategies to enhance therapeutic efficacy in the osteoporosis niche.
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Affiliation(s)
- Chen Lei
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Jing-Han Song
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Song Li
- School of Stomatology, Xinjiang Medical University. Urumqi 830011, China
| | - Yi-Na Zhu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Ming-Yi Liu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Mei-Chen Wan
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Zhao Mu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China.
| | - Franklin R Tay
- The Dental College of Georgia, Augusta University, Augusta, GA, 30912, USA.
| | - Li-Na Niu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China.
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Tan QC, Jiang XS, Chen L, Huang JF, Zhou QX, Wang J, Zhao Y, Zhang B, Sun YN, Wei M, Zhao X, Yang Z, Lei W, Tang YF, Wu ZX. Bioactive graphene oxide-functionalized self-expandable hydrophilic and osteogenic nanocomposite for orthopaedic applications. Mater Today Bio 2022; 18:100500. [DOI: 10.1016/j.mtbio.2022.100500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 10/30/2022] [Accepted: 11/18/2022] [Indexed: 11/26/2022] Open
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Huddleston SE, Duan C, Ameer GA. Azo polymerization of citrate‐based biomaterial‐ceramic composites at physiological temperatures. NANO SELECT 2022. [DOI: 10.1002/nano.202200080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
| | - Chongwen Duan
- Department of Surgery Feinberg School of Medicine Northwestern University Chicago Illinois USA
| | - Guillermo A. Ameer
- Center for Advanced Regenerative Engineering (CARE) Evanston Illinois USA
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Low-Modulus PMMA Has the Potential to Reduce Stresses on Endplates after Cement Discoplasty. J Funct Biomater 2022; 13:jfb13010018. [PMID: 35225981 PMCID: PMC8883899 DOI: 10.3390/jfb13010018] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 01/20/2022] [Accepted: 01/28/2022] [Indexed: 11/28/2022] Open
Abstract
Cement discoplasty has been developed to treat patients with advanced intervertebral disc degeneration. In discoplasty, poly(methylmethacrylate) (PMMA) bone cement is injected into the disc, leading to reduced pain and certain spinal alignment correction. Standard PMMA-cements have much higher elastic modulus than the surrounding vertebral bone, which may lead to a propensity for adjacent fractures. A PMMA-cement with lower modulus might be biomechanically beneficial. In this study, PMMA-cements with lower modulus were obtained using previously established methods. A commercial PMMA-cement (V-steady®, G21 srl) was used as control, and as base cement. The low-modulus PMMA-cements were modified by 12 vol% (LA12), 16 vol% (LA16) and 20 vol% (LA20) linoleic acid (LA). After storage in 37 °C PBS from 24 h up to 8 weeks, specimens were tested in compression to obtain the material properties. A lower E-modulus was obtained with increasing amount of LA. However, with storage time, the E-modulus increased. Standard and low-modulus PMMA discoplasty were compared in a previously developed and validated computational lumbar spine model. All discoplasty models showed the same trend, namely a substantial reduction in range of motion (ROM), compared to the healthy model. The V-steady model had the largest ROM-reduction (77%), and the LA20 model had the smallest (45%). The average stress at the endplate was higher for all discoplasty models than for the healthy model, but the stresses were reduced for cements with higher amounts of LA. The study indicates that low-modulus PMMA is promising for discoplasty from a mechanical viewpoint. However, validation experiments are needed, and the clinical setting needs to be further considered.
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Chen KJ, Hung FY, Wang YT, Yen CW. Mechanical properties and biomedical application characteristics of degradable polylactic acid-Mg-Ca 3(PO 4) 2 three-phase composite. J Mech Behav Biomed Mater 2021; 125:104949. [PMID: 34736029 DOI: 10.1016/j.jmbbm.2021.104949] [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: 09/16/2021] [Revised: 10/21/2021] [Accepted: 10/25/2021] [Indexed: 11/29/2022]
Abstract
Polylactic acid (PLA), pure magnesium powder, and calcium phosphate powder were used to form a three-phase degradable biomedical composite. The effects of various powder proportions in polylactic acid-Mg-Ca3(PO4)2 composites were analyzed through mechanical and biological tests, which revealed that both the tensile and impact strength of the composite increased. Additionally, ductility presented only after a small proportion of powder was added. Hardness slightly increased because of dispersion strengthening. Furthermore, the addition of pure magnesium and calcium phosphate accelerated the degradation rate, and biocompatible salts were generated after degradation, which can improve healing and renewal in bone tissue. None of the composites exhibited cytotoxicity, meeting biological safety requirements. Overall, PLA10M10C (10 wt.% Mg, 10 wt.% Ca3(PO4)2) exhibited superior performance. Accordingly, PLA10M10C can serve as a reference for degradable biomedical material applications in orthopedic implants.
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Affiliation(s)
- Kuan-Jen Chen
- Department of Mechanical Engineering, Southern Taiwan University of Science and Technology, Tainan, 710, Taiwan.
| | - Fei-Yi Hung
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan, 701, Taiwan.
| | - Yun-Ting Wang
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan, 701, Taiwan
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Guo Y, Liu J, Zhang X, Xing Z, Chen W, Huang D. Structural geometries and mechanical properties of vertebral implant with honeycomb sandwich structure for vertebral compression fractures: a finite element analysis. Biomed Eng Online 2021; 20:96. [PMID: 34600551 PMCID: PMC8487571 DOI: 10.1186/s12938-021-00934-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 09/18/2021] [Indexed: 11/23/2022] Open
Abstract
Background Because of osteoporosis, traffic accidents, falling from high places, and other reasons, the vertebral body can be compressed and even collapse. Vertebral implants can be used for clinical treatment. Because of the advantages of honeycomb sandwich structures, such as low cost, less material, light weight, high strength, and good cushioning performance. In this paper, the honeycomb sandwich structure was used as the basic structure of vertebral implants. Methods The orthogonal experiment method is applied to analyse the size effect of honeycomb sandwich structures by the finite element method. Based on the minimum requirements of three indexes of peak stress, axial deformation, and anterior–posterior deformation, the optimal structure size was determined. Furthermore, through local optimization of the overall structure of the implant, a better honeycomb sandwich structure vertebral implant was designed. Results The optimal structure size combination was determined as a panel thickness of 1 mm, wall thickness if 0.49 mm, cell side length of 1 mm, and height of 6 mm. Through local optimization, the peak stress was further reduced, the overall stress distribution was uniform, and the deformation was reduced. The optimized peak stress decreased to 1.041 MPa, the axial deformation was 0.1110%, and the anterior–posterior deformation was 0.0145%. A vertebral implant with good mechanical performance was designed. Conclusions This paper is the first to investigate vertebral implants with honeycomb sandwich structures. The design and analysis of the vertebral implant with a honeycomb sandwich structure were processed by the finite element method. This research can provide a feasible way to analyse and design clinical implants based on biomechanical principles.
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Affiliation(s)
- Yuan Guo
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Jing Liu
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Xushu Zhang
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, China.
| | - Zejun Xing
- Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Taiyuan, 030032, China
| | - Weiyi Chen
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Di Huang
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
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