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Sui P, Yu T, Sun S, Chao B, Qin C, Wang J, Wang E, Zheng C. Advances in materials used for minimally invasive treatment of vertebral compression fractures. Front Bioeng Biotechnol 2023; 11:1303678. [PMID: 37954022 PMCID: PMC10634476 DOI: 10.3389/fbioe.2023.1303678] [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: 09/28/2023] [Accepted: 10/16/2023] [Indexed: 11/14/2023] Open
Abstract
Vertebral compression fractures are becoming increasingly common with aging of the population; minimally invasive materials play an essential role in treating these fractures. However, the unacceptable processing-performance relationships of materials and their poor osteoinductive performance have limited their clinical application. In this review, we describe the advances in materials used for minimally invasive treatment of vertebral compression fractures and enumerate the types of bone cement commonly used in current practice. We also discuss the limitations of the materials themselves, and summarize the approaches for improving the characteristics of bone cement. Finally, we review the types and clinical efficacy of new vertebral implants. This review may provide valuable insights into newer strategies and methods for future research; it may also improve understanding on the application of minimally invasive materials for the treatment of vertebral compression fractures.
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Affiliation(s)
| | | | | | | | | | | | | | - Changjun Zheng
- Orthopaedic Medical Center, Second Hospital of Jilin University, Changchun, China
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2
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Karpiński R, Szabelski J, Krakowski P, Jojczuk M, Jonak J, Nogalski A. Evaluation of the Effect of Selected Physiological Fluid Contaminants on the Mechanical Properties of Selected Medium-Viscosity PMMA Bone Cements. MATERIALS 2022; 15:ma15062197. [PMID: 35329650 PMCID: PMC8951357 DOI: 10.3390/ma15062197] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 03/10/2022] [Accepted: 03/15/2022] [Indexed: 02/06/2023]
Abstract
Revision surgeries several years after the implantation of the prosthesis are unfavorable from the patient’s point of view as they expose him to additional discomfort, to risk of complications and are expensive. One of the factors responsible for the aseptic loosening of the prosthesis is the gradual degradation of the cement material as a result of working under considerable loads, in an aggressive environment of the human body. Contaminants present in the surgical field may significantly affect the durability of the bone cement and, consequently, of the entire bone-cement-prosthesis system. The paper presents the results of an analysis of selected mechanical properties of two medium-viscosity bone cements DePuy CMW3 Gentamicin and Heraeus Palamed, for the samples contaminated with saline and blood in the range of 1–10%. The results obtained for compressive strength and modulus of elasticity were subjected to statistical analysis, which estimated the nature of changes in these parameters depending on the amount and type of contamination and their statistical significance.
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Affiliation(s)
- Robert Karpiński
- Department of Machine Design and Mechatronics, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland;
- Correspondence: (R.K.); (J.S.)
| | - Jakub Szabelski
- Section of Biomedical Engineering, Department of Computerization and Production Robotization, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland
- Correspondence: (R.K.); (J.S.)
| | - Przemysław Krakowski
- Department of Trauma Surgery and Emergency Medicine, Medical University of Lublin, Staszica 11, 20-081 Lublin, Poland; (P.K.); (M.J.); (A.N.)
- Orthopaedic Department, Łęczna Hospital, Krasnystawska 52, 21-010 Leczna, Poland
| | - Mariusz Jojczuk
- Department of Trauma Surgery and Emergency Medicine, Medical University of Lublin, Staszica 11, 20-081 Lublin, Poland; (P.K.); (M.J.); (A.N.)
| | - Józef Jonak
- Department of Machine Design and Mechatronics, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland;
| | - Adam Nogalski
- Department of Trauma Surgery and Emergency Medicine, Medical University of Lublin, Staszica 11, 20-081 Lublin, Poland; (P.K.); (M.J.); (A.N.)
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3
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Effect of Physiological Saline Solution Contamination on Selected Mechanical Properties of Seasoned Acrylic Bone Cements of Medium and High Viscosity. MATERIALS 2020; 14:ma14010110. [PMID: 33383870 PMCID: PMC7796448 DOI: 10.3390/ma14010110] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 12/18/2020] [Accepted: 12/21/2020] [Indexed: 12/29/2022]
Abstract
Bone cements play a key role in present-day surgery, including the implantation of hip and knee joint endoprostheses. The correct and durable bonding of the prosthesis to the bone is affected by both the static strength characteristics determined in accordance with ISO 5833:2002 and the resistance to long-term exposure to an aggressive environment of the human body and the impurities that may be introduced into the cement during implementation. The study attempts to demonstrate statistically significant degradation of cement as a result of the seasoning of cement samples in Ringer’s solution with simultaneous contamination of the material with saline solution, which is usually present in the surgical field (e.g., during the fixing of endoprostheses). The results of statistical analysis showed the nature of changes in compressive strength and microhardness due to seasoning time and degree of contamination.
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4
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Yousefi AM. A review of calcium phosphate cements and acrylic bone cements as injectable materials for bone repair and implant fixation. J Appl Biomater Funct Mater 2020; 17:2280800019872594. [PMID: 31718388 DOI: 10.1177/2280800019872594] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Treatment of bone defects caused by trauma or disease is a major burden on human healthcare systems. Although autologous bone grafts are considered as the gold standard, they are limited in availability and are associated with post-operative complications. Minimally invasive alternatives using injectable bone cements are currently used in certain clinical procedures, such as vertebroplasty and balloon kyphoplasty. Nevertheless, given the high incidence of fractures and pathologies that result in bone voids, there is an unmet need for injectable materials with desired properties for minimally invasive procedures. This paper provides an overview of the most common injectable bone cement materials for clinical use. The emphasis has been placed on calcium phosphate cements and acrylic bone cements, while enabling the readers to compare the opportunities and challenges for these two classes of bone cements. This paper also briefly reviews antibiotic-loaded bone cements used in bone repair and implant fixation, including their efficacy and cost for healthcare systems. A summary of the current challenges and recommendations for future directions has been brought in the concluding section of this paper.
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Affiliation(s)
- Azizeh-Mitra Yousefi
- Department of Chemical, Paper and Biomedical Engineering, Miami University, Oxford, OH, USA
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5
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Karpiński R, Szabelski J, Maksymiuk J. Effect of Physiological Fluids Contamination on Selected Mechanical Properties of Acrylate Bone Cement. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E3963. [PMID: 31795371 PMCID: PMC6926979 DOI: 10.3390/ma12233963] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 11/23/2019] [Accepted: 11/26/2019] [Indexed: 12/27/2022]
Abstract
This study analyses the degradation rate of selected mechanical properties of bone cement contaminated with human blood and saline solution. During the polymerisation stage, the PMMA cement specimens were supplemented with the selected physiological fluids in a range of concentrations from 0% to 10%. The samples were then subjected to the standardised compression tests, as per ISO 5833: 2002, and hardness tests. The obtained results were analysed statistically to display the difference in the degradation of the material relative to the degree of contamination. Subsequently, numerical modelling was employed to determine the mathematical relationship between the degree of contamination and the material strength degradation rate. The introduction of various concentrations of contaminants into the cement mass resulted in a statistically significant change in their compressive strength. It was shown that the addition of more than 4% of saline and more than 6% of blood (by weight) causes that the specimens exhibit lower strength than the minimum critical value of 70 MPa, specified in the abovementioned International Standard. It was further revealed that the cement hardness characteristics degraded accordingly. The mathematical models showed a very good fit with the results from the experiments: The coefficient of determination R2 was 0.987 in the case of the linear hardness model for blood and 0.983 for salt solution; secondly, the values of R2 for the third-degree polynomial model of compressive strength were 0.88 for blood and 0.92 for salt. From the results, it can be seen that there is a quantitative/qualitative relationship between the contamination rate and the drop in the tested mechanical characteristics. Therefore, great effort must be taken to minimise the contact of the bone cement with physiological fluids, which naturally occur in the operative field, particularly when the material cures, in order to prevent the cement material strength declining below the minimum threshold specified in the ISO standard.
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Affiliation(s)
- Robert Karpiński
- Department of Machine Design and Mechatronics, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland
| | - Jakub Szabelski
- Section of Biomedical Engineering, Department of Computerization and Production Robotization, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland
| | - Jacek Maksymiuk
- Orthopaedic Department, Łęczna Hospital, Krasnystawska 52, 21-010 Łęczna, Poland
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6
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Wang C, Yu B, Fan Y, Ormsby RW, McCarthy HO, Dunne N, Li X. Incorporation of multi-walled carbon nanotubes to PMMA bone cement improves cytocompatibility and osseointegration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 103:109823. [DOI: 10.1016/j.msec.2019.109823] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 05/04/2019] [Accepted: 05/27/2019] [Indexed: 02/07/2023]
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Komang-Agung IS, Hydravianto L, Sindrawati O, William PS. Effect of Polymethylmethacrylate-Hydroxyapatite Composites on Callus Formation and Compressive Strength in Goat Vertebral Body. Malays Orthop J 2018; 12:6-13. [PMID: 30555640 PMCID: PMC6287135 DOI: 10.5704/moj.1811.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Introduction: Percutaneous vertebroplasty (PV) is one of the available treatments for vertebral compression fracture (VCF). Polymethylmethacrylate (PMMA) is the most common bone substitute used in the procedure, but it has several disadvantages. Bioceramic material, such as hydroxyapatite (HA), has better biological activity compared to PMMA. The aim of this study was to find an optimal biomaterial compound which offers the best mechanical and biological properties to be used in PV. Materials and Methods: This was an experimental study with goat (Capra aegagrus hircus) as an animal model. The animals’ vertebral columns were injected with PMMA-HA compound. Animal samples were divided into four groups, and each group received a different proportion of PMMA:HA compound. The mechanical and biological effects of the compound on the bone were then analysed. The mechanical effect was assessed by measuring the vertebral body’s compressive strength. Meanwhile, the biological effect was assessed by analysing the callus formation in the vertebral body. Results: The optimal callus formation and compressive strength was observed in the group receiving PMMA:HA with a 1:2 ratio. Conclusion: A mixture of PMMA and HA increases the quality of callus formation and the material’s compressive strength. The optimum ratio of PMMA:HA in the compound is 1:2.
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Affiliation(s)
- I S Komang-Agung
- Department of Orthopaedics, Airlangga University, Surabaya, Indonesia
| | - L Hydravianto
- Department of Orthopaedics, Airlangga University, Surabaya, Indonesia
| | - O Sindrawati
- Department of Pathology, Widya Mandala Katholic University, Surabaya, Indonesia
| | - P S William
- *Emergency Room Department, Jombang General Hospital, Jombang, Indonesia
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8
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Zadeh MHR, Seifi M, Abdolrahimi M, Hadavi M. A comprehensive
in vitro
study of the carbon nanotube enhanced chitosan scaffolds for cancellous bone regeneration. Biomed Phys Eng Express 2018. [DOI: 10.1088/2057-1976/aab677] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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9
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Aghyarian S, Hu X, Haddas R, Lieberman IH, Kosmopoulos V, Kim HKW, Rodrigues DC. Biomechanical behavior of novel composite PMMA-CaP bone cements in an anatomically accurate cadaveric vertebroplasty model. J Orthop Res 2017; 35:2067-2074. [PMID: 27891670 DOI: 10.1002/jor.23491] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 11/18/2016] [Indexed: 02/04/2023]
Abstract
Vertebral compression fractures are caused by many factors including trauma and osteoporosis. Osteoporosis induced fractures are a result of loss in bone mass and quality that weaken the vertebral body. Vertebroplasty and kyphoplasty, involving cement augmentation of fractured vertebrae, show promise in restoring vertebral mechanical properties. Some complications however, are reported due to the performance characteristics of commercially available bone cements. In this study, the biomechanical performance characteristics of two novel composite (PMMA-CaP) bone cements were studied using an anatomically accurate human cadaveric vertebroplasty model. The study involves mechanical testing on two functional cadaveric spinal unit (2FSU) segments which include monotonic compression and cyclical fatigue tests, treatment by direct cement injection, and microscopic visualization of sectioned vertebrae. The 2FSU segments were fractured, treated, and mechanically tested to investigate the stability provided by two novel bone cements; using readily available commercial acrylic cement as a control. Segment height and stiffness were tracked during the study to establish biomechanical performance. The 2FSU segments were successfully stabilized with all three cement groups. Stiffness values were restored to initial levels following fatigue loading. Cement interdigitation was observed with all cement groups. This study demonstrates efficient reinforcement of the fractured vertebrae through stiffness restoration. The pre-mixed composite cements were comparable to the commercial cement in their performance and interdigitative ability, thus holding promise for future clinical use. © 2016 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:2067-2074, 2017.
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Affiliation(s)
- Shant Aghyarian
- Biomaterials for Osseointegration and Novel Engineering Laboratory (BONE Lab), Department of Bioengineering, University of Texas at Dallas, Richardson, Texas, 75080
| | - Xiaobang Hu
- Scoliosis and Spine Tumor Center, Texas Back Institute, Texas Health Plano Hospital, Plano, Texas, 75093
| | - Ram Haddas
- Texas Back Institute Research Foundation, Plano, Texas, 75093
| | - Isador H Lieberman
- Scoliosis and Spine Tumor Center, Texas Back Institute, Texas Health Plano Hospital, Plano, Texas, 75093
| | - Victor Kosmopoulos
- Department of Orthopaedic Surgery, University of North Texas Health Science Center (UNTHSC), Fort Worth, Texas, 76107.,Department of Materials Science and Engineering, University of North Texas, Denton, Texas, 76203
| | - Harry K W Kim
- Center of Excellence in Hip Disorders, Texas Scottish Rite Hospital for Children, 2222 Welborn Street, Dallas, Texas, 75219.,Department of Orthopaedic Surgery, UT Southwestern Medical Center, Dallas, Texas, 75390
| | - Danieli C Rodrigues
- Biomaterials for Osseointegration and Novel Engineering Laboratory (BONE Lab), Department of Bioengineering, University of Texas at Dallas, Richardson, Texas, 75080
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10
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Kuznetsov V, Yanovska A, Stanislavov A, Danilchenko S, Kalinkevich A, Sukhodub L. Controllability of brushite structural parameters using an applied magnetic field. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 60:547-553. [DOI: 10.1016/j.msec.2015.11.066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 10/20/2015] [Accepted: 11/23/2015] [Indexed: 10/22/2022]
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11
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Shuai C, Zhou J, Wu P, Gao C, Feng P, Xiao T, Deng Y, Peng S. Enhanced Stability of Calcium Sulfate Scaffolds with 45S5 Bioglass for Bone Repair. MATERIALS (BASEL, SWITZERLAND) 2015; 8:7498-7510. [PMID: 28793652 PMCID: PMC5458930 DOI: 10.3390/ma8115398] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 10/29/2015] [Accepted: 11/02/2015] [Indexed: 11/17/2022]
Abstract
Calcium sulfate (CaSO₄), as a promising tissue repair material, has been applied widely due to its outstanding bioabsorbability and osteoconduction. However, fast disintegration, insufficient mechanical strength and poor bioactivity have limited its further application. In the study, CaSO₄ scaffolds fabricated by using selective laser sintering were improved by adding 45S5 bioglass. The 45S5 bioglass enhanced stability significantly due to the bond effect of glassy phase between the CaSO₄ grains. After immersing for four days in simulated body fluid (SBF), the specimens with 45S5 bioglass could still retain its original shape compared as opposed to specimens without 45S5 bioglass who experienced disintegration. Meanwhile, its compressive strength and fracture toughness increased by 80% and 37%, respectively. Furthermore, the apatite layer was formed on the CaSO₄ scaffolds with 45S5 bioglass in SBF, indicating good bioactivity of the scaffolds. In addition, the scaffolds showed good ability to support the osteoblast-like cell adhesion and proliferation.
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Affiliation(s)
- Cijun Shuai
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
| | - Jianhua Zhou
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
| | - Ping Wu
- College of Chemistry, Xiangtan University, Xiangtan 411105, China.
| | - Chengde Gao
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
| | - Pei Feng
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
| | - Tao Xiao
- Department of Orthopedics, the Second Xiangya Hospital, Central South University, Changsha 410011, China.
| | - Youwen Deng
- Department of Orthopedics, the Second Xiangya Hospital, Central South University, Changsha 410011, China.
| | - Shuping Peng
- School of Basic Medical Science, Central South University, Changsha 410078, China.
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya School of Medicine, Central South University, Changsha 410013, China.
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12
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A Within-Animal Comparison of Skilled Forelimb Assessments in Rats. PLoS One 2015; 10:e0141254. [PMID: 26506434 PMCID: PMC4624720 DOI: 10.1371/journal.pone.0141254] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 10/06/2015] [Indexed: 11/22/2022] Open
Abstract
A variety of skilled reaching tasks have been developed to evaluate forelimb function in rodent models. The single pellet skilled reaching task and pasta matrix task have provided valuable insight into recovery of forelimb function in models of neurological injury and disease. Recently, several automated measures have been developed to reduce the cost and time burden of forelimb assessment in rodents. Here, we provide a within-subject comparison of three common forelimb assessments to allow direct evaluation of sensitivity and efficiency across tasks. Rats were trained to perform the single pellet skilled reaching task, the pasta matrix task, and the isometric pull task. Once proficient on all three tasks, rats received an ischemic lesion of motor cortex and striatum to impair use of the trained limb. On the second week post-lesion, all three tasks measured a significant deficit in forelimb function. Performance was well-correlated across tasks. By the sixth week post-lesion, only the isometric pull task measured a significant deficit in forelimb function, suggesting that this task is more sensitive to chronic impairments. The number of training days required to reach asymptotic performance was longer for the isometric pull task, but the total experimenter time required to collect and analyze data was substantially lower. These findings suggest that the isometric pull task represents an efficient, sensitive measure of forelimb function to facilitate preclinical evaluation in models of neurological injury and disease.
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13
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Two novel high performing composite PMMA-CaP cements for vertebroplasty: An ex vivo animal study. J Mech Behav Biomed Mater 2015; 50:290-8. [DOI: 10.1016/j.jmbbm.2015.06.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2015] [Revised: 06/16/2015] [Accepted: 06/22/2015] [Indexed: 01/12/2023]
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14
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Biodegradable Materials for Bone Repair and Tissue Engineering Applications. MATERIALS 2015; 8:5744-5794. [PMID: 28793533 PMCID: PMC5512653 DOI: 10.3390/ma8095273] [Citation(s) in RCA: 354] [Impact Index Per Article: 39.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 08/09/2015] [Accepted: 08/24/2015] [Indexed: 12/21/2022]
Abstract
This review discusses and summarizes the recent developments and advances in the use of biodegradable materials for bone repair purposes. The choice between using degradable and non-degradable devices for orthopedic and maxillofacial applications must be carefully weighed. Traditional biodegradable devices for osteosynthesis have been successful in low or mild load bearing applications. However, continuing research and recent developments in the field of material science has resulted in development of biomaterials with improved strength and mechanical properties. For this purpose, biodegradable materials, including polymers, ceramics and magnesium alloys have attracted much attention for osteologic repair and applications. The next generation of biodegradable materials would benefit from recent knowledge gained regarding cell material interactions, with better control of interfacing between the material and the surrounding bone tissue. The next generations of biodegradable materials for bone repair and regeneration applications require better control of interfacing between the material and the surrounding bone tissue. Also, the mechanical properties and degradation/resorption profiles of these materials require further improvement to broaden their use and achieve better clinical results.
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Abstract
Osteoporosis is a serious public health problem affecting hundreds of millions of aged people worldwide, with severe consequences including vertebral fractures that are associated with significant morbidity and mortality. To augment or treat osteoporotic vertebral fractures, a number of surgical approaches including minimally invasive vertebroplasty and kyphoplasty have been developed. However, these approaches face problems and difficulties with efficacy and long-term stability. Recent advances and progress in nanotechnology are opening up new opportunities to improve the surgical procedures for treating osteoporotic vertebral fractures. This article reviews the improvements enabled by new nanomaterials and focuses on new injectable biomaterials like bone cements and surgical instruments for treating vertebral fractures. This article also provides an introduction to osteoporotic vertebral fractures and current clinical treatments, along with the rationale and efficacy of utilizing nanomaterials to modify and improve biomaterials or instruments. In addition, perspectives on future trends with injectable bone cements and surgical instruments enhanced by nanotechnology are provided.
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Affiliation(s)
- Chunxia Gao
- Department of Orthopaedic Surgery and Orthopaedic Institute, First Affiliated Hospital, Soochow University, Suzhou, People’s Republic of China
| | - Donglei Wei
- Department of Orthopaedic Surgery and Orthopaedic Institute, First Affiliated Hospital, Soochow University, Suzhou, People’s Republic of China
| | - Huilin Yang
- Department of Orthopaedic Surgery and Orthopaedic Institute, First Affiliated Hospital, Soochow University, Suzhou, People’s Republic of China
| | - Tao Chen
- Robotics and Microsystems Center, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, People’s Republic of China
| | - Lei Yang
- Department of Orthopaedic Surgery and Orthopaedic Institute, First Affiliated Hospital, Soochow University, Suzhou, People’s Republic of China
- Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing, People’s Republic of China
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16
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Liang Y, Su Z, Yao Y, Zhang N. Preparation of pH Sensitive Pluronic-Docetaxel Conjugate Micelles to Balance the Stability and Controlled Release Issues. MATERIALS 2015; 8:379-391. [PMID: 28787944 PMCID: PMC5455281 DOI: 10.3390/ma8020379] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 01/13/2015] [Indexed: 01/03/2023]
Abstract
A novel polymer-drug conjugate was prepared by the chemical reaction between the copolymer Pluronic P123 and the docetaxel via a pH sensitive hydrazone bond. These pluronic P123-docetaxel (DTX) conjugates (P123-DTX) could form the stable drug-loaded materials that can self-assemble into the defined nano-micelles in aqueous solution because of their obvious amphiphilic property and low critical micelle concentration. The spherical morphology and particle size of the prepared nano-micelles were characterized by transmission electron microscopy and dynamic light scattering, respectively. Moreover, after the introduction of pH sensitive hydrazone bond, P123-DTX micelle showed a pH dependent drug release behavior. At pH 5.0 (in 48 h), the cumulative release amount of DTX were ~84.9%, which is about six times higher than that at pH 7.4. The prepared novel p123-DTX conjugates may offer a great benefit for drug delivery and controlling the drug release.
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Affiliation(s)
- Yanchao Liang
- School of Pharmaceutical Science, Shandong University, 44 Wenhua Xi Road, Ji'nan 250012, Shandong, China.
| | - Zhihui Su
- School of Pharmaceutical Science, Shandong University, 44 Wenhua Xi Road, Ji'nan 250012, Shandong, China.
| | - Yao Yao
- School of Pharmaceutical Science, Shandong University, 44 Wenhua Xi Road, Ji'nan 250012, Shandong, China.
| | - Na Zhang
- School of Pharmaceutical Science, Shandong University, 44 Wenhua Xi Road, Ji'nan 250012, Shandong, China.
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17
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Rodriguez LC, Palmer K, Montagner F, Rodrigues DC. A novel chlorhexidine-releasing composite bone cement: Characterization of antimicrobial effectiveness and cement strength. J BIOACT COMPAT POL 2015. [DOI: 10.1177/0883911514566130] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The addition of calcium phosphate fillers or antimicrobials to bone cements seems to produce inferior materials. In this study, a two-solution bone cement composite was designed for high viscosity and high pseudoplasticity to improve injection and mitigate the risk of extravasation. By pre-mixing these cements, the fillers are incorporated into the matrix and should not detrimentally affect the performance properties. To expand the functionality of this cement system, the addition of bioactive and antimicrobial phases were explored. Brushite and chlorhexidine were used as calcium phosphate filler and the antimicrobial phase, respectively. By controlling the free radical quenching mechanism provided by the chlorhexidine molecule, it was possible to achieve high polymer conversion rates. This phenomenon led to cement strength retention while successfully preventing microbial proliferation in an environment exposed to the cement surface. Based on these results, two-solution cement composite prepared with high concentrations of brushite and chlorhexidine diacetate salt hydrate may provide an attractive bioactive and antimicrobial cement for load-bearing applications.
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Affiliation(s)
- Lucas C Rodriguez
- Department of Bioengineering, University of Texas at Dallas, Richardson, TX, USA
| | - Kelli Palmer
- Department of Molecular and Cell Biology, University of Texas at Dallas, Richardson, TX, USA
| | - Francisco Montagner
- Department of Conservative Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Danieli C Rodrigues
- Department of Bioengineering, University of Texas at Dallas, Richardson, TX, USA
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