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Emonde CK, Eggers ME, Wichmann M, Hurschler C, Ettinger M, Denkena B. Radiopacity Enhancements in Polymeric Implant Biomaterials: A Comprehensive Literature Review. ACS Biomater Sci Eng 2024; 10:1323-1334. [PMID: 38330191 PMCID: PMC10934286 DOI: 10.1021/acsbiomaterials.3c01667] [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: 11/14/2023] [Revised: 01/17/2024] [Accepted: 01/18/2024] [Indexed: 02/10/2024]
Abstract
Polymers as biomaterials possess favorable properties, which include corrosion resistance, light weight, biocompatibility, ease of processing, low cost, and an ability to be easily tailored to meet specific applications. However, their inherent low X-ray attenuation, resulting from the low atomic numbers of their constituent elements, i.e., hydrogen (1), carbon (6), nitrogen (7), and oxygen (8), makes them difficult to visualize radiographically. Imparting radiopacity to radiolucent polymeric implants is necessary to enable noninvasive evaluation of implantable medical devices using conventional imaging methods. Numerous studies have undertaken this by blending various polymers with contrast agents consisting of heavy elements. The selection of an appropriate contrast agent is important, primarily to ensure that it does not cause detrimental effects to the relevant mechanical and physical properties of the polymer depending upon the intended application. Furthermore, its biocompatibility with adjacent tissues and its excretion from the body require thorough evaluation. We aimed to summarize the current knowledge on contrast agents incorporated into synthetic polymers in the context of implantable medical devices. While a single review was found that discussed radiopacity in polymeric biomaterials, the publication is outdated and does not address contemporary polymers employed in implant applications. Our review provides an up-to-date overview of contrast agents incorporated into synthetic medical polymers, encompassing both temporary and permanent implants. We expect that our results will significantly inform and guide the strategic selection of contrast agents, considering the specific requirements of implantable polymeric medical devices.
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Affiliation(s)
- Crystal Kayaro Emonde
- Laboratory
for Biomechanics and Biomaterials (LBB), Hannover Medical School, Anna-von-Borries-Strasse 1-7, 30625 Hannover, Germany
| | - Max-Enno Eggers
- Institute
of Production Engineering and Machine Tools, Leibniz University Hannover, An der Universität 2, 30823 Garbsen, Hannover, Germany
| | - Marcel Wichmann
- Institute
of Production Engineering and Machine Tools, Leibniz University Hannover, An der Universität 2, 30823 Garbsen, Hannover, Germany
| | - Christof Hurschler
- Laboratory
for Biomechanics and Biomaterials (LBB), Hannover Medical School, Anna-von-Borries-Strasse 1-7, 30625 Hannover, Germany
| | - Max Ettinger
- Department
of Orthopedic Surgery − DIAKOVERE Annastift, Hannover Medical School, Anna-von-Borries-Strasse 1-7, 30625 Hannover, Germany
| | - Berend Denkena
- Institute
of Production Engineering and Machine Tools, Leibniz University Hannover, An der Universität 2, 30823 Garbsen, Hannover, Germany
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Górecka Ż, Choińska E, Heljak M, Święszkowski W. Long-Term In Vitro Assessment of Biodegradable Radiopaque Composites for Fiducial Marker Fabrication. Int J Mol Sci 2022; 23:ijms232214363. [PMID: 36430842 PMCID: PMC9697335 DOI: 10.3390/ijms232214363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 11/04/2022] [Accepted: 11/05/2022] [Indexed: 11/22/2022] Open
Abstract
Biodegradable polymer-based composite materials may be successfully utilised to fabricate fiducial markers (FMs), which are intended to precisely label tumour margins during image-guided surgery or radiotherapy. However, due to matrix degradability, the stability of the functional properties of FMs depends on the chosen polymer. Thus, this study aimed to investigate novel radiopaque composites which varied in the polymeric matrix-polycaprolactone (PCL), poly(L-lactide-co-caprolactone) (P[LAcoCL]) with two molar ratios (70:30 and 85:15), and poly(L-lactide-co-glycolide) (with molar ratio 82:18). The radiopaque component of the materials was a mixture of barium sulphate and hydroxyapatite. The changes in water contact angle, stiffness, and radiopacity occurring during the 24-week-long degradation experiment were examined for the first time. This study comprehensively analyses the microstructural causes of composites behaviour within degradation experiments using thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), gel permitted chromatography (GPC), and scanning electron microscopy (SEM). The obtained results suggest that the utilized biodegradable matrix plays an essential role in radiopaque composite properties and stability thereof. This long-term in vitro assessment enabled a comparison of the materials and aided in choosing the most favourable composite for FMs' fabrication.
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Affiliation(s)
- Żaneta Górecka
- Division of Materials Design, Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Woloska Str., 02-507 Warsaw, Poland
- Centre for Advanced Materials and Technologies CEZAMAT, Warsaw University of Technology, 19 Poleczki Str., 02-882 Warsaw, Poland
| | - Emilia Choińska
- Division of Materials Design, Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Woloska Str., 02-507 Warsaw, Poland
| | - Marcin Heljak
- Division of Materials Design, Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Woloska Str., 02-507 Warsaw, Poland
| | - Wojciech Święszkowski
- Centre for Advanced Materials and Technologies CEZAMAT, Warsaw University of Technology, 19 Poleczki Str., 02-882 Warsaw, Poland
- Correspondence:
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Tian Y, Liu M, Liu W, Cheng J, Wu G, Han T, Zhang Y, Zhao G, Ni Z. Effects of annealing temperature on both radial supporting performance and axial flexibility of poly(L‐lactic acid) braided stents. J Appl Polym Sci 2021. [DOI: 10.1002/app.50517] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yuan Tian
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments Southeast University Nanjing China
| | - Muqing Liu
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments Southeast University Nanjing China
| | - Wentao Liu
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments Southeast University Nanjing China
| | - Jie Cheng
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments Southeast University Nanjing China
| | - Gensheng Wu
- School of Mechanical and Electronic Engineering Nanjing Forestry University Nanjing China
| | - Ting Han
- Department of Thermal Analysis Instrument Mettler‐Toledo Company Shanghai China
| | - Yi Zhang
- Center of Interventional Radiology & Vascular Surgery, Department of Radiology, Zhongda Hospital, Medical School Southeast University Nanjing China
| | - Gutian Zhao
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments Southeast University Nanjing China
| | - Zhonghua Ni
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments Southeast University Nanjing China
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4
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Zhang Y, Zhao J, Yang G, Zhou Y, Gao W, Wu G, Li X, Mao C, Sheng T, Zhou M. Mechanical properties and degradation of drug eluted bioresorbable vascular scaffolds prepared by three-dimensional printing technology. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2019; 30:547-560. [PMID: 30897033 DOI: 10.1080/09205063.2019.1586303] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Bioresorbable vascular scaffolds are expected to replace the traditional metal stent, avoiding the long-term complications of metal stents. However, it is hard for the traditional scaffold manufacturing process to meet the requirements of individualized treatment for vascular lesions, which requires different morphologies. Here, we used a new method of scaffold manufacturing, three-dimensional printing technology, to prepare bioresorbable vascular scaffolds. The fabricated scaffold was loaded with sirolimus mixed with scaffold preparation material for slow drug release. The engineered, drug- loaded, bioresorbable vascular scaffold (BVS) was analyzed and tested in vivo. The scaffolds produced by three-dimensional printing technology exhibited good mechanical properties and in vitro degradation performance. The results also suggested that these scaffolds could maintain effective radial strength after long-term degradation and sustained release of the drug. As a new scaffold preparation method, it may provide a promising idea for developing bioresorbable vascular scaffold technology.
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Affiliation(s)
- Yepeng Zhang
- a Department of Vascular Surgery , Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School , Nanjing , People's Republic of China
| | - Jie Zhao
- a Department of Vascular Surgery , Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School , Nanjing , People's Republic of China
| | - Guangmin Yang
- a Department of Vascular Surgery , Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School , Nanjing , People's Republic of China
| | - Yu Zhou
- a Department of Vascular Surgery , Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School , Nanjing , People's Republic of China
| | - Wentao Gao
- a Department of Vascular Surgery , Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School , Nanjing , People's Republic of China
| | - Guangyan Wu
- a Department of Vascular Surgery , Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School , Nanjing , People's Republic of China
| | - Xiaoqiang Li
- a Department of Vascular Surgery , Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School , Nanjing , People's Republic of China
| | - Chun Mao
- b School of Chemistry and National and Local Joint Engineering Research Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biofunctional Materials Materials Science , Nanjing Normal University , Nanjing , People's Republic of China
| | - Tao Sheng
- c Department of Vascular and Interventional Radiology , Wujin People's Hospital Affilicated to Jiangsu University , Changzhou , People's Republic of China
| | - Min Zhou
- a Department of Vascular Surgery , Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School , Nanjing , People's Republic of China
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Attia MF, Brummel BR, Lex TR, Van Horn BA, Whitehead DC, Alexis F. Recent Advances in Polyesters for Biomedical Imaging. Adv Healthc Mater 2018; 7:e1800798. [PMID: 30295005 DOI: 10.1002/adhm.201800798] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Revised: 09/03/2018] [Indexed: 12/11/2022]
Abstract
Several synthetic materials exhibiting contrast imaging properties have become vital to the field of biomedical imaging. Polymeric biomaterials and metals are commonly used imaging agents and can assist in the monitoring of therapy response, migration, degradation, changes in morphology, defects, and image-guided surgery. In comparison to metals, most bio and synthetic polymers lack inherent imaging properties. Polymeric biomaterials, specifically polyesters, have gained a considerable amount of attention due to their unique properties including biocompatibility, biodegradation, facile synthesis, and modification capability. Polyester implants and nanomaterials are available on the market or are in clinical trials for many applications including: dental implants, cranio-maxilofacial implants, soft tissue sutures and staples, abdominal wall repair, tendon and ligament reconstruction, fracture fixation devices, and coronary drug eluting stents. This review aims to provide a summary of the recent developments of polyesters with bioimaging contrast properties. The three main approaches to prepare bioimaging polyesters (coating, encapsulation, and functionalization) are discussed in depth. Furthermore, commonly used imaging modalities including X-ray computed tomography, magnetic resonance imaging, ultrasound, fluorescence, and radionucleotide polyester contrast agents are highlighted. In each section, examples of impactful bioimaging polyesters in the five major imaging modalities are evaluated.
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Affiliation(s)
- Mohamed F. Attia
- Department of Bioengineering; Clemson University; 301 Rhodes Research Center Clemson SC 29634 USA
| | - Beau R. Brummel
- Department of Chemistry; Clemson University; 467 Hunter Laboratories Clemson SC 29634 USA
| | - Timothy R. Lex
- Department of Chemistry; Clemson University; 467 Hunter Laboratories Clemson SC 29634 USA
| | - Brooke A. Van Horn
- Department of Chemistry and Biochemistry; College of Charleston; 66 George St. Charleston SC 29414 USA
| | - Daniel C. Whitehead
- Department of Chemistry; Clemson University; 467 Hunter Laboratories Clemson SC 29634 USA
| | - Frank Alexis
- Department of Bioengineering; Clemson University; 301 Rhodes Research Center Clemson SC 29634 USA
- School of Biological Sciences and Engineering; Yachay Tech; Hacienda San José s/n; San Miguel de Urcuquí 100119 Ecuador
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Im SH, Jung Y, Kim SH. Current status and future direction of biodegradable metallic and polymeric vascular scaffolds for next-generation stents. Acta Biomater 2017; 60:3-22. [PMID: 28716610 DOI: 10.1016/j.actbio.2017.07.019] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 07/04/2017] [Accepted: 07/12/2017] [Indexed: 01/18/2023]
Abstract
Because of the increasing incidence of coronary artery disease, the importance of cardiovascular stents has continuously increased as a treatment of this disease. Biodegradable scaffolds fabricated from polymers and metals have emerged as promising materials for vascular stents because of their biodegradability. Although such stent framework materials have shown good clinical efficacy, it is difficult to decide whether polymers or metals are better vascular scaffolds because their properties are different. Therefore, there are still obstacles in the development of biodegradable vascular scaffolds in terms of improving clinical efficacy. This review analyzes the pros and cons of current stent materials with respect to five key factors for next-generation stent and discusses methods of improvement. Furthermore, we discuss biodegradable electronic stents with electrical conductivity, which has been considered unimportant until now, and highlight electrical conductivity as a key factor in the development of next-generation stents.
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Huang Y, Wong YS, Ng HCA, Boey FYC, Venkatraman S. Translation in cardiovascular stents and occluders: From biostable to fully degradable. Bioeng Transl Med 2017; 2:156-169. [PMID: 29313029 PMCID: PMC5675095 DOI: 10.1002/btm2.10066] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 06/16/2017] [Accepted: 06/18/2017] [Indexed: 12/20/2022] Open
Abstract
Cardiovascular disease is a major cause of morbidity and mortality, especially in developed countries. Most academic research efforts in cardiovascular disease management focus on pharmacological interventions, or are concerned with discovering new disease markers for diagnosis and monitoring. Nonpharmacological interventions with therapeutic devices, conversely, are driven largely by novel materials and device design. Examples of such devices include coronary stents, heart valves, ventricular assist devices, and occluders for septal defects. Until recently, development of such devices remained largely with medical device companies. We trace the materials evolution story in two of these devices (stents and occluders), while also highlighting academic contributions, including our own, to the evolution story. Specifically, it addresses not only our successes, but also the challenges facing the translatability of concepts generated via academic research.
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Affiliation(s)
- Yingying Huang
- School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore
| | - Yee Shan Wong
- School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore
| | - Herr Cheun Anthony Ng
- School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore
| | - Freddy Y C Boey
- School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore
| | - Subbu Venkatraman
- School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore
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8
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Yang G, Xie H, Huang Y, Lv Y, Zhang M, Shang Y, Zhou J, Wang L, Wang JY, Chen F. Immersed multilayer biodegradable ureteral stent with reformed biodegradation: An in vitro experiment. J Biomater Appl 2017; 31:1235-1244. [PMID: 28274192 DOI: 10.1177/0885328217692279] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective The aim of this study was to develop a novel immersed multilayer biodegradable ureteral stent with reformed biodegradation and evaluate it in vitro. Methods Poly(glycolic-co-lactic acid) (PGLA), microsphere zein and BaSO4 were employed to produce a multilayer biodegradable stent using immersion technology. Tests of the biodegradable stents and conventional control stents were conducted in human urine in vitro to evaluate the biodegradable properties. The biocompatibility was assessed by the morphology and proliferation of urine-derived cells cultured with extracted media from the biodegradable stent and a latex material positive control. Results An immersed multilayer biodegradable stent was successfully produced. It began to degrade in week 2 and was fully degraded by week 4. The mass loss ratio in the first 2 weeks was low (approximately 10.0% at 1 week, 20.0% at 2 weeks) and increased after 3 weeks (approximately 70%) to the end of testing. During the first 2 weeks, the radial compression load performances of the biodegradable stents were better than those of the control stents with statistically significant differences ( p = 0.00, p = 0.01) and the tensile strengths were lower in the biodegradable stents than those in the control stents throughout the experiment. SEM showed that the stents degraded layer by layer from the outer to the inner wall. The influences on the cells of extracted medium from the biodegradable stents were morphologically slight and lower than 10% in relative growth rates. Conclusions This preliminary study demonstrates that the immersed multilayer biodegradable ureteral stent has good radial compression and biocompatible performance and can be degraded in vitro within 4 weeks in a moderate manner.
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Affiliation(s)
- Ganggang Yang
- Department of Urology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Hua Xie
- Department of Urology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Yichen Huang
- Department of Urology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Yiqing Lv
- Department of Urology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Mingqing Zhang
- Department of Urology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Yafeng Shang
- Department of Urology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Junmei Zhou
- Central Laboratory, Shanghai Children's Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Liping Wang
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Jin-Ye Wang
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Fang Chen
- Department of Urology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
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Bioabsorbable radiopaque water-responsive shape memory embolization plug for temporary vascular occlusion. Biomaterials 2016; 102:98-106. [DOI: 10.1016/j.biomaterials.2016.06.014] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 06/03/2016] [Accepted: 06/05/2016] [Indexed: 11/23/2022]
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Ferdous J, Kolachalama VB, Kolandaivelu K, Shazly T. Degree of bioresorbable vascular scaffold expansion modulates loss of essential function. Acta Biomater 2015; 26:195-204. [PMID: 26277377 PMCID: PMC4584207 DOI: 10.1016/j.actbio.2015.08.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 07/03/2015] [Accepted: 08/11/2015] [Indexed: 11/20/2022]
Abstract
Drug-eluting bioresorbable vascular scaffolds (BVSs) have the potential to restore lumen patency, enable recovery of the native vascular environment, and circumvent late complications associated with permanent endovascular devices. To ensure therapeutic effects persist for sufficient times prior to scaffold resorption and resultant functional loss, many factors dictating BVS performance must be identified, characterized and optimized. While some factors relate to BVS design and manufacturing, others depend on device deployment and intrinsic vascular properties. Importantly, these factors interact and cannot be considered in isolation. The objective of this study is to quantify the extent to which degree of radial expansion modulates BVS performance, specifically in the context of modifying device erosion kinetics and evolution of structural mechanics and local drug elution. We systematically varied degree of radial expansion in model BVS constructs composed of poly dl-lactide-glycolide and generated in vitro metrics of device microstructure, degradation, erosion, mechanics and drug release. Experimental data permitted development of computational models that predicted transient concentrations of scaffold-derived soluble species and drug in the arterial wall, thus enabling speculation on the short- and long-term effects of differential expansion. We demonstrate that degree of expansion significantly affects scaffold properties critical to functionality, underscoring its relevance in BVS design and optimization. STATEMENT OF SIGNIFICANCE Bioresorbable vascular scaffold (BVS) therapy is beginning to transform the treatment of obstructive artery disease, owing to effective treatment of short term vessel closure while avoiding long term consequences such as in situ, late stent thrombosis - a fatal event associated with permanent implants such as drug-eluting stents. As device scaffolding and drug elution are temporary for BVS, the notion of using this therapy in lieu of existing, clinically approved devices seems attractive. However, there is still a limited understanding regarding the optimal lifetime and performance characteristics of erodible endovascular implants. Several engineering criteria must be met and clinical endpoints confirmed to ensure these devices are both safe and effective. In this manuscript, we sought to establish general principles for the design and deployment of erodible, drug-eluting endovascular scaffolds, with focus on how differential expansion can modulate device performance.
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Affiliation(s)
- Jahid Ferdous
- Biomedical Engineering Program, College of Engineering and Computing, University of South Carolina, Columbia, SC 29208, USA
| | - Vijaya B Kolachalama
- Charles Stark Draper Laboratory, Cambridge, MA 02139, USA; Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Cardiovascular Division, Brigham and Women's Hospital, 75 Francis Street, Boston, MA 02115, USA
| | - Kumaran Kolandaivelu
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Cardiovascular Division, Brigham and Women's Hospital, 75 Francis Street, Boston, MA 02115, USA
| | - Tarek Shazly
- Biomedical Engineering Program, College of Engineering and Computing, University of South Carolina, Columbia, SC 29208, USA; Department of Mechanical Engineering, College of Engineering and Computing, University of South Carolina, Columbia, SC 29208, USA.
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Choi SY, Hur W, Kim BK, Shasteen C, Kim MH, Choi LM, Lee SH, Park CG, Park M, Min HS, Kim S, Choi TH, Choy YB. Bioabsorbable bone fixation plates for X‐ray imaging diagnosis by a radiopaque layer of barium sulfate and poly(lactic‐
co
‐glycolic acid). J Biomed Mater Res B Appl Biomater 2014; 103:596-607. [DOI: 10.1002/jbm.b.33235] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Revised: 04/23/2014] [Accepted: 06/05/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Sung Yoon Choi
- Interdisciplinary Program in Bioengineering, College of EngineeringSeoul National UniversitySeoul152‐742 Republic of Korea
| | - Woojune Hur
- Biomedical Research InstituteSeoul National University HospitalSeoul110‐744 Republic of Korea
- Department of Plastic and Reconstructive SurgeryInstitute of Human‐Environment Interface Biology, College of Medicine, Seoul National UniversitySeoul110‐799 Republic of Korea
| | - Byeung Kyu Kim
- Biomedical Research InstituteSeoul National University HospitalSeoul110‐744 Republic of Korea
- Department of Plastic and Reconstructive SurgeryInstitute of Human‐Environment Interface Biology, College of Medicine, Seoul National UniversitySeoul110‐799 Republic of Korea
| | - Catherine Shasteen
- Department of Materials Science and Engineering, College of EngineeringSeoul National UniversitySeoul151‐744 Republic of Korea
| | - Myung Hun Kim
- Interdisciplinary Program in Bioengineering, College of EngineeringSeoul National UniversitySeoul152‐742 Republic of Korea
| | - La Mee Choi
- Biomedical Research InstituteSeoul National University HospitalSeoul110‐744 Republic of Korea
- Department of Plastic and Reconstructive SurgeryInstitute of Human‐Environment Interface Biology, College of Medicine, Seoul National UniversitySeoul110‐799 Republic of Korea
| | - Seung Ho Lee
- Interdisciplinary Program in Bioengineering, College of EngineeringSeoul National UniversitySeoul152‐742 Republic of Korea
| | - Chun Gwon Park
- Interdisciplinary Program in Bioengineering, College of EngineeringSeoul National UniversitySeoul152‐742 Republic of Korea
| | - Min Park
- Interdisciplinary Program in Bioengineering, College of EngineeringSeoul National UniversitySeoul152‐742 Republic of Korea
| | - Hye Sook Min
- Department of Preventive Medicine, Graduate School of Public HealthSeoul National University College of MedicineSeoul110‐799 Republic of Korea
| | - Sukwha Kim
- Department of Plastic and Reconstructive SurgeryInstitute of Human‐Environment Interface Biology, College of Medicine, Seoul National UniversitySeoul110‐799 Republic of Korea
| | - Tae Hyun Choi
- Department of Plastic and Reconstructive SurgeryInstitute of Human‐Environment Interface Biology, College of Medicine, Seoul National UniversitySeoul110‐799 Republic of Korea
| | - Young Bin Choy
- Interdisciplinary Program in Bioengineering, College of EngineeringSeoul National UniversitySeoul152‐742 Republic of Korea
- Department of Biomedical EngineeringSeoul National University College of MedicineSeoul110‐799 Republic of Korea
- Institute of Medical and Biological Engineering, Medical Research CenterSeoul National UniversitySeoul110‐799 Republic of Korea
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12
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Cortecchia E, Pacilli A, Pasquinelli G, Scandola M. Biocompatible two-layer tantalum/titania-polymer hybrid coating. Biomacromolecules 2011; 11:2446-53. [PMID: 20831278 DOI: 10.1021/bm100619t] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Using a two-step procedure, radiopaque and biocompatible coatings were obtained, consisting of a tantalum layer deposited by sputtering technique and of an upper organic-inorganic hybrid layer synthesized via sol-gel. As shown by radiographic images, tantalum confers to plastic substrates good X-ray visibility, adjustable via control of deposition time, but its adhesion to the substrate is poor and manipulation easily damages the metal layer. Polymer-titania hybrid coatings, synthesized using poly-ε-caprolactone (PCL) or carboxy-terminated polydimethylsiloxane (PDMS) as organic precursors, were applied on the metal layer as biocompatible protective coatings. Biocompatibility is demonstrated by cytotoxicity tests conducted using vascular wall resident-mesenchymal stem cells (VW-MSCs). Both coatings show very good adhesion to the substrate, showing no sign of detachment upon large substrate deformations. Under such conditions, SEM observations show that the PCL-containing hybrid forms cracks, whereas the PDMS-based hybrid does not crack, suggesting possible applications of the latter material as a protective layer of sputtered tantalum radiopaque markers for flexible medical devices.
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Affiliation(s)
- Elisa Cortecchia
- Dipartimento di Chimica "G. Ciamician", Università di Bologna and INSTM UdR Bologna, Via Selmi 2, 40126 Bologna, Italy
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