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Sass JO, Sellin ML, Kauertz E, Johannsen J, Weinmann M, Stenzel M, Frank M, Vogel D, Bader R, Jonitz-Heincke A. Advanced Ti-Nb-Ta Alloys for Bone Implants with Improved Functionality. J Funct Biomater 2024; 15:46. [PMID: 38391899 PMCID: PMC10889793 DOI: 10.3390/jfb15020046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 02/08/2024] [Accepted: 02/15/2024] [Indexed: 02/24/2024] Open
Abstract
The additive manufacturing of titanium-niobium-tantalum alloys with nominal chemical compositions Ti-xNb-6Ta (x = 20, 27, 35) by means of laser beam powder bed fusion is reported, and their potential as implant materials is elaborated by mechanical and biological characterization. The properties of dense specimens manufactured in different build orientations and of open porous Ti-20Nb-6Ta specimens are evaluated. Compression tests indicate that strength and elasticity are influenced by the chemical composition and build orientation. The minimum elasticity is always observed in the 90° orientation. It is lowest for Ti-20Nb-6Ta (43.2 ± 2.7 GPa) and can be further reduced to 8.1 ± 1.0 GPa for open porous specimens (p < 0.001). Furthermore, human osteoblasts are cultivated for 7 and 14 days on as-printed specimens and their biological response is compared to that of Ti-6Al-4V. Build orientation and cultivation time significantly affect the gene expression profile of osteogenic differentiation markers. Incomplete cell spreading is observed in specimens manufactured in 0° build orientation, whereas widely stretched cells are observed in 90° build orientation, i.e., parallel to the build direction. Compared to Ti-6Al-4V, Ti-Nb-Ta specimens promote improved osteogenesis and reduce the induction of inflammation. Accordingly, Ti-xNb-6Ta alloys have favorable mechanical and biological properties with great potential for application in orthopedic implants.
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Affiliation(s)
- Jan-Oliver Sass
- Research Laboratory for Biomechanics and Implant Technology, Department of Orthopaedics, Rostock University Medical Center, Doberaner Straße 142, 18057 Rostock, Germany
| | - Marie-Luise Sellin
- Research Laboratory for Biomechanics and Implant Technology, Department of Orthopaedics, Rostock University Medical Center, Doberaner Straße 142, 18057 Rostock, Germany
| | - Elisa Kauertz
- Research Laboratory for Biomechanics and Implant Technology, Department of Orthopaedics, Rostock University Medical Center, Doberaner Straße 142, 18057 Rostock, Germany
| | - Jan Johannsen
- Fraunhofer Research Institution for Additive Manufacturing Technologies IAPT, Am Schleusengraben 14, 21029 Hamburg, Germany
| | | | | | - Marcus Frank
- Medical Biology and Electron Microscopy Center, Rostock University Medical Center, Strempelstraße 14, 18057 Rostock, Germany
- Department Life, Light and Matter, University of Rostock, 18051 Rostock, Germany
| | - Danny Vogel
- Research Laboratory for Biomechanics and Implant Technology, Department of Orthopaedics, Rostock University Medical Center, Doberaner Straße 142, 18057 Rostock, Germany
| | - Rainer Bader
- Research Laboratory for Biomechanics and Implant Technology, Department of Orthopaedics, Rostock University Medical Center, Doberaner Straße 142, 18057 Rostock, Germany
- Department Life, Light and Matter, University of Rostock, 18051 Rostock, Germany
| | - Anika Jonitz-Heincke
- Research Laboratory for Biomechanics and Implant Technology, Department of Orthopaedics, Rostock University Medical Center, Doberaner Straße 142, 18057 Rostock, Germany
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Wang X, Zhang D, Peng H, Yang J, Li Y, Xu J. Optimize the pore size-pore distribution-pore geometry-porosity of 3D-printed porous tantalum to obtain optimal critical bone defect repair capability. BIOMATERIALS ADVANCES 2023; 154:213638. [PMID: 37812984 DOI: 10.1016/j.bioadv.2023.213638] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 07/27/2023] [Accepted: 09/22/2023] [Indexed: 10/11/2023]
Abstract
The treatment and reconstruction of large or critical size bone defects is a challenging clinical problem. Additive manufacturing breaks the technical difficulties of preparing complex conformation and anatomically matched personalized porous tantalum implants, but the ideal pore structure for 3D-printed porous tantalum in critical bone defect repair applications remains unclear. Guiding appropriate bone tissue regeneration by regulating proper pore size-pore distribution-pore geometry-porosity is a challenge for its fabrication and application. We fabricated porous tantalum (PTa) scaffolds with six different combinations of pore structures using powder bed laser melting (L-PBF) technology. In vitro biological experiments were conducted to systematically investigate the effects of pore structure characteristics on osteoblast behaviors, showing that the bionic trabecular structure with both large and small poress facilitated cell permeation, proliferation and differentiation compared to the cubic structure with uniform pore sizes. The osteogenesis of PTa with different porosity of trabecular structures was further investigated by a rabbit condyle critical bone defect model. Synthetically, T70% up-regulated the expression of osteogenesis-related genes (ALP, COLI, OCN, RUNX-2) and showed the highest bone ingrowth area and bone contact rate in vivo after 16 weeks, with the best potential for critical bone defect repair. Our results suggested that the bionic trabecular structure with a pore size distribution of 200-1200 μm, an average pore size of 700 μm, and a porosity of 70 % is the best choice for repairing critical bone defects, which is expected to guide the clinical application of clinical 3D-printed PTa scaffolds.
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Affiliation(s)
- Xueying Wang
- Biomaterials Laboratory of the Medical Device Inspection Institute, National Institutes for Food and Drug Control, Beijing, China; School of Material Science and Engineering, Beihang University, Beijing, China
| | - Dachen Zhang
- Shenzhen Dazhou Medical Technology Co., Ltd., Shenzhen, Guangdong, China
| | - Haitao Peng
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital of Sichuan University, Chengdu, Sichuan, China
| | - Jingzhou Yang
- Shenzhen Dazhou Medical Technology Co., Ltd., Shenzhen, Guangdong, China; School of Mechanical and Automobile Engineering, Qingdao University of Technology, Qingdao, Shandong, China.
| | - Yan Li
- School of Material Science and Engineering, Beihang University, Beijing, China.
| | - Jianxia Xu
- Biomaterials Laboratory of the Medical Device Inspection Institute, National Institutes for Food and Drug Control, Beijing, China.
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The Cellular Choreography of Osteoblast Angiotropism in Bone Development and Homeostasis. Int J Mol Sci 2021; 22:ijms22147253. [PMID: 34298886 PMCID: PMC8305002 DOI: 10.3390/ijms22147253] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 06/23/2021] [Accepted: 06/29/2021] [Indexed: 12/11/2022] Open
Abstract
Interaction between endothelial cells and osteoblasts is essential for bone development and homeostasis. This process is mediated in large part by osteoblast angiotropism, the migration of osteoblasts alongside blood vessels, which is crucial for the homing of osteoblasts to sites of bone formation during embryogenesis and in mature bones during remodeling and repair. Specialized bone endothelial cells that form "type H" capillaries have emerged as key interaction partners of osteoblasts, regulating osteoblast differentiation and maturation and ensuring their migration towards newly forming trabecular bone areas. Recent revolutions in high-resolution imaging methodologies for bone as well as single cell and RNA sequencing technologies have enabled the identification of some of the signaling pathways and molecular interactions that underpin this regulatory relationship. Similarly, the intercellular cross talk between endothelial cells and entombed osteocytes that is essential for bone formation, repair, and maintenance are beginning to be uncovered. This is a relatively new area of research that has, until recently, been hampered by a lack of appropriate analysis tools. Now that these tools are available, greater understanding of the molecular relationships between these key cell types is expected to facilitate identification of new drug targets for diseases of bone formation and remodeling.
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Gwon Y, Park S, Kim W, Han T, Kim H, Kim J. Radially patterned transplantable biodegradable scaffolds as topographically defined contact guidance platforms for accelerating bone regeneration. J Biol Eng 2021; 15:12. [PMID: 33752709 PMCID: PMC7986475 DOI: 10.1186/s13036-021-00263-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 03/15/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The healing of large critical-sized bone defects remains a clinical challenge in modern orthopedic medicine. The current gold standard for treating critical-sized bone defects is autologous bone graft; however, it has critical limitations. Bone tissue engineering has been proposed as a viable alternative, not only for replacing the current standard treatment, but also for producing complete regeneration of bone tissue without complex surgical treatments or tissue transplantation. In this study, we proposed a transplantable radially patterned scaffold for bone regeneration that was defined by capillary force lithography technology using biodegradable polycaprolactone polymer. RESULTS The radially patterned transplantable biodegradable scaffolds had a radial structure aligned in a central direction. The radially aligned pattern significantly promoted the recruitment of host cells and migration of osteoblasts into the defect site. Furthermore, the transplantable scaffolds promoted regeneration of critical-sized bone defects by inducing cell migration and differentiation. CONCLUSIONS Our findings demonstrated that topographically defined radially patterned transplantable biodegradable scaffolds may have great potential for clinical application of bone tissue regeneration.
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Affiliation(s)
- Yonghyun Gwon
- Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
- Interdisciplinary Program in IT-Bio Convergence System, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Sunho Park
- Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
- Interdisciplinary Program in IT-Bio Convergence System, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Woochan Kim
- Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Taeseong Han
- Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Hyoseong Kim
- Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Jangho Kim
- Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea.
- Interdisciplinary Program in IT-Bio Convergence System, Chonnam National University, Gwangju, 61186, Republic of Korea.
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Berkmann JC, Herrera Martin AX, Ellinghaus A, Schlundt C, Schell H, Lippens E, Duda GN, Tsitsilonis S, Schmidt-Bleek K. Early pH Changes in Musculoskeletal Tissues upon Injury-Aerobic Catabolic Pathway Activity Linked to Inter-Individual Differences in Local pH. Int J Mol Sci 2020; 21:ijms21072513. [PMID: 32260421 PMCID: PMC7177603 DOI: 10.3390/ijms21072513] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 03/29/2020] [Accepted: 04/02/2020] [Indexed: 01/09/2023] Open
Abstract
Local pH is stated to acidify after bone fracture. However, the time course and degree of acidification remain unknown. Whether the acidification pattern within a fracture hematoma is applicable to adjacent muscle hematoma or is exclusive to this regenerative tissue has not been studied to date. Thus, in this study, we aimed to unravel the extent and pattern of acidification in vivo during the early phase post musculoskeletal injury. Local pH changes after fracture and muscle trauma were measured simultaneously in two pre-clinical animal models (sheep/rats) immediately after and up to 48 h post injury. The rat fracture hematoma was further analyzed histologically and metabolomically. In vivo pH measurements in bone and muscle hematoma revealed a local acidification in both animal models, yielding mean pH values in rats of 6.69 and 6.89, with pronounced intra- and inter-individual differences. The metabolomic analysis of the hematomas indicated a link between reduction in tricarboxylic acid cycle activity and pH, thus, metabolic activity within the injured tissues could be causative for the different pH values. The significant acidification within the early musculoskeletal hematoma could enable the employment of the pH for novel, sought-after treatments that allow for spatially and temporally controlled drug release.
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Affiliation(s)
- Julia C. Berkmann
- Julius Wolff Institut, Charité–Universitätsmedizin Berlin, 13353 Berlin, Germany; (J.C.B.); (A.X.H.M.); (C.S.); (H.S.); (E.L.); (G.N.D.); (S.T.)
- Berlin-Brandenburg School for Regenerative Therapies, Charité–Universitätsmedizin Berlin, 13353 Berlin, Germany
| | - Aaron X. Herrera Martin
- Julius Wolff Institut, Charité–Universitätsmedizin Berlin, 13353 Berlin, Germany; (J.C.B.); (A.X.H.M.); (C.S.); (H.S.); (E.L.); (G.N.D.); (S.T.)
- Berlin-Brandenburg School for Regenerative Therapies, Charité–Universitätsmedizin Berlin, 13353 Berlin, Germany
| | - Agnes Ellinghaus
- BIH Center for Regenerative Therapies, Charité–Universitätsmedizin Berlin, Berlin 10178, Germany;
| | - Claudia Schlundt
- Julius Wolff Institut, Charité–Universitätsmedizin Berlin, 13353 Berlin, Germany; (J.C.B.); (A.X.H.M.); (C.S.); (H.S.); (E.L.); (G.N.D.); (S.T.)
| | - Hanna Schell
- Julius Wolff Institut, Charité–Universitätsmedizin Berlin, 13353 Berlin, Germany; (J.C.B.); (A.X.H.M.); (C.S.); (H.S.); (E.L.); (G.N.D.); (S.T.)
| | - Evi Lippens
- Julius Wolff Institut, Charité–Universitätsmedizin Berlin, 13353 Berlin, Germany; (J.C.B.); (A.X.H.M.); (C.S.); (H.S.); (E.L.); (G.N.D.); (S.T.)
| | - Georg N. Duda
- Julius Wolff Institut, Charité–Universitätsmedizin Berlin, 13353 Berlin, Germany; (J.C.B.); (A.X.H.M.); (C.S.); (H.S.); (E.L.); (G.N.D.); (S.T.)
- BIH Center for Regenerative Therapies, Charité–Universitätsmedizin Berlin, Berlin 10178, Germany;
| | - Serafeim Tsitsilonis
- Julius Wolff Institut, Charité–Universitätsmedizin Berlin, 13353 Berlin, Germany; (J.C.B.); (A.X.H.M.); (C.S.); (H.S.); (E.L.); (G.N.D.); (S.T.)
- Center for Musculoskeletal Surgery, Charité–Universitätsmedizin Berlin, 13357 Berlin, Germany
| | - Katharina Schmidt-Bleek
- Julius Wolff Institut, Charité–Universitätsmedizin Berlin, 13353 Berlin, Germany; (J.C.B.); (A.X.H.M.); (C.S.); (H.S.); (E.L.); (G.N.D.); (S.T.)
- BIH Center for Regenerative Therapies, Charité–Universitätsmedizin Berlin, Berlin 10178, Germany;
- Correspondence: ; Tel.: +49-(0)30-450-659209; Fax: +49-(0)30-450-559938
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URDEITX PAU, FARZANEH SOLMAZ, MOUSAVI SJAMALEDDIN, DOWEIDAR MOHAMEDH. ROLE OF OXYGEN CONCENTRATION IN THE OSTEOBLASTS BEHAVIOR: A FINITE ELEMENT MODEL. J MECH MED BIOL 2020. [DOI: 10.1142/s0219519419500647] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Oxygen concentration plays a key role in cell survival and viability. Besides, it has important effects on essential cellular biological processes such as cell migration, differentiation, proliferation and apoptosis. Therefore, the prediction of the cellular response to the alterations of the oxygen concentration can help significantly in the advances of cell culture research. Here, we present a 3D computational mechanotactic model to simulate all the previously mentioned cell processes under different oxygen concentrations. With this model, three cases have been studied. Starting with mesenchymal stem cells within an extracellular matrix with mechanical properties suitable for its differentiation into osteoblasts, and under different oxygen conditions to evaluate their behavior under normoxia, hypoxia and anoxia. The obtained results, which are consistent with the experimental observations, indicate that cells tend to migrate toward zones with higher oxygen concentration where they accelerate their differentiation and proliferation. This technique can be employed to control cell migration toward fracture zones to accelerate the healing process. Besides, as expected, to avoid cell apoptosis under conditions of anoxia and to avoid the inhibition of the differentiation and proliferation processes under conditions of hypoxia, the state of normoxia should be maintained throughout the entire cell-culture process.
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Affiliation(s)
- PAU URDEITX
- Mechanical Engineering Department, School of Engineering and Architecture (EINA), University of Zaragoza, Zaragoza, Spain
- Aragón Institute of Engineering Research (I3A), University of Zaragoza, Zaragoza, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Zaragoza, Spain
| | - SOLMAZ FARZANEH
- Mines Saint-Etienne, Univ Lyon, Univ Jean Monnet, INSERM, U 1059, Sainbiose, Centre CIS, F - 42023, Saint-Etienne, France
| | - S. JAMALEDDIN MOUSAVI
- Mines Saint-Etienne, Univ Lyon, Univ Jean Monnet, INSERM, U 1059, Sainbiose, Centre CIS, F - 42023, Saint-Etienne, France
| | - MOHAMED H. DOWEIDAR
- Mechanical Engineering Department, School of Engineering and Architecture (EINA), University of Zaragoza, Zaragoza, Spain
- Aragón Institute of Engineering Research (I3A), University of Zaragoza, Zaragoza, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Zaragoza, Spain
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Zhang L, Yang G, Johnson BN, Jia X. Three-dimensional (3D) printed scaffold and material selection for bone repair. Acta Biomater 2019; 84:16-33. [PMID: 30481607 DOI: 10.1016/j.actbio.2018.11.039] [Citation(s) in RCA: 369] [Impact Index Per Article: 73.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 10/06/2018] [Accepted: 11/23/2018] [Indexed: 12/15/2022]
Abstract
Critical-sized bone defect repair remains a substantial challenge in clinical settings and requires bone grafts or bone substitute materials. However, existing biomaterials often do not meet the clinical requirements of structural support, osteoinductive property, and controllable biodegradability. To treat large-scale bone defects, the development of three-dimensional (3D) porous scaffolds has received considerable focus within bone engineering. A variety of biomaterials and manufacturing methods, including 3D printing, have emerged to fabricate patient-specific bioactive scaffolds that possess controlled micro-architectures for bridging bone defects in complex configurations. During the last decade, with the development of the 3D printing industry, a large number of tissue-engineered scaffolds have been created for preclinical and clinical applications using novel materials and innovative technologies. Thus, this review provides a brief overview of current progress in existing biomaterials and tissue engineering scaffolds prepared by 3D printing technologies, with an emphasis on the material selection, scaffold design optimization, and their preclinical and clinical applications in the repair of critical-sized bone defects. Furthermore, it will elaborate on the current limitations and potential future prospects of 3D printing technology. STATEMENT OF SIGNIFICANCE: 3D printing has emerged as a critical fabrication process for bone engineering due to its ability to control bulk geometry and internal structure of tissue scaffolds. The advancement of bioprinting methods and compatible ink materials for bone engineering have been a major focus to develop optimal 3D scaffolds for bone defect repair. Achieving a successful balance of cellular function, cellular viability, and mechanical integrity under load-bearing conditions is critical. Hybridization of natural and synthetic polymer-based materials is a promising approach to create novel tissue engineered scaffolds that combines the advantages of both materials and meets various requirements, including biological activity, mechanical strength, easy fabrication and controllable degradation. 3D printing is linked to the future of bone grafts to create on-demand patient-specific scaffolds.
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Affiliation(s)
- Lei Zhang
- Department of Orthopaedics, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325200, China
| | - Guojing Yang
- Department of Orthopaedics, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325200, China
| | - Blake N Johnson
- Department of Industrial and Systems Engineering, Virginia Tech, Blacksburg, VA 24061, USA
| | - Xiaofeng Jia
- Department of Neurosurgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Department of Orthopedics, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Department of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
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8
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Liu M, Lv Y. Reconstructing Bone with Natural Bone Graft: A Review of In Vivo Studies in Bone Defect Animal Model. NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:E999. [PMID: 30513940 PMCID: PMC6315600 DOI: 10.3390/nano8120999] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Revised: 11/25/2018] [Accepted: 11/29/2018] [Indexed: 12/28/2022]
Abstract
Bone defects caused by fracture, disease or congenital defect remains a medically important problem to be solved. Bone tissue engineering (BTE) is a promising approach by providing scaffolds to guide and support the treatment of bone defects. However, the autologous bone graft has many defects such as limited sources and long surgical procedures. Therefore, xenograft bone graft is considered as one of the best substitutions and has been effectively used in clinical practice. Due to better preserved natural bone structure, suitable mechanical properties, low immunogenicity, good osteoinductivity and osteoconductivity in natural bone graft, decellularized and demineralized bone matrix (DBM) scaffolds were selected and discussed in the present review. In vivo animal models provide a complex physiological environment for understanding and evaluating material properties and provide important reference data for clinical trials. The purpose of this review is to outline the in vivo bone regeneration and remodeling capabilities of decellularized and DBM scaffolds in bone defect models to better evaluate the potential of these two types of scaffolds in BTE. Taking into account the limitations of the state-of-the-art technology, the results of the animal bone defect model also provide important information for future design of natural bone composite scaffolds.
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Affiliation(s)
- Mengying Liu
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, Chongqing 400044, China.
- Mechanobiology and Regenerative Medicine Laboratory, Bioengineering College, Chongqing University, Chongqing 400044, China.
| | - Yonggang Lv
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, Chongqing 400044, China.
- Mechanobiology and Regenerative Medicine Laboratory, Bioengineering College, Chongqing University, Chongqing 400044, China.
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Ziebart J, Fan S, Schulze C, Kämmerer PW, Bader R, Jonitz-Heincke A. Effects of interfacial micromotions on vitality and differentiation of human osteoblasts. Bone Joint Res 2018; 7:187-195. [PMID: 29682285 PMCID: PMC5895940 DOI: 10.1302/2046-3758.72.bjr-2017-0228.r1] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Objectives Enhanced micromotions between the implant and surrounding bone can impair osseointegration, resulting in fibrous encapsulation and aseptic loosening of the implant. Since the effect of micromotions on human bone cells is sparsely investigated, an in vitro system, which allows application of micromotions on bone cells and subsequent investigation of bone cell activity, was developed. Methods Micromotions ranging from 25 µm to 100 µm were applied as sine or triangle signal with 1 Hz frequency to human osteoblasts seeded on collagen scaffolds. Micromotions were applied for six hours per day over three days. During the micromotions, a static pressure of 527 Pa was exerted on the cells by Ti6Al4V cylinders. Osteoblasts loaded with Ti6Al4V cylinders and unloaded osteoblasts without micromotions served as controls. Subsequently, cell viability, expression of the osteogenic markers collagen type I, alkaline phosphatase, and osteocalcin, as well as gene expression of osteoprotegerin, receptor activator of NF-κB ligand, matrix metalloproteinase-1, and tissue inhibitor of metalloproteinase-1, were investigated. Results Live and dead cell numbers were higher after 25 µm sine and 50 µm triangle micromotions compared with loaded controls. Collagen type I synthesis was downregulated in respective samples. The metabolic activity and osteocalcin expression level were higher in samples treated with 25 µm micromotions compared with the loaded controls. Furthermore, static loading and micromotions decreased the osteoprotegerin/receptor activator of NF-κB ligand ratio. Conclusion Our system enables investigation of the behaviour of bone cells at the bone-implant interface under shear stress induced by micromotions. We could demonstrate that micromotions applied under static pressure conditions have a significant impact on the activity of osteoblasts seeded on collagen scaffolds. In future studies, higher mechanical stress will be applied and different implant surface structures will be considered. Cite this article: J. Ziebart, S. Fan, C. Schulze, P. W. Kämmerer, R. Bader, A. Jonitz-Heincke. Effects of interfacial micromotions on vitality and differentiation of human osteoblasts. Bone Joint Res 2018;7:187–195. DOI: 10.1302/2046-3758.72.BJR-2017-0228.R1.
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Affiliation(s)
- J Ziebart
- Department of Orthopaedics, Rostock University Medical Center, Rostock 18057, Germany
| | - S Fan
- Department of Orthopaedics, Rostock University Medical Center, Rostock 18057, Germany
| | - C Schulze
- Department of Orthopaedics, Rostock University Medical Center, Rostock 18057, Germany
| | - P W Kämmerer
- Department of Oral, Maxillofacial and Plastic Surgery, Rostock University Medical Center, Rostock 18057, Germany
| | - R Bader
- Department of Orthopaedics, Rostock University Medical Center, Rostock 18057, Germany
| | - A Jonitz-Heincke
- Department of Orthopaedics, Rostock University Medical Center, Rostock 18057, Germany
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10
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Zaatreh S, Haffner D, Strauß M, Wegner K, Warkentin M, Lurtz C, Zamponi C, Mittelmeier W, Kreikemeyer B, Willumeit-Römer R, Quandt E, Bader R. Fast corroding, thin magnesium coating displays antibacterial effects and low cytotoxicity. BIOFOULING 2017; 33:294-305. [PMID: 28349700 DOI: 10.1080/08927014.2017.1303832] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 03/03/2017] [Indexed: 06/06/2023]
Abstract
Bacterial colonisation and biofilm formation are characteristics of implant-associated infections. In search of candidates for improved prosthetic materials, fast corroding Mg-based coatings on titanium surfaces were examined for their cytotoxic and antimicrobial properties. Human osteoblasts and Staphylococcus epidermidis were each cultured on cylindrical Ti samples coated with a thin layer of Mg/Mg45Zn5Ca, applied via magnetron sputtering. Uncoated titanium samples served as controls. S. epidermidis was quantified by counting colony forming units. The biofilm-bound fraction was isolated via ultrasonic treatment, and the planktonic fraction via centrifugation. Biofilm-bound S. epidermidis was significantly decreased by approximately four to five orders of magnitude in both Mg- and Mg45Zn5Ca-coated samples after seven days compared to the control. The osteoblast viability was within the tolerance threshold of 70% stated in DIN EN ISO 10993-5:2009-10 for Mg (~80%) but not for Mg45Zn5Ca (~25%). Accordingly, Mg-coated titanium was identified as a promising candidate for an implant material with antibacterial properties and low cytotoxicity levels. The approach of exploiting fast corrosion contrasts with existing methods, which have generally focused on reducing corrosion.
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Affiliation(s)
- Sarah Zaatreh
- a Biomechanics and Implant Technology Research Laboratory, Department of Orthopedics , University Medicine Rostock , Rostock , Germany
| | - David Haffner
- b Inorganic Functional Materials, Institute of Materials Science, Faculty of Engineering , Kiel University , Kiel , Germany
| | - Madlen Strauß
- a Biomechanics and Implant Technology Research Laboratory, Department of Orthopedics , University Medicine Rostock , Rostock , Germany
| | - Katharina Wegner
- a Biomechanics and Implant Technology Research Laboratory, Department of Orthopedics , University Medicine Rostock , Rostock , Germany
| | - Mareike Warkentin
- c Faculty of Mechanical Engineering and Marine Technology, Department of Material Science and Medical Engineering , University of Rostock , Rostock , Germany
| | - Claudia Lurtz
- c Faculty of Mechanical Engineering and Marine Technology, Department of Material Science and Medical Engineering , University of Rostock , Rostock , Germany
| | - Christiane Zamponi
- b Inorganic Functional Materials, Institute of Materials Science, Faculty of Engineering , Kiel University , Kiel , Germany
| | - Wolfram Mittelmeier
- a Biomechanics and Implant Technology Research Laboratory, Department of Orthopedics , University Medicine Rostock , Rostock , Germany
| | - Bernd Kreikemeyer
- d Institute of Medical Microbiology, Virology and Hygiene , University Medicine Rostock , Rostock , Germany
| | - Regine Willumeit-Römer
- e Institute of Materials Research, Division Metallic Biomaterials , Helmholtz-Zentrum Geesthacht , Geesthacht , Germany
| | - Eckhard Quandt
- b Inorganic Functional Materials, Institute of Materials Science, Faculty of Engineering , Kiel University , Kiel , Germany
| | - Rainer Bader
- a Biomechanics and Implant Technology Research Laboratory, Department of Orthopedics , University Medicine Rostock , Rostock , Germany
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11
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Zhu W, Xu C, Ma BP, Zheng ZB, Li YL, Ma Q, Wu GL, Weng XS. Three-dimensional Printed Scaffolds with Gelatin and Platelets Enhance In vitro Preosteoblast Growth Behavior and the Sustained-release Effect of Growth Factors. Chin Med J (Engl) 2017; 129:2576-2581. [PMID: 27779164 PMCID: PMC5125336 DOI: 10.4103/0366-6999.192770] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Background: Three-dimensional (3D) printing technology holds great promise for treating diseases or injuries that affect human bones with enhanced performance over traditional techniques. Different patterns of design can lead to various mechanical properties and biocompatibility to various degrees. However, there is still a long way to go before we can fully take advantage of 3D printing technologies. Methods: This study tailored 3D printed scaffolds with gelatin and platelets to maximize bone regeneration. The scaffolds were designed with special internal porous structures that can allow bone tissue and large molecules to infiltrate better into the scaffolds. They were then treated with gelatin and platelets via thermo-crosslinking and freeze-drying, respectively. Vascular endothelial growth factor (VEGF) and transforming growth factor (TGF)-β1 were measured at different time points after the scaffolds had been made. Cell proliferation and cytotoxicity were determined via cell counting kit-8 (CCK-8) assay. Results: There was a massive boost in the level of VEGF and TGF-β1 released by the scaffolds with gelatin and platelets compared to that of scaffolds with only gelatin. After 21 days of culture, the CCK-8 cell counts of the control group and treated group were significantly higher than that of the blank group (P < 0.05). The cytotoxicity test also indicated the safety of the scaffolds. Conclusions: Our experiments confirmed that the 3D printed scaffolds we had designed could provide a sustained-release effect for growth factors and improve the proliferation of preosteoblasts with little cytotoxicity in vitro. They may hold promise as bone graft substitute materials in the future.
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Affiliation(s)
- Wei Zhu
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Beijing 100730, China
| | - Chi Xu
- Department of Clinical Medicine, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Bu-Peng Ma
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Beijing 100730, China
| | - Zhi-Bo Zheng
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Beijing 100730, China
| | - Yu-Long Li
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Beijing 100730, China
| | - Qi Ma
- Department of Clinical Medicine, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Guo-Liang Wu
- Department of Clinical Medicine, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Xi-Sheng Weng
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Beijing 100730, China
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12
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Zaatreh S, Haffner D, Strauss M, Dauben T, Zamponi C, Mittelmeier W, Quandt E, Kreikemeyer B, Bader R. Thin magnesium layer confirmed as an antibacterial and biocompatible implant coating in a co‑culture model. Mol Med Rep 2017; 15:1624-1630. [PMID: 28260022 PMCID: PMC5365004 DOI: 10.3892/mmr.2017.6218] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 11/21/2016] [Indexed: 12/19/2022] Open
Abstract
Implant-associated infections commonly result from biofilm-forming bacteria and present severe complications in total joint arthroplasty. Therefore, there is a requirement for the development of biocompatible implant surfaces that prevent bacterial biofilm formation. The present study coated titanium samples with a thin, rapidly corroding layer of magnesium, which were subsequently investigated with respect to their antibacterial and cytotoxic surface properties using a Staphylococcus epidermidis (S. epidermidis) and human osteoblast (hOB) co-culture model. Primary hOBs and S. epidermidis were co-cultured on cylindrical titanium samples (Ti6Al4V) coated with pure magnesium via magnetron sputtering (5 µm thickness) for 7 days. Uncoated titanium test samples served as controls. Vital hOBs were identified by trypan blue staining at days 2 and 7. Planktonic S. epidermidis were quantified by counting the number of colony forming units (CFU). The quantification of biofilm-bound S. epidermidis on the surfaces of test samples was performed by ultrasonic treatment and CFU counting at days 2 and 7. The number of planktonic and biofilm-bound S. epidermidis on the magnesium-coated samples decreased by four orders of magnitude when compared with the titanium control following 7 days of co-culture. The number of vital hOBs on the magnesium-coated samples was observed to increase (40,000 cells/ml) when compared with the controls (20,000 cells/ml). The results of the present study indicate that rapidly corroding magnesium-coated titanium may be a viable coating material that possesses antibacterial and biocompatible properties. A co-culture test is more rigorous than a monoculture study, as it accounts for confounding effects and assesses additional interactions that are more representative of in vivo situations. These results provide a foundation for the future testing of this type of surface in animals.
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Affiliation(s)
- Sarah Zaatreh
- Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, University Medicine Rostock, D‑18057 Rostock, Germany
| | - David Haffner
- Institute for Materials Science, Faculty of Engineering, University of Kiel, D‑24143 Kiel, Germany
| | - Madlen Strauss
- Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, University Medicine Rostock, D‑18057 Rostock, Germany
| | - Thomas Dauben
- Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, University Medicine Rostock, D‑18057 Rostock, Germany
| | - Christiane Zamponi
- Institute for Materials Science, Faculty of Engineering, University of Kiel, D‑24143 Kiel, Germany
| | - Wolfram Mittelmeier
- Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, University Medicine Rostock, D‑18057 Rostock, Germany
| | - Eckhard Quandt
- Institute for Materials Science, Faculty of Engineering, University of Kiel, D‑24143 Kiel, Germany
| | - Bernd Kreikemeyer
- Institute of Medical Microbiology, Virology and Hygiene, University Medicine Rostock, D‑18057 Rostock, Germany
| | - Rainer Bader
- Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, University Medicine Rostock, D‑18057 Rostock, Germany
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13
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Co-Culture of S. epidermidis and Human Osteoblasts on Implant Surfaces: An Advanced In Vitro Model for Implant-Associated Infections. PLoS One 2016; 11:e0151534. [PMID: 26982194 PMCID: PMC4794246 DOI: 10.1371/journal.pone.0151534] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 02/28/2016] [Indexed: 12/29/2022] Open
Abstract
Objectives Total joint arthroplasty is one of the most frequent and effective surgeries today. However, despite improved surgical techniques, a significant number of implant-associated infections still occur. Suitable in vitro models are needed to test potential approaches to prevent infection. In the present study, we aimed to establish an in vitro co-culture setup of human primary osteoblasts and S. epidermidis to model the onset of implant-associated infections, and to analyze antimicrobial implant surfaces and coatings. Materials and Methods For initial surface adhesion, human primary osteoblasts (hOB) were grown for 24 hours on test sample discs made of polystyrene, titanium alloy Ti6Al4V, bone cement PALACOS R®, and PALACOS R® loaded with antibiotics. Co-cultures were performed as a single-species infection on the osteoblasts with S. epidermidis (multiplicity of infection of 0.04), and were incubated for 2 and 7 days under aerobic conditions. Planktonic S. epidermidis was quantified by centrifugation and determination of colony-forming units (CFU). The quantification of biofilm-bound S. epidermidis on the test samples was performed by sonication and CFU counting. Quantification of adherent and vital primary osteoblasts on the test samples was performed by trypan-blue staining and counting. Scanning electron microscopy was used for evaluation of topography and composition of the species on the sample surfaces. Results After 2 days, we observed approximately 104 CFU/ml biofilm-bound S. epidermidis (103 CFU/ml initial population) on the antibiotics-loaded bone cement samples in the presence of hOB, while no bacteria were detected without hOB. No biofilm-bound bacteria were detectable after 7 days in either case. Similar levels of planktonic bacteria were observed on day 2 with and without hOB. After 7 days, about 105 CFU/ml planktonic bacteria were present, but only in the absence of hOB. Further, no bacteria were observed within the biofilm, while the number of hOB was decreased to 10% of its initial value compared to 150% in the mono-culture of hOB. Conclusion We developed a co-culture setup that serves as a more comprehensive in vitro model for the onset of implant-associated infections and provides a test method for antimicrobial implant materials and coatings. We demonstrate that observations can be made that are unavailable from mono-culture experiments.
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14
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del Mercato LL, Moffa M, Rinaldi R, Pisignano D. Ratiometric Organic Fibers for Localized and Reversible Ion Sensing with Micrometer-Scale Spatial Resolution. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:6417-24. [PMID: 26539625 PMCID: PMC4738409 DOI: 10.1002/smll.201502171] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 09/09/2015] [Indexed: 05/21/2023]
Abstract
A fundamental issue in biomedical and environmental sciences is the development of sensitive and robust sensors able to probe the analyte of interest, under physiological and pathological conditions or in environmental samples, and with very high spatial resolution. In this work, novel hybrid organic fibers that can effectively report the analyte concentration within the local microenvironment are reported. The nanostructured and flexible wires are prepared by embedding fluorescent pH sensors based on seminaphtho-rhodafluor-1-dextran conjugate. By adjusting capsule/polymer ratio and spinning conditions, the diameter of the fibers and the alignment of the reporting capsules are both tuned. The hybrid wires display excellent stability, high sensitivity, as well as reversible response, and their operation relies on effective diffusional kinetic coupling of the sensing regions and the embedding polymer matrix. These devices are believed to be a powerful new sensing platform for clinical diagnostics, bioassays and environmental monitoring.
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Affiliation(s)
- Loretta L del Mercato
- CNR NANOTEC-Istitute of Nanotechnology, c/o Campus Ecotekne, Università del Salento, via Monteroni, 73100, Lecce, Italy
| | - Maria Moffa
- Istituto Nanoscienze-CNR, Euromediterranean Center for Nanomaterial Modelling and Technology (ECMT), via Arnesano, 73100, Lecce, Italy
| | - Rosaria Rinaldi
- Istituto Nanoscienze-CNR, Euromediterranean Center for Nanomaterial Modelling and Technology (ECMT), via Arnesano, 73100, Lecce, Italy
- Dipartimento di Matematica e Fisica "Ennio De Giorgi", Università del Salento, via Arnesano, 73100, Lecce, Italy
| | - Dario Pisignano
- Istituto Nanoscienze-CNR, Euromediterranean Center for Nanomaterial Modelling and Technology (ECMT), via Arnesano, 73100, Lecce, Italy
- Dipartimento di Matematica e Fisica "Ennio De Giorgi", Università del Salento, via Arnesano, 73100, Lecce, Italy
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15
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Cellular Nutrition in Complex Three-Dimensional Scaffolds: A Comparison between Experiments and Computer Simulations. Int J Biomater 2015; 2015:584362. [PMID: 26539216 PMCID: PMC4619933 DOI: 10.1155/2015/584362] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Accepted: 08/30/2015] [Indexed: 12/22/2022] Open
Abstract
Studies on bone cell ingrowth into synthetic, porous three-dimensional (3D) implants showed difficulties arising from impaired cellular proliferation and differentiation in the core region of these scaffolds with increasing scaffold volume in vitro. Therefore, we developed an in vitro perfusion cell culture module, which allows the analysis of cells in the interior of scaffolds under different medium flow rates. For each flow rate the cell viability was measured and compared with results from computer simulations that predict the local oxygen supply and shear stress inside the scaffold based on the finite element method. We found that the local cell viability correlates with the local oxygen concentration and the local shear stress. On the one hand the oxygen supply of the cells in the core becomes optimal with a higher perfusion flow. On the other hand shear stress caused by high flow rates impedes cell vitality, especially at the surface of the scaffold. Our results demonstrate that both parameters must be considered to derive an optimal nutrient flow rate.
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16
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Weyand B, Nöhre M, Schmälzlin E, Stolz M, Israelowitz M, Gille C, von Schroeder HP, Reimers K, Vogt PM. Noninvasive Oxygen Monitoring in Three-Dimensional Tissue Cultures Under Static and Dynamic Culture Conditions. Biores Open Access 2015; 4:266-77. [PMID: 26309802 PMCID: PMC4497672 DOI: 10.1089/biores.2015.0004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
We present a new method for noninvasive real-time oxygen measurement inside three-dimensional tissue-engineered cell constructs in static and dynamic culture settings in a laminar flow bioreactor. The OPAL system (optical oxygen measurement system) determines the oxygen-dependent phosphorescence lifetime of spherical microprobes and uses a two-frequency phase-modulation technique, which fades out the interference of background fluorescence from the cell carrier and culture medium. Higher cell densities in the centrum of the scaffolds correlated with lower values of oxygen concentration obtained with the OPAL system. When scaffolds were placed in the bioreactor, higher oxygen values were measured compared to statically cultured scaffolds in a Petri dish, which were significantly different at day 1-3 of culture. This technique allows the use of signal-weak microprobes in biological environments and monitors the culture process inside a bioreactor.
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Affiliation(s)
- Birgit Weyand
- Department of Plastic, Hand and Reconstructive Surgery, Hannover Medical School , Hannover, Germany
| | - Mariel Nöhre
- Department of Plastic, Hand and Reconstructive Surgery, Hannover Medical School , Hannover, Germany
| | | | | | | | | | - Herb P von Schroeder
- Biomimetics Technologies, Inc. , Toronto, Canada . ; University Hand Program and Bone Lab, Department of Surgery, University of Toronto , Toronto, Canada
| | - Kerstin Reimers
- Department of Plastic, Hand and Reconstructive Surgery, Hannover Medical School , Hannover, Germany
| | - Peter M Vogt
- Department of Plastic, Hand and Reconstructive Surgery, Hannover Medical School , Hannover, Germany
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17
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Lehmann R, Gallert C, Roddelkopf T, Junginger S, Wree A, Thurow K. 3 dimensional cell cultures: a comparison between manually and automatically produced alginate beads. Cytotechnology 2015; 68:1049-62. [PMID: 25842191 DOI: 10.1007/s10616-015-9861-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 02/13/2015] [Indexed: 01/12/2023] Open
Abstract
Cancer diseases are a common problem of the population caused by age and increased harmful environmental influences. Herein, new therapeutic strategies and compound screenings are necessary. The regular 2D cultivation has to be replaced by three dimensional cell culturing (3D) for better simulation of in vivo conditions. The 3D cultivation with alginate matrix is an appropriate method for encapsulate cells to form cancer constructs. The automated manufacturing of alginate beads might be an ultimate method for large-scaled manufacturing constructs similar to cancer tissue. The aim of this study was the integration of full automated systems for the production, cultivation and screening of 3D cell cultures. We compared the automated methods with the regular manual processes. Furthermore, we investigated the influence of antibiotics on these 3D cell culture systems. The alginate beads were formed by automated and manual procedures. The automated steps were processes by the Biomek(®) Cell Workstation (celisca, Rostock, Germany). The proliferation and toxicity were manually and automatically evaluated at day 14 and 35 of cultivation. The results visualized an accumulation and expansion of cell aggregates over the period of incubation. However, the proliferation and toxicity were faintly and partly significantly decreased on day 35 compared to day 14. The comparison of the manual and automated methods displayed similar results. We conclude that the manual production process could be replaced by the automation. Using automation, 3D cell cultures can be produced in industrial scale and improve the drug development and screening to treat serious illnesses like cancer.
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Affiliation(s)
- R Lehmann
- Center for Life Science Automation (celisca), University of Rostock, Friedrich-Barnewitz Str. 8, 18119, Rostock, Germany.
| | - C Gallert
- Center for Life Science Automation (celisca), University of Rostock, Friedrich-Barnewitz Str. 8, 18119, Rostock, Germany
| | - T Roddelkopf
- Center for Life Science Automation (celisca), University of Rostock, Friedrich-Barnewitz Str. 8, 18119, Rostock, Germany
| | - S Junginger
- Institute of Automation, University Rostock, Rostock, Germany
| | - A Wree
- Institute of Anatomy, University Rostock, Rostock, Germany
| | - K Thurow
- Center for Life Science Automation (celisca), University of Rostock, Friedrich-Barnewitz Str. 8, 18119, Rostock, Germany
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18
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Additively manufactured porous tantalum implants. Acta Biomater 2015; 14:217-25. [PMID: 25500631 DOI: 10.1016/j.actbio.2014.12.003] [Citation(s) in RCA: 144] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Revised: 11/25/2014] [Accepted: 12/04/2014] [Indexed: 12/27/2022]
Abstract
The medical device industry's interest in open porous, metallic biomaterials has increased in response to additive manufacturing techniques enabling the production of complex shapes that cannot be produced with conventional techniques. Tantalum is an important metal for medical devices because of its good biocompatibility. In this study selective laser melting technology was used for the first time to manufacture highly porous pure tantalum implants with fully interconnected open pores. The architecture of the porous structure in combination with the material properties of tantalum result in mechanical properties close to those of human bone and allow for bone ingrowth. The bone regeneration performance of the porous tantalum was evaluated in vivo using an orthotopic load-bearing bone defect model in the rat femur. After 12 weeks, substantial bone ingrowth, good quality of the regenerated bone and a strong, functional implant-bone interface connection were observed. Compared to identical porous Ti-6Al-4V structures, laser-melted tantalum shows excellent osteoconductive properties, has a higher normalized fatigue strength and allows for more plastic deformation due to its high ductility. It is therefore concluded that this is a first step towards a new generation of open porous tantalum implants manufactured using selective laser melting.
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19
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Wang Q, Zhang H, Li Q, Ye L, Gan H, Liu Y, Wang H, Wang Z. Biocompatibility and osteogenic properties of porous tantalum. Exp Ther Med 2015; 9:780-786. [PMID: 25667628 PMCID: PMC4316955 DOI: 10.3892/etm.2015.2208] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 12/22/2014] [Indexed: 12/22/2022] Open
Abstract
Porous tantalum has been reported to be a promising material for use in bone tissue engineering. In the present study, the biocompatibility and osteogenic properties of porous tantalum were studied in vitro and in vivo. The morphology of porous tantalum was observed using scanning electron microscopy (SEM). Osteoblasts were cultured with porous tantalum, and cell morphology, adhesion and proliferation were investigated using optical microscopy and SEM. In addition, porous tantalum rods were implanted in rabbits, and osteogenesis was observed using laser scanning confocal microscopy and hard tissue slice examination. The osteoblasts were observed to proliferate over time and adhere to the tantalum surface and pore walls, exhibiting a variety of shapes and intercellular connections. The porous tantalum rod connected tightly with the host bone. At weeks 2 and 4 following implantation, new bone and small blood vessels were observed at the tantalum-host bone interface and pores. At week 10 after the porous tantalum implantation, new bone tissue was observed at the tantalum-host bone interface and pores. By week 12, the tantalum-host bone interface and pores were covered with new bone tissue and the bone trabeculae had matured and connected directly with the materials. Therefore, the results of the present study indicate that porous tantalum is non-toxic, biocompatible and a promising material for use in bone tissue engineering applications.
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Affiliation(s)
- Qian Wang
- Graduate School, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China ; Department of Anatomy, Basic Medical College, Hebei United University, Tangshan, Hebei 063000, P.R. China
| | - Hui Zhang
- Graduate School, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China ; Department of Joint Surgery, The Second Hospital of Tangshan, Tangshan, Hebei 063000, P.R. China
| | - Qijia Li
- Experimental Center, Hebei United University, Tangshan, Hebei 063000, P.R. China
| | - Lei Ye
- Chongqing Runze Pharmaceutical Co. Ltd., Chongqing 401120, P.R. China
| | - Hongquan Gan
- Department of Orthopedics, Affiliated Hospital of Hebei United University, Tangshan, Hebei 063000, P.R. China
| | - Yingjie Liu
- Department of Orthopedics, Affiliated Hospital of Hebei United University, Tangshan, Hebei 063000, P.R. China
| | - Hui Wang
- Graduate School, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China ; Department of Hand Surgery, The Second Hospital of Tangshan, Tangshan, Hebei 063000, P.R. China
| | - Zhiqiang Wang
- Graduate School, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China ; Department of Orthopedics, Affiliated Hospital of Hebei United University, Tangshan, Hebei 063000, P.R. China
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20
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Liu Y, Bao C, Wismeijer D, Wu G. The physicochemical/biological properties of porous tantalum and the potential surface modification techniques to improve its clinical application in dental implantology. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 49:323-329. [PMID: 25686956 DOI: 10.1016/j.msec.2015.01.007] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2014] [Revised: 12/11/2014] [Accepted: 01/04/2015] [Indexed: 02/05/2023]
Abstract
More rapid restoration and more rigid functionality have been pursued for decades in the field of dental implantology. Under such motivation, porous tantalum has been recently introduced to design a novel type of dental implant. Porous tantalum bears interconnected porous structure with pore size ranging from 300 to 600μm and a porosity of 75-85%. Its elastic modulus (1.3-10GPa) more closely approximates that of natural cortical (12-18GPa) and cancellous bone (0.1-0.5GPa) in comparison with the most commonly used dental materials, such as titanium and titanium alloy (106-115GPa). Porous tantalum is highly corrosion-resistant and biocompatible. It can significantly enhance the proliferation and differentiation of primary osteoblasts derived from elderly people than titanium. Porous tantalum can allow bone ingrowth and establish not only osseointegration but also osseoincorporation, which will significantly enhance the secondary stability of implants in bone tissue. In this review, we summarize the physicochemical, mechanical and biological properties of porous tantalum. We further discuss the performance of current tantalum dental implants and present the methodologies of surface modifications in order to improve their biological performance.
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Affiliation(s)
- Yindong Liu
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Chongyun Bao
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
| | - Daniel Wismeijer
- Department of Oral Implantology and Prosthetic Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), MOVE Research Institute Amsterdam, VU University Amsterdam and University of Amsterdam, Amsterdam, The Netherlands
| | - Gang Wu
- Department of Oral Implantology and Prosthetic Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), MOVE Research Institute Amsterdam, VU University Amsterdam and University of Amsterdam, Amsterdam, The Netherlands.
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21
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Pretreatment with mechano-growth factor E peptide protects bone marrow mesenchymal cells against damage by fluid shear stress. Biotechnol Lett 2014; 36:2559-69. [PMID: 25129046 DOI: 10.1007/s10529-014-1625-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Accepted: 08/06/2014] [Indexed: 01/16/2023]
Abstract
Improper fluid shear stress (FSS) can cause serious damages to bone marrow mesenchymal stem cells (MSCs). Mechano-growth factor (MGF) E peptide pretreatment was proposed to protect MSCs against FSS damage in this study. MSCs were exposed to FSS for 30 min after they were pretreated with MGF E peptide for 24 h. Then, the effects of MGF E peptide on the viability, proliferation and cell apoptosis of MSCs were investigated. MGF E peptide pretreatment could recover the cellular metabolic activity of MSCs reduced by 72 dyne cm(-2) FSS and had a synergistic effect with FSS on the cellular metabolic viability of MSCs under 24 and 72 dyne cm(-2) FSS. These results suggested that MGF E peptide pretreatment could be an effective method for the protection of FSS damage in bone tissue engineering.
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22
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Heylman CM, Santoso S, Krebs MD, Saidel GM, Alsberg E, Muschler GF. Modeling and experimental methods to predict oxygen distribution in bone defects following cell transplantation. Med Biol Eng Comput 2013; 52:321-30. [DOI: 10.1007/s11517-013-1133-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2013] [Accepted: 12/13/2013] [Indexed: 11/24/2022]
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23
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Beck-Broichsitter BE, Christofzik DW, Daschner F, Knöchel R, Smeets R, Warnke P, Wiltfang J, Becker ST. Endocultivation: Metabolism During Heterotopic Osteoinduction In Vivo—Monitoring with Fiber Optic Detection Devices. Tissue Eng Part C Methods 2012; 18:740-6. [DOI: 10.1089/ten.tec.2011.0641] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
| | - David W. Christofzik
- Department of Conservative Dentistry, Christian Albrechts University, Kiel, Germany
| | - Frank Daschner
- Microwave Laboratory, Faculty of Engineering, Christian Albrechts University, Kiel, Germany
| | - Reinhard Knöchel
- Microwave Laboratory, Faculty of Engineering, Christian Albrechts University, Kiel, Germany
| | - Ralf Smeets
- Department of Oral and Maxillofacial Surgery, Hamburg University, Hamburg, Germany
| | - Patrick Warnke
- Faculty of Health Sciences and Medicine, Bond University, Gold Coast, Australia
| | - Jörg Wiltfang
- Department of Oral and Maxillofacial Surgery, Christian Albrechts University, Kiel, Germany
| | - Stephan T. Becker
- Department of Oral and Maxillofacial Surgery, Christian Albrechts University, Kiel, Germany
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24
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Szpalski C, Wetterau M, Barr J, Warren SM. Bone tissue engineering: current strategies and techniques--part I: Scaffolds. TISSUE ENGINEERING PART B-REVIEWS 2012; 18:246-57. [PMID: 22029448 DOI: 10.1089/ten.teb.2011.0427] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Bone repair and regeneration is a dynamic process that involves a complex interplay between the (1) ground substance, (2) cells, and (3) milieu. While each constituent is integral to the final product, it is often helpful to consider each component individually. Therefore, we created a two-part review to examine scaffolds and cells' roles in bone tissue engineering. In Part I, we review the myriad of materials use for in vivo bone engineering. In Part II, we discuss the variety cell types (e.g., osteocytes, osteoblasts, osteoclasts, chondrocytes, mesenchymal stem cells, and vasculogenic cells) that are seeded upon or recruited to these scaffolds. In Part III, we discuss the optimization of the microenvironment. The biochemical processes and sequence of events that guide matrix production, cellular activation, and ossification are vital to developing successful bone tissue engineering strategies and are thus succinctly reviewed herein.
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Affiliation(s)
- Caroline Szpalski
- Department of Plastic Surgery, Institute of Reconstructive Plastic Surgery Laboratory, New York, New York, USA
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