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Waletzko-Hellwig J, Sass JO, Bader R, Frerich B, Dau M. Evaluation of Integrity of Allogeneic Bone Processed with High Hydrostatic Pressure: A Pilot Animal Study. Biomater Res 2024; 28:0067. [PMID: 39148817 PMCID: PMC11325089 DOI: 10.34133/bmr.0067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Accepted: 07/29/2024] [Indexed: 08/17/2024] Open
Abstract
Processing of bone allografts with strong acids and γ-sterilization results in decreased biomechanical properties and reduction in osteogenecity and osteoconductivity. High hydrostatic pressure (HHP) treatment could be a gentle alternative to processing techniques usually applied. HHP is known to induce devitalization of cancellous bone while preserving biomechanical stability and molecules that induce cell differentiation. Here, a specific HHP protocol for devitalization of cancellous bone was applied to rabbit femoral bone. Allogeneic bone cylinders were subsequently implanted into a defect in the lateral condyles of rabbit femora and were compared to autologous bone grafts. Analysis of bone integration 4 and 12 weeks postoperatively revealed no differences between autografts and HHP-treated allografts regarding the expression of genes characteristic for bone remodeling, showing expression niveous comparable to original bone cylinder. Furthermore, biomechanical properties were evaluated 12 weeks postoperatively. Autografts and HHP-treated allografts both showed a yield strength ranging between 2 and 2.5 MPa and an average bone mass density of 250 mg/cm2. Furthermore, histological analysis of the region of interest revealed a rate of 5 to 10% BPM-2 and approximately 40% osteocalcin-positive staining, with no marked differences between allografts and autografts demonstrating comparable matrix deposition in the graft region. A suitable graft integrity was pointed out by μCT imaging in both groups, supporting the biomechanical data. In summary, the integrity of HHP-treated cancellous bone allografts showed similar results to untreated autografts. Hence, HHP treatment may represent a gentle and effective alternative to existing processing techniques for bone allografts.
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Affiliation(s)
- Janine Waletzko-Hellwig
- Department of Oral, Maxillofacial and Plastic Surgery, Rostock University Medical Center, 18057 Rostock, Germany
- Research Laboratory for Biomechanics and Implant Technology, Department of Orthopaedics, Rostock University Medical Center, 18057 Rostock, Germany
| | - Jan-Oliver Sass
- Research Laboratory for Biomechanics and Implant Technology, Department of Orthopaedics, Rostock University Medical Center, 18057 Rostock, Germany
| | - Rainer Bader
- Research Laboratory for Biomechanics and Implant Technology, Department of Orthopaedics, Rostock University Medical Center, 18057 Rostock, Germany
| | - Bernhard Frerich
- Department of Oral, Maxillofacial and Plastic Surgery, Rostock University Medical Center, 18057 Rostock, Germany
| | - Michael Dau
- Department of Oral, Maxillofacial and Plastic Surgery, Rostock University Medical Center, 18057 Rostock, Germany
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2
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Yuan Y, Tyson C, Szyniec A, Agro S, Tavakol TN, Harmon A, Lampkins D, Pearson L, Dumas JE, Taite LJ. Bioactive Polyurethane-Poly(ethylene Glycol) Diacrylate Hydrogels for Applications in Tissue Engineering. Gels 2024; 10:108. [PMID: 38391438 PMCID: PMC10887679 DOI: 10.3390/gels10020108] [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: 12/29/2023] [Revised: 01/22/2024] [Accepted: 01/25/2024] [Indexed: 02/24/2024] Open
Abstract
Polyurethanes (PUs) are a highly adaptable class of biomaterials that are among some of the most researched materials for various biomedical applications. However, engineered tissue scaffolds composed of PU have not found their way into clinical application, mainly due to the difficulty of balancing the control of material properties with the desired cellular response. A simple method for the synthesis of tunable bioactive poly(ethylene glycol) diacrylate (PEGDA) hydrogels containing photocurable PU is described. These hydrogels may be modified with PEGylated peptides or proteins to impart variable biological functions, and the mechanical properties of the hydrogels can be tuned based on the ratios of PU and PEGDA. Studies with human cells revealed that PU-PEG blended hydrogels support cell adhesion and viability when cell adhesion peptides are crosslinked within the hydrogel matrix. These hydrogels represent a unique and highly tailorable system for synthesizing PU-based synthetic extracellular matrices for tissue engineering applications.
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Affiliation(s)
- Yixuan Yuan
- Department of Chemical Engineering, University of Virginia, Charlottesville, VA 22903, USA
| | - Caleb Tyson
- Department of Chemical Engineering, Hampton University, Hampton, VA 23668, USA
| | - Annika Szyniec
- Department of Chemical Engineering, University of Virginia, Charlottesville, VA 22903, USA
| | - Samuel Agro
- Department of Chemical Engineering, University of Virginia, Charlottesville, VA 22903, USA
| | - Tara N Tavakol
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA 22908, USA
| | - Alexander Harmon
- Department of Chemical Engineering, Hampton University, Hampton, VA 23668, USA
| | - DessaRae Lampkins
- Department of Chemical Engineering, Hampton University, Hampton, VA 23668, USA
| | - Lauran Pearson
- Department of Chemical Engineering, Hampton University, Hampton, VA 23668, USA
| | - Jerald E Dumas
- Joint School of Nanoscience and Nanoengineering, North Carolina Agricultural & Technical State University, Greensboro, NC 27401, USA
| | - Lakeshia J Taite
- Department of Chemical Engineering, University of Virginia, Charlottesville, VA 22903, USA
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Szczepańczyk P, Szlachta M, Złocista-Szewczyk N, Chłopek J, Pielichowska K. Recent Developments in Polyurethane-Based Materials for Bone Tissue Engineering. Polymers (Basel) 2021; 13:polym13060946. [PMID: 33808689 PMCID: PMC8003502 DOI: 10.3390/polym13060946] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 02/24/2021] [Accepted: 02/25/2021] [Indexed: 11/16/2022] Open
Abstract
To meet the needs of clinical medicine, bone tissue engineering is developing dynamically. Scaffolds for bone healing might be used as solid, preformed scaffolding materials, or through the injection of a solidifiable precursor into the defective tissue. There are miscellaneous biomaterials used to stimulate bone repair including ceramics, metals, naturally derived polymers, synthetic polymers, and other biocompatible substances. Combining ceramics and metals or polymers holds promise for future cures as the materials complement each other. Further research must explain the limitations of the size of the defects of each scaffold, and additionally, check the possibility of regeneration after implantation and resistance to disease. Before tissue engineering, a lot of bone defects were treated with autogenous bone grafts. Biodegradable polymers are widely applied as porous scaffolds in bone tissue engineering. The most valuable features of biodegradable polyurethanes are good biocompatibility, bioactivity, bioconductivity, and injectability. They may also be used as temporary extracellular matrix (ECM) in bone tissue healing and regeneration. Herein, the current state concerning polyurethanes in bone tissue engineering are discussed and introduced, as well as future trends.
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Touny AH, Saleh MM, Abd El-Lateef HM, Saleh MM. Electrochemical methods for fabrication of polymers/calcium phosphates nanocomposites as hard tissue implants. APPLIED PHYSICS REVIEWS 2019; 6. [DOI: 10.1063/1.5045339] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Developing and manipulating new biomaterials is an ongoing topic for their needs in medical uses. The evolution and development of new biomaterials, in both the academic and industrial sectors, have been encouraged due to the dramatic improvement in medicine and medical-related technologies. Due to the drawbacks associated with natural biomaterials, the use of synthetic biomaterials is preferential due to basic and applied aspects. Various techniques are involved in fabricating biomaterials. Among them are the electrochemical-based methods, which include electrodeposition and electrophoretic methods. Although electrospinning and electrospraying are not typical electrochemical methods, they are also reviewed in this article due to their importance. Many remarkable features can be acquired from this technique. Electrodeposition and electrophoretic deposition are exceptional and valuable processes for fabricating thin or thick coated films on a surface of metallic implants. Electrodeposition and electrophoretic deposition have some common positive features. They can be used at low temperatures, do not affect the structure of the implant, and can be applied to complex shapes, and they can produce superior properties, such as quick and uniform coating. Furthermore, they can possibly control the thickness and chemical composition of the coatings. Electrospinning is a potentially emerging and efficient process for producing materials with nanofibrous structures, which have exceptional characteristics such as mechanical properties, pore size, and superior surface area. These specialized characteristics induce these nanostructured materials to be used in different technologies.
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Affiliation(s)
- Ahmed H. Touny
- Department of Chemistry, Faculty of Science, King Faisal University 1 , Al-Hassa, Saudi Arabia
- Department of Chemistry, Faculty of Science, Helwan University 2 , Helwan, Egypt
| | - Mohamed M. Saleh
- Wake Forest Institute for Regenerative Medicine 3 , Winston Salem, North Carolina 27103, USA
| | - Hany M. Abd El-Lateef
- Department of Chemistry, Faculty of Science, King Faisal University 1 , Al-Hassa, Saudi Arabia
- Chemistry Department, College of Science, Sohag University 4 , Sohag, Egypt
| | - Mahmoud M. Saleh
- Department of Chemistry, Faculty of Science, Cairo University 5 , Cairo, Egypt
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Lu S, McGough MAP, Shiels SM, Zienkiewicz KJ, Merkel AR, Vanderburgh JP, Nyman JS, Sterling JA, Tennent DJ, Wenke JC, Guelcher SA. Settable polymer/ceramic composite bone grafts stabilize weight-bearing tibial plateau slot defects and integrate with host bone in an ovine model. Biomaterials 2018; 179:29-45. [PMID: 29960822 PMCID: PMC6065109 DOI: 10.1016/j.biomaterials.2018.06.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 06/20/2018] [Accepted: 06/21/2018] [Indexed: 11/16/2022]
Abstract
Bone fractures at weight-bearing sites are challenging to treat due to the difficulty in maintaining articular congruency. An ideal biomaterial for fracture repair near articulating joints sets rapidly after implantation, stabilizes the fracture with minimal rigid implants, stimulates new bone formation, and remodels at a rate that maintains osseous integrity. Consequently, the design of biomaterials that mechanically stabilize fractures while remodeling to form new bone is an unmet challenge in bone tissue engineering. In this study, we investigated remodeling of resorbable bone cements in a stringent model of mechanically loaded tibial plateau defects in sheep. Nanocrystalline hydroxyapatite-poly(ester urethane) (nHA-PEUR) hybrid polymers were augmented with either ceramic granules (85% β-tricalcium phosphate/15% hydroxyapatite, CG) or a blend of CG and bioactive glass (BG) particles to form a settable bone cement. The initial compressive strength and fatigue properties of the cements were comparable to those of non-resorbable poly(methyl methacrylate) bone cement. In animals that tolerated the initial few weeks of early weight-bearing, CG/nHA-PEUR cements mechanically stabilized the tibial plateau defects and remodeled to form new bone at 16 weeks. In contrast, cements incorporating BG particles resorbed with fibrous tissue filling the defect. Furthermore, CG/nHA-PEUR cements remodeled significantly faster at the full weight-bearing tibial plateau site compared to the mechanically protected femoral condyle site in the same animal. These findings are the first to report a settable bone cement that remodels to form new bone while providing mechanical stability in a stringent large animal model of weight-bearing bone defects near an articulating joint.
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Affiliation(s)
- Sichang Lu
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, 37235, USA
| | - Madison A P McGough
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, 37235, USA
| | - Stefanie M Shiels
- Extremity Trauma and Regenerative Medicine Task Area, U.S. Army Institute of Surgical Research, Fort Sam Houston, TX, USA
| | - Katarzyna J Zienkiewicz
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, 37235, USA
| | - Alyssa R Merkel
- Center for Bone Biology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, 37235, USA; Department of Veterans Affairs, Nashville, TN, USA
| | - Joseph P Vanderburgh
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, 37235, USA
| | - Jeffry S Nyman
- Center for Bone Biology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, 37235, USA; Department of Orthopedic Surgery and Rehabilitation, Vanderbilt University Medical Center, Nashville, TN, 37235, USA
| | - Julie A Sterling
- Center for Bone Biology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, 37235, USA; Department of Veterans Affairs, Nashville, TN, USA
| | - David J Tennent
- Extremity Trauma and Regenerative Medicine Task Area, U.S. Army Institute of Surgical Research, Fort Sam Houston, TX, USA
| | - Joseph C Wenke
- Extremity Trauma and Regenerative Medicine Task Area, U.S. Army Institute of Surgical Research, Fort Sam Houston, TX, USA
| | - Scott A Guelcher
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, 37235, USA; Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, 37235, USA; Center for Bone Biology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, 37235, USA.
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Shoaib M, Bahadur A, Saeed A, Rahman MSU, Naseer MM. Biocompatible, pH-responsive, and biodegradable polyurethanes as smart anti-cancer drug delivery carriers. REACT FUNCT POLYM 2018. [DOI: 10.1016/j.reactfunctpolym.2018.04.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Marzec M, Kucińska-Lipka J, Kalaszczyńska I, Janik H. Development of polyurethanes for bone repair. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 80:736-747. [PMID: 28866223 DOI: 10.1016/j.msec.2017.07.047] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 01/23/2017] [Accepted: 07/29/2017] [Indexed: 12/12/2022]
Abstract
The purpose of this paper is to review recent developments on polyurethanes aimed at the design, synthesis, modifications, and biological properties in the field of bone tissue engineering. Different polyurethane systems are presented and discussed in terms of biodegradation, biocompatibility and bioactivity. A comprehensive discussion is provided of the influence of hard to soft segments ratio, catalysts, stiffness and hydrophilicity of polyurethanes. Interaction with various cells, behavior in vivo and current strategies in enhancing bioactivity of polyurethanes are described. The discussion on the incorporation of biomolecules and growth factors, surface modifications, and obtaining polyurethane-ceramics composites strategies is held. The main emphasis is placed on the progress of polyurethane applications in bone regeneration, including bone void fillers, shape memory scaffolds, and drug carrier.
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Affiliation(s)
- M Marzec
- Department of Polymer Technology, Faculty of Chemistry, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland
| | - J Kucińska-Lipka
- Department of Polymer Technology, Faculty of Chemistry, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland.
| | - I Kalaszczyńska
- Department of Histology and Embryology, Center for Biostructure Research, Medical University of Warsaw, Chalubinskiego 5, 02-004 Warsaw, Poland; Centre for Preclinical Research and Technology, Banacha 1b, 02-097 Warsaw, Poland
| | - H Janik
- Department of Polymer Technology, Faculty of Chemistry, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland
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Lu S, McEnery MAP, Rogers BR, Wenke JC, Shimko D, Guelcher SA. Resorbable Nanocomposites with Bone-Like Strength and Enhanced Cellular Activity. J Mater Chem B 2017; 5:4198-4206. [PMID: 30101031 PMCID: PMC6086367 DOI: 10.1039/c7tb00657h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Bone cements for treatment of fractures at weight-bearing sites are subjected to dynamic physiological loading from daily activities. An ideal bone cement rapidly sets after injection, exhibits bone-like strength, stimulates osteogenic differentiation of endogenous cells, and resorbs at a rate aligned with patient biology. However, currently available materials fall short of these targeted properties. Nanocrystalline hydroxyapatite (nHA) enhances osteogenic differentiation, new bone formation, and osteoclast differentiation activity compared to amorphous or micron-scale crystalline hydroxyapatite. However, the brittle mechanical properties of nHA precludes its use in treatment of weight-bearing bone defects. In this study, we report settable nHA-poly(ester urethane) (PEUR) nanocomposites synthesized from nHA, lysine triisocyanate (LTI), and poly(caprolactone) triol via a solvent-free process. The nanocomposites are easily mixed and injected using a double-barrel syringe, exhibit mechanical properties exceeding those of conventional bone cements, enhance mineralization of osteoprogenitor cells in vitro, and undergo osteoclast-mediated degradation in vitro. This combination of properties cannot be achieved using other technologies, which underscores the potential of nHA-PEUR nanocomposites as a new approach for promoting bone healing at weight-bearing sites.
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Affiliation(s)
- S Lu
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, 37235, USA
| | - M A P McEnery
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, 37235, USA
| | - B R Rogers
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, 37235, USA
| | - J C Wenke
- Orthopaedic Task Area, U.S. Army Institute of Surgical Research, San Antonio, TX, USA
| | - D Shimko
- Medtronic Spine and Biologics, Memphis, TN, 38132, USA
| | - S A Guelcher
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, 37235, USA
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, 37235, USA
- Center for Bone Biology, Vanderbilt University Medical Center, Nashville, TN, 37235, USA
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10
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McEnery MAP, Lu S, Gupta MK, Zienkiewicz KJ, Wenke JC, Kalpakci KN, Shimko D, Duvall CL, Guelcher SA. Oxidatively Degradable Poly(thioketal urethane)/Ceramic Composite Bone Cements with Bone-Like Strength. RSC Adv 2016; 6:109414-109424. [PMID: 27895899 PMCID: PMC5123593 DOI: 10.1039/c6ra24642g] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Synthetic bone cements are commonly used in orthopaedic procedures to aid in bone regeneration following trauma or disease. Polymeric cements like PMMA provide the mechanical strength necessary for orthopaedic applications, but they are not resorbable and do not integrate with host bone. Ceramic cements have a chemical composition similar to that of bone, but their brittle mechanical properties limit their use in weight-bearing applications. In this study, we designed oxidatively degradable, polymeric bone cements with mechanical properties suitable for bone tissue engineering applications. We synthesized a novel thioketal (TK) diol, which was crosslinked with a lysine triisocyanate (LTI) prepolymer to create hydrolytically stable poly(thioketal urethane)s (PTKUR) that degrade in the oxidative environment associated with bone defects. PTKUR films were hydrolytically stable for up to 6 months, but degraded rapidly (<1 week) under simulated oxidative conditions in vitro. When combined with ceramic micro- or nanoparticles, PTKUR cements exhibited working times comparable to calcium phosphate cements and strengths exceeding those of trabecular bone. PTKUR/ceramic composite cements supported appositional bone growth and integrated with host bone near the bone-cement interface at 6 and 12 weeks post-implantation in rabbit femoral condyle plug defects. Histological evidence of osteoclast-mediated resorption of the cements was observed at 6 and 12 weeks. These findings demonstrate that a PTKUR bone cement with bone-like strength can be selectively resorbed by cells involved in bone remodeling, and thus represent an important initial step toward the development of resorbable bone cements for weight-bearing applications.
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Affiliation(s)
- Madison A P McEnery
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
| | - Sichang Lu
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA
| | - Mukesh K Gupta
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
| | - Katarzyna J Zienkiewicz
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA
| | - Joseph C Wenke
- U.S. Army Institute of Surgical Research, San Antonio, TX, USA
| | | | | | - Craig L Duvall
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
| | - Scott A Guelcher
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA; Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA; Center for Bone Biology, Vanderbilt University Medical Center, Nashville, TN
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11
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Talley AD, McEnery MA, Kalpakci KN, Zienkiewicz KJ, Shimko DA, Guelcher SA. Remodeling of injectable, low-viscosity polymer/ceramic bone grafts in a sheep femoral defect model. J Biomed Mater Res B Appl Biomater 2016; 105:2333-2343. [PMID: 27507599 DOI: 10.1002/jbm.b.33767] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 07/03/2016] [Accepted: 07/23/2016] [Indexed: 01/20/2023]
Abstract
Ceramic/polymer composite bone grafts offer the potential advantage of combining the osteoconductivity of ceramic component with the ductility of polymeric component, resulting in a graft that meets many of the desired properties for bone void fillers (BVF). However, the relative contributions of the polymer and ceramic components to bone healing are not well understood. In this study, we compared remodeling of low-viscosity (LV) ceramic/poly(ester urethane) composites to a ceramic BVF control in a sheep femoral condyle plug defect model. LV composites incorporating either ceramic (LV/CM) or allograft bone (LV/A) particles were evaluated. We hypothesized that LV/CM composites which have the advantageous handling properties of injectability, flowability, and settability would heal comparably to the CM control, which was evaluated for up to 2 years to study its long-term degradation properties. Remodeling of LV/CM was comparable to that observed for the CM control, as evidenced by new bone formation on the surface of the ceramic particles. At early time points (4 months), LV/CM composites healed similar to the ceramic clinical control, while LV/A components showed more variable healing due to osteoclast-mediated resorption of the allograft particles. At longer time points (12-15 months), healing of LV/CM composites was more variable due to the nonhomogeneous distribution and lower concentration of the ceramic particles compared to the ceramic clinical control. Resorption of the ceramic particles was almost complete at 2 years. This study highlights the importance of optimizing the loading and distribution of ceramic particles in polymer/ceramic composites to maximize bone healing. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 2333-2343, 2017.
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Affiliation(s)
- Anne D Talley
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee
| | - Madison A McEnery
- Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee
| | | | - Katarzyna J Zienkiewicz
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee
| | | | - Scott A Guelcher
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee.,Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee.,Center for Bone Biology, Vanderbilt University Medical Center, Nashville, Tennessee
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Rupnik S, Buwalda S, Dejean S, Bethry A, Garric X, Coudane J, Nottelet B. Redox Reducible and Hydrolytically Degradable PEG-PLA Elastomers as Biomaterial for Temporary Drug-Eluting Medical Devices. Macromol Biosci 2016; 16:1792-1802. [PMID: 27377673 DOI: 10.1002/mabi.201600132] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 05/23/2016] [Indexed: 11/06/2022]
Abstract
With the aim to develop biomaterials for temporary medical devices, a series of novel reducible and/or degradable elastomers has been prepared from PLA-b-PEG-b-PLA copolymers photo-crosslinked with diallyl sulfide or pentaerythritol tetrakis(3-mercaptopropionate). Thermal and mechanical properties, including elastic limit and Young modulus, are assessed. Degradation is then evaluated under standard hydrolytic conditions. Reducibility of a selected elastomer is then illustrated using 2-mercaptoethanol or glutathione as reducing agents. The redox-sensitivity of the selected elastomer and the possibility to modulate the degradability are shown. Considering drug-eluting elastomeric devices applications, anti-inflammatory drug ibuprofen loading is illustrated with the two simplest elastomer formulations. A rapid or slow linear release is observed as a function of the low or high molecular weight of the triblock pre-polymers. Finally, the cytocompatibility of the degradable elastomers is assessed with regard to their potential to favor or inhibit L929 murine fibroblasts proliferation as a function of the hydrophilicity/hydrophobicity of the triblock copolymers.
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Affiliation(s)
- Simona Rupnik
- Institute of Biomolecules Max Mousseron (IBMM) UMR 5247, Department of Artificial Biopolymers, CNRS, University of Montpellier, ENSCM. Faculté de Pharmacie 15 avenue Charles Flahault BP14491, 34093, Montpellier CEDEX 5, France
| | - Sytze Buwalda
- Institute of Biomolecules Max Mousseron (IBMM) UMR 5247, Department of Artificial Biopolymers, CNRS, University of Montpellier, ENSCM. Faculté de Pharmacie 15 avenue Charles Flahault BP14491, 34093, Montpellier CEDEX 5, France
| | - Stéphane Dejean
- Institute of Biomolecules Max Mousseron (IBMM) UMR 5247, Department of Artificial Biopolymers, CNRS, University of Montpellier, ENSCM. Faculté de Pharmacie 15 avenue Charles Flahault BP14491, 34093, Montpellier CEDEX 5, France
| | - Audrey Bethry
- Institute of Biomolecules Max Mousseron (IBMM) UMR 5247, Department of Artificial Biopolymers, CNRS, University of Montpellier, ENSCM. Faculté de Pharmacie 15 avenue Charles Flahault BP14491, 34093, Montpellier CEDEX 5, France
| | - Xavier Garric
- Institute of Biomolecules Max Mousseron (IBMM) UMR 5247, Department of Artificial Biopolymers, CNRS, University of Montpellier, ENSCM. Faculté de Pharmacie 15 avenue Charles Flahault BP14491, 34093, Montpellier CEDEX 5, France
| | - Jean Coudane
- Institute of Biomolecules Max Mousseron (IBMM) UMR 5247, Department of Artificial Biopolymers, CNRS, University of Montpellier, ENSCM. Faculté de Pharmacie 15 avenue Charles Flahault BP14491, 34093, Montpellier CEDEX 5, France
| | - Benjamin Nottelet
- Institute of Biomolecules Max Mousseron (IBMM) UMR 5247, Department of Artificial Biopolymers, CNRS, University of Montpellier, ENSCM. Faculté de Pharmacie 15 avenue Charles Flahault BP14491, 34093, Montpellier CEDEX 5, France
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13
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Talley AD, Kalpakci KN, Shimko DA, Zienkiewicz KJ, Cochran DL, Guelcher SA. Effects of Recombinant Human Bone Morphogenetic Protein-2 Dose and Ceramic Composition on New Bone Formation and Space Maintenance in a Canine Mandibular Ridge Saddle Defect Model. Tissue Eng Part A 2016; 22:469-79. [PMID: 26800574 DOI: 10.1089/ten.tea.2015.0355] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Treatment of mandibular osseous defects is a significant clinical challenge. Maintenance of the height and width of the mandibular ridge is essential for placement of dental implants and restoration of normal dentition. While guided bone regeneration using protective membranes is an effective strategy for maintaining the anatomic contour of the ridge and promoting new bone formation, complications have been reported, including wound failure, seroma, and graft exposure leading to infection. In this study, we investigated injectable low-viscosity (LV) polyurethane/ceramic composites augmented with 100 μg/mL (low) or 400 μg/mL (high) recombinant human bone morphogenetic protein-2 (rhBMP-2) as space-maintaining bone grafts in a canine mandibular ridge saddle defect model. LV grafts were injected as a reactive paste that set in 5-10 min to form a solid porous composite with bulk modulus exceeding 1 MPa. We hypothesized that compression-resistant LV grafts would enhance new bone formation and maintain the anatomic contour of the mandibular ridge without the use of protective membranes. At the rhBMP-2 dose recommended for the absorbable collagen sponge carrier in dogs (400 μg/mL), LV grafts maintained the width and height of the host mandibular ridge and supported new bone formation, while at suboptimal (100 μg/mL) doses, the anatomic contour of the ridge was not maintained. These findings indicate that compression-resistant bone grafts with bulk moduli exceeding 1 MPa and rhBMP-2 doses comparable to that recommended for the collagen sponge carrier support new bone formation and maintain ridge height and width in mandibular ridge defects without protective membranes.
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Affiliation(s)
- Anne D Talley
- 1 Department of Chemical and Biomolecular Engineering, Vanderbilt University , Nashville, Tennessee
| | | | | | - Katarzyna J Zienkiewicz
- 1 Department of Chemical and Biomolecular Engineering, Vanderbilt University , Nashville, Tennessee
| | - David L Cochran
- 3 Department of Periodontics, University of Texas Health Science Center at San Antonio , San Antonio, Texas
| | - Scott A Guelcher
- 1 Department of Chemical and Biomolecular Engineering, Vanderbilt University , Nashville, Tennessee.,4 Department of Biomedical Engineering, Vanderbilt University , Nashville, Tennessee.,5 Center for Bone Biology, Vanderbilt University Medical Center , Nashville, Tennessee
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14
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Teo AJT, Mishra A, Park I, Kim YJ, Park WT, Yoon YJ. Polymeric Biomaterials for Medical Implants and Devices. ACS Biomater Sci Eng 2016; 2:454-472. [PMID: 33465850 DOI: 10.1021/acsbiomaterials.5b00429] [Citation(s) in RCA: 320] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
In this review article, we focus on the various types of materials used in biomedical implantable devices, including the polymeric materials used as substrates and for the packaging of such devices. Polymeric materials are used because of the ease of fabrication, flexibility, and their biocompatible nature as well as their wide range of mechanical, electrical, chemical, and thermal behaviors when combined with different materials as composites. Biocompatible and biostable polymers are extensively used to package implanted devices, with the main criteria that include gas permeability and water permeability of the packaging polymer to protect the electronic circuit of the device from moisture and ions inside the human body. Polymeric materials must also have considerable tensile strength and should be able to contain the device over the envisioned lifetime of the implant. For substrates, structural properties and, at times, electrical properties would be of greater concern. Section 1 gives an introduction of some medical devices and implants along with the material requirements and properties needed. Different synthetic polymeric materials such as polyvinylidene fluoride, polyethylene, polypropylene, polydimethylsiloxane, parylene, polyamide, polytetrafluoroethylene, poly(methyl methacrylate), polyimide, and polyurethane have been examined, and liquid crystalline polymers and nanocomposites have been evaluated as biomaterials that are suitable for biomedical packaging (section 2). A summary and glimpse of the future trend in this area has also been given (section 3). Materials and information used in this manuscript are adapted from papers published between 2010 and 2015 representing the most updated information available on each material.
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Affiliation(s)
- Adrian J T Teo
- School of Mechanical & Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| | - Abhinay Mishra
- School of Mechanical & Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| | - Inkyu Park
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea 305701
| | - Young-Jin Kim
- School of Mechanical & Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| | - Woo-Tae Park
- Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology, Seoul, Korea 139743
| | - Yong-Jin Yoon
- School of Mechanical & Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
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15
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Alishiri M, Shojaei A, Abdekhodaie MJ. Biodegradable polyurethane acrylate/HEMA-grafted nanodiamond composites with bone regenerative potential applications: structure, mechanical properties and biocompatibility. RSC Adv 2016. [DOI: 10.1039/c5ra19669h] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
It was found that ND-HEMA enhanced considerably the mechanical properties of biocompatible APUA at low concentrations, i.e. 1 wt%, while it retained the biocompatibility of the PAUA.
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Affiliation(s)
- Maryam Alishiri
- Department of Chemical and Petroleum Engineering
- Sharif University of Technology
- Tehran
- Iran
| | - Akbar Shojaei
- Department of Chemical and Petroleum Engineering
- Sharif University of Technology
- Tehran
- Iran
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16
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Harmata AJ, Uppuganti S, Granke M, Guelcher SA, Nyman JS. Compressive fatigue and fracture toughness behavior of injectable, settable bone cements. J Mech Behav Biomed Mater 2015; 51:345-55. [PMID: 26282077 DOI: 10.1016/j.jmbbm.2015.07.027] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Revised: 07/23/2015] [Accepted: 07/27/2015] [Indexed: 01/09/2023]
Abstract
Bone grafts used to repair weight-bearing tibial plateau fractures often experience cyclic loading, and there is a need for bone graft substitutes that prevent failure of fixation and subsequent morbidity. However, the specific mechanical properties required for resorbable grafts to optimize structural compatibility with native bone have yet to be established. While quasi-static tests are utilized to assess weight-bearing ability, compressive strength alone is a poor indicator of in vivo performance. In the present study, we investigated the effects of interfacial bonding on material properties under conditions that re-capitulate the cyclic loading associated with weight-bearing fractures. Dynamic compressive fatigue properties of polyurethane (PUR) composites made with either unmodified (U-) or polycaprolactone surface-modified (PCL-) 45S5 bioactive glass (BG) particles were compared to a commercially available calcium sulfate and phosphate-based (CaS/P) bone cement at physiologically relevant stresses (5-30 MPa). Fatigue resistance of PCL-BG/polymer composite was superior to that of the U-BG/polymer composite and the CaS/P cement at higher stress levels for each of the fatigue failure criteria, related to modulus, creep, and maximum displacement, and was comparable to human trabecular bone. Steady state creep and damage accumulation occurred during the fatigue life of the PCL-BG/polymer and CaS/P cement, whereas creep of U-BG/polymer primarily occurred at a low number of loading cycles. From crack propagation testing, fracture toughness or resistance to crack growth was significantly higher for the PCL-BG composite than for the other materials. Finally, the fatigue and fracture toughness properties were intermediate between those of trabecular and cortical bone. These findings highlight the potential of PCL-BG/polyurethane composites as weight-bearing bone grafts.
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Affiliation(s)
- Andrew J Harmata
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA; Center for Bone Biology, Vanderbilt University Medical Center, Nashville, TN, USA.
| | - Sasidhar Uppuganti
- Center for Bone Biology, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Orthopaedic Surgery and Rehabilitation, Vanderbilt University Medical Center, Nashville, TN, USA.
| | - Mathilde Granke
- Center for Bone Biology, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Orthopaedic Surgery and Rehabilitation, Vanderbilt University Medical Center, Nashville, TN, USA.
| | - Scott A Guelcher
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA; Center for Bone Biology, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA.
| | - Jeffry S Nyman
- Center for Bone Biology, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA; Department of Orthopaedic Surgery and Rehabilitation, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, TN 37212, USA.
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17
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Prieto EM, Talley AD, Gould NR, Zienkiewicz KJ, Drapeau SJ, Kalpakci KN, Guelcher SA. Effects of particle size and porosity on in vivo remodeling of settable allograft bone/polymer composites. J Biomed Mater Res B Appl Biomater 2015; 103:1641-51. [PMID: 25581686 DOI: 10.1002/jbm.b.33349] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 11/11/2014] [Accepted: 11/18/2014] [Indexed: 11/12/2022]
Abstract
Established clinical approaches to treat bone voids include the implantation of autograft or allograft bone, ceramics, and other bone void fillers (BVFs). Composites prepared from lysine-derived polyurethanes and allograft bone can be injected as a reactive liquid and set to yield BVFs with mechanical strength comparable to trabecular bone. In this study, we investigated the effects of porosity, allograft particle size, and matrix mineralization on remodeling of injectable and settable allograft/polymer composites in a rabbit femoral condyle plug defect model. Both low viscosity and high viscosity grafts incorporating small (<105 μm) particles only partially healed at 12 weeks, and the addition of 10% demineralized bone matrix did not enhance healing. In contrast, composite grafts with large (105-500 μm) allograft particles healed at 12 weeks postimplantation, as evidenced by radial μCT and histomorphometric analysis. This study highlights particle size and surface connectivity as influential parameters regulating the remodeling of composite bone scaffolds.
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Affiliation(s)
- Edna M Prieto
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee.,Center for Bone Biology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Anne D Talley
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee.,Center for Bone Biology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Nicholas R Gould
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee
| | - Katarzyna J Zienkiewicz
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee
| | | | | | - Scott A Guelcher
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee.,Center for Bone Biology, Vanderbilt University Medical Center, Nashville, Tennessee.,Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee
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18
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Sariibrahimoglu K, Yang W, Leeuwenburgh SCG, Yang F, Wolke JGC, Zuo Y, Li Y, Jansen JA. Development of porous polyurethane/strontium-substituted hydroxyapatite composites for bone regeneration. J Biomed Mater Res A 2014; 103:1930-9. [DOI: 10.1002/jbm.a.35327] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 08/12/2014] [Accepted: 08/14/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Kemal Sariibrahimoglu
- Department of Biomaterials; Radboud University Medical Center; PO Box 9101 6500 HB Nijmegen The Netherlands
| | - Wanxun Yang
- Department of Biomaterials; Radboud University Medical Center; PO Box 9101 6500 HB Nijmegen The Netherlands
| | - Sander C. G. Leeuwenburgh
- Department of Biomaterials; Radboud University Medical Center; PO Box 9101 6500 HB Nijmegen The Netherlands
| | - Fang Yang
- Department of Biomaterials; Radboud University Medical Center; PO Box 9101 6500 HB Nijmegen The Netherlands
| | - Joop G. C. Wolke
- Department of Biomaterials; Radboud University Medical Center; PO Box 9101 6500 HB Nijmegen The Netherlands
| | - Yi Zuo
- Research Center for Nano-Biomaterials, Analytical and Testing Center; Sichuan University; Chengdu 610064 China
| | - Yubao Li
- Research Center for Nano-Biomaterials, Analytical and Testing Center; Sichuan University; Chengdu 610064 China
| | - John A. Jansen
- Department of Biomaterials; Radboud University Medical Center; PO Box 9101 6500 HB Nijmegen The Netherlands
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19
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Podporska-Carroll J, Ip JW, Gogolewski S. Biodegradable poly(ester urethane) urea scaffolds for tissue engineering: Interaction with osteoblast-like MG-63 cells. Acta Biomater 2014; 10:2781-91. [PMID: 24560622 DOI: 10.1016/j.actbio.2014.02.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Revised: 02/05/2014] [Accepted: 02/10/2014] [Indexed: 10/25/2022]
Abstract
Porous three-dimensional scaffolds with potential for application as cancellous bone graft substitutes were prepared from aliphatic segmented poly(ester urethane) urea using the phase-inverse technique. Proton nuclear magnetic resonance, size-exclusion chromatography, electron spectroscopy for chemical analysis, secondary ion mass spectrometry, infrared spectroscopy, scanning electron microscopy, differential scanning calorimetry, computed tomography and mechanical tests were carried out, to characterize the scaffolds' physicochemical properties. Human osteosarcoma MG-63 cells were seeded into the scaffolds for 1, 2, 3 and 4weeks to evaluate their potential to support attachment, growth and proliferation of osteogenic cells. The scaffold-cell interaction was assessed by analysis of DNA content, total protein amount, alkaline phosphatase activity and WST-1 assay. The scaffolds supported cell attachment, growth and proliferation over the whole culture period of 4weeks (DNA, total protein amount). There was, however, a reduction in the WST-1 assay values at 4weeks, which might suggest a reduction in the rate of cell proliferation at this time.
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20
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Zhu C, Chen Q. Polyhydroxyalkanoate-Based Biomaterials for Applications in Biomedical Engineering. Adv Healthc Mater 2014. [DOI: 10.1002/9781118774205.ch12] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Moglia RS, Robinson JL, Muschenborn AD, Touchet TJ, Maitland DJ, Cosgriff-Hernandez E. Injectable PolyMIPE Scaffolds for Soft Tissue Regeneration. POLYMER 2014; 56:426-434. [PMID: 24563552 PMCID: PMC3927917 DOI: 10.1016/j.polymer.2013.09.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Injury caused by trauma, burns, surgery, or disease often results in soft tissue loss leading to impaired function and permanent disfiguration. Tissue engineering aims to overcome the lack of viable donor tissue by fabricating synthetic scaffolds with the requisite properties and bioactive cues to regenerate these tissues. Biomaterial scaffolds designed to match soft tissue modulus and strength should also retain the elastomeric and fatigue-resistant properties of the tissue. Of particular design importance is the interconnected porous structure of the scaffold needed to support tissue growth by facilitating mass transport. Adequate mass transport is especially true for newly implanted scaffolds that lack vasculature to provide nutrient flux. Common scaffold fabrication strategies often utilize toxic solvents and high temperatures or pressures to achieve the desired porosity. In this study, a polymerized medium internal phase emulsion (polyMIPE) is used to generate an injectable graft that cures to a porous foam at body temperature without toxic solvents. These poly(ester urethane urea) scaffolds possess elastomeric properties with tunable compressive moduli (20-200 kPa) and strengths (4-60 kPa) as well as high recovery after the first conditioning cycle (97-99%). The resultant pore architecture was highly interconnected with large voids (0.5-2 mm) from carbon dioxide generation surrounded by water-templated pores (50-300 μm). The ability to modulate both scaffold pore architecture and mechanical properties by altering emulsion chemistry was demonstrated. Permeability and form factor were experimentally measured to determine the effects of polyMIPE composition on pore interconnectivity. Finally, initial human mesenchymal stem cell (hMSC) cytocompatibility testing supported the use of these candidate scaffolds in regenerative applications. Overall, these injectable polyMIPE foams show strong promise as a biomaterial scaffold for soft tissue repair.
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Affiliation(s)
- Robert S. Moglia
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas, 77843-3120, U.S.A
| | - Jennifer L. Robinson
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas, 77843-3120, U.S.A
| | - Andrea D. Muschenborn
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas, 77843-3120, U.S.A
| | - Tyler J. Touchet
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas, 77843-3120, U.S.A
| | - Duncan J. Maitland
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas, 77843-3120, U.S.A
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22
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Sartori S, Chiono V, Tonda-Turo C, Mattu C, Gianluca C. Biomimetic polyurethanes in nano and regenerative medicine. J Mater Chem B 2014; 2:5128-5144. [DOI: 10.1039/c4tb00525b] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Nature's inspiration is a promising tool to design new biomaterials especially for frontier technological areas such as tissue engineering and nanomedicine.
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Affiliation(s)
- Susanna Sartori
- Politecnico di Torino
- Dep. of Mechanical and Aerospace Engineering
- Turin, Italy
| | - Valeria Chiono
- Politecnico di Torino
- Dep. of Mechanical and Aerospace Engineering
- Turin, Italy
| | - Chiara Tonda-Turo
- Politecnico di Torino
- Dep. of Mechanical and Aerospace Engineering
- Turin, Italy
| | - Clara Mattu
- Politecnico di Torino
- Dep. of Mechanical and Aerospace Engineering
- Turin, Italy
| | - Ciardelli Gianluca
- Politecnico di Torino
- Dep. of Mechanical and Aerospace Engineering
- Turin, Italy
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23
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Dumas JE, Prieto EM, Zienkiewicz KJ, Guda T, Wenke JC, Bible J, Holt GE, Guelcher SA. Balancing the rates of new bone formation and polymer degradation enhances healing of weight-bearing allograft/polyurethane composites in rabbit femoral defects. Tissue Eng Part A 2013; 20:115-29. [PMID: 23941405 DOI: 10.1089/ten.tea.2012.0762] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
There is a compelling clinical need for bone grafts with initial bone-like mechanical properties that actively remodel for repair of weight-bearing bone defects, such as fractures of the tibial plateau and vertebrae. However, there is a paucity of studies investigating remodeling of weight-bearing bone grafts in preclinical models, and consequently there is limited understanding of the mechanisms by which these grafts remodel in vivo. In this study, we investigated the effects of the rates of new bone formation, matrix resorption, and polymer degradation on healing of settable weight-bearing polyurethane/allograft composites in a rabbit femoral condyle defect model. The grafts induced progressive healing in vivo, as evidenced by an increase in new bone formation, as well as a decrease in residual allograft and polymer from 6 to 12 weeks. However, the mismatch between the rates of autocatalytic polymer degradation and zero-order (independent of time) new bone formation resulted in incomplete healing in the interior of the composite. Augmentation of the grafts with recombinant human bone morphogenetic protein-2 not only increased the rate of new bone formation, but also altered the degradation mechanism of the polymer to approximate a zero-order process. The consequent matching of the rates of new bone formation and polymer degradation resulted in more extensive healing at later time points in all regions of the graft. These observations underscore the importance of balancing the rates of new bone formation and degradation to promote healing of settable weight-bearing bone grafts that maintain bone-like strength, while actively remodeling.
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Affiliation(s)
- Jerald E Dumas
- 1 Department of Chemical and Biomolecular Engineering, Vanderbilt University , Nashville, Tennessee
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24
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Synthesis and characterization of novel elastomeric poly(D,L-lactide urethane) maleate composites for bone tissue engineering. Eur Polym J 2013; 49:3337-3349. [PMID: 24817764 DOI: 10.1016/j.eurpolymj.2013.07.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Here, we report the synthesis and characterization of a novel 4-arm poly(lactic acid urethane)-maleate (4PLAUMA) elastomer and its composites with nano-hydroxyapatite (nHA) as potential weight-bearing composite. The 4PLAUMA/nHA ratios of the composites were 1:3, 2:5, 1:2 and 1:1. FTIR and NMR characterization showed urethane and maleate units integrated into the PLA matrix. Energy dispersion and Auger electron spectroscopy confirmed homogeneous distribution of nHA in the polymer matrix. Maximum moduli and strength of the composites of 4PLAUMA/nHA, respectively, are 1973.31 ± 298.53 MPa and 78.10 ± 3.82 MPa for compression, 3630.46 ± 528.32 MPa and 6.23 ± 1.44 MPa for tension, 1810.42 ± 86.10 MPa and 13.00 ± 0.72 for bending, and 282.46 ± 24.91 MPa and 5.20 ± 0.85 MPa for torsion. The maximum tensile strains of the polymer and composites are in the range of 5% to 93%, and their maximum torsional strains vary from 0.26 to 0.90. The composites exhibited very slow degradation rates in aqueous solution, from approximately 50% mass remaining for the pure polymer to 75% mass remaining for composites with high nHA contents, after a period of 8 weeks. Increase in ceramic content increased mechanical properties, but decreased maximum strain, degradation rate, and swelling of the composites. Human bone marrow stem cells and human endothelial cells adhered and proliferated on 4PLAUMA films and degradation products of the composites showed little-to-no toxicity. These results demonstrate that novel 4-arm poly(lactic acid urethane)-maleate (4PLAUMA) elastomer and its nHA composites may have potential applications in regenerative medicine.
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25
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Page JM, Harmata AJ, Guelcher SA. Design and development of reactive injectable and settable polymeric biomaterials. J Biomed Mater Res A 2013; 101:3630-45. [DOI: 10.1002/jbm.a.34665] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Revised: 02/05/2013] [Accepted: 02/14/2013] [Indexed: 12/21/2022]
Affiliation(s)
- Jonathan M. Page
- Department of Chemical and Biomolecular Engineering; Vanderbilt University; Nashville Tennessee
- Center for Bone Biology; Department of Medicine; Vanderbilt University Medical Center; Nashville Tennessee
| | - Andrew J. Harmata
- Department of Chemical and Biomolecular Engineering; Vanderbilt University; Nashville Tennessee
- Center for Bone Biology; Department of Medicine; Vanderbilt University Medical Center; Nashville Tennessee
| | - Scott A. Guelcher
- Department of Chemical and Biomolecular Engineering; Vanderbilt University; Nashville Tennessee
- Center for Bone Biology; Department of Medicine; Vanderbilt University Medical Center; Nashville Tennessee
- Department of Biomedical Engineering; Vanderbilt University; Nashville Tennessee
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26
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27
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Page JM, Prieto EM, Dumas JE, Zienkiewicz KJ, Wenke JC, Brown-Baer P, Guelcher SA. Biocompatibility and chemical reaction kinetics of injectable, settable polyurethane/allograft bone biocomposites. Acta Biomater 2012; 8:4405-16. [PMID: 22871639 DOI: 10.1016/j.actbio.2012.07.037] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2012] [Revised: 07/13/2012] [Accepted: 07/24/2012] [Indexed: 12/11/2022]
Abstract
Injectable and settable bone grafts offer significant advantages over pre-formed implants due to their ability to be administered using minimally invasive techniques and to conform to the shape of the defect. However, injectable biomaterials present biocompatibility challenges due to the potential toxicity and ultimate fate of reactive components that are not incorporated in the final cured product. In this study the effects of stoichiometry and triethylenediamine (TEDA) catalyst concentration on the reactivity, injectability, and biocompatibility of two component lysine-derived polyurethane (PUR) biocomposites were investigated. Rate constants were measured for the reactions of water (a blowing agent resulting in the generation of pores), polyester triol, dipropylene glycol (DPG), and allograft bone particles with the isocyanate-terminated prepolymer using an in situ attenuated total reflection Fourier transform infrared spectroscopy technique. Based on the measured rate constants, a kinetic model predicting the conversion of each component with time was developed. Despite the fact that TEDA is a well-known urethane gelling catalyst, it was found to preferentially catalyze the blowing reaction with water relative to the gelling reactions by a ratio >17:1. Thus the kinetic model predicted that the prepolymer and water proceeded to full conversion, while the conversions of polyester triol and DPG were <70% after 24h, which was consistent with leaching experiments showing that only non-cytotoxic polyester triol and DPG were released from the reactive PUR at early time points. The PUR biocomposite supported cellular infiltration and remodeling in femoral condyle defects in rabbits at 8weeks, and there was no evidence of an adverse inflammatory response induced by unreacted components from the biocomposite or degradation products from the cured polymer. Taken together, these data underscore the utility of the kinetic model in predicting the biocompatibility of reactive biomaterials.
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Affiliation(s)
- Jonathan M Page
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA
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28
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Chen Q, Zhu C, Thouas GA. Progress and challenges in biomaterials used for bone tissue engineering: bioactive glasses and elastomeric composites. Prog Biomater 2012; 1:2. [PMID: 29470743 PMCID: PMC5120665 DOI: 10.1186/2194-0517-1-2] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Accepted: 07/19/2012] [Indexed: 01/17/2023] Open
Abstract
Driven by the increasing economic burden associated with bone injury and disease, biomaterial development for bone repair represents the most active research area in the field of tissue engineering. This article provides an update on recent advances in the development of bioactive biomaterials for bone regeneration. Special attention is paid to the recent developments of sintered Na-containing bioactive glasses, borate-based bioactive glasses, those doped with trace elements (such as Cu, Zn, and Sr), and novel elastomeric composites. Although bioactive glasses are not new to bone tissue engineering, their tunable mechanical properties, biodegradation rates, and ability to support bone and vascular tissue regeneration, as well as osteoblast differentiation from stem and progenitor cells, are superior to other bioceramics. Recent progresses on the development of borate bioactive glasses and trace element-doped bioactive glasses expand the repertoire of bioactive glasses. Although boride and other trace elements have beneficial effects on bone remodeling and/or associated angiogenesis, the risk of toxicity at high levels must be highly regarded in the design of new composition of bioactive biomaterials so that the release of these elements must be satisfactorily lower than their biologically safe levels. Elastomeric composites are superior to the more commonly used thermoplastic-matrix composites, owing to the well-defined elastic properties of elastomers which are ideal for the replacement of collagen, a key elastic protein within the bone tissue. Artificial bone matrix made from elastomeric composites can, therefore, offer both sound mechanical integrity and flexibility in the dynamic environment of injured bone.
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Affiliation(s)
- Qizhi Chen
- Department of Materials Engineering, Monash University, Clayton, Victoria 3800 Australia
| | - Chenghao Zhu
- Department of Materials Engineering, Monash University, Clayton, Victoria 3800 Australia
| | - George A Thouas
- Department of Zoology, The University of Melbourne, Parkville, Victoria 3010 Australia
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29
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Synthesis, characterization and applications of amphiphilic elastomeric polyurethane networks in drug delivery. Polym J 2012. [DOI: 10.1038/pj.2012.131] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Kavlock KD, Whang K, Guelcher SA, Goldstein AS. Degradable segmented polyurethane elastomers for bone tissue engineering: effect of polycaprolactone content. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 24:77-93. [PMID: 22304961 DOI: 10.1163/156856212x624985] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Segmented polyurethanes (PURs), consisting of degradable poly(a-hydroxy ester) soft segments and aminoacid-derived chain extenders, are biocompatible elastomers with tunable mechanical and degradative properties suitable for a variety of tissue-engineering applications. In this study, a family of linear PURs synthesized from poly(ϵ-caprolactone) (PCL) diol, 1,4-diisocyanobutane and tyramine with theoretical PCL contents of 65-80 wt% were processed into porous foam scaffolds and evaluated for their ability to support osteoblastic differentiation in vitro. Differential scanning calorimetry and mechanical testing of the foams indicated increasing polymer crystallinity and compressive modulus with increasing PCL content. Next, bone marrow stromal cells (BMSCs) were seeded into PUR scaffolds, as well as poly(lactic-co-glycolic acid) (PLGA) scaffolds, and maintained under osteogenic conditions for 14 and 21 days. Analysis of cell number indicated a systematic decrease in cell density with increasing PUR stiffness at both 14 and 21 days in culture. However, at these same time points the relative mRNA expression for the bone-specific proteins osteocalcin and the growth factors bone morphogenetic protein-2 and vascular endothelial growth factor gene expression were similar among the PURs. Finally, prostaglandin E2 production, alkaline phosphatase activity and osteopontin mRNA expression were highly elevated on the most-crystalline PUR scaffold as compared to the PLGA and PUR scaffolds. These results suggest that both the modulus and crystallinity of the PUR scaffolds influence cell proliferation and the expression of osteoblastic proteins.
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Affiliation(s)
- Katherine D Kavlock
- School of Biomedical Engineering and Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0211, USA
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Dumas JE, BrownBaer PB, Prieto EM, Guda T, Hale RG, Wenke JC, Guelcher SA. Injectable reactive biocomposites for bone healing in critical-size rabbit calvarial defects. Biomed Mater 2012; 7:024112. [DOI: 10.1088/1748-6041/7/2/024112] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Naveena N, Venugopal J, Rajeswari R, Sundarrajan S, Sridhar R, Shayanti M, Narayanan S, Ramakrishna S. Biomimetic composites and stem cells interaction for bone and cartilage tissue regeneration. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c1jm14401d] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Yoshii T, Dumas JE, Okawa A, Spengler DM, Guelcher SA. Synthesis, characterization of calcium phosphates/polyurethane composites for weight-bearing implants. J Biomed Mater Res B Appl Biomater 2011; 100:32-40. [DOI: 10.1002/jbm.b.31917] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2010] [Revised: 06/13/2011] [Accepted: 06/16/2011] [Indexed: 11/11/2022]
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Dumas JE, Zienkiewicz K, Tanner SA, Prieto EM, Bhattacharyya S, Guelcher SA. Synthesis and Characterization of an Injectable Allograft Bone/Polymer Composite Bone Void Filler with Tunable Mechanical Properties. Tissue Eng Part A 2010; 16:2505-18. [DOI: 10.1089/ten.tea.2009.0672] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Jerald E. Dumas
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee
- Center for Bone Biology, Vanderbilt University, Nashville, Tennessee
| | - Katarzyna Zienkiewicz
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee
- Center for Bone Biology, Vanderbilt University, Nashville, Tennessee
| | - Shaun A. Tanner
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee
- Center for Bone Biology, Vanderbilt University, Nashville, Tennessee
| | - Edna M. Prieto
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee
- Center for Bone Biology, Vanderbilt University, Nashville, Tennessee
| | | | - Scott A. Guelcher
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee
- Center for Bone Biology, Vanderbilt University, Nashville, Tennessee
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