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Kamrani A, Nasrabadi MH, Halabian R, Ghorbani M. A biomimetic multi-layer scaffold with collagen and zinc doped bioglass as a skin-regeneration agent in full-thickness injuries and its effects in vitro and in vivo. Int J Biol Macromol 2023; 253:127163. [PMID: 37778589 DOI: 10.1016/j.ijbiomac.2023.127163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 09/27/2023] [Accepted: 09/28/2023] [Indexed: 10/03/2023]
Abstract
Due to the multilayer structure of skin tissue, the fabrication of a 3-layer scaffold could result in planned dermal regeneration. Herein, polyurethane (PU) and polycaprolactone (PCL), as a function of their mechanical stability and collagen due to its arginine-glycine-aspartic acid sequences, zinc ions because of overcoming the common problems of biological factors were employed. The scaffolds' physical, mechanical, and biological properties were examined by SEM, FTIR, contact angle, mechanical tensile, bacteriocidal efficacy, and hemolysis. Also, after L-929 fibroblast seeding, their biological activity was determined by SEM, DAPI, and MTT assays. Then, the cell-seeded scaffolds were implanted in full-thickness wounds of rats and evaluated by wound closure, histological, and molecular techniques. The in vivo studies showed better wound closure with the composite scaffold containing zinc ions. While its dermal re-organization was retarded in the presence of zinc ions compared to the composite scaffold containing non-doped bioglass. Despite this, the doped composite scaffold indicated better observations with the histological evaluations than the nontreated and bare scaffold groups. Real-time PCR confirmed the higher expression of FGF2 and FGFR genes in rats treated with the zinc-doped composite scaffold. In conclusion, PU/PCL-collagen/PCL-collagen containing the doped or non-doped nanoparticles showed better potential to heal dermal injuries.
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Affiliation(s)
- Asefeh Kamrani
- Department of Biology, Parand Branch, Islamic Azad University, Tehran, Iran
| | | | - Raheleh Halabian
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Masoud Ghorbani
- Applied Biotechnoiogy Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
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2
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Ramaraju H, Landry AM, Sashidharan S, Shetty A, Crotts SJ, Maher KO, Goudy SL, Hollister SJ. Clinical grade manufacture of 3D printed patient specific biodegradable devices for pediatric airway support. Biomaterials 2022; 289:121702. [PMID: 36041362 DOI: 10.1016/j.biomaterials.2022.121702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 07/10/2022] [Accepted: 07/24/2022] [Indexed: 01/01/2023]
Abstract
Implantable patient-specific devices are the next frontier of personalized medicine, positioned to improve the quality of care across multiple clinical disciplines. Translation of patient-specific devices requires time- and cost-effective processes to design, verify and validate in adherence to FDA guidance for medical device manufacture. In this study, we present a generalized strategy for selective laser sintering (SLS) of patient-specific medical devices following the prescribed guidance for additive manufacturing of medical devices issued by the FDA in 2018. We contextualize this process for manufacturing an Airway Support Device, a life-saving tracheal and bronchial implant restoring airway patency for pediatric patients diagnosed with tracheobronchomalacia and exhibiting partial or complete airway collapse. The process covers image-based modeling, design inputs, design verification, material inputs and verification, device verification, and device validation, including clinical results. We demonstrate how design and material assessment lead to verified Airway Support Devices that achieve desired airway patency and reduction in required Positive End-Expiratory Pressure (PEEP) after patient implantation. We propose this process as a template for general quality control of patient-specific, 3D printed implants.
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Affiliation(s)
- Harsha Ramaraju
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA.
| | - April M Landry
- Department of Otolaryngology-Head and Neck Surgery, Children's Healthcare of Atlanta, Emory University, Atlanta, GA, USA
| | - Subhadra Sashidharan
- Division of Cardiothoracic Surgery, Department of Surgery, Children's Healthcare of Atlanta, Emory University School of Medicine, Atlanta, GA, USA
| | | | - Sarah J Crotts
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Kevin O Maher
- Division of Cardiology, Pediatric Cardiology, Children's Healthcare of Atlanta, Atlanta, GA, 30322, USA; Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA
| | - Steven L Goudy
- Division of Pediatric Otolaryngology, Department of Otolaryngology-Head and Neck Surgery, Children's Healthcare of Atlanta, Emory University, Atlanta, GA, USA
| | - Scott J Hollister
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA.
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Pauly H, Fischenich K, Kelly D, Popat K, Easley J, Palmer RH, Haut Donahue TL. The Effect of Anterior Cruciate Ligament Reconstruction with an Electropsun Scaffold on Tibiofemoral Contact Mechanics. Ann Biomed Eng 2021; 49:3748-3759. [PMID: 34668099 DOI: 10.1007/s10439-021-02874-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 09/29/2021] [Indexed: 11/28/2022]
Abstract
Surgical reconstruction of the torn ACL is performed to restore native contact mechanics. Drawbacks to traditional ACL repair techniques motivate the development of a tissue engineered ACL scaffold. Our group has developed a hierarchical electrospun polycaprolactone (PCL) scaffold that consists of rolled nanofiber bundles attached at each end with solvent-case blocks of PCL. The goal of this study was to compare ovine cadaver tibiofemoral contact mechanics after ACL reconstruction with the electrospun scaffold to a clinically applicable ACL reconstruction with a soft tissue graft and the ACL transected condition (ACLX). In the ACLX group and after ACL reconstruction with either the electrospun scaffold or soft tissue graft, pressure sensors were inserted under the menisci. Loads up to 890 N were applied at various flexion angles. The scaffold performed the best at restoring contact mechanics in the medial hemijoint to that of the native ACL. The scaffold was good at maintaining a medial-lateral balance of pressures as in the native joint whereas the ACLX shifted pressure off the lateral and on to the medial hemijoint. While the ACL scaffold didn't restore mechanics to that of the native condition, it improved contact mechanics compared to the standard graft replacement and ACLX condition.
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Affiliation(s)
- Hannah Pauly
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO, USA
| | - Kristine Fischenich
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO, USA.,Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA
| | - Daniel Kelly
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Ketul Popat
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO, USA.,Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA
| | - Jeremiah Easley
- Clinical Sciences Department, Colorado State University, Fort Collins, CO, USA
| | - Ross H Palmer
- Clinical Sciences Department, Colorado State University, Fort Collins, CO, USA
| | - Tammy L Haut Donahue
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO, USA. .,Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA. .,Department of Biomedical Engineering, University of Memphis, 330 Engineering Technology, Memphis, TN, 38114, USA.
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4
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Peripheral Nerve Regeneration Using a Nerve Conduit with Olfactory Ensheathing Cells in a Rat Model. Tissue Eng Regen Med 2021; 18:453-465. [PMID: 33515167 DOI: 10.1007/s13770-020-00326-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 11/12/2020] [Accepted: 11/23/2020] [Indexed: 10/22/2022] Open
Abstract
BACKGROUND Autologous nerve grafts are the gold standard treatment for peripheral nerve injury treatment. However, this procedure cannot avoid sacrificing other nerves as a major limitation. The aim of the present study was to evaluate the potential of olfactory ensheathing cells (OECs) embedded in a nerve conduit. METHODS A 10-mm segment of the sciatic nerve was resected in 21 rats, and the nerve injury was repaired with one of the following (n = 7 per group): autologous nerve graft, poly (ε-caprolactone) (PCL) conduit and OECs, and PCL conduit only. The consequent effect on nerve regeneration was measured based on the nerve conduction velocity (NCV), amplitude of the compound muscle action potential (ACMAP), wet muscle weight, histomorphometric analysis, and nerve density quantification. RESULTS Histomorphometric analysis revealed nerve regeneration and angiogenesis in all groups. However, there were significant differences (p < 0.05) in the ACMAP nerve regeneration rate of the gastrocnemius and tibialis anterior muscles between the autologous graft (37.9 ± 14.3% and 39.1% ± 20.4%) and PCL only (17.8 ± 8.6% and 13.6 ± 5.8%) groups, and between the PCL only and PCL + OECs (46.3 ± 20.0% and 34.5 ± 14.6%) groups, with no differences between the autologous nerve and PCL + OEC groups (p > 0.05). No significant results in NCV, wet muscle weight, and nerve density quantification were observed among the 3 groups. CONCLUSION A PCL conduit with OECs enhances the regeneration of injured peripheral nerves, offering a good alternative to autologous nerve grafts.
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Wei C, Han B, Zheng D, Zheng Q, Liu S, Li Z. Aluminum Complexes Bearing Bidentate Amido–Phosphine Ligands for Ring-Opening Polymerization of ε-Caprolactone: Steric Effect on Coordination Chemistry and Reactivity. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00502] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Chuanzhi Wei
- Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department; College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, People’s Republic of China
| | - Binghao Han
- Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department; College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, People’s Republic of China
| | - Dejuan Zheng
- Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department; College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, People’s Republic of China
| | - Quande Zheng
- Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department; College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, People’s Republic of China
| | - Shaofeng Liu
- Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department; College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, People’s Republic of China
| | - Zhibo Li
- Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department; College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, People’s Republic of China
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Li Y, Zhao N, Wei C, Sun A, Liu S, Li Z. Binary organocatalytic system for ring-opening polymerization of ε-caprolactone and δ-valerolactone: Synergetic effects for enhanced selectivity. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2018.12.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Radisavljevic A, Stojanovic DB, Perisic S, Djokic V, Radojevic V, Rajilic-Stojanovic M, Uskokovic PS. Cefazolin-loaded polycaprolactone fibers produced via different electrospinning methods: Characterization, drug release and antibacterial effect. Eur J Pharm Sci 2018; 124:26-36. [DOI: 10.1016/j.ejps.2018.08.023] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 07/19/2018] [Accepted: 08/17/2018] [Indexed: 12/16/2022]
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Brennan DA, Conte AA, Kanski G, Turkula S, Hu X, Kleiner MT, Beachley V. Mechanical Considerations for Electrospun Nanofibers in Tendon and Ligament Repair. Adv Healthc Mater 2018; 7:e1701277. [PMID: 29603679 DOI: 10.1002/adhm.201701277] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 01/15/2018] [Indexed: 12/22/2022]
Abstract
Electrospun nanofibers possess unique qualities such as nanodiameter, high surface area to volume ratio, biomimetic architecture, and tunable chemical and electrical properties. Numerous studies have demonstrated the potential of nanofibrous architecture to direct cell morphology, migration, and more complex biological processes such as differentiation and extracellular matrix (ECM) deposition through topographical guidance cues. These advantages have created great interest in electrospun fibers for biomedical applications, including tendon and ligament repair. Electrospun nanofibers, despite their nanoscale size, generally exhibit poor mechanical properties compared to larger conventionally manufactured polymer fiber materials. This invites the question of what role electrospun polymer nanofibers can play in tendon and ligament repair applications that have both biological and mechanical requirements. At first glance, the strength and stiffness of electrospun nanofiber grafts appear to be too low to fill the rigorous loading conditions of these tissues. However, there are a number of strategies to enhance and tune the mechanical properties of electrospun nanofiber grafts. As researchers design the next-generation electrospun tendon and ligament grafts, it is critical to consider numerous physiologically relevant mechanical criteria and to evaluate graft mechanical performance in conditions and loading environments that reflect in vivo conditions and surgical fixation methods.
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Affiliation(s)
- David A. Brennan
- Department of Biomedical Engineering Rowan University 201 Mullica Hill Road, Rowan Hall Glassboro NJ 08028 USA
| | - Adriano A. Conte
- Department of Biomedical Engineering Rowan University 201 Mullica Hill Road, Rowan Hall Glassboro NJ 08028 USA
| | - Gregory Kanski
- Cooper Bone and Joint Institute and Cooper Medical School, Rowan University 3 Cooper Plaza Camden NJ 08103 USA
| | - Stefan Turkula
- Cooper Bone and Joint Institute and Cooper Medical School, Rowan University 3 Cooper Plaza Camden NJ 08103 USA
| | - Xiao Hu
- Department of Biomedical Engineering Rowan University 201 Mullica Hill Road, Rowan Hall Glassboro NJ 08028 USA
- Department of Physics and Astronomy Rowan University 201 Mullica Hill Road, Rowan Hall Glassboro NJ 08028 USA
| | - Matthew T. Kleiner
- Cooper Bone and Joint Institute and Cooper Medical School, Rowan University 3 Cooper Plaza Camden NJ 08103 USA
| | - Vince Beachley
- Department of Biomedical Engineering Rowan University 201 Mullica Hill Road, Rowan Hall Glassboro NJ 08028 USA
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Pauly HM, Sathy BN, Olvera D, McCarthy HO, Kelly DJ, Popat KC, Dunne NJ, Haut Donahue TL. * Hierarchically Structured Electrospun Scaffolds with Chemically Conjugated Growth Factor for Ligament Tissue Engineering. Tissue Eng Part A 2017; 23:823-836. [PMID: 28350237 DOI: 10.1089/ten.tea.2016.0480] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The anterior cruciate ligament (ACL) of the knee is vital for proper joint function and is commonly ruptured during sports injuries or car accidents. Due to a lack of intrinsic healing capacity and drawbacks with allografts and autografts, there is a need for a tissue-engineered ACL replacement. Our group has previously used aligned sheets of electrospun polycaprolactone nanofibers to develop solid cylindrical bundles of longitudinally aligned nanofibers. We have shown that these nanofiber bundles support cell proliferation and elongation and the hierarchical structure and material properties are similar to the native human ACL. It is possible to combine multiple nanofiber bundles to create a scaffold that attempts to mimic the macroscale structure of the ACL. The goal of this work was to develop a hierarchical bioactive scaffold for ligament tissue engineering using connective tissue growth factor (CTGF)-conjugated nanofiber bundles and evaluate the behavior of mesenchymal stem cells (MSCs) on these scaffolds in vitro and in vivo. CTGF was immobilized onto the surface of individual nanofiber bundles or scaffolds consisting of multiple nanofiber bundles. The conjugation efficiency and the release of conjugated CTGF were assessed using X-ray photoelectron spectroscopy, assays, and immunofluorescence staining. Scaffolds were seeded with MSCs and maintained in vitro for 7 days (individual nanofiber bundles), in vitro for 21 days (scaled-up scaffolds of 20 nanofiber bundles), or in vivo for 6 weeks (small scaffolds of 4 nanofiber bundles), and ligament-specific tissue formation was assessed in comparison to non-CTGF-conjugated control scaffolds. Results showed that CTGF conjugation encouraged cell proliferation and ligament-specific tissue formation in vitro and in vivo. The results suggest that hierarchical electrospun nanofiber bundles conjugated with CTGF are a scalable and bioactive scaffold for ACL tissue engineering.
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Affiliation(s)
- Hannah M Pauly
- 1 School of Biomedical Engineering, Colorado State University , Fort Collins, Colorado
| | - Binulal N Sathy
- 2 Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute , Trinity College Dublin, Dublin, Ireland
| | - Dinorath Olvera
- 2 Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute , Trinity College Dublin, Dublin, Ireland
| | - Helen O McCarthy
- 3 School of Pharmacy, Queen's University Belfast , Belfast, United Kingdom
| | - Daniel J Kelly
- 2 Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute , Trinity College Dublin, Dublin, Ireland .,4 Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin , Dublin, Ireland .,5 Department of Anatomy, Royal College of Surgeons in Ireland , Dublin, Ireland .,6 Advanced Materials and Bioengineering Research Centre, Royal College of Surgeons in Ireland and Trinity College Dublin , Dublin, Ireland
| | - Ketul C Popat
- 1 School of Biomedical Engineering, Colorado State University , Fort Collins, Colorado.,7 Department of Mechanical Engineering, Colorado State University , Fort Collins, Colorado
| | - Nicholas J Dunne
- 2 Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute , Trinity College Dublin, Dublin, Ireland .,3 School of Pharmacy, Queen's University Belfast , Belfast, United Kingdom .,8 Centre for Medical Engineering Research, School of Mechanical and Manufacturing Engineering, Dublin City University , Dublin, Ireland
| | - Tammy Lynn Haut Donahue
- 1 School of Biomedical Engineering, Colorado State University , Fort Collins, Colorado.,7 Department of Mechanical Engineering, Colorado State University , Fort Collins, Colorado
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10
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Li H, Zhao N, Ren C, Liu S, Li Z. Synthesis of linear and star poly(ε-caprolactone) with controlled and high molecular weights via cyclic trimeric phosphazene base catalyzed ring-opening polymerization. Polym Chem 2017. [DOI: 10.1039/c7py01673e] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Linear and star PCLs with controlled and high molecular weights are efficiently prepared by a catalytic system of CTPB/alcohol.
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Affiliation(s)
- Huaike Li
- Key Laboratory of Biobased Polymer Materials
- Shandong Provincial Education Department; School of Polymer Science and Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
- China
| | - Na Zhao
- Key Laboratory of Biobased Polymer Materials
- Shandong Provincial Education Department; School of Polymer Science and Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
- China
| | - Chuanli Ren
- Key Laboratory of Biobased Polymer Materials
- Shandong Provincial Education Department; School of Polymer Science and Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
- China
| | - Shaofeng Liu
- Key Laboratory of Biobased Polymer Materials
- Shandong Provincial Education Department; School of Polymer Science and Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
- China
| | - Zhibo Li
- Key Laboratory of Biobased Polymer Materials
- Shandong Provincial Education Department; School of Polymer Science and Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
- China
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11
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Concurrent collection and post-drawing of individual electrospun polymer nanofibers to enhance macromolecular alignment and mechanical properties. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.09.061] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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12
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Abstract
Rotator cuff tears continue to be at significant risk for re-tear or for failure to heal after surgical repair despite the use of a variety of surgical techniques and augmentation devices. Therefore, there is a need for functionalized scaffold strategies to provide sustained mechanical augmentation during the critical first 12-weeks following repair, and to enhance the healing potential of the repaired tendon and tendon-bone interface. Tissue engineered approaches that combine the use of scaffolds, cells, and bioactive molecules towards promising new solutions for rotator cuff repair are reviewed. The ideal scaffold should have adequate initial mechanical properties, be slowly degrading or non-degradable, have non-toxic degradation products, enhance cell growth, infiltration and differentiation, promote regeneration of the tendon-bone interface, be biocompatible and have excellent suture retention and handling properties. Scaffolds that closely match the inhomogeneity and non-linearity of the native rotator cuff may significantly advance the field. While substantial pre-clinical work remains to be done, continued progress in overcoming current tissue engineering challenges should allow for successful clinical translation.
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