1
|
Baumgartner H, Schüll D, Kolbenschlag J, Mederake M. [Reconstruction of posttraumatic deformities and defects]. ORTHOPADIE (HEIDELBERG, GERMANY) 2023; 52:738-745. [PMID: 37606652 DOI: 10.1007/s00132-023-04422-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/10/2023] [Indexed: 08/23/2023]
Abstract
The reconstruction of posttraumatic defects of bone and soft tissue, as well as residual deformities of the bone is often a lengthy and complicated procedure. Multiple surgical interventions are necessary to reconstruct the affected extremity and restore its functionality. To achieve an optimal result it often takes months or years and requires great patience and compliance of the patient. This treatment should be carried out in centers with the appropriate instrumental and human resources. Since the pathologies are often complex with bony deformities or loss of bone, as well as infections and soft tissue defects, the treatment should be carried out by very experienced surgeons to successfully manage these complex reconstructions. This often requires interdisciplinary cooperation, especially with experienced plastic surgeons. A soft tissue reconstruction for better blood circulation in the exposed bony structures, as well as the bony defects themselves, can be reconstructed at the same time.
Collapse
Affiliation(s)
- Heiko Baumgartner
- BG Unfallklinik Tübingen, Klinik für Unfall- und Wiederherstellungschirurgie, Eberhard-Karls-Universität Tübingen, Tübingen, Deutschland
| | - Daniel Schüll
- BG Unfallklinik Tübingen, Klinik für Unfall- und Wiederherstellungschirurgie, Eberhard-Karls-Universität Tübingen, Tübingen, Deutschland.
- BG Klinik Tübingen, Schnarrenbergstr. 95, 72076, Tübingen, Deutschland.
| | - Jonas Kolbenschlag
- BG Unfallklinik Tübingen, Klinik für Hand‑, Plastische, Rekonstruktive und Verbrennungschirurgie, Eberhard-Karls-Universität Tübingen, Tübingen, Deutschland
| | - Moritz Mederake
- BG Unfallklinik Tübingen, Klinik für Unfall- und Wiederherstellungschirurgie, Eberhard-Karls-Universität Tübingen, Tübingen, Deutschland
| |
Collapse
|
2
|
Moritz N, Liesmäki O, Plyusnin A, Keränen P, Kulkova J. Load-bearing composite fracture-fixation devices with tailored fibre placement for toy-breed dogs. Res Vet Sci 2023; 156:66-80. [PMID: 36791579 DOI: 10.1016/j.rvsc.2023.02.001] [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: 02/21/2022] [Revised: 10/31/2022] [Accepted: 02/06/2023] [Indexed: 02/11/2023]
Abstract
Fibre reinforced composites are attractive materials for hard tissue reconstructions, due to the high strength and low flexural modulus. However, lack of contourability in the operation theatre inhibits their clinical applications. The study presents a novel in situ contourable composite implant system for load-bearing conditions. The implant system consists of a thin bioresorbable shell with several cavities, much like bubble-wrap. The central cavity contains a semi-flexible glass fibre preform prepared using Tailored Fibre Placement method. The preform is either pre-impregnated with a light curable resin, or the resin is injected into the cavity during the surgical procedure, followed by light curing. The semi-flexible glass fibre preforms were also examined as separate devices, "miniplates". Two types of miniplates were scrutinized, a simplified pilot design and a spatially refined, "optimized" design. The optimized miniplates were implemented as biostable and bioresorbable versions. The feasibility of the in situ contourable composite implant system was demonstrated. The potential of Tailored Fibre Placement for the semi-flexible glass fibre preforms and miniplates was confirmed in a series of biomechanical tests. However, structural optimization is required. Antebrachial fractures in toy-breeds of dogs are exemplar veterinary applications of the devices; further applications in veterinary and human patients are foreseen.
Collapse
Affiliation(s)
- Niko Moritz
- Biomedical Engineering Research Group, Biomaterials and Medical Device Research Program, Itäinen Pitkäkatu 4B (PharmaCity), 20520 Turku, Finland; Department of Biomaterials Science and Turku Clinical Biomaterials Centre - TCBC, Institute of Dentistry, University of Turku, Itäinen Pitkäkatu 4B (PharmaCity), 20520 Turku, Finland
| | - Oliver Liesmäki
- Biomedical Engineering Research Group, Biomaterials and Medical Device Research Program, Itäinen Pitkäkatu 4B (PharmaCity), 20520 Turku, Finland; Department of Biomaterials Science and Turku Clinical Biomaterials Centre - TCBC, Institute of Dentistry, University of Turku, Itäinen Pitkäkatu 4B (PharmaCity), 20520 Turku, Finland
| | - Artem Plyusnin
- Biomedical Engineering Research Group, Biomaterials and Medical Device Research Program, Itäinen Pitkäkatu 4B (PharmaCity), 20520 Turku, Finland; Department of Biomaterials Science and Turku Clinical Biomaterials Centre - TCBC, Institute of Dentistry, University of Turku, Itäinen Pitkäkatu 4B (PharmaCity), 20520 Turku, Finland
| | - Pauli Keränen
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland
| | - Julia Kulkova
- Biomedical Engineering Research Group, Biomaterials and Medical Device Research Program, Itäinen Pitkäkatu 4B (PharmaCity), 20520 Turku, Finland; Department of Biomaterials Science and Turku Clinical Biomaterials Centre - TCBC, Institute of Dentistry, University of Turku, Itäinen Pitkäkatu 4B (PharmaCity), 20520 Turku, Finland.
| |
Collapse
|
3
|
The influence of different artificial extracellular matrix implant coatings on the regeneration of a critical size femur defect in rats. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 116:111157. [DOI: 10.1016/j.msec.2020.111157] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 06/02/2020] [Accepted: 06/02/2020] [Indexed: 02/06/2023]
|
4
|
Conrad B, Hayashi C, Yang F. Gelatin-Based Microribbon Hydrogels Guided Mesenchymal Stem Cells to Undergo Endochondral Ossification In Vivo with Bone-Mimicking Mechanical Strength. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2019. [DOI: 10.1007/s40883-019-00138-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
5
|
Neuber C, Schulze S, Förster Y, Hofheinz F, Wodke J, Möller S, Schnabelrauch M, Hintze V, Scharnweber D, Rammelt S, Pietzsch J. Biomaterials in repairing rat femoral defects: In vivo insights from small animal positron emission tomography/computed tomography (PET/CT) studies. Clin Hemorheol Microcirc 2019; 73:177-194. [DOI: 10.3233/ch-199208] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Christin Neuber
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department Radiopharmaceutical and Chemical Biology, Dresden, Germany
| | - Sabine Schulze
- Technische Universität Dresden, University Hospital Carl Gustav Carus, University Center for Orthopaedics and Traumatology, Dresden, Germany
- Technische Universität Dresden, Faculty of Medicine, Centre for Translational Bone, Joint and Soft Tissue Research, Dresden, Germany
| | - Yvonne Förster
- Technische Universität Dresden, University Hospital Carl Gustav Carus, University Center for Orthopaedics and Traumatology, Dresden, Germany
- Technische Universität Dresden, Faculty of Medicine, Centre for Translational Bone, Joint and Soft Tissue Research, Dresden, Germany
| | - Frank Hofheinz
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department Positron Emission Tomography, Dresden, Germany
| | - Johanna Wodke
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department Radiopharmaceutical and Chemical Biology, Dresden, Germany
| | | | | | - Vera Hintze
- Technische Universität Dresden, Max Bergmann Center of Biomaterials, Institute of Materials Science, Dresden, Germany
| | - Dieter Scharnweber
- Technische Universität Dresden, Max Bergmann Center of Biomaterials, Institute of Materials Science, Dresden, Germany
- Center of Regenerative Therapies Dresden (CRTD), Dresden, Germany
| | - Stefan Rammelt
- Technische Universität Dresden, University Hospital Carl Gustav Carus, University Center for Orthopaedics and Traumatology, Dresden, Germany
- Technische Universität Dresden, Faculty of Medicine, Centre for Translational Bone, Joint and Soft Tissue Research, Dresden, Germany
- Center of Regenerative Therapies Dresden (CRTD), Dresden, Germany
| | - Jens Pietzsch
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department Radiopharmaceutical and Chemical Biology, Dresden, Germany
- Technische Universität Dresden, School of Science, Faculty of Chemistry and Food Chemistry, Dresden, Germany
| |
Collapse
|
6
|
Wojak-Ćwik IM, Rumian Ł, Krok-Borkowicz M, Hess R, Bernhardt R, Dobrzyński P, Möller S, Schnabelrauch M, Hintze V, Scharnweber D, Pamuła E. Synergistic effect of bimodal pore distribution and artificial extracellular matrices in polymeric scaffolds on osteogenic differentiation of human mesenchymal stem cells. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 97:12-22. [DOI: 10.1016/j.msec.2018.12.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 10/16/2018] [Accepted: 12/05/2018] [Indexed: 12/16/2022]
|
7
|
Huang B, Wu Z, Ding S, Yuan Y, Liu C. Localization and promotion of recombinant human bone morphogenetic protein-2 bioactivity on extracellular matrix mimetic chondroitin sulfate-functionalized calcium phosphate cement scaffolds. Acta Biomater 2018; 71:184-199. [PMID: 29355717 DOI: 10.1016/j.actbio.2018.01.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 11/28/2017] [Accepted: 01/08/2018] [Indexed: 12/22/2022]
Abstract
Localization of recombinant human bone morphogenetic protein-2 (rhBMP-2) with continuous and effective osteogenic stimulation is still a great challenge in the field of bone regeneration. To achieve this aim, rhBMP-2 was tethered on chondroitin sulfate (CS)-functionalized calcium phosphate cement (CPC) scaffolds through specific noncovalent interactions. CS, one of the core glycosaminoglycans, was covalently conjugated onto CPC scaffolds with the assistance of polydopamine (PDA) and further immobilized rhBMP-2 in a biomimetic form. The CPC-PDA-CS scaffolds not only controlled the release kinetics and presentation state of rhBMP-2 but also effectively increased the expression levels of bone morphogenetic protein receptors (BMPRs) and enhanced the recognitions of the remaining rhBMP-2 to BMPRs. Strikingly, the rhBMP-2-loaded CPC-PDA-CS significantly promoted the cellular surface translocation of BMPRs (especially BMPR-IA). In vivo studies demonstrated that, compared with the rhBMP-2 upon CPC and CPC-PDA, the rhBMP-2 upon CPC-PDA-CS exhibited sustained release and induced high quality and more ectopic bone formation. Collectively, these results suggest that rhBMP-2 can be localized within CS-functionalized CPC scaffolds and exert continuous, long-term, and effective osteogenic stimulation. Thus, this work could provide new avenues in mimicking bone extracellular matrix microenvironment and localizing growth factor activity for enhanced bone regeneration. STATEMENT OF SIGNIFICANCE A bioinspired chondroitin sulfate (CS)-functionalized calcium phosphate cement (CPC) platform was developed to tether recombinant human bone morphogenetic protein-2 (rhBMP-2), which could exhibit continuous, long-term, and effective osteogenic stimulation in bone tissue engineering. Compared with rhBMP-2-loaded CPC, the rhBMP-2-loaded CPC-polydopamine-CS scaffolds induced higher expression of bone morphogenetic protein receptors (BMPRs), greater cellular surface translocation of bone morphogenetic protein receptor-IA, higher binding affinity of BMPRs/rhBMP-2, and thus higher activation of the drosophila gene mothers against decapentaplegic protein-1/5/8 (Smad1/5/8) and extracellular-regulated protein kinases-1/2 (ERK1/2) signaling. This work can provide new guidelines for the design of BMP-2-based bioactive materials for bone regeneration.
Collapse
|
8
|
Collagen/glycosaminoglycan coatings enhance new bone formation in a critical size bone defect — A pilot study in rats. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 71:84-92. [DOI: 10.1016/j.msec.2016.09.071] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 09/01/2016] [Accepted: 09/29/2016] [Indexed: 11/20/2022]
|
9
|
Human Bone Xenografts: from Preclinical Testing for Regenerative Medicine to Modeling of Diseases. ACTA ACUST UNITED AC 2016. [DOI: 10.1007/s40610-016-0044-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
10
|
Roland L, Backhaus S, Grau M, Matena J, Teske M, Beyerbach M, Murua Escobar H, Haferkamp H, Gellrich NC, Nolte I. Evaluation of Functionalized Porous Titanium Implants for Enhancing Angiogenesis in Vitro. MATERIALS 2016; 9:ma9040304. [PMID: 28773427 PMCID: PMC5502997 DOI: 10.3390/ma9040304] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 04/14/2016] [Accepted: 04/18/2016] [Indexed: 02/06/2023]
Abstract
Implant constructs supporting angiogenesis are favorable for treating critically-sized bone defects, as ingrowth of capillaries towards the center of large defects is often insufficient. Consequently, the insufficient nutritional supply of these regions leads to impaired bone healing. Implants with specially designed angiogenic supporting geometry and functionalized with proangiogenic cytokines can enhance angiogenesis. In this study, Vascular Endothelial Growth Factor (VEGF) and High Mobility Group Box 1 (HMGB1) were used for incorporation into poly-ε-caprolactone (PCL)-coated porous titanium implants. Bioactivity of released factors and influence on angiogenesis of functionalized implants were evaluated using a migration assay and angiogenesis assays. Both implants released angiogenic factors, inducing migration of endothelial cells. Also, VEGF-functionalized PCL-coated titanium implants enhanced angiogenesis in vitro. Both factors were rapidly released in high doses from the implant coating during the first 72 h.
Collapse
Affiliation(s)
- Laura Roland
- Small Animal Clinic, University of Veterinary Medicine Hannover, Foundation, Hannover D-30559, Germany.
- Division of Medicine Clinic III, Hematology, Oncology and Palliative Medicine, University of Rostock, Rostock D-18057, Germany.
| | - Samantha Backhaus
- Small Animal Clinic, University of Veterinary Medicine Hannover, Foundation, Hannover D-30559, Germany.
| | - Michael Grau
- Small Animal Clinic, University of Veterinary Medicine Hannover, Foundation, Hannover D-30559, Germany.
- Division of Medicine Clinic III, Hematology, Oncology and Palliative Medicine, University of Rostock, Rostock D-18057, Germany.
| | - Julia Matena
- Small Animal Clinic, University of Veterinary Medicine Hannover, Foundation, Hannover D-30559, Germany.
- Division of Medicine Clinic III, Hematology, Oncology and Palliative Medicine, University of Rostock, Rostock D-18057, Germany.
| | - Michael Teske
- Institute for Biomedical Engineering, Rostock University Medical Center, Rostock D-18119, Germany.
| | - Martin Beyerbach
- Institute for Biometry, Epidemiology and Information Processing, University of Veterinary Medicine Hannover, Foundation, Hannover D-30559, Germany.
| | - Hugo Murua Escobar
- Small Animal Clinic, University of Veterinary Medicine Hannover, Foundation, Hannover D-30559, Germany.
- Division of Medicine Clinic III, Hematology, Oncology and Palliative Medicine, University of Rostock, Rostock D-18057, Germany.
| | - Heinz Haferkamp
- Institut fuer Werkstoffkunde, Leibniz Universitaet Hannover, Garbsen D-30823, Germany.
| | - Nils-Claudius Gellrich
- Clinic for Cranio-Maxillo-Facial Surgery, Hannover Medical School, Hannover D-30625, Germany.
| | - Ingo Nolte
- Small Animal Clinic, University of Veterinary Medicine Hannover, Foundation, Hannover D-30559, Germany.
| |
Collapse
|
11
|
Abstract
OBJECTIVES Long bone fractures that fail to heal or show a delay in healing can lead to increased morbidity. Bone marrow aspirate concentrate (BMAC) containing bone mesenchymal stem cells (BMSCs) has been suggested as an autologous biologic adjunct to aid long bone healing. The purpose of this study was to systematically review the basic science in vivo evidence for the use of BMAC with BMSCs in the treatment of segmental defects in animal long bones. DATA SOURCES The PubMed/MEDLINE and EMBASE databases were screened in July 14-25, 2014. STUDY SELECTION The following search criteria were used: [("bmac" OR "bone marrow aspirate concentrate" OR "bmc" OR "bone marrow concentrate" OR "mesenchymal stem cells") AND ("bone" OR "osteogenesis" OR "fracture healing" OR "nonunion" OR "delayed union")]. DATA EXTRACTION Three authors extracted data and analyzed for trends. Quality of evidence score was given to each study. DATA SYNTHESIS Results are presented as Hedge G standardized effect sizes with 95% confidence intervals. RESULTS The search yielded 35 articles for inclusion. Of studies reporting statistics, 100% showed significant increase in bone formation in the BMAC group on radiograph. Ninety percent reported significant improvement in earlier bone healing on histologic/histomorphometric assessment. Eighty-one percent reported a significant increase in bone area on micro-computed tomography. Seventy-eight percent showed a higher torsional stiffness for the BMAC-treated defects. CONCLUSION In the in vivo studies evaluated, BMAC confer beneficial effects on the healing of segmental defects in animal long bone models when compared with a control. Proof-of-concept has been established for BMAC in the treatment of animal segmental bone defects.
Collapse
|
12
|
Du B, Liu W, Deng Y, Li S, Liu X, Gao Y, Zhou L. Angiogenesis and bone regeneration of porous nano-hydroxyapatite/coralline blocks coated with rhVEGF165 in critical-size alveolar bone defects in vivo. Int J Nanomedicine 2015; 10:2555-65. [PMID: 25848271 PMCID: PMC4386782 DOI: 10.2147/ijn.s78331] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
To improve the regenerative performance of nano-hydroxyapatite/coralline (nHA/coral) block grafting in a canine mandibular critical-size defect model, nHA/coral blocks were coated with recombinant human vascular endothelial growth factor(165) (rhVEGF) via physical adsorption (3 μg rhVEGF165 per nHA/coral block). After the nHA/coral blocks and VEGF/nHA/coral blocks were randomly implanted into the mandibular box-shaped defects in a split-mouth design, the healing process was evaluated by histological observation and histomorphometric and immunohistological analyses. The histological evaluations revealed the ingrowth of newly formed blood vessels and bone at the periphery and cores of the blocks in both groups at both 3 and 8 weeks postsurgery, respectively. In the histomorphometric analysis, the VEGF/nHA/coral group exhibited a larger quantity of new bone formation at 3 and 8 weeks postsurgery. The percentages of newly formed bone within the entire blocks in the VEGF/nHA/coral group were 27.3% ± 8.1% and 39.3% ± 12.8% at 3 weeks and 8 weeks, respectively, and these values were slightly greater than those of the nHA/coral group (21.7% ± 3.0% and 32.6% ± 10.3%, respectively), but the differences were not significant (P>0.05). The immunohistological evaluations revealed that the neovascular density in the VEGF/nHA/coral group (146 ± 32.9 vessel/mm(2)) was much greater than that in the nHA/coral group (105 ± 51.8 vessel/mm(2)) at the 3-week time point (P<0.05), but no significant difference was observed at the 8-week time point (341 ± 86.1 and 269 ± 50.7 vessel/mm(2), respectively, P>0.05). The present study indicated that nHA/coral blocks might be optimal scaffolds for block grafting in critical-size mandibular defects and that additional VEGF coating via physical adsorption can promote angiogenesis in the early stage of bone healing, which suggests that prevascularized nHA/coral blocks have significant potential as a bioactive material for bone regeneration in large-scale alveolar defects.
Collapse
Affiliation(s)
- Bing Du
- Department of Oral Implantology, Guangdong Provincial Stomatological Hospital, Southern Medical University, Guangzhou, People’s Republic of China
- Center of Stomatology, The First People’s Hospital of Foshan, Foshan, Guangdong, People’s Republic of China
| | - Weizhen Liu
- Department of Oral Implantology, Guangdong Provincial Stomatological Hospital, Southern Medical University, Guangzhou, People’s Republic of China
| | - Yue Deng
- Department of Oral Implantology, Guangdong Provincial Stomatological Hospital, Southern Medical University, Guangzhou, People’s Republic of China
- Department of Oral and Maxillofacial Surgery, Qingdao Stomatological Hospital, Qingdao, People’s Republic of China
| | - Shaobing Li
- Department of Oral Implantology, Guangdong Provincial Stomatological Hospital, Southern Medical University, Guangzhou, People’s Republic of China
| | - Xiangning Liu
- Department of Stomatology, The First Affiliated Hospital of Jinan University, Guangzhou, People’s Republic of China
| | - Yan Gao
- Department of Oral Implantology, Guangdong Provincial Stomatological Hospital, Southern Medical University, Guangzhou, People’s Republic of China
| | - Lei Zhou
- Department of Oral Implantology, Guangdong Provincial Stomatological Hospital, Southern Medical University, Guangzhou, People’s Republic of China
| |
Collapse
|
13
|
Kim JH, Linh NTB, Min YK, Lee BT. Surface modification of porous polycaprolactone/biphasic calcium phosphate scaffolds for bone regeneration in rat calvaria defect. J Biomater Appl 2014; 29:624-35. [PMID: 24939961 DOI: 10.1177/0885328214539822] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
In this study, polycaprolactone scaffolds fabricated by a salt-leaching process were loaded with biphasic calcium phosphate successfully to improve the osteoconductivity in bone regeneration. The surface of polycaprolactone/biphasic calcium phosphate scaffolds was aminolyzed by 1,6-hexamethylenediamine to introduce amino groups onto the surface, which was verified qualitatively by ninhyrin staining. Collagen was further immobilized on the aminolyzed porous polycaprolactone via N-ethyl-N'-(3-dimethylaminopropy) carbodiimide hydrochloride/hydroxy-2,5-dioxopyrolidine-3-sulfonic acid sodium cross-linking. The pore size of polycaprolactone/biphasic calcium phosphate-collagen scaffolds was 200-300 µm, which was suitable for bone in-growth. The X-ray photoelectron spectroscopy confirmed the coupling of collagen immobilized on the surface of polycaprolactone/biphasic calcium phosphate. In vitro results demonstrated that the spreading and viability of MC3T3-E1 cells were remarkably improved in the polycaprolactone/biphasic calcium phosphate-collagen scaffolds. The in vivo study was carried out by implanting the porous polycaprolactone, polycaprolactone/biphasic calcium phosphate, and polycaprolactone/biphasic calcium phosphate-collagen to the skulls of rats. Although the addition of biphasic calcium phosphate particles in the polycaprolactone scaffolds does not have a strong effect on the new bone formation, the immobilization of collagen on the polycaprolactone/biphasic calcium phosphate scaffolds significantly improved the bone regeneration even though the implantation time was short, 6 weeks. The present results provide more evidence that functionalizing polycaprolactone with biphasic calcium phosphate and collagen may be a feasible way to improve the osteoconduction in bone regeneration.
Collapse
Affiliation(s)
- Ji-Hyun Kim
- Department of Regenerative Medicine, College of Medicine, Soonchunhyang University, Cheonan, South Korea
| | - Nguyen T B Linh
- Department of Regenerative Medicine, College of Medicine, Soonchunhyang University, Cheonan, South Korea Institute of Tissue Regeneration, Soonchunhyang University, Cheonan, South Korea
| | - Young K Min
- Department of Physiology, College of Medicine, Soonchunhyang University, Cheonan, South Korea
| | - Byong-Taek Lee
- Department of Regenerative Medicine, College of Medicine, Soonchunhyang University, Cheonan, South Korea Institute of Tissue Regeneration, Soonchunhyang University, Cheonan, South Korea
| |
Collapse
|
14
|
ECM inspired coating of embroidered 3D scaffolds enhances calvaria bone regeneration. BIOMED RESEARCH INTERNATIONAL 2014; 2014:217078. [PMID: 25013767 PMCID: PMC4072022 DOI: 10.1155/2014/217078] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 03/27/2014] [Accepted: 04/11/2014] [Indexed: 12/24/2022]
Abstract
Resorbable polymeric implants and surface coatings are an emerging technology to treat bone defects and increase bone formation. This approach is of special interest in anatomical regions like the calvaria since adults lose the capacity to heal large calvarial defects. The present study assesses the potential of extracellular matrix inspired, embroidered polycaprolactone-co-lactide (PCL) scaffolds for the treatment of 13 mm full thickness calvarial bone defects in rabbits. Moreover the influence of a collagen/chondroitin sulfate (coll I/cs) coating of PCL scaffolds was evaluated. Defect areas filled with autologous bone and empty defects served as reference. The healing process was monitored over 6 months by combining a novel ultrasonographic method, radiographic imaging, biomechanical testing, and histology. The PCL coll I/cs treated group reached 68% new bone volume compared to the autologous group (100%) and the biomechanical stability of the defect area was similar to that of the gold standard. Histological investigations revealed a significantly more homogenous bone distribution over the whole defect area in the PCL coll I/cs group compared to the noncoated group. The bioactive, coll I/cs coated, highly porous, 3-dimensional PCL scaffold acted as a guide rail for new skull bone formation along and into the implant.
Collapse
|
15
|
Rentsch B, Bernhardt R, Scharnweber D, Schneiders W, Rammelt S, Rentsch C. Embroidered and surface coated polycaprolactone-co-lactide scaffolds: a potential graft for bone tissue engineering. BIOMATTER 2014; 2:158-65. [PMID: 23507867 PMCID: PMC3549869 DOI: 10.4161/biom.21931] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Tissue engineering and regenerative techniques targeting bone include a broad range of strategies and approaches to repair, augment, replace or regenerate bone tissue. Investigations that are aimed at optimization of these strategies until clinical translation require control of systemic factors as well as modification of a broad range of key parameters.
This article reviews a possible strategy using a tissue engineering approach and systematically describes a series of experiments evaluating the properties of an embroidered and surface coated polycaprolactone-co-lactide scaffold being considered as bone graft substitute for large bone defects. The scaffold design and fabrication, the scaffolds properties, as well as its surface modification and their influence in vitro are evaluated, followed by in vivo analysis of the scaffolds using orthotopic implantation models in small and large animals.
Collapse
|
16
|
Wojak-Cwik IM, Hintze V, Schnabelrauch M, Moeller S, Dobrzynski P, Pamula E, Scharnweber D. Poly(L-lactide-co-glycolide) scaffolds coated with collagen and glycosaminoglycans: impact on proliferation and osteogenic differentiation of human mesenchymal stem cells. J Biomed Mater Res A 2013; 101:3109-22. [PMID: 23526792 DOI: 10.1002/jbm.a.34620] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 01/21/2013] [Accepted: 01/23/2013] [Indexed: 12/27/2022]
Abstract
In this study, we analyzed poly(L-lactide-co-glycolide) (PLGA) scaffolds modified with artificial extracellular matrices (aECM) consisting of collagen type I, chondroitin sulphate, and sulphated hyaluronan (sHya). We investigated the effect of these aECM coatings on proliferation and osteogenic differentiation of human mesenchymal stem cells (hMSC) in vitro. We found that scaffolds were homogeneously coated, and cross-linking of aECM did not significantly influence the amount of collagen immobilized. Cell proliferation was significantly increased on cross-linked surfaces in expansion medium (EM), but was retarded on cross-linked and non-cross-linked collagen/sHya coatings. The alkaline phosphatase activity was increased on sHya-containing coatings in EM even without the presence of differentiation supplements, but was six to ten times higher in differentiation medium (DM) and comparable for cross-linked and non-cross-linked collagen/sHya. The highest amount of calcium phosphate mineral was deposited on day 28 on cross-linked collagen/sHya. Therefore, coatings of PLGA scaffolds with collagen/sHya promoted the osteogenic differentiation of hMSCs in vitro and might be an interesting candidate for the modification of PLGA for bone reconstruction in vivo.
Collapse
Affiliation(s)
- I M Wojak-Cwik
- Department of Biomaterials, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Al. A. Mickiewicza 30, Krakow, Poland; Institute of Material Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, Dresden, Germany
| | | | | | | | | | | | | |
Collapse
|
17
|
Rentsch C, Schneiders W, Hess R, Rentsch B, Bernhardt R, Spekl K, Schneider K, Scharnweber D, Biewener A, Rammelt S. Healing properties of surface-coated polycaprolactone-co-lactide scaffolds: A pilot study in sheep. J Biomater Appl 2013; 28:654-66. [DOI: 10.1177/0885328212471409] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The aim of this pilot study was to evaluate the bioactive, surface-coated polycaprolactone-co-lactide scaffolds as bone implants in a tibia critical size defect model. Polycaprolactone-co-lactide scaffolds were coated with collagen type I and chondroitin sulfate and 30 piled up polycaprolactone-co-lactide scaffolds were implanted into a 3 cm sheep tibia critical size defect for 3 or 12 months ( n = 5 each). Bone healing was estimated by quantification of bone volume in the defects on computer tomography and microcomputer tomography scans, plain radiographs, biomechanical testing as well as by histological evaluations. New bone formation occurred at the proximal and distal ends of the tibia in both groups. The current pilot study revealed a mean new bone formation of 63% and 172% after 3 and 12 months, respectively. The bioactive, surface coated, highly porous three-dimensional polycaprolactone-co-lactide scaffold stack itself acted as a guide rail for new bone formation along and into the implant. These preliminary data are encouraging for future experiments with a larger group of animals.
Collapse
Affiliation(s)
- Claudia Rentsch
- Department of Trauma and Reconstructive Surgery, University Hospital Carl Gustav Carus Dresden, Dresden, Germany
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus Dresden, Dresden, Germany
| | - Wolfgang Schneiders
- Department of Trauma and Reconstructive Surgery, University Hospital Carl Gustav Carus Dresden, Dresden, Germany
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus Dresden, Dresden, Germany
| | - Ricarda Hess
- Max Bergmann Center of Biomaterials, Dresden, Germany
| | | | | | | | - Konrad Schneider
- Department of Mechanic und Structure, Leibniz Institute of Polymer Research Dresden e.V., Dresden, Germany
| | - Dieter Scharnweber
- Max Bergmann Center of Biomaterials, Dresden, Germany
- DFG-Center for Regenerative Therapies Dresden, Dresden, Germany
| | - Achim Biewener
- Department of Trauma and Reconstructive Surgery, University Hospital Carl Gustav Carus Dresden, Dresden, Germany
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus Dresden, Dresden, Germany
| | - Stefan Rammelt
- Department of Trauma and Reconstructive Surgery, University Hospital Carl Gustav Carus Dresden, Dresden, Germany
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus Dresden, Dresden, Germany
- DFG-Center for Regenerative Therapies Dresden, Dresden, Germany
| |
Collapse
|
18
|
Renth AN, Detamore MS. Leveraging "raw materials" as building blocks and bioactive signals in regenerative medicine. TISSUE ENGINEERING. PART B, REVIEWS 2012; 18:341-62. [PMID: 22462759 PMCID: PMC3458620 DOI: 10.1089/ten.teb.2012.0080] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Accepted: 03/28/2012] [Indexed: 01/15/2023]
Abstract
Components found within the extracellular matrix (ECM) have emerged as an essential subset of biomaterials for tissue engineering scaffolds. Collagen, glycosaminoglycans, bioceramics, and ECM-based matrices are the main categories of "raw materials" used in a wide variety of tissue engineering strategies. The advantages of raw materials include their inherent ability to create a microenvironment that contains physical, chemical, and mechanical cues similar to native tissue, which prove unmatched by synthetic biomaterials alone. Moreover, these raw materials provide a head start in the regeneration of tissues by providing building blocks to be bioresorbed and incorporated into the tissue as opposed to being biodegraded into waste products and removed. This article reviews the strategies and applications of employing raw materials as components of tissue engineering constructs. Utilizing raw materials holds the potential to provide both a scaffold and a signal, perhaps even without the addition of exogenous growth factors or cytokines. Raw materials contain endogenous proteins that may also help to improve the translational success of tissue engineering solutions to progress from laboratory bench to clinical therapies. Traditionally, the tissue engineering triad has included cells, signals, and materials. Whether raw materials represent their own new paradigm or are categorized as a bridge between signals and materials, it is clear that they have emerged as a leading strategy in regenerative medicine. The common use of raw materials in commercial products as well as their growing presence in the research community speak to their potential. However, there has heretofore not been a coordinated or organized effort to classify these approaches, and as such we recommend that the use of raw materials be introduced into the collective consciousness of our field as a recognized classification of regenerative medicine strategies.
Collapse
Affiliation(s)
- Amanda N. Renth
- Bioengineering Program, University of Kansas, Lawrence, Kansas
| | - Michael S. Detamore
- Bioengineering Program, University of Kansas, Lawrence, Kansas
- Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, Kansas
| |
Collapse
|
19
|
Hess R, Jaeschke A, Neubert H, Hintze V, Moeller S, Schnabelrauch M, Wiesmann HP, Hart DA, Scharnweber D. Synergistic effect of defined artificial extracellular matrices and pulsed electric fields on osteogenic differentiation of human MSCs. Biomaterials 2012; 33:8975-85. [PMID: 22995709 DOI: 10.1016/j.biomaterials.2012.08.056] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Accepted: 08/23/2012] [Indexed: 12/22/2022]
Abstract
In vivo, bone formation is a complex, tightly regulated process, influenced by multiple biochemical and physical factors. To develop a vital bone tissue engineering construct, all of these individual components have to be considered and integrated to gain an in vivo-like stimulation of target cells. The purpose of the present studies was to investigate the synergistic role of defined biochemical and physical microenvironments with respect to osteogenic differentiation of human mesenchymal stem cells (MSCs). Biochemical microenvironments have been designed using artificial extracellular matrices (aECMs), containing collagen I (coll) and glycosaminoglycans (GAGs) like chondroitin sulfate (CS), or a high-sulfated hyaluronan derivative (sHya), formulated as coatings on three-dimensional poly(caprolactone-co-lactide) (PCL) scaffolds. As part of the physical microenvironment, cells were exposed to pulsed electric fields via transformer-like coupling (TC). Results showed that aECM containing sHya enhanced osteogenic differentiation represented by increases in ALP activity and gene-expression (RT-qPCR) of several bone-related proteins (RUNX-2, ALP, OPN). Electric field stimulation alone did not influence cell proliferation, but osteogenic differentiation was enhanced if osteogenic supplements were provided, showing synergistic effects by the combination of sHya and electric fields. These results will improve the understanding of bone regeneration processes and support the development of effective tissue engineered bone constructs.
Collapse
Affiliation(s)
- Ricarda Hess
- Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, 01069 Dresden, Germany.
| | | | | | | | | | | | | | | | | |
Collapse
|
20
|
|
21
|
Panseri S, Russo A, Giavaresi G, Sartori M, Veronesi F, Fini M, Salter DM, Ortolani A, Strazzari A, Visani A, Dionigi C, Bock N, Sandri M, Tampieri A, Marcacci M. Innovative magnetic scaffolds for orthopedic tissue engineering. J Biomed Mater Res A 2012; 100:2278-86. [PMID: 22499413 DOI: 10.1002/jbm.a.34167] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2011] [Revised: 01/31/2012] [Accepted: 03/07/2012] [Indexed: 11/09/2022]
Abstract
The use of magnetism in tissue engineering is a very promising approach, in fact magnetic scaffolds are able not only to support tissue regeneration, but they can be activated and work like a magnet attracting functionalized magnetic nanoparticles (MNPs) injected close to the scaffold enhancing tissue regeneration. This study aimed to assess the in vivo biocompatibility and osteointegrative properties of novel magnetic scaffolds. Two hydroxyapatite/collagen (70/30 wt %) magnetic scaffolds were magnetized with two different techniques: direct nucleation of biomimetic phase and superparamagnetic nanoparticles (MNPs) on self-assembling collagen fibers (MAG-A) and scaffold impregnation in ferro-fluid solution (MAG-B). Magnetic scaffolds were implanted in rabbit distal femoral epiphysis and tibial mid-diaphysis. Histopathological screening showed no inflammatory reaction due to MNPs. Significantly higher bone healing rate (ΔBHR) results were observed in MAG-A in comparison to MAG-B. Significant differences were also found between experimental times with an increase in ΔBHR from 2 to 4 weeks for both scaffolds in trabecular bone, while only for MAG-B (23%, p < 0.05) in cortical bone. The proposed magnetic scaffolds seem to be promising for magnetic guiding in orthopedic tissue engineering applications and they will be suitable to treat also several pathologies in regenerative medicine area.
Collapse
Affiliation(s)
- S Panseri
- Laboratory of Biomechanics and Technology Innovation, Rizzoli Orthopaedic Institute, Bologna, Italy.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Das A, Botchwey E. Evaluation of angiogenesis and osteogenesis. TISSUE ENGINEERING PART B-REVIEWS 2011; 17:403-14. [PMID: 21902609 DOI: 10.1089/ten.teb.2011.0190] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Bone regeneration has long been a major focus for tissue engineers and the importance of vascularization to the bone regeneration process has been well documented. Over the past decade, technological advances in the areas of stem cell biology, scaffold fabrication, and protein engineering have significantly enhanced our understanding of the interplay between vascularization and bone growth. This review, therefore, describes the commonly used models for investigating the complex interactions between osteoblastic cells and endothelial cells, evaluates the different tools utilized to investigate the relationship between vascularization and bone growth in vivo, and finally, summarizes possible areas of research related to therapeutic development.
Collapse
Affiliation(s)
- Anusuya Das
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia 22908, USA
| | | |
Collapse
|