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Ghezzi B, Matera B, Meglioli M, Rossi F, Duraccio D, Faga MG, Zappettini A, Macaluso GM, Lumetti S. Composite PCL Scaffold With 70% β-TCP as Suitable Structure for Bone Replacement. Int Dent J 2024:S0020-6539(24)00067-4. [PMID: 38614878 DOI: 10.1016/j.identj.2024.02.013] [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: 12/10/2023] [Revised: 02/16/2024] [Accepted: 02/19/2024] [Indexed: 04/15/2024] Open
Abstract
OBJECTIVES The purpose of this work was to optimise printable polycaprolactone (PCL)/β-tricalcium phosphate (β-TCP) biomaterials with high percentages of β-TCP endowed with balanced mechanical characteristics to resemble human cancellous bone, presumably improving osteogenesis. METHODS PCL/β-TCP scaffolds were obtained from customised filaments for fused deposition modelling (FDM) 3D printing with increasing amounts of β-TCP. Samples mechanical features, surface topography and wettability were evaluated as well as cytocompatibility assays, cell adhesion and differentiation. RESULTS The parameters of the newly fabricated materila were optimal for PCL/β-TCP scaffold fabrication. Composite surfaces showed higher hydrophilicity compared with the controls, and their surface roughness sharply was higher, possibly due to the presence of β-TCP. The Young's modulus of the composites was significantly higher than that of pristine PCL, indicating that the intrinsic strength of β-TCP is beneficial for enhancing the elastic modulus of the composite biomaterials. All novel composite biomaterials supported greater cellular growth and stronger osteoblastic differentiation compared with the PCL control. CONCLUSIONS This project highlights the possibility to fabricat, through an FDM solvent-free approach, PCL/β-TCP scaffolds of up to 70 % concentrations of β-TCP. overcoming the current lmit of 60 % stated in the literature. The combination of 3D printing and customised biomaterials allowed production of highly personalised scaffolds with optimal mechanical and biological features resembling the natural structure and the composition of bone. This underlines the promise of such structures for innovative approaches for bone and periodontal regeneration.
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Affiliation(s)
- Benedetta Ghezzi
- Centro Universitario di Odontoiatria, Dipartimento di Medicina e Chirurgia, Università di Parma, Parma, Italy; Istituto dei Materiali per l'Elettronica ed il Magnetismo, Consiglio Nazionale delle Ricerche, Parma, Italy
| | - Biagio Matera
- Centro Universitario di Odontoiatria, Dipartimento di Medicina e Chirurgia, Università di Parma, Parma, Italy
| | - Matteo Meglioli
- Centro Universitario di Odontoiatria, Dipartimento di Medicina e Chirurgia, Università di Parma, Parma, Italy.
| | - Francesca Rossi
- Istituto dei Materiali per l'Elettronica ed il Magnetismo, Consiglio Nazionale delle Ricerche, Parma, Italy
| | - Donatella Duraccio
- Istituto di Scienze e Tecnologie per l'Energia e la Mobilità Sostenibili, Consiglio Nazionale delle Ricerche, Torino, Italy
| | - Maria Giulia Faga
- Istituto di Scienze e Tecnologie per l'Energia e la Mobilità Sostenibili, Consiglio Nazionale delle Ricerche, Torino, Italy
| | - Andrea Zappettini
- Istituto dei Materiali per l'Elettronica ed il Magnetismo, Consiglio Nazionale delle Ricerche, Parma, Italy
| | - Guido Maria Macaluso
- Centro Universitario di Odontoiatria, Dipartimento di Medicina e Chirurgia, Università di Parma, Parma, Italy; Istituto dei Materiali per l'Elettronica ed il Magnetismo, Consiglio Nazionale delle Ricerche, Parma, Italy
| | - Simone Lumetti
- Centro Universitario di Odontoiatria, Dipartimento di Medicina e Chirurgia, Università di Parma, Parma, Italy; Istituto dei Materiali per l'Elettronica ed il Magnetismo, Consiglio Nazionale delle Ricerche, Parma, Italy
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Sigusch B, Kranz S, von Hohenberg AC, Wehle S, Guellmar A, Steen D, Berg A, Rabe U, Heyder M, Reise M. Histological and Histomorphometric Evaluation of Implanted Photodynamic Active Biomaterials for Periodontal Bone Regeneration in an Animal Study. Int J Mol Sci 2023; 24:ijms24076200. [PMID: 37047171 PMCID: PMC10094716 DOI: 10.3390/ijms24076200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/17/2023] [Accepted: 03/22/2023] [Indexed: 03/29/2023] Open
Abstract
Recently, our group developed two different polymeric biomaterials with photodynamic antimicrobial surface activity for periodontal bone regeneration. The aim of the present study was to analyze the biocompatibility and osseointegration of these materials in vivo. Two biomaterials based on urethane dimethacrylate (BioM1) and tri-armed oligoester-urethane methacrylate (BioM2) that additionally contained ß-tricalcium phosphate and the photosensitizer mTHPC (meso-tetra(hydroxyphenyl)chlorin) were implanted in non-critical size bone defects in the femur (n = 16) and tibia (n = 8) of eight female domestic sheep. Bone specimens were harvested and histomorphometrically analyzed after 12 months. BioM1 degraded to a lower extent which resulted in a mean remnant square size of 17.4 mm², while 12.2 mm² was estimated for BioM2 (p = 0.007). For BioM1, a total percentage of new formed bone by 30.3% was found which was significant higher compared to BioM2 (8.4%, p < 0.001). Furthermore, BioM1 was afflicted by significant lower soft tissue formation (3.3%) as compared to BioM2 (29.5%). Additionally, a bone-to-biomaterial ratio of 81.9% was detected for BioM1, while 8.5% was recorded for BioM2. Implantation of BioM2 caused accumulation of inflammatory cells and led to fibrous encapsulation. BioM1 (photosensitizer-armed urethane dimethacrylate) showed favorable regenerative characteristics and can be recommended for further studies.
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Affiliation(s)
- Bernd Sigusch
- Department of Conservative Dentistry and Periodontology, University Hospitals Jena, An der alten Post 4, 07743 Jena, Germany (A.C.v.H.)
| | - Stefan Kranz
- Department of Conservative Dentistry and Periodontology, University Hospitals Jena, An der alten Post 4, 07743 Jena, Germany (A.C.v.H.)
- Correspondence:
| | - Andreas Clemm von Hohenberg
- Department of Conservative Dentistry and Periodontology, University Hospitals Jena, An der alten Post 4, 07743 Jena, Germany (A.C.v.H.)
| | - Sabine Wehle
- Department of Conservative Dentistry and Periodontology, University Hospitals Jena, An der alten Post 4, 07743 Jena, Germany (A.C.v.H.)
| | - André Guellmar
- Department of Conservative Dentistry and Periodontology, University Hospitals Jena, An der alten Post 4, 07743 Jena, Germany (A.C.v.H.)
| | | | - Albrecht Berg
- Innovent Technologieentwicklung e.V., 07745 Jena, Germany
| | - Ute Rabe
- Department of Conservative Dentistry and Periodontology, University Hospitals Jena, An der alten Post 4, 07743 Jena, Germany (A.C.v.H.)
| | - Markus Heyder
- Department of Conservative Dentistry and Periodontology, University Hospitals Jena, An der alten Post 4, 07743 Jena, Germany (A.C.v.H.)
| | - Markus Reise
- Department of Conservative Dentistry and Periodontology, University Hospitals Jena, An der alten Post 4, 07743 Jena, Germany (A.C.v.H.)
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Inkjet Printing of Electrodes on Electrospun Micro- and Nanofiber Hydrophobic Membranes for Flexible and Smart Textile Applications. Polymers (Basel) 2022; 14:polym14225043. [PMID: 36433170 PMCID: PMC9697924 DOI: 10.3390/polym14225043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 11/17/2022] [Accepted: 11/18/2022] [Indexed: 11/23/2022] Open
Abstract
With the increasing demand for smart textile and sensor applications, the interest in printed electronics is rising. In this study, we explore the applicability of electrospun membranes, characterized by high porosity and hydrophobicity, as potential substrates for printed electronics. The two most common inks, silver and carbon, were used in inkjet printing to create a conductive paths on electrospun membranes. As substrates, we selected hydrophobic polymers, such as polyimide (PI), low- and high-molecular-weight poly (vinyl butyral-co-vinyl alcohol-co-vinyl acetate) (PVB) and polystyrene (PS). Electrospinning of PI and PVB resulted in nanofibers in the range of 300-500 nm and PVB and PS microfibers (1-5 μm). The printed patterns were investigated with a scanning electron microscope (SEM) and resistance measurements. To verify the biocompatibility of printed electrodes on the membranes, an indirect cytotoxicity test with cells (MG-63) was performed. In this research, we demonstrated good printability of silver and carbon inks on flexible PI, PVB and PS electrospun membranes, leading to electrodes with excellent conductivity. The cytotoxicity study indicated the possibility of using manufactured printed electronics for various sensors and also as topical wearable devices.
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Wang C, Luan W, Zeng Z, He X, Liu Z, Wang JH. Synthesis, solvent interactions and Hansen solubility parameters of polyvinyl butyral. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04366-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Krysiak ZJ, Szewczyk PK, Berniak K, Sroczyk EA, Boratyn E, Stachewicz U. Stretchable skin hydrating PVB patches with controlled pores' size and shape for deliberate evening primrose oil spreading, transport and release. BIOMATERIALS ADVANCES 2022; 136:212786. [PMID: 35929319 DOI: 10.1016/j.bioadv.2022.212786] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 03/29/2022] [Accepted: 03/31/2022] [Indexed: 06/15/2023]
Abstract
With the increasing number of skin problems such as atopic dermatitis and the number of affected people, scientists are looking for alternative treatments to standard ointment or cream applications. Electrospun membranes are known for their high porosity and surface to volume area, which leads to a great loading capacity and their applications as skin patches. Polymer fibers are widely used for biomedical applications such as drug delivery systems or regenerative medicine. Importantly, fibrous meshes are used as oil reservoirs due to their excellent absorption properties. In our study, nano- and microfibers of poly (vinyl butyral-co-vinyl alcohol-co-vinyl acetate) (PVB) were electrospun. The biocompatibility of PVB fibers was confirmed with the keratinocytes culture studies, including cells' proliferation and replication tests. To verify the usability and stretchability of electrospun membranes, they were tested in two forms as-spun and elongated after uniaxially stretched. We examine oil transport through the patches for as-spun fibers and compare it with the numerical simulation of oil flow in the 3D reconstruction of nano- and microfiber networks. Evening primrose oil spreading and water vapor transmission rate (WVTR) tests were performed too. Finally, for skin hydration tests, manufactured materials loaded with evening primrose oil were applied to the forearm of volunteers for 6 h, showing increased skin moisture after using patches. This study clearly demonstrates that pore size and shape, together with fiber diameter, influence oil transport in the electrospun patches allowing to understand the key driving process of electrospun PVB patches for skin hydration applications. The oil release improves skin moisture and can be designed regarding the needs, by manufacturing different fibers' sizes and arrangements. The fibrous based patches loaded with oils are easy to handle and could remain on the altered skin for a long time and deliver the oil, therefore they are an ideal material for overnight bandages for skin treatment.
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Affiliation(s)
- Zuzanna J Krysiak
- Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Cracow, Poland
| | - Piotr K Szewczyk
- Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Cracow, Poland
| | - Krzysztof Berniak
- Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Cracow, Poland
| | - Ewa A Sroczyk
- Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Cracow, Poland
| | | | - Urszula Stachewicz
- Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Cracow, Poland.
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Elemental Selenium Enriched Nanofiber Production. Molecules 2021; 26:molecules26216457. [PMID: 34770865 PMCID: PMC8586966 DOI: 10.3390/molecules26216457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/22/2021] [Accepted: 10/24/2021] [Indexed: 12/02/2022] Open
Abstract
This study aimed to produce electrospun nanofibers from a polyvinyl butyral polymer (PVB) solution enriched with red and grey selenium nanoparticles. Scanning electron microscopic analysis was used to observe the samples, evaluate the fiber diameters, and reveal eventual artifacts in the nanofibrous structure. Average fiber diameter is determined by manually measuring the diameters of randomly selected fibers on scanning electron microscopic (SEM) images. The obtained nanofibers are amorphous with a diameter of approximately 500 nm, a specific surface area of approx. 8 m2 g−1, and 5093 km cm−3 length. If the red and grey selenium nanoparticles were produced in powder form and suspended to the ethanolic solution of PVB then they were located inside and outside the fiber. When selenium nanoparticles were synthesized in the PVB solution, then they were located only inside the fiber. These nanofiber sheets enriched with selenium nanoparticles could be a good candidate for high-efficiency filter materials and medical applications.
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7
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Zhou L, Li QL, Wong HM. A Novel Strategy for Caries Management: Constructing an Antibiofouling and Mineralizing Dual-Bioactive Tooth Surface. ACS APPLIED MATERIALS & INTERFACES 2021; 13:31140-31152. [PMID: 34156831 DOI: 10.1021/acsami.1c06989] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Existing single-functional agents against dental caries are inadequate in antibacterial performance or mineralization balance. This problem can be resolved through a novel strategy, namely, the construction of an antibiofouling and mineralizing dual-bioactive tooth surface by grafting a dentotropic moiety to an antimicrobial peptide. The constructed bioactive peptide can strongly adsorb onto the tooth surface and has beneficial functions in a myriad of ways. It inhibits cariogenic bacteria Streptococcus mutans adhesion, kills planktonic S. mutans, and destroys the S. mutans biofilm on the tooth surface. It also protects teeth from demineralization in acidic environments, and induces self-healing regeneration in the remineralization environment. Molecular dynamics simulations elucidate the main adsorption mechanism that the positively charged amino acid residues in the bioactive peptide bind to phosphate groups on the tooth surface, and the main mineralization mechanism that the negative charges on the outermost layer of the bioactive peptide repel acetic acid ions and attract calcium ions as nucleation sites for remineralization. This study suggests that this in-house synthesized dual-bioactive peptide is a promising functional agent to prevent dental caries, and is effective in inducing in situ self-healing remineralization for the treatment of decayed teeth.
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Affiliation(s)
- Li Zhou
- Paediatric Dentistry and Orthodontics, Faculty of Dentistry, The University of Hong Kong, 34 Hospital Road, Hong Kong SAR 999077, China
| | - Quan Li Li
- Key Lab. of Oral Diseases Research of Anhui Province, College and Hospital of Stomatology, Anhui Medical University, Hefei 230000, China
| | - Hai Ming Wong
- Paediatric Dentistry and Orthodontics, Faculty of Dentistry, The University of Hong Kong, 34 Hospital Road, Hong Kong SAR 999077, China
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Krysiak ZJ, Kaniuk Ł, Metwally S, Szewczyk PK, Sroczyk EA, Peer P, Lisiecka-Graca P, Bailey RJ, Bilotti E, Stachewicz U. Nano- and Microfiber PVB Patches as Natural Oil Carriers for Atopic Skin Treatment. ACS APPLIED BIO MATERIALS 2020; 3:7666-7676. [PMID: 33225238 PMCID: PMC7672701 DOI: 10.1021/acsabm.0c00854] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 08/18/2020] [Indexed: 11/30/2022]
Abstract
![]()
Atopic
dermatitis (eczema) is a widespread disorder, with researchers
constantly looking for more efficacious treatments. Natural oils are
reported to be an effective therapy for dry skin, and medical textiles
can be used as an alternative or supporting therapy. In this study,
fibrous membranes from poly(vinyl butyral-co-vinyl alcohol-co-vinyl
acetate) (PVB) with low and high molecular weights were manufactured
to obtain nano- and micrometer fibers via electrospinning
for the designed patches used as oil carriers for atopic skin treatment.
The biocompatibility of PVB patches was analyzed using proliferation
tests and scanning electron microscopy (SEM), which combined with
a focused ion beam (FIB) allowed for the 3D visualization of patches.
The oil spreading tests with evening primrose, black cumin seed, and
borage were verified with cryo-SEM, which showed the advantage nanofibers
have over microfibers as carriers for low-viscosity oils. The skin
tests expressed the usability and the enhanced oil delivery performance
for electrospun patches. We demonstrate that through the material
nano- and microstructure, commercially available polymers such as
PVB have great potential to be deployed as a biomaterial in medical
applications, such as topical treatments for chronic skin conditions.
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Affiliation(s)
- Zuzanna J Krysiak
- International Center of Electron Microscopy for Material Science, Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Cracow 30-059, Poland
| | - Łukasz Kaniuk
- International Center of Electron Microscopy for Material Science, Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Cracow 30-059, Poland
| | - Sara Metwally
- International Center of Electron Microscopy for Material Science, Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Cracow 30-059, Poland
| | - Piotr K Szewczyk
- International Center of Electron Microscopy for Material Science, Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Cracow 30-059, Poland
| | - Ewa A Sroczyk
- International Center of Electron Microscopy for Material Science, Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Cracow 30-059, Poland
| | - Petra Peer
- Institute of Hydrodynamics of the Czech Academy of Sciences, Prague 16612, Czech Republic
| | - Paulina Lisiecka-Graca
- Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Cracow 30-059, Poland
| | - Russell J Bailey
- School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, U.K
| | - Emiliano Bilotti
- School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, U.K
| | - Urszula Stachewicz
- International Center of Electron Microscopy for Material Science, Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Cracow 30-059, Poland
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Zhao K, Pi B, Zhao L, Tian S, Ge J, Yang H, Sha W, Wang L. Influence of N-acetyl cysteine (NAC) and 2-methylene-1,3-dioxepane (MDO) on the properties of polymethyl methacrylate (PMMA) bone cement. RSC Adv 2019; 9:11833-11841. [PMID: 35517041 PMCID: PMC9063513 DOI: 10.1039/c9ra01638d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 04/08/2019] [Indexed: 11/25/2022] Open
Abstract
The properties of polymethyl methacrylate (PMMA) bone cement make it a popular bone filling material. However, its disadvantages, such as lack of biodegradability and osteogenesis, restrict its clinical application. Studies have indicated the osteogenic properties of N-acetyl cysteine (NAC) and the biodegradability of 2-methylene-1,3-dioxepane/methyl methacrylate-based (MDO/MMA) copolymers. In this study, we developed bioactive PMMA cements through modification with fixed concentrations of NAC and different proportions of MDO. The purpose of this study was to compare the mechanical properties, morphology, NAC release, biocompatibility, degradability and mineralization capability of modified bone cements with those of conventional cement. The specific-modified specimens (NAC-p (5% MDO-co-MMA)) exhibited a lower bending modulus but had little effect on compressive strength. This material was morphologically compact and nonporous, similar to conventional PMMA bone cement. NAC could be released from NAC-p (5% MDO-co-MMA) continuously and appropriately. NAC-p (5% MDO-co-MMA) was biologically safe and showed satisfactory tissue compatibility. Ester was introduced into the polymer, which reinforced the degradation properties of NAC-p (5% MDO-co-MMA). NAC-p (5% MDO-co-MMA) enhanced the mineralization capability of osteoblastic cells. The properties of polymethyl methacrylate (PMMA) bone cement make it a popular bone filling material.![]()
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Affiliation(s)
- Kangquan Zhao
- Department of Orthopedic Surgery, The Affiliated Zhangjiagang Hospital of Soochow University, The First People's Hospital of Zhangjiagang Suzhou 215000 China
| | - Bin Pi
- Department of Orthopedic Surgery, The First Affiliated Hospital of Soochow University Suzhou 215000 China
| | - Liping Zhao
- Department of Orthopedic Surgery, The Affiliated Zhangjiagang Hospital of Soochow University, The First People's Hospital of Zhangjiagang Suzhou 215000 China
| | - Shoujin Tian
- Department of Orthopedic Surgery, The Affiliated Zhangjiagang Hospital of Soochow University, The First People's Hospital of Zhangjiagang Suzhou 215000 China
| | - Jianfei Ge
- Department of Orthopedic Surgery, The Affiliated Zhangjiagang Hospital of Soochow University, The First People's Hospital of Zhangjiagang Suzhou 215000 China
| | - Huilin Yang
- Department of Orthopedic Surgery, The First Affiliated Hospital of Soochow University Suzhou 215000 China
| | - Weiping Sha
- Department of Orthopedic Surgery, The Affiliated Zhangjiagang Hospital of Soochow University, The First People's Hospital of Zhangjiagang Suzhou 215000 China
| | - Liming Wang
- Department of Orthopedic Surgery, The Affiliated Zhangjiagang Hospital of Soochow University, The First People's Hospital of Zhangjiagang Suzhou 215000 China
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Sigusch BW, Dietsch S, Berg A, Voelpel A, Guellmar A, Rabe U, Schnabelrauch M, Steen D, Gitter B, Albrecht V, Watts DC, Kranz S. Antimicrobial photodynamic active biomaterials for periodontal regeneration. Dent Mater 2018; 34:1542-1554. [PMID: 29970234 DOI: 10.1016/j.dental.2018.06.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 06/18/2018] [Accepted: 06/18/2018] [Indexed: 02/09/2023]
Abstract
OBJECTIVE Biomaterials for periodontal regeneration may have insufficient mechanical and antimicrobial properties or are difficult to apply under clinical conditions. The aim of the present study was to develop a polymeric bone grafting material of suitable physical appearance and antimicrobial photodynamic activity. METHODS Two light curable biomaterials based on urethane dimethacrylate (BioM1) and a tri-armed oligoester-urethane methacrylate (BioM2) that additionally contained a mixture of β-tricalcium phosphate microparticles and 20wt% photosensitizer mTHPC (PS) were fabricated and analyzed by their compressive strength, flexural strength and modulus of elasticity. Cytotoxicity was observed by incubating eluates and in direct-contact to MC3T3-E1 cells. Antimicrobial activity was ascertained on Porphyromonas gingivalis and Enterococcus faecalis upon illumination with laser light (652nm, 1×100J/cm2, 2×100J/cm2). RESULTS The compressive strength, flexural strength and elastic modulus were, respectively, 311.73MPa, 22.81MPa and 318.85MPa for BioM1+PS and 742.37MPa, 7.58MPa and 406.23MPa for BioM2+PS. Both materials did not show any cytotoxic behavior. Single laser-illumination (652nm) caused total suppression of P. gingivalis (BioM2+PS), while repeated irradiation reduced E. faecalis by 3.7 (BioM1+PS) and 3.1 (BioM2+PS) log-counts. SIGNIFICANCE Both materials show excellent mechanical and cytocompatible properties. In addition, irradiation with 652nm induced significant bacterial suppression. The manufactured biomaterials might enable a more efficient cure of periodontal bone lesions. Due to the mechanical properties functional stability might be increased. Further, the materials are antimicrobial upon illumination with light that enables a trans-mucosal eradication of residual pathogens.
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Affiliation(s)
- B W Sigusch
- Department of Conservative Dentistry and Periodontology, University Hospitals Jena, An der alten Post 4, 07743 Jena, Germany
| | - S Dietsch
- Department of Conservative Dentistry and Periodontology, University Hospitals Jena, An der alten Post 4, 07743 Jena, Germany
| | - A Berg
- Biomaterials Department, INNOVENT e.V. Pruessingstrasse 27 B, 07745 Jena, Germany
| | - A Voelpel
- Department of Conservative Dentistry and Periodontology, University Hospitals Jena, An der alten Post 4, 07743 Jena, Germany
| | - A Guellmar
- Department of Conservative Dentistry and Periodontology, University Hospitals Jena, An der alten Post 4, 07743 Jena, Germany
| | - U Rabe
- Department of Conservative Dentistry and Periodontology, University Hospitals Jena, An der alten Post 4, 07743 Jena, Germany
| | - M Schnabelrauch
- Biomaterials Department, INNOVENT e.V. Pruessingstrasse 27 B, 07745 Jena, Germany
| | - D Steen
- biolitec research GmbH, Otto-Schott-Str. 15, 07745 Jena, Germany
| | - B Gitter
- biolitec research GmbH, Otto-Schott-Str. 15, 07745 Jena, Germany
| | - V Albrecht
- biolitec research GmbH, Otto-Schott-Str. 15, 07745 Jena, Germany
| | - D C Watts
- University of Manchester, School of Medical Sciences,Oxford Road, M13 9PL Manchester, UK
| | - S Kranz
- Department of Conservative Dentistry and Periodontology, University Hospitals Jena, An der alten Post 4, 07743 Jena, Germany.
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Sigusch BW, Kranz S, Klein S, Völpel A, Harazim S, Sanchez S, Watts DC, Jandt KD, Schmidt OG, Guellmar A. Colonization of Enterococcus faecalis in a new SiO/SiO2-microtube in vitro model system as a function of tubule diameter. Dent Mater 2014; 30:661-8. [DOI: 10.1016/j.dental.2014.03.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Revised: 02/14/2014] [Accepted: 03/06/2014] [Indexed: 11/30/2022]
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12
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Laser-structured bacterial nanocellulose hydrogels support ingrowth and differentiation of chondrocytes and show potential as cartilage implants. Acta Biomater 2014; 10:1341-53. [PMID: 24334147 DOI: 10.1016/j.actbio.2013.12.004] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 11/10/2013] [Accepted: 12/01/2013] [Indexed: 11/22/2022]
Abstract
The small size and heterogeneity of the pores in bacterial nanocellulose (BNC) hydrogels limit the ingrowth of cells and their use as tissue-engineered implant materials. The use of placeholders during BNC biosynthesis or post-processing steps such as (touch-free) laser perforation can overcome this limitation. Since three-dimensionally arranged channels may be required for homogeneous and functional seeding, three-dimensional (3-D) laser perforation of never-dried BNC hydrogels was performed. Never-dried BNC hydrogels were produced in different shapes by: (i) the cultivation of Gluconacetobacter xylinus (DSM 14666; synonym Komagataeibacter xylinus) in nutrient medium; (ii) the removal of bacterial residues/media components (0.1M NaOH; 30 min; 100 °C) and repeated washing (deionized water; pH 5.8); (iii) the unidirectional or 3-D laser perforation and cutting (pulsed CO2 Rofin SC × 10 laser; 220 μm channel diameter); and (iv) the final autoclaving (2M NaOH; 121 °C; 20 min) and washing (pyrogen-free water). In comparison to unmodified BNC, unidirectionally perforated--and particularly 3-D-perforated - BNC allowed ingrowth into and movement of vital bovine/human chondrocytes throughout the BNC nanofiber network. Laser perforation caused limited structural modifications (i.e. fiber or globular aggregates), but no chemical modifications, as indicated by Fourier transform infrared spectroscopy, X-ray photoelectron scattering and viability tests. Pre-cultured human chondrocytes seeding the surface/channels of laser-perforated BNC expressed cartilage-specific matrix products, indicating chondrocyte differentiation. 3-D-perforated BNC showed compressive strength comparable to that of unmodified samples. Unidirectionally or 3-D-perforated BNC shows high biocompatibility and provides short diffusion distances for nutrients and extracellular matrix components. Also, the resulting channels support migration into the BNC, matrix production and phenotypic stabilization of chondrocytes. It may thus be suitable for in vivo application, e.g. as a cartilage replacement material.
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Cheung JW, Rose EE, Paul Santerre J. Perfused culture of gingival fibroblasts in a degradable/polar/hydrophobic/ionic polyurethane (D-PHI) scaffold leads to enhanced proliferation and metabolic activity. Acta Biomater 2013; 9:6867-75. [PMID: 23416579 DOI: 10.1016/j.actbio.2013.02.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 02/01/2013] [Accepted: 02/05/2013] [Indexed: 01/02/2023]
Abstract
Periodontal diseases cause the breakdown of the tooth-supporting gingival tissue. In treatments aimed at gingival tissue regeneration, tissue engineering is preferred over the common treatments such as scaling. Perfused (dynamic) culture has been shown to increase cell growth in tissue-engineered scaffolds. Since gingival tissues are highly vascularized, it was desired to investigate the influence of perfusion on the function of human gingival fibroblasts (HGF) when cultured in a degradable/polar/hydrophobic/ionic polyurethane scaffold during the early culture phase (4weeks) of engineering gingival tissues. It was observed that the growth of HGF was continuous over 28days in dynamic culture (3-fold increase, p<0.05), while it was reduced after 14days in static culture (i.e. no flow condition). Cell metabolic activity, as measured by a WST-1 assay, and total protein production show that HGF were in different metabolic states in the dynamic vs. static cultures. Observations from scanning electron microscopy and type I collagen (Col I) production measured by Western blotting suggest that medium perfusion significantly promoted collagen production in HGF after the first 4weeks of culture (p<0.05). The different proliferative and metabolic states for HGF in the perfused scaffolds suggest a different cell phenotype which may favour tissue regeneration.
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Yang B, Liu R, Huang J, Sun H. Reverse Dissolution as a Route in the Synthesis of Poly(vinyl butyral) with High Butyral Contents. Ind Eng Chem Res 2013. [DOI: 10.1021/ie400559s] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Biao Yang
- School of Materials
Science
and Mechanical Engineering, Beijing Technology and Business University, Beijing 100048, People’s Republic
of China
| | - Rengang Liu
- School of Materials
Science
and Mechanical Engineering, Beijing Technology and Business University, Beijing 100048, People’s Republic
of China
| | - Jijun Huang
- College of Materials
Science
and Opto-electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, People’s
Republic of China
- Materials
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California
94720, United States
| | - Hui Sun
- School of Materials
Science
and Mechanical Engineering, Beijing Technology and Business University, Beijing 100048, People’s Republic
of China
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Bi L, Li DC, Huang ZS, Yuan Z. Effects of sodium hydroxide, sodium hypochlorite, and gaseous hydrogen peroxide on the natural properties of cancellous bone. Artif Organs 2013; 37:629-36. [PMID: 23373516 DOI: 10.1111/aor.12048] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Processed xenegeneic cancellous bone represents an alternative to bone autograft. In order to observe the effects of present prion inactivation treatments on the natural properties of xenogeneic cancellous bones, we treated bovine bone granules with sodium hydroxide (NaOH), sodium hypochlorite (NaOCl), and gaseous hydrogen peroxide (gH2 O2 ) respectively in this study. The microstructure, composition, and mineral content of the granules were evaluated by scanning electron micrograph, energy dispersive X-ray spectroscopy, ash analysis, and micro-computed tomography. The biomechanical property was analyzed by a materials testing machine. The cytocompatibility was evaluated by using a mouse fibroblast cell line (3T3). The microstructure, organic content, and mechanical strength were dramatically altered at the surface of bone in both NaOH- and NaOCl-treated groups, but not in the gH2 O2 -treated group. Compared with the gH2 O2 -treated group, attachment and proliferation of 3T3 were reduced in either NaOH- or NaOCl-treated groups. As the consequence, gH2 O2 treatment may be a useful approach of disinfection for the preparation of natural cancellous bone with well-preserved structural, mechanical, and biological properties.
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Affiliation(s)
- Long Bi
- Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
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