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Choi JW, Han AR, Yang SY. Ion Release and Apatite Formation of Resin Based Pit and Fissure Sealants Containing 45S5 Bioactive Glass. Polymers (Basel) 2024; 16:1855. [PMID: 39000710 PMCID: PMC11243898 DOI: 10.3390/polym16131855] [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: 05/29/2024] [Revised: 06/20/2024] [Accepted: 06/26/2024] [Indexed: 07/17/2024] Open
Abstract
The purpose of this study was to evaluate a resin based pit and fissure sealant containing 45S5 bioactive glass (BAG) by examining its ion release, pH variation, and apatite-forming properties. To prepare the experimental materials, 45S5 BAG, used as a filler, was incorporated into the light curable resin matrix at concentrations of 0 (control), 12.5, 37.5, and 50.0 wt.%. Ion release, pH variation, and apatite formation (Raman spectrometer and scanning electron microscopy-energy-dispersive X-ray spectrometry measurements) were performed. While no ions were released from the control group, the experimental groups containing 45S5 BAG showed an increased release of Ca and P ions with increasing amounts of 45S5 BAG (p < 0.05). The pH of the experimental group remained high and was significantly different from the control group (p < 0.05). Unlike the control group, it was confirmed that the apatite peak was formed in the 50.0 wt.% BAG group for 90 days, and the apatite layer consisting of Ca and P was deposited on the surface. Thus, a resin based pit and fissure sealant containing 45S5 BAG is a promising material for preventing secondary caries by releasing ions and forming apatite.
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Affiliation(s)
- Ji-Won Choi
- Department of Dental Hygiene, Kyungdong University, Wonju-si 26495, Republic of Korea
| | - A Ruem Han
- Department and Research Institute of Dental Biomaterials and Bioengineering, Yonsei University College of Dentistry, Seoul 03722, Republic of Korea
| | - Song-Yi Yang
- Department of Dental Hygiene, Konyang University, Daejeon 35365, Republic of Korea
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2
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De Cet A, D'Andrea L, Gastaldi D, Baino F, Verné E, Örlygsson G, Vena P. Micro-CT imaging and finite element models reveal how sintering temperature affects the microstructure and strength of bioactive glass-derived scaffolds. Sci Rep 2024; 14:969. [PMID: 38200047 PMCID: PMC10781744 DOI: 10.1038/s41598-023-50255-5] [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: 07/08/2023] [Accepted: 12/18/2023] [Indexed: 01/12/2024] Open
Abstract
This study focuses on the finite element simulation and micromechanical characterization of bioactive glass-ceramic scaffolds using Computed micro Tomography ([Formula: see text]CT) imaging. The main purpose of this work is to quantify the effect of sintering temperature on the morphometry and mechanical performance of the scaffolds. In particular, the scaffolds were produced using a novel bioactive glass material (47.5B) through foam replication, applying six different sintering temperatures. Through [Formula: see text]CT imaging, detailed three-dimensional images of the scaffold's internal structure are obtained, enabling the extraction of important geometric features and how these features change with sintering temperature. A finite element model is then developed based on the [Formula: see text]CT images to simulate the fracture process under uniaxial compression loading. The model incorporates scaffold heterogeneity and material properties-also depending on sintering temperature-to capture the mechanical response, including crack initiation, propagation, and failure. Scaffolds sintered at temperatures equal to or higher than 700 [Formula: see text]C exhibit two-scale porosity, with micro and macro pores. Finite element analyses revealed that the dual porosity significantly affects fracture mechanisms, as micro-pores attract cracks and weaken strength. Interestingly, scaffolds sintered at high temperatures, the overall strength of which is higher due to greater intrinsic strength, showed lower normalized strength compared to low-temperature scaffolds. By using a combined strategy of finite element simulation and [Formula: see text]CT-based characterization, bioactive glass-ceramic scaffolds can be optimized for bone tissue engineering applications by learning more about their micromechanical characteristics and fracture response.
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Affiliation(s)
- Anna De Cet
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Laboratory of Biological Structure Mechanics (LaBS)-Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy
| | - Luca D'Andrea
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Laboratory of Biological Structure Mechanics (LaBS)-Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy
| | - Dario Gastaldi
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Laboratory of Biological Structure Mechanics (LaBS)-Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy
| | - Francesco Baino
- Institute of Materials Physics and Engineering, Department of Applied Science and Technology-Politecnico di Torino, 10129, Turin, Italy
| | - Enrica Verné
- Institute of Materials Physics and Engineering, Department of Applied Science and Technology-Politecnico di Torino, 10129, Turin, Italy
| | | | - Pasquale Vena
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Laboratory of Biological Structure Mechanics (LaBS)-Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy.
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3
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Mustapa NB, Ahmad R, Ibrahim WMW, Abdullah MMAB, Wattanasakulpong N, Nemeș O, Sandu AV, Vizureanu P, Sandu IG, Kartikowati CW, Risdanareni P. Effect of Sintering Mechanism towards Crystallization of Geopolymer Ceramic-A Review. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16114103. [PMID: 37297236 DOI: 10.3390/ma16114103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 05/24/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023]
Abstract
Globally, there is an increasing need for ceramic materials that have a variety of applications in the environment, for precision tools, and for the biomedical, electronics, and environmental industries. However, in order to obtain remarkable mechanical qualities, ceramics have to be manufactured at a high temperature of up to 1600 °C over a long heating period. Furthermore, the conventional approach presents issues with agglomeration, irregular grain growth, and furnace pollution. Many researchers have developed an interest in using geopolymer to produce ceramic materials, focusing on improving the performances of geopolymer ceramics. In addition to helping to lower the sintering temperature, it also improves the strength and other properties of the ceramics. Geopolymer is a product of polymerization involving aluminosilicate sources such as fly ash, metakaolin, kaolin, and slag through activation using an alkaline solution. The sources of the raw materials, the ratio of the alkaline solution, the sintering time, the calcining temperature, the mixing time, and the curing time may have significant impacts on the qualities. Therefore, this review aims to study the effects of sintering mechanisms on the crystallization of geopolymer ceramics, concerning the strength achieved. A future research opportunity is also presented in this review.
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Affiliation(s)
- Nur Bahijah Mustapa
- Faculty of Mechanical Engineering & Technology, Universiti Malaysia Perlis (UniMAP), Arau 01000, Malaysia
- Centre of Excellence Geopolymer and Green Technology (CEGeoGTech), Universiti Malaysia Perlis (UniMAP), Kangar 01000, Malaysia
| | - Romisuhani Ahmad
- Faculty of Mechanical Engineering & Technology, Universiti Malaysia Perlis (UniMAP), Arau 01000, Malaysia
- Centre of Excellence Geopolymer and Green Technology (CEGeoGTech), Universiti Malaysia Perlis (UniMAP), Kangar 01000, Malaysia
| | - Wan Mastura Wan Ibrahim
- Faculty of Mechanical Engineering & Technology, Universiti Malaysia Perlis (UniMAP), Arau 01000, Malaysia
- Centre of Excellence Geopolymer and Green Technology (CEGeoGTech), Universiti Malaysia Perlis (UniMAP), Kangar 01000, Malaysia
| | - Mohd Mustafa Al Bakri Abdullah
- Centre of Excellence Geopolymer and Green Technology (CEGeoGTech), Universiti Malaysia Perlis (UniMAP), Kangar 01000, Malaysia
| | - Nuttawit Wattanasakulpong
- School of Engineering and Technology, Walailak University, Thasala, Nakhon Si Thammarat 80160, Thailand
| | - Ovidiu Nemeș
- Department of Environmental Engineering and Sustainable Development Entrepreneurship, Faculty of Materials and Environmental Engineering, Technical University of Cluj-Napoca, B-dul Muncii 103-105, 400641 Cluj-Napoca, Romania
| | - Andrei Victor Sandu
- Faculty of Materials Science and Engineering, Gheorghe Asachi Technical University of Iasi, Blvd. D. Mangeron 71, 700050 Iasi, Romania
- Romanian Inventors Forum, Str. Sf. P. Movila 3, 700089 Iasi, Romania
| | - Petrica Vizureanu
- Faculty of Materials Science and Engineering, Gheorghe Asachi Technical University of Iasi, Blvd. D. Mangeron 71, 700050 Iasi, Romania
- Technical Sciences Academy of Romania, Dacia Blvd 26, 030167 Bucharest, Romania
| | - Ioan Gabriel Sandu
- Faculty of Materials Science and Engineering, Gheorghe Asachi Technical University of Iasi, Blvd. D. Mangeron 71, 700050 Iasi, Romania
| | | | - Puput Risdanareni
- Department of Civil Engineering, Faculty of Engineering, Universitas Negeri Malang, Malang 65145, Indonesia
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Thangavel M, Elsen Selvam R. Review of Physical, Mechanical, and Biological Characteristics of 3D-Printed Bioceramic Scaffolds for Bone Tissue Engineering Applications. ACS Biomater Sci Eng 2022; 8:5060-5093. [PMID: 36415173 DOI: 10.1021/acsbiomaterials.2c00793] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
This review focuses on the advancements in additive manufacturing techniques that are utilized for fabricating bioceramic scaffolds and their characterizations leading to bone tissue regeneration. Bioscaffolds are made by mimicking the human bone structure, material composition, and properties. Calcium phosphate apatite materials are the most commonly used scaffold materials as they closely resemble live bone in their inorganic composition. The functionally graded scaffolds are fabricated by utilizing the right choice of the 3D printing method and material combinations to achieve the requirement of the bioscaffold. To tailor the physical, mechanical, and biological properties of the scaffold, certain materials are reinforced, doped, or coated to incorporate the functionality. The biomechanical loading conditions that involve flexion, torsion, and tension exerted on the implanted scaffold are discussed. The finite element analysis (FEA) technique is used to investigate the mechanical property of the scaffold before fabrication. This helps in reducing the actual number of samples used for testing. The FEA simulated results and the experimental result are compared. This review also highlights some of the challenges associated while processing the scaffold such as shrinkage, mechanical instability, cytotoxicity, and printability. In the end, the new materials that are evolved for tissue engineering applications are compiled and discussed.
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Affiliation(s)
- Mahendran Thangavel
- School of Mechanical Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India
| | - Renold Elsen Selvam
- School of Mechanical Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India
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Mahmoud M, Kraxner J, Elsayed H, Galusek D, Bernardo E. Advanced Dye Sorbents from Combined Stereolithography 3D Printing and Alkali Activation of Pharmaceutical Glass Waste. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6823. [PMID: 36234164 PMCID: PMC9572684 DOI: 10.3390/ma15196823] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 09/17/2022] [Accepted: 09/28/2022] [Indexed: 06/16/2023]
Abstract
Additive manufacturing (AM) technologies enable the fabrication of objects with complex geometries in much simpler ways than conventional shaping methods. With the fabrication of recyclable filters for contaminated waters, the present work aims at exploiting such features as an opportunity to reuse glass from discarded pharmaceutical containers. Masked stereolithography-printed scaffolds were first heat-treated at relatively low temperatures (680 and 730 °C for 1 h) and then functionalized by alkali activation, with the formation of zeolite and sodium carbonate phases, which worked as additional adsorbing centers. As-sintered and activated scaffolds were characterized in terms of the efficiency of filtration and removal of methylene blue, used as a reference dye. The adsorption efficiency of activated printed glass was 81%. The 3D-printed adsorbent can be easily separated from the solution for reuse.
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Affiliation(s)
- Mokhtar Mahmoud
- FunGlass, Alexander Dubček University of Trenčín, 911 50 Trenčín, Slovakia
- Department of Industrial Engineering, University of Padova, 35131 Padova, Italy
- Department of Glass Research, National Research Centre, Cairo 12622, Egypt
| | - Jozef Kraxner
- FunGlass, Alexander Dubček University of Trenčín, 911 50 Trenčín, Slovakia
| | - Hamada Elsayed
- Department of Industrial Engineering, University of Padova, 35131 Padova, Italy
| | - Dušan Galusek
- FunGlass, Alexander Dubček University of Trenčín, 911 50 Trenčín, Slovakia
- Joint Glass Centre of the IIC SAS, TnUAD and FChFT STU, 911 50 Trenčín, Slovakia
| | - Enrico Bernardo
- Department of Industrial Engineering, University of Padova, 35131 Padova, Italy
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Vasilescu C, Paul C, Marc S, Hulka I, Péter F. Development of a Tailored Sol-Gel Immobilized Biocatalyst for Sustainable Synthesis of the Food Aroma Ester n-Amyl Caproate in Continuous Solventless System. Foods 2022; 11:foods11162485. [PMID: 36010484 PMCID: PMC9407315 DOI: 10.3390/foods11162485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/13/2022] [Accepted: 08/15/2022] [Indexed: 11/26/2022] Open
Abstract
This study reports the synthesis of a hybrid sol-gel material, based on organically modified silanes (ORMOSILs) with epoxy functional groups, and its application in the stabilization of lipase type B from Candida antarctica (CalB) through sol-gel entrapment. The key immobilization parameters in the sol-gel entrapment of lipase using epoxysilanes were optimized by the design of numerous experiments, demonstrating that glycidoxypropyl-trimethoxysilane can allow the formation of a matrix with excellent properties in view of the biocatalytic esterifications catalyzed by this lipase, at an enzyme loading of 25 g/mol of silane. The characterization of the immobilized biocatalyst and the correlation of its catalytic efficiency with the morphological and physicochemical properties of the sol-gel matrix was accomplished through scanning electron microscopy (SEM), fluorescence microscopy (FM), as well as thermogravimetric and differential thermal analysis (TGA/DTA). The operational and thermal stability of lipase were increased as a result of immobilization, with the entrapped lipase retaining 99% activity after 10 successive reaction cycles in the batch solventless synthesis of n-amyl caproate. A possible correlation of optimal productivity and yield was attempted for this immobilized lipase via the continuous flow synthesis of n-amyl caproate in a solventless system. The robustness and excellent biocatalytic efficiency of the optimized biocatalyst provide a promising solution for the synthesis of food-grade flavor esters, even at larger scales.
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Affiliation(s)
- Corina Vasilescu
- Biocatalysis Group, Department of Applied Chemistry and Engineering of Organic and Natural Compounds, Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University Timisoara, Carol Telbisz 6, 300001 Timisoara, Romania
| | - Cristina Paul
- Biocatalysis Group, Department of Applied Chemistry and Engineering of Organic and Natural Compounds, Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University Timisoara, Carol Telbisz 6, 300001 Timisoara, Romania
- Correspondence:
| | - Simona Marc
- Biocatalysis Group, Department of Applied Chemistry and Engineering of Organic and Natural Compounds, Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University Timisoara, Carol Telbisz 6, 300001 Timisoara, Romania
- Faculty of Veterinary Medicine, Banat’s University of Agricultural Sciences and Veterinary Medicine ‘The King Michael I of Romania’, Calea Aradului 119, 300645 Timisoara, Romania
| | - Iosif Hulka
- Research Institute for Renewable Energy, Politehnica University Timisoara, Gavril Musicescu 138, 300501 Timisoara, Romania
| | - Francisc Péter
- Biocatalysis Group, Department of Applied Chemistry and Engineering of Organic and Natural Compounds, Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University Timisoara, Carol Telbisz 6, 300001 Timisoara, Romania
- Research Institute for Renewable Energy, Politehnica University Timisoara, Gavril Musicescu 138, 300501 Timisoara, Romania
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7
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Sintering Behavior of a Six-Oxide Silicate Bioactive Glass for Scaffold Manufacturing. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10228279] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The intrinsic brittleness of bioactive glasses (BGs) is one of the main barriers to the widespread use of three-dimensional porous BG-derived bone grafts (scaffolds) in clinical practice. Among all the available strategies for improving the mechanical properties of BG-based scaffolds, strut densification upon sintering treatments at high temperatures represents a relatively easy approach, but its implementation might lead to undesired and poorly predictable decrease in porosity, mass transport properties and bioactivity resulting from densification and devitrification phenomena occurring in the material upon heating. The aim of the present work was to investigate the sinter-crystallization of a highly bioactive SiO2-P2O5-CaO–MgO–Na2O–K2O glass (47.5B composition) in reference to its suitability for the fabrication of bonelike foams. The thermal behavior of 47.5B glass particles was investigated upon sintering at different temperatures in the range of 600–850 °C by means of combined thermal analyses (differential thermal analysis (DTA) and hot-stage microscopy (HSM)). Then, XRD measurements were carried out to identify crystalline phases developed upon sintering. Finally, porous scaffolds were produced by a foam replica method in order to evaluate the effect of the sintering temperature on the mechanical properties under compression loading conditions. Assessing a relationship between mechanical properties and sintering temperature, or in other words between scaffold performance and fabrication process, is a key step towards the rationale design of optimized scaffolds for tissue repair.
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8
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Mubina MK, Shailajha S, Sankaranarayanan R, Saranya L. In vitro bioactivity, mechanical behavior and antibacterial properties of mesoporous SiO2-CaO-Na2O-P2O5 nano bioactive glass ceramics. J Mech Behav Biomed Mater 2019; 100:103379. [DOI: 10.1016/j.jmbbm.2019.103379] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 07/26/2019] [Accepted: 08/01/2019] [Indexed: 12/27/2022]
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9
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Chitra S, Bargavi P, Balakumar S. Effect of microwave and probe sonication processes on sol–gel‐derived bioactive glass and its structural and biocompatible investigations. J Biomed Mater Res B Appl Biomater 2019; 108:143-155. [DOI: 10.1002/jbm.b.34373] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 03/04/2019] [Accepted: 03/11/2019] [Indexed: 11/06/2022]
Affiliation(s)
- S. Chitra
- National Centre for Nanoscience and NanotechnologyUniversity of Madras Chennai 600025 Tamil Nadu India
| | - P. Bargavi
- National Centre for Nanoscience and NanotechnologyUniversity of Madras Chennai 600025 Tamil Nadu India
| | - S. Balakumar
- National Centre for Nanoscience and NanotechnologyUniversity of Madras Chennai 600025 Tamil Nadu India
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10
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Rau JV, Curcio M, Raucci MG, Barbaro K, Fasolino I, Teghil R, Ambrosio L, De Bonis A, Boccaccini AR. Cu-Releasing Bioactive Glass Coatings and Their in Vitro Properties. ACS APPLIED MATERIALS & INTERFACES 2019; 11:5812-5820. [PMID: 30653295 DOI: 10.1021/acsami.8b19082] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Bioactive glasses are well-known materials suitable for bone-related applications thanks to their biocompatibility and osteoconductivity. In order to improve their in vivo performance, the modification of the glass composition by adding ions with specific biological functions is required. As copper (Cu) possesses antibacterial properties, in this study, 5 wt % of CuO has been added to the 45S5 bioactive glass composition. The investigation of the effect of the Cu-containing bioactive glass on cellular behavior has revealed that the presence of Cu induces an early differentiation of human mesenchymal stem cells through osteoblast phenotype, promotes the expression of anti-inflammatory interleukin, and reduces proinflammatory interleukin expression. With the aim to produce coatings with antibacterial properties, the Cu-containing bioactive glass was used as the target material for the pulsed laser deposition (PLD) of bioactive thin films. PLD experiments were carried out at different substrate temperatures to study the effect on the film's characteristics. All of the films are compact, crack-free, and characterized by a rough morphology and good wettability. The in vitro bioactivity was demonstrated by the apatite growth on the coating surface, after soaking in simulated body fluid, revealed by Raman spectroscopy and scanning electron microscopy-energy dispersive X-ray analyses. The antibacterial study proved that the material showed more effective activity against three Gram-negative bacteria ( Pseudomonas aeruginosa, Escherichia coli, Salmonella enterica) rather than against Gram-positive bacteria ( Staphylococcus aureus).
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Affiliation(s)
- Julietta V Rau
- Istituto di Struttura della Materia , Consiglio Nazionale delle Ricerche (ISM-CNR) , Via del Fosso del Cavaliere , 100-00133 Rome , Italy
| | - Mariangela Curcio
- Dipartimento di Scienze , Università della Basilicata , Via dell'Ateneo Lucano , 10-85100 Potenza , Italy
| | - Maria Grazia Raucci
- Institute of Polymers, Composites and Biomaterials , National Research Council of Italy (IPCB-CNR) , Mostra d'Oltremare Pad. 20-Viale J.F. Kennedy , 54-80125 Naples , Italy
| | - Katia Barbaro
- Istituto Zooprofilattico Sperimentale Lazio e Toscana "M. Aleandri" , Via Appia Nuova , 1411-00178 Rome , Italy
| | - Ines Fasolino
- Institute of Polymers, Composites and Biomaterials , National Research Council of Italy (IPCB-CNR) , Mostra d'Oltremare Pad. 20-Viale J.F. Kennedy , 54-80125 Naples , Italy
| | - Roberto Teghil
- Dipartimento di Scienze , Università della Basilicata , Via dell'Ateneo Lucano , 10-85100 Potenza , Italy
| | - Luigi Ambrosio
- Institute of Polymers, Composites and Biomaterials , National Research Council of Italy (IPCB-CNR) , Mostra d'Oltremare Pad. 20-Viale J.F. Kennedy , 54-80125 Naples , Italy
| | - Angela De Bonis
- Dipartimento di Scienze , Università della Basilicata , Via dell'Ateneo Lucano , 10-85100 Potenza , Italy
| | - Aldo R Boccaccini
- Institute of Biomaterials, Department of Materials Science and Engineering , University of Erlangen-Nuremberg , Cauerstr. 6 , 91058 Erlangen , Germany
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11
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Soliman IES, Metawa AES, Aboelnasr MAH, Eraba KT. Surface treatment of sol-gel bioglass using dielectric barrier discharge plasma to enhance growth of hydroxyapatite. KOREAN J CHEM ENG 2018. [DOI: 10.1007/s11814-018-0131-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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12
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Fiume E, Barberi J, Verné E, Baino F. Bioactive Glasses: From Parent 45S5 Composition to Scaffold-Assisted Tissue-Healing Therapies. J Funct Biomater 2018; 9:E24. [PMID: 29547544 PMCID: PMC5872110 DOI: 10.3390/jfb9010024] [Citation(s) in RCA: 119] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 03/12/2018] [Accepted: 03/13/2018] [Indexed: 12/16/2022] Open
Abstract
Nowadays, bioactive glasses (BGs) are mainly used to improve and support the healing process of osseous defects deriving from traumatic events, tumor removal, congenital pathologies, implant revisions, or infections. In the past, several approaches have been proposed in the replacement of extensive bone defects, each one with its own advantages and drawbacks. As a result, the need for synthetic bone grafts is still a remarkable clinical challenge since more than 1 million bone-graft surgical operations are annually performed worldwide. Moreover, recent studies show the effectiveness of BGs in the regeneration of soft tissues, too. Often, surgical criteria do not match the engineering ones and, thus, a compromise is required for getting closer to an ideal outcome in terms of good regeneration, mechanical support, and biocompatibility in contact with living tissues. The aim of the present review is providing a general overview of BGs, with particular reference to their use in clinics over the last decades and the latest synthesis/processing methods. Recent advances in the use of BGs in tissue engineering are outlined, where the use of porous scaffolds is gaining growing importance thanks to the new possibilities given by technological progress extended to both manufacturing processes and functionalization techniques.
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Affiliation(s)
- Elisa Fiume
- Institute of Materials Physics and Engineering, Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.
| | - Jacopo Barberi
- Institute of Materials Physics and Engineering, Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.
| | - Enrica Verné
- Institute of Materials Physics and Engineering, Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.
| | - Francesco Baino
- Institute of Materials Physics and Engineering, Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.
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13
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Erasmus EP, Sule R, Johnson OT, Massera J, Sigalas I. In vitro Evaluation of Porous borosilicate, borophosphate and phosphate Bioactive Glasses Scaffolds fabricated using Foaming Agent for Bone Regeneration. Sci Rep 2018; 8:3699. [PMID: 29487328 PMCID: PMC5829084 DOI: 10.1038/s41598-018-22032-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 02/15/2018] [Indexed: 11/09/2022] Open
Abstract
In this work, glasses within the borosilicate borophosphate and phosphate family were sintered into 3D porous scaffolds using 60 and 70 vol. % NH4(HCO3) as a foaming agent. All scaffolds produced remained amorphous; apart from one third of the glasses which crystallized. All produced scaffolds had porosity >50% and interconnected pores in the range of 250-570 µm; as evidenced by µCT. The in-vitro dissolution of the scaffolds in SBF and changes in compression were assessed as a function of immersion time. The pH of the solution containing the borosilicate scaffolds increased due to the typical non-congruent dissolution of this glass family. Borophosphate and phosphate scaffolds induced a decrease in pH upon dissolution attributed to the congruent dissolution of those materials and the large release of phosphate within the media. As prepared, scaffolds showed compressive strength of 1.29 ± 0.21, 1.56 ± 0.63, 3.63 ± 0.69 MPa for the borosilicate, borophosphate and phosphate samples sintered with 60 vol. % NH4 (HCO3), respectively. Evidence of hydroxyapatite precipitation on the borosilicate glass scaffolds was shown by SEM/EDS, XRD and ICP-OES analysis. The borophosphate scaffolds remained stable upon dissolution. The phosphate scaffolds were fully crystallized, leading to very large release of phosphate in the media.
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Affiliation(s)
- E P Erasmus
- African Material Science and Engineering Network (A Carnegie-IAS RISE Network), Johannesburg, South Africa. .,University of the Witwatersrand School of Chemical and Metallurgical Engineering, Johannesburg, South Africa. .,DST/NRF Centre of Excellence in Strong Materials, University of the Witwatersrand, Johannesburg, South Africa.
| | - R Sule
- University of the Witwatersrand School of Chemical and Metallurgical Engineering, Johannesburg, South Africa.,DST/NRF Centre of Excellence in Strong Materials, University of the Witwatersrand, Johannesburg, South Africa
| | - O T Johnson
- African Material Science and Engineering Network (A Carnegie-IAS RISE Network), Johannesburg, South Africa. .,University of Namibia Department of Mining and Metallurgical Engineering, Ongwediva, Namibia.
| | - J Massera
- Tampere University of Technology BioMediTech institute and Faculty of Biomedical Sciences and Engineering, Tampere, Finland
| | - I Sigalas
- African Material Science and Engineering Network (A Carnegie-IAS RISE Network), Johannesburg, South Africa.,University of the Witwatersrand School of Chemical and Metallurgical Engineering, Johannesburg, South Africa.,DST/NRF Centre of Excellence in Strong Materials, University of the Witwatersrand, Johannesburg, South Africa
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