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Bokobza L. On the Use of Nanoparticles in Dental Implants. MATERIALS (BASEL, SWITZERLAND) 2024; 17:3191. [PMID: 38998274 PMCID: PMC11242106 DOI: 10.3390/ma17133191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 06/16/2024] [Accepted: 06/27/2024] [Indexed: 07/14/2024]
Abstract
Results obtained in physics, chemistry and materials science on nanoparticles have drawn significant interest in the use of nanostructures on dental implants. The main focus concerns nanoscale surface modifications of titanium-based dental implants in order to increase the surface roughness and provide a better bone-implant interfacial area. Surface coatings via the sol-gel process ensure the deposition of a homogeneous layer of nanoparticles or mixtures of nanoparticles on the titanium substrate. Nanotubular structures created on the titanium surface by anodic oxidation yield an interesting nanotopography for drug release. Carbon-based nanomaterials hold great promise in the field of dentistry on account of their outstanding mechanical properties and their structural characteristics. Carbon nanomaterials that include carbon nanotubes, graphene and its derivatives (graphene oxide and graphene quantum dots) can be used as coatings of the implant surface. Their antibacterial properties as well as their ability to be functionalized with adequate chemical groups make them particularly useful for improving biocompatibility and promoting osseointegration. Nevertheless, an evaluation of their possible toxicity is required before being exploited in clinical trials.
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Affiliation(s)
- Liliane Bokobza
- Independent Researcher, 194-196 Boulevard Bineau, 92200 Neuilly-sur-Seine, France
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2
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Ordon K, Szatkowski P, Piekarczyk W, Pamuła E, Pielichowska K. Novel Polyurethane-Based Systems Modified with Starch and Phase Change Materials for Bone Tissue Regeneration. Polymers (Basel) 2023; 15:4414. [PMID: 38006138 PMCID: PMC10674823 DOI: 10.3390/polym15224414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 11/07/2023] [Accepted: 11/10/2023] [Indexed: 11/26/2023] Open
Abstract
Novel polyurethane-based materials have been synthesized by a two-step process using poly(ε-caprolactone) diol (PCL) and 1,3-propanediol/starch (PDO/ST) systems as chain extenders/cross-linkers and 1,6-hexamethylane diisocyante (HDI) as a potential material for bone tissue replacement or bone cements. A poly(ethylene glycol)/starch (PEG/ST) system has been applied as a form-stable phase change material (PCM) to decrease the maximum setting temperature, while hydroxyapatite (HAp) has been used as a bioactive nanofiller. FTIR and SEM-EDX analyses were performed to investigate the structure, surface morphology, and thermal properties of the obtained polyurethanes. FTIR spectroscopy confirmed the chemical structure of the synthesized polyurethanes. SEM-EDX analysis confirmed the incorporation of starch/hydroxyapatite into the polyurethane matrix. Modification with PCMs based on PEG or PEG/starch systems allowed for a decrease in the maximum setting temperature of PUs from 6 to 7.6 °C, depending on the type of PCM used. Thus, the obtained polyurethanes show a good energy storage effect and a good application potential for the synthesis of multifunctional bioactive materials for future use as bone cements.
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Affiliation(s)
| | | | | | | | - Kinga Pielichowska
- Department of Biomaterials and Composites, Faculty of Materials Science and Ceramics, AGH University of Krakow, Al. Mickiewicza 30, 30-059 Krakow, Poland; (K.O.); (P.S.); (W.P.); (E.P.)
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3
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Almutairi HH, Parveen N, Ansari SA. Hydrothermal Synthesis of Multifunctional Bimetallic Ag-CuO Nanohybrids and Their Antimicrobial, Antibiofilm and Antiproliferative Potential. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:4167. [PMID: 36500789 PMCID: PMC9737815 DOI: 10.3390/nano12234167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 11/19/2022] [Accepted: 11/21/2022] [Indexed: 06/17/2023]
Abstract
The rapidly growing global problem of infectious pathogens acquiring resistance to conventional antibiotics is an instigating reason for researchers to continue the search for functional as well as broad-spectrum antimicrobials. Hence, we aimed in this study to synthesis silver-copper oxide (Ag-CuO) nanohybrids as a function of Ag concentration (0.05, 0.1, 0.3 and 0.5 g) via the one-step hydrothermal method. The bimetallic Ag-CuO nanohybrids Ag-C-1, Ag-C-2, Ag-C-3 and Ag-C-4 were characterized for their physico-chemical properties. The SEM results showed pleomorphic Ag-CuO crystals; however, the majority of the particles were found in spherical shape. TEM results showed that the Ag-CuO nanohybrids in formulations Ag-C-1 and Ag-C-3 were in the size range of 20-35 nm. Strong signals of Ag, Cu and O in the EDX spectra revealed that the as-synthesized nanostructures are bimetallic Ag-CuO nanohybrids. The obtained Ag-C-1, Ag-C-2, Ag-C-3 and Ag-C-4 nanohybrids have shown their MICs and MBCs against E. coli and C. albicans in the range of 4-12 mg/mL and 2-24 mg/mL, respectively. Furthermore, dose-dependent toxicity and apoptosis process stimulation in the cultured human colon cancer HCT-116 cells have proven the Ag-CuO nanohybrids as promising antiproliferative agents against mammalian cancer.
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Affiliation(s)
- Hayfa Habes Almutairi
- Department of Chemistry, College of Science, King Faisal University, Al Ahsa, P.O. Box 380, Hofuf 31982, Saudi Arabia
| | - Nazish Parveen
- Department of Chemistry, College of Science, King Faisal University, Al Ahsa, P.O. Box 380, Hofuf 31982, Saudi Arabia
| | - Sajid Ali Ansari
- Department of Physics, College of Science, King Faisal University, Al Ahsa, P.O. Box 400, Hofuf 31982, Saudi Arabia
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Ehlert M, Radtke A, Bartmański M, Piszczek P. Evaluation of the Cathodic Electrodeposition Effectiveness of the Hydroxyapatite Layer Used in Surface Modification of Ti6Al4V-Based Biomaterials. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6925. [PMID: 36234265 PMCID: PMC9572782 DOI: 10.3390/ma15196925] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 09/23/2022] [Accepted: 10/01/2022] [Indexed: 06/16/2023]
Abstract
The important issue associated with the design and the fabrication of the titanium and titanium alloy implants is the increase of their biointegration with bone tissue. In the presented paper, the research results concerning the conditions used in the cathodic deposition of hydroxyapatite on the surface Ti6Al4V substrates primarily modified by the production of TiO2 nanoporous coatings, TiO2 nanofibers, and titanate coatings, are discussed. Despite excellent biocompatibility with natural bone tissue of materials based on hydroxyapatite (HA), their poor adhesion to the substrate caused the limited use in the implants' construction. In our works, we have focused on the comparison of the structure, physicochemical, and mechanical properties of coating systems produced at different conditions. For this purpose, scanning electron microscopy images, chemical composition, X-ray diffraction patterns, infrared spectroscopy, wettability, and mechanical properties are analyzed. Our investigations proved that the intermediate titanium oxide coatings presence significantly increases the adhesion between the hydroxyapatite layer and the Ti6Al4V substrate, thus solving the temporary delamination problems of the HA layer.
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Affiliation(s)
- Michalina Ehlert
- Department of Inorganic and Coordination Chemistry, Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Toruń, Poland
- Nano-Implant Ltd., Gagarina 7/47, 87-100 Toruń, Poland
| | - Aleksandra Radtke
- Department of Inorganic and Coordination Chemistry, Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Toruń, Poland
- Nano-Implant Ltd., Gagarina 7/47, 87-100 Toruń, Poland
| | - Michał Bartmański
- Department of Biomaterials Technology, Faculty of Mechanical Engineering and Ship Technology, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdańsk, Poland
| | - Piotr Piszczek
- Department of Inorganic and Coordination Chemistry, Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Toruń, Poland
- Nano-Implant Ltd., Gagarina 7/47, 87-100 Toruń, Poland
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5
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Kumar R, Mohanty S. Hydroxyapatite: A Versatile Bioceramic for Tissue Engineering Application. J Inorg Organomet Polym Mater 2022. [DOI: 10.1007/s10904-022-02454-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Cold Spraying of Thick Biomimetic and Stoichiometric Apatite Coatings for Orthopaedic Implants. COATINGS 2022. [DOI: 10.3390/coatings12060722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Ceramic coatings have a long history in the orthopaedic field, with plasma sprayed coatings of hydroxyapatite as leading standard in the manufacturing process; however, these coatings can contain secondary phases resulting from the decomposition of hydroxyapatite at high temperatures, which limit the lifetime of implants and their osseointegration. This work aims to produce coatings that can maximize bone osseointegration of metallic implants. In order to preserve the raw characteristics of hydroxyapatite powders that are thermally unstable, coatings were deposited by cold spray onto Ti6Al4V alloy substrates. In contrast with other thermal spray technologies, this process presents the advantage of spraying particles through a supersonic gas jet at a low temperature. On top of hydroxyapatite, carbonated nanocrystalline apatite was synthesized and sprayed. This biomimetic apatite is similar to bone minerals due to the presence of carbonates and its poor crystallinity. FTIR and XRD analyses proved that the biomimetic characteristics and the non-stoichiometric of the apatite were preserved in the cold spray coatings. The cold spray process did not affect the chemistry of the raw material. The adhesion of the coatings as well as their thicknesses were evaluated, showing values comparable to conventional process. Cold spraying appears as a promising method to preserve the characteristics of calcium phosphate ceramics and to produce coatings that offer potentially improved osseointegration.
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Rahnamaee SY, Ahmadi Seyedkhani S, Eslami Saed A, Sadrnezhaad SK, Seza A. Bioinspired TiO2/Chitosan/HA Coatings on Ti Surfaces: Biomedical Improvement by Intermediate Hierarchical Films. Biomed Mater 2022; 17. [PMID: 35349998 DOI: 10.1088/1748-605x/ac61fc] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 03/29/2022] [Indexed: 11/11/2022]
Abstract
The most common reasons for hard-tissue implant failure are structural loosening and prosthetic infections. Hence, to fix the first problem, different bioinspired coatings were applied to the titanium alloy surfaces in this study, including dual acid-etched, anodic TiO2 nanotubes array (TNTs), anodic hierarchical titanium oxide, micro- and nanostructured hydroxyapatite (HA) layers, and HA/chitosan (HA/CS) nanocomposite coating. XRD and FTIR analysis demonstrated that the in situ HA/chitosan nanocomposite formed successfully. The MTT assay showed that all samples had excellent cell viability, with cell proliferation rates ranging from 120-150% after 10 days. The hierarchical coating demonstrated superhydrophilicity (θ ≈ 0°) and increased the wettability of the metallic Ti surface by more than 120%. The friction coefficient of all fabricated surfaces was within the range of natural bone's mechanical behavior. The intermediate hierarchical oxide layer increased the adhesion strength of the HA/chitosan coating by more than 60%. The Hierarchical middle oxide layer caused the mechanical stability of HA/CS during the 1000 m of friction test. The microhardness of HA/CS (22.5 HV) and micro-HA (25.5 HV) coatings was comparable to that of human bone. An intermediate hierarchical oxide-based mechanism for improving adhesion strength in HA/CS coatings was presented.
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Affiliation(s)
- Seyed Yahya Rahnamaee
- Sharif University of Technology, Department of Materials Science and Engineering , Sharif University of Technology , Azadi Ave , Tehran , Iran, Tehran, Tehran, 1458889694, Iran (the Islamic Republic of)
| | - Shahab Ahmadi Seyedkhani
- Materials Science and Engineering, Sharif University of Technology, Department of Materials Science and Engineering , Sharif University of Technology , Azadi Ave , Tehran , Iran, Institute for Nanoscience and Nanotechnology (INST), Sharif University of Technology , Azadi Ave , Tehran , Iran, Tehran, Tehran, 1458889694, Iran (the Islamic Republic of)
| | - Aylar Eslami Saed
- Sharif University of Technology, Azadi Ave., Sharif University of Technology, Tehran, Tehran, 11365-9466, Iran (the Islamic Republic of)
| | - S K Sadrnezhaad
- Materials Science and Engineering, Sharif University of Technology, PO Box 11365-9466, Tehran, Tehran, 1458889694, Iran (the Islamic Republic of)
| | - Ashkan Seza
- Sharif University of Technology, Azadi Ave., Sharif University of Technology, Tehran, Tehran, 11365-9466, Iran (the Islamic Republic of)
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Demirci S, Sahiner M, Suner SS, Sahiner N. Improved Biomedical Properties of Polydopamine-Coated Carbon Nanotubes. MICROMACHINES 2021; 12:1280. [PMID: 34832691 PMCID: PMC8623995 DOI: 10.3390/mi12111280] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 10/17/2021] [Accepted: 10/19/2021] [Indexed: 11/21/2022]
Abstract
Carbon nanotubes (CNTs) due to their outstanding mechanical, thermal, chemical, and optical properties were utilized as a base material and were coated with polydopamine (PDA) (PDA@CNT) via the simple self-polymerization of dopamine (DA). Then, PDA@CNT coatings of up to five layers were examined for potential biomedical applications. The success of multiple coating of CNTs with PDA was confirmed via increased weight loss values with the increased number of PDA coatings of CNTs at 500 °C by thermogravimetric analysis. The surface area of bare CNTs was measured as 263.9 m2/g and decreased to 197.0 m2/g after a 5th coating with PDA. Furthermore, the antioxidant activities of CNT and PDA@CNTs were determined via total flavonoid content (TFC), total phenol content (TPC), and Fe(III)-reducing antioxidant power (FRAP) tests, revealing the increased antioxidant ability of PDA@CNTs with the increasing numbers of PDA coatings. Moreover, a higher inhibition percentage of the activity of the alpha-glucosidase enzyme with 95.1 ± 2.9% inhibition at 6 mg/mL PDA-1st@CNTs concentration was found. The CNT and PDA@CNTs exhibited blood compatibility, less than a 2.5% hemolysis ratio, and more than 85% blood clotting indexes. The minimum inhibition concentration (MIC) of PDA-5th@CNTs against E. coli and S. aureus bacteria was determined as 10 mg/mL.
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Affiliation(s)
- Sahin Demirci
- Department of Chemistry, Faculty of Sciences and Arts, Canakkale Onsekiz Mart University, Terzioglu Campus, Canakkale 17100, Turkey; (S.D.); (S.S.S.)
- Nanoscience and Technology Research and Application Center, Canakkale Onsekiz Mart University, Terzioglu Campus, Canakkale 17100, Turkey
| | - Mehtap Sahiner
- Faculty of Canakkale School of Applied Science, Canakkale Onsekiz Mart University, Terzioglu Campus, Canakkale 17100, Turkey;
| | - Selin Sagbas Suner
- Department of Chemistry, Faculty of Sciences and Arts, Canakkale Onsekiz Mart University, Terzioglu Campus, Canakkale 17100, Turkey; (S.D.); (S.S.S.)
| | - Nurettin Sahiner
- Department of Chemistry, Faculty of Sciences and Arts, Canakkale Onsekiz Mart University, Terzioglu Campus, Canakkale 17100, Turkey; (S.D.); (S.S.S.)
- Faculty of Canakkale School of Applied Science, Canakkale Onsekiz Mart University, Terzioglu Campus, Canakkale 17100, Turkey;
- Department of Chemical and Biomolecular Engineering, University of South Florida, Tampa, FL 33620, USA
- Department of Ophthalmology, Morsani College of Medicine, University of South Florida, 12901 Bruce B Downs B. Downs Blv., MDC 21, Tampa, FL 33612, USA
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9
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Rehman FU, Mahmood R, Ali MB, Hedfi A, Almalki M, Mezni A, Rehman W, Haq S, Afsar H. Bergenia ciliate-Mediated Mixed-Phase Synthesis and Characterization of Silver-Copper Oxide Nanocomposite for Environmental and Biological Applications. MATERIALS (BASEL, SWITZERLAND) 2021; 14:6085. [PMID: 34683677 PMCID: PMC8549009 DOI: 10.3390/ma14206085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 09/30/2021] [Accepted: 09/30/2021] [Indexed: 11/16/2022]
Abstract
Bergenia ciliate (B. ciliate) leaf extract was used as a reducing and stabilizing agent for the synthesis of silver-copper oxide nanocomposite (Ag-CuO NC). Scanning and transmission electron microscopies (SEM and TEM) were used to examine the structural morphology, and the average particle size was determined to be 47.65 nm. The phase confirmation and crystalline structure were examined through the X-ray diffraction (XRD) technique, where cubic and monoclinic geometries were assigned to Ag and CuO. The energy dispersive X-ray (EDX), Fourier transform infrared (FTIR) and ultra-violet and visible (UV-Visible) spectroscopies were operated to analyse the elemental composition, functional groups and light absorption phenomena of the Ag-CuO NC. Under the full light spectrum, the photodegradation of Rhodamine 6G was recorded, and 99.42 percent of the dye degraded in 80 min. The Agar well diffusion method was followed to perform antibacterial activity against selected pathogens, and the activity was found to increase with increasing concentration of Ag-CuO NC. The ABTS free radical scavenging activity suggests that the activity of Ag-CuO NC is higher than ascorbic acid.
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Affiliation(s)
- Fazal Ur Rehman
- Department of Chemistry, University of Azad Jammu and Kashmir, Muzffarabad 13100, Pakistan; (F.U.R.); (R.M.); (H.A.)
| | - Rashid Mahmood
- Department of Chemistry, University of Azad Jammu and Kashmir, Muzffarabad 13100, Pakistan; (F.U.R.); (R.M.); (H.A.)
| | - Manel Ben Ali
- Department of Biology, College of Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia; (M.B.A.); (A.H.); (M.A.)
| | - Amor Hedfi
- Department of Biology, College of Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia; (M.B.A.); (A.H.); (M.A.)
| | - Mohammed Almalki
- Department of Biology, College of Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia; (M.B.A.); (A.H.); (M.A.)
| | - Amine Mezni
- Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;
| | - Wajid Rehman
- Department of Chemistry, Hazara University, Mansehra 21300, Pakistan;
| | - Sirajul Haq
- Department of Chemistry, University of Azad Jammu and Kashmir, Muzffarabad 13100, Pakistan; (F.U.R.); (R.M.); (H.A.)
| | - Humma Afsar
- Department of Chemistry, University of Azad Jammu and Kashmir, Muzffarabad 13100, Pakistan; (F.U.R.); (R.M.); (H.A.)
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Silver-Releasing Micro-/Nanoporous Coating on Additively Manufactured Macroporous Ti-Ta-Nb-Zr Scaffolds with High Osseointegration and Antibacterial Properties. COATINGS 2021. [DOI: 10.3390/coatings11060716] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The two major problems of titanium alloy surface of bone/dental implants were the lack of native tissue integration and associated infection. To solve these problems, the development of self-defending implants with intrinsic osteogenic properties has been highlighted, in which titanium alloy surfaces of bone/dental implants are endowed with antibacterial property by silver (Ag) incorporated in biomaterials. In this study, we biofunctionalized the surface of selective laser melting (SLM) manufactured volume-porous Ti-Ta-Nb-Zr scaffolds by using plasma electrolytic oxidation (PEO) as a way to eliminate the peri-operative bacterial load and promote osseointegration. In the experiment, the PEO process operated with three different concentration (1, 1, and 2 g/L) of a AgNO3 solution. As a result, a titanium oxide coating embedded with calcium and phosphorous and Ag was formed by one-step PEO treatment, and a presence of HAp was detected by X-ray diffraction (XRD) and XPS. In addition, Ag ions were found to be released from the scaffolds for at least 28 days, resulting in an effective prevention of bacterial adhesion and a decrease of the number of planktonic bacteria, with no sign of cytotoxicity shown simultaneously. Highly porosity micropores were formed on the surface of scaffolds after oxidation, and the mechanical properties did not show any signs of change. Besides, a strong calcium deposition and osteoconductive effect were found on the surface of PEO-treated Ag scaffolds. To sum up, this study reveals the potential of PEO coatings to biofunctionalize SLM Ti-Ta-Nb-Zr scaffolds with antibacterial agents. The biomaterials developed here, therefore, exploit the biofunctionalized behavior of Ag to offer strong antibacterial behavior and osteogenic promotion without cytotoxicity of Ag against mammalian cells.
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Capellato P, Camargo SEA, Sachs D. Biological Response to Nanosurface Modification on Metallic Biomaterials. Curr Osteoporos Rep 2020; 18:790-795. [PMID: 33085001 DOI: 10.1007/s11914-020-00635-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/09/2020] [Indexed: 12/20/2022]
Abstract
PURPOSE OF REVIEW New biomaterials for biomedical applications have been developed over the past few years. This work summarizes the current cell lines investigations regarding nanosurface modifications to improve biocompatibility and osseointegration. RECENT FINDINGS Material surfaces presenting biomimetic morphology that provides nanoscale architectures have been shown to alter cell/biomaterial interactions. Topographical and biofunctional surface modifications present a positive effect between material and host response. Nanoscale surfaces on titanium have the potential to provide a successful interface for implantable biomedical devices. Future studies need to directly evaluate how the titanium nanoscale materials will perform in in vivo experiments. Biocompatibility should be determined to identify titanium nanoscale as an excellent option for implant procedures.
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Affiliation(s)
- Patricia Capellato
- Institute of Physics and Chemistry, Unifei- Federal University of Itajubá, Av. BPS, 1303, Itajubá, MG, 37500 903, Brazil.
| | - Samira Esteves Afonso Camargo
- Restorative Dental Sciences, Division of Prosthodontics, University of Florida, College of Dentistry, Gainesville, FL, USA
| | - Daniela Sachs
- Institute of Physics and Chemistry, Unifei- Federal University of Itajubá, Av. BPS, 1303, Itajubá, MG, 37500 903, Brazil
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Low-Cost Deposition of Antibacterial Ion-Substituted Hydroxyapatite Coatings onto 316L Stainless Steel for Biomedical and Dental Applications. COATINGS 2020. [DOI: 10.3390/coatings10090880] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Substitutions of ions into an apatitic lattice may result in antibacterial properties. In this study, magnesium (Mg)-, zinc (Zn)-, and silicon (Si)-substituted hydroxyapatite (HA) were synthesized using a microwave irradiation technique. Polyvinyl alcohol (PVA) was added during the synthesis of the substituted HA as a binding agent. The synthesized Mg-, Zn-, and Si-substituted HAs were then coated onto a 316L-grade stainless-steel substrate using low-cost electrophoretic deposition (EPD), thereby avoiding exposure to high temperatures. The deposited layer thickness was measured and the structural, phase and morphological analysis were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscope (SEM), respectively. The bacterial adhesion of Staphylococcus aureus was characterized at 30 min, 2 h and 6 h. The results showed homogeneous, uniform thickness (50–70 µm) of the substrate. FTIR and XRD showed the characteristic spectral peaks of HA, where the presence of Mg, Zn and Si changed the spectral peak intensities. The Mg–HA coating showed the least bacterial adhesion at 30 min and 2 h. In contrast, the Si–HA coating showed the least adhesion at 6 h. EPD showed an effective way to get a uniform coating on bio-grade metal implants, where ionic-substituted HA appeared as alternative coating material compared to conventional HA and showed the least bacterial adhesion.
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Hasan KMF, Horváth PG, Alpár T. Potential Natural Fiber Polymeric Nanobiocomposites: A Review. Polymers (Basel) 2020; 12:E1072. [PMID: 32392800 PMCID: PMC7284945 DOI: 10.3390/polym12051072] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 04/29/2020] [Accepted: 04/30/2020] [Indexed: 01/16/2023] Open
Abstract
Composite materials reinforced with biofibers and nanomaterials are becoming considerably popular, especially for their light weight, strength, exceptional stiffness, flexural rigidity, damping property, longevity, corrosion, biodegradability, antibacterial, and fire-resistant properties. Beside the traditional thermoplastic and thermosetting polymers, nanoparticles are also receiving attention in terms of their potential to improve the functionality and mechanical performances of biocomposites. These remarkable characteristics have made nanobiocomposite materials convenient to apply in aerospace, mechanical, construction, automotive, marine, medical, packaging, and furniture industries, through providing environmental sustainability. Nanoparticles (TiO2, carbon nanotube, rGO, ZnO, and SiO2) are easily compatible with other ingredients (matrix polymer and biofibers) and can thus form nanobiocomposites. Nanobiocomposites are exhibiting a higher market volume with the expansion of new technology and green approaches for utilizing biofibers. The performances of nanobiocomposites depend on the manufacturing processes, types of biofibers used, and the matrix polymer (resin). An overview of different natural fibers (vegetable/plants), nanomaterials, biocomposites, nanobiocomposites, and manufacturing methods are discussed in the context of potential application in this review.
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Affiliation(s)
- K. M. Faridul Hasan
- Simonyi Károly Faculty of Engineering, University of Sopron, Sopron, 9400 Gyor, Hungary;
| | | | - Tibor Alpár
- Simonyi Károly Faculty of Engineering, University of Sopron, Sopron, 9400 Gyor, Hungary;
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