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Mohammadnejad L, Theurer A, Alber J, Illing B, Kimmerle-Mueller E, Schultheiss J, Krajewski S, Rupp F. Surface-Mediated Modulation of Different Biological Responses on Anatase-Coated Titanium. J Funct Biomater 2024; 15:29. [PMID: 38391882 PMCID: PMC10889146 DOI: 10.3390/jfb15020029] [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: 12/04/2023] [Revised: 01/15/2024] [Accepted: 01/19/2024] [Indexed: 02/24/2024] Open
Abstract
Various surface modification strategies are being developed to endow dental titanium implant surfaces with micro- and nano-structures to improve their biocompatibility, and first of all their osseointegration. These modifications have the potential to address clinical concerns by stimulating different biological processes. This study aims to evaluate the biological responses of ananatase-modified blasted/etched titanium (SLA-anatase) surfaces compared to blasted/acid etched (SLA) and machined titanium surfaces. Using unipolar pulsed direct current (DC) sputtering, a nanocrystalline anatase layer was fabricated. In vitro experiments have shown that SLA-anatase discs can effectively promote osteoblast adhesion and proliferation, which are regarded as important features of a successful dental implant with bone contact. Furthermore, anatase surface modification has been shown to partially enhance osteoblast mineralization in vitro, while not significantly affecting bacterial colonization. Consequently, the recently created anatase coating holds significant potential as a promising candidate for future advancements in dental implant surface modification for improving the initial stages of osseointegration.
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Affiliation(s)
- Leila Mohammadnejad
- Department Medical Materials Science & Technology, Institute for Biomedical Engineering, University Hospital Tübingen, Osianderstr. 2-8, 72076 Tübingen, Germany
| | - Antonia Theurer
- Department Medical Materials Science & Technology, Institute for Biomedical Engineering, University Hospital Tübingen, Osianderstr. 2-8, 72076 Tübingen, Germany
| | - Julia Alber
- Department Medical Materials Science & Technology, Institute for Biomedical Engineering, University Hospital Tübingen, Osianderstr. 2-8, 72076 Tübingen, Germany
| | - Barbara Illing
- Department Medical Materials Science & Technology, Institute for Biomedical Engineering, University Hospital Tübingen, Osianderstr. 2-8, 72076 Tübingen, Germany
| | - Evi Kimmerle-Mueller
- Department Medical Materials Science & Technology, Institute for Biomedical Engineering, University Hospital Tübingen, Osianderstr. 2-8, 72076 Tübingen, Germany
| | - Jacob Schultheiss
- Department Medical Materials Science & Technology, Institute for Biomedical Engineering, University Hospital Tübingen, Osianderstr. 2-8, 72076 Tübingen, Germany
| | - Stefanie Krajewski
- Department Medical Materials Science & Technology, Institute for Biomedical Engineering, University Hospital Tübingen, Osianderstr. 2-8, 72076 Tübingen, Germany
| | - Frank Rupp
- Department Medical Materials Science & Technology, Institute for Biomedical Engineering, University Hospital Tübingen, Osianderstr. 2-8, 72076 Tübingen, Germany
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2
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Ali A, Chowdhury S, Janorkar A, Marquart M, Griggs JA, Bumgardner J, Roach MD. A novel single-step anodization approach for PANI-doping oxide surfaces to improve the photocatalytic activity of titanium implants. Biomed Mater 2022; 18:015010. [PMID: 36384042 DOI: 10.1088/1748-605x/aca37d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Crystalline titanium oxides have shown photocatalytic activity (PCA) and the formation of antibacterial reactive oxygen species (ROS) when stimulated with UV light. Polyaniline (PANI) is a conductive polymer that has shown antibacterial effects. Previously, titanium oxides have been PANI-doped using a multi-step approach. In the present study, we compared PANI-doped specimens produced with a two-step method (ACV), to PANI-doped specimens produced by a novel single-step direct anodization (AAn) method, and a control group of anodized un-doped specimens. The surface morphology, oxide crystallinity, surface elemental composition, surface roughness, surface wettability, oxide adhesion, corrosion resistance, PCA, and ROS generation of each oxide group were evaluated. All groups exhibited mixed anatase and rutile phase oxides. The AAn group revealed less anatase and rutile, but more PANI-surface coverage. The AAn group exhibited significantly increased PCA after 60 minutes of direct UVA illumination compared to the ACV group, despite containing lower amounts of anatase and rutile. The ACV and AAn groups showed significant increases in ROS production after 4 hours UVA illumination while the control group showed similar ROS production. These findings suggested that PANI doping using the novel direct anodization technique significantly improved PCA even for oxides containing less crystallinity. The S. aureus attachment response to each oxide group was also compared under UVA pre-illumination, UVA direct illumination, and no illumination (dark) lighting conditions. Although no significant differences were shown in the bacterial response, both PANI-doped groups exhibited less average bacterial attachment compared to the control group. The response of MC3T3-E1 pre-osteoblast cells to each oxide group was evaluated using MTT and live/dead assays, and no evidence of cytotoxicity was found. Since many, if not most, titanium implant devices are routinely anodized as a part of the manufacturing processes, these study findings are applicable to a wide variety of implant applications.
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Affiliation(s)
- Aya Ali
- Department of Biomedical Materials Science, D528, The University of Mississippi Medical Center, 2500 North State Street, Jackson, Mississippi, 39216-4505, UNITED STATES
| | - Sheetal Chowdhury
- Department of Biomedical Materials Science, D528, The University of Mississippi Medical Center, 2500 North State Street, Jackson, Mississippi, 39216-4505, UNITED STATES
| | - Amol Janorkar
- Department of Biomedical Materials Science, D528, The University of Mississippi Medical Center, School of Dentistry, 2500 North State Street, Jackson, Mississippi, 39216-4505, UNITED STATES
| | - Mary Marquart
- Department of Microbiology and Immunology, The University of Mississippi Medical Center, 2500 North State Street, Jackson, Mississippi, 39216-4505, UNITED STATES
| | - Jason A Griggs
- Department of Biomedical Materials Science, D528, The University of Mississippi Medical Center, School of Dentistry, 2500 North State Street, Jackson, Mississippi, 39216-4505, UNITED STATES
| | - Joel Bumgardner
- Biomedical Engineering Department, The University of Memphis Herff College of Engineering, Engineering Technology Building, 330, Memphis, Tennessee, 38152, UNITED STATES
| | - Michael D Roach
- Department of Biomedical Materials Science, D528, The University of Mississippi Medical Center, 2500 North State Street, School of Dentistry, Jackson, Mississippi, 39216, UNITED STATES
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3
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Chakraborty N, Jha D, Roy I, Kumar P, Gaurav SS, Marimuthu K, Ng OT, Lakshminarayanan R, Verma NK, Gautam HK. Nanobiotics against antimicrobial resistance: harnessing the power of nanoscale materials and technologies. J Nanobiotechnology 2022; 20:375. [PMID: 35953826 PMCID: PMC9371964 DOI: 10.1186/s12951-022-01573-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Accepted: 07/25/2022] [Indexed: 11/16/2022] Open
Abstract
Given the spasmodic increment in antimicrobial resistance (AMR), world is on the verge of “post-antibiotic era”. It is anticipated that current SARS-CoV2 pandemic would worsen the situation in future, mainly due to the lack of new/next generation of antimicrobials. In this context, nanoscale materials with antimicrobial potential have a great promise to treat deadly pathogens. These functional materials are uniquely positioned to effectively interfere with the bacterial systems and augment biofilm penetration. Most importantly, the core substance, surface chemistry, shape, and size of nanomaterials define their efficacy while avoiding the development of AMR. Here, we review the mechanisms of AMR and emerging applications of nanoscale functional materials as an excellent substitute for conventional antibiotics. We discuss the potential, promises, challenges and prospects of nanobiotics to combat AMR.
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Affiliation(s)
- Nayanika Chakraborty
- Department of Chemistry, University of Delhi, New Delhi, 110007, India.,Department of Immunology and Infectious Disease Biology, CSIR-Institute of Genomics and Integrative Biology, Sukhdev Vihar, New Delhi, 110025, India
| | - Diksha Jha
- Department of Immunology and Infectious Disease Biology, CSIR-Institute of Genomics and Integrative Biology, Sukhdev Vihar, New Delhi, 110025, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Indrajit Roy
- Department of Chemistry, University of Delhi, New Delhi, 110007, India
| | - Pradeep Kumar
- CSIR-Institute of Genomics and Integrative Biology, Mall Road, Delhi University Campus, 110007, New Delhi, India
| | - Shailendra Singh Gaurav
- Department of Genetics and Plant Breeding, Faculty of Agriculture, Chaudhary Charan Singh University, Meerut, 250004, India
| | - Kalisvar Marimuthu
- National Centre for Infectious Diseases (NCID), Singapore, 308442, Singapore.,Tan Tock Seng Hospital (TTSH), 308433, Singapore, Singapore
| | - Oon-Tek Ng
- National Centre for Infectious Diseases (NCID), Singapore, 308442, Singapore.,Tan Tock Seng Hospital (TTSH), 308433, Singapore, Singapore
| | - Rajamani Lakshminarayanan
- Ocular Infections and Anti-Microbials Research Group, Singapore Eye Research Institute, The Academia, 20 College Road, Singapore, 169856, Singapore. .,Department of Pharmacy, National University of Singapore, Singapore, 117543, Singapore. .,Academic Clinical Program in Ophthalmology and Visual Sciences Academic Clinical Program, Duke-NUS Medical School, Singapore, 169857, Singapore.
| | - Navin Kumar Verma
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, Clinical Sciences Building, 11 Mandalay Road, Singapore, 308232, Singapore. .,National Skin Centre, Singapore, 308205, Singapore.
| | - Hemant K Gautam
- Department of Immunology and Infectious Disease Biology, CSIR-Institute of Genomics and Integrative Biology, Sukhdev Vihar, New Delhi, 110025, India.
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4
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Mubeen B, Ansar AN, Rasool R, Ullah I, Imam SS, Alshehri S, Ghoneim MM, Alzarea SI, Nadeem MS, Kazmi I. Nanotechnology as a Novel Approach in Combating Microbes Providing an Alternative to Antibiotics. Antibiotics (Basel) 2021; 10:1473. [PMID: 34943685 PMCID: PMC8698349 DOI: 10.3390/antibiotics10121473] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 11/19/2021] [Accepted: 11/25/2021] [Indexed: 12/15/2022] Open
Abstract
The emergence of infectious diseases promises to be one of the leading mortality factors in the healthcare sector. Although several drugs are available on the market, newly found microorganisms carrying multidrug resistance (MDR) against which existing drugs cannot function effectively, giving rise to escalated antibiotic dosage therapies and the need to develop novel drugs, which require time, money, and manpower. Thus, the exploitation of antimicrobials has led to the production of MDR bacteria, and their prevalence and growth are a major concern. Novel approaches to prevent antimicrobial drug resistance are in practice. Nanotechnology-based innovation provides physicians and patients the opportunity to overcome the crisis of drug resistance. Nanoparticles have promising potential in the healthcare sector. Recently, nanoparticles have been designed to address pathogenic microorganisms. A multitude of processes that can vary with various traits, including size, morphology, electrical charge, and surface coatings, allow researchers to develop novel composite antimicrobial substances for use in different applications performing antimicrobial activities. The antimicrobial activity of inorganic and carbon-based nanoparticles can be applied to various research, medical, and industrial uses in the future and offer a solution to the crisis of antimicrobial resistance to traditional approaches. Metal-based nanoparticles have also been extensively studied for many biomedical applications. In addition to reduced size and selectivity for bacteria, metal-based nanoparticles have proven effective against pathogens listed as a priority, according to the World Health Organization (WHO). Moreover, antimicrobial studies of nanoparticles were carried out not only in vitro but in vivo as well in order to investigate their efficacy. In addition, nanomaterials provide numerous opportunities for infection prevention, diagnosis, treatment, and biofilm control. This study emphasizes the antimicrobial effects of nanoparticles and contrasts nanoparticles' with antibiotics' role in the fight against pathogenic microorganisms. Future prospects revolve around developing new strategies and products to prevent, control, and treat microbial infections in humans and other animals, including viral infections seen in the current pandemic scenarios.
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Affiliation(s)
- Bismillah Mubeen
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore 54000, Pakistan; (B.M.); (A.N.A.); (R.R.); (I.U.)
| | - Aunza Nayab Ansar
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore 54000, Pakistan; (B.M.); (A.N.A.); (R.R.); (I.U.)
| | - Rabia Rasool
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore 54000, Pakistan; (B.M.); (A.N.A.); (R.R.); (I.U.)
| | - Inam Ullah
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore 54000, Pakistan; (B.M.); (A.N.A.); (R.R.); (I.U.)
| | - Syed Sarim Imam
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (S.S.I.); (S.A.)
| | - Sultan Alshehri
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (S.S.I.); (S.A.)
| | - Mohammed M. Ghoneim
- Department of Pharmacy Practice, College of Pharmacy, AlMaarefa University, Ad Diriyah 13713, Saudi Arabia;
| | - Sami I. Alzarea
- Department of Pharmacology, College of Pharmacy, Jouf University, Sakaka 72341, Saudi Arabia;
| | - Muhammad Shahid Nadeem
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Imran Kazmi
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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Cai Y, Bing W, Xu X, Zhang Y, Chen Z, Gu Z. Topographical nanostructures for physical sterilization. Drug Deliv Transl Res 2021; 11:1376-1389. [PMID: 33543396 DOI: 10.1007/s13346-021-00906-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/11/2021] [Indexed: 01/24/2023]
Abstract
The development in nanobiotechnology provides an in-depth understanding of cell-surface interactions at the nanoscale level. Particularly, several surface features have shown the ability to interrogate the bacterial behavior and fate. In the past decade, the mechanical and physical sterilization has attracted considerable attention, as paradigms of such do not rely on chemical substances to damage or kill bacteria, whereas it is associated with natural living organisms or synthetic materials. Of note, such antibacterial scenario does not cause bacterial resistance, as the morphology of nanometer can directly cause bacterial death through physical and mechanical interactions. In this review, we provide an overview of recently developed technologies of leveraging topographical nanofeatures for physical sterilization. We mainly discuss the development of various morphologic nanostructures, and colloidal nanostructures show casing the capacity of "mechanical sterilization." Mechanically sterilized nanostructures can penetrate or cut through bacterial membranes. In addition, surface morphology, such as mechanical bactericidal nanoparticles and nanoneedles, can cause damage to the membrane of microorganisms, leading to cell lysis and death. Although the research in the field of mechanical sterilization is still in infancy, the effect of these nanostructure morphologies on sterilization has shown remarkable antibacterial potential, which could provide a new toolkit for anti-infection and antifouling applications. The mechanical and physical sterilization has attracted considerable attention, as paradigms of such do not rely on chemical substances to damage or kill bacteria. Moreover, such antibacterial scenario does not cause bacterial resistance, as the morphology of nanometer can directly cause bacterial death through physical and mechanical interactions. In this review, we focus on the advanced development of various morphologic nanostructures and colloidal nanostructures that show the capacity of "mechanical sterilization."
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Affiliation(s)
- Yujie Cai
- School of Chemistry and Life Science, Changchun University of Technology, 2055 Yanan Street, 130012, Changchun, People's Republic of China.,Advanced Institute of Materials Science, Changchun University of Technology, 2055 Yanan Street, 130012, Changchun, People's Republic of China
| | - Wei Bing
- School of Chemistry and Life Science, Changchun University of Technology, 2055 Yanan Street, 130012, Changchun, People's Republic of China. .,Advanced Institute of Materials Science, Changchun University of Technology, 2055 Yanan Street, 130012, Changchun, People's Republic of China.
| | - Xiao Xu
- Institute of Food Safety and Environment Monitoring, College of Chemistry, Fuzhou University, 350108, Fuzhou, People's Republic of China
| | - Yuqi Zhang
- College of Pharmaceutical Sciences, Zhejiang University, 310058, Hangzhou, People's Republic of China
| | - Zhaowei Chen
- Institute of Food Safety and Environment Monitoring, College of Chemistry, Fuzhou University, 350108, Fuzhou, People's Republic of China
| | - Zhen Gu
- College of Pharmaceutical Sciences, Zhejiang University, 310058, Hangzhou, People's Republic of China.
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6
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Ota T, Demura S, Kato S, Yoshioka K, Hayashi H, Inoue K, Shinmura K, Yokogawa N, Shirai T, Murakami H, Tsuchiya H. A comparison of bone conductivity on titanium screws inserted into the vertebra using different surface processing. J Exp Orthop 2020; 7:29. [PMID: 32405666 PMCID: PMC7221053 DOI: 10.1186/s40634-020-00250-w] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 05/08/2020] [Indexed: 11/10/2022] Open
Abstract
PURPOSE Antibacterial iodine-supported titanium has an anodized oxide layer; thus, it can be expected to have a higher osteoconductivity than untreated titanium. This study aimed to compare the osteoconductivity between untreated titanium (Ti), anodically oxidized titanium (AO-Ti), and iodine-supported titanium (I-Ti) screws. METHODS The screws were inserted into the vertebral bodies of 30 dogs (12 for the biomechanical, and 18 for the histological examination). The vertebral bodies were analyzed at 4 or 8 weeks after screw insertion. Biomechanically, rotational torque of the screw was measured. Histologically, bone formation index (ratio of the length of the part where the bone directly contacts with the length of the screw) and bone volume density (ratio of the area of the bone tissue to the area between the threads of the screw) were measured. RESULT At 4 weeks, the torque value was significantly higher in the AO-Ti (0.59 ± 0.16 Nm) and I-Ti (0.72 ± 0.14 Nm) groups than in the Ti group (0.39 ± 0.12 Nm), with the AO-Ti and I-Ti groups showing no significant difference. Bone formation index was significantly higher in the AO-Ti (72.5% ± 0.8%) and I-Ti (73.4% ± 1.5%) groups than in the Ti group (64.6% ±1.7%), with the AO-Ti and I-Ti groups showing no significant difference. Bone volume density did not show a significant difference. At 8 weeks, the results were similar to those at 4 weeks. CONCLUSIONS I-Ti had a higher osteoconductivity than Ti, indicating that iodine coating did not adversely affect osteoconductivity.
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Affiliation(s)
- Takashi Ota
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kanazawa University, 13-1, Takara-machi, Kanazawa, 920-8641, Japan
| | - Satoru Demura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kanazawa University, 13-1, Takara-machi, Kanazawa, 920-8641, Japan.
| | - Satoshi Kato
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kanazawa University, 13-1, Takara-machi, Kanazawa, 920-8641, Japan
| | - Katsuhito Yoshioka
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kanazawa University, 13-1, Takara-machi, Kanazawa, 920-8641, Japan
| | - Hiroyuki Hayashi
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kanazawa University, 13-1, Takara-machi, Kanazawa, 920-8641, Japan
| | - Kei Inoue
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kanazawa University, 13-1, Takara-machi, Kanazawa, 920-8641, Japan
| | - Kazuya Shinmura
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kanazawa University, 13-1, Takara-machi, Kanazawa, 920-8641, Japan
| | - Noriaki Yokogawa
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kanazawa University, 13-1, Takara-machi, Kanazawa, 920-8641, Japan
| | - Toshiharu Shirai
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Hideki Murakami
- Department of Orthopaedic Surgery, Nagoya City University Medical School, 1-Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8602, Japan
| | - Hiroyuki Tsuchiya
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kanazawa University, 13-1, Takara-machi, Kanazawa, 920-8641, Japan
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Naskar A, Kim KS. Nanomaterials as Delivery Vehicles and Components of New Strategies to Combat Bacterial Infections: Advantages and Limitations. Microorganisms 2019; 7:E356. [PMID: 31527443 PMCID: PMC6780078 DOI: 10.3390/microorganisms7090356] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 09/11/2019] [Accepted: 09/14/2019] [Indexed: 02/07/2023] Open
Abstract
Life-threatening bacterial infections have been well-controlled by antibiotic therapies and this approach has greatly improved the health and lifespan of human beings. However, the rapid and worldwide emergence of multidrug resistant (MDR) bacteria has forced researchers to find alternative treatments for MDR infections as MDR bacteria can sometimes resist all the present day antibiotic therapies. In this respect, nanomaterials have emerged as innovative antimicrobial agents that can be a potential solution against MDR bacteria. The present review discusses the advantages of nanomaterials as potential medical means and carriers of antibacterial activity, the types of nanomaterials used for antibacterial agents, strategies to tackle toxicity of nanomaterials for clinical applications, and limitations which need extensive studies to overcome. The current progress of using different types of nanomaterials, including new emerging strategies for the single purpose of combating bacterial infections, is also discussed in detail.
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Affiliation(s)
- Atanu Naskar
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Korea
| | - Kwang-Sun Kim
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Korea.
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Pre–post evaluation of effects of a titanium dioxide coating on environmental contamination of an intensive care unit: the TITANIC study. J Hosp Infect 2018; 99:256-262. [DOI: 10.1016/j.jhin.2017.04.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Accepted: 04/09/2017] [Indexed: 12/29/2022]
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9
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Monmaturapoj N, Sri-On A, Klinsukhon W, Boonnak K, Prahsarn C. Antiviral activity of multifunctional composite based on TiO 2-modified hydroxyapatite. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 92:96-102. [PMID: 30184826 DOI: 10.1016/j.msec.2018.06.045] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 05/11/2018] [Accepted: 06/18/2018] [Indexed: 11/30/2022]
Abstract
An antiviral activity of TiO2-modified hydroxyapatite composite (HA/TiO2) had been investigated. The HA/TiO2 composite (HA50:Ti50) was prepared by a solid state reaction method followed by calcination at 650 °C for 2 h. Phase formations and morphologies of the obtained HA/TiO2 composite powders were determined using XRD and SEM. XRD result confirmed that HA/TiO2 composite was successfully prepared. SEM revealed small crystals of anatase TiO2 embedded in larger HA crystals. A strong antiviral activity against H1N1 Influenza A Virus was observed at 0.5 mg/ml concentration of the composite under the UV irradiation for 60 min. It showed the highest rate of reducing virus titer approximately more than 2 log/h. Results obtained from this study indicated that HA/TiO2 composite could be a promising material to be used as antimicrobial filtration applications such as in face masks.
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Affiliation(s)
- Naruporn Monmaturapoj
- National Metal and Materials Technology Center, 114 Thailand Science Park, Pathumthani 12120, Thailand.
| | - Autcharaporn Sri-On
- National Metal and Materials Technology Center, 114 Thailand Science Park, Pathumthani 12120, Thailand
| | - Wattana Klinsukhon
- National Metal and Materials Technology Center, 114 Thailand Science Park, Pathumthani 12120, Thailand
| | - Kobporn Boonnak
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, 10400 Bangkok, Thailand
| | - Chureerat Prahsarn
- National Metal and Materials Technology Center, 114 Thailand Science Park, Pathumthani 12120, Thailand
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Kuroiwa A, Nomura Y, Ochiai T, Sudo T, Nomoto R, Hayakawa T, Kanzaki H, Nakamura Y, Hanada N. Antibacterial, Hydrophilic Effect and Mechanical Properties of Orthodontic Resin Coated with UV-Responsive Photocatalyst. MATERIALS 2018; 11:ma11060889. [PMID: 29799473 PMCID: PMC6025295 DOI: 10.3390/ma11060889] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 05/19/2018] [Accepted: 05/21/2018] [Indexed: 11/16/2022]
Abstract
Photocatalysts have multiple applications in air purifiers, paints, and self-cleaning coatings for medical devices such as catheters, as well as in the elimination of xenobiotics. In this study, a coating of a UV-responsive photocatalyst, titanium dioxide (TiO₂), was applied to an orthodontic resin. The antibacterial activity on oral bacteria as well as hydrophilic properties and mechanical properties of the TiO₂-coated resin were investigated. ultraviolet A (UVA) (352 nm) light was used as the light source. Antibacterial activity was examined with or without irradiation. Measurements of early colonizers and cariogenic bacterial count, i.e., colony forming units (CFU), were performed after irradiation for different time durations. Hydrophilic properties were evaluated by water contact angle measurements. While, for the assessment of mechanical properties, flexural strength was measured by the three-point bending test. In the coat(+)light(+) samples the CFU were markedly decreased compared to the control samples. Water contact angle of the coat(+)light(+) samples was decreased after irradiation. The flexural strength of the specimen irradiated for long time showed a higher value than the required standard value, indicating that the effect of irradiation was weak. We suggest that coating with the ultraviolet responsive photocatalyst TiO₂ is useful for the development of orthodontic resin with antimicrobial properties.
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Affiliation(s)
- Akira Kuroiwa
- Department of Orthodontics, Tsurumi University School of Dental Medicine, Yokohama 230-8501, Japan.
| | - Yoshiaki Nomura
- Department of Translational Research, Tsurumi University School of Dental Medicine, Yokohama 230-8501, Japan.
| | - Tsuyoshi Ochiai
- Photocatalyst Group, Research and Development Department, Local Independent Administrative Agency Kanagawa Institute of industrial Science and TEChnology (KISTEC), 407 East Wing, Innovation Center Building, KSP, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, Japan.
- Materials Analysis Group, Kawasaki Technical Support Department, KISTEC, Ground Floor East Wing, Innovation Center Building, KSP, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, Japan.
- Photocatalysis International Research Center, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan.
| | - Tomomi Sudo
- Department of Orthodontics, Tsurumi University School of Dental Medicine, Yokohama 230-8501, Japan.
| | - Rie Nomoto
- Department of Dental Engineering, Tsurumi University School of Dental Medicine, Yokohama 230-8501, Japan.
| | - Tohru Hayakawa
- Department of Dental Engineering, Tsurumi University School of Dental Medicine, Yokohama 230-8501, Japan.
| | - Hiroyuki Kanzaki
- Department of Orthodontics, Tsurumi University School of Dental Medicine, Yokohama 230-8501, Japan.
| | - Yoshiki Nakamura
- Department of Orthodontics, Tsurumi University School of Dental Medicine, Yokohama 230-8501, Japan.
| | - Nobuhiro Hanada
- Department of Translational Research, Tsurumi University School of Dental Medicine, Yokohama 230-8501, Japan.
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Hu CC, Wu GH, Hua TE, Wagner OI, Yen TJ. Uptake of TiO 2 Nanoparticles into C. elegans Neurons Negatively Affects Axonal Growth and Worm Locomotion Behavior. ACS APPLIED MATERIALS & INTERFACES 2018; 10:8485-8495. [PMID: 29464946 DOI: 10.1021/acsami.7b18818] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We employ model organism Caenorhabditis elegans to effectively study the toxicology of anatase and rutile phase titanium dioxide (TiO2) nanoparticles (NPs). The experimental results show that nematode C. elegans can take up fluorescein isothiocyanate-labeled TiO2 NPs and that both anatase and rutile TiO2 NPs can be detected in the cytoplasm of cultured primary neurons imaged by transmission electron microscopy. After TiO2 NP exposure, these neurons also grow shorter axons, which may be related to the detected impeded worm locomotion behavior. Furthermore, anatase TiO2 NPs did not affect the worm's body length; however, we determined that a concentration of 500 μg/mL of anatase TiO2 NPs reduced the worm population by 50% within 72 h. Notably, rutile TiO2 NPs negatively affect both the body size and worm population. Worms unable to enter the L4 larval stage explain a severe reduction in the worm population at TiO2 NPs LC50/3d. To obtain a better understanding of the cellular mechanisms involved in TiO2 NP intoxication, DNA microarray assays were employed to determine changes in gene expression in the presence or absence of TiO2 NP exposure. Our data reveal that three genes (with significant changes in expression levels) were related to metal binding or metal detoxification (mtl-2, C45B2.2, and nhr-247), six genes were involved in fertility and reproduction (mtl-2, F26F2.3, ZK970.7, clec-70, K08C9.7, and C38C3.7), four genes were involved in worm growth and body morphogenesis (mtl-2, F26F2.3, C38C3.7, and nhr-247), and five genes were involved in neuronal function (C41G6.13, C45B2.2, srr-6, K08C9.7, and C38C3.7).
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Mostafa M, Amal-Asran, Almoammar H, Abd-Elsalam KA. Nanoantimicrobials Mechanism of Action. NANOTECHNOLOGY IN THE LIFE SCIENCES 2018:281-322. [DOI: 10.1007/978-3-319-91161-8_11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Kumar M, Das A. Emerging nanotechnology based strategies for diagnosis and therapeutics of urinary tract infections: A review. Adv Colloid Interface Sci 2017; 249:53-65. [PMID: 28668171 DOI: 10.1016/j.cis.2017.06.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 06/23/2017] [Accepted: 06/23/2017] [Indexed: 12/31/2022]
Abstract
At present, various diagnostic and therapeutic approaches are available for urinary tract infections. But, still the quest for development of more rapid, accurate and reliable approach is an unending process. The pathogens, especially uropathogens are adapting to new environments and antibiotics day by day rapidly. Therefore, urinary tract infections are evolving as hectic and difficult to eradicate, increasing the economic burden to the society. The technological advances should be able to compete the adaptability characteristics of microorganisms to combat their growth in new environments and thereby preventing their infections. Nanotechnology is at present an extensively developing area of immense scientific interest since it has diverse potential applications in biomedical field. Nanotechnology may be combined with cellular therapy approaches to overcome the limitations caused by conventional therapeutics. Nanoantibiotics and drug delivery using nanotechnology are currently growing areas of research in biomedical field. Recently, various categories of antibacterial nanoparticles and nanocarriers for drug delivery have shown their potential in the treatment of infectious diseases. Nanoparticles, compared to conventional antibiotics, are more beneficial in terms of decreasing toxicity, prevailing over resistance and lessening costs. Nanoparticles present long term therapeutic effects since they are retained in body for relatively longer periods. This review focuses on recent advances in the field of nanotechnology, principally emphasizing diagnostics and therapeutics of urinary tract infections.
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Přikrylová K, Polievková E, Drbohlavová J, Veselá M, Hubálek J. Nanostructured titania decorated with silver nanoparticles for photocatalytic water disinfection. MONATSHEFTE FUR CHEMIE 2017. [DOI: 10.1007/s00706-017-2046-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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In vitro assessment of Ag-TiO 2 /polyurethane nanocomposites for infection control using response surface methodology. REACT FUNCT POLYM 2017. [DOI: 10.1016/j.reactfunctpolym.2017.06.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Cao S, Wang Y, Cao L, Wang Y, Lin B, Lan W, Cao B. Preparation and antimicrobial assay of ceramic brackets coated with TiO2 thin films. Korean J Orthod 2016; 46:146-54. [PMID: 27226960 PMCID: PMC4879317 DOI: 10.4041/kjod.2016.46.3.146] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2015] [Revised: 07/20/2015] [Accepted: 07/28/2015] [Indexed: 11/18/2022] Open
Abstract
Objective Different methods have been utilized to prevent enamel demineralization and other complications during orthodontic treatment. However, none of these methods can offer long-lasting and effective prevention of orthodontic complications or interventions after complications occur. Considering the photocatalytic effect of TiO2 on organic compounds, we hoped to synthesize a novel bracket with a TiO2 thin film to develop a photocatalytic antimicrobial effect. Methods The sol-gel dip coating method was used to prepare TiO2 thin films on ceramic bracket surfaces. Twenty groups of samples were composed according to the experimental parameters. Crystalline structure and surface morphology were characterized by X-ray diffraction and scanning electron microscopy, respectively; film thickness was examined with a surface ellipsometer. The photocatalytic properties under ultraviolet (UV) light irradiation were analyzed by evaluating the degradation ratio of methylene blue (MB) at a certain time. Antibacterial activities of selected thin films were also tested against Lactobacillus acidophilus and Candida albicans. Results Films with 5 coating layers annealed at 700℃ showed the greatest photocatalytic activity in terms of MB decomposition under UV light irradiation. TiO2 thin films with 5 coating layers annealed at 700℃ exhibited the greatest antimicrobial activity under UV-A light irradiation. Conclusions These results provide promising guidance in prevention of demineralization by increasing antimicrobial activities of film coated brackets.
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Affiliation(s)
- Shuai Cao
- Department of Orthodontics, School of Dentistry, Lanzhou University, Lanzhou, P. R. China
| | - Ye Wang
- Department of Orthodontics, School of Dentistry, Lanzhou University, Lanzhou, P. R. China
| | - Lin Cao
- Department of Orthodontics, School of Dentistry, Lanzhou University, Lanzhou, P. R. China
| | - Yu Wang
- Department of Orthodontics, School of Dentistry, Lanzhou University, Lanzhou, P. R. China
| | - Bingpeng Lin
- Department of Orthodontics, School of Dentistry, Lanzhou University, Lanzhou, P. R. China
| | - Wei Lan
- Department of Physics, School of Physical Science and Technology, Lanzhou University, Lanzhou, P. R. China
| | - Baocheng Cao
- Department of Orthodontics, School of Dentistry, Lanzhou University, Lanzhou, P. R. China
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Constantino JA, Delgado-Rastrollo M, Pacha-Olivenza MA, González-Martín ML, Quiles M, Pérez-Giraldo C, Bruque JM, Gallardo-Moreno AM. In vivo bactericidal efficacy of the Ti6Al4V surface after ultraviolet C treatment. J Orthop Traumatol 2016; 18:59-67. [PMID: 27137674 PMCID: PMC5310995 DOI: 10.1007/s10195-016-0407-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Accepted: 04/08/2016] [Indexed: 11/30/2022] Open
Abstract
Background Biomaterial-associated infections are one of the most important complications in orthopedic surgery. The main goal of this study was to demonstrate the in vivo bactericidal effect of ultraviolet (UV) irradiation on Ti6Al4V surfaces. Materials and methods An experimental model of device-related infections was developed by direct inoculation of Staphylococcus aureus into the canal of both femurs of 34 rats. A UV-irradiated Ti6Al4V pin was press-fit into the canal by retrograde insertion in one femur and the control pin was inserted into the contralateral femur. To assess the efficacy of UV radiation, the mean colony counts after inoculation in the experimental subjects and the control group were compared at different times of sacrifice and at different inoculum doses. Results At 72 h, the mean colony counts after inoculation in experimental femurs were significantly lower than those of the control group, with a reduction percentage of 76 % (p = 0.041). A similar difference between control and experimental pins was observed at 24 h using an inoculum dose <104 colony-forming units (CFU), for which the reduction percentage was 70.48 % (p = 0.017). Conclusion The irradiated surface of Ti6Al4V is able to reduce early bacterial colonization of Ti6AlV pins located in the medullar channel and in the surrounding femur. The reductions depend on the initial inoculums used to cause infection in the animals and the greatest effects are detected for inoculums <104 CFU. Level of evidence Not applicable.
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Affiliation(s)
- Juan A Constantino
- Orthopaedic and Traumatic Service, Complejo Hospitalario Universitario de Badajoz, Avenida Tellez Lafuente s/n, 06010, Badajoz, Spain.
| | - María Delgado-Rastrollo
- Department of Biomedical Sciences, Microbiology Area, Faculty of Medicine, University of Extremadura, Avda de Elvas s/n, 06006, Badajoz, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Badajoz, Spain
| | - Miguel A Pacha-Olivenza
- Department of Applied Physics, Faculty of Science, University of Extremadura, Avda de Elvas s/n, 06006, Badajoz, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Badajoz, Spain
| | - M Luisa González-Martín
- Department of Applied Physics, Faculty of Science, University of Extremadura, Avda de Elvas s/n, 06006, Badajoz, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Badajoz, Spain
| | - Manuel Quiles
- Orthopaedic and Traumatic Service, Complejo Hospitalario Universitario de Badajoz, Avenida Tellez Lafuente s/n, 06010, Badajoz, Spain
| | - C Pérez-Giraldo
- Department of Biomedical Sciences, Microbiology Area, Faculty of Medicine, University of Extremadura, Avda de Elvas s/n, 06006, Badajoz, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Badajoz, Spain
| | - José M Bruque
- Department of Applied Physics, Faculty of Science, University of Extremadura, Avda de Elvas s/n, 06006, Badajoz, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Badajoz, Spain
| | - Amparo M Gallardo-Moreno
- Department of Applied Physics, Faculty of Science, University of Extremadura, Avda de Elvas s/n, 06006, Badajoz, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Badajoz, Spain
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Sodagar A, Khalil S, Kassaee MZ, Shahroudi AS, Pourakbari B, Bahador A. Antimicrobial properties of poly (methyl methacrylate) acrylic resins incorporated with silicon dioxide and titanium dioxide nanoparticles on cariogenic bacteria. J Orthod Sci 2016; 5:7-13. [PMID: 26998471 PMCID: PMC4778177 DOI: 10.4103/2278-0203.176652] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
AIM To assess the effects of adding nano-titanium dioxide (nano-TiO2) and nano-silicon dioxide (nano-SiO2) and their mixture to poly (methyl methacrylate) (PMMA) to induce antimicrobial activity in acrylic resins. MATERIALS AND METHODS Acrylic specimens in size of 20 mm × 20 mm × 1 mm of 0.5% and 1% of nano-TiO2 (21 nm) and nano-SiO2 (20 nm) and their mixture (TiO2/SiO2 nanoparticles) (1:1 w/w) were prepared from the mixture of acrylic liquid containing nanoparticles and acrylic powder. To obtain 0.5% and 1% concentration, 0.02 g and 0.04 g of the nanoparticles was added to each milliliter of the acrylic monomer, respectively. Antimicrobial properties of six specimens of these preparations, as prepared, were assessed against planktonic Lactobacillus acidophilus and Streptococcus mutans at 0, 15, 30, 45, 60, 75, and 90 min follow-up by broth dilution assay. The specimens of each group were divided into three subgroups: Dark, daylight, or ultraviolet A (UVA). The percent of bacterial reduction is found out from the counts taken at each time point. STATISTICAL ANALYSIS Data were analyzed using one-way analysis of variance and Tukey's post hoc analysis. RESULTS Exposure to PMMA containing the nanoparticles reduced the bacterial count by 3.2-99%, depending on the nanoparticles, bacterial types, and light conditions. Planktonic cultures of S. mutans and L. acidophilus exposed to PMMA containing 1% of TiO2/SiO2 nanoparticles showed a significant decrease (P < 0.001) (98% and 99%, respectively) in a time-dependent manner under UVA. The S. mutans and L. acidophilus counts did not significantly decrease in PMMA containing 0.5% nano-TiO2 and PMMA containing 0.5% nano-SiO2 in the dark. No statistically significant reduction (P > 0.05) was observed in the counts of S. mutans and L. acidophilus in PMMA without the nanoparticles exposed to UVA. CONCLUSIONS PMMA resins incorporated with TiO2/SiO2 nanoparticles showed strong antimicrobial activity against the cariogenic bacteria.
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Affiliation(s)
- Ahmad Sodagar
- Department of Orthodontics, Faculty of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Soufia Khalil
- Department of Orthodontics, Faculty of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Atefe Saffar Shahroudi
- Department of Orthodontics, Faculty of Dentistry, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Babak Pourakbari
- Pediatrics Infectious Disease Research Center, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Abbas Bahador
- Department of Microbiology, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Veerachamy S, Yarlagadda T, Manivasagam G, Yarlagadda PK. Bacterial adherence and biofilm formation on medical implants: a review. Proc Inst Mech Eng H 2015; 228:1083-99. [PMID: 25406229 DOI: 10.1177/0954411914556137] [Citation(s) in RCA: 278] [Impact Index Per Article: 30.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Biofilms are a complex group of microbial cells that adhere to the exopolysaccharide matrix present on the surface of medical devices. Biofilm-associated infections in the medical devices pose a serious problem to the public health and adversely affect the function of the device. Medical implants used in oral and orthopedic surgery are fabricated using alloys such as stainless steel and titanium. The biological behavior, such as osseointegration and its antibacterial activity, essentially depends on both the chemical composition and the morphology of the surface of the device. Surface treatment of medical implants by various physical and chemical techniques are attempted in order to improve their surface properties so as to facilitate bio-integration and prevent bacterial adhesion. The potential source of infection of the surrounding tissue and antimicrobial strategies are from bacteria adherent to or in a biofilm on the implant which should prevent both biofilm formation and tissue colonization. This article provides an overview of bacterial biofilm formation and methods adopted for the inhibition of bacterial adhesion on medical implants.
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Affiliation(s)
- Suganthan Veerachamy
- Department of Biomedical Engineering, School of Biosciences and Technology, VIT University, Vellore, India
| | | | - Geetha Manivasagam
- Centre for Biomaterials Science and Technology, School of Mechanical and Building Sciences, VIT University, Vellore, India
| | - Prasad Kdv Yarlagadda
- School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, Brisbane, QLD, Australia
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Antibacterial property of Ag nanoparticle-impregnated N-doped titania films under visible light. Sci Rep 2015; 5:11978. [PMID: 26156001 PMCID: PMC4496671 DOI: 10.1038/srep11978] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 06/12/2015] [Indexed: 11/24/2022] Open
Abstract
Photocatalysts produce free radicals upon receiving light energy; thus, they possess antibacterial properties. Silver (Ag) is an antibacterial material that disrupts bacterial physiology. Our previous study reported that the high antibacterial property of silver nanoparticles on the surfaces of visible light-responsive nitrogen-doped TiO2 photocatalysts [TiO2(N)] could be further enhanced by visible light illumination. However, the major limitation of this Ag-TiO2 composite material is its durability; the antibacterial property decreased markedly after repeated use. To overcome this limitation, we developed TiO2(N)/Ag/TiO2(N) sandwich films in which the silver is embedded between two TiO2(N) layers. Various characteristics, including silver and nitrogen amounts, were examined in the composite materials. Various analyses, including electron microscopy, energy dispersive spectroscopy, X-ray diffraction, and ultraviolet–visible absorption spectrum and methylene blue degradation rate analyses, were performed. The antibacterial properties of the composite materials were investigated. Here we revealed that the antibacterial durability of these thin films is substantially improved in both the dark and visible light, by which bacteria, such as Escherichia coli, Streptococcus pyogenes, Staphylococcus aureus, and Acinetobacter baumannii, could be efficiently eliminated. This study demonstrated a feasible approach to improve the visible-light responsiveness and durability of antibacterial materials that contain silver nanoparticles impregnated in TiO2(N) films.
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Saengmee-Anupharb S, Srikhirin T, Thaweboon B, Thaweboon S, Amornsakchai T, Dechkunakorn S, Suddhasthira T. Antimicrobial effects of silver zeolite, silver zirconium phosphate silicate and silver zirconium phosphate against oral microorganisms. Asian Pac J Trop Biomed 2015; 3:47-52. [PMID: 23570016 DOI: 10.1016/s2221-1691(13)60022-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2012] [Accepted: 12/12/2012] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To evaluate the antimicrobial activities of silver inorganic materials, including silver zeolite (AgZ), silver zirconium phosphate silicate (AgZrPSi) and silver zirconium phosphate (AgZrP), against oral microorganisms. In line with this objective, the morphology and structure of each type of silver based powders were also investigated. METHODS The antimicrobial activities of AgZ, AgZrPSi and AgZrP were tested against Streptococcus mutans, Lactobacillus casei, Candida albicans and Staphylococcus aureus using disk diffusion assay as a screening test. The minimum inhibitory concentration (MIC) and minimum lethal concentration (MLC) were determined using the modified membrane method. Scanning electron microscope and X-ray diffraction were used to investigate the morphology and structure of these silver materials. RESULTS All forms of silver inorganic materials could inhibit the growth of all test microorganisms. The MIC of AgZ, AgZrPSi and AgZrP was 10.0 g/L whereas MLC ranged between 10.0-60.0 g/L. In terms of morphology and structure, AgZrPSi and AgZrP had smaller sized particles (1.5-3.0 µm) and more uniformly shaped than AgZ. CONCLUSIONS Silver inorganic materials in the form of AgZ, AgZrPSi and AgZrP had antimicrobial effects against all test oral microorganisms and those activities may be influenced by the crystal structure of carriers. These results suggest that these silver materials may be useful metals applied to oral hygiene products to provide antimicrobial activity against oral infection.
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Bonnet M, Massard C, Veisseire P, Camares O, Awitor KO. Environmental Toxicity and Antimicrobial Efficiency of Titanium Dioxide Nanoparticles in Suspension. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/jbnb.2015.63020] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Nakajo K, Takahashi M, Kikuchi M, Takada Y, Okuno O, Sasaki K, Takahashi N. Inhibitory effect of Ti-Ag alloy on artificial biofilm formation. Dent Mater J 2014; 33:389-93. [PMID: 24786344 DOI: 10.4012/dmj.2013-334] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Titanium-silver (Ti-Ag) alloy has been improved for machinability and mechanical properties, but its anti-biofilm properties have not been elucidated yet. Thus, this study aimed to evaluate the effects of Ti-Ag alloy on biofilm formation and bacterial viability in comparison with pure Ti, pure Ag and silver-palladium (Ag-Pd) alloy. Biofilm formation on the metal plates was evaluated by growing Streptococcus mutans and Streptococcus sobrinus in the presence of metal plates. Bactericidal activity was evaluated using a film contact method. There were no significant differences in biofilm formation between pure Ti, pure Ag and Ag-Pd alloy, while biofilm amounts on Ti-20% Ag and Ti-25% Ag alloys were significantly lower (p<0.05). In addition, Ti-Ag alloys and pure Ti were not bactericidal, although pure Ag and Ag-Pd alloy killed bacteria. These results suggest that Ti-20% Ag and Ti-25% Ag alloys are suitable for dental material that suppresses biofilm formation without disturbing healthy oral microflora.
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Affiliation(s)
- Kazuko Nakajo
- Division of Oral Ecology and Biochemistry, Tohoku University Graduate School of Dentistry
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Fabrication of Metal Oxide–Polymer Hybrid Nanocomposites. ORGANIC-INORGANIC HYBRID NANOMATERIALS 2014. [DOI: 10.1007/12_2014_285] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Surface modification of inorganic nanoparticles for development of organic–inorganic nanocomposites—A review. Prog Polym Sci 2013. [DOI: 10.1016/j.progpolymsci.2013.02.003] [Citation(s) in RCA: 1475] [Impact Index Per Article: 134.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Sodagar A, Bahador A, Khalil S, Shahroudi AS, Kassaee MZ. The effect of TiO2 and SiO2 nanoparticles on flexural strength of poly (methyl methacrylate) acrylic resins. J Prosthodont Res 2012. [PMID: 23200530 DOI: 10.1016/j.jpor.2012.05.001] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE TiO(2) and SiO(2) nanoparticles are products of nanotechnology which have been incorporated to acrylic resins (AR) in order to induce antimicrobial properties. However, as additives they can affect the mechanical properties of the final product. The aim of this study was to survey the effects of TiO(2) and SiO(2) nanoparticles on flexural strength (Fs) of poly (methyl methacrylate) acrylic resins. METHODS Acrylic specimens (Selecta Plus) in size of 5×10 (±0.2)×3.3 (±0.2)mm were prepared and divided into 7 groups: AR containing nanoTiO(2), SiO(2) and TiO(2) with SiO(2) in two concentration of 1% and 0.5%, in addition to a control group. To prepare nano AR, nanoparticles were added to the monomer. All specimens were stored in 37°C distilled water and underwent Fs test by universal testing machine (Zwick). RESULTS The maximum mean flexural strength (43.5 MPa) belongs to the control group and AR containing 0.5% of both TiO(2) and SiO(2) demonstrated the minimum mean Fs (30.1 MPa). Resins contained TiO(2), demonstrated lower values of Fs than those contained SiO(2) with the same concentration, but the differences were not significant (P>0.05). CONCLUSION Incorporation of TiO(2) and SiO(2) nanoparticles into acrylic resins can adversely affect the flexural strength of the final products, and this effect is directly correlated with the concentration of nanoparticles.
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Affiliation(s)
- Ahmad Sodagar
- Department of Orthodontics, Faculty of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
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Photocatalytic and antimicrobial properties of surgical implant coatings of titanium dioxide deposited though cathodic arc evaporation. Biotechnol Lett 2012; 34:2299-305. [PMID: 22941372 DOI: 10.1007/s10529-012-1040-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Accepted: 08/14/2012] [Indexed: 10/27/2022]
Abstract
UNLABELLED Nanostructured crystalline titanium dioxide coatings deposited by cathodic arc evaporated on titanium grade five medical implant substrates were demonstrated to exhibit UV-induced photocatalytic activity that can be utilized to provide bactericidal effects against Staphylococcus epidermidis. The photocatalytic activity of the coatings was confirmed via degradation of Rhodamine B under UV illumination. A 90 % reduction of viable bacteria was achieved in a clinically suitable time of only 2 min with a UV dose of 2.4 J delivered at 365 nm. These results are encouraging for the development of antimicrobial surfaces in orthopedics and dentistry in order to prevent or treat post-surgical infections. PURPOSE OF WORK To assess the possibility of employing photocatalysis for elimination of S. epidermidis, known to cause medical device related infections, under short enough times to be clinically useful on an implant surface produced with a technique that is suitable for mass production.
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Titanium Oxide Antibacterial Surfaces in Biomedical Devices. Int J Artif Organs 2011; 34:929-46. [DOI: 10.5301/ijao.5000050] [Citation(s) in RCA: 184] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/31/2011] [Indexed: 02/07/2023]
Abstract
Titanium oxide is a heterogeneous catalyst whose efficient photoinduced activity, related to some of its allotropic forms, paved the way for its widespread technological use. Here, we offer a comparative analysis of the use of titanium oxide as coating for materials in biomedical devices. First, we introduce the photoinduced catalytic mechanisms of TiO2 and their action on biological environment and bacteria. Second, we overview the main physical and chemical technologies for structuring suitable TiO2 coatings on biomedical devices. We then present the approaches for in vitro characterization of these surfaces. Finally, we discuss the main aspects of TiO2 photoactivated antimicrobial activity on medical devices and limitations for these types of applications.
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"Nanoantibiotics": a new paradigm for treating infectious diseases using nanomaterials in the antibiotics resistant era. J Control Release 2011; 156:128-45. [PMID: 21763369 DOI: 10.1016/j.jconrel.2011.07.002] [Citation(s) in RCA: 1030] [Impact Index Per Article: 79.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2011] [Accepted: 06/29/2011] [Indexed: 11/23/2022]
Abstract
Despite the fact that we live in an era of advanced and innovative technologies for elucidating underlying mechanisms of diseases and molecularly designing new drugs, infectious diseases continue to be one of the greatest health challenges worldwide. The main drawbacks for conventional antimicrobial agents are the development of multiple drug resistance and adverse side effects. Drug resistance enforces high dose administration of antibiotics, often generating intolerable toxicity, development of new antibiotics, and requests for significant economic, labor, and time investments. Recently, nontraditional antibiotic agents have been of tremendous interest in overcoming resistance that is developed by several pathogenic microorganisms against most of the commonly used antibiotics. Especially, several classes of antimicrobial nanoparticles (NPs) and nanosized carriers for antibiotics delivery have proven their effectiveness for treating infectious diseases, including antibiotics resistant ones, in vitro as well as in animal models. This review summarizes emerging efforts in combating against infectious diseases, particularly using antimicrobial NPs and antibiotics delivery systems as new tools to tackle the current challenges in treating infectious diseases.
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Foster HA, Ditta IB, Varghese S, Steele A. Photocatalytic disinfection using titanium dioxide: spectrum and mechanism of antimicrobial activity. Appl Microbiol Biotechnol 2011; 90:1847-68. [PMID: 21523480 PMCID: PMC7079867 DOI: 10.1007/s00253-011-3213-7] [Citation(s) in RCA: 488] [Impact Index Per Article: 37.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2011] [Accepted: 02/12/2011] [Indexed: 11/30/2022]
Abstract
The photocatalytic properties of titanium dioxide are well known and have many applications including the removal of organic contaminants and production of self-cleaning glass. There is an increasing interest in the application of the photocatalytic properties of TiO(2) for disinfection of surfaces, air and water. Reviews of the applications of photocatalysis in disinfection (Gamage and Zhang 2010; Chong et al., Wat Res 44(10):2997-3027, 2010) and of modelling of TiO(2) action have recently been published (Dalrymple et al. , Appl Catal B 98(1-2):27-38, 2010). In this review, we give an overview of the effects of photoactivated TiO(2) on microorganisms. The activity has been shown to be capable of killing a wide range of Gram-negative and Gram-positive bacteria, filamentous and unicellular fungi, algae, protozoa, mammalian viruses and bacteriophage. Resting stages, particularly bacterial endospores, fungal spores and protozoan cysts, are generally more resistant than the vegetative forms, possibly due to the increased cell wall thickness. The killing mechanism involves degradation of the cell wall and cytoplasmic membrane due to the production of reactive oxygen species such as hydroxyl radicals and hydrogen peroxide. This initially leads to leakage of cellular contents then cell lysis and may be followed by complete mineralisation of the organism. Killing is most efficient when there is close contact between the organisms and the TiO(2) catalyst. The killing activity is enhanced by the presence of other antimicrobial agents such as Cu and Ag.
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Affiliation(s)
- Howard A Foster
- Centre for Parasitology and Disease Research, School of Environment and Life Sciences, University of Salford, The Crescent, Salford, Greater Manchester, UK.
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Messaoud M, Chadeau E, Brunon C, Ballet T, Rappenne L, Roussel F, Leonard D, Oulahal N, Langlet M. Photocatalytic generation of silver nanoparticles and application to the antibacterial functionalization of textile fabrics. J Photochem Photobiol A Chem 2010. [DOI: 10.1016/j.jphotochem.2010.08.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Wu P, Imlay JA, Shang JK. Mechanism of Escherichia coli inactivation on palladium-modified nitrogen-doped titanium dioxide. Biomaterials 2010; 31:7526-33. [PMID: 20637502 DOI: 10.1016/j.biomaterials.2010.06.032] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2010] [Accepted: 06/23/2010] [Indexed: 10/19/2022]
Abstract
The cellular responses of Escherichia coli to visible light photocatalysis were characterized by chemical, optical, electron-beam, and surface-force techniques, to elucidate the mechanisms of photocatalytic inactivation of E. coli on PdO/TiON fiber. The characterization techniques included chemical assays, fluorescence microscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM). Fluorescence microscopy using the Live/Dead BacLight kit indicates that the photocatalytic treatment resulted in severe membrane damage to the E. coli cells. SEM, AFM and TEM revealed drastic defects in the morphology and internal sub-structure of the bacterial cells after the treatments. Combining data from our previous reports on the antimicrobial properties of visible-light-activated PdO/TiON photocatalyst, the present results point to oxidative attack from the exterior to the interior of the bacteria by hydroxyl radicals as the primary mechanism of photocatalytic inactivation.
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Affiliation(s)
- Pinggui Wu
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
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Wong MS, Sun DS, Chang HH. Bactericidal performance of visible-light responsive titania photocatalyst with silver nanostructures. PLoS One 2010; 5:e10394. [PMID: 20454454 PMCID: PMC2861596 DOI: 10.1371/journal.pone.0010394] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2010] [Accepted: 04/06/2010] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Titania dioxide (TiO(2)) photocatalyst is primarily induced by ultraviolet light irradiation. Visible-light responsive anion-doped TiO(2) photocatalysts contain higher quantum efficiency under sunlight and can be used safely in indoor settings without exposing to biohazardous ultraviolet light. The antibacterial efficiency, however, remains to be further improved. METHODOLOGY/PRINCIPAL FINDINGS Using thermal reduction method, here we synthesized silver-nanostructures coated TiO(2) thin films that contain a high visible-light responsive antibacterial property. Among our tested titania substrates including TiO(2), carbon-doped TiO(2) [TiO(2) (C)] and nitrogen-doped TiO(2) [TiO(2) (N)], TiO(2) (N) showed the best performance after silver coating. The synergistic antibacterial effect results approximately 5 log reductions of surviving bacteria of Escherichia coli, Streptococcus pyogenes, Staphylococcus aureus and Acinetobacter baumannii. Scanning electron microscope analysis indicated that crystalline silver formed unique wire-like nanostructures on TiO(2) (N) substrates, while formed relatively straight and thicker rod-shaped precipitates on the other two titania materials. CONCLUSION/SIGNIFICANCE Our results suggested that proper forms of silver on various titania materials could further influence the bactericidal property.
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Affiliation(s)
- Ming-Show Wong
- Department of Materials Science and Engineering, National Dong-Hwa University, Hualien, Taiwan
- Nanotechnology Research Center, National Dong-Hwa University, Hualien, Taiwan
| | - Der-Shan Sun
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien, Taiwan, Republic of China
| | - Hsin-Hou Chang
- Nanotechnology Research Center, National Dong-Hwa University, Hualien, Taiwan
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien, Taiwan, Republic of China
- Tzu-Chi University Center for Vascular Medicine, Tzu-Chi University, Hualien, Taiwan, Republic of China
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Gallardo-Moreno AM, Pacha-Olivenza MA, Fernández-Calderón MC, Pérez-Giraldo C, Bruque JM, González-Martín ML. Bactericidal behaviour of Ti6Al4V surfaces after exposure to UV-C light. Biomaterials 2010; 31:5159-68. [PMID: 20362330 DOI: 10.1016/j.biomaterials.2010.03.005] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2010] [Accepted: 03/03/2010] [Indexed: 11/28/2022]
Abstract
TiO(2)-coated biomaterials that have been excited with UV irradiation have demonstrated biocidal properties in environmental applications, including drinking water decontamination. However, this procedure has not been successfully applied towards the killing of pathogens on medical titanium-based implants, mainly because of practical concerns related to irradiating the inserted biomaterial in situ. Previous researchers assumed that the photocatalysis on the TiO(2) surface during UV application causes the bactericidal effects. However, we show that a residual post-irradiation bactericidal effect exists on the surface of Ti6Al4V, not related with photocatalysis. Using a combination of staining, serial dilutions, and a biofilm assay, we show a significant and time-dependent loss in viability of different bacterial strains of Staphylococcus epidermidis and Staphylococcus aureus on the post-irradiated surface. Although the duration of this antimicrobial effect depends on the strains selected, our experiments suggest that the effect lasts at least 60 min after surface irradiation. The origin of such phenomena is discussed in terms of the physical properties of the irradiated surfaces, which include the emission of energy and changes in surfaces charge occurring during electron-hole recombination processes. The method here proposed for the preparation of antimicrobial titanium surfaces could become especially useful in total implant surgery for which the antimicrobial challenge is mainly during or shortly after surgery.
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Affiliation(s)
- Amparo M Gallardo-Moreno
- Departamento de Física Aplicada, Facultad de Ciencias, Universidad de Extremadura, Avda de Elvas s/n, 06071 Badajoz, Spain
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Necula BS, Fratila-Apachitei LE, Zaat SA, Apachitei I, Duszczyk J. In vitro antibacterial activity of porous TiO2-Ag composite layers against methicillin-resistant Staphylococcus aureus. Acta Biomater 2009; 5:3573-80. [PMID: 19454327 DOI: 10.1016/j.actbio.2009.05.010] [Citation(s) in RCA: 158] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2009] [Revised: 04/17/2009] [Accepted: 05/11/2009] [Indexed: 10/20/2022]
Abstract
The aim of this study was the synthesis of a porous TiO(2)-Ag composite coating and assessment of its in vitro bactericidal activity against methicillin-resistant Staphylococcus aureus. The coating was produced by plasma electrolytic oxidation of Ti-6Al-7Nb medical alloy in a calcium acetate/calcium glycerophosphate electrolyte bearing Ag nanoparticles. Following oxidation, the surface of the titanium substrate was converted into the corresponding oxide (TiO(2)) bearing Ca and P species from the electrolyte. In addition, Ag was detected associated with particles present in the oxide layers. The coatings revealed a porous interconnected structure with pores up to 3 microm in size, a threefold increase in roughness and improved wettability relative to the non-oxidized specimens. The composite TiO(2)-Ag coating showed complete killing of methicillin-resistant S. aureus within 24h in all culture conditions, whereas a 1000-fold increase in bacterial numbers was recorded with the ground titanium specimens and the samples oxidized in the absence of Ag nanoparticles.
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Choi JY, Chung CJ, Oh KT, Choi YJ, Kim KH. Photocatalytic Antibacterial Effect of TiO2 Film of TiAg on Streptococcus mutans. Angle Orthod 2009; 79:528-32. [DOI: 10.2319/012108-169.1] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2008] [Accepted: 05/01/2008] [Indexed: 11/23/2022] Open
Abstract
Abstract
Objective: To test through various oxidation procedures the differences in antibacterial activities against Streptococcus mutans (S mutans) of Titanium (Ti) and Titanium silver (TiAg) metals coated with TiO2.
Materials and Methods: This study examined the photocatalytic antibacterial effects on S mutans of Ti and TiAg ubstrates coated with two crystalline forms of TiO2 by thermal and anodic oxidation. A bacterial suspension of S mutans was pipetted onto TiO2-coated metal specimens and uncoated specimens with ultraviolet A (UVA) illumination for 20 to 100 minutes. The same specimen without UVA was used as the control. The level of colony-forming units of S mutans after UVA illumination was compared with that of the control.
Results: The level of colony-forming units of S mutans was significantly lower on TiO2-coated Ti and TiAg metal specimens after UVA illumination than on uncoated Ti and TiAg specimens. The level of colony-forming units of S mutans was significantly lower on the metals coated by anodic oxidation than on those coated by thermal oxidation. The TiO2 coating on TiAg had a significantly higher and more rapid antibacterial effect than did the TiO2 coating on Ti.
Conclusions: The antibacterial effect of a TiO2 film formed by anodic oxidation was superior to that formed by thermal oxidation. The addition of Ag to the Ti specimen indicated a synergistic effect on the photocatalytic antibacterial property against S mutans.
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Affiliation(s)
| | - Chooryung Judi Chung
- b Assistant Professor, Department of Orthodontics, Yongdong Severance Dental Hospital, College of Dentistry, Institute of Craniofacial Deformity, Oral Science Research Center, Yonsei University, Seoul, South Korea
| | | | - Yoon-Jeong Choi
- d Lecturer, Department of Orthodontics, Yongdong Severance Dental Hospital, College of Dentistry, Institute of Craniofacial Deformity, Oral Science Research Center, Yonsei University, Seoul, South Korea
| | - Kyung-Ho Kim
- e Professor, Department of Orthodontics, Yongdong Severance Dental Hospital, College of Dentistry, Institute of Craniofacial Deformity, Oral Science Research Center, Yonsei University, Seoul, South Korea
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Norowski PA, Bumgardner JD. Biomaterial and antibiotic strategies for peri-implantitis: a review. J Biomed Mater Res B Appl Biomater 2009; 88:530-43. [PMID: 18698626 DOI: 10.1002/jbm.b.31152] [Citation(s) in RCA: 195] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Dental implants have 89% plus survival rates at 10-15 years, but peri-implantitis or dental implant infections may be as high as 14%. Peri-implantitis can limit clinical success and impose health and financial burdens to patients and health providers. The pathogenic species associated with periodontitis (e.g., Fusobacterium ssp, A. actinomycetemcomitans, P. gingivalis) are also associated with peri-implantitis. Incidence of peri-implantitis is highest within the first 12 months after implantation, and is higher in patients who smoke or have poor oral health as well as with calcium-phosphate-coated or surface-roughened implants. Biomaterial therapies using fibers, gels, and beads to deliver antibiotics have been used in the treatment of Peri-implantitis though clinical efficacy is not well documented. Guided tissue regeneration membranes (e.g., collagen, poly-lactic/glycolic acid, chitosan, ePTFE) loaded with antimicrobials have shown success in reosseointegrating infected implants in animal models but have not been proven in humans. Experimental approaches include the development of anti-bioadhesion coatings, coating surfaces with antimicrobial agents (e.g., vancomycin, Ag, Zn) or antimicrobial releasing coatings (e.g., calcium phosphate, polylactic acid, chitosan). Future strategies include the development of surfaces that become antibacterial in response to infection, and improvements in the permucosal seal. Research is still needed to identify strategies to prevent bacterial attachment and enhance normal cell/tissue attachment to implant surfaces.
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Affiliation(s)
- P Andrew Norowski
- Biomedical Engineering Department, Herff College of Engineering, University of Memphis and Joint Biomedical Engineering Program, University of Memphis - University of Tennessee Health Science Center, Memphis, Tennessee, USA.
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Oka Y, Kim W, Yoshida T, Hirashima T, Mouri H, Urade H, Itoh Y, Kubo T. Efficacy of titanium dioxide photocatalyst for inhibition of bacterial colonization on percutaneous implants. J Biomed Mater Res B Appl Biomater 2008; 86:530-40. [DOI: 10.1002/jbm.b.31053] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Abstract
We learned from Ron Estabrook to consider the complexity of the cytochrome P450 system and to appreciate insights coming from other fields. Two issues from different fields are comparatively discussed which both have formally in common to reflect the response of the human body on foreign compounds and materials. The former ones are environmental pollutants and drugs, while the latter are solid materials such as titanium, used for orthopedic implants. It will be reviewed that both show rich oxygen chemistry as catalysts and are involved in complex biochemical responses at different regulatory levels in foreign body reactions.
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Affiliation(s)
- Christiane Jung
- Max-Delbrück-Center for Molecular Medicine, Berlin, Germany.
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