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Gu J, An Q, Huang MC, Ge P, Xue CH. Self-Cleaning Antibacterial Composite Coating of Fluorinated Acrylic Resin and Ag/SiO 2 Nanoparticles with Quaternary Ammonium. Polymers (Basel) 2024; 16:1885. [PMID: 39000741 PMCID: PMC11244108 DOI: 10.3390/polym16131885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 06/13/2024] [Accepted: 06/25/2024] [Indexed: 07/17/2024] Open
Abstract
With improvements in living standards, the demand for antibacterial self-cleaning coatings has significantly increased. In this work, self-cleaning coatings with antibacterial properties were fabricated by spray-coating a composite of fluorinated acrylic resin and Ag/SiO2 nanoparticles with quaternary ammonium salts. The synergistic action of the quaternary ammonium salts and silver nanostructures caused the coating to show a dual antibacterial effect. The Ag/SiO2 nanoparticles roughened the coating's surface and, in combination with the fluorinated chains, provided the surface a superhydrophobic self-cleaning property with a contact angle of 156° and a sliding angle of less than 2°. Notably, the composite coating withstood 100 abrasion cycles without losing its superhydrophobicity and the contact angle is still exceeded 150° after 60 h of immersion solutions with different pH values, demonstrating outstanding wear resistance and acid/alkali stability. The incorporation of nanostructured antibacterial agents was effective in improving the roughness and antibacterial properties of the low-surface-energy resin, resulting in a self-cleaning antibacterial composite coating. This method may pave a new route for the design of functional coating materials with excellent overall performance.
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Affiliation(s)
- Jiangdong Gu
- College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Qiufeng An
- College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Meng-Chen Huang
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Ping Ge
- College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Chao-Hua Xue
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
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Wu N, Gao H, Wang X, Pei X. Surface Modification of Titanium Implants by Metal Ions and Nanoparticles for Biomedical Application. ACS Biomater Sci Eng 2023; 9:2970-2990. [PMID: 37184344 DOI: 10.1021/acsbiomaterials.2c00722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Implant surface modification can improve osseointegration and reduce peri-implant inflammation. Implant surfaces are modified with metals because of their excellent mechanical properties and significant functions. Metal surface modification is divided into metal ions and nanoparticle surface modification. These two methods function by adding a finishing metal to the surface of the implant, and both play a role in promoting osteogenic, angiogenic, and antibacterial properties. Based on this, the nanostructural surface changes confer stronger antibacterial and cellular affinity to the implant surface. The current paper reviews the forms, mechanisms, and applications of nanoparticles and metal ion modifications to provide a foundation for the surface modification of implants.
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Affiliation(s)
- Nan Wu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, China
| | - Hongyu Gao
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, China
| | - Xu Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, China
| | - Xibo Pei
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, China
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Clynch AL, Norrington M, Mustafa MA, Richardson GE, Doherty JA, Humphries TJ, Gillespie CS, Keshwara SM, McMahon CJ, Islim AI, Jenkinson MD, P Millward C, Brodbelt AR. Cranial meningioma with bone involvement: surgical strategies and clinical considerations. Acta Neurochir (Wien) 2023; 165:1355-1363. [PMID: 36877330 PMCID: PMC10140130 DOI: 10.1007/s00701-023-05535-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 02/11/2023] [Indexed: 03/07/2023]
Abstract
BACKGROUND Intracranial meningioma with bone involvement and primary intraosseous meningioma is uncommon. There is currently no consensus for optimal management. This study aimed to describe the management strategy and outcomes for a 10-year illustrative cohort, and propose an algorithm to aid clinicians in selecting cranioplasty material in such patients. METHODS A single-centre, retrospective cohort study (January 2010-August 2021). All adult patients requiring cranial reconstruction due to meningioma with bone involvement or primary intraosseous meningioma were included. Baseline patient and meningioma characteristics, surgical strategy, and surgical morbidity were examined. Descriptive statistics were performed using SPSS v24.0. Data visualisation was performed using R v4.1.0. RESULTS Thirty-three patients were identified (mean age 56 years; SD 15) There were 19 females. Twenty-nine patients had secondary bone involvement (88%). Four had primary intraosseous meningioma (12%). Nineteen had gross total resection (GTR; 58%). Thirty had primary 'on-table' cranioplasty (91%). Cranioplasty materials included pre-fabricated polymethyl methacrylate (pPMMA) (n = 12; 36%), titanium mesh (n = 10; 30%), hand-moulded polymethyl methacrylate cement (hPMMA) (n = 4; 12%), pre-fabricated titanium plate (n = 4; 12%), hydroxyapatite (n = 2; 6%), and a single case combining titanium mesh with hPMMA cement (n = 1; 3%). Five patients required reoperation for a postoperative complication (15%). CONCLUSION Meningioma with bone involvement and primary intraosseous meningioma often requires cranial reconstruction, but this may not be evident prior to surgical resection. Our experience demonstrates that a wide variety of materials have been used successfully, but that pre-fabricated materials may be associated with fewer postoperative complications. Further research within this population is warranted to identify the most appropriate operative strategy.
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Affiliation(s)
- Abigail L Clynch
- School of Medicine, University of Liverpool, Brownlow Hill, Liverpool, L69 7ZX, UK.
| | - Max Norrington
- The Walton Centre NHS Foundation Trust, Lower Lane, Fazakerley, L9 7LJ, Liverpool, UK
| | - Mohammad A Mustafa
- School of Medicine, University of Liverpool, Brownlow Hill, Liverpool, L69 7ZX, UK
| | - George E Richardson
- School of Medicine, University of Liverpool, Brownlow Hill, Liverpool, L69 7ZX, UK
| | - John A Doherty
- The Walton Centre NHS Foundation Trust, Lower Lane, Fazakerley, L9 7LJ, Liverpool, UK
| | - Thomas J Humphries
- The Walton Centre NHS Foundation Trust, Lower Lane, Fazakerley, L9 7LJ, Liverpool, UK
| | - Conor S Gillespie
- School of Medicine, University of Liverpool, Brownlow Hill, Liverpool, L69 7ZX, UK
| | - Sumirat M Keshwara
- School of Medicine, University of Liverpool, Brownlow Hill, Liverpool, L69 7ZX, UK
| | - Catherine J McMahon
- The Walton Centre NHS Foundation Trust, Lower Lane, Fazakerley, L9 7LJ, Liverpool, UK
| | - Abdurrahman I Islim
- The Walton Centre NHS Foundation Trust, Lower Lane, Fazakerley, L9 7LJ, Liverpool, UK.,Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Brownlow Hill, Liverpool, L69 7ZX, UK
| | - Michael D Jenkinson
- The Walton Centre NHS Foundation Trust, Lower Lane, Fazakerley, L9 7LJ, Liverpool, UK.,Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Brownlow Hill, Liverpool, L69 7ZX, UK
| | - Christopher P Millward
- The Walton Centre NHS Foundation Trust, Lower Lane, Fazakerley, L9 7LJ, Liverpool, UK.,Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Brownlow Hill, Liverpool, L69 7ZX, UK
| | - Andrew R Brodbelt
- School of Medicine, University of Liverpool, Brownlow Hill, Liverpool, L69 7ZX, UK.,The Walton Centre NHS Foundation Trust, Lower Lane, Fazakerley, L9 7LJ, Liverpool, UK
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Substituted Hydroxyapatite, Glass, and Glass-Ceramic Thin Films Deposited by Nanosecond Pulsed Laser Deposition (PLD) for Biomedical Applications: A Systematic Review. COATINGS 2021. [DOI: 10.3390/coatings11070811] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The deposition of thin films of bioactive materials is the most common approach to improve the bone bonding ability of an implant surface. With this purpose, several wet and plasma assisted deposition methods were proposed in the scientific literature. In this review, we considered films obtained by nanosecond Pulsed Laser Deposition (PLD). Since hydroxyapatite (HA) has composition and structure similar to that of the mineral component of the bone, the initial studies focused on the selection of experimental conditions that would allow the deposition of films that retain HA stoichiometry and crystallinity. However, biological apatite was found to be a poorly crystalline and multi-substituted mineral; consequently, the attention of researchers was oriented towards the deposition of substituted HA, glass (BG), and glass-ceramic (BGC) bioactive materials to exploit the biological relevance of foreign ions and crystallinity. In this work, after a description of the nanosecond ablation and film growth of ceramic materials, we reported studies on the mechanism of HA ablation and deposition, evidencing the peculiarities of PLD. The literature concerning the PLD of ion substituted HA, BG, and BGC was then reviewed and the performances of the coatings were discussed. We concluded by describing the advantages, limitations, and perspectives of PLD for biomedical applications.
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Antibacterial Optimization of Highly Deformed Titanium Alloys for Spinal Implants. Molecules 2021; 26:molecules26113145. [PMID: 34074062 PMCID: PMC8197332 DOI: 10.3390/molecules26113145] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 05/19/2021] [Accepted: 05/20/2021] [Indexed: 12/31/2022] Open
Abstract
The goal of the work was to develop materials dedicated to spine surgery that minimized the potential for infection originating from the transfer of bacteria during long surgeries. The bacteria form biofilms, causing implant loosening, pain and finally, a risk of paralysis for patients. Our strategy focused both on improvement of antibacterial properties against bacteria adhesion and on wear and corrosion resistance of tools for spine surgery. Further, a ~35% decrease in implant and tool dimensions was expected by introducing ultrahigh-strength titanium alloys for less-invasive surgeries. The tested materials, in the form of thin, multi-layered coatings, showed nanocrystalline microstructures. Performed direct-cytotoxicity studies (including lactate dehydrogenase activity measurement) showed that there was a low probability of adverse effects on surrounding SAOS-2 (Homo sapiens bone osteosarcoma) cells. The microbiological studies (e.g., ISO 22196 contact tests) showed that implanting Ag nanoparticles into Ti/TixN coatings inhibited the growth of E. coli and S. aureus cells and reduced their adhesion to the material surface. These findings suggest that Ag-nanoparticles present in implant coatings may potentially minimize infection risk and lower inherent stress.
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