1
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Idriss H, Kutová A, Rimpelová S, Elashnikov R, Kolská Z, Lyutakov O, Švorčík V, Slepičková Kasálková N, Slepička P. Polymer-Metal Bilayer with Alkoxy Groups for Antibacterial Improvement. Polymers (Basel) 2024; 16:508. [PMID: 38399886 PMCID: PMC10892951 DOI: 10.3390/polym16040508] [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: 12/26/2023] [Revised: 02/09/2024] [Accepted: 02/10/2024] [Indexed: 02/25/2024] Open
Abstract
Many bio-applicable materials, medical devices, and prosthetics combine both polymer and metal components to benefit from their complementary properties. This goal is normally achieved by their mechanical bonding or casting only. Here, we report an alternative easy method for the chemical grafting of a polymer on the surfaces of a metal or metal alloys using alkoxy amine salt as a coupling agent. The surface morphology of the created composites was studied by various microscopy methods, and their surface area and porosity were determined by adsorption/desorption nitrogen isotherms. The surface chemical composition was also examined by various spectroscopy techniques and electrokinetic analysis. The distribution of elements on the surface was determined, and the successful bonding of the metal/alloys on one side with the polymer on the other by alkoxy amine was confirmed. The composites show significantly increased hydrophilicity, reliable chemical stability of the bonding, even interaction with solvent for thirty cycles, and up to 95% less bacterial adhesion for the modified samples in comparison with pristine samples, i.e., characteristics that are promising for their application in the biomedical field, such as for implants, prosthetics, etc. All this uses universal, two-step procedures with minimal use of energy and the possibility of production on a mass scale.
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Affiliation(s)
- Hazem Idriss
- Department of Solid-State Engineering, University of Chemistry and Technology Prague, Technická 3, 166 28 Prague, Czech Republic
| | - Anna Kutová
- Department of Solid-State Engineering, University of Chemistry and Technology Prague, Technická 3, 166 28 Prague, Czech Republic
| | - Silvie Rimpelová
- Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technická 3, 166 28 Prague, Czech Republic
| | - Roman Elashnikov
- Department of Solid-State Engineering, University of Chemistry and Technology Prague, Technická 3, 166 28 Prague, Czech Republic
| | - Zdeňka Kolská
- Faculty of Science, J. E. Purkyně University, 400 96 Usti nad Labem, Czech Republic
| | - Oleksiy Lyutakov
- Department of Solid-State Engineering, University of Chemistry and Technology Prague, Technická 3, 166 28 Prague, Czech Republic
| | - Václav Švorčík
- Department of Solid-State Engineering, University of Chemistry and Technology Prague, Technická 3, 166 28 Prague, Czech Republic
| | - Nikola Slepičková Kasálková
- Department of Solid-State Engineering, University of Chemistry and Technology Prague, Technická 3, 166 28 Prague, Czech Republic
| | - Petr Slepička
- Department of Solid-State Engineering, University of Chemistry and Technology Prague, Technická 3, 166 28 Prague, Czech Republic
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2
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Moussa H, El Hadad A, Sarrigiannidis S, Saad A, Wang M, Taqi D, Al-Hamed FS, Salmerón-Sánchez M, Cerruti M, Tamimi F. High toughness resorbable brushite-gypsum fiber-reinforced cements. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 127:112205. [PMID: 34225857 DOI: 10.1016/j.msec.2021.112205] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 04/18/2021] [Accepted: 05/19/2021] [Indexed: 12/27/2022]
Abstract
The ideal bone substitute material should be mechanically strong, biocompatible with a resorption rate matching the rate of new bone formation. Brushite (dicalcium phosphate dihydrate) cement is a promising bone substitute material but with limited resorbability and mechanical properties. To improve the resorbability and mechanical performance of brushite cements, we incorporated gypsum (calcium sulfate dihydrate) and diazonium-treated polyglactin fibers which are well-known for their biocompatibility and bioresorbability. Here we show that by combining brushite and gypsum, we were able to fabricate biocompatible composite cements with high fracture toughness (0.47 MPa·m1/2) and a resorption rate that matched the rate of new bone formation. Adding functionalized polyglactin fibers to this composite cement further improved the fracture toughness up to 1.00 MPa·m1/2. XPS and SEM revealed that the improvement in fracture toughness is due to the strong interfacial bonding between the functionalized fibers and the cement matrix. This study shows that adding gypsum and functionalized polyglactin fibers to brushite cements results in composite biomaterials that combine high fracture toughness, resorbability, and biocompatibility, and have great potential for bone regeneration.
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Affiliation(s)
- Hanan Moussa
- Faculty of Dentistry, McGill University, Montreal, QC H3A 0C7, Canada; Faculty of Dentistry, Benghazi University, Benghazi 9504, Libya
| | - Amir El Hadad
- Faculty of Dentistry, McGill University, Montreal, QC H3A 0C7, Canada; Physics Department, Faculty of Science, Al-Azhar University, Nasr City, Cairo 11884, Egypt
| | | | - Ahmed Saad
- Department of Mining and Materials Engineering, McGill University, Montreal, QC H3A 0C5, Canada
| | - Min Wang
- Faculty of Dentistry, McGill University, Montreal, QC H3A 0C7, Canada; Department of Oral Implantology, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - Doaa Taqi
- Faculty of Dentistry, McGill University, Montreal, QC H3A 0C7, Canada
| | | | | | - Marta Cerruti
- Department of Mining and Materials Engineering, McGill University, Montreal, QC H3A 0C5, Canada
| | - Faleh Tamimi
- Faculty of Dentistry, McGill University, Montreal, QC H3A 0C7, Canada; College of Dental Medicine, Qatar University, Doha 2713, Qatar.
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3
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Sandomierski M, Buchwald T, Patalas A, Voelkel A. Improving the abrasion resistance of Ti6Al4V alloy by modifying its surface with a diazonium salt and attaching of polyurethane. Sci Rep 2020; 10:19289. [PMID: 33159155 PMCID: PMC7648627 DOI: 10.1038/s41598-020-76360-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Accepted: 10/27/2020] [Indexed: 12/19/2022] Open
Abstract
Commonly used endoprostheses in the orthopedic industry are those made of Ti6Al4V titanium alloy. Unfortunately, this material has low abrasion resistance, and therefore methods of their modification are still sought. A sensible approach is coating the alloy with a layer of a polymer having higher abrasion resistance. The adhesion of polymers to alloy is low, therefore the alloy requires prior modification. In this work, the alloy was modified with three types of diazonium salt and the influence of substituent on the effectiveness of modification was determined. Then, five or ten polyurethane layers were attached to the surface of the modified alloy. Using Raman mapping, the uniform distribution of layers was proved. Layers are stable in simulated human body fluids. The effectiveness of attaching subsequent layers of polyurethane was also confirmed by nanoindentation. The main focus of this work was to improve the wear resistance of the titanium alloy. The obtained results indicate that the titanium alloy with a polyurethane layer has almost ten times lower coefficient of friction compared to pure alloy. Such a low value has not been described in the literature so far. These results are the first step for obtaining endoprostheses with very high abrasion resistance.
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Affiliation(s)
- Mariusz Sandomierski
- Institute of Chemical Technology and Engineering, Poznań University of Technology, Berdychowo 4, 60-965, Poznan, Poland.
| | - Tomasz Buchwald
- Institute of Materials Research and Quantum Engineering, Poznań University of Technology, Piotrowo 3, 60-965, Poznan, Poland
| | - Adam Patalas
- Institute of Mechanical Technology, Poznań University of Technology, Piotrowo 3, 60-965, Poznan, Poland
| | - Adam Voelkel
- Institute of Chemical Technology and Engineering, Poznań University of Technology, Berdychowo 4, 60-965, Poznan, Poland
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4
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Kumthekar MS, Tewary S, Sanyal PK. Evaluation of the effect of ultraviolet light polymerized clear adhesive on shear and tensile bond strength of heat cure denture base resin to the cobalt-chromium retentive minor connector: An in vitro study. J Indian Prosthodont Soc 2020; 20:394-401. [PMID: 33487967 PMCID: PMC7814690 DOI: 10.4103/jips.jips_85_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 05/19/2020] [Accepted: 06/22/2020] [Indexed: 11/29/2022] Open
Abstract
Aim: The aim of this study is to evaluate the efficacy of new material ultraviolet (UV) light polymerized clear adhesive on shear and tensile bond strength of heat cure denture base resin (Polymethylmethacrylate (PMMA)) to cobalt-chromium (Co-Cr) retentive minor connector. Setting and Design: Comparative evaluation- In-vitro study. Materials and Methods: Sixty samples of Co-Cr plates mimicking minor connectors were fabricated. Thirty samples were coated with new material UV light polymerized clear adhesive and cured under UV light source for 10 min. In gun-metal flask, metal plates were placed in the lower compartment over it. Heat cure acrylic resin was packed in the dough stage with the help of clamps and processed according to the manufacturer's instructions. Samples were kept in artificial saliva for 90 days. Shear and tensile bond strengths were calculated of each sample with a Universal testing machine, and results were statistically analyzed. Type of bond failure was observed for each sample under stereomicroscope. Statistical Analysis Used: Unpaired t test. Results: Tensile bond strength, as well as shear bond strength, showed that 0.93 N and 1.64 N respectively for without application of new adhesive was more as compared to that of samples with the application of new adhesive which is 0.75 N and 1.54 N respectively. Bond failure was found to be an adhesive failure in resin–metal interface. Conclusions: Excellent bonding seen between the new adhesive and acrylic interface but limited effect on the metal interface. To increase bond strength between metal and resin interface, some surface treatment with the metal surface is needed to increase the bonding of the new adhesive to the metal surface.
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Affiliation(s)
- Minal Sanjay Kumthekar
- Department of Prosthodontics and Crown and Bridge, School of Dental Sciences, KIMS-DU, Karad, Maharashtra, India
| | - Shivsagar Tewary
- Department of Prosthodontics and Crown and Bridge, School of Dental Sciences, KIMS-DU, Karad, Maharashtra, India
| | - Pronob Kumar Sanyal
- Department of Prosthodontics and Crown and Bridge, School of Dental Sciences, KIMS-DU, Karad, Maharashtra, India
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Oweis Y, Algizani S, Mezour MA, Alageel O, Abdallah MN, Mahjoubi H, Ng B, Laurenti M, Cerruti M, Tamimi F. Biocompatibility and Durability of Diazonium Adhesives on Dental Alloys. J Prosthodont 2019; 29:251-260. [PMID: 31782584 DOI: 10.1111/jopr.13129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/19/2019] [Indexed: 11/27/2022] Open
Abstract
PURPOSE A new type of diazonium-based adhesive has been recently developed by our team to bind dental alloys (Titanium, stainless steel, and cobalt chromium) to dental polymers. Here, we explored the endurance of the resulting adhesive after thermal-cycling and autoclave aging. MATERIALS AND METHODS Polished samples of titanium (Ti), stainless steel (SS) and cobalt chromium (Co-Cr) were coated with a diazonium-based adhesive. Untreated samples served as controls (n = 12 per each condition). X-ray photoelectron spectroscopy (XPS) was performed to characterize the elemental compositions of the different surfaces. Biocompatibility of the coated alloys was assessed with human gingival fibroblasts (HGF). Inductively coupled plasma (ICP) and total organic carbon (TOC) analyses were used to quantify the ions and organic matters released from the diazonium coated alloys. Endurance of the adhesives was assessed by exposing the samples to autoclaving and thermal-cycling. The tensile strength of the poly(methylmethacrylate) (PMMA)-alloy bond was also tested. RESULTS Results of mechanical testing demonstrated a higher endurance of the coated CoCr, Ti, and SS compared to the uncoated alloys. The human fibroblasts cultured on the substrates remained alive and metabolically active, and the coatings did not release significant amounts of toxic chemicals in solutions. CONCLUSIONS The results further support the use of diazonium-based adhesives as new coupling agents for dental applications.
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Affiliation(s)
- Yara Oweis
- Faculty of Dentistry, McGill University, Strathcona Anatomy and Dentistry Building, Rue University, Montreal, Quebec, H3A 0C7, Canada.,Faculty of Dentistry, University of Jordan, Queen Rania Street, Amman, Jordan
| | - Suliman Algizani
- Faculty of Dentistry, McGill University, Strathcona Anatomy and Dentistry Building, Rue University, Montreal, Quebec, H3A 0C7, Canada
| | - Mohamed-Amine Mezour
- Faculty of Dentistry, McGill University, Strathcona Anatomy and Dentistry Building, Rue University, Montreal, Quebec, H3A 0C7, Canada.,Department of Mining and Materials Engineering, McGill University, Montreal, Quebec, H3A 2B2, Canada
| | - Omar Alageel
- Faculty of Dentistry, McGill University, Strathcona Anatomy and Dentistry Building, Rue University, Montreal, Quebec, H3A 0C7, Canada.,King Saud University, College of Applied Medical Sciences, Riyadh, SA 11451
| | - Mohamed-Nur Abdallah
- Faculty of Dentistry, McGill University, Strathcona Anatomy and Dentistry Building, Rue University, Montreal, Quebec, H3A 0C7, Canada.,Faculty of Dentistry, University of Toronto, Toronto, ON, Canada
| | - Hesam Mahjoubi
- Department of Mining and Materials Engineering, McGill University, Montreal, Quebec, H3A 2B2, Canada
| | - Brandon Ng
- Department of Mining and Materials Engineering, McGill University, Montreal, Quebec, H3A 2B2, Canada
| | - Marco Laurenti
- Department of Chemistry in Pharmaceutical Science, Faculty of Pharmacy, Universidad Complutense Madrid, Spain.,Department of Photonic Materials, Instituto de Ciencia de Materiales de Madrid, Spain.,Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - Marta Cerruti
- Department of Mining and Materials Engineering, McGill University, Montreal, Quebec, H3A 2B2, Canada
| | - Faleh Tamimi
- Faculty of Dentistry, McGill University, Strathcona Anatomy and Dentistry Building, Rue University, Montreal, Quebec, H3A 0C7, Canada
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6
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Reggente M, Kriegel S, He W, Masson P, Pourroy G, Mura F, Faerber J, Passeri D, Rossi M, Palkowski H, Carradò A. How alkali-activated Ti surfaces affect the growth of tethered PMMA chains: a close-up study on the PMMA thickness and surface morphology. PURE APPL CHEM 2019. [DOI: 10.1515/pac-2019-0223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Abstract
The alkali-activation of titanium (Ti) surfaces performed in a heated sodium hydroxide (NaOH) aqueous solution, results in a porous layer rich in hydroxyl (OH) groups, the structure and porosity of which strongly depend on the reaction time and NaOH concentration used. In this study, a polymerization initiator is covalently grafted on the alkali-activated Ti substrates by using a phosphonic acid as coupling agent and the resulting surfaces are used as scaffolds to drive the growth of tethered poly(methyl methacrylate) (PMMA) chains via a surface initiated atom transfer radical polymerisation (SI-ATRP). A close-up investigation of how different treatment times (1 h, 3 h, 6 h, 12 h, and 24 h) and NaOH concentrations (0.1 M, 0.5 M, 1 M, 2 M, and 5 M) affect the final PMMA morphology and thickness are presented.
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Affiliation(s)
- Melania Reggente
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
- Department of Basic and Applied Sciences for Engineering (BASE) , Sapienza University of Rome , Via Antonio Scarpa 16 , 00161 Rome , Italy
| | - Sebastien Kriegel
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
| | - Wenjia He
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
| | - Patrick Masson
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
| | - Geneviève Pourroy
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
| | - Francesco Mura
- Center for Nanotechnology for Engineering (CNIS) , Sapienza University of Rome , P. le A. Moro 5 , 00185 Rome , Italy
| | - Jacques Faerber
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
| | - Daniele Passeri
- Department of Basic and Applied Sciences for Engineering (BASE) , Sapienza University of Rome , Via Antonio Scarpa 16 , 00161 Rome , Italy
| | - Marco Rossi
- Department of Basic and Applied Sciences for Engineering (BASE) , Sapienza University of Rome , Via Antonio Scarpa 16 , 00161 Rome , Italy
- Center for Nanotechnology for Engineering (CNIS) , Sapienza University of Rome , P. le A. Moro 5 , 00185 Rome , Italy
| | - Heinz Palkowski
- Clausthal University of Technology (TUC), IMET Institute of Metallurgy , Robert-Koch-Strasse 42 , 38678 Clausthal-Zellerfeld , Germany
| | - Adele Carradò
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
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7
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Alsheghri AA, Alageel O, Amine Mezour M, Sun B, Yue S, Tamimi F, Song J. Bio-inspired and optimized interlocking features for strengthening metal/polymer interfaces in additively manufactured prostheses. Acta Biomater 2018; 80:425-434. [PMID: 30244027 DOI: 10.1016/j.actbio.2018.09.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 08/28/2018] [Accepted: 09/13/2018] [Indexed: 01/02/2023]
Abstract
Biomedical and dental prostheses combining polymers with metals often suffer failure at the interface. The weak chemical bond between these two dissimilar materials can cause debonding and mechanical failure. This manuscript introduces a new mechanical interlocking technique to strengthen metal/polymer interfaces through optimized additively manufactured features on the metal surface. To reach an optimized design of interlocking features, we started with the bio-mimetic stress-induced material transformation (SMT) optimization method. The considered polymer and metal materials were cold-cured Poly(methyl methacrylate) (PMMA) and laser-sintered Cobalt-Chromium (Co-Cr), respectively. Optimal dimensions of the bio-inspired interlocking features were then determined by mesh adaptive direct search (MADS) algorithm combined with finite element analysis (FEA) and tensile experiments such that they provide the maximum interfacial tensile strength and stiffness while minimizing the stress in PMMA and the displacement of PMMA at the Co-Cr/PMMA interface. The SMT optimization process suggested a Y-shape as a more favorable design, which was similar to mangrove tree roots. Experiments confirmed that our optimized interlocking features increased the strength of the Co-Cr/PMMA interface from 2.3 MPa (flat interface) to 34.4 ± 1 MPa, which constitutes 85% of the tensile failure strength of PMMA (40.2 ± 1 MPa). STATEMENT OF SIGNIFICANCE: The objective of this study was to improve metal/polymer interfacial strength in dental and orthopedic prostheses. This was achieved by additive manufacturing of optimized interlocking features on metallic surfaces using laser-sintering. The interlocking design of the features, which was a Y-shape similar to the roots of mangrove trees, was inspired by a bio-memetic optimization algorithm. This interlocking design lowered the PMMA displacement at the Co-Cr/PMMA interface by 70%, enhanced the interfacial strength by more than 12%, and increased the stiffness by 18% compared with a conventional bead design, meanwhile no significant difference was found in the toughness of both designs.
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8
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Diazonium Salts: Versatile Molecular Glues for Sticking Conductive Polymers to Flexible Electrodes. SURFACES 2018. [DOI: 10.3390/surfaces1010005] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Adhesion of polymers to surfaces is of the upmost importance in timely applications such as protective coatings, biomaterials, sensors, new power sources and soft electronics. In this context, this work examines the role of molecular interactions in the adhesion of polypyrrole thin films to flexible Indium Tin Oxide (ITO) electrodes grafted with aryl layers from various diazonium salts, namely 4-carboxybenzenediazonium (ITO-CO2H), 4-sulfonicbenzenediazonium (ITO-SO3H), 4-N,N-dimethylbenzenediazonium (ITO-N(CH3)2), 4-aminobenzenediazonium (ITO-NH2), 4-cyanobenzenediazonium (ITO-CN) and 4-N-phenylbenzenediazonium (ITO-NHPh). It was demonstrated that PPy thin layers were adherent to all aryl-modified surfaces, whereas adhesive failure was noted for bare ITO following simple solvent washing or sonication. Adhesion of polypyrrole was investigated in terms of hydrophilic/hydrophobic character of the underlying aryl layer as probed by contact angle measurements. It was found that sulfonic acid-doped polypyrrole (PPy-BSA) thin films were preferably deposited on the most hydrophobic surfaces. More importantly, the redox properties and electrochemical impedance of PPy were closely related to the hydrophobic character of the aryl layers. This work demonstrates that diazonium compounds are unique molecular glues for conductive polymers and permit to tune their interfacial properties. With robust, diazonium-based architectured interfaces, one can design high performance materials for e.g., sensors, printed soft electronics and flexible thermoelectrics.
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9
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Mezour MA, Oweis Y, El-Hadad AA, Algizani S, Tamimi F, Cerruti M. Surface modification of CoCr alloys by electrochemical reduction of diazonium salts. RSC Adv 2018; 8:23191-23198. [PMID: 35540168 PMCID: PMC9081548 DOI: 10.1039/c8ra02634c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 04/05/2018] [Indexed: 12/31/2022] Open
Abstract
Tailoring the surface chemistry of CoCr alloys is of tremendous interest in many biomedical applications. In this work, we show that CoCr can be modified by diazonium electrografting provided the surface is not homogeneously covered with an oxide layer. Cyclic voltammetry (CV) and X-ray photoelectron spectroscopy (XPS) show the electrografting of a poly(aminophenylene) (PAP) layer on CoCr when treated at a reductive potential (CoCr-0.5 V), whereas no PAP film was formed on CoCrOCP and CoCr1 V, treated at open circuit and anodic potentials respectively. Based on XPS results, we attributed the electrografting to the formation of carbide bonds between PAP and the inhomogeneous thin oxide layer of CoCr-0.5 V. We then show an example of application of PAP coatings on CoCr and prove that the presence of a PAP coating on CoCr-0.5 V results in a 5-fold increase of the adherence of poly methyl methacrylate (PMMA) to PAP-coated CoCr compared to uncoated samples; this is of prime significance to improving the long-term stability of dental prostheses. These findings support the importance of reducing the oxide layer for effective functionalization of metal oxides with aryl diazonium salts and suggest a promising surface modification approach for biomedical applications.
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Affiliation(s)
- M A Mezour
- Department of Mining and Materials Engineering, McGill University Montreal Quebec H3A 2B2 Canada
- Faculty of Dentistry, McGill University, 3640, Strathcona Anatomy and Dentistry Building, Rue University Montreal Quebec H3A 0C7 Canada
| | - Y Oweis
- Faculty of Dentistry, McGill University, 3640, Strathcona Anatomy and Dentistry Building, Rue University Montreal Quebec H3A 0C7 Canada
| | - A A El-Hadad
- Faculty of Dentistry, McGill University, 3640, Strathcona Anatomy and Dentistry Building, Rue University Montreal Quebec H3A 0C7 Canada
- Physics Department, Faculty of Science, Al-Azhar University Nasr City Cairo Egypt
| | - S Algizani
- Faculty of Dentistry, McGill University, 3640, Strathcona Anatomy and Dentistry Building, Rue University Montreal Quebec H3A 0C7 Canada
| | - F Tamimi
- Faculty of Dentistry, McGill University, 3640, Strathcona Anatomy and Dentistry Building, Rue University Montreal Quebec H3A 0C7 Canada
| | - M Cerruti
- Department of Mining and Materials Engineering, McGill University Montreal Quebec H3A 2B2 Canada
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10
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Abdallah MN, Abughanam G, Tran SD, Sheikh Z, Mezour MA, Basiri T, Xiao Y, Cerruti M, Siqueira WL, Tamimi F. Comparative adsorption profiles of basal lamina proteome and gingival cells onto dental and titanium surfaces. Acta Biomater 2018; 73:547-558. [PMID: 29660511 DOI: 10.1016/j.actbio.2018.04.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 03/06/2018] [Accepted: 04/09/2018] [Indexed: 01/24/2023]
Abstract
Titanium (Ti) dental implants are susceptible to bacterial infections and failure due to lack of proper epithelial seal. Epithelial cells establish a strong epithelial seal around natural teeth by the deposition of basal lamina (BL) proteins that adsorb on the tooth surface. This seal can even be re-established onto cementum or dentin following injury or periodontal therapy. However, it is unclear how tooth surfaces promote this cell attachment and protein adsorption. Understanding the interactions between BL proteins and epithelial cells with dentin and Ti will facilitate the development of implant surfaces that promote the formation of an epithelial seal and improve the success of periodontal therapy and wound healing on natural teeth. To study these interactions, we used a surface proteomic approach to decipher the adsorption profile of BL proteins onto Ti and dentin, and correlated these adsorption profiles with in vitro interactions of human gingival fibroblasts and epithelial cells. Results showed that dentin adsorbed higher amounts of key BL proteins, particularly laminin and nidogen-1, and promoted more favorable interactions with epithelial cells than Ti. Next, dentin specimens were deproteinized or partially demineralized to determine if its mineral or protein component was responsible for BL adsorption and cell attachment. Deproteinized (mineral-rich) and partially demineralized (protein-rich) dentin specimens revealed BL proteins (i.e. laminin and nidogen-1) and epithelial cells interact preferentially with dentinal proteins rather than dentin mineral. These findings suggest that, unlike Ti, dentin and, in particular, dentinal proteins have a selective affinity to BL proteins that enhance epithelial cell attachment. STATEMENT OF SIGNIFICANCE It is remains unclear why natural teeth, unlike titanium dental implants, promote the formation of an epithelial seal that protects them against the external environment. This study used a surface screening approach to analyze the adsorption of proteins produced by epithelial tissues onto tooth-dentin and titanium surfaces, and correlate it with the behaviour of cells. This study shows that tooth-dentin, in particular its proteins, has a higher selective affinity to certain adhesion proteins, and subsequently allows more favourable interactions with epithelial cells than titanium. This knowledge could help in developing new approaches for re-establishing and maintaining the epithelial seal around teeth, and could pave the way for developing implants with surfaces that allow the formation of a true epithelial seal.
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11
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Reggente M, Masson P, Dollinger C, Palkowski H, Zafeiratos S, Jacomine L, Passeri D, Rossi M, Vrana NE, Pourroy G, Carradò A. Novel Alkali Activation of Titanium Substrates To Grow Thick and Covalently Bound PMMA Layers. ACS APPLIED MATERIALS & INTERFACES 2018; 10:5967-5977. [PMID: 29338177 DOI: 10.1021/acsami.7b17008] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Titanium (Ti) is the most widely used metal in biomedical applications because of its biocompatibility; however, the significant difference in the mechanical properties between Ti and the surrounding tissues results in stress shielding which is detrimental for load-bearing tissues. In the current study, to attenuate the stress shielding effect, a new processing route was developed. It aimed at growing thick poly(methyl methacrylate) (PMMA) layers grafted on Ti substrates to incorporate a polymer component on Ti implants. However, the currently available methods do not allow the development of thick polymeric layers, reducing significantly their potential uses. The proposed route consists of an alkali activation of Ti substrates followed by a surface-initiated atom transfer radical polymerization using a phosphonic acid derivative as a coupling agent and a polymerization initiator and malononitrile as a polymerization activator. The average thickness of the grown PMMA layers is approximately 1.9 μm. The Ti activation-performed in a NaOH solution-leads to a porous sodium titanate interlayer with a hierarchical structure and an open microporosity. It promotes the covalent grafting reaction because of high hydroxyl groups' content and enables establishing a further mechanical interlocking between the growing PMMA layer and the Ti substrate. As a result, the produced graduated structure possesses high Ti/PMMA adhesion strength (∼260 MPa). Moreover, the PMMA layer is (i) thicker compared to those obtained with the previously reported techniques (∼1.9 μm), (ii) stable in a simulated body fluid solution, and (iii) biocompatible. This strategy opens new opportunities toward hybrid prosthesis with adjustable mechanical properties with respect to host bone properties for personalized medicines.
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Affiliation(s)
- Melania Reggente
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS, Université de Strasbourg , 23 rue du Loess BP 43, 67034 Strasbourg, France
- Department of Basic and Applied Sciences for Engineering (BASE), Sapienza University of Rome , Via Antonio Scarpa 16, 00161 Rome, Italy
| | - Patrick Masson
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS, Université de Strasbourg , 23 rue du Loess BP 43, 67034 Strasbourg, France
| | | | - Heinz Palkowski
- Clausthal University of Technology (TUC), IMET Institute of Metallurgy , Robert-Koch-Strasse 42, 38678 Clausthal-Zellerfeld, Germany
| | - Spyridon Zafeiratos
- Institut de Chimie et Procédés pour l'Énergie, l'Environnement et la Santé (ICPEES), CNRS, Université de Strasbourg , 25 rue Becquerel, 67087 Strasbourg, France
| | - Leandro Jacomine
- Institut Charles Sadron, CNRS, UPR 22 , 23 rue du Loess BP 84047, 67034 Strasbourg, France
| | - Daniele Passeri
- Department of Basic and Applied Sciences for Engineering (BASE), Sapienza University of Rome , Via Antonio Scarpa 16, 00161 Rome, Italy
| | - Marco Rossi
- Department of Basic and Applied Sciences for Engineering (BASE), Sapienza University of Rome , Via Antonio Scarpa 16, 00161 Rome, Italy
- Center for Nanotechnology for Engineering (CNIS), Sapienza University of Rome , P. le A. Moro 5, 00185 Rome, Italy
| | - Nihal Engin Vrana
- Protip Medical , 8 Place de l'Hôpital, 67000 Strasbourg, France
- Institut National de la Santé et de la Recherche Médicale, INSERM Unité , 1121, 11 rue Humann, 67085 Strasbourg Cedex, France
- Université de Strasbourg, Faculté de Chirurgie Dentaire, Fédération de Médecine Translationnelle de Strasbourg, Fédération de Recherche Matériaux et Nanosciences Grand Est (FRMNGE) , P. le A. Moro 5, 67000 Strasbourg, France
| | - Geneviève Pourroy
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS, Université de Strasbourg , 23 rue du Loess BP 43, 67034 Strasbourg, France
| | - Adele Carradò
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS, Université de Strasbourg , 23 rue du Loess BP 43, 67034 Strasbourg, France
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12
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Reggente M, Natali M, Passeri D, Lucci M, Davoli I, Pourroy G, Masson P, Palkowski H, Hangen U, Carradò A, Rossi M. Multiscale mechanical characterization of hybrid Ti/PMMA layered materials. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.05.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Metal-composite adhesion based on diazonium chemistry. Dent Mater 2017; 33:e393-e404. [DOI: 10.1016/j.dental.2017.07.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 06/11/2017] [Accepted: 07/13/2017] [Indexed: 11/21/2022]
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14
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Alageel O, Abdallah M, Alsheghri A, Song J, Caron E, Tamimi F. Removable partial denture alloys processed by laser‐sintering technique. J Biomed Mater Res B Appl Biomater 2017; 106:1174-1185. [DOI: 10.1002/jbm.b.33929] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 05/03/2017] [Accepted: 05/12/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Omar Alageel
- Faculty of DentistryMcGill UniversityMontreal Quebec Canada
- College of Applied Medical SciencesKing Saud UniversityRiyadh Saudi Arabia
| | | | - Ammar Alsheghri
- Department of Mining and Materials EngineeringMcGill UniversityMontreal Quebec Canada
| | - Jun Song
- Department of Mining and Materials EngineeringMcGill UniversityMontreal Quebec Canada
| | | | - Faleh Tamimi
- Faculty of DentistryMcGill UniversityMontreal Quebec Canada
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15
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Abdallah MN, Tran SD, Abughanam G, Laurenti M, Zuanazzi D, Mezour MA, Xiao Y, Cerruti M, Siqueira WL, Tamimi F. Biomaterial surface proteomic signature determines interaction with epithelial cells. Acta Biomater 2017; 54:150-163. [PMID: 28259836 DOI: 10.1016/j.actbio.2017.02.044] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 02/21/2017] [Accepted: 02/27/2017] [Indexed: 12/31/2022]
Abstract
Cells interact with biomaterials indirectly through extracellular matrix (ECM) proteins adsorbed onto their surface. Accordingly, it could be hypothesized that the surface proteomic signature of a biomaterial might determine its interaction with cells. Here, we present a surface proteomic approach to test this hypothesis in the specific case of biomaterial-epithelial cell interactions. In particular, we determined the surface proteomic signature of different biomaterials exposed to the ECM of epithelial cells (basal lamina). We revealed that the biomaterial surface chemistry determines the surface proteomic profile, and subsequently the interaction with epithelial cells. In addition, we found that biomaterials with surface chemistries closer to that of percutaneous tissues, such as aminated PMMA and aminated PDLLA, promoted higher selective adsorption of key basal lamina proteins (laminins, nidogen-1) and subsequently improved their interactions with epithelial cells. These findings suggest that mimicking the surface chemistry of natural percutaneous tissues can improve biomaterial-epithelial integration, and thus provide a rationale for the design of improved biomaterial surfaces for skin regeneration and percutaneous medical devices. STATEMENT OF SIGNIFICANCE Failure of most biomaterials originates from the inability to predict and control the influence of their surface properties on biological phenomena, particularly protein adsorption, and cellular behaviour, which subsequently results in unfavourable host response. Here, we introduce a surface-proteomic screening approach using a label-free mass spectrometry technique to decipher the adsorption profile of extracellular matrix (ECM) proteins on different biomaterials, and correlate it with cellular behaviour. We demonstrated that the way a biomaterial selectively interacts with specific ECM proteins of a given tissue seems to determine the interactions between the cells of that tissue and biomaterials. Accordingly, this approach can potentially revolutionize the screening methods for investigating the protein-cell-biomaterial interactions and pave the way for deeper understanding of these interactions.
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16
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Al-Hashedi AA, Laurenti M, Abdallah MN, Albuquerque RF, Tamimi F. Electrochemical Treatment of Contaminated Titanium Surfaces in Vitro: An Approach for Implant Surface Decontamination. ACS Biomater Sci Eng 2016; 2:1504-1518. [DOI: 10.1021/acsbiomaterials.6b00265] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Ashwaq Ali Al-Hashedi
- Faculty
of Dentistry, McGill University, 3640 University Street, Montreal, Quebec H3A 0C7, Canada
- Department
of Prosthodontics, Faculty of Dentistry, Sana’a University, Wadi Dhaher Road, Sana’a, Yemen
| | - Marco Laurenti
- Department
of Physical Chemistry, Complutense University of Madrid, Avenida Séneca,
2, 28040 Madrid, Spain
| | - Mohamed-Nur Abdallah
- Faculty
of Dentistry, McGill University, 3640 University Street, Montreal, Quebec H3A 0C7, Canada
| | - Rubens F. Albuquerque
- Faculty
of Dentistry of Ribeirão Preto, University of São Paulo, 253 Avenida Prof. Dr. Zeferino Vaz, 109 Vila Monte Alegre, Ribeirão Preto, São Paulo, Brazil
| | - Faleh Tamimi
- Faculty
of Dentistry, McGill University, 3640 University Street, Montreal, Quebec H3A 0C7, Canada
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17
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Al-Hashedi AA, Laurenti M, Benhamou V, Tamimi F. Decontamination of titanium implants using physical methods. Clin Oral Implants Res 2016; 28:1013-1021. [PMID: 27392811 DOI: 10.1111/clr.12914] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/03/2016] [Indexed: 12/30/2022]
Abstract
OBJECTIVES Current decontamination methods of titanium (Ti) implant present limited success in achieving predictable re-osseointegration. We hypothesized that even though these techniques could be useful in elimination of bacteria, they might be unsuccessful in removing organic contaminants and restoring the original surface composition. The aim of this study was to assess the effect of four decontamination methods on the surface chemistry and bacterial load of biofilm-contaminated implant surfaces in order to improve implant surface decontamination. MATERIAL AND METHODS The ability of clinically available methods such as metal and plastic curettes, Ti brushes and Er: YAG laser to decontaminate Ti implant surfaces was assessed. Surface morphology, chemical composition and properties of machined Ti discs (Ø 5.0 and 1.0 mm thick) were analysed before and after oral biofilm contamination using scanning electron microscope and X-ray photoelectron spectroscopy. The presence and viability of bacteria were evaluated with live-dead assays. RESULTS Biofilm contamination created an organic layer rich in hydrocarbons and bacteria that covered entirely the Ti surfaces. This organic layer has tightly adhered to Ti surfaces and could not be completely removed with any of the methods assessed. Ti brushes achieved greater elimination of organic contaminants and bacteria than curettes and Er: YAG laser; however, none of them was able to restore the original surface chemistry. Alternatively, Er: YAG laser-treated surfaces showed the lowest live-to-dead bacterial ratio. CONCLUSIONS Ti brushes were more effective than curettes (metal or plastic) and Er: YAG laser in decontaminating Ti implant surfaces, although none of these techniques was able to completely eliminate surface contamination. Er: YAG laser was more effective than curettes and Ti brushes in killing the biofilm bacteria.
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Affiliation(s)
- Ashwaq A Al-Hashedi
- Faculty of Dentistry, McGill University, Montreal, QC, Canada.,Department of Prosthodontics, Faculty of Dentistry, Sana'a University, Sana'a, Yemen
| | - Marco Laurenti
- Department of Physical Chemistry, Complutense University of Madrid, Madrid, Spain
| | | | - Faleh Tamimi
- Faculty of Dentistry, McGill University, Montreal, QC, Canada
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18
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Vechiato-Filho AJ, da Silva Vieira Marques I, Dos Santos DM, Matos AO, Rangel EC, da Cruz NC, Barão VAR. Effect of nonthermal plasma treatment on surface chemistry of commercially-pure titanium and shear bond strength to autopolymerizing acrylic resin. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 60:37-44. [PMID: 26706504 DOI: 10.1016/j.msec.2015.11.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 10/02/2015] [Accepted: 11/03/2015] [Indexed: 10/22/2022]
Abstract
The effect of nonthermal plasma on the surface characteristics of commercially pure titanium (cp-Ti), and on the shear bond strength between an autopolymerizing acrylic resin and cp-Ti was investigated. A total of 96 discs of cp-Ti were distributed into four groups (n=24): Po (no surface treatment), SB (sandblasting), Po+NTP and SB+NTP (methane plasma). Surface characterization was performed through surface energy, surface roughness, scanning microscopy, energy dispersive spectroscopy, and X-ray diffraction tests. Shear bond strength test was conducted immediately and after thermocycling. Surface treatment affected the surface energy and roughness of cp-Ti discs (P<.001). SEM-EDS showed the presence of the carbide thin film. XRD spectra revealed no crystalline phase changes. The SB+NTP group showed the highest bond strength values (6.76±0.70 MPa). Thermocycling reduced the bond strength of the acrylic resin/cp-Ti interface (P<.05), except for Po group. NTP is an effective treatment option for improving the shear bond strength between both materials.
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Affiliation(s)
- Aljomar José Vechiato-Filho
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Univ. Estadual Paulista - UNESP, Aracatuba, Sao Paulo, Brazil.
| | - Isabella da Silva Vieira Marques
- Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Sao Paulo, Brazil
| | - Daniela Micheline Dos Santos
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Univ. Estadual Paulista - UNESP, Aracatuba, Sao Paulo, Brazil
| | - Adaias Oliveira Matos
- Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Sao Paulo, Brazil
| | - Elidiane Cipriano Rangel
- Laboratory of Technological Plasmas (LaPTec), Engineering College, Univ. Estadual Paulista - UNESP, Sorocaba, Sao Paulo, Brazil
| | - Nilson Cristino da Cruz
- Laboratory of Technological Plasmas (LaPTec), Engineering College, Univ. Estadual Paulista - UNESP, Sorocaba, Sao Paulo, Brazil
| | - Valentim Adelino Ricardo Barão
- Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Sao Paulo, Brazil
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