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Sánchez-Chávez HD, Flores-Cano L, Santiago-Hernández A, García-Soriano AA. Multifractal approach for a biological porous media: Human dentin case. Microsc Res Tech 2024; 87:10-20. [PMID: 37792891 DOI: 10.1002/jemt.24378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 06/07/2023] [Accepted: 06/14/2023] [Indexed: 10/06/2023]
Abstract
A multifractal characterization to human dentin porosity is made. Micrographs of human dentin samples gotten from scanning electron microscopy (SEM) were studied in order to characterize porosity. We got the generalized dimensions (multifractal moments)D q for pore space and matrix skeleton on gray scale and binary images for samples of both gender. For the case, we found that superficial porosityη s is linked to mass fractal dimensionD 0 in an approximately linear relationship asD 0 ≈ η s + d ¯ for binary images. In addition, probability density distribution (PDD) for pore diameters is found a normal PDD type. Other quantities of interest like mean, standard deviation, maximum and minimum pore diameters, voit ratios, and percentage of chemical composition are reported. RESEARCH HIGHLIGHTS: SEM sample, images and procedure for multifractal analysis are detailed. Micro patterns in grayscale are multifractal and in binary scale are monofractals. Superficial porosity is relate to mass fractal dimension approximately linearly. From the porosity values, voit ratios are determined. Pores diameters obey a normal PDD.
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Affiliation(s)
- H D Sánchez-Chávez
- Instituto de Física y Matemáticas, Universidad Tecnológica de la Mixteca, Huajuapan de León, Oaxaca, México
| | - L Flores-Cano
- Instituto de Investigaciones en Matemáticas Aplicadas y Sistemas, Universidad Nacional Autónoma de México, Unidad Mérida, Ucú, Yucatan, México
| | - A Santiago-Hernández
- Instituto de Física y Matemáticas, Universidad Tecnológica de la Mixteca, Huajuapan de León, Oaxaca, México
| | - A A García-Soriano
- Instituto de Física y Matemáticas, Universidad Tecnológica de la Mixteca, Huajuapan de León, Oaxaca, México
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Cell-Free Biomimetic Mineralization Strategies to Regenerate the Enamel Microstructure. CRYSTALS 2021. [DOI: 10.3390/cryst11111385] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The distinct architecture of native enamel gives it its exquisite appearance and excellent intrinsic-extrinsic fracture toughening properties. However, damage to the enamel is irreversible. At present, the clinical treatment for enamel lesion is an invasive method; besides, its limitations, caused by the chemical and physical difference between restorative materials and dental hard tissue, makes the restorative effects far from ideal. With more investigations on the mechanism of amelogenesis, biomimetic mineralization techniques for enamel regeneration have been well developed, which hold great promise as a non-invasive strategy for enamel restoration. This review disclosed the chemical and physical mechanism of amelogenesis; meanwhile, it overviewed and summarized studies involving the regeneration of enamel microstructure in cell-free biomineralization approaches, which could bring new prospects for resolving the challenges in enamel regeneration.
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Abstract
A model of a layered hierarchically constructed composite is presented, the structure of which demonstrates the properties of similarity at different scales. For the proposed model of the composite, fractal analysis was carried out, including an assessment of the permissible range of scales, calculation of fractal capacity, Hausdorff and Minkovsky dimensions, calculation of the Hurst exponent. The maximum and minimum sizes at which fractal properties are observed are investigated, and a quantitative assessment of the complexity of the proposed model is carried out. A software package is developed that allows calculating the fractal characteristics of hierarchically constructed composite media. A qualitative analysis of the calculated fractal characteristics is carried out.
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Solaymani S, Nezafat NB, Ţălu Ş, Shafiekhani A, Dalouji V, Amiri A, Rezaee S, Morozov IA. Atomic force microscopy studies of enamel, inner enamel, dentin, and cementum in canine teeth. Microsc Res Tech 2021; 84:1098-1105. [PMID: 33405274 DOI: 10.1002/jemt.23668] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 10/07/2020] [Accepted: 11/22/2020] [Indexed: 02/05/2023]
Abstract
The main goal of the present work is to explore the three dimensional (3-D) atomic force microscopy (AFM) images of human teeth and investigating their micromorphology. For this purpose, 10 fresh and permanent canine teeth were selected from a group of 40-year-old men who were candidate for the experimental processes. Afterward, they were all applied for studying the morphology of their hard tissues. The tapping mode of AFM was used to characterize the surface micromorphology on the square areas of 1 μm × 1 μm (512 × 512 pts). AFM results and surface stereometric analysis indicate the relationships between the micromorphology of the surface and the structural properties of these tissues across the length scales. As can be seen, the surface of cementum has the most irregular topography (D = 2.87 ± 0.01) while the most regular topography (D = 2.43 ± 0.01) is found in dentin. Furthermore, the more and less regularity of the surface have been found in inner enamel (Sq = 26.26 nm) and dentin (Sq = 41.28 nm), respectively. Stereometric and fractal analyses give valuable information about human canine teeth via 3-D micromorphology.
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Affiliation(s)
- Shahram Solaymani
- School of Physics, Institute for Research in Fundamental Sciences, Tehran, Iran
- Department of Physics, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
| | | | - Ştefan Ţălu
- Technical University of Cluj-Napoca, The Directorate of Research, Development and Innovation Management (DMCDI), Cluj-Napoca, Romania
| | - Azizollah Shafiekhani
- Department of Physics, Faculty of Physics and Chemistry, Alzahra University, Tehran, Iran
| | - Vali Dalouji
- Department of Physics, Faculty of Science, Malayer University, Malayer, Iran
| | - Ali Amiri
- Department of Dentistry, Faculty of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Sahar Rezaee
- Department of Physics, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
| | - Ilya A Morozov
- Institute of Continuous Media Mechanics UB RAS, Perm, Russia
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Solaymani S, Kulesza S, Nezafat NB, Shafiekhani A, Ţălu Ş, Dalouji V, Rezaee S, Boochani A. Multiscale Surface Microtexture Analysis of CuNPs@a-C:H Thin Films. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c04807] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Shahram Solaymani
- Department of Physics, Kermanshah Branch, Islamic Azad University, Kermanshah, 6718997551, Iran
| | - Slawomir Kulesza
- Faculty of Technical Sciences, Warmia and Mazury University in Olsztyn, Oczapowskiego 11, Olsztyn, 10-719, Poland
| | - Negin Beryani Nezafat
- School of Physics, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran, 1953833511, Iran
| | - Azizollah Shafiekhani
- Department of Physics, Faculty of Physics and Chemistry, Alzahra University, Tehran, 1993891167, Iran
| | - Ştefan Ţălu
- The Directorate of Research, Development and Innovation Management (DMCDI), Technical University of Cluj-Napoca, Constantin Daicoviciu Street, No. 15, Cluj-Napoca, Cluj County 400020, Romania
| | - Vali Dalouji
- Department of Physics, Faculty of Science, Malayer University, Malayer, 6571995863, Iran
| | - Sahar Rezaee
- Department of Physics, Kermanshah Branch, Islamic Azad University, Kermanshah, 6718997551, Iran
| | - Arash Boochani
- Department of Physics, Kermanshah Branch, Islamic Azad University, Kermanshah, 6718997551, Iran
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Goudarzi S, Dalouji V, Solaymani S. The relation between the average diameter of CNTs on Ni-Cu @ a-C:H catalyst with the optical absorption edge and the optical dispersion parameters. J Microsc 2020; 282:3-12. [PMID: 33047824 DOI: 10.1111/jmi.12970] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 08/12/2020] [Accepted: 10/09/2020] [Indexed: 11/30/2022]
Abstract
In this study, the average diameter of the grown CNTs on Ni-Cu NPs @ a-C:H substrates were increased by increasing of Cu content. The obtained results indicated that by increase of Cu content, all films exhibited high-absorption spectra; therefore, we were facing an increase in the energy gap of films. The values of dT/dλ and dR/dλ measurements for grown CNTs with 75% Cu shown that maximum values of optical band gap correspond to with values of 2.48 eV and 2.90 eV, respectively. It can be seen that with increase of average diameter of the grown CNTs, the values of Urbach energy of films were increased. The RBS and EDAX measurements were confirmed presence of Ni and Cu atoms into films. The films deposited with 75% Cu were more smooth. Films deposited with 75% Cu have more disordered. Films deposited with 75% Cu atoms have maximum values of the oscillator strength f and the dispersion energy Ed about of 0.108 eV2 and 0.0543 eV, respectively.
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Affiliation(s)
- S Goudarzi
- Department of Physics, Faculty of Science, Malayer University, Malayer, Iran
| | - V Dalouji
- Department of Physics, Faculty of Science, Malayer University, Malayer, Iran
| | - S Solaymani
- Department of physics, Kermanshah Branch, Islamic Azad university, Kermanshah, Iran
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Matos RS, Ramos GQ, da Fonseca Filho HD, Ţălu Ş. Advanced micromorphology study of microbial films grown on Kefir loaded with Açaí extract. Micron 2020; 137:102912. [PMID: 32585567 DOI: 10.1016/j.micron.2020.102912] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 06/15/2020] [Accepted: 06/15/2020] [Indexed: 02/07/2023]
Abstract
In this work, an advanced analysis of the 3D surface microtexture of the microbial films grown on Kefir loaded with Açaí extract was performed. Atomic force microscopy was used to characterize the 3D surface microtexture data in correlation with the stereometric analyses to allow a better understanding of the surface micromorphology consistent with ISO 25178-2: 2012. Two new parameters, fractal succolarity and fractal lacunarity, have been inserted for a quantitative approach to microtexture. The results revealed that the morphology was affected by the increase of the Açaí concentration in biofilms, as well as the fractal succolarity and lacunarity. Adhesive bacteria of the genus Lactobacillus were observed for the lowest concentrations of Açaí. Moreover, it was found that the surface of the biofilms has shown saturation when the concentration has changed from 4 to 6 % of Açaí. These results are of great interest in the characterization of surfaces with promising application like skin dressing.
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Affiliation(s)
- Robert S Matos
- Federal University of Amapá, Amazonian Materials Group, Physics Department, Amapá, Brazil; Federal University of Sergipe, Materials Engineering Department, Sergipe, Brazil
| | - Glenda Q Ramos
- Postgraduate Program in Tropical Medicine, State University of Amazonas, Manaus, Amazonas, Brazil
| | - Henrique D da Fonseca Filho
- Federal University of Amazonas, Laboratory of Nanomaterials Synthesis and Nanoscopy, Physics Department, Amazonas, Brazil.
| | - Ştefan Ţălu
- Technical University of Cluj-Napoca, The Directorate of Research, Development and Innovation Management (DMCDI), Cluj County, Romania
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Multifractal analysis of human canine teeth at nano scale: atomic force microscopy studies. INTERNATIONAL NANO LETTERS 2020. [DOI: 10.1007/s40089-019-00293-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
AbstractThe aim of the present study is to explore the 3-D micromorphology of human canine teeth materials using multifractal analysis through atomic force microscopy (AFM). The 3-D surfaces of ten extracted canine teeth of a group of 40 year old men were studied (enamel, inter enamel, inter dentin, and cementum) by AFM images in tapping mode and on square areas of 1 μm × 1 μm (512 × 512 points). The AFM images and surface multifractal analysis confirm the dependency of surface micromorphology to their structure–property of these materials across the length scales of the teeth structural architecture. Surface statistical parameters and hence, multifractal approach have been considered as reliable and sensitive tools for quantifying the 3-D surface microtexture changes of human canine teeth materials. The surface of inter dentin had the most irregular topography (the width spectrum Δα = 2.8361, value bigger than all the other Δα sample values), while the most regular topography (the width spectrum Δα = 2.6804, value lower than all the other sample values) was found in cementum. It has been concluded that multifractal analyses can be used as mathematical tools to explore the 3-D micromorphology of human canine teeth materials.
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Mozaffari N, Solaymani S, Achour A, Kulesza S, Bramowicz M, Nezafat NB, Ţălu Ş, Mozaffari N, Rezaee S. New Insights into SnO2/Al2O3, Ni/Al2O3, and SnO2/Ni/Al2O3 Composite Films for CO Adsorption: Building a Bridge between Microstructures and Adsorption Properties. THE JOURNAL OF PHYSICAL CHEMISTRY C 2020. [DOI: 10.1021/acs.jpcc.9b11148] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Nastaran Mozaffari
- Department of Environmental Engineering, Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, 1477893855 Tehran, Iran
| | - Shahram Solaymani
- School of Physics, Institute for Research in Fundamental Sciences, P.O. Box 19395-5531, 19395-5531 Tehran, Iran
| | - Amine Achour
- Research Centre in Physics of Matter and Radiation (PMR), LISE Laboratory, University of Namur, B-5000 Namur, Belgium
| | - Slawomir Kulesza
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Sloneczna 54, 10-710 Olsztyn, Poland
| | - Miroslaw Bramowicz
- Faculty of Technical Sciences, University of Warmia and Mazury in Olsztyn, Oczapowskiego 11, 10-719 Olsztyn, Poland
| | - Negin Beryani Nezafat
- School of Physics, Institute for Research in Fundamental Sciences, P.O. Box 19395-5531, 19395-5531 Tehran, Iran
| | - Ştefan Ţălu
- The Directorate of Research, Development and Innovation Management (DMCDI), Technical University of Cluj-Napoca, Constantin Daicoviciu Street No. 15, Cluj-Napoca 400020, Cluj County, Romania
| | - Niloofar Mozaffari
- Department of Physics, Faculty of Sciences, Science and Research Branch, Islamic Azad University, 1477893855 Tehran, Iran
| | - Sahar Rezaee
- Department of Physics, Kermanshah Branch, Islamic Azad University, 6718997551 Kermanshah, Iran
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Nezafat NB, Ghoranneviss M, Elahi SM, Shafiekhani A, Ghorannevis Z, Solaymani S. Topographic characterization of canine teeth using atomic force microscopy images in nano-scale. INTERNATIONAL NANO LETTERS 2019. [DOI: 10.1007/s40089-019-00284-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Abstract
The purpose of the present study was to investigate a new method to evaluate micro topography and micro morphology of hard tissue of canine teeth using an atomic force microscope (AFM). For this aim, three extracted human canine teeth were applied. The unpolished surfaces were analyzed with AFM images with 15 µm × 5 µm area and their information obtained by power spectral density (PSD) method and fast Fourier transform algorithm. It was observed that PSD analyses extract suitable information about surface morphological variations so that by moving from enamel to cementum, the fractal dimension and surface complexity were increased.
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Nezafat NB, Ghoranneviss M, Elahi SM, Shafiekhani A, Ghorannevis Z, Solaymani S. Microstructure, micromorphology, and fractal geometry of hard dental tissues: Evaluation of atomic force microscopy images. Microsc Res Tech 2019; 82:1884-1890. [DOI: 10.1002/jemt.23356] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 07/10/2019] [Accepted: 07/18/2019] [Indexed: 01/05/2023]
Affiliation(s)
- Negin B. Nezafat
- Department of Physics, Faculty of Sciences, Science and Research BranchIslamic Azad University Tehran Iran
| | - Mahmood Ghoranneviss
- Department of Physics, Faculty of Sciences, Science and Research BranchIslamic Azad University Tehran Iran
| | - Seyed M. Elahi
- Department of Physics, Faculty of Sciences, Science and Research BranchIslamic Azad University Tehran Iran
| | - Azizollah Shafiekhani
- Physics DepartmentAlzahra University Tehran Iran
- School of PhysicsInstitute for Research in Fundamental Sciences (IPM) Tehran Iran
| | | | - Shahram Solaymani
- Department of Physics, Faculty of Sciences, Science and Research BranchIslamic Azad University Tehran Iran
- School of PhysicsInstitute for Research in Fundamental Sciences (IPM) Tehran Iran
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