1
|
Jaita P, Chokethawai K, Randorn C, Boonsri K, Pringproa K, Thongkorn K, Watcharapasorn A, Jarupoom P. Enhancing bioactivity and mechanical performances of hydroxyapatite-calcium sulfate bone cements for bone repair: in vivo histological evaluation in rabbit femurs. RSC Adv 2024; 14:23286-23302. [PMID: 39049882 PMCID: PMC11268428 DOI: 10.1039/d4ra03686g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2024] [Accepted: 07/08/2024] [Indexed: 07/27/2024] Open
Abstract
This study deals with synthesizing hydroxyapatite-calcium sulfate bone cements or HAP-xCaS for bone repair. The effect of CaS on the setting time, injectability, washout resistance, phase evolution, water absorption, and physical, microstructural, and mechanical properties, as well as in vitro apatite-forming ability test and pH behavior of the HAP were investigated. Implantation of bone cement in rabbit femur and in vivo histological analysis were also analyzed. Initial and final setting times decrease with increasing CaS, which would be helpful for clinical procedures. All compositions have mixed phases of HAP, CaS, brushite, and gypsum. The prepared bone cement exhibited a dense structure and increased linear shrinkage with increasing CaS content. Adding more CaS inhibited grain growth and improved the mechanical properties, including compressive strength (σ c), bending strength (σ f), and Young's modulus (E). SEM micrographs displayed that the x = 0.7 or HAP-0.7CaS bone cement produced the highest ability to induce in vitro apatite formation, indicating its biocompatibility. In vivo histological analysis for the HAP-0.7CaS bone cement demonstrated that more new bone formed around defects and bone cement particles. Osteoblasts were found peripherally at the bone trabeculae, and occasional osteoblast-like cells were observed at the granules after 4-8 weeks of implantation. The obtained results indicated that the HAP-0.7CaS bone cement has the potential to exhibit good bioactivity, injectability, and good mechanical properties for bone repair applications.
Collapse
Affiliation(s)
- Pharatree Jaita
- Department of Physics and Materials Science, Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand
- Office of Research Administration, Chiang Mai University Chiang Mai 50200 Thailand
- Center of Excellence in Materials Science and Technology, Materials Science Research Center, Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand
| | - Komsanti Chokethawai
- Department of Physics and Materials Science, Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand
| | - Chamnan Randorn
- Department of Chemistry, Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand
| | - Kittikorn Boonsri
- Center of Veterinary Diagnosis and Technology Transfer, Faculty of Veterinary Medicine, Chiang Mai University Chiang Mai 50100 Thailand
| | | | | | - Anucha Watcharapasorn
- Department of Physics and Materials Science, Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand
- Center of Excellence in Materials Science and Technology, Materials Science Research Center, Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand
| | - Parkpoom Jarupoom
- Department of Industrial Engineering, Faculty of Engineering, Rajamangala University of Technology Lanna (RMUTL) Chiang Mai 50300 Thailand
- Materials and Medical Innovation Research Unit, Faculty of Engineering, Rajamangala University of Technology Lanna (RMUTL) Chiang Mai 50300 Thailand
| |
Collapse
|
2
|
Ciobanu CS, Predoi D, Iconaru SL, Predoi MV, Rokosz K, Raaen S, Negrila CC, Buton N, Ghegoiu L, Badea ML. Physico-Chemical and Biological Features of Fluorine-Substituted Hydroxyapatite Suspensions. MATERIALS (BASEL, SWITZERLAND) 2024; 17:3404. [PMID: 39063697 PMCID: PMC11277939 DOI: 10.3390/ma17143404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2024] [Revised: 06/28/2024] [Accepted: 07/08/2024] [Indexed: 07/28/2024]
Abstract
Infections related to orthopedic/stomatology surgery are widely recognized as a significant health concern. Therefore, the development of new materials with superior biological properties and good stability could represent a valuable alternative to the classical treatments. In this paper, the fluorine-substituted hydroxyapatite (FHAp) suspension, with the chemical formula Ca10(PO4)6(OH)2-2xF2x (where x = 0.05), was prepared using a modified coprecipitation technique. Stability studies were conducted by zeta potential and ultrasound measurements for the first time. The X-ray diffraction (XRD) patterns of FHAp powders displayed a hexagonal structure akin to that of pure hydroxyapatite (HAp). The XPS general spectrum revealed peaks corresponding to the constituent elements of fluorine-substituted hydroxyapatite such as calcium, phosphorus, oxygen, and fluorine. The purity of the obtained FHAp samples was confirmed by energy-dispersive X-ray spectroscopy (EDS) studies. The FHAp morphology was evaluated by scanning electron microscopy (SEM) measurements. Fourier-transform infrared spectroscopy (FTIR) studies were performed in order to study the vibrational properties of the FHAp samples. The FHAp suspensions were tested for antibacterial activity against reference strains such as Staphylococcus aureus 25923 ATCC, Escherichia coli ATCC 25922, and Candida albicans ATCC 10231. Additionally, the biocompatibility of the FHAp suspensions was assessed using human fetal osteoblastic cells (hFOB 1.19 cell line). The results of our biological tests suggest that FHAp suspensions are promising candidates for the future development of new biocompatible and antimicrobial agents for use in the biomedical field.
Collapse
Affiliation(s)
- Carmen Steluta Ciobanu
- National Institute of Materials Physics, Atomistilor Street, No. 405A, 077125 Magurele, Romania; (S.L.I.); (C.C.N.); (L.G.)
| | - Daniela Predoi
- National Institute of Materials Physics, Atomistilor Street, No. 405A, 077125 Magurele, Romania; (S.L.I.); (C.C.N.); (L.G.)
| | - Simona Liliana Iconaru
- National Institute of Materials Physics, Atomistilor Street, No. 405A, 077125 Magurele, Romania; (S.L.I.); (C.C.N.); (L.G.)
| | - Mihai Valentin Predoi
- Department of Mechanics, University Politehnica of Bucharest, BN 002, 313 Splaiul Independentei, Sector 6, 060042 Bucharest, Romania;
| | - Krzysztof Rokosz
- Faculty of Electronics and Computer Science, Koszalin University of Technology, Sniadeckich 2, PL 75-453 Koszalin, Poland;
| | - Steinar Raaen
- Department of Physics, Norwegian University of Science and Technology (NTNU), Realfagbygget E3-124 Høgskoleringen 5, NO 7491 Trondheim, Norway;
| | - Catalin Constantin Negrila
- National Institute of Materials Physics, Atomistilor Street, No. 405A, 077125 Magurele, Romania; (S.L.I.); (C.C.N.); (L.G.)
| | - Nicolas Buton
- HORIBA Jobin Yvon S.A.S., 6–18, Rue du Canal, 91165 Longjumeau CEDEX, France;
| | - Liliana Ghegoiu
- National Institute of Materials Physics, Atomistilor Street, No. 405A, 077125 Magurele, Romania; (S.L.I.); (C.C.N.); (L.G.)
| | - Monica Luminita Badea
- Faculty of Horticulture, University of Agronomic Sciences and Veterinary Medicine, 59 Marasti Blvd., 011464 Bucharest, Romania;
| |
Collapse
|
3
|
Balas M, Badea MA, Ciobanu SC, Piciu F, Iconaru SL, Dinischiotu A, Predoi D. Biocompatibility and Osteogenic Activity of Samarium-Doped Hydroxyapatite-Biomimetic Nanoceramics for Bone Regeneration Applications. Biomimetics (Basel) 2024; 9:309. [PMID: 38921189 PMCID: PMC11201808 DOI: 10.3390/biomimetics9060309] [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: 03/18/2024] [Revised: 05/18/2024] [Accepted: 05/20/2024] [Indexed: 06/27/2024] Open
Abstract
In this study, we report on the development of hydroxyapatite (HAp) and samarium-doped hydroxyapatite (SmHAp) nanoparticles using a cost-effective method and their biological effects on a bone-derived cell line MC3T3-E1. The physicochemical and biological features of HAp and SmHAp nanoparticles are explored. The X-ray diffraction (XRD) studies revealed that no additional peaks were observed after the integration of samarium (Sm) ions into the HAp structure. Valuable information regarding the molecular structure and morphological features of nanoparticles were obtained by using Fourier-transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The elemental composition obtained by using energy-dispersive X-ray spectroscopy (EDS) confirmed the presence of the HAp constituent elements, Ca, O, and P, as well as the presence and uniform distribution of Sm3+ ions. Both HAp and SmHAp nanoparticles demonstrated biocompatibility at concentrations below 25 μg/mL and 50 μg/mL, respectively, for up to 72 h of exposure. Cell membrane integrity was preserved following treatment with concentrations up to 100 μg/mL HAp and 400 μg/mL SmHAp, confirming the role of Sm3+ ions in enhancing the cytocompatibility of HAp. Furthermore, our findings reveal a positive, albeit limited, effect of SmHAp nanoparticles on the actin dynamics, osteogenesis, and cell migration compared to HAp nanoparticles. Importantly, the biological results highlight the potential role of Sm3+ ions in maintaining cellular balance by mitigating disruptions in Ca2+ homeostasis induced by HAp nanoparticles. Therefore, our study represents a significant contribution to the safety assessment of both HAp and SmHAp nanoparticles for biomedical applications focused on bone regeneration.
Collapse
Affiliation(s)
- Mihaela Balas
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, 91-95 Splaiul Independentei, 050095 Bucharest, Romania; (M.B.); (M.A.B.)
| | - Madalina Andreea Badea
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, 91-95 Splaiul Independentei, 050095 Bucharest, Romania; (M.B.); (M.A.B.)
| | - Steluta Carmen Ciobanu
- National Institute of Materials Physics, No. 405A Atomistilor Street, 077125 Magurele, Romania; (S.C.C.); (S.L.I.); (D.P.)
| | - Florentina Piciu
- Department of Anatomy, Animal Physiology and Biophysics, Faculty of Biology, University of Bucharest, 91-95 Splaiul Independentei, 050095 Bucharest, Romania;
| | - Simona Liliana Iconaru
- National Institute of Materials Physics, No. 405A Atomistilor Street, 077125 Magurele, Romania; (S.C.C.); (S.L.I.); (D.P.)
| | - Anca Dinischiotu
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, 91-95 Splaiul Independentei, 050095 Bucharest, Romania; (M.B.); (M.A.B.)
| | - Daniela Predoi
- National Institute of Materials Physics, No. 405A Atomistilor Street, 077125 Magurele, Romania; (S.C.C.); (S.L.I.); (D.P.)
| |
Collapse
|
4
|
Bauso LV, La Fauci V, Longo C, Calabrese G. Bone Tissue Engineering and Nanotechnology: A Promising Combination for Bone Regeneration. BIOLOGY 2024; 13:237. [PMID: 38666849 PMCID: PMC11048357 DOI: 10.3390/biology13040237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 03/27/2024] [Accepted: 03/29/2024] [Indexed: 04/28/2024]
Abstract
Large bone defects are the leading contributor to disability worldwide, affecting approximately 1.71 billion people. Conventional bone graft treatments show several disadvantages that negatively impact their therapeutic outcomes and limit their clinical practice. Therefore, much effort has been made to devise new and more effective approaches. In this context, bone tissue engineering (BTE), involving the use of biomaterials which are able to mimic the natural architecture of bone, has emerged as a key strategy for the regeneration of large defects. However, although different types of biomaterials for bone regeneration have been developed and investigated, to date, none of them has been able to completely fulfill the requirements of an ideal implantable material. In this context, in recent years, the field of nanotechnology and the application of nanomaterials to regenerative medicine have gained significant attention from researchers. Nanotechnology has revolutionized the BTE field due to the possibility of generating nanoengineered particles that are able to overcome the current limitations in regenerative strategies, including reduced cell proliferation and differentiation, the inadequate mechanical strength of biomaterials, and poor production of extrinsic factors which are necessary for efficient osteogenesis. In this review, we report on the latest in vitro and in vivo studies on the impact of nanotechnology in the field of BTE, focusing on the effects of nanoparticles on the properties of cells and the use of biomaterials for bone regeneration.
Collapse
Affiliation(s)
- Luana Vittoria Bauso
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno d’Alcontres, 31, 98168 Messina, Italy; (V.L.F.); (C.L.)
| | | | | | - Giovanna Calabrese
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno d’Alcontres, 31, 98168 Messina, Italy; (V.L.F.); (C.L.)
| |
Collapse
|
5
|
Jiang C, Sun Y, Li G, Zhou T, Wang Q, Zhang J, Song Y, Xu W, A L. Magnetic Hydroxyapatite-Coated Iron-Chromium Microspheres for Dental Surface Polishing and Plaque Removal. ACS APPLIED MATERIALS & INTERFACES 2024; 16:5554-5567. [PMID: 38278767 DOI: 10.1021/acsami.3c16398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2024]
Abstract
This research aimed to engineer magnetic hydroxyapatite-coated iron-chromium (HAp-FeCr) microspheres to enhance dental surface polishing and plaque elimination. Utilizing a tailored sol-gel approach, the HAp-FeCr microspheres were synthesized and exhaustively characterized via scanning electron microscopy, energy-dispersive X-ray spectroscopy, ζ-potential, X-ray diffractometry, and X-ray photoelectron spectroscopy methodologies. Key findings showcased that these microspheres retained their magnetic properties post-HAp coating, as evidenced by the magnetization curves. An innovative magnetic polishing system was developed, incorporating these microspheres and a 2000 rpm magnet. Comparative evaluations between traditional air-powder polishing and the proposed magnetic technique demonstrated the latter's superiority. Notably, the magnetic polishing led to a substantial reduction in dental plaque on the tooth surface, decreasing bacterial adhesion and early biofilm formation by Streptococcus gordonii and Lactobacillus acidophilus, where the most pronounced effects were observed in samples with elevated HAp content. A significant 60% reduction in dental plaque was achieved with the magnetic method relative to air-powder polishing. Furthermore, the HAp-FeCr microspheres' biocompatibility was verified through cytotoxicity tests and animal studies. In essence, the magnetic HAp-FeCr microspheres present a novel and efficient strategy for dental treatments, holding immense potential for improving oral health.
Collapse
Affiliation(s)
- Cong Jiang
- Department of Oral Implantology, School and Hospital of Stomatology, Jilin University, Changchun 130021, China
| | - Yue Sun
- Department of Oral Implantology, School and Hospital of Stomatology, Jilin University, Changchun 130021, China
- Jilin Provincial Key Laboratory of Sciences and Technology for Stomatology Nanoengineering, Changchun 130021, China
| | - Gaojie Li
- Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130021, China
| | - Tianyu Zhou
- Department of Oral Implantology, School and Hospital of Stomatology, Jilin University, Changchun 130021, China
| | - Qiqi Wang
- Department of Periodontology, School and Hospital of Stomatology, Jilin University, Changchun 130021, China
| | - Jingdan Zhang
- Department of Periodontology, School and Hospital of Stomatology, Jilin University, Changchun 130021, China
| | - Yulai Song
- Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130021, China
| | - Wenzhou Xu
- Department of Periodontology, School and Hospital of Stomatology, Jilin University, Changchun 130021, China
- Jilin Provincial Key Laboratory of Sciences and Technology for Stomatology Nanoengineering, Changchun 130021, China
| | - Lan A
- Department of Oral Implantology, School and Hospital of Stomatology, Jilin University, Changchun 130021, China
- Jilin Provincial Key Laboratory of Sciences and Technology for Stomatology Nanoengineering, Changchun 130021, China
| |
Collapse
|
6
|
Jebapriya M, Venkatesan R, Ansar S, Kim SC. Enhancement of physicochemical characterization of nanocomposites on Ag +/Fe 2+ codoped hydroxyapatite for antibacterial and anticancer properties. Colloids Surf B Biointerfaces 2023; 229:113463. [PMID: 37481804 DOI: 10.1016/j.colsurfb.2023.113463] [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] [Received: 05/06/2023] [Revised: 07/13/2023] [Accepted: 07/16/2023] [Indexed: 07/25/2023]
Abstract
The synthesis of nanosized Ag+/Fe2+ codoped hydroxyapatite (HAp) nanocomposite materials with antibacterial and anticancer characteristics is highly attractive for advancing the development of biological applications. The objective of this study was to evaluate the antibacterial and anticancer characteristics of Ag+/Fe2+ codoped hydroxyapatite materials. We developed a facile chemical precipitation method for the fabrication of Ag+/Fe2+:HAp nanocomposites. The developed Ag+/Fe2+:HAp nanocomposite materials were characterized with Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), Raman spectroscopy, and transmission electron microscopy (TEM). For measuring the size of Ag+/Fe2+:HAp nanocomposites, dynamic light scattering (DLS) is an advantageous method. The chemical states and chemical composition of Ag+/Fe2+:HAp were observed by X-ray photoelectron spectroscopy (XPS) analysis. In addition, the antibacterial efficacy of Ag+/Fe2+:HAps against Gram-positive (S.aureus), and Gram-negative (S.typhi, and E.Coli) microorganisms is examined in this current study. Ag+/Fe2+:HAp nanocomposite materials have been evaluated for biological toxicity in vitro, and the results showed that the particles were excellent at identifying and killing cancer cells. In this respect, Ag+/Fe2+:HAp nanocomposites significantly impact human colon cancer cells (HT29) while have no effect on normal fibroblast cells (L929).
Collapse
Affiliation(s)
- M Jebapriya
- Department of Chemistry, Mar Ephraem College of Engineering and Technology, Elavuvillai, Marthandam, Tamil Nadu 629171, India
| | - Raja Venkatesan
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, Republic of Korea.
| | - Sabah Ansar
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia
| | - Seong-Cheol Kim
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, Republic of Korea.
| |
Collapse
|
7
|
Filip DG, Surdu VA, Paduraru AV, Andronescu E. Current Development in Biomaterials-Hydroxyapatite and Bioglass for Applications in Biomedical Field: A Review. J Funct Biomater 2022; 13:jfb13040248. [PMID: 36412889 PMCID: PMC9680477 DOI: 10.3390/jfb13040248] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/11/2022] [Accepted: 11/14/2022] [Indexed: 11/18/2022] Open
Abstract
Inorganic biomaterials, including different types of metals and ceramics are widely used in various fields due to their biocompatibility, bioactivity, and bioresorbable capacity. In recent years, biomaterials have been used in biomedical and biological applications. Calcium phosphate (CaPs) compounds are gaining importance in the field of biomaterials used as a standalone material or in more complex structures, especially for bone substitutes and drug delivery systems. The use of multiple dopants into the structure of CaPs compounds can significantly improve their in vivo and in vitro activity. Among the general information included in the Introduction section, in the first section of this review paper, the authors provided a background on the development of hydroxyapatite, methods of synthesis, and its applications. The advantages of using different ions and co-ions for substitution into the hydroxyapatite lattice and their influence on physicochemical, antibacterial, and biological properties of hydroxyapatite are also presented in this section of the review paper. Larry Hench's 45S5 Bioglass®, commercially named 45S5, was the first bioactive glass that revealed a chemical bond with bone, highlighting the potential of this biomaterial to be widely used in biomedicine for bone regeneration. The second section of this article is focused on the development and current products based on 45S5 Bioglass®, covering the historical evolution, importance of the sintering method, hybrid bioglass composites, and applications. To overcome the limitations of the original biomaterials, studies were performed to combine hydroxyapatite and 45S5 Bioglass® into new composites used for their high bioactivity and improved properties. This particular type of combined hydroxyapatite/bioglass biomaterial is discussed in the last section of this review paper.
Collapse
Affiliation(s)
- Diana Georgiana Filip
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 060042 Bucharest, Romania
| | - Vasile-Adrian Surdu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 060042 Bucharest, Romania
- National Centre for Micro and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
- Correspondence:
| | - Andrei Viorel Paduraru
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 060042 Bucharest, Romania
| | - Ecaterina Andronescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 060042 Bucharest, Romania
- National Centre for Micro and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
- Academy of Romanian Scientists, 50085 Bucharest, Romania
| |
Collapse
|
8
|
Iconaru SL, Ciobanu CS, Predoi G, Rokosz K, Chifiriuc MC, Bleotu C, Stanciu G, Hristu R, Raaen S, Raita SM, Ghegoiu L, Badea ML, Predoi D. Biological and Physico-Chemical Properties of Composite Layers Based on Magnesium-Doped Hydroxyapatite in Chitosan Matrix. MICROMACHINES 2022; 13:1574. [PMID: 36295927 PMCID: PMC9608974 DOI: 10.3390/mi13101574] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/13/2022] [Accepted: 09/19/2022] [Indexed: 06/16/2023]
Abstract
In the present study, we report the development and characterization of composite layers (by spin coating) based on magnesium-doped hydroxyapatite in a chitosan matrix, (Ca10-xMgx(PO4)6(OH)2; xMg = 0, 0.08 and 0.3; HApCh, 8MgHApCh and 30MgHApCh). The MgHApCh composite layers were investigated using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS) techniques. The in vitro biological evaluation included the assessment of their cytotoxicity on MG63 osteoblast-like cells and antifungal activity against Candida albicans ATCC 10231 fungal cell lines. The results of the physico-chemical characterization highlighted the obtaining of uniform and homogeneous composite layers. In addition, the biological assays demonstrated that the increase in the magnesium concentration in the samples enhanced the antifungal effect but also decreased their cytocompatibility. However, for certain optimal magnesium ion concentrations, the composite layers presented both excellent biocompatibility and antifungal properties, suggesting their promising potential for biomedical applications in both implantology and dentistry.
Collapse
Affiliation(s)
- Simona Liliana Iconaru
- National Institute of Materials Physics, 405A Atomistilor Street, 077125 Magurele, Romania
| | - Carmen Steluta Ciobanu
- National Institute of Materials Physics, 405A Atomistilor Street, 077125 Magurele, Romania
| | - Gabriel Predoi
- Faculty of Veterinary Medicine, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 105 Splaiul Independentei, 050097 Bucharest, Romania
| | - Krzysztof Rokosz
- Faculty of Electronics and Computer Science, Koszalin University of Technology, Sniadeckich 2, PL 75-453 Koszalin, Poland
| | - Mariana Carmen Chifiriuc
- Life, Environmental and Earth Sciences Division, Research Institute of the University of Bucharest (ICUB), University of Bucharest, 060023 Bucharest, Romania
- Academy of Romanian Scientists, 54 Splaiul Independentei Street, 050085 Bucharest, Romania
- Biological Sciences Division, The Romanian Academy, 25 Calea Victoriei, 010071 Bucharest, Romania
| | - Coralia Bleotu
- Life, Environmental and Earth Sciences Division, Research Institute of the University of Bucharest (ICUB), University of Bucharest, 060023 Bucharest, Romania
- Stefan Nicolau Virology Institute, 285 Mihai Bravu Avenue, 030304 Bucharest, Romania
| | - George Stanciu
- Center for Microscopy-Microanalysis and Information Processing, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
| | - Radu Hristu
- Center for Microscopy-Microanalysis and Information Processing, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
| | - Steinar Raaen
- Department of Physics, Norwegian University of Science and Technology (NTNU), Realfagbygget E3-124 Høgskoleringen 5, NO 7491 Trondheim, Norway
| | - Stefania Mariana Raita
- Faculty of Veterinary Medicine, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 105 Splaiul Independentei, 050097 Bucharest, Romania
| | - Liliana Ghegoiu
- National Institute of Materials Physics, 405A Atomistilor Street, 077125 Magurele, Romania
| | - Monica Luminita Badea
- National Institute of Materials Physics, 405A Atomistilor Street, 077125 Magurele, Romania
- Faculty of Horticulture, University of Agronomic Sciences and Veterinary Medicine, 59 Marasti Boulevard, 011464 Bucharest, Romania
| | - Daniela Predoi
- National Institute of Materials Physics, 405A Atomistilor Street, 077125 Magurele, Romania
| |
Collapse
|
9
|
Surface and Structural Studies of Age-Related Changes in Dental Enamel: An Animal Model. MATERIALS 2022; 15:ma15113993. [PMID: 35683290 PMCID: PMC9182525 DOI: 10.3390/ma15113993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/26/2022] [Accepted: 06/01/2022] [Indexed: 01/28/2023]
Abstract
In the animal kingdom, continuously erupting incisors provided an attractive model for studying the enamel matrix and mineral composition of teeth during development. Enamel, the hardest mineral tissue in the vertebrates, is a tissue sensitive to external conditions, reflecting various disturbances in its structure. The developing dental enamel was monitored in a series of incisor samples extending the first four weeks of postnatal life in the spiny mouse. The age-dependent changes in enamel surface morphology in the micrometre and nanometre-scale and a qualitative assessment of its mechanical features were examined by applying scanning electron microscopy (SEM) and atomic force microscopy (AFM). At the same time, structural studies using XRD and vibrational spectroscopy made it possible to assess crystallinity and carbonate content in enamel mineral composition. Finally, a model for predicting the maturation based on chemical composition and structural factors was constructed using artificial neural networks (ANNs). The research presented here can extend the existing knowledge by proposing a pattern of enamel development that could be used as a comparative material in environmental, nutritional, and pharmaceutical research.
Collapse
|
10
|
Amirtharaj Mosas KK, Chandrasekar AR, Dasan A, Pakseresht A, Galusek D. Recent Advancements in Materials and Coatings for Biomedical Implants. Gels 2022; 8:323. [PMID: 35621621 PMCID: PMC9140433 DOI: 10.3390/gels8050323] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 05/17/2022] [Accepted: 05/18/2022] [Indexed: 11/16/2022] Open
Abstract
Metallic materials such as stainless steel (SS), titanium (Ti), magnesium (Mg) alloys, and cobalt-chromium (Co-Cr) alloys are widely used as biomaterials for implant applications. Metallic implants sometimes fail in surgeries due to inadequate biocompatibility, faster degradation rate (Mg-based alloys), inflammatory response, infections, inertness (SS, Ti, and Co-Cr alloys), lower corrosion resistance, elastic modulus mismatch, excessive wear, and shielding stress. Therefore, to address this problem, it is necessary to develop a method to improve the biofunctionalization of metallic implant surfaces by changing the materials' surface and morphology without altering the mechanical properties of metallic implants. Among various methods, surface modification on metallic surfaces by applying coatings is an effective way to improve implant material performance. In this review, we discuss the recent developments in ceramics, polymers, and metallic materials used for implant applications. Their biocompatibility is also discussed. The recent trends in coatings for biomedical implants, applications, and their future directions were also discussed in detail.
Collapse
Affiliation(s)
| | - Ashok Raja Chandrasekar
- Centre for Functional and Surface-Functionalized Glass, Alexander Dubcek University of Trencín, 911 50 Trencín, Slovakia; (A.D.); (A.P.)
| | - Arish Dasan
- Centre for Functional and Surface-Functionalized Glass, Alexander Dubcek University of Trencín, 911 50 Trencín, Slovakia; (A.D.); (A.P.)
| | - Amirhossein Pakseresht
- Centre for Functional and Surface-Functionalized Glass, Alexander Dubcek University of Trencín, 911 50 Trencín, Slovakia; (A.D.); (A.P.)
| | - Dušan Galusek
- Centre for Functional and Surface-Functionalized Glass, Alexander Dubcek University of Trencín, 911 50 Trencín, Slovakia; (A.D.); (A.P.)
- Joint Glass Centre of the IIC SAS, TnUAD, and FChFT STU, FunGlass, Alexander Dubcek University of Trencín, 911 50 Trencín, Slovakia
| |
Collapse
|
11
|
Burdușel AC, Gherasim O, Andronescu E, Grumezescu AM, Ficai A. Inorganic Nanoparticles in Bone Healing Applications. Pharmaceutics 2022; 14:770. [PMID: 35456604 PMCID: PMC9027776 DOI: 10.3390/pharmaceutics14040770] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 03/24/2022] [Accepted: 03/28/2022] [Indexed: 12/13/2022] Open
Abstract
Modern biomedicine aims to develop integrated solutions that use medical, biotechnological, materials science, and engineering concepts to create functional alternatives for the specific, selective, and accurate management of medical conditions. In the particular case of tissue engineering, designing a model that simulates all tissue qualities and fulfills all tissue requirements is a continuous challenge in the field of bone regeneration. The therapeutic protocols used for bone healing applications are limited by the hierarchical nature and extensive vascularization of osseous tissue, especially in large bone lesions. In this regard, nanotechnology paves the way for a new era in bone treatment, repair and regeneration, by enabling the fabrication of complex nanostructures that are similar to those found in the natural bone and which exhibit multifunctional bioactivity. This review aims to lay out the tremendous outcomes of using inorganic nanoparticles in bone healing applications, including bone repair and regeneration, and modern therapeutic strategies for bone-related pathologies.
Collapse
Affiliation(s)
- Alexandra-Cristina Burdușel
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1–7 Gheorghe Polizu Street, 011061 Bucharest, Romania; (A.-C.B.); (O.G.); (A.M.G.); (A.F.)
| | - Oana Gherasim
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1–7 Gheorghe Polizu Street, 011061 Bucharest, Romania; (A.-C.B.); (O.G.); (A.M.G.); (A.F.)
- Lasers Department, National Institute for Lasers, Plasma and Radiation Physics, 409 Atomiștilor Street, 077125 Magurele, Romania
| | - Ecaterina Andronescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1–7 Gheorghe Polizu Street, 011061 Bucharest, Romania; (A.-C.B.); (O.G.); (A.M.G.); (A.F.)
- Academy of Romanian Scientists, 3 Ilfov Street, 050044 Bucharest, Romania
| | - Alexandru Mihai Grumezescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1–7 Gheorghe Polizu Street, 011061 Bucharest, Romania; (A.-C.B.); (O.G.); (A.M.G.); (A.F.)
- Academy of Romanian Scientists, 3 Ilfov Street, 050044 Bucharest, Romania
- Research Institute of the University of Bucharest—ICUB, University of Bucharest, 90–92 Panduri Road, 050657 Bucharest, Romania
| | - Anton Ficai
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1–7 Gheorghe Polizu Street, 011061 Bucharest, Romania; (A.-C.B.); (O.G.); (A.M.G.); (A.F.)
- Academy of Romanian Scientists, 3 Ilfov Street, 050044 Bucharest, Romania
| |
Collapse
|
12
|
Physicochemical Characterization of Europium-Doped Hydroxyapatite Thin Films with Antifungal Activity. COATINGS 2022. [DOI: 10.3390/coatings12030306] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Owing to its unique biological and physicochemical properties, hydroxyapatite (HAp) represents one of the most extensively studied biomaterials for biomedical applications. It is well known that Candida is currently one of the fungi frequently involved in the onset and development of post-implant infections and, owing to the appearance of antifungal resistance, it is quite difficult to treat despite all the tremendous efforts made in this regard by the scientific world. Therefore, in this context, we report for the first time in this paper, the development and characterization of europium-doped thin films (5EuHAp, xEu = 0.05) on a Si substrate by a spin-coating method. The results of ultrasound (US), zeta (ζ) potential, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and Fourier-transform infrared spectroscopy (FTIR) studies are presented. The XRD studies conducted on 5EuHAp suspension revealed the nanometric dimensions of the particles and sample purity. In addition, a moderate stability of the 5EuHAp suspension was observed. XPS measurements revealed the presence of Eu 3d in the 5EuHAp thin films. In the SEM micrographs, the surface uniformity and the absence of the surface defects could be observed. Moreover, the results of the FTIR studies showed the presence of the vibrational bands specific to the HAp structure in the studied sample. The antifungal activity of the HAp and 5EuHAp suspensions and coatings was evaluated using the Candida albicans ATCC 10231 (C. albicans) fungal strain. The qualitative assays of the antifungal properties of HAp and 5EuHAp coatings were also visualized by SEM and CLSM. The antifungal studies revealed that both 5EuHAp suspensions and coatings exhibited noticeable antifungal activity against C. albicans cells.
Collapse
|
13
|
Zhao X, Zhu L, Fan C. Sequential alendronate delivery by hydroxyapatite-coated maghemite for enhanced bone fracture healing. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102761] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
14
|
Sneha KR, Sailaja GS. Intrinsically radiopaque biomaterial assortments: a short review on the physical principles, X-ray imageability, and state-of-the-art developments. J Mater Chem B 2021; 9:8569-8593. [PMID: 34585717 DOI: 10.1039/d1tb01513c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
X-ray attenuation ability, otherwise known as radiopacity of a material, could be indisputably tagged as the central and decisive parameter that produces contrast in an X-ray image. Radiopaque biomaterials are vital in the healthcare sector that helps clinicians to track them unambiguously during pre and post interventional radiological procedures. Medical imaging is one of the most powerful resources in the diagnostic sector that aids improved treatment outcomes for patients. Intrinsically radiopaque biomaterials enable themselves for visual targeting/positioning as well as to monitor their fate and further provide the radiologists with critical insights about the surgical site. Moreover, the emergence of advanced real-time imaging modalities is a boon to the contemporary healthcare systems that allow to perform minimally invasive surgical procedures and thereby reduce the healthcare costs and minimize patient trauma. X-ray based imaging is one such technologically upgraded diagnostic tool with many variants like digital X-ray, computed tomography, digital subtraction angiography, and fluoroscopy. In light of these facts, this review is aimed to briefly consolidate the physical principles of X-ray attenuation by a radiopaque material, measurement of radiopacity, classification of radiopaque biomaterials, and their recent advanced applications.
Collapse
Affiliation(s)
- K R Sneha
- Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology, Kochi - 682022, India.
| | - G S Sailaja
- Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology, Kochi - 682022, India. .,Interuniversity Centre for Nanomaterials and Devices, CUSAT, Kochi - 682022, India.,Centre for Advanced Materials, CUSAT, Kochi - 682022, India
| |
Collapse
|
15
|
Ruffini A, Sandri M, Dapporto M, Campodoni E, Tampieri A, Sprio S. Nature-Inspired Unconventional Approaches to Develop 3D Bioceramic Scaffolds with Enhanced Regenerative Ability. Biomedicines 2021; 9:916. [PMID: 34440120 PMCID: PMC8389705 DOI: 10.3390/biomedicines9080916] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 07/21/2021] [Accepted: 07/23/2021] [Indexed: 12/13/2022] Open
Abstract
Material science is a relevant discipline in support of regenerative medicine. Indeed, tissue regeneration requires the use of scaffolds able to guide and sustain the natural cell metabolism towards tissue regrowth. This need is particularly important in musculoskeletal regeneration, such as in the case of diseased bone or osteocartilaginous regions for which calcium phosphate-based scaffolds are considered as the golden solution. However, various technological barriers related to conventional ceramic processing have thus far hampered the achievement of biomimetic and bioactive scaffolds as effective solutions for still unmet clinical needs in orthopaedics. Driven by such highly impacting socioeconomic needs, new nature-inspired approaches promise to make a technological leap forward in the development of advanced biomaterials. The present review illustrates ion-doped apatites as biomimetic materials whose bioactivity resides in their unstable chemical composition and nanocrystallinity, both of which are, however, destroyed by the classical sintering treatment. In the following, recent nature-inspired methods preventing the use of high-temperature treatments, based on (i) chemically hardening bioceramics, (ii) biomineralisation process, and (iii) biomorphic transformations, are illustrated. These methods can generate products with advanced biofunctional properties, particularly biomorphic transformations represent an emerging approach that could pave the way to a technological leap forward in medicine and also in various other application fields.
Collapse
Affiliation(s)
| | | | | | | | - Anna Tampieri
- Institute of Science and Technology for Ceramics, National Research Council, 48018 Faenza, Italy; (A.R.); (M.S.); (M.D.); (E.C.)
| | - Simone Sprio
- Institute of Science and Technology for Ceramics, National Research Council, 48018 Faenza, Italy; (A.R.); (M.S.); (M.D.); (E.C.)
| |
Collapse
|
16
|
Predoi G, Ciobanu CS, Iconaru SL, Predoi D, Dreghici DB, Groza A, Barbuceanu F, Cimpeanu C, Badea ML, Barbuceanu SF, Furnaris CF, Belu C, Ghegoiu L, Raita MS. Preparation and Characterization of Dextran Coated Iron Oxide Nanoparticles Thin Layers. Polymers (Basel) 2021; 13:polym13142351. [PMID: 34301108 PMCID: PMC8309556 DOI: 10.3390/polym13142351] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/13/2021] [Accepted: 07/16/2021] [Indexed: 01/15/2023] Open
Abstract
In the present study, we report the synthesis of a dextran coated iron oxide nanoparticles (DIO-NPs) thin layer on glass substrate by an adapted method. The surface morphology of the obtained samples was analyzed by Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), optical, and metallographic microscopies. In addition, the distribution of the chemical elements into the DIO-NPs thin layer was analyzed by Glow Discharge Optical Emission Spectrometry (GDOES). Furthermore, the chemical bonds formed between the dextran and iron oxide nanoparticles was investigated by Fourier Transform Infrared Spectroscopy (FTIR). Additionally, the HepG2 viability incubated with the DIO-NPs layers was evaluated at different time intervals using MTT (3-(4, 5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay. The goal of this study was to obtain a DIO-NPs thin layer which could be used as a coating for medical devices such as microfluidic channel, microchips, and catheter. The results of the surface morphology investigations conducted on DIO-NPs thin layer suggests the presence of a continuous and homogeneous layer. In addition, the GDOES results indicate the presence of C, H, Fe, and O signal intensities characteristic to the DIO-NPs layers. The presence in the IR spectra of the Fe-CO metal carbonyl vibration bonds prove that the linkage between iron oxide nanoparticles and dextran take place through carbon–oxygen bonds. The cytotoxicity assays highlighted that HepG2 cells morphology did not show any noticeable modifications after being incubated with DIO-NPs layers. In addition, the MTT assay suggested that the DIO-NPs layers did not present any toxic effects towards HEpG2 cells.
Collapse
Affiliation(s)
- Gabriel Predoi
- Faculty of Veterinary Medicine, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 105 Splaiul Independentei, Sector 5, 050097 Bucharest, Romania; (F.B.); (C.F.F.); (C.B.)
- Correspondence: (G.P.); (C.S.C.); (M.S.R.)
| | - Carmen Steluta Ciobanu
- Multifunctional Materials and Structures Laboratory, National Institute of Materials Physics, Atomistilor Street, No. 405A, P.O. Box MG 07, 077125 Magurele, Romania; (S.L.I.); (D.P.); (M.-L.B.); (L.G.)
- Correspondence: (G.P.); (C.S.C.); (M.S.R.)
| | - Simona Liliana Iconaru
- Multifunctional Materials and Structures Laboratory, National Institute of Materials Physics, Atomistilor Street, No. 405A, P.O. Box MG 07, 077125 Magurele, Romania; (S.L.I.); (D.P.); (M.-L.B.); (L.G.)
| | - Daniela Predoi
- Multifunctional Materials and Structures Laboratory, National Institute of Materials Physics, Atomistilor Street, No. 405A, P.O. Box MG 07, 077125 Magurele, Romania; (S.L.I.); (D.P.); (M.-L.B.); (L.G.)
| | - Dragana Biliana Dreghici
- Low Temperature Plasma Laboratory, National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, P.O. Box MG 36, 077125 Magurele, Romania; (D.B.D.); (A.G.)
| | - Andreea Groza
- Low Temperature Plasma Laboratory, National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, P.O. Box MG 36, 077125 Magurele, Romania; (D.B.D.); (A.G.)
| | - Florica Barbuceanu
- Faculty of Veterinary Medicine, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 105 Splaiul Independentei, Sector 5, 050097 Bucharest, Romania; (F.B.); (C.F.F.); (C.B.)
- Institute for Diagnosis and Animal Health, 63 Staicovici D. Nicolae, Street, 50557 Bucharest, Romania
| | - Carmen Cimpeanu
- Faculty of Land Reclamation and Environmental Engineering, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 59 Marasti Blvd, Sector 1, 011464 Bucharest, Romania;
| | - Monica-Luminita Badea
- Multifunctional Materials and Structures Laboratory, National Institute of Materials Physics, Atomistilor Street, No. 405A, P.O. Box MG 07, 077125 Magurele, Romania; (S.L.I.); (D.P.); (M.-L.B.); (L.G.)
- Faculty of Horticulture, University of Agronomic Sciences and Veterinary Medicine, 59 Marasti Blvd., 011464 Bucharest, Romania
| | - Stefania-Felicia Barbuceanu
- Organic Chemistry Department, Faculty of Pharmacy, University of Medicine and Pharmacy, Traian Vuia Street 6, 020956 Bucharest, Romania;
| | - Ciprian Florin Furnaris
- Faculty of Veterinary Medicine, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 105 Splaiul Independentei, Sector 5, 050097 Bucharest, Romania; (F.B.); (C.F.F.); (C.B.)
| | - Cristian Belu
- Faculty of Veterinary Medicine, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 105 Splaiul Independentei, Sector 5, 050097 Bucharest, Romania; (F.B.); (C.F.F.); (C.B.)
| | - Liliana Ghegoiu
- Multifunctional Materials and Structures Laboratory, National Institute of Materials Physics, Atomistilor Street, No. 405A, P.O. Box MG 07, 077125 Magurele, Romania; (S.L.I.); (D.P.); (M.-L.B.); (L.G.)
| | - Mariana Stefania Raita
- Faculty of Veterinary Medicine, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 105 Splaiul Independentei, Sector 5, 050097 Bucharest, Romania; (F.B.); (C.F.F.); (C.B.)
- Correspondence: (G.P.); (C.S.C.); (M.S.R.)
| |
Collapse
|