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Özmeriç N, Çakal GÖ, Gökmenoğlu C, Özmeriç A, Oduncuoğlu BF, Hacaloğlu T, Kaftanoğlu B. Histomorphometric and biomechanical evaluation of the osseointegration around micro- and nano-level boron-nitride coated titanium dental implants. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2022; 123:e694-e700. [PMID: 35724866 DOI: 10.1016/j.jormas.2022.06.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 06/08/2022] [Accepted: 06/16/2022] [Indexed: 10/18/2022]
Abstract
INTRODUCTION Titanium dental implants has been coated with different materials such as polymers and biomimetic agents, bone morphogenetic protein, calcium phosphate to enhance surface properties of the titanium implants for osseointegration. The aim of this study was to evaluate the bone tissue healing around Boron Nitride-coated (BN-coated) titanium implants histomorphometrically and biomechanically and also observe the effect of different coating thicknesses on osseointegration. MATERIALS AND METHODS BN was coated on dental titanium implants with two different coating thicknesses by using RF magnetron sputtering system. Totally fifty-four implants were inserted into the tibias' of 12 New Zealand rabbits bilaterally under general anesthesia. All animals were sacrificed after 4-weeks. Bone-implant contact (BIC) and new bone area/total area ratios (BATA) were calculated. Also, the removal torque (RT) test was performed. RESULTS The highest new bone area in the medullary cavity was around the nano-BN-coated surface with 15.70%. In micro-BN-coated surface and control group, this ratio was determined as 10.48% and 8.23%, respectively. The BIC ratios in upper-side of implants and cortical-associated BIC ratios in lower-side were found significantly higher in control and micro-BN-coated group than nano-BN-coated group (p < 0.05). Similar BIC values were observed between control and micro-BN-coated groups (p > 0.05). BATA values did not show statistically significant differences between all three groups (p > 0.05). The RT values measured in all groups were found comparable and no statistically significant differences were found (p > 0.05). CONCLUSION No inflammatory reaction developed around any implant. Relatively more new bone formation around nano-BN-coated titanium implants indicates the promising osseoinductive effect of BN coating. BN-coated implants showed similar biomechanical and histomorphometrical outcomes to that of the conventional titanium implants through a 4-week evaluation period.
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Affiliation(s)
- Nurdan Özmeriç
- Department of Periodontology, Faculty of Dentistry, Gazi University, Bişkek Caddesi, 06510 Ankara, Turkey
| | - Gaye Özgür Çakal
- Institute of Nuclear Sciences, Ankara University, Tandoğan Campus, 06100 Ankara, Turkey
| | - Ceren Gökmenoğlu
- Department of Periodontology, Faculty of Dentistry, Ordu University, 52100, Ordu, Turkey.
| | - Ahmet Özmeriç
- Department of Orthopedics and Traumatology, SBU Ankara Training and Research Hospital, 06340 Ankara, Turkey
| | - Bahar Füsun Oduncuoğlu
- Department of Periodontology, Faculty of Dentistry, Baskent University, 06590 Ankara, Turkey
| | - Tuğçe Hacaloğlu
- Department of Manufacturing Engineering, Atilim University, Kizilcasar Mah 06836 Ankara, Turkey
| | - Bilgin Kaftanoğlu
- Department of Manufacturing Engineering, Atilim University, Kizilcasar Mah 06836 Ankara, Turkey
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Barberi J, Spriano S. Titanium and Protein Adsorption: An Overview of Mechanisms and Effects of Surface Features. MATERIALS (BASEL, SWITZERLAND) 2021; 14:1590. [PMID: 33805137 PMCID: PMC8037091 DOI: 10.3390/ma14071590] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 03/09/2021] [Accepted: 03/19/2021] [Indexed: 12/14/2022]
Abstract
Titanium and its alloys, specially Ti6Al4V, are among the most employed materials in orthopedic and dental implants. Cells response and osseointegration of implant devices are strongly dependent on the body-biomaterial interface zone. This interface is mainly defined by proteins: They adsorb immediately after implantation from blood and biological fluids, forming a layer on implant surfaces. Therefore, it is of utmost importance to understand which features of biomaterials surfaces influence formation of the protein layer and how to guide it. In this paper, relevant literature of the last 15 years about protein adsorption on titanium-based materials is reviewed. How the surface characteristics affect protein adsorption is investigated, aiming to provide an as comprehensive a picture as possible of adsorption mechanisms and type of chemical bonding with the surface, as well as of the characterization techniques effectively applied to model and real implant surfaces. Surface free energy, charge, microroughness, and hydroxylation degree have been found to be the main surface parameters to affect the amount of adsorbed proteins. On the other hand, the conformation of adsorbed proteins is mainly dictated by the protein structure, surface topography at the nano-scale, and exposed functional groups. Protein adsorption on titanium surfaces still needs further clarification, in particular concerning adsorption from complex protein solutions. In addition, characterization techniques to investigate and compare the different aspects of protein adsorption on different surfaces (in terms of roughness and chemistry) shall be developed.
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Affiliation(s)
- Jacopo Barberi
- Department of Applied Science and Technology, Politecnico di Torino, 10129 Turin, Italy;
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Sochacka P, Jurczyk MU, Kowalski K, Wirstlein PK, Jurczyk M. Ultrafine-Grained Ti-31Mo-Type Composites with HA and Ag, Ta 2O 5 or CeO 2 Addition for Implant Applications. MATERIALS 2021; 14:ma14030644. [PMID: 33573314 PMCID: PMC7866795 DOI: 10.3390/ma14030644] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 01/18/2021] [Accepted: 01/28/2021] [Indexed: 02/07/2023]
Abstract
Ultrafine-grained Ti31Mo alloy and Ti31Mo5HA, Ti31Mo5HA-Ag (or Ta2O5, CeO2) composites with a grain size of approximately 2 μm were produced by the application of mechanical alloying and powder metallurgy. Additionally, the surface of the Ti31Mo alloy was modified. In the first stage, the specimens were immersed in 5M NaOH for 24 h at 60 °C. In the second stage, hydroxyapatite (HA) was deposited on the sample surface. The cathodic deposition at −5 V vs. open circuit potential (OCP) in the electrolyte containing 0.25M CaNa2-EDTA (di-calcium ethylenediaminetetraacetic acid), 0.25M K2HPO4 in 1M NaOH at 120 °C for 2 h was applied. The bulk Ti31Mo alloy is a single β-type phase. In the alkali-modified surface titanium oxide, Ti3O is formed. After hydrothermal treatment, the surface layer mostly consists of the Ca10(PO4)6(OH)2 (81.23%) with about 19% content of CaHPO4·2H2O. Using optical profiler, roughness 2D surface topography parameters were estimated. The in vitro cytocompatibility of synthesized materials was studied. The cell lines of normal human osteoblasts (NHost) and human periodontal ligament fibroblasts (HPdLF) was conducted in the presence of tested biomaterials. Ultrafine-grained Ti-based composites altered with HA and Ag, Ta2O5 or CeO2 have superior biocompatibility than the microcrystalline Ti metal. NHost and HPdLF cells in the contact with the synthesized biomaterial showed stable proliferation activity. Biocompatibility tests carried out indicate that the ultrafine-grained Ti31Mo5HA composites with Ag, Ta2O5, or CeO2 could be a good candidate for implant applications.
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Affiliation(s)
- Patrycja Sochacka
- Institute of Materials Science and Engineering, Poznan University of Technology, Jana Pawła II 24, 61-138 Poznan, Poland; (K.K.); (M.J.)
- Correspondence: ; Tel.: +48-61-665-3508
| | - Mieczyslawa U. Jurczyk
- Division of Mother’s and Child’s Health, Poznan University of Medical Sciences, Polna 33, 60-535 Poznan, Poland;
| | - Kamil Kowalski
- Institute of Materials Science and Engineering, Poznan University of Technology, Jana Pawła II 24, 61-138 Poznan, Poland; (K.K.); (M.J.)
| | - Przemyslaw K. Wirstlein
- Department of Gynaecology and Obstetrics, Division of Reproduction, Poznan University of Medical Sciences, Polna 33, 60-535 Poznan, Poland;
| | - Mieczyslaw Jurczyk
- Institute of Materials Science and Engineering, Poznan University of Technology, Jana Pawła II 24, 61-138 Poznan, Poland; (K.K.); (M.J.)
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Marczewski M, Jurczyk MU, Kowalski K, Miklaszewski A, Wirstlein PK, Jurczyk M. Composite and Surface Functionalization of Ultrafine-Grained Ti23Zr25Nb Alloy for Medical Applications. MATERIALS 2020; 13:ma13225252. [PMID: 33233693 PMCID: PMC7699683 DOI: 10.3390/ma13225252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 11/06/2020] [Accepted: 11/18/2020] [Indexed: 12/26/2022]
Abstract
In this study, the ultrafine-grained Ti23Zr25Nb-based composites with 45S5 Bioglass and Ag, Cu, or Zn additions were produced by application of the mechanical alloying technique. Additionally, the base Ti23Zr25Nb alloy was electrochemically modified in the two stages of processing: electrochemical etching in the solution of H3PO4 and HF followed by electrochemical deposition in Ca(NO3)2, (NH4)2HPO4, and HCl. The in vitro cytocompatibility studies were also done with comparison to the commercially pure titanium. The established cell lines of Normal Human Osteoblasts (NHost, CC-2538) and Human Periodontal Ligament Fibroblasts (HPdLF, CC-7049) were used. The culture was conducted among the tested materials. Ultrafine-grained titanium-based composites modified with 45S5 Bioglass and Ag, Cu, or Zn metals have higher biocompatibility than the reference material in the form of a microcrystalline Ti. Proliferation activity was at a stable level with contact with studied materials. In vitro evaluation research showed that the ultrafine-grained Ti23Zr25Nb-based composites with 45S5 Bioglass and Ag, Cu, or Zn additions, with a Young modulus below 50 GPa, can be further used in the biomedical field.
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Affiliation(s)
- Mateusz Marczewski
- Institute of Materials Science and Engineering, Poznan University of Technology, Jana Pawła II 24, 61-138 Poznan, Poland; (K.K.); (A.M.); (M.J.)
- Correspondence: ; Tel.: +48-61-665-3508
| | - Mieczysława U. Jurczyk
- Division of Mother’s and Child’s Health, Poznan University of Medical Sciences, Polna 33, 60-535 Poznan, Poland;
| | - Kamil Kowalski
- Institute of Materials Science and Engineering, Poznan University of Technology, Jana Pawła II 24, 61-138 Poznan, Poland; (K.K.); (A.M.); (M.J.)
| | - Andrzej Miklaszewski
- Institute of Materials Science and Engineering, Poznan University of Technology, Jana Pawła II 24, 61-138 Poznan, Poland; (K.K.); (A.M.); (M.J.)
| | - Przemysław K. Wirstlein
- Department of Gynaecology and Obstetrics, Division of Reproduction, Poznan University of Medical Sciences, Polna 33, 60-535 Poznan, Poland;
| | - Mieczysław Jurczyk
- Institute of Materials Science and Engineering, Poznan University of Technology, Jana Pawła II 24, 61-138 Poznan, Poland; (K.K.); (A.M.); (M.J.)
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Yin C, Jia X, Miron RJ, Long Q, Xu H, Wei Y, Wu M, Zhang Y, Li Z. Setd7 and its contribution to Boron-induced bone regeneration in Boron-mesoporous bioactive glass scaffolds. Acta Biomater 2018; 73:522-530. [PMID: 29684621 DOI: 10.1016/j.actbio.2018.04.033] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 04/04/2018] [Accepted: 04/18/2018] [Indexed: 10/17/2022]
Abstract
Boron (B), a trace element found in the human body, plays an important role for health of bone by promoting the proliferation and differentiation of osteoblasts. Our research group previously fabricated B-mesoporous bioactive glass (MBG) scaffolds, which successfully promoted osteogenic differentiation of osteoblasts when compared to pure MBG scaffolds without boron. However, the mechanisms of the positive effect of B-MBG scaffolds on osteogenesis remain unknown. Therefore, we performed in-vivo experiments in OVX rat models with pure MBG scaffolds and compared them to B-MBG scaffold. As a result, we found that B-MBG scaffold induced more new bone regeneration compared to pure MBG scaffold and examined genes related to bone regeneration induced by B-MBG scaffold through RNA-seq to obtain target genes and epigenetic mechanisms. The results demonstrated an increased expression and affiliation of Setd7 in the B-MBG group when compared to the MBG group. Immunofluorescent staining from our in vivo samples further demonstrated a higher localization of Setd7 and H3K4me3 in Runx2-positive cells in defects treated with B-MBG scaffolds. KEGG results suggested that specifically Wnt/β-catenin signaling pathway was highly activated in new bone area associated with B-MBG scaffolds. Thereafter, in vitro studies with human bone marrow stem cells (hBMSCs) stimulated by extracted liquid of B-MBG scaffolds was associated with significantly elevated levels of Setd7, as well as H3K4me3 when compared to MBG scaffolds alone. To verify the role of Setd7 in new bone formation in the presence of Boron, Setd7 was knocked down in hBMSCs with stimulation of the extracted liquids of B-MBG or MBG scaffolds. The result showed that osteoblast differentiation of hBMSCs was inhibited when Setd7 was knocked down, which could not be rescued by the extracted liquids of B-MBG scaffolds confirming its role in osteoblast differentiation and bone regeneration. As a histone methylase, Setd7 may be expected to be a potential epigenetic target for new treatment schemes of osteoporosis. STATEMENT OF SIGNIFICANCE Boron-containing MBG scaffold has already been proved to promote bone regeneration in femoral defects of OVX rats by our research group, however, the epigenetic mechanism of Boron's positive effects on bone generation remains ill-informed. In our present study, we found an increased expression and affiliation of Setd7 and H3K4me3 in Runx2-positive osteoblasts in vivo. And in vitro, the higher expression of Setd7 enhanced osteogenic differentiation of human BMSCs stimulated by extracted liquids of B-MBG scaffold compared to MBG scaffold, which was associated with the activation of Wnt/β-catenin signaling pathway. Above all, it suggests that Setd7 plays an positive role in osteogenic differentiation and it may become a potential epigenetic target for new schemes for osteoporosis.
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Cordeiro JM, Beline T, Ribeiro ALR, Rangel EC, da Cruz NC, Landers R, Faverani LP, Vaz LG, Fais LMG, Vicente FB, Grandini CR, Mathew MT, Sukotjo C, Barão VAR. Development of binary and ternary titanium alloys for dental implants. Dent Mater 2017; 33:1244-1257. [PMID: 28778495 DOI: 10.1016/j.dental.2017.07.013] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 07/10/2017] [Accepted: 07/13/2017] [Indexed: 01/21/2023]
Abstract
OBJECTIVE The aim of this study was to develop binary and ternary titanium (Ti) alloys containing zirconium (Zr) and niobium (Nb) and to characterize them in terms of microstructural, mechanical, chemical, electrochemical, and biological properties. METHODS The experimental alloys - (in wt%) Ti-5Zr, Ti-10Zr, Ti-35Nb-5Zr, and Ti-35Nb-10Zr - were fabricated from pure metals. Commercially pure titanium (cpTi) and Ti-6Al-4V were used as controls. Microstructural analysis was performed by means of X-ray diffraction and scanning electron microscopy. Vickers microhardness, elastic modulus, dispersive energy spectroscopy, X-ray excited photoelectron spectroscopy, atomic force microscopy, surface roughness, and surface free energy were evaluated. The electrochemical behavior analysis was conducted in a body fluid solution (pH 7.4). The albumin adsorption was measured by the bicinchoninic acid method. Data were evaluated through one-way ANOVA and the Tukey test (α=0.05). RESULTS The alloying elements proved to modify the alloy microstructure and to enhance the mechanical properties, improving the hardness and decreasing the elastic modulus of the binary and ternary alloys, respectively. Ti-Zr alloys displayed greater electrochemical stability relative to that of controls, presenting higher polarization resistance and lower capacitance. The experimental alloys were not detrimental to albumin adsorption. SIGNIFICANCE The experimental alloys are suitable options for dental implant manufacturing, particularly the binary system, which showed a better combination of mechanical and electrochemical properties without the presence of toxic elements.
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Affiliation(s)
- Jairo M Cordeiro
- University of Campinas (UNICAMP), Piracicaba Dental School, Department of Prosthodontics and Periodontology, Av. Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil; Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), Brazil and USA
| | - Thamara Beline
- University of Campinas (UNICAMP), Piracicaba Dental School, Department of Prosthodontics and Periodontology, Av. Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil; Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), Brazil and USA
| | - Ana Lúcia R Ribeiro
- Faculdade de Ciências do Tocantins (FACIT), Rua D 25, Qd 11, Lt 10, Setor George Yunes, Araguaína, Tocantins 77818-650, Brazil; Faculdade de Ciências Humanas, Econômicas e da Saúde de Araguaína/Instituto Tocantinense Presidente Antônio Carlos (FAHESA/ITPAC), Av. Filadélfia, 568, Araguaína, Tocantins 77816-540, Brazil
| | - Elidiane C Rangel
- Univ Estadual Paulista (UNESP), Engineering College, Laboratory of Technological Plasmas, Av. Três de Março, 511, Sorocaba, São Paulo 18087-180, Brazil
| | - Nilson C da Cruz
- Univ Estadual Paulista (UNESP), Engineering College, Laboratory of Technological Plasmas, Av. Três de Março, 511, Sorocaba, São Paulo 18087-180, Brazil
| | - Richard Landers
- University of Campinas (UNICAMP), Institute of Physics Gleb Wataghin, Cidade Universitária Zeferino Vaz-Barão Geraldo, Campinas, São Paulo 13083-859, Brazil
| | - Leonardo P Faverani
- Univ Estadual Paulista (UNESP), Aracatuba Dental School, Department of Surgery and Integrated Clinic, R. José Bonifácio, 1193, Aracatuba, São Paulo 16015-050, Brazil
| | - Luís Geraldo Vaz
- Univ Estadual Paulista (UNESP), Araraquara Dental School, Department of Dental Materials and Prosthodontics, R. Humaitá, 1680, Araraquara, São Paulo 14801-903, Brazil
| | - Laiza M G Fais
- Univ Estadual Paulista (UNESP), Araraquara Dental School, Department of Dental Materials and Prosthodontics, R. Humaitá, 1680, Araraquara, São Paulo 14801-903, Brazil
| | - Fabio B Vicente
- Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), Brazil and USA; Universidade Paulista (UNIP), Av. Nossa Sra. de Fátima, 9-50, Bauru, São Paulo 17017-337, Brazil
| | - Carlos R Grandini
- Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), Brazil and USA; Univ Estadual Paulista (UNESP), Laboratório de Anelasticidade e Biomateriais, Av. Eng. Luiz Edmundo Carrijo Coube, Bauru, São Paulo 17033-360, Brazil
| | - Mathew T Mathew
- Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), Brazil and USA; University of Illinois College of Medicine at Rockford, Department of Biomedical Sciences, 1601 Parkview Avenue, Rockford, IL 61107, USA; University of Illinois at Chicago, College of Dentistry, Department of Restorative Dentistry, 801 S Paulina, Chicago, IL 60612, USA
| | - Cortino Sukotjo
- Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), Brazil and USA; University of Illinois at Chicago, College of Dentistry, Department of Restorative Dentistry, 801 S Paulina, Chicago, IL 60612, USA
| | - Valentim A R Barão
- University of Campinas (UNICAMP), Piracicaba Dental School, Department of Prosthodontics and Periodontology, Av. Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil; Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), Brazil and USA.
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In vitro biocompatibility of titanium after plasma surface alloying with boron. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 69:1240-7. [DOI: 10.1016/j.msec.2016.08.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 06/26/2016] [Accepted: 08/02/2016] [Indexed: 01/11/2023]
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Kazek-Kęsik A, Krok-Borkowicz M, Dercz G, Donesz-Sikorska A, Pamuła E, Simka W. Multilayer coatings formed on titanium alloy surfaces by plasma electrolytic oxidation-electrophoretic deposition methods. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.02.193] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Uyar T, Çökeliler D, Doğan M, Koçum IC, Karatay O, Denkbaş EB. Electrospun nanofiber reinforcement of dental composites with electromagnetic alignment approach. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 62:762-70. [PMID: 26952482 DOI: 10.1016/j.msec.2016.02.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Revised: 01/19/2016] [Accepted: 02/02/2016] [Indexed: 11/25/2022]
Abstract
Polymethylmethacrylate (PMMA) is commonly used as a base acrylic denture material with benefits of rapid and easy handling, however, when it is used in prosthetic dentistry, fracturing or cracking problems can be seen due to the relatively low strength issues. Besides, acrylic resin is the still prominent material for denture fabrication due to its handy and low cost features. Numerous proposed fillers that are used to produce PMMA composites, however electrospun polyvinylalcohol (PVA) nanofiber fillers for production of PMMA composite resins are not studied as much as the others. The other focus of the practice is to compare both mechanical properties and efficiency of aligned fibers versus non-aligned PVA nanofibers in PMMA based dental composites. Field-controlled electrospinning system is manufactured and provided good alignment in lab scale as one of contributions. Some novel auxiliary electrodes in controlled structure are augmented to obtain different patterns of alignment with a certain range of fiber diameters. Scanning electron microscopy is used for physical characterization to determine the range of fiber diameters. Non-woven fiber has no unique pattern due to chaotic nature of electrospinning process, but aligned fibers have round pattern or crossed lines. These produced fibers are structured as layer-by-layer form with different features, and these features are used in producing PMMA dental composites with different volume ratios. The maximum flexural strength figure shows that fiber load by weight of 0.25% w/w and above improves in the maximum level. As a result, mechanical properties of PMMA dental composites are improved by using PVA nanofibers as a filler, however the improvement was higher when aligned PVA nanofibers are used. The maximum values were 5.1 MPa (flexural strength), 0.8 GPa (elastic modulus), and 170 kJ/m(3) (toughness) in three-point bending test. In addition to the positive results of aligned and non-aligned nanofibers it was found that they both have a non-toxic feature.
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Affiliation(s)
- Tansel Uyar
- Department of Biomedical Engineering, Başkent University Bağlıca Campus, 06530 Ankara, Turkey
| | - Dilek Çökeliler
- Department of Biomedical Engineering, Başkent University Bağlıca Campus, 06530 Ankara, Turkey.
| | - Mustafa Doğan
- Department of Electrical and Electronics Engineering, Başkent University, Ankara 06180, Turkey
| | - Ismail Cengiz Koçum
- Department of Biomedical Engineering, Başkent University Bağlıca Campus, 06530 Ankara, Turkey
| | - Okan Karatay
- Department of Electrical and Electronics Engineering, Başkent University, Ankara 06180, Turkey
| | - Emir Baki Denkbaş
- Department of Chemistry, Biochemistry Division, Hacettepe University, Ankara, Turkey
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Canullo L, Genova T, Tallarico M, Gautier G, Mussano F, Botticelli D. Plasma of Argon Affects the Earliest Biological Response of Different Implant Surfaces: An In Vitro Comparative Study. J Dent Res 2016; 95:566-73. [PMID: 26848069 DOI: 10.1177/0022034516629119] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The aim of this in vitro study was to evaluate the early cell response and protein adsorption elicited by the argon plasma treatment of different commercially available titanium surfaces via a chair-side device. Sterile disks made of grade 4 titanium (n= 450, 4-mm diameter) with 3 surface topographies (machined, plasma sprayed, and zirconia blasted and acid etched) were allocated to receive 4 testing treatments (2% and 10% protein adsorption and cell adhesion with MC3T3-E1 and MG-63). Furthermore, the specimens were divided to undergo 1) argon plasma treatment (10 W, 1 bar for 12 min) in a plasma reactor, 2) ultraviolet (UV) light treatment for 2 h (positive control group), or 3) no treatment (control group). Pretreatment surface analyses based on a scanning electron microscope and profilometer images were also performed. Profilometric analysis demonstrated that the evaluated specimens perfectly suit the standard parameters. The use of argon plasma was capable of affecting the quantity of proteins adsorbed on the different surfaces, notwithstanding their roughness or topographic features at a low fetal bovine serum concentration (2%). UV light treatment for 2 h attained similar results. Moreover, both the plasma of argon and the UV light demonstrated a significant increase in the number of osteoblasts adherent at 10 min in all tested surfaces. Within its limitations, this in vitro study highlights the potential biological benefits of treating implant surfaces with plasma of argon or UV, irrespective of the roughness of the titanium surface. However, in vivo experiments are needed to confirm these preliminary data and settle the rationale of a treatment that might be clinically relevant in case of bone-reparative deficiencies.
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Affiliation(s)
| | - T Genova
- CIR Dental School, Department of Surgical Sciences UNITO, Turin, Italy Department of Life Sciences and Systems Biology, UNITO, Turin, Italy
| | | | - G Gautier
- IMAMOTER-National Council of Research, Turin, Italy
| | - F Mussano
- CIR Dental School, Department of Surgical Sciences UNITO, Turin, Italy
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Liu Y, Li K, Luo T, Song M, Wu H, Xiao J, Tan Y, Cheng M, Chen B, Niu X, Hu R, Li X, Tang H. Powder metallurgical low-modulus Ti-Mg alloys for biomedical applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 56:241-50. [PMID: 26249586 DOI: 10.1016/j.msec.2015.06.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 05/10/2015] [Accepted: 06/09/2015] [Indexed: 11/16/2022]
Abstract
In this work, powder metallurgical (PM) Ti-Mg alloys were prepared using combined techniques of mechanical alloying and spark plasma sintering. The alloys mainly consist of super saturations of Mg in Ti matrix, and some laminar structured Ti- and Mg-rich phases. The PM Ti-Mg alloys contain a homogeneous mixtures of nanocrystalline Mg and Ti phases. The novel microstructures result in unconventional mechanical and biological properties. It has been shown that the PM Ti-Mg alloys have a much lower compression modulus (36-50GPa) compared to other Ti alloys, but still remain a very high compressive strength (1500-1800MPa). In addition, the PM Ti-Mg alloys show good biocompatibility and bioactivity. Mg can dissolve in the simulated body fluids, and induce the formation of the calcium phosphate layer. The compression modulus of PM Ti-Mg alloys decreases with the amount of Mg, while the bioactivity increases. Although the corrosion resistance of Ti-Mg alloys decreases with the content of Mg, the alloys still show good stability in simulated body fluid under electrochemical conditions. The indirect and direct cytotoxicity results show that PM Ti-Mg alloys have a good biocompatibility to NIH-3T3 cells. Therefore, the PM Ti-Mg alloys are promising candidates in biomedical applications.
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Affiliation(s)
- Yong Liu
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, PR China.
| | - Kaiyang Li
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, PR China
| | - Tao Luo
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, PR China
| | - Min Song
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, PR China
| | - Hong Wu
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, PR China.
| | - Jian Xiao
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410078, PR China
| | - Yanni Tan
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, PR China
| | - Ming Cheng
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, PR China
| | - Bing Chen
- Department of Mechanical & Biomedical Engineering, City University of Hong Kong, Hong Kong, PR China
| | - Xinrui Niu
- Department of Mechanical & Biomedical Engineering, City University of Hong Kong, Hong Kong, PR China
| | - Rong Hu
- Department of Pharmacology, School of Pharmaceutical Science, Central South University, Changsha 410078, PR China
| | - Xiaohui Li
- Department of Pharmacology, School of Pharmaceutical Science, Central South University, Changsha 410078, PR China
| | - Huiping Tang
- State Key Laboratory of Porous Metal Materials, Northwestern Institute of Nonferrous Metals Research, Xi'an 7100012, PR China
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