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Yang S, Huang F, Zhang F, Sheng X, Fan W, Dissanayaka WL. Emerging Roles of YAP/TAZ in Tooth and Surrounding: from Development to Regeneration. Stem Cell Rev Rep 2023:10.1007/s12015-023-10551-z. [PMID: 37178226 DOI: 10.1007/s12015-023-10551-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/27/2023] [Indexed: 05/15/2023]
Abstract
Yes associated protein (YAP) and transcriptional coactivator with PDZ-binding motif (TAZ) are ubiquitous transcriptional co-activators that control organ development, homeostasis, and tissue regeneration. Current in vivo evidence suggests that YAP/TAZ regulates enamel knot formation during murine tooth development, and is indispensable for dental progenitor cell renewal to support constant incisor growth. Being a critical sensor for cellular mechano-transduction, YAP/TAZ lays at the center of the complex molecular network that integrates mechanical cues from the dental pulp chamber and surrounding periodontal tissue into biochemical signals, dictating in vitro cell proliferation, differentiation, stemness maintenance, and migration of dental stem cells. Moreover, YAP/TAZ-mediated cell-microenvironment interactions also display essential regulatory roles during biomaterial-guided dental tissue repair and engineering in some animal models. Here, we review recent advances in YAP/TAZ functions in tooth development, dental pulp, and periodontal physiology, as well as dental tissue regeneration. We also highlight several promising strategies that harness YAP/TAZ activation for promoting dental tissue regeneration.
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Affiliation(s)
- Shengyan Yang
- Applied Oral Sciences & Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Fang Huang
- Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Fuping Zhang
- Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Xinyue Sheng
- Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Wenguo Fan
- Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Waruna Lakmal Dissanayaka
- Applied Oral Sciences & Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China.
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Ca19Zn2(PO4)14 Nanoparticles: Synthesis, characterization and its effect on the colonization of Streptococcus mutans on tooth surface. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Moreira A, Madeira S, Buciumeanu M, Fialho J, Carvalho A, Silva F, Monteiro FJ, Caramês J. Design and surface characterization of micropatterned silica coatings for zirconia dental implants. J Mech Behav Biomed Mater 2022; 126:105060. [PMID: 34974323 DOI: 10.1016/j.jmbbm.2021.105060] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 12/15/2021] [Accepted: 12/20/2021] [Indexed: 11/16/2022]
Abstract
The use of zirconia as an alternative biomaterial for titanium implants has been increasing due to its biocompatibility, favorable aesthetic features, less potential for early plaque accumulation and mechanical properties. Despite the developed efforts, strategies to promote an effective osseointegration are still enough. In this sense and combining the silica properties to improve bone formation with the micropatterning guidance characteristics, silica coatings with micropatterns were designed and evaluated regarding their hydrophilicity and integrity through resistance to scratch and friction tests against femoral bone plates (simulating implant insertion). A combined sol-gel and soft-lithography techniques were used to produce silica coatings onto zirconia substrates and different techniques were used to characterize the micropatterned silica coatings. The results revealed that the production of lines and pillars micropatterns increases the surface roughness (Ra values) and improves the surface strength adhesion. Through the scratch test, it was possible to verify that the integrity and topography characteristics of all micropatterned coatings were not significantly affected after the friction test meaning that their function is not compromised after implant insertion. Additionally, the lines micropattern was the one that presented the highest hydrophilicity for distilled water, thus being a promising surface to promote improved osseointegration. The combined use of different surface micropatterns could potentially be used to guide bone apposition and avoiding peri-implantitis.
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Affiliation(s)
- André Moreira
- Department of Oral Surgery and Implant Dentistry, Faculdade de Medicina Dentária, Universidade de Lisboa, 1600-277, Lisboa, Portugal.
| | - Sara Madeira
- Center for Micro-Electro Mechanical Systems (CMEMS-UMinho), Universidade do Minho, Campus de Azurém, 4800-058, Guimarães, Portugal
| | - Mihaela Buciumeanu
- Faculty of Engineering, "Dunărea de Jos" University of Galaţi, Domnească 47, 800008, Galati, Romania
| | - Joana Fialho
- Escola Superior de Tecnologia e Gestão de Viseu, CI&DEI, Instituto Politécnico de Viseu, 3504-510 Viseu, Portugal
| | - Angela Carvalho
- i3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135, Porto, Portugal; INEB, Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen 208, 4200-135, Porto, Portugal
| | - Filipe Silva
- Center for Micro-Electro Mechanical Systems (CMEMS-UMinho), Universidade do Minho, Campus de Azurém, 4800-058, Guimarães, Portugal
| | - Fernando J Monteiro
- i3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135, Porto, Portugal; INEB, Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen 208, 4200-135, Porto, Portugal; Faculdade de Engenharia, Departamento de Engenharia Metalúrgica e Materiais, Universidade do Porto, Rua Dr Roberto Frias, s/n, 4200-465, Porto, Portugal
| | - João Caramês
- Department of Oral Surgery and Implant Dentistry, Faculdade de Medicina Dentária, Universidade de Lisboa, 1600-277, Lisboa, Portugal
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Surface Modification by Combination of Dip-Pen Nanolithography and Soft Lithography for Reduction of Bacterial Adhesion. JOURNAL OF NANOTECHNOLOGY 2018. [DOI: 10.1155/2018/8624735] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Dip-pen nanolithography (DPN) and soft lithography are techniques suitable to modify the surface of biomaterials. Modified surfaces might play a role in modulating cells and reducing bacterial adhesion and biofilm formation. The main objective of this study was threefold: first, to create patterns at microscale on model surfaces using DPN; second, to duplicate and transfer these patterns to a real biomaterial surface using a microstamping technique; and finally, to assess bacterial adhesion to these developed patterned surfaces using the cariogenic species Streptococcus mutans. DPN was used with a polymeric adhesive to create dot patterns on model surfaces. Elastomeric polydimethylsiloxane was used to duplicate the patterns and silica sol to transfer them to the medical grade stainless steel 316L surface by microstamping. Optical microscopy and atomic force microscopy (AFM) were used to characterize the patterns. S. mutans adhesion was assessed by colony-forming units (CFUs), MTT viability assay, and scanning electron microscopy (SEM). DPN allowed creating microarrays from 1 to 5 µm in diameter on model surfaces that were successfully transferred to the stainless steel 316L surface via microstamping. A significant reduction up to one order of magnitude in bacterial adhesion to micropatterned surfaces was observed. The presented experimental approach may be used to create patterns at microscale on a surface and transfer them to other surfaces of interest. A reduction in bacterial adhesion to patterned surfaces might have a major impact since adhesion is a key step in biofilm formation and development of biomaterial-related infections.
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A novel approach to create an antibacterial surface using titanium dioxide and a combination of dip-pen nanolithography and soft lithography. Sci Rep 2018; 8:15818. [PMID: 30361619 PMCID: PMC6202409 DOI: 10.1038/s41598-018-34198-w] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 10/10/2018] [Indexed: 12/27/2022] Open
Abstract
Soft lithography and Dip-Pen Nanolithography (DPN) are techniques that have been used to modify the surface of biomaterials. Modified surfaces play a role in reducing bacterial adhesion and biofilm formation. Also, titanium dioxide has been reported as an antibacterial substance due to its photocatalytic effect. This work aimed at creating patterns on model surfaces using DPN and soft lithography combined with titanium dioxide to create functional antibacterial micropatterned surfaces, which were tested against Streptococcus mutans. DPN was used to create a master pattern onto a model surface and microstamping was performed to duplicate and transfer such patterns to medical-grade stainless steel 316L using a suspension of TiO2. Modified SS316L plates were subjected to UVA black light as photocatalytic activator. Patterns were characterized by atomic force microscopy and biologically evaluated using S. mutans. A significant reduction of up to 60% in bacterial adhesion to TiO2 -coated and -micropatterned surfaces was observed. Moreover, both TiO2 surfaces reduced the viability of adhered bacteria after UV exposure. TiO2 micropatterned demonstrated a synergic effect between physical and chemical modification against S. mutans. This dual effect was enhanced by increasing TiO2 concentration. This novel approach may be a promising alternative to reduce bacterial adhesion to surfaces.
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Miranda RBP, Grenho L, Carvalho A, Fernandes MH, Monteiro FJ, Cesar PF. Micropatterned Silica Films with Nanohydroxyapatite for Y-TZP Implants. J Dent Res 2018; 97:1003-1009. [PMID: 29608862 DOI: 10.1177/0022034518765762] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
This investigation aimed at developing micropatterned silica thin films (MSTFs) containing nanohydroxyapatite (nano-HA) microaggregates that were not completely covered by silica so that they could directly interact with the surrounding cells. The objectives were 1) to evaluate the effect of the presence of 2 films (MSTF with or without nano-HA addition) on the characteristic strength (σ0) and Weibull modulus ( m) of a yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) and 2) to evaluate the effect of these 2 films, as applied onto the Y-TZP surface, on the morphology, orientation, and proliferation of MG63 cells. Sol-gel process and soft lithography were used to apply the MSTF onto the Y-TZP specimens. Three experimental groups were produced: Y-TZP, Y-TZP + MSTF, and Y-TZP + MSTF + sprayed nano-HA. All surfaces were characterized by scanning electron microscopy and energy-dispersive X-ray spectroscopy and tested for 4-point flexural strength ( n = 30) in water at 37 °C. Weibull analysis was used to determine m and σ0 (maximum likelihood method). In vitro biological behavior was performed with human osteoblast-like cells (MG63). Y-TZP was successfully coated with MSFT and MSFT + nano-HA. Scanning electron microscopy micrographs indicated that the microaggregates of nano-HA were not entirely covered by the silica. There was no statistically significant difference among the experimental groups for σ0 and m. In the groups containing the films, the cells were elongated and aligned along the lines. The MSFT + nano-HA group showed significantly higher cell metabolic activity than that obtained for the Y-TZP group at day 7. This investigation was successful in producing an MSTF containing nano-HA microaggregates that remained exposed to the environment. The developed films did not jeopardize the structural reliability of a commercial Y-TZP, as confirmed by the Weibull statistics. The MG63 cells seeded over the films became elongated and aligned along the films' micropatterned lines. Y-TZP specimens coated with MSTF and nano-HA showed a higher cell metabolic activity and proliferation after 7 d of culture when compared with uncoated Y-TZP.
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Affiliation(s)
- R B P Miranda
- 1 Departamento de Biomateriais e Biologia Oral, Faculdade de Odontologia, Universidade de São Paulo, São Paulo, Brasil.,2 i3S-Instituto de Investigação e Inovação em Saúde, U. Porto, Porto, Portugal.,3 Laboratory for Bone Metabolism and Regeneration, Faculdade de Medicina Dentária, U. Porto, Porto, Portugal
| | - L Grenho
- 3 Laboratory for Bone Metabolism and Regeneration, Faculdade de Medicina Dentária, U. Porto, Porto, Portugal.,4 LAQV/REQUIMTE, U. Porto, Portugal
| | - A Carvalho
- 2 i3S-Instituto de Investigação e Inovação em Saúde, U. Porto, Porto, Portugal.,5 Departamento de Engenharia Metalúrgica e dos Materiais, Faculdade de Engenharia, U. Porto, Porto, Portugal.,6 INEB-Instituto de Engenharia Biomédica, U. Porto, Porto, Portugal
| | - M H Fernandes
- 3 Laboratory for Bone Metabolism and Regeneration, Faculdade de Medicina Dentária, U. Porto, Porto, Portugal.,4 LAQV/REQUIMTE, U. Porto, Portugal
| | - F J Monteiro
- 2 i3S-Instituto de Investigação e Inovação em Saúde, U. Porto, Porto, Portugal.,5 Departamento de Engenharia Metalúrgica e dos Materiais, Faculdade de Engenharia, U. Porto, Porto, Portugal.,6 INEB-Instituto de Engenharia Biomédica, U. Porto, Porto, Portugal
| | - P F Cesar
- 1 Departamento de Biomateriais e Biologia Oral, Faculdade de Odontologia, Universidade de São Paulo, São Paulo, Brasil
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Bose S, Robertson SF, Bandyopadhyay A. Surface modification of biomaterials and biomedical devices using additive manufacturing. Acta Biomater 2018; 66:6-22. [PMID: 29109027 PMCID: PMC5785782 DOI: 10.1016/j.actbio.2017.11.003] [Citation(s) in RCA: 108] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 11/01/2017] [Accepted: 11/02/2017] [Indexed: 12/15/2022]
Abstract
The demand for synthetic biomaterials in medical devices, pharmaceutical products and, tissue replacement applications are growing steadily due to aging population worldwide. The use for patient matched devices is also increasing due to availability and integration of new technologies. Applications of additive manufacturing (AM) or 3D printing (3DP) in biomaterials have also increased significantly over the past decade towards traditional as well as innovative next generation Class I, II and III devices. In this review, we have focused our attention towards the use of AM in surface modified biomaterials to enhance their in vitro and in vivo performances. Specifically, we have discussed the use of AM to deliberately modify the surfaces of different classes of biomaterials with spatial specificity in a single manufacturing process as well as commented on the future outlook towards surface modification using AM. STATEMENT OF SIGNIFICANCE It is widely understood that the success of implanted medical devices depends largely on favorable material-tissue interactions. Additive manufacturing has gained traction as a viable and unique approach to engineered biomaterials, for both bulk and surface properties that improve implant outcomes. This review explores how additive manufacturing techniques have been and can be used to augment the surfaces of biomedical devices for direct clinical applications.
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Affiliation(s)
- Susmita Bose
- W. M. Keck Biomedical Materials Research Lab, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, United States.
| | - Samuel Ford Robertson
- W. M. Keck Biomedical Materials Research Lab, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, United States
| | - Amit Bandyopadhyay
- W. M. Keck Biomedical Materials Research Lab, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, United States
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Soft Lithography and Minimally Human Invasive Technique for Rapid Screening of Oral Biofilm Formation on New Microfabricated Dental Material Surfaces. Int J Dent 2018; 2018:4219625. [PMID: 29593793 PMCID: PMC5821979 DOI: 10.1155/2018/4219625] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Accepted: 11/19/2017] [Indexed: 11/18/2022] Open
Abstract
Introduction Microfabrication offers opportunities to study surface concepts focused to reduce bacterial adhesion on implants using human minimally invasive rapid screening (hMIRS). Wide information is available about cell/biomaterial interactions using eukaryotic and prokaryotic cells on surfaces of dental materials with different topographies, but studies using human being are still limited. Objective To evaluate a synergy of microfabrication and hMIRS to study the bacterial adhesion on micropatterned surfaces for dental materials. Materials and Methods Micropatterned and flat surfaces on biomedical PDMS disks were produced by soft lithography. The hMIRS approach was used to evaluate the total oral bacterial adhesion on PDMS surfaces placed in the oral cavity of five volunteers (the study was approved by the University Ethical Committee). After 24 h, the disks were analyzed using MTT assay and light microscopy. Results In the present pilot study, microwell structures were microfabricated on the PDMS surface via soft lithography with a spacing of 5 µm. Overall, bacterial adhesion did not significantly differ between the flat and micropatterned surfaces. However, individual analysis of two subjects showed greater bacterial adhesion on the micropatterned surfaces than on the flat surfaces. Significance Microfabrication and hMIRS might be implemented to study the cell/biomaterial interactions for dental materials.
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Lin X, Shi Y, Cao Y, Liu W. Recent progress in stem cell differentiation directed by material and mechanical cues. ACTA ACUST UNITED AC 2016; 11:014109. [PMID: 26836059 DOI: 10.1088/1748-6041/11/1/014109] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Stem cells play essential roles in tissue regeneration in vivo via specific lineage differentiation induced by environmental factors. In the past, biochemical signals were the focus of induced stem cell differentiation. As reported by Engler et al (2006 Cell 126 677-89), biophysical signal mediated stem cell differentiation could also serve as an important inducer. With the advancement of material science, it becomes a possible strategy to generate active biophysical signals for directing stem cell fate through specially designed material microstructures. In the past five years, significant progress has been made in this field, and these designed biophysical signals include material elasticity/rigidity, micropatterned structure, extracellular matrix (ECM) coated materials, material transmitted extracellular mechanical force etc. A large number of investigations involved material directed differentiation of mesenchymal stem cells, neural stem/progenitor cells, adipose derived stem cells, hematopoietic stem/progenitor cells, embryonic stem cells and other cells. Hydrogel based materials were commonly used to create varied mechanical properties via modifying the ratio of different components, crosslinking levels, matrix concentration and conjugation with other components. Among them, polyacrylamide (PAM) and polydimethylsiloxane (PDMS) hydrogels remained the major types of material. Specially designed micropatterning was not only able to create a unique topographical surface to control cell shape, alignment, cell-cell and cell-matrix contact for basic stem cell biology study, but also could be integrated with 3D bioprinting to generate micropattered 3D structure and thus to induce stem cell based tissue regeneration. ECM coating on a specific topographical structure was capable of inducing even more specific and potent stem cell differentiation along with soluble factors and mechanical force. The article overviews the progress of the past five years in this particular field.
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Affiliation(s)
- Xunxun Lin
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhi Zao Ju Rd, People's Republic of China. Shanghai Key Laboratory of Tissue Engineering Research, National Tissue Engineering Center of China, Shanghai, People's Republic of China
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Carvalho A, Pelaez-Vargas A, Hansford DJ, Fernandes MH, Monteiro FJ. Effects of Line and Pillar Array Microengineered SiO2 Thin Films on the Osteogenic Differentiation of Human Bone Marrow-Derived Mesenchymal Stem Cells. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:1091-100. [PMID: 26771563 DOI: 10.1021/acs.langmuir.5b03955] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A primary goal in bone tissue engineering is the design of implants that induce controlled, guided, and rapid healing. The events that normally lead to the integration of an implant into bone and determine the performance of the device occur mainly at the tissue-implant interface. Topographical surface modification of a biomaterial might be an efficient tool for inducing stem cell osteogenic differentiation and replace the use of biochemical stimuli. The main goal of this work was to develop micropatterned bioactive silica thin films to induce the osteogenic differentiation of human bone marrow-derived mesenchymal stem cells (hMSCs) only through topographical stimuli. Line and pillar micropatterns were developed by a combination of sol-gel/soft lithography and characterized by scanning electron microscopy, atomic force microscopy, and contact angle measurements. hMSCs were cultured onto the microfabricated thin films and flat control for up to 21 days under basal conditions. The micropatterned groups induced levels of osteogenic differentiation and expression of osteoblast-associated markers higher than those of the flat controls. Via comparison of the micropatterns, the pillars caused a stronger response of the osteogenic differentiation of hMSCs with a higher level of expression of osteoblast-associated markers, ALP activity, and extracellular matrix mineralization after the cells had been cultured for 21 days. These findings suggest that specific microtopographic cues can direct hMSCs toward osteogenic differentiation.
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Affiliation(s)
- Angela Carvalho
- i3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto , Rua Alfredo Allen, 208 4200-135 Porto, Portugal
- INEB-Instituto de Engenharia Biomédica, Universidade do Porto , Rua Alfredo Allen, 208 4200-135 Porto, Portugal
- Faculdade de Engenharia, Departamento de Engenharia Metalúrgica e Materiais, Universidade do Porto , Rua Dr Roberto Frias, s/n, 4200-465 Porto, Portugal
| | - Alejandro Pelaez-Vargas
- Universidad Cooperativa de Colombia , Faculty of Dentistry, Carrera 47 # 37sur-18, Medellín, Colombia
| | - Derek J Hansford
- Department of Biomedical Engineering, The Ohio State University , 1080 Carmack Road, Columbus, Ohio 43210, United States
| | - Maria H Fernandes
- Laboratory for Bone Metabolism and Regeneration, Faculdade de Medicina Dentária, Universidade do Porto , Rua Dr. Manuel Pereira da Silva, 4200-393 Porto, Portugal
| | - Fernando J Monteiro
- i3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto , Rua Alfredo Allen, 208 4200-135 Porto, Portugal
- INEB-Instituto de Engenharia Biomédica, Universidade do Porto , Rua Alfredo Allen, 208 4200-135 Porto, Portugal
- Faculdade de Engenharia, Departamento de Engenharia Metalúrgica e Materiais, Universidade do Porto , Rua Dr Roberto Frias, s/n, 4200-465 Porto, Portugal
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Bone Anabolic Effects of Soluble Si: In Vitro Studies with Human Mesenchymal Stem Cells and CD14+ Osteoclast Precursors. Stem Cells Int 2015; 2016:5653275. [PMID: 26798359 PMCID: PMC4699026 DOI: 10.1155/2016/5653275] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 09/08/2015] [Indexed: 01/03/2023] Open
Abstract
Silicon (Si) is indispensable for many cellular processes including bone tissue metabolism. In this work, the effects of Si on human osteogenesis and osteoclastogenesis were characterized. Human mesenchymal stem cells (hMSC) and CD14+ stem cells, as osteoblast and osteoclast precursors, were treated with a wide range of Si concentrations, covering the physiological plasma levels. Si promoted a dose-dependent increase in hMSC proliferation, differentiation, and function, at levels similar to the normal basal plasma levels. Additionally, a decrease in the expression of the osteoclastogenic activators M-CSF and RANKL was observed. Also, Si elicited a decrease in osteoclastogenesis, which became significant at higher concentrations, as those observed after meals. Among the intracellular mechanisms studied, an upregulation of MEK and PKC signalling pathways was observed in both cell types. In conclusion, Si appears to have a direct positive effect on human osteogenesis, at basal plasma levels. On the other hand, it also seemed to be an inhibitor of osteoclastogenesis, but at higher concentrations, though yet in the physiological range. Further, an indirect effect of Si on osteoclastogenesis may also occur, through a downregulation of M-CSF and RANKL expression by osteoblasts. Thus, Si may be an important player in bone anabolic regenerative approaches.
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Effect of Different Endodontic Regeneration Protocols on Wettability, Roughness, and Chemical Composition of Surface Dentin. J Endod 2015; 41:956-60. [DOI: 10.1016/j.joen.2015.02.023] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 02/04/2015] [Accepted: 02/15/2015] [Indexed: 11/20/2022]
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Nerness AZ, Ehrlich Y, Spolnik K, Platt JA, Yassen GH. Effect of triple antibiotic paste with or without ethylenediaminetetraacetic acid on surface loss and surface roughness of radicular dentine. Odontology 2015; 104:170-5. [DOI: 10.1007/s10266-014-0191-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Accepted: 12/15/2014] [Indexed: 10/24/2022]
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Laranjeira MS, Carvalho Â, Pelaez-Vargas A, Hansford D, Ferraz MP, Coimbra S, Costa E, Santos-Silva A, Fernandes MH, Monteiro FJ. Modulation of human dermal microvascular endothelial cell and human gingival fibroblast behavior by micropatterned silica coating surfaces for zirconia dental implant applications. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2014; 15:025001. [PMID: 27877662 PMCID: PMC5090413 DOI: 10.1088/1468-6996/15/2/025001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Revised: 03/07/2014] [Accepted: 02/09/2014] [Indexed: 05/15/2023]
Abstract
Dental ceramic implants have shown superior esthetic behavior and the absence of induced allergic disorders when compared to titanium implants. Zirconia may become a potential candidate to be used as an alternative to titanium dental implants if surface modifications are introduced. In this work, bioactive micropatterned silica coatings were produced on zirconia substrates, using a combined methodology of sol-gel processing and soft lithography. The aim of the work was to compare the in vitro behavior of human gingival fibroblasts (HGFs) and human dermal microvascular endothelial cells (HDMECs) on three types of silica-coated zirconia surfaces: flat and micropatterned (with pillars and with parallel grooves). Our results showed that cells had a higher metabolic activity (HGF, HDMEC) and increased gene expression levels of fibroblast-specific protein-1 (FSP-1) and collagen type I (COL I) on surfaces with pillars. Nevertheless, parallel grooved surfaces were able to guide cell growth. Even capillary tube-like networks of HDMEC were oriented according to the surface geometry. Zirconia and silica with different topographies have shown to be blood compatible and silica coating reduced bacteria adhesion. All together, the results indicated that microstructured bioactive coating seems to be an efficient strategy to improve soft tissue integration on zirconia implants, protecting implants from peri-implant inflammation and improving long-term implant stabilization. This new approach of micropatterned silica coating on zirconia substrates can generate promising novel dental implants, with surfaces that provide physical cues to guide cells and enhance their behavior.
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Affiliation(s)
- Marta S Laranjeira
- INEB—Instituto Engenharia Biomédica, Universidade do Porto, Porto, Portugal
- Faculdade de Engenharia, DEMM, Universidade do Porto, Porto, Portugal
| | - Ângela Carvalho
- INEB—Instituto Engenharia Biomédica, Universidade do Porto, Porto, Portugal
- Faculdade de Engenharia, DEMM, Universidade do Porto, Porto, Portugal
| | | | - Derek Hansford
- Department of Biomedical Engineering (BME), Ohio State University, Columbus, OH, USA
| | - Maria Pia Ferraz
- INEB—Instituto Engenharia Biomédica, Universidade do Porto, Porto, Portugal
- Laboratory CEBIMED—Centro de Estudos em Biomedicina, Universidade Fernando Pessoa, Porto, Portugal
| | - Susana Coimbra
- IBMC—Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
- CESPU—Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde, Gandra-PRD, Portugal
| | - Elísio Costa
- IBMC—Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
- Departamento de Ciências Biológicas-Serviço de Bioquímica, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal
| | - Alice Santos-Silva
- IBMC—Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
- Departamento de Ciências Biológicas-Serviço de Bioquímica, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal
| | - Maria Helena Fernandes
- Laboratory for Bone Metabolism and Regeneration, Faculdade de Medicina Dentária, Universidade do Porto, Porto, Portugal
| | - Fernando Jorge Monteiro
- INEB—Instituto Engenharia Biomédica, Universidade do Porto, Porto, Portugal
- Faculdade de Engenharia, DEMM, Universidade do Porto, Porto, Portugal
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Ye D, Peramo A. Implementing tissue engineering and regenerative medicine solutions in medical implants. Br Med Bull 2014; 109:3-18. [PMID: 24357734 DOI: 10.1093/bmb/ldt036] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
BACKGROUND Surgical implants are widely used in the medical field but their long-term performance is limited due to failure of integration with tissues. This manuscript describes very well-known problems associated with implants and discusses novel solutions used in tissue engineering and regenerative medicine that can be implemented in this uncommonly discussed medical area. SOURCES OF DATA General and medical literature describing modifications of medical and surgical implants, biofunctionalization, tissue engineering and regenerative medicine. AREAS OF AGREEMENT Procedures for surgical implantation have grown substantially in the last few decades and provided improved quality of life for patients, regardless of area of implantation and device type and purpose. AREAS OF CONTROVERSY In general, implants fail because of lack of long-term integration with the surrounding tissues. Implant manufacturers have not addressed implant failure from the point of view of biointegration. In addition, some medical practitioners are inclined to treat implant failure by using anti-infection methods to prevent bacterial adhesion. However, both approaches are conceptually limited, as discussed in this manuscript. GROWING POINTS Implantation in the future will not be limited to medically needed procedures but also to a growing number of cosmetic body transformation procedures, which may include perceived 'improved implant functions' over natural tissues or organs. An additional trend is that implant procedures are being progressively performed in younger individuals. AREAS TIMELY FOR DEVELOPING RESEARCH Current implants generally do not allow the physician to have controlled long-term access to internal tissues in contact with the implants, for example to release specific compounds when medically needed to the problem area.
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Affiliation(s)
- Dongxia Ye
- Shanghai Ninth People's Hospital Affiliated to Medical School of Shanghai Jiaotong University, Shanghai, China
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