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Makarov VB, Dedukh NV, Nikolchenko OA. FEATURES OF BONE REMODELING AROUND SURFACE-MODIFIED TITANIUM AND TANTALUM IMPLANTS. WIADOMOSCI LEKARSKIE (WARSAW, POLAND : 1960) 2023; 76:1790-1796. [PMID: 37740972 DOI: 10.36740/wlek202308113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/25/2023]
Abstract
OBJECTIVE The aim: To study the osseointegrative properties of titanium and tantalum implants with different surface structures in animal experiments. PATIENTS AND METHODS Materials and methods: The histological and morphometric study was carried out on 60 male white rats after titanium implants with different surface structures made by 3D printed technology were inserted in the distal femur bone: presented by the multilayered layers of interlacing pores of 300 microns (series 1); rough (> 2 microns) (series 2); and tantalum implants with 300 microns pores and 80% porosity (series 3) as control material. RESULTS Results: On the 30 days we found statistically significant differences in the bone-implant contact rate between the 2nd experiment series (44.77 ± 1.86)% and 1st (59.91 ± 2.86)% (p=0.000047) and 3rd (53.89 ± 2.11)% (р=0.000065), on the 90 days between the 2nd experiment series (51.26 ± 2.7)% and 1st (66.84 ± 2.63)% (p=0.000187) and 3rd (70.35 ± 4.32)% (p=0.000349). There was a difference between the indices of the bone-implant volume at day 90 between the 1st (48.43 ± 2.2)% and 2nd (36.88 ± 2.56)% series (p=0.000919), between the 2nd and 3rd series (51.2 ± 3.06)% (p=0.000107). There were no significant differences between the studied indices in the 1st and 3rd series of the experiment. CONCLUSION Conclusions: Titanium implants with multilayered interlaced pore layers of 300 microns and tantalum with 300 microns pore size and 80% porosity may be promising. Rough-surface titanium also has osseointegrative qualities, but they are lower compared to other materials.
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Affiliation(s)
| | - Ninel V Dedukh
- D.F. CHEBOTAREV INSTITUTE OF GERONTOLOGY OF THE NATIONAL ACADEMY OF MEDICAL SCIENCES OF UKRAINE, KYIV, UKRAINE
| | - Olga A Nikolchenko
- SYTENKO INSTITUTE OF SPINE AND JOINT PATHOLOGY OF THE NATIONAL ACADEMY OF MEDICAL SCIENCES OF UKRAINE, KHARKIV, UKRAINE
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Villapun Puzas VM, Carter LN, Schröder C, Colavita PE, Hoey DA, Webber MA, Addison O, Shepherd DET, Attallah MM, Grover LM, Cox SC. Surface Free Energy Dominates the Biological Interactions of Postprocessed Additively Manufactured Ti-6Al-4V. ACS Biomater Sci Eng 2022; 8:4311-4326. [PMID: 36127820 PMCID: PMC9554875 DOI: 10.1021/acsbiomaterials.2c00298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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Additive manufacturing (AM) has emerged as a disruptive
technique
within healthcare because of its ability to provide personalized devices;
however, printed metal parts still present surface and microstructural
defects, which may compromise mechanical and biological interactions.
This has made physical and/or chemical postprocessing techniques essential
for metal AM devices, although limited fundamental knowledge is available
on how alterations in physicochemical properties influence AM biological
outcomes. For this purpose, herein, powder bed fusion Ti-6Al-4V samples
were postprocessed with three industrially relevant techniques: polishing,
passivation, and vibratory finishing. These surfaces were thoroughly
characterized in terms of roughness, chemistry, wettability, surface
free energy, and surface ζ-potential. A significant increase
in Staphylococcus epidermidis colonization
was observed on both polished and passivated samples, which was linked
to high surface free energy donor γ– values
in the acid–base, γAB component. Early osteoblast
attachment and proliferation (24 h) were not influenced by these properties,
although increased mineralization was observed for both these samples.
In contrast, osteoblast differentiation on stainless steel was driven
by a combination of roughness and chemistry. Collectively, this study
highlights that surface free energy is a key driver between AM surfaces
and cell interactions. In particular, while low acid–base components
resulted in a desired reduction in S. epidermidis colonization, this was followed by reduced mineralization. Thus,
while surface free energy can be used as a guide to AM device development,
optimization of bacterial and mammalian cell interactions should be
attained through a combination of different postprocessing techniques.
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Affiliation(s)
| | - Luke N Carter
- School of Chemical Engineering, University of Birmingham, Edgbaston B15 2TT, U.K
| | - Christian Schröder
- School of Chemistry, CRANN and AMBER Research Centres, Trinity College Dublin, College Green, Dublin 2 D02 PN4, Ireland
| | - Paula E Colavita
- School of Chemistry, CRANN and AMBER Research Centres, Trinity College Dublin, College Green, Dublin 2 D02 PN4, Ireland
| | - David A Hoey
- Trinity Biomedical Sciences Institute, Trinity College, Trinity Centre for Biomedical Engineering, Dublin D02 R590, Ireland.,Department of Mechanical Manufacturing and Biomedical Engineering, School of Engineering, Trinity College, Dublin D02 DK07, Ireland
| | - Mark A Webber
- Quadram Institute Bioscience, Norwich Research Park, Colney NR4 7UQ, U.K.,Norwich Medical School, University of East Anglia, Norwich Research Park, Colney NR4 7TJ, U.K
| | - Owen Addison
- Faculty of Dentistry, Oral and Craniofacial Sciences, King's College London, London SE1 9RT, U.K
| | | | - Moataz M Attallah
- School of Materials and Metallurgy, University of Birmingham, Edgbaston B15 2TT, U.K
| | - Liam M Grover
- School of Chemical Engineering, University of Birmingham, Edgbaston B15 2TT, U.K
| | - Sophie C Cox
- School of Chemical Engineering, University of Birmingham, Edgbaston B15 2TT, U.K
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Adel IM, ElMeligy MF, Elkasabgy NA. Conventional and Recent Trends of Scaffolds Fabrication: A Superior Mode for Tissue Engineering. Pharmaceutics 2022; 14:306. [DOI: https:/doi.org/10.3390/pharmaceutics14020306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023] Open
Abstract
Tissue regeneration is an auto-healing mechanism, initiating immediately following tissue damage to restore normal tissue structure and function. This falls in line with survival instinct being the most dominant instinct for any living organism. Nevertheless, the process is slow and not feasible in all tissues, which led to the emergence of tissue engineering (TE). TE aims at replacing damaged tissues with new ones. To do so, either new tissue is being cultured in vitro and then implanted, or stimulants are implanted into the target site to enhance endogenous tissue formation. Whichever approach is used, a matrix is used to support tissue growth, known as ‘scaffold’. In this review, an overall look at scaffolds fabrication is discussed, starting with design considerations and different biomaterials used. Following, highlights of conventional and advanced fabrication techniques are attentively presented. The future of scaffolds in TE is ever promising, with the likes of nanotechnology being investigated for scaffold integration. The constant evolvement of organoids and biofluidics with the eventual inclusion of organ-on-a-chip in TE has shown a promising prospect of what the technology might lead to. Perhaps the closest technology to market is 4D scaffolds following the successful implementation of 4D printing in other fields.
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Conventional and Recent Trends of Scaffolds Fabrication: A Superior Mode for Tissue Engineering. Pharmaceutics 2022; 14:pharmaceutics14020306. [PMID: 35214038 PMCID: PMC8877304 DOI: 10.3390/pharmaceutics14020306] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/19/2022] [Accepted: 01/24/2022] [Indexed: 12/16/2022] Open
Abstract
Tissue regeneration is an auto-healing mechanism, initiating immediately following tissue damage to restore normal tissue structure and function. This falls in line with survival instinct being the most dominant instinct for any living organism. Nevertheless, the process is slow and not feasible in all tissues, which led to the emergence of tissue engineering (TE). TE aims at replacing damaged tissues with new ones. To do so, either new tissue is being cultured in vitro and then implanted, or stimulants are implanted into the target site to enhance endogenous tissue formation. Whichever approach is used, a matrix is used to support tissue growth, known as ‘scaffold’. In this review, an overall look at scaffolds fabrication is discussed, starting with design considerations and different biomaterials used. Following, highlights of conventional and advanced fabrication techniques are attentively presented. The future of scaffolds in TE is ever promising, with the likes of nanotechnology being investigated for scaffold integration. The constant evolvement of organoids and biofluidics with the eventual inclusion of organ-on-a-chip in TE has shown a promising prospect of what the technology might lead to. Perhaps the closest technology to market is 4D scaffolds following the successful implementation of 4D printing in other fields.
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Blanc-Sylvestre N, Bouchard P, Chaussain C, Bardet C. Pre-Clinical Models in Implant Dentistry: Past, Present, Future. Biomedicines 2021; 9:1538. [PMID: 34829765 PMCID: PMC8615291 DOI: 10.3390/biomedicines9111538] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/11/2021] [Accepted: 10/15/2021] [Indexed: 12/23/2022] Open
Abstract
Biomedical research seeks to generate experimental results for translation to clinical settings. In order to improve the transition from bench to bedside, researchers must draw justifiable conclusions based on data from an appropriate model. Animal testing, as a prerequisite to human clinical exposure, is performed in a range of species, from laboratory mice to larger animals (such as dogs or non-human primates). Minipigs appear to be the animal of choice for studying bone surgery around intraoral dental implants. Dog models, well-known in the field of dental implant research, tend now to be used for studies conducted under compromised oral conditions (biofilm). Regarding small animal models, research studies mostly use rodents, with interest in rabbit models declining. Mouse models remain a reference for genetic studies. On the other hand, over the last decade, scientific advances and government guidelines have led to the replacement, reduction, and refinement of the use of all animal models in dental implant research. In new development strategies, some in vivo experiments are being progressively replaced by in vitro or biomaterial approaches. In this review, we summarize the key information on the animal models currently available for dental implant research and highlight (i) the pros and cons of each type, (ii) new levels of decisional procedures regarding study objectives, and (iii) the outlook for animal research, discussing possible non-animal options.
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Affiliation(s)
- Nicolas Blanc-Sylvestre
- Université de Paris, Institut des Maladies Musculo-Squelettiques, Orofacial Pathologies, Imaging and Biotherapies Laboratory URP2496 and FHU-DDS-Net, Dental School, and Plateforme d’Imagerie du Vivant (PIV), 92120 Montrouge, France; (N.B.-S.); (P.B.); (C.C.)
- AP-HP, Department of Periodontology, Rothschild Hospital, European Postgraduate in Periodontology and Implantology, Université de Paris, 75012 Paris, France
| | - Philippe Bouchard
- Université de Paris, Institut des Maladies Musculo-Squelettiques, Orofacial Pathologies, Imaging and Biotherapies Laboratory URP2496 and FHU-DDS-Net, Dental School, and Plateforme d’Imagerie du Vivant (PIV), 92120 Montrouge, France; (N.B.-S.); (P.B.); (C.C.)
- AP-HP, Department of Periodontology, Rothschild Hospital, European Postgraduate in Periodontology and Implantology, Université de Paris, 75012 Paris, France
| | - Catherine Chaussain
- Université de Paris, Institut des Maladies Musculo-Squelettiques, Orofacial Pathologies, Imaging and Biotherapies Laboratory URP2496 and FHU-DDS-Net, Dental School, and Plateforme d’Imagerie du Vivant (PIV), 92120 Montrouge, France; (N.B.-S.); (P.B.); (C.C.)
- AP-HP, Reference Center for Rare Disorders of the Calcium and Phosphate Metabolism, Dental Medicine Department, Bretonneau Hospital, GHN-Université de Paris, 75018 Paris, France
| | - Claire Bardet
- Université de Paris, Institut des Maladies Musculo-Squelettiques, Orofacial Pathologies, Imaging and Biotherapies Laboratory URP2496 and FHU-DDS-Net, Dental School, and Plateforme d’Imagerie du Vivant (PIV), 92120 Montrouge, France; (N.B.-S.); (P.B.); (C.C.)
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Osteosphere Model to Evaluate Cell-Surface Interactions of Implantable Biomaterials. MATERIALS 2021; 14:ma14195858. [PMID: 34640255 PMCID: PMC8510223 DOI: 10.3390/ma14195858] [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: 08/15/2021] [Revised: 09/28/2021] [Accepted: 09/30/2021] [Indexed: 01/01/2023]
Abstract
Successful biomaterials for bone tissue therapy must present different biocompatible properties, such as the ability to stimulate the migration and proliferation of osteogenic cells on the implantable surface, to increase attachment and avoid the risks of implant movement after surgery. The present work investigates the applicability of a three-dimensional (3D) model of bone cells (osteospheres) in the evaluation of osteoconductive properties of different implant surfaces. Three different titanium surface treatments were tested: machined (MA), sandblasting and acid etching (BE), and Hydroxyapatite coating by plasma spray (PSHA). The surfaces were characterized by Scanning Electron Microscopy (SEM) and atomic force microscopy (AFM), confirming that they present very distinct roughness. After seeding the osteospheres, cell–surface interactions were studied in relation to cell proliferation, migration, and spreading. The results show that BE surfaces present higher densities of cells, leaving the aggregates towards than titanium surfaces, providing more evidence of migration. The PSHA surface presented the lowest performance in all analyses. The results indicate that the 3D model allows the focal analysis of an in vitro cell/surfaces interaction of cells and surfaces. Moreover, by demonstrating the agreement with the clinical data observed in the literature, they suggest a potential use as a predictive preclinical tool for investigating osteoconductive properties of novel biomaterials for bone therapy.
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Interaction between Different Implant Surfaces and Liquid Fibrinogen: A Pilot In Vitro Experiment. BIOMED RESEARCH INTERNATIONAL 2021; 2021:9996071. [PMID: 34307687 PMCID: PMC8282385 DOI: 10.1155/2021/9996071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 05/24/2021] [Indexed: 11/17/2022]
Abstract
Background Platelet concentrates like leucocyte- and platelet-rich fibrin (L-PRF) have been widely evaluated in different oral surgical procedures to promote the healing process. However, liquid L-PRF products such as liquid fibrinogen have been poorly explored, especially in the biomimetic functionalization of dental implants. The aim of this in vitro study is to evaluate the interaction between 5 different dental implant surfaces and liquid fibrinogen. Methods Five commercially available dental implants with different surfaces (Osseospeed™, TiUnite™, SLActive®, Ossean®, and Plenum®) were immersed for 60 minutes in liquid fibrinogen obtained from healthy donors. After this period, the implants were removed and fixed for scanning electron microscopy (SEM). Results All dental implants were covered by a fibrin mesh. However, noticeable noncontact areas were observed for the Osseospeed™, TiUnite™, and SLActive® surfaces. On the other hand, Ossean® and Plenum® surfaces showed a dense and uniform layer of fibrin covering almost the entire implant surface. The Osseospeed™, TiUnite™, and SLActive® surfaces presented with lower blood cell numbers inside the fibrin mesh compared with the others. Moreover, at higher magnification, thicker fibrin fibers were observed in contact with Ossean® and Plenum® surfaces. The Plenum ®surface showed the thickest fibers which also inserted and interconnect to the microroughness. Conclusion The initial contact between an implant surface and the fibrin network differs significantly among different implant brands. Further studies are necessary to explore the clinical impact of these observations in the osseointegration process of dental implants.
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Extracellular-Vesicle-Based Coatings Enhance Bioactivity of Titanium Implants-SurfEV. NANOMATERIALS 2021; 11:nano11061445. [PMID: 34072581 PMCID: PMC8227988 DOI: 10.3390/nano11061445] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 05/20/2021] [Accepted: 05/25/2021] [Indexed: 01/08/2023]
Abstract
Extracellular vesicles (EVs) are nanoparticles released by cells that contain a multitude of biomolecules, which act synergistically to signal multiple cell types. EVs are ideal candidates for promoting tissue growth and regeneration. The tissue regenerative potential of EVs raises the tantalizing possibility that immobilizing EVs on implant surfaces could potentially generate highly bioactive and cell-instructive surfaces that would enhance implant integration into the body. Such surfaces could address a critical limitation of current implants, which do not promote bone tissue formation or bond bone. Here, we developed bioactive titanium surface coatings (SurfEV) using two types of EVs: secreted by decidual mesenchymal stem cells (DEVs) and isolated from fermented papaya fluid (PEVs). For each EV type, we determined the size, morphology, and molecular composition. High concentrations of DEVs enhanced cell proliferation, wound closure, and migration distance of osteoblasts. In contrast, the cell proliferation and wound closure decreased with increasing concentration of PEVs. DEVs enhanced Ca/P deposition on the titanium surface, which suggests improvement in bone bonding ability of the implant (i.e., osteointegration). EVs also increased production of Ca and P by osteoblasts and promoted the deposition of mineral phase, which suggests EVs play key roles in cell mineralization. We also found that DEVs stimulated the secretion of secondary EVs observed by the presence of protruding structures on the cell membrane. We concluded that, by functionalizing implant surfaces with specialized EVs, we will be able to enhance implant osteointegration by improving hydroxyapatite formation directly at the surface and potentially circumvent aseptic loosening of implants.
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Zhu M, Zhang K, Feng L, Lin S, Pan Q, Bian L, Li G. Surface decoration of development-inspired synthetic N-cadherin motif via Ac-BP promotes osseointegration of metal implants. Bioact Mater 2021; 6:1353-1364. [PMID: 33210028 PMCID: PMC7658495 DOI: 10.1016/j.bioactmat.2020.11.002] [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: 07/08/2020] [Revised: 10/25/2020] [Accepted: 11/01/2020] [Indexed: 02/08/2023] Open
Abstract
Research works on the synergistic effect of surface modified bioactive molecules and bone metal implants have been highlighted. N-cadherin is regarded as a key factor in directing cell-cell interactions during the mesenchymal condensation preceding the osteogenesis in the musculoskeletal system. In this study, the N-cadherin mimetic peptide (Cad) was biofunctionalized on the titanium metal surface via the acryloyl bisphosphonate (Ac-BP). To learn the synergistic effect of N-cadherin mimetic peptide, when tethered with titanium substrates, on promoting osteogenic differentiation of the seeded human mesenchymal stem cells (hMSCs) and the osseointegration at the bone-implant interfaces. Results show that the conjugation of N-cadherin mimetic peptide with Ac-BP promoted the osteogenic gene markers expression in the hMSCs. The biofunctionalized biomaterial surfaces promote the expression of the Wnt/β-catenin downstream axis in the attached hMSCs, and then enhance the in-situ bone formation and osseointegration at the bone-implant interfaces. We conclude that this N-cadherin mimetic peptide tethered on Ti surface promote osteogenic differentiation of hMSCs and osseointegration of biomaterial implants in vitro and in vivo. These findings demonstrate the importance of the development-inspired surface bioactivation of metal implants and shed light on the possible cellular mechanisms of the enhanced osseointegration.
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Affiliation(s)
- Meiling Zhu
- Department of Orthopaedics & Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, SAR, PR China
- Stem Cells and Regenerative Medicine Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, SAR, Hong Kong, PR China
- The Eighth Affiliated Hospital, Sun Yat-Sen University, Shenzhen, PR China
| | - Kunyu Zhang
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Hong Kong, SAR, PR China
| | - Lu Feng
- Department of Orthopaedics & Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, SAR, PR China
- Stem Cells and Regenerative Medicine Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, SAR, Hong Kong, PR China
| | - Sien Lin
- Department of Orthopaedics & Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, SAR, PR China
- Stem Cells and Regenerative Medicine Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, SAR, Hong Kong, PR China
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, PR China
| | - Qi Pan
- Department of Orthopaedics & Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, SAR, PR China
- Stem Cells and Regenerative Medicine Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, SAR, Hong Kong, PR China
| | - Liming Bian
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Hong Kong, SAR, PR China
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, PR China
- Centre of Novel Biomaterials, The Chinese University of Hong Kong, Hong Kong, SAR, PR China
| | - Gang Li
- Department of Orthopaedics & Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, SAR, PR China
- Stem Cells and Regenerative Medicine Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, SAR, Hong Kong, PR China
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, PR China
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Zhou W, Yan J, Li Y, Wang L, Jing L, Li M, Yu S, Cheng Y, Zheng Y. Based on the synergistic effect of Mg 2+ and antibacterial peptides to improve the corrosion resistance, antibacterial ability and osteogenic activity of magnesium-based degradable metals. Biomater Sci 2021; 9:807-825. [PMID: 33210105 DOI: 10.1039/d0bm01584a] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
To overcome the restricted degradation, poor antiacterial and osteoindctive problems of magnesium and its alloys, this study presented the spinning coating of an antimicrobial peptide (AP)-loaded silk fibroin (SF) composite onto a corrosion-resistant MgO-coated AZ31 Mg alloy via anodization (aMgO) and electrodeposition (eMgO) methods. The composite coatings not only created a smooth and hydrophilic surface, but also obviously improved the corrosion resistance according to the test of corrosion potential and current density. The colonization of E. coli on MgO-AP composite coatings was significantly reduced as compared to the MgO layers, due to the potential synergetic effects of APs and Mg2+. Compared with the bare AZ31, the composite coating inhibited the corrosion of the substrate and the release of Mg2+, supported the adhesion, spreading and proliferation of osteoblasts, and presented a significantly improved osteogenic differentiation trend. Therefore, the MgO-AP composite coating, which had both antibacterial and bone-promoting abilities, was expected to be applied for surface modification of magnesium alloy implants to solve the clinical problems of bacterial infection and poor osseointegration.
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Affiliation(s)
- Wenhao Zhou
- Shaanxi Key Laboratory of biomedical metal materials, Northwest Institute for Non-ferrous Metal Research, Xi'an 710016, P R China.
| | - Jianglong Yan
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China.
| | - Yangyang Li
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China.
| | - Lan Wang
- Shaanxi Key Laboratory of biomedical metal materials, Northwest Institute for Non-ferrous Metal Research, Xi'an 710016, P R China.
| | - Lei Jing
- Shaanxi Key Laboratory of biomedical metal materials, Northwest Institute for Non-ferrous Metal Research, Xi'an 710016, P R China.
| | - Ming Li
- China-America Institute of Neuroscience, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - Sen Yu
- Shaanxi Key Laboratory of biomedical metal materials, Northwest Institute for Non-ferrous Metal Research, Xi'an 710016, P R China.
| | - Yan Cheng
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China.
| | - Yufeng Zheng
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China.
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Ghezzi B, Lagonegro P, Attolini G, Rotonda PM, Cornelissen C, Ponraj JS, Parisi L, Passeri G, Rossi F, Macaluso GM. Hydrogen plasma treatment confers enhanced bioactivity to silicon carbide-based nanowires promoting osteoblast adhesion. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 121:111772. [PMID: 33579438 DOI: 10.1016/j.msec.2020.111772] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 10/30/2020] [Accepted: 11/26/2020] [Indexed: 12/25/2022]
Abstract
Nanomaterials play a pivotal role in modern regenerative medicine and tissue engineering, due to their peculiar physical, optical and biological properties once they are used in the nanometric size. Many evidences are showing the importance of biomaterial micro- and nano-topography on cellular adhesion, proliferation and differentiation, and hence, tissue regeneration. It is well known that nanowires (NWs) can mimic many different tissues as a result of their shape and their surface characteristics, and that surface hydrophilicity affects early protein adsorption and cellular adhesion. Therefore a material able to induce bone regeneration might be obtained by combining optimal surface topography and hydrophilicity. Based on these evidence, we designed silicon carbide (SiC) and core/shell silicon carbide/silicon dioxide (SiC/SiOx) nanowires with modified wettability in order to analyze cell behavior, using an in-vitro osteoblastic model. First, we synthetized SiC NWs and SiC/SiOx NWs through a chemical-vapour-deposition (CVD) process, and then we used hydrogen plasma to modify their hydrophilicity. Subsequently we evaluated the four types of NWs in terms of their morphology and contact angle, and we studied their behavior in the presence of MC3T3-E1 murine osteoblasts. Cell metabolic activity, viability, morphology and focal adhesions formation were considered. Morphological data showed different dimensions between SiC and SiC/SiOx NWs. SiC NWs before the hydrogen plasma treatment showed a very low contact angle, that was absent after the treatment. Osteoblastic cells appeared healthy on all of the samples. Interestingly, both hydrophilic SiC NWs and SiC/SiOx NWs generated a favorable distribution of focal adhesions around the cell body confirmed also by scanning electron microscopy images. Moreover, osteoblasts grown on hydrogen plasma treated SiC/SiOx NWs showed an increased metabolic activity testified by a significantly higher cell number. In conclusion, we are here demonstrating that hydrogen plasma treatment of SiC and SiC/SiOx NWs induce a better osteoblastic cellular adhesion by increasing NWs wettability. We are therefore suggesting that hydrogen plasma treatment of SiC/SiOx can offer a suitable method to develop scaffolds for bone tissue engineering applications.
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Affiliation(s)
- Benedetta Ghezzi
- Centro Universitario di Odontoiatria, Università di Parma, Via Gramsci 14, 43126 Parma, Italy; Dipartimento di Medicina e Chirurgia, Università degli Studi di Parma, via Gramsci 14, 43126 Parma, Italy
| | - Paola Lagonegro
- SCITEC-CNR, Istituto di Scienze e Tecnologie Chimiche "Giulio Natta", Via Corti, 12, 20133 Milano, Italy.
| | - Giovanni Attolini
- IMEM-CNR Institute, Parco Area delle Scienze 37A, 43124 Parma, Italy
| | | | | | - Joice Sophia Ponraj
- International Iberian Nanotechnology Laboratory, Avenida Mestre José Veiga s/n, 4715-330 Braga. Portugal
| | - Ludovica Parisi
- Centro Universitario di Odontoiatria, Università di Parma, Via Gramsci 14, 43126 Parma, Italy; Dipartimento di Medicina e Chirurgia, Università degli Studi di Parma, via Gramsci 14, 43126 Parma, Italy; Laboratory for Oral Molecular Biology, Department of Orthodontics and Dentofacial Orthopedics, School of Dental Medicine, University of Bern, Freiburgstrasse 3, 3010, Bern, Switzerland
| | - Giovanni Passeri
- Dipartimento di Medicina e Chirurgia, Università degli Studi di Parma, via Gramsci 14, 43126 Parma, Italy
| | - Francesca Rossi
- IMEM-CNR Institute, Parco Area delle Scienze 37A, 43124 Parma, Italy
| | - Guido Maria Macaluso
- Centro Universitario di Odontoiatria, Università di Parma, Via Gramsci 14, 43126 Parma, Italy; Dipartimento di Medicina e Chirurgia, Università degli Studi di Parma, via Gramsci 14, 43126 Parma, Italy; IMEM-CNR Institute, Parco Area delle Scienze 37A, 43124 Parma, Italy
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Development of a Surface-Functionalized Titanium Implant for Promoting Osseointegration: Surface Characteristics, Hemocompatibility, and In Vivo Evaluation. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10238582] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This study aimed to evaluate the impact of surface-modified biomedical titanium (Ti) dental implant on osseointegration. The surfaces were modified using an innovative dip-coating technique (IDCT; sandblasted, large-grit, and acid-etched, then followed by coating with the modified pluronic F127 biodegradable polymer). The surface morphology and hemocompatibility evaluations were investigated by field-emission scanning electron microscopy, while the contact analysis was observed by goniometer. The IDCT-modified Ti implant was also implanted in patients with missing teeth by single-stage surgical procedure then observed immediately and again four months after placement by cone-beam computerized tomography (CBCT) imaging. It was found that the IDCT-modified Ti implant was rougher than the dental implant without surface modification. Contact angle analysis showed the IDCT-modified Ti implant was lower than the dental implant without surface modification. The hemocompatibility evaluations showed greater red blood cell aggregation and fibrin filament formation on the IDCT-modified Ti implant. The radiographic and CBCT image displayed new bone formation at four months after the IDCT-modified Ti implant placement. Therefore, this study suggests that the IDCT-modified Ti dental implant has great potential to accelerate osseointegration.
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13
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3D printed porous PEEK created via fused filament fabrication for osteoconductive orthopaedic surfaces. J Mech Behav Biomed Mater 2020; 109:103850. [DOI: 10.1016/j.jmbbm.2020.103850] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 05/05/2020] [Indexed: 02/01/2023]
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Mohanram Y, Zhang J, Tsiridis E, Yang XB. Comparing bone tissue engineering efficacy of HDPSCs, HBMSCs on 3D biomimetic ABM-P-15 scaffolds in vitro and in vivo. Cytotechnology 2020; 72:715-730. [PMID: 32820463 PMCID: PMC7548016 DOI: 10.1007/s10616-020-00414-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 07/19/2020] [Indexed: 02/06/2023] Open
Abstract
Human bone marrow mesenchymal stem cells (HBMSCs) has been the gold standard for bone regeneration. However, the low proliferation rate and long doubling time limited its clinical applications. This study aims to compare the bone tissue engineering efficacy of human dental pulp stem cells (HDPSCs) with HBMSCs in 2D, and 3D anorganic bone mineral (ABM) coated with a biomimetic collagen peptide (ABM-P-15) for improving bone-forming speed and efficacy in vitro and in vivo. The multipotential of both HDPSCs and HBMSCs have been compared in vitro. The bone formation of HDPSCs on ABM-P-15 was tested using in vivo model. The osteogenic potential of the cells was confirmed by alkaline phosphatase (ALP) and immunohistological staining for osteogenic markers. Enhanced ALP, collagen, lipid droplet, or glycosaminoglycans production were visible in HDPSCs and HBMSCs after osteogenic, adipogenic and chondrogenic induction. HDPSC showed stronger ALP staining compared to HBMSCs. Confocal images showed more viable HDPSCs on both ABM-P-15 and ABM scaffolds compared to HBMSCs on similar scaffolds. ABM-P-15 enhanced cell attachment/spreading/bridging formation on ABM-P-15 scaffolds and significantly increased quantitative ALP specific activities of the HDPSCs and HBMSCs. After 8 weeks in vivo implantation in diffusion chamber model, the HDPSCs on ABM-P-15 scaffolds showed extensive high organised collagenous matrix formation that was positive for COL-I and OCN compared to ABM alone. In conclusion, the HDPSCs have a higher proliferation rate and better osteogenic capacity, which indicated the potential of combining HDPSCs with ABM-P-15 scaffolds for improving bone regeneration speed and efficacy.
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Affiliation(s)
- Yamuna Mohanram
- Biomaterials & Tissue Engineering Group, Department of Oral Biology, School of Dentistry, University of Leeds, Level 7, Wellcome Trust Brenner Building, St. James's University Hospital, Leeds, LS9 7TF, UK
| | - Jingying Zhang
- Biomaterials & Tissue Engineering Group, Department of Oral Biology, School of Dentistry, University of Leeds, Level 7, Wellcome Trust Brenner Building, St. James's University Hospital, Leeds, LS9 7TF, UK.,The Second Clinical Medical College, Guangdong Medical University, Dongguan, 523808, Guangdong, China
| | - Eleftherios Tsiridis
- Academic Orthopaedic Department, Aristotle University Medical School, 54124, Thessaloniki, Greece
| | - Xuebin B Yang
- Biomaterials & Tissue Engineering Group, Department of Oral Biology, School of Dentistry, University of Leeds, Level 7, Wellcome Trust Brenner Building, St. James's University Hospital, Leeds, LS9 7TF, UK.
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Li Q, Shen A, Wang Z. Enhanced osteogenic differentiation of BMSCs and M2-phenotype polarization of macrophages on a titanium surface modified with graphene oxide for potential implant applications. RSC Adv 2020; 10:16537-16550. [PMID: 35498860 PMCID: PMC9052948 DOI: 10.1039/c9ra10563h] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 02/06/2020] [Indexed: 11/23/2022] Open
Abstract
Osseointegration at the bone–implant interface is a complex biological process that is triggered by the immune-inflammatory response and mediated by various cell types such as, bone-forming cells and immune cells, especially macrophages. The polarization of macrophages to inflammatory/regenerative (M1/M2) phenotypes, as well as the osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) at the bone–implant interface, significantly affects implant osseointegration and even causes implant failure. Graphene oxide (GO) is a promising candidate for performing implant surface functionalization to modulate the interactions between implants and cells. Herein, we explored the effects of a GO coating on the osteogenic differentiation of BMSCs and the polarization of macrophages to enhance the application of GO surface modification in improving bone–implant integration. In the present study, a large particle sandblasting and acid etching (SLA) surface that is commonly used in clinical practice was selected as the control group, and GO was deposited on the SLA surface by the ultrasonic atomization spraying technique. The surface characteristics of these two groups, including the surface morphology, roughness, wettability, protein adsorption capacity and cell compatibility, were assessed. Then, the effects of GO surface modification on the osteogenic differentiation of BMSCs and the polarization of macrophages were evaluated. The results showed that the GO coating was successfully fabricated on the titanium substrates, which endowed the SLA surface with improved hydrophilicity and protein adsorption capacity and reduced roughness. Compared with the SLA surface, the GO-modified surface significantly enhanced the osteogenic differentiation of BMSCs and the M2-phenotype polarization of macrophages in vitro. This dual-regulatory role is of great significance in achieving rapid osseointegration as well as resolving the poor osseointegration associated with macrophage-related inflammation. Dual roles of graphene oxide modification for enhancing osteogenic differentiation of BMSCs and M2-phenotype polarization of macrophages.![]()
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Affiliation(s)
- Qingfan Li
- Shanghai Engineering Research Center of Tooth Restoration and Regeneration
- Department of Oral Implant
- School of Stomatology
- Tongji University
- Shanghai
| | - Anfeng Shen
- School of Materials Science and Engineering
- University of Shanghai for Science and Technology
- Shanghai
- China
| | - Zuolin Wang
- Shanghai Engineering Research Center of Tooth Restoration and Regeneration
- Department of Oral Implant
- School of Stomatology
- Tongji University
- Shanghai
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16
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Ghezzi B, Lagonegro P, Fukata N, Parisi L, Calestani D, Galli C, Salviati G, Macaluso GM, Rossi F. Sub-Micropillar Spacing Modulates the Spatial Arrangement of Mouse MC3T3-E1 Osteoblastic Cells. NANOMATERIALS 2019; 9:nano9121701. [PMID: 31795174 PMCID: PMC6955749 DOI: 10.3390/nano9121701] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 11/22/2019] [Accepted: 11/25/2019] [Indexed: 12/11/2022]
Abstract
Surface topography is one of the main factors controlling cell responses on implanted devices and a proper definition of the characteristics that optimize cell behavior may be crucial to improve the clinical performances of these implants. Substrate geometry is known to affect cell shape, as cells try to optimize their adhesion by adapting to the irregularities beneath, and this in turn profoundly affects their activity. In the present study, we cultured murine calvaria MC3T3-E1 cells on surfaces with pillars arranged as hexagons with two different spacings and observed their morphology during adhesion and growth. Cells on these highly ordered substrates attached and proliferated effectively, showing a marked preference for minimizing the inter-pillar distance, by following specific pathways across adjacent pillars and displaying consistent morphological modules. Moreover, cell behavior appeared to follow tightly controlled patterns of extracellular protein secretion, which preceded and matched cells and, on a sub-cellular level, cytoplasmic orientation. Taken together, these results outline the close integration of surface features, extracellular proteins alignment and cell arrangement, and provide clues on how to control and direct cell spatial order and cell morphology by simply acting on inter-pillar spacing.
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Affiliation(s)
- Benedetta Ghezzi
- Centro Universitario di Odontoiatria, Università di Parma, Via Gramsci 14, 43126 Parma, Italy; (L.P.); (G.M.M.)
- Dipartimento di Medicina e Chirurgia, Università di Parma, Via Gramsci 14, 43126 Parma, Italy;
- Correspondence:
| | - Paola Lagonegro
- ISMAC-CNR, Institute for macromolecular studies, Via Corti, 12, 20133 Milano, Italy;
- IMEM-CNR, Institute of Materials for Electronics and Magnetism, Parco Area delle Scienze, 37/A, 43124 Parma, Italy; (D.C.); (G.S.); (F.R.)
| | - Naoki Fukata
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan;
- Institute of Applied Physics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8573, Japan
| | - Ludovica Parisi
- Centro Universitario di Odontoiatria, Università di Parma, Via Gramsci 14, 43126 Parma, Italy; (L.P.); (G.M.M.)
- Dipartimento di Medicina e Chirurgia, Università di Parma, Via Gramsci 14, 43126 Parma, Italy;
- Labör für Orale Molekularbiologie, Klinik für Kieferorthopädie, Zahnmedizinische Klinik, Universität Bern, Freiburgstrasse 7, 3008 Bern, Switzerland
| | - Davide Calestani
- IMEM-CNR, Institute of Materials for Electronics and Magnetism, Parco Area delle Scienze, 37/A, 43124 Parma, Italy; (D.C.); (G.S.); (F.R.)
| | - Carlo Galli
- Dipartimento di Medicina e Chirurgia, Università di Parma, Via Gramsci 14, 43126 Parma, Italy;
| | - Giancarlo Salviati
- IMEM-CNR, Institute of Materials for Electronics and Magnetism, Parco Area delle Scienze, 37/A, 43124 Parma, Italy; (D.C.); (G.S.); (F.R.)
| | - Guido M. Macaluso
- Centro Universitario di Odontoiatria, Università di Parma, Via Gramsci 14, 43126 Parma, Italy; (L.P.); (G.M.M.)
- Dipartimento di Medicina e Chirurgia, Università di Parma, Via Gramsci 14, 43126 Parma, Italy;
- IMEM-CNR, Institute of Materials for Electronics and Magnetism, Parco Area delle Scienze, 37/A, 43124 Parma, Italy; (D.C.); (G.S.); (F.R.)
| | - Francesca Rossi
- IMEM-CNR, Institute of Materials for Electronics and Magnetism, Parco Area delle Scienze, 37/A, 43124 Parma, Italy; (D.C.); (G.S.); (F.R.)
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Platelet Adhesion on Commercially Pure Titanium Plates in Vitro II. Immunofluorescence Visualization of PDGF-B, TGFβ1, and PPARγ Released from Activated Adherent Platelets. Dent J (Basel) 2019; 7:dj7040109. [PMID: 31752355 PMCID: PMC6960926 DOI: 10.3390/dj7040109] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 11/14/2019] [Accepted: 11/14/2019] [Indexed: 12/11/2022] Open
Abstract
Recent progress in the industrial development of dental implants has improved their surface bio-affinity, while clinical implantologists attempt to improve it through coating with various compounds, including platelet-rich plasma (PRP) in clinical settings. However, it is poorly understood how PRP acts on titanium surfaces. To validate this surface modification method and demonstrate how platelet-derived soluble biomolecules released from the activated adherent platelets act on plain, commercially pure-titanium (cp-Ti) plates, we evaluated the distribution of biomolecules by immunofluorescence. PPARγ, PDGF-B, and TGFβ1 were similarly released at immunofluorescence levels from activated adherent platelets, retained in the surrounding extra-platelet spaces for a while, and did not immediately diffuse away to distant spaces. Exogenously added CaCl2 augmented release and retention of those biomolecules along with activation and aggregation. Taken together with our previous data regarding platelet adhesion, these findings suggest that especially when treated with CaCl2, platelets immediately adhere on cp-Ti plates to release their stored biomolecules in the absence of plasma proteins and that these biomolecules do not diffuse away, but stay longer in extra-platelet spaces around the platelets by newly formed, immature fibrin fiber fragments. Consequently, these retained biomolecules are anticipated to cooperatively stabilize implants by stimulating alveolar bone regeneration and integration.
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Marenzi G, Impero F, Scherillo F, Sammartino JC, Squillace A, Spagnuolo G. Effect of Different Surface Treatments on Titanium Dental Implant Micro-Morphology. MATERIALS 2019; 12:ma12050733. [PMID: 30836588 PMCID: PMC6427554 DOI: 10.3390/ma12050733] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 02/27/2019] [Accepted: 03/01/2019] [Indexed: 12/13/2022]
Abstract
Background: Titanium dental implants are today widely used with osseointegration mainly dependently on the implant surface properties. Different processing routes lead to different surface characteristics resulting, of course, in different in situ behaviors of the implants. Materials: The effect of different treatments, whether mechanical or chemical, on the surface morphology of titanium implants were investigated. To this aim, various experimental methods, including roughness analysis as well scanning electron microscope (SEM) observations, were applied. Results: The results showed that, in contrast to the mechanical treatments, the chemical ones gave rise to a more irregular surface. SEM observations suggested that where commercial pure titanium was used, the chemical treatments provided implant surfaces without contaminations. In contrast, sandblasted implants could cause potential risks of surface contamination because of the presence of blasting particles remnants. Conclusions: The examined implant surfaces showed different roughness levels in relation to the superficial treatment applied. The acid-etched surfaces were characterized by the presence of deeper valleys and higher peaks than the sandblasted surfaces. For this reason, acid-etched surfaces can be more easily damaged by the stress produced by the peri-implant bone during surgical implant placement.
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Affiliation(s)
- Gaetano Marenzi
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, University of Naples "Federico II", Via Pansini 5, 80131 Naples, Italy.
| | - Filomena Impero
- Department of Chemical, Materials and Industrial Production Engineering, University of Naples "Federico II", P.le Tecchio 80, 80125 Napoli, Italy.
| | - Fabio Scherillo
- Department of Chemical, Materials and Industrial Production Engineering, University of Naples "Federico II", P.le Tecchio 80, 80125 Napoli, Italy.
| | - Josè Camilla Sammartino
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Via Ferrata 1, 27100 Pavia, Italy.
| | - Antonino Squillace
- Department of Chemical, Materials and Industrial Production Engineering, University of Naples "Federico II", P.le Tecchio 80, 80125 Napoli, Italy.
| | - Gianrico Spagnuolo
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, University of Naples "Federico II", Via Pansini 5, 80131 Naples, Italy.
- Institute of Dentistry, I. M. Sechenov First Moscow State Medical University, 119146 Moscow, Russia.
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19
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Yue G, Song W, Xu S, Sun Y, Wang Z. Role of ILK/p38 pathway in mediating the enhanced osteogenic differentiation of bone marrow mesenchymal stem cells on amorphous carbon coating. Biomater Sci 2019; 7:975-984. [DOI: 10.1039/c8bm01151f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Amorphous carbon (a-C) film is a promising candidate for metallic implant surface coatings to improve corrosion resistance and osteogenesis in vivo.
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Affiliation(s)
- Guangna Yue
- Department of Oral Implantology
- School of Stomatology & Shanghai Engineering Research Center of Tooth Restoration and Regeneration
- Tongji University
- Shanghai 200072
- China
| | - Wen Song
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology
- Department of Prosthodontics
- School of Stomatology
- The Fourth Military Medical University
- Xi'an 710032
| | - Shuyu Xu
- Department of Oral Implantology
- School of Stomatology & Shanghai Engineering Research Center of Tooth Restoration and Regeneration
- Tongji University
- Shanghai 200072
- China
| | - Yao Sun
- Department of Oral Implantology
- School of Stomatology & Shanghai Engineering Research Center of Tooth Restoration and Regeneration
- Tongji University
- Shanghai 200072
- China
| | - Zuolin Wang
- Department of Oral Implantology
- School of Stomatology & Shanghai Engineering Research Center of Tooth Restoration and Regeneration
- Tongji University
- Shanghai 200072
- China
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20
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Tavakoli J, Khosroshahi ME. Surface morphology characterization of laser-induced titanium implants: lesson to enhance osseointegration process. Biomed Eng Lett 2018; 8:249-257. [PMID: 30603208 DOI: 10.1007/s13534-018-0063-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 03/05/2018] [Accepted: 03/18/2018] [Indexed: 12/27/2022] Open
Abstract
The surface properties of implant are responsible to provide mechanical stability by creating an intimate bond between the bone and implant; hence, play a major role on osseointegration process. The current study was aimed to measure surface characteristics of titanium modified by a pulsed Nd:YAG laser. The results of this study revealed an optimum density of laser energy (140 Jcm-2), at which improvement of osteointegration process was seen. Significant differences were found between arithmetical mean height (Ra), root mean square deviation (Rq) and texture orientation, all were lower for 140 Jcm-2 samples compared to untreated one. Also it was identified that the surface segments were more uniformly distributed with a more Gaussian distribution for treated samples at 140 Jcm-2. The distribution of texture orientation at high laser density (250 and 300 Jcm-2) were approximately similar to untreated sample. The skewness index that indicates how peaks and valleys are distributed throughout the surface showed a positive value for laser treated samples, compared to untreated one. The surface characterization revealed that Kurtosis index, which tells us how high or flat the surface profile is, for treated sample at 140 Jcm-2 was marginally close to 3 indicating flat peaks and valleys in the surface profile.
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Affiliation(s)
- Javad Tavakoli
- 1Biomechanics and Implants Research Group, The Medical Device Research Institute, College of Science and Engineering, Flinders University, GPO Box 2100, Adelaide, SA 5001 Australia
| | - Mohammad E Khosroshahi
- 2Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8 Canada
- MIS-Electronics, Nanobiophotonics and Biomedical Research Lab, Richmond Hill, ON L4B 1B4 Canada
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