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Matsuura T, Komatsu K, Cheng J, Park G, Ogawa T. Beyond microroughness: novel approaches to navigate osteoblast activity on implant surfaces. Int J Implant Dent 2024; 10:35. [PMID: 38967690 PMCID: PMC11226592 DOI: 10.1186/s40729-024-00554-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Accepted: 06/15/2024] [Indexed: 07/06/2024] Open
Abstract
Considering the biological activity of osteoblasts is crucial when devising new approaches to enhance the osseointegration of implant surfaces, as their behavior profoundly influences clinical outcomes. An established inverse correlation exists between osteoblast proliferation and their functional differentiation, which constrains the rapid generation of a significant amount of bone. Examining the surface morphology of implants reveals that roughened titanium surfaces facilitate rapid but thin bone formation, whereas smooth, machined surfaces promote greater volumes of bone formation albeit at a slower pace. Consequently, osteoblasts differentiate faster on roughened surfaces but at the expense of proliferation speed. Moreover, the attachment and initial spreading behavior of osteoblasts are notably compromised on microrough surfaces. This review delves into our current understanding and recent advances in nanonodular texturing, meso-scale texturing, and UV photofunctionalization as potential strategies to address the "biological dilemma" of osteoblast kinetics, aiming to improve the quality and quantity of osseointegration. We discuss how these topographical and physicochemical strategies effectively mitigate and even overcome the dichotomy of osteoblast behavior and the biological challenges posed by microrough surfaces. Indeed, surfaces modified with these strategies exhibit enhanced recruitment, attachment, spread, and proliferation of osteoblasts compared to smooth surfaces, while maintaining or amplifying the inherent advantage of cell differentiation. These technology platforms suggest promising avenues for the development of future implants.
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Affiliation(s)
- Takanori Matsuura
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, 10833 Le Conte Avenue B3-087, Box951668, Los Angeles, CA, 90095-1668, USA
| | - Keiji Komatsu
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, 10833 Le Conte Avenue B3-087, Box951668, Los Angeles, CA, 90095-1668, USA
| | - James Cheng
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, 10833 Le Conte Avenue B3-087, Box951668, Los Angeles, CA, 90095-1668, USA
- Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, Los Angeles, USA
| | - Gunwoo Park
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, 10833 Le Conte Avenue B3-087, Box951668, Los Angeles, CA, 90095-1668, USA
| | - Takahiro Ogawa
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, 10833 Le Conte Avenue B3-087, Box951668, Los Angeles, CA, 90095-1668, USA.
- Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, Los Angeles, USA.
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Komatsu K, Matsuura T, Cheng J, Kido D, Park W, Ogawa T. Nanofeatured surfaces in dental implants: contemporary insights and impending challenges. Int J Implant Dent 2024; 10:34. [PMID: 38963524 PMCID: PMC11224214 DOI: 10.1186/s40729-024-00550-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Accepted: 05/27/2024] [Indexed: 07/05/2024] Open
Abstract
Dental implant therapy, established as standard-of-care nearly three decades ago with the advent of microrough titanium surfaces, revolutionized clinical outcomes through enhanced osseointegration. However, despite this pivotal advancement, challenges persist, including prolonged healing times, restricted clinical indications, plateauing success rates, and a notable incidence of peri-implantitis. This review explores the biological merits and constraints of microrough surfaces and evaluates the current landscape of nanofeatured dental implant surfaces, aiming to illuminate strategies for addressing existing impediments in implant therapy. Currently available nanofeatured dental implants incorporated nano-structures onto their predecessor microrough surfaces. While nanofeature integration into microrough surfaces demonstrates potential for enhancing early-stage osseointegration, it falls short of surpassing its predecessors in terms of osseointegration capacity. This discrepancy may be attributed, in part, to the inherent "dichotomy kinetics" of osteoblasts, wherein increased surface roughness by nanofeatures enhances osteoblast differentiation but concomitantly impedes cell attachment and proliferation. We also showcase a controllable, hybrid micro-nano titanium model surface and contrast it with commercially-available nanofeatured surfaces. Unlike the commercial nanofeatured surfaces, the controllable micro-nano hybrid surface exhibits superior potential for enhancing both cell differentiation and proliferation. Hence, present nanofeatured dental implants represent an evolutionary step from conventional microrough implants, yet they presently lack transformative capacity to surmount existing limitations. Further research and development endeavors are imperative to devise optimized surfaces rooted in fundamental science, thereby propelling technological progress in the field.
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Affiliation(s)
- Keiji Komatsu
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, USA
| | - Takanori Matsuura
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, USA
| | - James Cheng
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, USA
- Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, Los Angeles, USA
- Section of Periodontics, UCLA School of Dentistry, Los Angeles, USA
| | - Daisuke Kido
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, USA
| | - Wonhee Park
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, USA
- Department of Dentistry, College of Medicine, Hanyang University, Seoul, Korea
| | - Takahiro Ogawa
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, USA.
- Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, Los Angeles, USA.
- Weintraub Center for Reconstructive Biotechnology, Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, 10833 Le Conte Avenue B3-087, Box951668, Los Angeles, CA, 90095-1668, USA.
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Cao Y, Wang H, Cao S, Liu Z, Zhang Y. Preparation and Characterization of Nanofiber Coatings on Bone Implants for Localized Antimicrobial Activity Based on Sustained Ion Release and Shape-Preserving Design. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2584. [PMID: 38893848 PMCID: PMC11173675 DOI: 10.3390/ma17112584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2024] [Revised: 05/19/2024] [Accepted: 05/23/2024] [Indexed: 06/21/2024]
Abstract
Titanium (Ti), as a hard tissue implant, is facing a big challenge for rapid and stable osseointegration owing to its intrinsic bio-inertness. Meanwile, surface-related infection is also a serious threat. In this study, large-scale quasi-vertically aligned sodium titanate nanowire (SNW) arrayed coatings incorporated with bioactive Cu2+ ions were fabricated through a compound process involving acid etching, hydrothermal treatment (HT), and ion exchange (IE). A novel coating based on sustained ion release and a shape-preserving design is successfully obtained. Cu2+ substituted Na+ in sodium titanate lattice to generate Cu-doped SNW (CNW), which maintains the micro-structure and phase components of the original SNW, and can be efficiently released from the structure by immersing them in physiological saline (PS) solutions, ensuring superior long-term structural stability. The synergistic effects of the acid etching, bidirectional cogrowth, and solution-strengthening mechanisms endow the coating with higher bonding strengths. In vitro antibacterial tests demonstrated that the CNW coatings exhibited effective good antibacterial properties against both Gram-positive and Gram-negative bacteria based on the continuous slow release of copper ions. This is an exciting attempt to achieve topographic, hydrophilic, and antibacterial activation of metal implants, demonstrating a paradigm for the activation of coatings without dissolution and providing new insights into insoluble ceramic-coated implants with high bonding strengths.
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Affiliation(s)
- Yubao Cao
- School of Machinery and Automation, Weifang University, Weifang 261061, China
| | - Hong Wang
- School of Machinery and Automation, Weifang University, Weifang 261061, China
| | - Shuyun Cao
- School of Machinery and Automation, Weifang University, Weifang 261061, China
| | - Zaihao Liu
- College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Yanni Zhang
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi’an 710072, China
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Kitajima H, Hirota M, Osawa K, Iwai T, Mitsudo K, Saruta J, Ogawa T. The Effects of a Biomimetic Hybrid Meso- and Nano-Scale Surface Topography on Blood and Protein Recruitment in a Computational Fluid Dynamics Implant Model. Biomimetics (Basel) 2023; 8:376. [PMID: 37622981 PMCID: PMC10452410 DOI: 10.3390/biomimetics8040376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 08/04/2023] [Accepted: 08/11/2023] [Indexed: 08/26/2023] Open
Abstract
The mechanisms underlying bone-implant integration, or osseointegration, are still incompletely understood, in particular how blood and proteins are recruited to implant surfaces. The objective of this study was to visualize and quantify the flow of blood and the model protein fibrinogen using a computational fluid dynamics (CFD) implant model. Implants with screws were designed with three different surface topographies: (1) amorphous, (2) nano-trabecular, and (3) hybrid meso-spikes and nano-trabeculae. The implant with nano-topography recruited more blood and fibrinogen to the implant interface than the amorphous implant. Implants with hybrid topography further increased recruitment, with particularly efficient recruitment from the thread area to the interface. Blood movement significantly slowed at the implant interface compared with the thread area for all implants. The blood velocity at the interface was 3- and 4-fold lower for the hybrid topography compared with the nano-topography and amorphous surfaces, respectively. Thus, this study for the first time provides insights into how different implant surfaces regulate blood dynamics and the potential advantages of surface texturization in blood and protein recruitment and retention. In particular, co-texturization with a hybrid meso- and nano-topography created the most favorable microenvironment. The established CFD model is simple, low-cost, and expected to be useful for a wide range of studies designing and optimizing implants at the macro and micro levels.
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Affiliation(s)
- Hiroaki Kitajima
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA (M.H.); (J.S.)
- Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan; (K.O.); (T.I.); (K.M.)
| | - Makoto Hirota
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA (M.H.); (J.S.)
- Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA
- Department of Oral and Maxillofacial Surgery/Orthodontics, Yokohama City University Medical Center, 4-57 Urafune-cho, Minami-ku, Yokohama 232-0024, Japan
| | - Kohei Osawa
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan; (K.O.); (T.I.); (K.M.)
| | - Toshinori Iwai
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan; (K.O.); (T.I.); (K.M.)
| | - Kenji Mitsudo
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan; (K.O.); (T.I.); (K.M.)
| | - Juri Saruta
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA (M.H.); (J.S.)
- Department of Education Planning, School of Dentistry, Kanagawa Dental University, 82 Inaoka, Yokosuka 238-8580, Japan
| | - Takahiro Ogawa
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA (M.H.); (J.S.)
- Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA
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A Novel High-Energy Vacuum Ultraviolet Light Photofunctionalization Approach for Decomposing Organic Molecules around Titanium. Int J Mol Sci 2023; 24:ijms24031978. [PMID: 36768297 PMCID: PMC9916712 DOI: 10.3390/ijms24031978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 01/01/2023] [Accepted: 01/11/2023] [Indexed: 01/20/2023] Open
Abstract
Titanium undergoes biological aging, represented by increased hydrophobicity and surface accumulation of organic molecules over time, which compromises the osseointegration of dental and orthopedic implants. Here, we evaluated the efficacy of a novel UV light source, 172 nm wavelength vacuum UV (VUV), in decomposing organic molecules around titanium. Methylene blue solution used as a model organic molecule placed in a quartz ampoule with and without titanium specimens was treated with four different UV light sources: (i) ultraviolet C (UVC), (ii) high-energy UVC (HUVC), (iii) proprietary UV (PUV), and (iv) VUV. After one minute of treatment, VUV decomposed over 90% of methylene blue, while there was 3-, 3-, and 8-fold more methylene blue after the HUVC, PUV, and UVC treatments, respectively. In dose-dependency experiments, maximal methylene blue decomposition occurred after one minute of VUV treatment and after 20-30 min of UVC treatment. Rapid and effective VUV-mediated organic decomposition was not influenced by the surface topography of titanium or its alloy and even occurred in the absence of titanium, indicating only a minimal photocatalytic contribution of titanium dioxide to organic decomposition. VUV-mediated but not other light source-mediated methylene blue decomposition was proportional to its concentration. Plastic tubes significantly reduced methylene blue decomposition for all light sources. These results suggest that VUV, in synergy with quartz ampoules, mediates rapid and effective organic decomposition compared with other UV sources. This proof-of-concept study paves the way for rapid and effective VUV-powered photofunctionalization of titanium to overcome biological aging.
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Kitajima H, Hirota M, Komatsu K, Isono H, Matsuura T, Mitsudo K, Ogawa T. Ultraviolet Light Treatment of Titanium Microfiber Scaffolds Enhances Osteoblast Recruitment and Osteoconductivity in a Vertical Bone Augmentation Model: 3D UV Photofunctionalization. Cells 2022; 12:cells12010019. [PMID: 36611812 PMCID: PMC9818481 DOI: 10.3390/cells12010019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 12/16/2022] [Accepted: 12/17/2022] [Indexed: 12/24/2022] Open
Abstract
Vertical bone augmentation to create host bone prior to implant placement is one of the most challenging regenerative procedures. The objective of this study is to evaluate the capacity of a UV-photofunctionalized titanium microfiber scaffold to recruit osteoblasts, generate intra-scaffold bone, and integrate with host bone in a vertical augmentation model with unidirectional, limited blood supply. Scaffolds were fabricated by molding and sintering grade 1 commercially pure titanium microfibers (20 μm diameter) and treated with UVC light (200-280 nm wavelength) emitted from a low-pressure mercury lamp for 20 min immediately before experiments. The scaffolds had an even and dense fiber network with 87% porosity and 20-50 mm inter-fiber distance. Surface carbon reduced from 30% on untreated scaffold to 10% after UV treatment, which corresponded to hydro-repellent to superhydrophilic conversion. Vertical infiltration testing revealed that UV-treated scaffolds absorbed 4-, 14-, and 15-times more blood, water, and glycerol than untreated scaffolds, respectively. In vitro, four-times more osteoblasts attached to UV-treated scaffolds than untreated scaffolds three hours after seeding. On day 2, there were 70% more osteoblasts on UV-treated scaffolds. Fluorescent microscopy visualized confluent osteoblasts on UV-treated microfibers two days after seeding but sparse and separated cells on untreated microfibers. Alkaline phosphatase activity and osteocalcin gene expression were significantly greater in osteoblasts grown on UV-treated microfiber scaffolds. In an in vivo model of vertical augmentation on rat femoral cortical bone, the interfacial strength between innate cortical bone and UV-treated microfiber scaffold after two weeks of healing was double that observed between bone and untreated scaffold. Morphological and chemical analysis confirmed seamless integration of the innate cortical and regenerated bone within microfiber networks for UV-treated scaffolds. These results indicate synergy between titanium microfiber scaffolds and UV photofunctionalization to provide a novel and effective strategy for vertical bone augmentation.
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Affiliation(s)
- Hiroaki Kitajima
- Division of Regenerative and Reconstructive Sciences and Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA
- Department of Oral and Maxillofacial Surgery, Yokohama City University Graduate School of Medicine, 3-9 Fuku-ura, Kanazawa-ku, Yokohama 236-0004, Kanagawa, Japan
| | - Makoto Hirota
- Division of Regenerative and Reconstructive Sciences and Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA
- Department of Oral and Maxillofacial Surgery/Orthodontics, Yokohama City University Medical Center, 4-57 Urafune-cho, Minami-ku, Yokohama 236-0004, Kanagawa, Japan
- Correspondence: ; Tel./Fax: +81-45-785-8438
| | - Keiji Komatsu
- Division of Regenerative and Reconstructive Sciences and Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA
| | - Hitoshi Isono
- Department of Oral and Maxillofacial Surgery, Yokohama City University Graduate School of Medicine, 3-9 Fuku-ura, Kanazawa-ku, Yokohama 236-0004, Kanagawa, Japan
| | - Takanori Matsuura
- Division of Regenerative and Reconstructive Sciences and Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA
| | - Kenji Mitsudo
- Department of Oral and Maxillofacial Surgery, Yokohama City University Graduate School of Medicine, 3-9 Fuku-ura, Kanazawa-ku, Yokohama 236-0004, Kanagawa, Japan
| | - Takahiro Ogawa
- Division of Regenerative and Reconstructive Sciences and Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA
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Kumar A, Sijina K, Rajanikant G, Kuriachen B. Experimental Investigation into the effects of Electric Discharge Surface Modification Process Parameters on the Biocompatibility of Ti6Al4V. BIOMEDICAL ENGINEERING ADVANCES 2022. [DOI: 10.1016/j.bea.2022.100063] [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] Open
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Kitajima H, Komatsu K, Matsuura T, Ozawa R, Saruta J, Taleghani SR, Cheng J, Ogawa T. Impact of nano-scale trabecula size on osteoblastic behavior and function in a meso-nano hybrid rough biomimetic zirconia model. J Prosthodont Res 2022; 67:288-299. [PMID: 35858802 DOI: 10.2186/jpr.jpr_d_22_00015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE A novel implant model consisting of meso-scale cactus-inspired spikes and nano-scale bone-inspired trabeculae was recently developed to optimize meso-scale roughness on zirconia. In this model, the meso-spike dimension had a significant impact on osteoblast function. To explore how different nano-textures impact this model, here we examined the effect of different nano-trabecula sizes on osteoblast function while maintaining the same meso-spike conformation. METHODS Zirconia disks with meso-nano hybrid surfaces were created by laser etching. The meso-spikes were fixed to 40 μm high, whereas the nano-texture was etched as large and small trabeculae of average Feret diameter 237.0 and 134.1 nm, respectively. A polished surface was also prepared. Rat bone marrow-derived and human mesenchymal stromal cell-induced osteoblasts were cultured on these disks. RESULTS Hybrid rough surfaces, regardless of nano-trabecula dimension, robustly promoted the osteoblastic differentiation of both rat and human osteoblasts compared to those on polished surfaces. Hybrid surfaces with small nano-trabeculae further enhanced osteoblastic differentiation compared with large nano-trabeculae. However, the difference in osteoblastic differentiation between small and large nano-trabeculae was much smaller than the difference between the polished and hybrid rough surfaces. The nano-trabecula size did not influence osteoblast attachment and proliferation, or protein adsorption. Both hybrid surfaces were hydro-repellent. The atomic percentage of surface carbon was lower on the hybrid surface with small nano-trabeculae. CONCLUSIONS Small nano-trabeculae promoted osteoblastic differentiation more than large nano-trabeculae when combined with meso-scale spikes. However, the biological impact of different nano-trabeculae was relatively small compared with that of different dimensions of meso-spikes.
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Affiliation(s)
- Hiroaki Kitajima
- Weintraub Center for Reconstructive Biotechnology and the Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668
| | - Keiji Komatsu
- Weintraub Center for Reconstructive Biotechnology and the Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668
| | - Takanori Matsuura
- Weintraub Center for Reconstructive Biotechnology and the Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668
| | - Ryotaro Ozawa
- Weintraub Center for Reconstructive Biotechnology and the Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668
| | - Juri Saruta
- Weintraub Center for Reconstructive Biotechnology and the Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668
| | - Samira Rahim Taleghani
- Weintraub Center for Reconstructive Biotechnology and the Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668
| | - James Cheng
- Weintraub Center for Reconstructive Biotechnology and the Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668
| | - Takahiro Ogawa
- Weintraub Center for Reconstructive Biotechnology and the Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668
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Zhang Y, Wang X, Li Y, Liang J, Jiang P, Huang Q, Yang Y, Duan H, Dong X, Rui G, Lin C. Cell osteogenic bioactivity mediated precisely by varying scaled micro-pits on ordered micro/nano hierarchical structures of titanium. Regen Biomater 2022; 9:rbac046. [PMID: 35855110 PMCID: PMC9290875 DOI: 10.1093/rb/rbac046] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 06/12/2022] [Accepted: 06/19/2022] [Indexed: 11/30/2022] Open
Abstract
Hierarchical surface structures with micro–nano scale play a crucial role in regulation of cell proliferation and osteogenic differentiation. It has been proven that cells are extremely sensitive to the nanoscaled structure and show multifarious phenotypes. Though a vital function of microstructure on osseointegration has been confirmed, the cell performances response to different microscaled structure is needed to be further dissected and in depth understood. In this work, the ordered micro–nano hierarchical structures with varying micro-scaled pits were precisely fabricated on titanium successfully by the combination of electrochemical, chemical etching and anodization as well. In vitro systematical assessments indicated that the micro–nano multilevel structures on titanium exhibited excellent cells adhesion and spreading ability, as well as steerable proliferation and osteogenic differentiation behaviors. It is shown that smaller micro-pits and lower roughness of the hierarchical structures enabled faster cell propagation. Despite cell growth was delayed on micro–nano titanium with relatively larger cell-match-size micro-pits and roughness, osteogenic-specific genes were significantly elevated. Furthermore, the alkaline phosphatase activity, collagen secretion and extracellular matrix mineralization of MC3T3-E1 on multi-scaled titanium were suppressed by a large margin after adding IWP-2 (an inhibitor of Wnt/β-catenin signal pathway), indicating this pathway played a crucial part in cell osteogenic differentiation modulated by micro–nano structures.
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Affiliation(s)
- Yanmei Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, and College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
| | - Xiankuan Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, and College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
| | - Yaxian Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces, and College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
| | - Jianhe Liang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, and College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
| | - Pinliang Jiang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, and College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
| | - Qiaoling Huang
- Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, College of Physical Science and Technology, Xiamen University , Xiamen 361005, China
| | - Yun Yang
- Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, College of Physical Science and Technology, Xiamen University , Xiamen 361005, China
| | - Hongping Duan
- Beijing Engineering Laboratory of Functional Medical Materials and Devices, Beijing Medical Implant Engineering Research Center, Beijing Naton Technology Group Co. Ltd , Beijing, China
| | - Xiang Dong
- Beijing Engineering Laboratory of Functional Medical Materials and Devices, Beijing Medical Implant Engineering Research Center, Beijing Naton Technology Group Co. Ltd , Beijing, China
| | - Gang Rui
- The First Affiliated Hospital of Xiamen University Department of Orthopedics Surgery, , Xiamen, Fujian 361003, China
| | - Changjian Lin
- and College of Chemistry and Chemical Engineering, Xiamen University State Key Laboratory of Physical Chemistry of Solid Surfaces, , Xiamen 361005, China
- Tan Kah Kee Innovation Laboratory, Xiamen , Fujian, 361005 China
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10
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Ultraviolet Treatment of Titanium to Enhance Adhesion and Retention of Oral Mucosa Connective Tissue and Fibroblasts. Int J Mol Sci 2021; 22:ijms222212396. [PMID: 34830275 PMCID: PMC8617952 DOI: 10.3390/ijms222212396] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 11/13/2021] [Accepted: 11/15/2021] [Indexed: 01/16/2023] Open
Abstract
Peri-implantitis is an unsolved but critical problem with dental implants. It is postulated that creating a seal of gingival soft tissue around the implant neck is key to preventing peri-implantitis. The objective of this study was to determine the effect of UV surface treatment of titanium disks on the adhesion strength and retention time of oral connective tissues as well as on the adherence of mucosal fibroblasts. Titanium disks with a smooth machined surface were prepared and treated with UV light for 15 min. Keratinized mucosal tissue sections (3 × 3 mm) from rat palates were incubated for 24 h on the titanium disks. The adhered tissue sections were then mechanically detached by agitating the culture dishes. The tissue sections remained adherent for significantly longer (15.5 h) on the UV-treated disks than on the untreated control disks (7.5 h). A total of 94% of the tissue sections were adherent for 5 h or longer on the UV-treated disks, whereas only 50% of the sections remained on the control disks for 5 h. The adhesion strength of the tissue sections to the titanium disks, as measured by tensile testing, was six times greater after UV treatment. In the culture studies, mucosal fibroblasts extracted from rat palates were attached to titanium disks by incubating for 24, 48, or 96 h. The number of attached cells was consistently 15–30% greater on the UV-treated disks than on the control disks. The cells were then subjected to mechanical or chemical (trypsinization) detachment. After mechanical detachment, the residual cell rates on the UV-treated surfaces after 24 and 48 h of incubation were 35% and 25% higher, respectively, than those on the control surfaces. The remaining rate after chemical detachment was 74% on the control surface and 88% on the UV-treated surface for the cells cultured for 48 h. These trends were also confirmed in mouse embryonic fibroblasts, with an intense expression of vinculin, a focal adhesion protein, on the UV-treated disks even after detachment. The UV-treated titanium was superhydrophilic, whereas the control titanium was hydrophobic. X-ray photoelectron spectroscopy (XPS) chemical analysis revealed that the amount of carbon at the surface was significantly reduced after UV treatment, while the amount of TiOH molecules was increased. These ex vivo and in vitro results indicate that the UV treatment of titanium increases the adhesion and retention of oral mucosa connective tissue as a result of increased resistance of constituent fibroblasts against exogenous detachment, both mechanically and chemically, as well as UV-induced physicochemical changes of the titanium surface.
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11
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Biomimetic Zirconia with Cactus-Inspired Meso-Scale Spikes and Nano-Trabeculae for Enhanced Bone Integration. Int J Mol Sci 2021; 22:ijms22157969. [PMID: 34360734 PMCID: PMC8347469 DOI: 10.3390/ijms22157969] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 07/20/2021] [Accepted: 07/21/2021] [Indexed: 01/03/2023] Open
Abstract
Biomimetic design provides novel opportunities for enhancing and functionalizing biomaterials. Here we created a zirconia surface with cactus-inspired meso-scale spikes and bone-inspired nano-scale trabecular architecture and examined its biological activity in bone generation and integration. Crisscrossing laser etching successfully engraved 60 μm wide, cactus-inspired spikes on yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) with 200–300 nm trabecular bone-inspired interwoven structures on the entire surface. The height of the spikes was varied from 20 to 80 μm for optimization. Average roughness (Sa) increased from 0.10 μm (polished smooth surface) to 18.14 μm (80 μm-high spikes), while the surface area increased by up to 4.43 times. The measured dimensions of the spikes almost perfectly correlated with their estimated dimensions (R2 = 0.998). The dimensional error of forming the architecture was 1% as a coefficient of variation. Bone marrow-derived osteoblasts were cultured on a polished surface and on meso- and nano-scale hybrid textured surfaces with different spike heights. The osteoblastic differentiation was significantly promoted on the hybrid-textured surfaces compared with the polished surface, and among them the hybrid-textured surface with 40 μm-high spikes showed unparalleled performance. In vivo bone-implant integration also peaked when the hybrid-textured surface had 40 μm-high spikes. The relationships between the spike height and measures of osteoblast differentiation and the strength of bone and implant integration were non-linear. The controllable creation of meso- and nano-scale hybrid biomimetic surfaces established in this study may provide a novel technological platform and design strategy for future development of biomaterial surfaces to improve bone integration and regeneration.
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12
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Chen L, Ren J, Hu N, Du Q, Wei D. Rapid structural regulation, apatite-inducing mechanism and in vivo investigation of microwave-assisted hydrothermally treated titania coating. RSC Adv 2021; 11:7305-7317. [PMID: 35423257 PMCID: PMC8695042 DOI: 10.1039/d0ra08511a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 01/25/2021] [Indexed: 11/21/2022] Open
Abstract
Owing to the poor bioactivity of microarc oxidation (MAO) coating and the rapid activation ability of the microwave hydrothermal (MH) technique, MH treatment was applied to optimize the in vivo interface status between MAO-treated titanium and bone. In this study, consequently, new outermost layers were prepared using hydroxyapatite (HA) nanorods, HA submicron pillars or sodium titanate nanosheets. The results revealed that the NaOH concentration significantly influenced the surface structure and phase constitution of the MAO samples. Moreover, on enhancing the NaOH concentration, the number of HA phases was decreased. Further, the influence of the NaOH concentration on the interfacial bonding strength was insignificant for concentrations ≤0.5 mol L−1. Transmission electron microscopy (TEM) analysis showed that the induction of apatite was accompanied by the dissolution of the HA crystals and there was excellent crystallographic matching with the HA crystals. The in vitro and in vivo analyses revealed that the MH-treated MAO sample with the HA nanorods possessed superior apatite-formation ability and osseointegration, including a small amount of soft tissue and optimal bone–implant interfacial bonding force, thus signifying strong potential for the optimization of the bone–implant interfacial status. In this work, the micro/nano scale structures of HA nanorods integrated on a titanium were prepared using MAO and MH treatment. The in vivo results indicate that HA crystals play a crucial role in the improvement of the osseointegration.![]()
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Affiliation(s)
- Lin Chen
- Orthopedics, Second Affiliated Hospital of Harbin Medical University Harbin 150086 China
| | - Junyu Ren
- Oral Implant Center, Second Affiliated Hospital of Harbin Medical University No. 246 Xuefu Road, Nangang District Harbin 150086 China
| | - Narisu Hu
- Oral Implant Center, Second Affiliated Hospital of Harbin Medical University No. 246 Xuefu Road, Nangang District Harbin 150086 China
| | - Qing Du
- Center of Analysis and Measurement, Harbin Institute of Technology Science Park, No. 2 Yikuang Street Harbin 150001 China .,Institute for Advanced Ceramics, Department of Materials Science and Engineering, Harbin Institute of Technology Harbin 150001 China.,Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology Harbin 150001 China
| | - Daqing Wei
- Center of Analysis and Measurement, Harbin Institute of Technology Science Park, No. 2 Yikuang Street Harbin 150001 China .,Institute for Advanced Ceramics, Department of Materials Science and Engineering, Harbin Institute of Technology Harbin 150001 China.,Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology Harbin 150001 China
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13
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Abstract
Surface modification is used to extend the life of implants. To increase the corrosion resistance and improve the biocompatibility of metal implant materials, oxidation of the Ti-13Nb-13Zr titanium alloy was used. The samples used for the research had the shape of a helix with a metric thread, with their geometry imitating a dental implant. The oxide layer was produced by a standard electrochemical method in an environment of 1M H3PO4 + 0.3% HF for 20 min, at a constant voltage of 30 V. The oxidized samples were analyzed with a scanning electron microscope. Nanotubular oxide layers with internal diameters of 30–80 nm were found. An analysis of the surface topography was performed using an optical microscope, and the Sa parameter was determined for the top of the helix and for the bottom, where a significant difference in value was observed. The presence of the modification layer, visible at the bottom of the helix, was confirmed by analyzing the sample cross-sections using computed tomography. Corrosion tests performed in the artificial saliva solution demonstrated higher corrosion current and less noble corrosion potential due to incomplete surface coverage and pitting. Necessary improved oxidation parameters will be applied in future work.
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14
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Jiang X, Yao Y, Tang W, Han D, Zhang L, Zhao K, Wang S, Meng Y. Design of dental implants at materials level: An overview. J Biomed Mater Res A 2020; 108:1634-1661. [PMID: 32196913 DOI: 10.1002/jbm.a.36931] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 03/06/2020] [Accepted: 03/09/2020] [Indexed: 12/17/2022]
Abstract
Due to the excellent restoration of masticatory function, satisfaction on aesthetics and other superiorities, dental implants represent an effective method to resolve tooth losing and damaging. Current dental implant systems still have problems waiting to be addressed, and problems are centralized on the materials of implant bodies. This review aims to summarize major developments in the field of dental implant materials, starting with an overview on structures, procedures of dental implants and challenges of implant materials. Next, implant materials are examined in three categories, that is, metals, ceramics, and polymers, their mechanical properties, biocompatibility, and bioactivity are summarized. And as an important aspect, strategies of surface modification are also reviewed, along with some finite element analysis to guiding the research direction of implant materials. Finally, the conclusive remarks are outlined to provide an outlook on the future research directions and prospects of dental implants.
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Affiliation(s)
- Xunyuan Jiang
- The Key Laboratory of Low-Carbon Chemistry and Energy Conservation of Guangdong Province, State Key Laboratory of Optoelectronic Materials Technologies, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Yitong Yao
- Department of Prosthodontics, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Weiming Tang
- The Key Laboratory of Low-Carbon Chemistry and Energy Conservation of Guangdong Province, State Key Laboratory of Optoelectronic Materials Technologies, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Dongmei Han
- The Key Laboratory of Low-Carbon Chemistry and Energy Conservation of Guangdong Province, State Key Laboratory of Optoelectronic Materials Technologies, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Li Zhang
- Analytical and Testing Center, Sichuan University, Chengdu, Sichuan, People's Republic of China
| | - Ke Zhao
- Department of Prosthodontics, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Shuanjin Wang
- The Key Laboratory of Low-Carbon Chemistry and Energy Conservation of Guangdong Province, State Key Laboratory of Optoelectronic Materials Technologies, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Yuezhong Meng
- The Key Laboratory of Low-Carbon Chemistry and Energy Conservation of Guangdong Province, State Key Laboratory of Optoelectronic Materials Technologies, Sun Yat-Sen University, Guangzhou, People's Republic of China
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15
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Liu X, Du G, Li M. True Photoreactivity Origin of Ti 3+-Doped Anatase TiO 2 Crystals with Respectively Dominated Exposed {001}, {101}, and {100} Facets. ACS OMEGA 2019; 4:14902-14912. [PMID: 31552330 PMCID: PMC6751725 DOI: 10.1021/acsomega.9b01648] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 08/12/2019] [Indexed: 06/05/2023]
Abstract
Combining the advantages of reactive crystal facets and engineering defects is an encouraging way to address the inherent disadvantages of titanium dioxide (TiO2) nanocrystals. However, revealing the true photoreactivity origin for defective TiO2 with coexposed or predominant exposed anisotropic facets is still highly challenging. Here, the photoreactivity of TiO2 nanocrystals with respectively predominant exposed {001}, {101}, and {100} facets before and after Ti3+ doping under both ultraviolet and visible light was compared systematically. In detail, the photocatalytic H2 production for R-TiO2-001, R-TiO2-101, and R-TiO2-100 increased by a factor of 1.34, 2.65, and 3.39 under UV light and a factor of 8.90, 13.47, and 8.72 under visible light. By contrast, the photocatalytic degradation of methyl orange for R-TiO2-001, R-TiO2-101, and R-TiO2-100 increased by a factor of 3.18, 1.42, and 2.17 under UV light and a factor of 4.03, 2.85, and 1.58 under visible light, respectively. The true photocatalytic activity origin for the obtained photoreduction and photo-oxidation ability is attributed to the exposure of more active sites (under-coordinated 5-fold Ti atoms), the facilitated charge transfer among {001}, {101}, and {100} facets, and the Ti3+ energy state with variable doping levels to extend the visible light response. This work hopefully provides significant insights into the photoreactivity origin of defective TiO2 nanocrystals with anisotropic exposed facets.
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Affiliation(s)
- Xiaogang Liu
- College
of Chemistry and Chemical Engineering and Business School, Xinyang Normal University, Xinyang, Henan 464000, P. R. China
| | - Guiru Du
- College
of Chemistry and Chemical Engineering and Business School, Xinyang Normal University, Xinyang, Henan 464000, P. R. China
| | - Meng Li
- College
of Chemistry and Chemical Engineering and Business School, Xinyang Normal University, Xinyang, Henan 464000, P. R. China
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16
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Wei D, Du Q, Wang S, Cheng S, Wang Y, Li B, Jia D, Zhou Y. Rapid Fabrication, Microstructure, and in Vitro and in Vivo Investigations of a High-Performance Multilayer Coating with External, Flexible, and Silicon-Doped Hydroxyapatite Nanorods on Titanium. ACS Biomater Sci Eng 2019; 5:4244-4262. [PMID: 33417781 DOI: 10.1021/acsbiomaterials.9b00414] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A high-performance multilayer coating with external, flexible, and silicon-doped hydroxyapatite (Si-HA) nanorods was designed using bionics. Plasma electrolytic oxidation (PEO) and the microwave hydrothermal (MH) method were used to rapidly deposit this multilayer coating on a titanium (Ti) substrate, applied for 5 and 10 min, respectively. The bioactive multilayer coating was composed of four layers, and the outermost layer was an external growth layer that consisted of many Si-HA nanorods with a single-crystal structure. The Si-HA nanorods exhibited good flexibility, likely because of their complete single-crystal structures, smooth surfaces, and suitable diameters and lengths. This multilayer coating with a high surface energy was superhydrophilic and exhibited good in vitro bioactivities, such as good apatite formation ability, good cell spreading, and high osteogenic gene expression levels. After implantation in the tibia of rabbits for 16 weeks, almost no soft tissues were formed at the MH treated PEO implant-bone interface. A direct bone contact interface was formed by a bridging effect of the flexible Si-HA nanorods, which further produced a high implant-bone interface bonding strength. The current results demonstrated that the bioactive multilayer layers with the flexible Si-HA nanorods displayed a very good osseointegration ability, showing promising applications in the biomedical field.
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Affiliation(s)
- Daqing Wei
- Institute for Advanced Ceramics, Department of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.,Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China.,Center of Analysis and Measurement, Harbin Institute of Technology, Harbin 150001, China
| | - Qing Du
- Institute for Advanced Ceramics, Department of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.,Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
| | - Shaodong Wang
- Institute for Advanced Ceramics, Department of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.,Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
| | - Su Cheng
- Department of Mechanical Engineering, School of Architecture and Civil Engineering, Harbin University of Science and Technology, Harbin 150001, China
| | - Yaming Wang
- Institute for Advanced Ceramics, Department of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.,Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
| | - Baoqiang Li
- Institute for Advanced Ceramics, Department of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.,Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
| | - Dechang Jia
- Institute for Advanced Ceramics, Department of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.,Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
| | - Yu Zhou
- Institute for Advanced Ceramics, Department of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.,Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
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17
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Wei B, Tielens F, Calatayud M. Understanding the Role of Rutile TiO 2 Surface Orientation on Molecular Hydrogen Activation. NANOMATERIALS 2019; 9:nano9091199. [PMID: 31454939 PMCID: PMC6780095 DOI: 10.3390/nano9091199] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 08/10/2019] [Accepted: 08/16/2019] [Indexed: 11/30/2022]
Abstract
Titanium oxide (TiO2) has been widely used in many fields, such as photocatalysis, photovoltaics, catalysis, and sensors, where its interaction with molecular H2 with TiO2 surface plays an important role. However, the activation of hydrogen over rutile TiO2 surfaces has not been systematically studied regarding the surface termination dependence. In this work, we use density functional theory (PBE+U) to identify the pathways for two processes: the heterolytic dissociation of H2 as a hydride–proton pair, and the subsequent H transfer from Ti to near O accompanied by reduction of the Ti sites. Four stoichiometric surface orientations were considered: (001), (100), (110), and (101). The lowest activation barriers are found for hydrogen dissociation on (001) and (110), with energies of 0.56 eV and 0.50 eV, respectively. The highest activation barriers are found on (100) and (101), with energies of 1.08 eV and 0.79 eV, respectively. For hydrogen transfer from Ti to near O, the activation barriers are higher (from 1.40 to 1.86 eV). Our results indicate that the dissociation step is kinetically more favorable than the H transfer process, although the latter is thermodynamically more favorable. We discuss the implications in the stability of the hydride–proton pair, and provide structures, electronic structure, vibrational analysis, and temperature effects to characterize the reactivity of the four TiO2 orientations.
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Affiliation(s)
- Baohuan Wei
- Sorbonne Université, CNRS, Laboratoire de Chimie Théorique, LCT, F. 75005 Paris, France
| | - Frederik Tielens
- General Chemistry (ALGC), Materials Modelling Group, Vrije Universiteit Brussel (Free University Brussels-VUB), Pleinlaan 2, 1050 Brussel, Belgium
| | - Monica Calatayud
- Sorbonne Université, CNRS, Laboratoire de Chimie Théorique, LCT, F. 75005 Paris, France.
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18
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Kundu S, Sain S, Choudhury P, Sarkar S, Das PK, Pradhan SK. Microstructure characterization of biocompatible heterojunction hydrogen titanate-Ag 2O nanocomposites for superior visible light photocatalysis and antibacterial activity. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 99:374-386. [PMID: 30889712 DOI: 10.1016/j.msec.2019.01.124] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 12/22/2018] [Accepted: 01/28/2019] [Indexed: 10/27/2022]
Abstract
Hydrogen trititanate (H2Ti3O7·2H2O) and hydrogen trititanate/Ag2O hybrid nanocomposites (NCs) with novel structure have been synthesized by a simple solvothermal route followed by Na+/H+ ion-exchange. Growths of hydrogen trititanate with nanofiber (HTNF) and nanotube (HTNT) morphologies and hydrogen trititanate-Ag2O (HTFAG and HTTAG) nanocomposites have been tailored by controlling the solvent media. Detailed microstructure characterization of all these samples have been carried out by Rietveld refinement of XRD data and analyzing FESEM/HRTEM micrographs and FTIR spectra. Band gap energies of all these semiconducting samples are obtained from UV-Vis absorption spectra. Both HTFAG and HTTAG NCs exhibit enhanced photocatalytic degradation of organic pollutant (Congo red dye) under visible light, in comparison to HTNF and HTNT respectively due to the formation of a heterojunction between H2Ti3O7·2H2O and Ag2O, which is supported by photoluminescence spectroscopy. HTFAG and HTTAG NCs also show superior antibacterial activity against both gram-negative (Escherichia coli) and gram-positive (Bacillus subtilis) bacteria compared to their pure counterparts. MTT assay reflects a sufficiently high percentage of cell viability and confirms the significant cytocompatibility of all the samples.
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Affiliation(s)
- Samapti Kundu
- Materials Science Division, Department of Physics, The University of Burdwan, Golapbag, Burdwan 713104, West Bengal, India
| | - Sumanta Sain
- Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, West Bengal, India
| | - Pritam Choudhury
- Department of Biological Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, West Bengal, India
| | - Saheli Sarkar
- Department of Biological Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, West Bengal, India
| | - Prasanta Kumar Das
- Department of Biological Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, West Bengal, India
| | - Swapan Kumar Pradhan
- Materials Science Division, Department of Physics, The University of Burdwan, Golapbag, Burdwan 713104, West Bengal, India.
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19
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Kozelskaya AI, Bolbasov EN, Golovkin AS, Mishanin AI, Viknianshchuk AN, Shesterikov EV, Ashrafov А, Novikov VA, Fedotkin AY, Khlusov IA, Tverdokhlebov SI. Modification of the Ceramic Implant Surfaces from Zirconia by the Magnetron Sputtering of Different Calcium Phosphate Targets: A Comparative Study. MATERIALS 2018; 11:ma11101949. [PMID: 30314394 PMCID: PMC6213365 DOI: 10.3390/ma11101949] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 10/06/2018] [Accepted: 10/08/2018] [Indexed: 01/22/2023]
Abstract
In this study, thin calcium phosphate (Ca-P) coatings were deposited on zirconia substrates by radiofrequency (RF) magnetron sputtering using different calcium phosphate targets (calcium phosphate tribasic (CPT), hydroxyapatite (HA), calcium phosphate monobasic, calcium phosphate dibasic dehydrate (DCPD) and calcium pyrophosphate (CPP) powders). The sputtering of calcium phosphate monobasic and DCPD powders was carried out without an inert gas in the self-sustaining plasma mode. The physico-chemical, mechanical and biological properties of the coatings were investigated. Cell adhesion on the coatings was examined using mesenchymal stem cells (MSCs). The CPT coating exhibited the best cell adherence among all the samples, including the uncoated zirconia substrate. The cells were spread uniformly over the surfaces of all samples.
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Affiliation(s)
- Anna I Kozelskaya
- Laboratory for Plasma Hybrid Systems, The Weinberg Research Center, School of Nuclear Science & Engineering, Tomsk Polytechnic University, 634050 Tomsk, Russia.
| | - Evgeny N Bolbasov
- Laboratory for Plasma Hybrid Systems, The Weinberg Research Center, School of Nuclear Science & Engineering, Tomsk Polytechnic University, 634050 Tomsk, Russia.
| | - Alexey S Golovkin
- Institution of molecular biology and genetics, Almazov National Medical Research Centre, 197341 Saint Petersburg, Russia.
| | - Alexander I Mishanin
- Institution of molecular biology and genetics, Almazov National Medical Research Centre, 197341 Saint Petersburg, Russia.
| | - Alice N Viknianshchuk
- Institution of molecular biology and genetics, Almazov National Medical Research Centre, 197341 Saint Petersburg, Russia.
| | - Evgeny V Shesterikov
- Laboratory for Plasma Hybrid Systems, The Weinberg Research Center, School of Nuclear Science & Engineering, Tomsk Polytechnic University, 634050 Tomsk, Russia.
- Laboratory of Lidar Methods, V.E. Zuev Institute of Atmospheric Optics SB RAS, 634055 Tomsk, Russia.
| | - Аndrey Ashrafov
- Laboratory for Plasma Hybrid Systems, The Weinberg Research Center, School of Nuclear Science & Engineering, Tomsk Polytechnic University, 634050 Tomsk, Russia.
| | - Vadim A Novikov
- Faculty of Physics, Department of Semiconductor Physics, Tomsk State University, 634050 Tomsk, Russia.
| | - Alexander Y Fedotkin
- Laboratory for Plasma Hybrid Systems, The Weinberg Research Center, School of Nuclear Science & Engineering, Tomsk Polytechnic University, 634050 Tomsk, Russia.
| | - Igor A Khlusov
- Research School of Chemistry & Applied Biomedical Sciences, Tomsk Polytechnic University, 634050 Tomsk, Russia.
- Department of Morphology and General Pathology, Siberian State Medical University, 634050 Tomsk, Russia.
- Institute of Living Systems, Immanuel Kant Baltic Federal University, 236041 Kaliningrad, Russia.
| | - Sergey I Tverdokhlebov
- Laboratory for Plasma Hybrid Systems, The Weinberg Research Center, School of Nuclear Science & Engineering, Tomsk Polytechnic University, 634050 Tomsk, Russia.
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20
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Rasouli R, Barhoum A, Uludag H. A review of nanostructured surfaces and materials for dental implants: surface coating, patterning and functionalization for improved performance. Biomater Sci 2018; 6:1312-1338. [PMID: 29744496 DOI: 10.1039/c8bm00021b] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The emerging field of nanostructured implants has enormous scope in the areas of medical science and dental implants. Surface nanofeatures provide significant potential solutions to medical problems by the introduction of better biomaterials, improved implant design, and surface engineering techniques such as coating, patterning, functionalization and molecular grafting at the nanoscale. This review is of an interdisciplinary nature, addressing the history and development of dental implants and the emerging area of nanotechnology in dental implants. After a brief introduction to nanotechnology in dental implants and the main classes of dental implants, an overview of different types of nanomaterials (i.e. metals, metal oxides, ceramics, polymers and hydrides) used in dental implant together with their unique properties, the influence of elemental compositions, and surface morphologies and possible applications are presented from a chemical point of view. In the core of this review, the dental implant materials, physical and chemical fabrication techniques and the role of nanotechnology in achieving ideal dental implants have been discussed. Finally, the critical parameters in dental implant design and available data on the current dental implant surfaces that use nanotopography in clinical dentistry have been discussed.
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Affiliation(s)
- Rahimeh Rasouli
- Department of Medical Nanotechnology, International Campus, Tehran University of Medical Sciences, Tehran, Iran.
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21
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Cheng Y, Yang H, Yang Y, Huang J, Wu K, Chen Z, Wang X, Lin C, Lai Y. Progress in TiO 2 nanotube coatings for biomedical applications: a review. J Mater Chem B 2018; 6:1862-1886. [PMID: 32254353 DOI: 10.1039/c8tb00149a] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Titanium dioxide nanotubes (TNTs) have drawn wide attention and been extensively applied in the field of biomedicine, due to their large specific surface area, good corrosion resistance, excellent biocompatibility, and enhanced bioactivity. This review describes the preparation of TNTs and the surface modification that entrust the nanotubes with better antibacterial property and enhanced osteoblast adhesion, proliferation, and differentiation. Considering the contact between TNTs' surface and surrounding tissues after implantation, the interactions between TNTs (with properties including their diameter, length, wettability, and crystalline phase) and proteins, platelets, bacteria, and cells are illustrated. The state of the art in the applications of TNTs in dentistry, orthopedic implants, and cardiovascular stents are introduced. In particular, the application of TNTs in biosensing has attracted much attention due to its ability for the rapid diagnosis of diseases. Finally, the difficulties and challenges in the practical application of TNTs are also discussed.
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Affiliation(s)
- Yan Cheng
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, P. R. China.
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One-step fabrication of functionalized poly(etheretherketone) surfaces with enhanced biocompatibility and osteogenic activity. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 88:70-78. [PMID: 29636140 DOI: 10.1016/j.msec.2018.03.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 08/28/2017] [Accepted: 03/09/2018] [Indexed: 02/06/2023]
Abstract
Polyetheretherketone (PEEK) has an elastic modulus similar to that of the bone; however, its use as a material for bone repair is limited by bio-inert surface chemistry and poor osteogenesis-inducing capacity. To address this issue, the PEEK surface was activated by ultraviolet radiation-induced grafting of methacrylated hyaluronic acid (MeHA) and titanium dioxide (TiO2) nanofibers via a one-step process. The modified PEEK surface was characterized by X-ray photoelectron and Fourier-transform infrared spectroscopy, and the extent of surface modification was evaluated by measuring static contact angles. Atomic force microscopy revealed that the PEEK surface grafted with electrospun TiO2 had abundant nanofibers and a roughness that was comparable to that of human cortical bone. In vitro experiment, rat bone mesenchymal stem cells showed increased adhesion, proliferation, and osteogenic differentiation capacity on TiO2-modified as compared to unmodified PEEK. Thus, PEEK that is surface-modified with electrospun TiO2 and MeHA has enhanced biocompatibility and can be an effective material for use in orthopedic implants and medical devices.
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23
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Wang R, He X, Gao Y, Zhang X, Yao X, Tang B. Antimicrobial property, cytocompatibility and corrosion resistance of Zn-doped ZrO 2 /TiO 2 coatings on Ti6Al4V implants. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 75:7-15. [DOI: 10.1016/j.msec.2017.02.036] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 12/13/2016] [Accepted: 02/08/2017] [Indexed: 11/25/2022]
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24
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Azadmanjiri J, Wang PY, Pingle H, Kingshott P, Wang J, Srivastava VK, Kapoor A. Enhanced attachment of human mesenchymal stem cells on nanograined titania surfaces. RSC Adv 2016. [DOI: 10.1039/c6ra10289a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
TiO2 nanotubes on the nanograined Ti surface improved cell attachment and proliferation together with physical and mechanical properties.
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Affiliation(s)
- Jalal Azadmanjiri
- School of Engineering
- Faculty of Science
- Engineering and Technology
- Swinburne University of Technology
- Australia
| | - Peng-Yuan Wang
- Department of Chemistry and Biotechnology
- Swinburne University of Technology
- Australia
| | - Hitesh Pingle
- Department of Chemistry and Biotechnology
- Swinburne University of Technology
- Australia
| | - Peter Kingshott
- Department of Chemistry and Biotechnology
- Swinburne University of Technology
- Australia
| | - James Wang
- School of Engineering
- Faculty of Science
- Engineering and Technology
- Swinburne University of Technology
- Australia
| | - Vijay K. Srivastava
- Department of Mechanical Engineering
- Indian Institute of Technology
- Varanasi – 221005
- India
| | - Ajay Kapoor
- School of Engineering
- Faculty of Science
- Engineering and Technology
- Swinburne University of Technology
- Australia
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25
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Ito K, Sugita Y, Saito T, Komatsu S, Sato N, Isomura M, Yoshida W, Kubo K, Maeda H. Effects of Nicotinamide on Cytotoxicity-induced Morphological Changes in Osteoblastic Cells <i>In Vitro</i>. J HARD TISSUE BIOL 2016. [DOI: 10.2485/jhtb.25.357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Koji Ito
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
- Aichi Implant Center
| | - Yoshihiko Sugita
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
- Center of Advanced Oral Science, Aichi Gakuin University
| | - Takashi Saito
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
- Aichi Implant Center
| | - Shinichi Komatsu
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
- Aichi Implant Center
| | - Nobuaki Sato
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
| | - Madoka Isomura
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
| | - Waka Yoshida
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
- Center of Advanced Oral Science, Aichi Gakuin University
| | - Katsutoshi Kubo
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
- Center of Advanced Oral Science, Aichi Gakuin University
| | - Hatsuhiko Maeda
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
- Center of Advanced Oral Science, Aichi Gakuin University
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Nanomodified Peek Dental Implants: Bioactive Composites and Surface Modification-A Review. Int J Dent 2015; 2015:381759. [PMID: 26495000 PMCID: PMC4606406 DOI: 10.1155/2015/381759] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 06/30/2015] [Indexed: 12/21/2022] Open
Abstract
Purpose. The aim of this review is to summarize and evaluate the relevant literature regarding the different ways how polyetheretherketone (PEEK) can be modified to overcome its limited bioactivity, and thereby making it suitable as a dental implant material. Study Selection. An electronic literature search was conducted via the PubMed and Google Scholar databases using the keywords “PEEK dental implants,” “nano,” “osseointegration,” “surface treatment,” and “modification.” A total of 16 in vivo and in vitro studies were found suitable to be included in this review. Results. There are many viable methods to increase the bioactivity of PEEK. Most methods focus on increasing the surface roughness, increasing the hydrophilicity and coating osseoconductive materials. Conclusion. There are many ways in which PEEK can be modified at a nanometer level to overcome its limited bioactivity. Melt-blending with bioactive nanoparticles can be used to produce bioactive nanocomposites, while spin-coating, gas plasma etching, electron beam, and plasma-ion immersion implantation can be used to modify the surface of PEEK implants in order to make them more bioactive. However, more animal studies are needed before these implants can be deemed suitable to be used as dental implants.
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27
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Kono M, Aita H, Ichioka Y, Kado T, Endo K, Koshino H. NaOCl-mediated biofunctionalization enhances bone-titanium integration. Dent Mater J 2015; 34:537-44. [PMID: 26235721 DOI: 10.4012/dmj.2015-010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The aim of this study was to examine the effect of NaOCl pretreatment on the biomechanical fixation of implant at the early healing stage of a rat model. Polished titanium cylindrical implants and disks were prepared, and one-half of these samples were dual acidetched. Then, one-half of both surfaces were chemically-cleaned by pretreatment with 5% NaOCl solution for 24 h. Morphological analyses showed that there was no significant difference between before and after NaOCl treatment. The wettability measurement demonstrated that NaOCl treatment secondarily converted both titanium surfaces from hydrophobic to superhydrophilic, accompanied by the removal of hydrocarbons from the titanium surfaces. Biomechanical push-in test indicated that the bone-titanium integration strength of the NaOCl-treated implants were significantly greater than that of the untreated implants (p<0.05). These results showed that NaOCl pretreatment enhanced the osseointegration capability of titanium, indicating its potential for a simple chemical chair-side pretreatment method.
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Affiliation(s)
- Mai Kono
- Department of Oral Rehabilitation, Division of Occlusion and Removable Prosthodontics, Health Sciences University of Hokkaido
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28
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Shibata Y, Tanimoto Y. A review of improved fixation methods for dental implants. Part I: Surface optimization for rapid osseointegration. J Prosthodont Res 2015; 59:20-33. [DOI: 10.1016/j.jpor.2014.11.007] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 11/05/2014] [Accepted: 11/17/2014] [Indexed: 10/24/2022]
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Pachauri P, Bathala LR, Sangur R. Techniques for dental implant nanosurface modifications. J Adv Prosthodont 2014; 6:498-504. [PMID: 25558347 PMCID: PMC4279049 DOI: 10.4047/jap.2014.6.6.498] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 08/10/2014] [Accepted: 08/29/2014] [Indexed: 11/08/2022] Open
Abstract
PURPOSE Dental implant has gained clinical success over last decade with the major drawback related to osseointegration as properties of metal (Titanium) are different from human bone. Currently implant procedures include endosseous type of dental implants with nanoscale surface characteristics. The objective of this review article is to summarize the role of nanotopography on titanium dental implant surfaces in order to improve osseointegration and various techniques that can generate nanoscale topographic features to titanium implants. MATERIALS AND METHODS A systematic electronic search of English language peer reviewed dental literature was performed for articles published between December 1987 to January 2012. Search was conducted in Medline, PubMed and Google scholar supplemented by hand searching of selected journals. 101 articles were assigned to full text analysis. Articles were selected according to inclusion and exclusion criterion. All articles were screened according to inclusion standard. 39 articles were included in the analysis. RESULTS Out of 39 studies, seven studies demonstrated that bone implant contact increases with increase in surface roughness. Five studies showed comparative evaluation of techniques producing microtopography and nanotopography. Eight studies concluded that osteoblasts preferably adhere to nano structure as compared to smooth surface. Six studies illustrated that nanotopography modify implant surface and their properties. Thirteen studies described techniques to produce nano roughness. CONCLUSION Modification of dental osseous implants at nanoscale level produced by various techniques can alter biological responses that may improve osseointegration and dental implant procedures.
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Affiliation(s)
- Preeti Pachauri
- Department of Prosthodontics, Faculty of Dentistry, Rama Dental College-Hospital & Research Centre, Kanpur, India
| | - Lakshmana Rao Bathala
- Department of Prosthodontics, Faculty of Dentistry, Lenora Institute of Dental Sciences, Andhra Pradesh, India
| | - Rajashekar Sangur
- Department of Prosthodontics, Faculty of Dentistry, Rama Dental College-Hospital & Research Centre, Kanpur, India
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30
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Logan N, Sherif A, Cross AJ, Collins SN, Traynor A, Bozec L, Parkin IP, Brett P. TiO
2
‐coated CoCrMo: Improving the osteogenic differentiation and adhesion of mesenchymal stem cells
in vitro. J Biomed Mater Res A 2014; 103:1208-17. [DOI: 10.1002/jbm.a.35264] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 06/02/2014] [Accepted: 06/10/2014] [Indexed: 01/05/2023]
Affiliation(s)
- Niall Logan
- Biomaterials and Tissue EngineeringUniversity College London, Eastman Dental InstituteLondonWC1X 8LD United Kingdom
| | - Anas Sherif
- Biomaterials and Tissue EngineeringUniversity College London, Eastman Dental InstituteLondonWC1X 8LD United Kingdom
| | - Alison J. Cross
- Department of ChemistryUniversity College LondonLondonWC1H 0AJ United Kingdom
| | | | - Alison Traynor
- Corin Ltd, CirencesterGloucestershireGL7 1YJ United Kingdom
| | - Laurent Bozec
- Biomaterials and Tissue EngineeringUniversity College London, Eastman Dental InstituteLondonWC1X 8LD United Kingdom
| | - Ivan P. Parkin
- Department of ChemistryUniversity College LondonLondonWC1H 0AJ United Kingdom
| | - Peter Brett
- Biomaterials and Tissue EngineeringUniversity College London, Eastman Dental InstituteLondonWC1X 8LD United Kingdom
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31
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Si J, Zhang J, Liu S, Zhang W, Yu D, Wang X, Guo L, Shen SGF. Characterization of a micro-roughened TiO2/ZrO2 coating: mechanical properties and HBMSC responses in vitro. Acta Biochim Biophys Sin (Shanghai) 2014; 46:572-81. [PMID: 24850303 DOI: 10.1093/abbs/gmu040] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Previous studies have shown that using ZrO2 as a second phase to bioceramics can significantly increase the bonding strength of plasma-sprayed composite material. In the present study, micro-roughened titanium dioxide/zirconia (TiO2/ZrO2) (30 wt% ZrO2) coating and TiO2 coating were plasma-sprayed onto Ti plates. The micro-structural characteristics and mechanical properties of both coatings were investigated. Furthermore, the biological behavior and osteogenic differentiation of human bone marrow mesenchymal stem cells (HBMSCs) on both TiO2/ZrO2 and TiO2 coatings were compared. The results indicated that the shear bond strength and microhardness of TiO2/ZrO2 coating were statistically higher than those of TiO2 coating. Scanning electron microscope observation revealed that more irregularly shaped protuberances and denser pores were formed on the surface of TiO2/ZrO2 coating compared with those of TiO2 coating. Further comparative analysis of HBMSC proliferation and osteogenic differentiation on both coatings showed that significantly higher cellular alkaline phosphatase activity and expression levels of Runx2 and Osterix at day 10 after osteogenic culture were found on TiO2/ZrO2 coating compared with TiO2 coating, while no statistically significant difference in cell proliferation and extracellular calcium deposition was observed. The present study suggests that TiO2/ZrO2 coating may be favorable for dental implant applications.
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Affiliation(s)
- Jiawen Si
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - Jianjun Zhang
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - Sha Liu
- Shanghai United Stem Cell Biotechnology Co. Ltd, Shanghai 200333, China
| | - Wenbin Zhang
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - Dedong Yu
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - Xudong Wang
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - Lihe Guo
- Shanghai United Stem Cell Biotechnology Co. Ltd, Shanghai 200333, China Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Steve G F Shen
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China
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Yu L, Qian S, Qiao Y, Liu X. Multifunctional Mn-containing titania coatings with enhanced corrosion resistance, osteogenesis and antibacterial activity. J Mater Chem B 2014; 2:5397-5408. [DOI: 10.1039/c4tb00594e] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Liu G, Yang HG, Pan J, Yang YQ, Lu GQ(M, Cheng HM. Titanium Dioxide Crystals with Tailored Facets. Chem Rev 2014; 114:9559-612. [DOI: 10.1021/cr400621z] [Citation(s) in RCA: 815] [Impact Index Per Article: 81.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Gang Liu
- Shenyang
National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
| | - Hua Gui Yang
- Key
Laboratory for Ultrafine Materials of Ministry of Education, School
of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
- Centre
for Clean Environment and Energy, Gold Coast Campus, Griffith University, Queensland 4222, Australia
| | - Jian Pan
- Shenyang
National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
- ARC
Centre of Excellence for Functional Nanomaterials, Australian Institute
for Bioengineering and Nanotechnology, The University of Queensland, Queensland 4072, Australia
| | - Yong Qiang Yang
- Shenyang
National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
- Department of Materials Science & Technology, School of Chemistry and Materials Science, University of Science and Technology of China, 96 Jinzhai Road, HeFei 230026, China
| | - Gao Qing (Max) Lu
- ARC
Centre of Excellence for Functional Nanomaterials, Australian Institute
for Bioengineering and Nanotechnology, The University of Queensland, Queensland 4072, Australia
| | - Hui-Ming Cheng
- Shenyang
National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
- Chemistry
Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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Zhou J, Han Y, Lu S. Direct role of interrod spacing in mediating cell adhesion on Sr-HA nanorod-patterned coatings. Int J Nanomedicine 2014; 9:1243-60. [PMID: 24634585 PMCID: PMC3952902 DOI: 10.2147/ijn.s58236] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The process in which nanostructured surfaces mediate cell adhesion is not well understood, and may be indirect (via protein adsorption) or direct. We prepared Sr-doped hydroxyapatite (Sr1-HA) 3D nanorods (with interrod spacing of 67.3 ± 3.8, 95.7 ± 4.2, and 136.8 ± 8.7 nm) and 2D nanogranulate patterned coatings on titanium. Employing the coatings under the same surface chemistry and roughness, we investigated the indirect/direct role of Sr1-HA nanotopographies in the regulation of osteoblast adhesion in both serum-free and serum-containing Dulbecco's Modified Eagle/Ham's Medium. The results reveal that the number of adherent cells, cell-secreted anchoring proteins (fibronectin, vitronectin, and collagen), vinculin and focal adhesion kinase (FAK) denoted focal adhesion (FA) contact, and gene expression of vinculin, FAK, and integrin subunits (α2, α5, αv, β1, and β3), undergo significant changes in the inter-nanorod spacing and dimensionality of Sr1-HA nanotopographies in the absence of serum; they are significantly enhanced on the <96 nm spaced nanorods and more pronounced with decreasing interrod spacing. However, they are inhibited on the >96 nm spaced nanorods compared to nanogranulated 2D topography. Although the adsorption of fibronectin and vitronectin from serum are higher on 136.8 ± 8.7 nm spaced nanorod patterned topography than nanogranulated topography, cell adhesion is inhibited on the former compared to the latter in the presence of serum, further suggesting that reduced cell adhesion is independent of protein adsorption. It is clearly indicated that 3D nanotopography can directly modulate cell adhesion by regulating integrins, which subsequently mediate anchoring proteins' secretion and FA formation rather than via protein adsorption.
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Affiliation(s)
- Jianhong Zhou
- State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, People’s Republic of China
| | - Yong Han
- State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, People’s Republic of China
| | - Shemin Lu
- Department of Genetics and Molecular Biology, College of Medicine, Xi’an Jiaotong University, Xi’an, People’s Republic of China
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Gardon M, Melero H, Garcia-Giralt N, Dosta S, Cano IG, Guilemany JM. Enhancing the bioactivity of polymeric implants by means of cold gas spray coatings. J Biomed Mater Res B Appl Biomater 2014; 102:1537-43. [DOI: 10.1002/jbm.b.33134] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Revised: 01/20/2014] [Accepted: 02/10/2014] [Indexed: 11/06/2022]
Affiliation(s)
- M. Gardon
- Thermal Spray Centre, CPT; University of Barcelona; Martí i Franquès, 1 08028 Barcelona Spain
| | - H. Melero
- Thermal Spray Centre, CPT; University of Barcelona; Martí i Franquès, 1 08028 Barcelona Spain
- URFOA; IMIM (Institut Hospital del Mar d'Investigacions Mèdiques); RETICEF, Doctor Aiguader, 80 08003 Barcelona Spain
| | - N. Garcia-Giralt
- URFOA; IMIM (Institut Hospital del Mar d'Investigacions Mèdiques); RETICEF, Doctor Aiguader, 80 08003 Barcelona Spain
| | - S. Dosta
- Thermal Spray Centre, CPT; University of Barcelona; Martí i Franquès, 1 08028 Barcelona Spain
| | - I. G. Cano
- Thermal Spray Centre, CPT; University of Barcelona; Martí i Franquès, 1 08028 Barcelona Spain
| | - J. M. Guilemany
- Thermal Spray Centre, CPT; University of Barcelona; Martí i Franquès, 1 08028 Barcelona Spain
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36
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Tseng WY, Hsu SH, Huang CH, Tu YC, Tseng SC, Chen HL, Chen MH, Su WF, Lin LD. Low pressure radio-frequency oxygen plasma induced oxidation of titanium--surface characteristics and biological effects. PLoS One 2014; 8:e84898. [PMID: 24386433 PMCID: PMC3873422 DOI: 10.1371/journal.pone.0084898] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Accepted: 11/27/2013] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVE This research was designed to investigate the effects of low pressure radio-frequency (RF) oxygen plasma treatment (OPT) on the surface of commercially pure titanium (CP-Ti) and Ti6Al4V. Surface topography, elemental composition, water contact angle, cell viability, and cell morphology were surveyed to evaluate the biocompatibility of titanium samples with different lengths of OP treating time. MATERIALS AND METHODS CP-Ti and Ti6Al4V discs were both classified into 4 groups: untreated, treated with OP generated by using oxygen (99.98%) for 5, 10, and 30 min, respectively. After OPT on CP-Ti and Ti6Al4V samples, scanning probe microscopy, X-ray photoelectron spectrometry (XPS), and contact angle tests were conducted to determine the surface topography, elemental composition and hydrophilicity, respectively. The change of surface morphology was further studied using sputtered titanium on silicon wafers. 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT) assay and F-actin immunofluorescence stain were performed to investigate the viability and spreading behavior of cultivated MG-63 cells on the samples. RESULTS The surface roughness was most prominent after 5 min OPT in both CP-Ti and Ti6Al4V, and the surface morphology of sputtered Ti sharpened after the 5 min treatment. From the XPS results, the intensity of Ti(°), Ti(2+), and Ti(3+) of the samples' surface decreased indicating the oxidation of titanium after OPT. The water contact angles of both CP-Ti and Ti6Al4V were increased after 5 min OPT. The results of MTT assay demonstrated MG-63 cells proliferated best on the 5 min OP treated titanium sample. The F-actin immunofluorescence stain revealed the cultivated cell number of 5 min treated CP-Ti/Ti6Al4V was greater than other groups and most of the cultivated cells were spindle-shaped. CONCLUSIONS Low pressure RF oxygen plasma modified both the composition and the morphology of titanium samples' surface. The CP-Ti/Ti6Al4V treated with 5 min OPT displayed the roughest surface, sharpest surface profile and best biocompatibility.
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Affiliation(s)
- Wan-Yu Tseng
- School of Dentistry, National Taiwan University, Taipei, Taiwan
- Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan
| | - Sheng-Hao Hsu
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei, Taiwan
| | | | - Yu-Chieh Tu
- Department of Materials Science and Engineering, National Taiwan University, Taipei, Taiwan
| | - Shao-Chin Tseng
- Department of Materials Science and Engineering, National Taiwan University, Taipei, Taiwan
| | - Hsuen-Li Chen
- Department of Materials Science and Engineering, National Taiwan University, Taipei, Taiwan
| | - Min-Huey Chen
- School of Dentistry, National Taiwan University, Taipei, Taiwan
- Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan
| | - Wei-Fang Su
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei, Taiwan
- Department of Materials Science and Engineering, National Taiwan University, Taipei, Taiwan
| | - Li-Deh Lin
- School of Dentistry, National Taiwan University, Taipei, Taiwan
- Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan
- * E-mail:
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37
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Rowlands DS, Shultz SP, Ogawa T, Aoi W, Korte M. The effects of uniquely-processed titanium on biological systems: implications for human health and performance. J Funct Biomater 2014; 5:1-14. [PMID: 24956353 PMCID: PMC4030905 DOI: 10.3390/jfb5010001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 11/26/2013] [Accepted: 11/27/2013] [Indexed: 11/19/2022] Open
Abstract
Titanium is biocompatible and widely utilized in a variety of applications. Recently, titanium in pico-nanometer scale and soluble form (Aqua Titan) has expanded its use to applied human health and performance. The purpose of this article is to review the current evidence associated with specific physiological responses to Aqua Titan-treated materials. In vitro studies have shown that application of Aqua Titan can modify membrane potential and long-term potentiation in isolated hippocampal neurons, suggesting reduced pain memory as a possible mechanism for reported analgesia. Proximal contact with Aqua Titan-treated titanium increased gene expression, protein synthesis, cell growth and adhesion in normal cultured muscle and bone cells, suggesting application for Aqua Titan in clinical implant procedures and wound healing. Evidence for beneficial effects on neuromuscular control of muscle-tendon function and improvements in running economy in human athletes was seen when Aqua Titan-treated tape was applied to the human triceps surae following fatigue induced by prior strenuous exercise. Finally, behavioral responses and effects on the autonomic nervous system to environmental exposure suggest Aqua Titan may promote a mild relaxant, or stress-suppressive response. Together, data suggest exposure to Aqua Titan-treated materials modulates aspects of growth and function in neuronal and other musculoskeletal cells with possible benefits to musculotendinous recovery from exercise and to the systemic response to stress.
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Affiliation(s)
- David S Rowlands
- School of Sport and Exercise, Massey University, 63 Wallace Street, Wellington 6140, New Zealand.
| | - Sarah P Shultz
- School of Sport and Exercise, Massey University, 63 Wallace Street, Wellington 6140, New Zealand.
| | - Takahiro Ogawa
- University of California, Los Angeles, School of Dentistry, B3-088H CHS, 10833 Le Conte Ave, Los Angeles, CA 90095-1668, USA.
| | - Wataru Aoi
- Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Shimogamo Hangi-cho 1-5, Sakyo-ku, Kyoto 606-8522, Japan.
| | - Martin Korte
- Zoological Institute, Technical University of Braunschweig, Spielmannstr. 7, Braunschweig D-38106, Germany.
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Bae H, Chu H, Edalat F, Cha JM, Sant S, Kashyap A, Ahari AF, Kwon CH, Nichol JW, Manoucheri S, Zamanian B, Wang Y, Khademhosseini A. Development of functional biomaterials with micro- and nanoscale technologies for tissue engineering and drug delivery applications. J Tissue Eng Regen Med 2014; 8:1-14. [PMID: 22711442 PMCID: PMC4199309 DOI: 10.1002/term.1494] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Revised: 01/07/2012] [Accepted: 01/24/2012] [Indexed: 12/13/2022]
Abstract
Micro- and nanotechnologies have emerged as potentially effective fabrication tools for addressing the challenges faced in tissue engineering and drug delivery. The ability to control and manipulate polymeric biomaterials at the micron and nanometre scale with these fabrication techniques has allowed for the creation of controlled cellular environments, engineering of functional tissues and development of better drug delivery systems. In tissue engineering, micro- and nanotechnologies have enabled the recapitulation of the micro- and nanoscale detail of the cell's environment through controlling the surface chemistry and topography of materials, generating 3D cellular scaffolds and regulating cell-cell interactions. Furthermore, these technologies have led to advances in high-throughput screening (HTS), enabling rapid and efficient discovery of a library of materials and screening of drugs that induce cell-specific responses. In drug delivery, controlling the size and geometry of drug carriers with micro- and nanotechnologies have allowed for the modulation of parametres such as bioavailability, pharmacodynamics and cell-specific targeting. In this review, we introduce recent developments in micro- and nanoscale engineering of polymeric biomaterials, with an emphasis on lithographic techniques, and present an overview of their applications in tissue engineering, HTS and drug delivery.
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Affiliation(s)
- Hojae Bae
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Hunghao Chu
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Faramarz Edalat
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Jae Min Cha
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Shilpa Sant
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Aditya Kashyap
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Information Technology and Electrical Engineering, Swiss Federal Institute of Technology Zurich (ETH), 8092 Zurich, Switzerland
| | - Amir F. Ahari
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Chung Hoon Kwon
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Jason W. Nichol
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Sam Manoucheri
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Behnam Zamanian
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Yadong Wang
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Ali Khademhosseini
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
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Hughes JD, Fink PW, Graham DF, Rowlands DS. Effect of microtitanium impregnated tape on the recovery of triceps surae musculotendinous function following strenuous running. SPRINGERPLUS 2013; 2:653. [PMID: 24349956 PMCID: PMC3863395 DOI: 10.1186/2193-1801-2-653] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Accepted: 11/28/2013] [Indexed: 11/23/2022]
Abstract
We previously reported increased running economy and joint range of motion (ROM) during subsequent exercise performed 48-h following strenuous exercise while wearing garments containing micro-titanium particles generated from high-pressure aqueous processing of titanium (AQUA TITANTM). Here we utilised an isolated plantarflexion triceps surae model and AQUA TITAN-treated flexible tape to determine if dermal application of the micro-titanium could account for meaningful changes in functional properties of the musculotendinous unit. In a randomised double-blind crossover, 20 trained men day 1, baseline measures, AQUA TITAN or placebo tape covering the triceps surae, intermittent high-intensity treadmill running; day 2, rest; day 3, post-stress post-treatment outcome measures. Outcomes comprised: plantarflexion ROM via isokinetic dynamometry; short latency reflex from electromyography; Achilles tendon stiffness from isometric dynamometry, ultrasonography (Achilles-medial-gastrocnemius junction), motion analysis, and force-length modelling. High-intensity exercise with placebo tape reduced tendon stiffness (-16.5%; 95% confidence limits ±8.1%; small effect size), relative to non-taped baseline, but this effect was negligible (-5.9%; ±9.2%) with AQUA TITAN (AQUA TITAN-placebo difference -11.3%; ±11.6%). Change in latency relative to baseline was trivial with placebo (1.6%; ±3.8%) but large with AQUA TITAN (-11.3%; ±3.3%). The effects on ROM with AQUA TITAN (1.6%; ±2.0%) and placebo were trivial (-1.6% ±1.9%), but the small difference (3.1%; ±2.7%) possibly greater with AQUA TITAN. AQUA TITAN tape accelerated the reflex response and attenuated reduced Achilles tendon stiffness following fatiguing exercise. Altered neuromuscular control of tendon stiffness via dermal application of micro-titanium treated materials may facilitate restoration of musculotendinous contractile performance following prior strenuous exercise.
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Affiliation(s)
- Jonathan D Hughes
- Exercise and Sport Research Centre, University of Gloucestershire, Gloucester, UK
| | - Philip W Fink
- School of Sport and Exercise, Massey University, Palmerston North, New Zealand
| | - David F Graham
- Rehabilitation Sciences, Griffith University, Gold Coast, Queensland Australia
| | - David S Rowlands
- School of Sport and Exercise, Massey University, Palmerston North, New Zealand ; School of Sport and Exercise, Massey University Wellington, Wellington, New Zealand
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Role of grain size in the regulation of osteoblast response to Ti–25Nb–3Mo–3Zr–2Sn alloy. Colloids Surf B Biointerfaces 2013; 111:232-41. [DOI: 10.1016/j.colsurfb.2013.06.007] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Revised: 05/18/2013] [Accepted: 06/04/2013] [Indexed: 11/15/2022]
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Effect of Electrical Discharging on Formation of Nanoporous Biocompatible Layer on Ti-6Al-4V Alloys. IMPLANT DENT 2013; 22:374-9. [DOI: 10.1097/id.0b013e31829a170a] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Tsaryk R, Peters K, Unger RE, Feldmann M, Hoffmann B, Heidenau F, Kirkpatrick CJ. Improving cytocompatibility of Co28Cr6Mo by TiO2 coating: gene expression study in human endothelial cells. J R Soc Interface 2013; 10:20130428. [PMID: 23825117 DOI: 10.1098/rsif.2013.0428] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Cobalt-based materials are widely used for coronary stents, as well as bone and joint implants. However, their use is associated with high corrosion incidence. Titanium alloys, by contrast, are more biocompatible owing to the formation of a relatively inactive titanium oxide (TiO2) layer on their surface. This study was aimed at improving Co28Cr6Mo alloy cytocompatibility via sol-gel TiO2 coating to reduce metal corrosion and metal ion release. Owing to their role in inflammation and tissue remodelling around an implant, endothelial cells present a suitable in vitro model for testing the biological response to metallic materials. Primary human endothelial cells seeded on Co28Cr6Mo showed a stress phenotype with numerous F-actin fibres absent on TiO2-coated material. To investigate this effect at the gene expression level, cDNA microarray analysis of in total 1301 genes was performed. Compared with control cells, 247 genes were expressed differentially in the cells grown on Co28Cr6Mo, among them genes involved in proliferation, oxidative stress response and inflammation. TiO2 coating reduced the effects of Co28Cr6Mo on gene expression in endothelial cells, with only 34 genes being differentially expressed. Quantitative real-time polymerase chain reaction and protein analysis confirmed microarray data for selected genes. The effect of TiO2 coating can be, in part, attributed to the reduced release of Co(2+), because addition of CoCl2 resulted in similar cellular responses. TiO2 coating of cobalt-based materials, therefore, could be used in the production of cobalt-based devices for cardiovascular and skeletal applications to reduce the adverse effects of metal corrosion products and to improve the response of endothelial and other cell types.
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Affiliation(s)
- R Tsaryk
- Institute of Pathology, University Medical Center, Johannes Gutenberg University of Mainz, Mainz, Germany.
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Zhou J, Li B, Lu S, Zhang L, Han Y. Regulation of osteoblast proliferation and differentiation by interrod spacing of Sr-HA nanorods on microporous titania coatings. ACS APPLIED MATERIALS & INTERFACES 2013; 5:5358-65. [PMID: 23668394 DOI: 10.1021/am401339n] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Strontium-doped hydroxyapatite (Ca9Sr1(PO4)6(OH)2, Sr1-HA) nanorods with different lateral spacing (e.g., interrod spacing) values (67.3 ± 3.8, 95.7 ± 4.2, and 136.8 ± 8.7 nm) and nanogranulates were grown on microarc-oxidized microporous TiO2, respectively, to form multilayer coatings. The coatings reveal two kinds of micro/nanoscaled hierarchical surfaces with a similar microscale roughness, e.g., nanogranulated 2D pattern and nanorod-shaped 3D pattern in nanotopography. When hFOB1.19 cells are employed, the proliferation and differentiation of osteoblasts on the coatings were evaluated by examining MTT assay, expressions of osteogenesis-related genes [alkaline phosphatase (ALP), runt-related transcription factor 2, osterix, osteopontin (OPN), osteocalcin (OCN), and collagen I (Col-I)], ALP activity, contents of intracellular Ca(2+), Col-I, OPN, and OCN, extracellular collagen secretion, and extracellular matrix mineralization. The results reveal that the proliferation and differentiation of osteoblasts can be directly regulated by the interrod spacing of the Sr1-HA nanorods, which are significantly enhanced on the nanorod-shaped 3D patterns with interrod spacing smaller than 96 nm and more pronounced with decreasing the interrod spacing but inhibited on the nanorods with spacing larger than 96 nm compared to the nanogranulated 2D pattern. The difference in the cellular activity is found to be related with the intracellular Ca(2+) concentrations, which are regulated by variation of the surface topology of Sr1-HA crystals. Our work provides insight to the surface structural design of a biomedical implant favoring osteointegration.
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Affiliation(s)
- Jianhong Zhou
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
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Lee WF, Yang TS, Wu YC, Peng PW. Nanoporous Biocompatible Layer on Ti–6Al–4V Alloys Enhanced Osteoblast-like Cell Response. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.jecm.2013.04.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Torii R, Yamamoto N, Hasegawa M, Kato S, Kawai R, Yoshida W, Sugita Y, Sato E, Kubo K, Maeda H. An Investigation of Osteogenesis on Titanium Surfaces using a Type 2 Diabetes Rat Model. J HARD TISSUE BIOL 2013. [DOI: 10.2485/jhtb.22.439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Han Y, Zhou J, Lu S, Zhang L. Enhanced osteoblast functions of narrow interligand spaced Sr-HA nano-fibers/rods grown on microporous titania coatings. RSC Adv 2013. [DOI: 10.1039/c3ra23425h] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Thalji G, Gretzer C, Cooper LF. Comparative molecular assessment of early osseointegration in implant-adherent cells. Bone 2013; 52:444-53. [PMID: 22884725 DOI: 10.1016/j.bone.2012.07.026] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 07/24/2012] [Accepted: 07/25/2012] [Indexed: 01/19/2023]
Abstract
OBJECTIVE The objective of our study is to identify the early molecular processes involved in osseointegration associated with a micro roughened and nanosurface superimposed featured implants. MATERIALS AND METHODS Thirty-two titanium implants with surface topographies exhibiting a micro roughened (AT-II) and nanosurface superimposed featured implants (AT-I) were placed in the tibiae of 8 rats and subsequently harvested at 2 and 4 days after placement. Total RNA was isolated from cells adherent to retrieved implants. A whole genome microarray using the Affymetrix Rat Gene 1.1 ST Array followed by validation of select genes through qRT-PCR was used to describe the gene expression profiles that were differentially regulated by the implant surfaces. RESULTS While significant differences at the gene level were not noted when comparing the two-implant surfaces at each time point, the microarray identified several genes that were differentially regulated at day 4 vs. day 2 for both implant surfaces. A total of 649 genes were differentially regulated at day 4 vs. day 2 in AT-I and 392 genes in AT-II implants. Functionally relevant categories related to ossification, skeletal system development, osteoblast differentiation, bone development, bone mineralization and biomineral tissue development were upregulated and more prominent at AT-I (day 4 vs. day 2) compared to AT-II. Analysis of the downregulated gene lists (day 4 vs. day 2) with average fold change >2 (were not statistically significant) revealed the biological processes involved with the inflammatory/immune response gene expression. The number of genes that were associated with the inflammatory/immune response category was greater for AT-I than AT-II. CONCLUSIONS The presence of nanosurface features modulated in vivo bone response. Gene regulation implicating osteogenesis as well as the inflammatory/immune responses that occur as a function of surface topography may affect bone mass shortly after implant placement.
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Affiliation(s)
- Ghadeer Thalji
- Department of Prosthodontics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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Titanium-treated surroundings attenuate psychological stress associated with autonomic nerve regulation in office workers with daily emotional stress. Physiol Behav 2012; 108:13-8. [PMID: 23010090 DOI: 10.1016/j.physbeh.2012.09.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Revised: 08/24/2012] [Accepted: 09/17/2012] [Indexed: 11/21/2022]
Abstract
Housing mice in the presence of small particles of titanium has been shown to reduce stress-responsive behavior via the autonomic nervous system. Here, we examined the effects of nighttime titanium exposure on stress parameters and autonomic nerve activity in office workers with emotional stress. A randomized double-blind, placebo controlled trial was performed in 24 male subjects with desk jobs, who were randomly allocated to spend 5 nights in rooms with or without titanium. The serum concentrations of stress-responsive hormones (cortisol, adrenocorticotropin, and catecholamine) were measured, and profiles of emotional stress were collected to subjectively assess relaxation. Autonomic nerve activity was examined by power spectra analysis of heart rate variability. In psychological tests, factors related to tension (-14.5%, 95% CI=-15.7--2.1), anger (-11.3%, 95% CI=-13.9--0.7), and emotional stress (-28.5%, 95% CI=-30.0--5.3) were significantly decreased by exposure to titanium. The serum level of adrenocorticotropin was gradually elevated throughout the experimental period in the placebo group (day 4, 80.5%, 95% CI=7.1-37.5 vs. before trial) but not the titanium group. Power spectral analysis of R-R interval data showed a significant elevation in the high-frequency power spectral ratio in subjects housed in titanium rooms (days 1-2, 14.3%, 95% CI=4.7-21.9; days 3-4, 26.8%, 95% CI=4.9-38.7; and days 5-6, 24.1%, 95% CI=5.8-34.0 vs. before trial). These results suggest that sleeping in a room containing titanium lowers physiological and psychological stress.
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Li X, Feng YF, Wang CT, Li GC, Lei W, Zhang ZY, Wang L. Evaluation of biological properties of electron beam melted Ti6Al4V implant with biomimetic coating in vitro and in vivo. PLoS One 2012; 7:e52049. [PMID: 23272208 PMCID: PMC3525565 DOI: 10.1371/journal.pone.0052049] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2012] [Accepted: 11/08/2012] [Indexed: 11/26/2022] Open
Abstract
Background High strength porous titanium implants are widely used for the reconstruction of craniofacial defects because of their similar mechanical properties to those of bone. The recent introduction of electron beam melting (EBM) technique allows a direct digitally enabled fabrication of patient specific porous titanium implants, whereas both their in vitro and in vivo biological performance need further investigation. Methods In the present study, we fabricated porous Ti6Al4V implants with controlled porous structure by EBM process, analyzed their mechanical properties, and conducted the surface modification with biomimetic approach. The bioactivities of EBM porous titanium in vitro and in vivo were evaluated between implants with and without biomimetic apatite coating. Results The physical property of the porous implants, containing the compressive strength being 163 - 286 MPa and the Young’s modulus being 14.5–38.5 GPa, is similar to cortical bone. The in vitro culture of osteoblasts on the porous Ti6Al4V implants has shown a favorable circumstance for cell attachment and proliferation as well as cell morphology and spreading, which were comparable with the implants coating with bone-like apatite. In vivo, histological analysis has obtained a rapid ingrowth of bone tissue from calvarial margins toward the center of bone defect in 12 weeks. We observed similar increasing rate of bone ingrowth and percentage of bone formation within coated and uncoated implants, all of which achieved a successful bridging of the defect in 12 weeks after the implantation. Conclusions This study demonstrated that the EBM porous Ti6Al4V implant not only reduced the stress-shielding but also exerted appropriate osteoconductive properties, as well as the apatite coated group. The results opened up the possibility of using purely porous titanium alloy scaffolds to reconstruct specific bone defects in the maxillofacial and orthopedic fields.
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Affiliation(s)
- Xiang Li
- School of Mechanical Engineering, Shanghai Jiao Tong University, State Key Laboratory of Mechanical System and Vibration, Shanghai, China
| | - Ya-Fei Feng
- Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi’an, China
| | - Cheng-Tao Wang
- School of Mechanical Engineering, Shanghai Jiao Tong University, State Key Laboratory of Mechanical System and Vibration, Shanghai, China
| | - Guo-Chen Li
- Department of Orthopaedics, Tangdu Hospital, The Fourth Military Medical University, Xi’an China
| | - Wei Lei
- Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi’an, China
| | - Zhi-Yong Zhang
- Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi’an, China
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People’s Hospital, Shanghai Key Laboratory of Tissue Engineering, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
- * E-mail: (LW); (ZYZ)
| | - Lin Wang
- Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi’an, China
- * E-mail: (LW); (ZYZ)
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Dezfuli SN, Sadrnezhaad SK, Shokrgozar MA, Bonakdar S. Fabrication of biocompatible titanium scaffolds using space holder technique. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:2483-2488. [PMID: 22736051 DOI: 10.1007/s10856-012-4706-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2012] [Accepted: 06/13/2012] [Indexed: 06/01/2023]
Abstract
Open-pore titanium scaffolds were fabricated by sintering of compressed mixtures of TiH(1.924) and urea. Spherical and irregular shaped space holders were used to investigate the effect of pore shape on cellular behavior. After removal of the space holder, the shape of the spacers was replicated to the pores. Average diameter of the pores was in the range of 300-600 μm. SEM images showed that titanium hydride resulted in higher surface roughness and larger micro porosities than pure titanium. In vitro evaluations were carried out by using MTT assay, measuring alkaline phosphatase activity and alizarin red staining in flow perfusion bioreactor for cell culture. Observations revealed excellent attachment and proliferation of G-292 cells to the highly porous scaffolds fabricated with titanium hydride and urea of this research.
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Affiliation(s)
- S Naddaf Dezfuli
- Department of Materials Science and Engineering, Sharif University of Technology, PO Box 11365-9466, Tehran, Iran
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