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Dorozhkin SV. There Are over 60 Ways to Produce Biocompatible Calcium Orthophosphate (CaPO4) Deposits on Various Substrates. JOURNAL OF COMPOSITES SCIENCE 2023; 7:273. [DOI: 10.3390/jcs7070273] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
A The present overview describes various production techniques for biocompatible calcium orthophosphate (abbreviated as CaPO4) deposits (coatings, films and layers) on the surfaces of various types of substrates to impart the biocompatible properties for artificial bone grafts. Since, after being implanted, the grafts always interact with the surrounding biological tissues at the interfaces, their surface properties are considered critical to clinical success. Due to the limited number of materials that can be tolerated in vivo, a new specialty of surface engineering has been developed to desirably modify any unacceptable material surface characteristics while maintaining the useful bulk performance. In 1975, the development of this approach led to the emergence of a special class of artificial bone grafts, in which various mechanically stable (and thus suitable for load-bearing applications) implantable biomaterials and artificial devices were coated with CaPO4. Since then, more than 7500 papers have been published on this subject and more than 500 new publications are added annually. In this review, a comprehensive analysis of the available literature has been performed with the main goal of finding as many deposition techniques as possible and more than 60 methods (double that if all known modifications are counted) for producing CaPO4 deposits on various substrates have been systematically described. Thus, besides the introduction, general knowledge and terminology, this review consists of two unequal parts. The first (bigger) part is a comprehensive summary of the known CaPO4 deposition techniques both currently used and discontinued/underdeveloped ones with brief descriptions of their major physical and chemical principles coupled with the key process parameters (when possible) to inform readers of their existence and remind them of the unused ones. The second (smaller) part includes fleeting essays on the most important properties and current biomedical applications of the CaPO4 deposits with an indication of possible future developments.
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Affiliation(s)
- Sergey V. Dorozhkin
- Faculty of Physics, M.V. Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow 119991, Russia
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2
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Sauro S, Spagnuolo G, Del Giudice C, Neto DMA, Fechine PBA, Chen X, Rengo S, Chen X, Feitosa VP. Chemical, structural and cytotoxicity characterisation of experimental fluoride-doped calcium phosphates as promising remineralising materials for dental applications. Dent Mater 2023; 39:391-401. [PMID: 36907820 DOI: 10.1016/j.dental.2023.03.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 02/14/2023] [Accepted: 03/03/2023] [Indexed: 03/12/2023]
Abstract
OBJECTIVES This study aimed at evaluating the cytotoxicity, chemical and structural properties of experimental fluoride-doped calcium-phosphates as potential remineralising materials for dental applications. METHODS Experimental calcium phosphates were formulated using β-tricalcium phosphate, monocalcium phosphate monohydrate, calcium hydroxide, and different concentrations of calcium/sodium fluoride salts [(5 wt%: VSG5F), (10 wt%: VSG10F), (20 wt%: VSG20F)]. A fluoride-free calcium phosphate (VSG) was used as control. Each tested material was immersed in simulated body fluid (SBF), (24 h, 15 and 30 days) to assess their ability to crystallise into apatite-like. Cumulative fluoride release was assayed up to 45 days. Moreover, each powder was placed into a medium containing human dental pulp stem cells (200 mg/mL) and their cytotoxicity was analysed using the 3-(4,5-dimethylthiazol-2-yl)- 2,5-diphenyltetrazolium bromide (MTT) assay (24 h, 48 h and 72 h incubation). These latter results were statistically analysed by ANOVA and Tukey's test (α = 0.05). RESULTS All the experimental VSG-F materials produced fluoride-containing apatite-like crystals after SBF immersion. VSG20F presented prolonged release of fluoride ions into the storage media (45d). VSG, VSG10F and VSG20F showed a significant cytotoxicity at dilution of 1:1, while at 1:5, only VSG and VSG20F demonstrated a reduction in cell viability. At lower dilutions (1:10, 1:50 and 1:100) all specimens showed no significant toxicity to hDPSCs, but an increase in cell proliferation. SIGNIFICANCE The experimental fluoride-doped calcium-phosphates are biocompatible and possess a clear ability to evoke fluoride-containing apatite-like crystallisation. Hence, they may be promising remineralising materials for dental applications.
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Affiliation(s)
- Salvatore Sauro
- Dental Biomaterials & Minimally Invasive Dentistry, Departamento de Odontologia, CEU Cardenal Herrera University, Alfara del Patriarca, Valencia, Spain.
| | - Gianrico Spagnuolo
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, University of Naples "Federico II", 80131 Naples, Italy
| | - Carmela Del Giudice
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, University of Naples "Federico II", 80131 Naples, Italy
| | - Davino M Andrade Neto
- Federal Institute of Education, Science, and Technology of Ceará, Campus Camocim, 62400-000 Camocim, CE, Brazil
| | - Pierre B A Fechine
- Grupo de Química de Materiais Avançados (GQMat) - Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará (UFC), Campus do Pici, CP 12100, Fortaleza CE 60451-970, Brazil
| | - Xiaohui Chen
- Division of Dentistry, School of Medical Sciences, The University of Manchester, Manchester, UK
| | - Sandro Rengo
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, University of Naples "Federico II", 80131 Naples, Italy
| | - Xiaojing Chen
- Xiangya School of Stomatology and Hospital, Central South University, Changsha 410008, Hunan, China; Hunan Key Laboratory of Oral Health Research, Central South University, Changsha, 410008, Hunan, China; Institute of Dentistry, Dental Physical Sciences Unit, Queen Mary University of London, London, United Kingdom
| | - Victor P Feitosa
- Research Division, Paulo Picanço School of Dentistry, 900 Joaquim Sá St., Fortaleza 60135-218, Ceará, Brazil
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Visible-Light-Enhanced Antibacterial Activity of Silver and Copper Co-Doped Titania Formed on Titanium via Chemical and Thermal Treatments. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020650. [PMID: 36677708 PMCID: PMC9866272 DOI: 10.3390/molecules28020650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 01/06/2023] [Accepted: 01/06/2023] [Indexed: 01/11/2023]
Abstract
Dental implants made of titanium (Ti) are used in dentistry, but peri-implantitis is a serious associated problem. Antibacterial and osteoconductive Ti dental implants may decrease the risk of peri-implantitis. In this study, titania (TiO2) co-doped with silver (Ag) at 2.5 at.% and copper (Cu) at 4.9 at.% was formed on Ti substrates via chemical and thermal treatments. The Ag and Cu co-doped TiO2 formed apatite in a simulated body fluid, which suggests osteoconductivity. It also showed antibacterial activity against Escherichia coli, which was enhanced by visible-light irradiation. This enhancement might be caused by the synergistic effect of the release of Ag and Cu and the generation of •OH from the sample. Dental implants with such a Ag and Cu co-doped TiO2 formed on their surface may reduce the risk of peri-implantitis.
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On-Growth and In-Growth Osseointegration Enhancement in PM Porous Ti-Scaffolds by Two Different Bioactivation Strategies: Alkali Thermochemical Treatment and RGD Peptide Coating. Int J Mol Sci 2022; 23:ijms23031750. [PMID: 35163682 PMCID: PMC8835960 DOI: 10.3390/ijms23031750] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 01/25/2022] [Accepted: 01/30/2022] [Indexed: 02/01/2023] Open
Abstract
A lack of primary stability and osteointegration in metallic implants may result in implant loosening and failure. Adding porosity to metallic implants reduces the stress shielding effect and improves implant performance, allowing the surrounding bone tissue to grow into the scaffold. However, a bioactive surface is needed to stimulate implant osteointegration and improve mechanical stability. In this study, porous titanium implants were produced via powder sintering to create different porous diameters and open interconnectivity. Two strategies were used to generate a bioactive surface on the metallic foams: (1) an inorganic alkali thermochemical treatment, (2) grafting a cell adhesive tripeptide (RGD). RGD peptides exhibit an affinity for integrins expressed by osteoblasts, and have been reported to improve osteoblast adhesion, whereas the thermochemical treatment is known to improve titanium implant osseointegration upon implantation. Bioactivated scaffolds and control samples were implanted into the tibiae of rabbits to analyze the effect of these two strategies in vivo regarding bone tissue regeneration through interconnected porosity. Histomorphometric evaluation was performed at 4 and 12 weeks after implantation. Bone-to-implant contact (BIC) and bone in-growth and on-growth were evaluated in different regions of interest (ROIs) inside and outside the implant. The results of this study show that after a long-term postoperative period, the RGD-coated samples presented higher quantification values of quantified newly formed bone tissue in the implant's outer area. However, the total analyzed bone in-growth was observed to be slightly greater in the scaffolds treated with alkali thermochemical treatment. These results suggest that both strategies contribute to enhancing porous metallic implant stability and osteointegration, and a combination of both strategies might be worth pursuing.
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Ogura A, Yamaguchi S, Le PTM, Yamamoto K, Omori M, Inoue K, Kato-Kogoe N, Nakajima Y, Nakano H, Ueno T, Yamada T, Mori Y. The effect of simple heat treatment on apatite formation on grit-blasted/acid-etched dental Ti implants already in clinical use. J Biomed Mater Res B Appl Biomater 2021; 110:392-402. [PMID: 34323348 DOI: 10.1002/jbm.b.34915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 05/24/2021] [Accepted: 06/27/2021] [Indexed: 11/11/2022]
Abstract
Grit-blasted/acid-etched titanium dental implants have a moderately roughened surface that is suitable for cell adhesion and exhibits faster osseointegration. However, the roughened surface does not always maintain stable fixation over a long period. In this study, a simple heat treatment at 600°C was performed on a commercially available dental Ti implant with grit-blasting/acid-etching, and its effect on mineralization capacity was assessed by examining apatite formation in a simulated body fluid (SBF). The as-purchased implant displayed a moderately roughened surface at the micrometer scale. Its surface was composed of titanium hydride accompanied by a small amount of alumina particles derived from the grit-blasting. Heat treatment transformed the titanium hydride into rutile without evidently changing the surface morphology. The immersion in SBF revealed that apatite formed on the heated implant at 7 days. Furthermore, apatite formed on the Ti rod surface within 1 day when the metal was subjected to acid and heat treatment without blasting. These indicate that apatite formation was conferred on the commercially available dental implant by simple heat treatment, although its induction period was slightly affected by alumina particles remaining on the implant surface. The heat-treated implant should achieve stronger and more stable bone bonding due to its apatite formation.
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Affiliation(s)
- Ayano Ogura
- Department of Dentistry and Oral Surgery, Division of Medicine for Function and Morphology of Sensory Organs, Faculty of Medicine, Osaka Medical College, Takatsuki, Japan.,Section of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Seiji Yamaguchi
- Department of Biomedical Science, College of Life and Health Sciences, Chubu University, Kasugai, Japan
| | - Phuc Thi Minh Le
- Department of Biomedical Science, College of Life and Health Sciences, Chubu University, Kasugai, Japan.,Institute of Biotechnology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Kayoko Yamamoto
- Department of Dentistry and Oral Surgery, Division of Medicine for Function and Morphology of Sensory Organs, Faculty of Medicine, Osaka Medical College, Takatsuki, Japan
| | - Michi Omori
- Department of Dentistry and Oral Surgery, Division of Medicine for Function and Morphology of Sensory Organs, Faculty of Medicine, Osaka Medical College, Takatsuki, Japan
| | - Kazuya Inoue
- Department of Dentistry and Oral Surgery, Division of Medicine for Function and Morphology of Sensory Organs, Faculty of Medicine, Osaka Medical College, Takatsuki, Japan
| | - Nahoko Kato-Kogoe
- Department of Dentistry and Oral Surgery, Division of Medicine for Function and Morphology of Sensory Organs, Faculty of Medicine, Osaka Medical College, Takatsuki, Japan
| | - Yoichiro Nakajima
- Department of Dentistry and Oral Surgery, Division of Medicine for Function and Morphology of Sensory Organs, Faculty of Medicine, Osaka Medical College, Takatsuki, Japan
| | - Hiroyuki Nakano
- Department of Dentistry and Oral Surgery, Division of Medicine for Function and Morphology of Sensory Organs, Faculty of Medicine, Osaka Medical College, Takatsuki, Japan
| | - Takaaki Ueno
- Department of Dentistry and Oral Surgery, Division of Medicine for Function and Morphology of Sensory Organs, Faculty of Medicine, Osaka Medical College, Takatsuki, Japan
| | - Tomohiro Yamada
- Section of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Yoshihide Mori
- Section of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
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Sayedain SS, Ekrami A, Badrossamay M. Production and characterization of Ti6Al4V/CaP nanocomposite powder for powder-based additive manufacturing systems. POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2021.03.046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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7
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Mineralization of Titanium Surfaces: Biomimetic Implants. MATERIALS 2021; 14:ma14112879. [PMID: 34072082 PMCID: PMC8198012 DOI: 10.3390/ma14112879] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 05/21/2021] [Accepted: 05/25/2021] [Indexed: 02/06/2023]
Abstract
The surface modification by the formation of apatitic compounds, such as hydroxyapatite, improves biological fixation implants at an early stage after implantation. The structure, which is identical to mineral content of human bone, has the potential to be osteoinductive and/or osteoconductive materials. These calcium phosphates provoke the action of the cell signals that interact with the surface after implantation in order to quickly regenerate bone in contact with dental implants with mineral coating. A new generation of calcium phosphate coatings applied on the titanium surfaces of dental implants using laser, plasma-sprayed, laser-ablation, or electrochemical deposition processes produces that response. However, these modifications produce failures and bad responses in long-term behavior. Calcium phosphates films result in heterogeneous degradation due to the lack of crystallinity of the phosphates with a fast dissolution; conversely, the film presents cracks, which produce fractures in the coating. New thermochemical treatments have been developed to obtain biomimetic surfaces with calcium phosphate compounds that overcome the aforementioned problems. Among them, the chemical modification using biomineralization treatments has been extended to other materials, including composites, bioceramics, biopolymers, peptides, organic molecules, and other metallic materials, showing the potential for growing a calcium phosphate layer under biomimetic conditions.
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8
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Bhaduri SB, Sikder P. Biomaterials for Dental Applications. Biomed Mater 2021. [DOI: 10.1007/978-3-030-49206-9_14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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9
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Zhang X, Lv Y, Fu S, Wu Y, Lu X, Yang L, Liu H, Dong Z. Synthesis, microstructure, anti-corrosion property and biological performances of Mn-incorporated Ca-P/TiO2 composite coating fabricated via micro-arc oxidation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 117:111321. [DOI: 10.1016/j.msec.2020.111321] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 07/11/2020] [Accepted: 07/26/2020] [Indexed: 12/16/2022]
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10
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The Use of Simulated Body Fluid (SBF) for Assessing Materials Bioactivity in the Context of Tissue Engineering: Review and Challenges. Biomimetics (Basel) 2020; 5:biomimetics5040057. [PMID: 33138246 PMCID: PMC7709622 DOI: 10.3390/biomimetics5040057] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 10/22/2020] [Accepted: 10/26/2020] [Indexed: 01/16/2023] Open
Abstract
Some special implantable materials are defined as “bioactive” if they can bond to living bone, forming a tight and chemically-stable interface. This property, which is inherent to some glass compositions, or can be induced by applying appropriate surface treatments on otherwise bio-inert metals, can be evaluated in vitro by immersion studies in simulated body fluid (SBF), mimicking the composition of human plasma. As a result, apatite coating may form on the material surface, and the presence of this bone-like “biomimetic skin” is considered predictive of bone-bonding ability in vivo. This review article summarizes the story and evolution of in vitro bioactivity testing methods using SBF, highlighting the influence of testing parameters (e.g., formulation and circulation of the solution) and material-related parameters (e.g., composition, geometry, texture). Suggestions for future methodological refinements are also provided at the end of the paper.
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11
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Tovani C, Ferreira CR, Simão AMS, Bolean M, Coppeta L, Rosato N, Bottini M, Ciancaglini P, Ramos AP. Characterization of the in Vitro Osteogenic Response to Submicron TiO 2 Particles of Varying Structure and Crystallinity. ACS OMEGA 2020; 5:16491-16501. [PMID: 32685813 PMCID: PMC7364638 DOI: 10.1021/acsomega.0c00900] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 05/13/2020] [Indexed: 06/11/2023]
Abstract
Titanium oxide (TiO2) nano-/microparticles have been widely used in orthopedic and dental sciences because of their excellent mechanical properties, chemical stability, and ability to promote the osseointegration of implants. However, how the structure and crystallinity of TiO2 particles may affect their osteogenic activity remains elusive. Herein, we evaluated the osteogenic response to submicron amorphous, anatase, and rutile TiO2 particles with controlled size and morphology. First, the ability of TiO2 particles to precipitate apatite was assessed in an acellular medium by using a simulated body fluid (SBF). Three days after the addition to SBF, anatase and rutile TiO2 particles induced the precipitation of aggregates of nanoparticles with a platelike morphology, typical for biomimetic apatite. Conversely, amorphous TiO2 particles induced the precipitation of particles with poor Ca/P atomic ratio only after 14 days of exposure to SBF. Next, the osteogenic response to TiO2 particles was assessed in vitro by incubating MC3T3-E1 preosteoblasts with the particles. The viability and mineralization efficiency of osteoblastic cells were maintained in the presence of all the tested TiO2 particles despite the differences in the induction of apatite precipitation in SBF by TiO2 particles with different structures. Analysis of the particles' surface charge and of the proteins adsorbed onto the particles from the culture media suggested that all the tested TiO2 particles acquired a similar biological identity in the culture media. We posited that this phenomenon attenuated potential differences in osteoblast response to amorphous, anatase, and rutile particles. Our study provides an important insight into the complex relationship between the physicochemical properties and function of TiO2 particles and sheds light on their safe use in medicine.
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Affiliation(s)
- Camila
B. Tovani
- Faculdade
de Filosofia, Ciências e Letras de Ribeirão Preto—Departamento
de Química, Universidade de SãoPaulo, Ribeirão Preto 14040-901, Brazil
| | - Claudio R. Ferreira
- Faculdade
de Filosofia, Ciências e Letras de Ribeirão Preto—Departamento
de Química, Universidade de SãoPaulo, Ribeirão Preto 14040-901, Brazil
| | - Ana Maria S. Simão
- Faculdade
de Filosofia, Ciências e Letras de Ribeirão Preto—Departamento
de Química, Universidade de SãoPaulo, Ribeirão Preto 14040-901, Brazil
| | - Maytê Bolean
- Faculdade
de Filosofia, Ciências e Letras de Ribeirão Preto—Departamento
de Química, Universidade de SãoPaulo, Ribeirão Preto 14040-901, Brazil
| | - Luca Coppeta
- Department
of Occupational Medicine, University of
Rome Tor Vergata, Rome 00133, Italy
| | - Nicola Rosato
- Department
of Experimental Medicine, University of
Rome Tor Vergata, Rome 00133, Italy
| | - Massimo Bottini
- Department
of Experimental Medicine, University of
Rome Tor Vergata, Rome 00133, Italy
- Sanford
Burnham Prebys Medical Discovery Institute, La Jolla, California 92037, United States
| | - Pietro Ciancaglini
- Faculdade
de Filosofia, Ciências e Letras de Ribeirão Preto—Departamento
de Química, Universidade de SãoPaulo, Ribeirão Preto 14040-901, Brazil
| | - Ana Paula Ramos
- Faculdade
de Filosofia, Ciências e Letras de Ribeirão Preto—Departamento
de Química, Universidade de SãoPaulo, Ribeirão Preto 14040-901, Brazil
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Abstract
The topic of titanium alloys for dental implants has been reviewed. The basis of the review was a search using PubMed, with the large number of references identified being reduced to a manageable number by concentrating on more recent articles and reports of biocompatibility and of implant durability. Implants made mainly from titanium have been used for the fabrication of dental implants since around 1981. The main alloys are so-called commercially pure titanium (cpTi) and Ti-6Al-4V, both of which give clinical success rates of up to 99% at 10 years. Both alloys are biocompatible in contact with bone and the gingival tissues, and are capable of undergoing osseointegration. Investigations of novel titanium alloys developed for orthopaedics show that they offer few advantages as dental implants. The main findings of this review are that the alloys cpTi and Ti-6Al-4V are highly satisfactory materials, and that there is little scope for improvement as far as dentistry is concerned. The conclusion is that these materials will continue to be used for dental implants well into the foreseeable future.
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Rajendran A, Pattanayak DK. Mechanistic studies of biomineralisation on silver incorporated anatase TiO 2. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 109:110558. [PMID: 32228955 DOI: 10.1016/j.msec.2019.110558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 11/17/2019] [Accepted: 12/13/2019] [Indexed: 11/25/2022]
Abstract
Here we report silver incorporated anatase TiO2 developed on Ti metal by H2O2-AgNO3 and heat treatment to have faster biomineralisation or apatite-forming ability in simulated body fluid (SBF). Apatite-forming ability has been investigated concerning heat treatment temperatures ranges, 400-800 °C and duration of soaking period in SBF. The apatite formation showed an increasing trend with increase in the heat treatment temperatures up to 600 °C and beyond that the Ti metal lost this ability. XRD as wells as Raman results of such chemical and heat-treated Ti metal at different temperatures further correlates the apatite nucleation directly in relation with that of anatase to rutile TiO2 formation. Further, a time dependent apatite mineralisation study by XPS revealed simultaneous calcium and phosphate deposition at the early stage of soaking in SBF. Therefore, the apatite nucleation in the present chemically treated Ti metal depends on the crystalline phase of TiO2 formed by H2O2 and heat treatment along with Ag+ ion release.
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Affiliation(s)
- Archana Rajendran
- CSIR-Central Electrochemical Research Institute, Karaikudi, Tamil Nadu 630006, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Deepak K Pattanayak
- CSIR-Central Electrochemical Research Institute, Karaikudi, Tamil Nadu 630006, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
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14
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Formation and in vitro mineralization of electrochemically deposited coatings prepared on micro-arc oxidized titanium alloy. J APPL ELECTROCHEM 2019. [DOI: 10.1007/s10800-019-01293-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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15
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Milleret V, Lienemann PS, Gasser A, Bauer S, Ehrbar M, Wennerberg A. Rational design and in vitro characterization of novel dental implant and abutment surfaces for balancing clinical and biological needs. Clin Implant Dent Relat Res 2019; 21 Suppl 1:15-24. [DOI: 10.1111/cid.12736] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 01/23/2019] [Accepted: 01/29/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Vincent Milleret
- Laboratory for Cell and Tissue Engineering, Department of Obstetrics, University Hospital ZurichUniversity of Zurich Zurich Switzerland
| | - Philipp S. Lienemann
- Product Development Regeneratives & BiologicsNobel Biocare AG Kloten Switzerland
| | - Angelines Gasser
- Product Development Regeneratives & BiologicsNobel Biocare AG Kloten Switzerland
| | - Sebastian Bauer
- Material Research and Surface TechnologiesNobel Biocare AG Kloten Switzerland
| | - Martin Ehrbar
- Laboratory for Cell and Tissue Engineering, Department of Obstetrics, University Hospital ZurichUniversity of Zurich Zurich Switzerland
| | - Ann Wennerberg
- Department of Prosthodontics, Institute of Odontology, Sahlgrenska AcademyUniversity of Gothenburg Göteborg Sweden
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16
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Rajendran A, Sugunapriyadharshini S, Mishra D, Pattanayak DK. Role of calcium ions in defining the bioactivity of surface modified Ti metal. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 98:197-204. [PMID: 30813020 DOI: 10.1016/j.msec.2018.12.096] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 12/03/2018] [Accepted: 12/25/2018] [Indexed: 11/25/2022]
Abstract
Nano-structured hydrogen titanate and sodium hydrogen titanate layers were formed when Ti metal was treated with H2O2 and NaOH solutions, respectively. The chemically treated Ti metals upon subsequent treatment with Ca(NO3)2 and CaCl2 solutions, resulted in incorporation of Ca2+ ions into the nano-structured titanate layer. Thus formed nano-structured titanate layers containing Ca2+ ions when subjected to heat treatment, forms anatase and calcium titanate-rutile phases, respectively. In vitro apatite-forming ability in simulated body fluid (SBF) was positive for H2O2-Ca and heat-treated Ti metal in contrast to NaOH-Ca and heat treatment. Formation of anatase phase together with Ca2+ ion release into SBF was found to be the key driving force for such a high bioactivity of Ca2+ containing H2O2 treated Ti metal on contrary to NaOH and heat treatment. This study provides a new insight into the factors accelerating the bioactivity of Ti metals during various chemical and thermal treatments, which further aid and abet to design dental and orthopaedic implants with high bone-bonding ability.
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Affiliation(s)
- Archana Rajendran
- CSIR-Central Electrochemical Research Institute, Karaikudi, Tamil Nadu 630006, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - S Sugunapriyadharshini
- School of Biosciences & Technology, Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India
| | - Debasish Mishra
- School of Biosciences & Technology, Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India
| | - Deepak K Pattanayak
- CSIR-Central Electrochemical Research Institute, Karaikudi, Tamil Nadu 630006, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
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Ortiz-Hernandez M, Rappe KS, Molmeneu M, Mas-Moruno C, Guillem-Marti J, Punset M, Caparros C, Calero J, Franch J, Fernandez-Fairen M, Gil J. Two Different Strategies to Enhance Osseointegration in Porous Titanium: Inorganic Thermo-Chemical Treatment Versus Organic Coating by Peptide Adsorption. Int J Mol Sci 2018; 19:ijms19092574. [PMID: 30200178 PMCID: PMC6163352 DOI: 10.3390/ijms19092574] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2018] [Revised: 08/08/2018] [Accepted: 08/25/2018] [Indexed: 01/24/2023] Open
Abstract
In this study, highly-interconnected porous titanium implants were produced by powder sintering with different porous diameters and open interconnectivity. The actual foams were produced using high cost technologies: Chemical Vapor Deposition (CVD), Physical Vapor Deposition (PVD), and spark plasma sintering, and the porosity and/or interconnection was not optimized. The aim was to generate a bioactive surface on foams using two different strategies, based on inorganic thermo-chemical treatment and organic coating by peptide adsorption, to enhance osseointegration. Porosity was produced using NaCl as a space holder and polyethyleneglicol as a binder phase. Static and fatigue tests were performed in order to determine mechanical behaviors. Surface bioactivation was performed using a thermo-chemical treatment or by chemical adsorption with peptides. Osteoblast-like cells were cultured and cytotoxicity was measured. Bioactivated scaffolds and a control were implanted in the tibiae of rabbits. Histomorphometric evaluation was performed at 4 weeks after implantation. Interconnected porosity was 53% with an average diameter of 210 µm and an elastic modulus of around 1 GPa with good mechanical properties. The samples presented cell survival values close to 100% of viability. Newly formed bone was observed inside macropores, through interconnected porosity, and on the implant surface. Successful bone colonization of inner structure (40%) suggested good osteoconductive capability of the implant. Bioactivated foams showed better results than non-treated ones, suggesting both bioactivation strategies induce osteointegration capability.
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Affiliation(s)
- Monica Ortiz-Hernandez
- Biomaterials, Biomechanics and Tissue Engineering Group (BBT), Department of Materials Science and Metallurgical Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain.
- Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain.
| | - Katrin S Rappe
- Departamento de Cirugía Animal, Facultad de Veterinaria, Universidad Autónoma de Barcelona, Bellaterra, 08193 Barcelona, Spain.
| | - Meritxell Molmeneu
- Biomaterials, Biomechanics and Tissue Engineering Group (BBT), Department of Materials Science and Metallurgical Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain.
- Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain.
| | - Carles Mas-Moruno
- Biomaterials, Biomechanics and Tissue Engineering Group (BBT), Department of Materials Science and Metallurgical Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain.
- Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain.
| | - Jordi Guillem-Marti
- Biomaterials, Biomechanics and Tissue Engineering Group (BBT), Department of Materials Science and Metallurgical Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain.
- Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain.
| | - Miquel Punset
- Biomaterials, Biomechanics and Tissue Engineering Group (BBT), Department of Materials Science and Metallurgical Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain.
- Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain.
| | - Cristina Caparros
- Biomaterials, Biomechanics and Tissue Engineering Group (BBT), Department of Materials Science and Metallurgical Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain.
- Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain.
| | - Jose Calero
- Biomaterials, Biomechanics and Tissue Engineering Group (BBT), Department of Materials Science and Metallurgical Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain.
| | - Jordi Franch
- Departamento de Cirugía Animal, Facultad de Veterinaria, Universidad Autónoma de Barcelona, Bellaterra, 08193 Barcelona, Spain.
| | - Mariano Fernandez-Fairen
- Facultad de Odontología, Campus de Medicina y Ciencias de la Salud, Universidad Internacional de Cataluña (UIC), 08017 Barcelona, Spain.
| | - Javier Gil
- Facultad de Odontología, Campus de Medicina y Ciencias de la Salud, Universidad Internacional de Cataluña (UIC), 08017 Barcelona, Spain.
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18
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Divakarla SK, Yamaguchi S, Kokubo T, Han DW, Lee JH, Chrzanowski W. Improved bioactivity of GUMMETAL ®, Ti 59Nb 36Ta 2Zr 3O 0.3, via formation of nanostructured surfaces. J Tissue Eng 2018; 9:2041731418774178. [PMID: 29796242 PMCID: PMC5956631 DOI: 10.1177/2041731418774178] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 04/09/2018] [Indexed: 11/26/2022] Open
Abstract
The leading reason for implant revision surgery globally is lack of implant integration with surrounding bone. A new titanium alloy GUMMETAL® (Ti59Nb36Ta2Zr3O0.3) is currently used in biomedical devices and has a Young’s modulus that is better matched to bone. The surface was subject to NaOH, CaCl2, heat and water treatment (BioGum) after which the surfaces were evaluated using atomic force microscope, scanning electron microscope, X-ray diffractometer and elemental analysis using energy dispersive X-ray. To demonstrate enhanced bone bonding ability and cytocompatibility, apatite formation in simulated body fluid and in vitro stem cell attachment, proliferation and cytoskeleton organisation were examined. The formation of a ~200 nm nanoscale needle-like calcium titanate network on the surface following treatment was revealed and upon soaking in simulated body fluid, the formation of a ~5 µm layer of apatite. Metabolic activity of rat bone marrow stem cells on BioGum was increased in comparison to control and the cell number appeared greater, with more elongated morphology as early as 2 h post-seeding. This positions the modification as a simple and potentially universal technology for the improvement of implant integration.
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Affiliation(s)
- Shiva Kamini Divakarla
- Faculty of Pharmacy, The University of Sydney, Sydney, NSW, Australia.,The University of Sydney Nano Institute, Sydney, NSW, Australia
| | - Seiji Yamaguchi
- Department of Biomedical Sciences, College of Life and Health Sciences, Chubu University, Kasugai, Japan
| | - Tadashi Kokubo
- Department of Biomedical Sciences, College of Life and Health Sciences, Chubu University, Kasugai, Japan
| | - Dong-Wook Han
- Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan, Korea
| | - Jae Ho Lee
- CHA Fertility Center, Seoul Station, Seoul, Republic of Korea.,Department of Biomedical Science, College of Life Science, CHA University, Pochen, Republic of Korea
| | - Wojciech Chrzanowski
- Faculty of Pharmacy, The University of Sydney, Sydney, NSW, Australia.,The University of Sydney Nano Institute, Sydney, NSW, Australia
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19
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Yabutsuka T, Fukushima K, Hiruta T, Takai S, Yao T. Effect of pores formation process and oxygen plasma treatment to hydroxyapatite formation on bioactive PEEK prepared by incorporation of precursor of apatite. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 81:349-358. [DOI: 10.1016/j.msec.2017.07.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2017] [Revised: 06/08/2017] [Accepted: 07/13/2017] [Indexed: 11/28/2022]
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20
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Guo Y, Tan Y, Liu Y, Liu S, Zhou R, Tang H. Low modulus and bioactive Ti/α-TCP/Ti-mesh composite prepared by spark plasma sintering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 80:197-206. [DOI: 10.1016/j.msec.2017.05.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 04/24/2017] [Accepted: 05/04/2017] [Indexed: 11/30/2022]
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21
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Surface characteristics of bioactive Ti fabricated by chemical treatment for cartilaginous-integration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 78:495-502. [DOI: 10.1016/j.msec.2017.03.250] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 03/23/2017] [Accepted: 03/26/2017] [Indexed: 12/23/2022]
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22
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Hsu HC, Wu SC, Hsu SK, Liao YH, Ho WF. Effect of different post-treatments on the bioactivity of alkali-treated Ti–5Si alloy. Biomed Mater Eng 2017; 28:503-514. [DOI: 10.3233/bme-171693] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Hsueh-Chuan Hsu
- Department of Dental Technology and Materials Science, Central Taiwan University of Science and Technology, Taiwan, ROC
| | - Shih-Ching Wu
- Department of Dental Technology and Materials Science, Central Taiwan University of Science and Technology, Taiwan, ROC
| | - Shih-Kuang Hsu
- Department of Dental Technology and Materials Science, Central Taiwan University of Science and Technology, Taiwan, ROC
| | - Yi-Hang Liao
- Department of Materials Science and Engineering, Da-Yeh University, Taiwan, ROC
| | - Wen-Fu Ho
- Department of Chemical and Materials Engineering, National University of Kaohsiung, Kaohsiung 81148, Taiwan, ROC. E-mail:
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23
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Two-in-One Biointerfaces-Antimicrobial and Bioactive Nanoporous Gallium Titanate Layers for Titanium Implants. NANOMATERIALS 2017; 7:nano7080229. [PMID: 28825641 PMCID: PMC5575711 DOI: 10.3390/nano7080229] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 08/11/2017] [Accepted: 08/12/2017] [Indexed: 01/22/2023]
Abstract
The inhibitory effect of gallium (Ga) ions on bone resorption and their superior microbial activity are attractive and sought-after features for the vast majority of implantable devices, in particular for implants used for hard tissue. In our work, for the first time, Ga ions were successfully incorporated into the surface of titanium metal (Ti) by simple and cost-effective chemical and heat treatments. Ti samples were initially treated in NaOH solution to produce a nanostructured sodium hydrogen titanate layer approximately 1 μm thick. When the metal was subsequently soaked in a mixed solution of CaCl2 and GaCl3, its Na ions were replaced with Ca and Ga ions in a Ga/Ca ratio range of 0.09 to 2.33. 8.0% of the Ga ions were incorporated into the metal surface when the metal was soaked in a single solution of GaCl3 after the NaOH treatment. The metal was then heat-treated at 600 °C to form Ga-containing calcium titanate (Ga–CT) or gallium titanate (GT), anatase and rutile on its surface. The metal with Ga–CT formed bone-like apatite in a simulated body fluid (SBF) within 3 days, but released only 0.23 ppm of the Ga ions in a phosphate-buffered saline (PBS) over a period of 14 days. In contrast, Ti with GT did not form apatite in SBF, but released 2.96 ppm of Ga ions in PBS. Subsequent soaking in hot water at 80 °C dramatically enhanced apatite formation of the metal by increasing the release of Ga ions up to 3.75 ppm. The treated metal exhibited very high antibacterial activity against multidrug resistant Acinetobacter baumannii (MRAB12). Unlike other antimicrobial coating on titanium implants, Ga–CT and GT interfaces were shown to have a unique combination of antimicrobial and bioactive properties. Such dual activity is essential for the next generation of orthopaedic and dental implants. The goal of combining both functions without inducing cytotoxicity is a major advance and has far reaching translational perspectives. This unique dual-function biointerfaces will inhibit bone resorption and show antimicrobial activity through the release of Ga ions, while tight bonding to the bone will be achieved through the apatite formed on the surface.
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24
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Hilario F, Roche V, Nogueira RP, Junior AMJ. Influence of morphology and crystalline structure of TiO2 nanotubes on their electrochemical properties and apatite-forming ability. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.05.160] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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25
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Effect of surface alkali-based treatment of titanium implants on ability to promote in vitro mineralization and in vivo bone formation. Acta Biomater 2017; 57:511-523. [PMID: 28499630 DOI: 10.1016/j.actbio.2017.05.016] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2016] [Revised: 05/02/2017] [Accepted: 05/08/2017] [Indexed: 12/29/2022]
Abstract
This study investigated whether a novel alkali-based surface modification enhances in vitro mineralization as well as in vivo bone formation around titanium (Ti) implants in a femoral condyle model of 36 male Wister rats. All implant surfaces were grit-blasted and then received either acid-etching treatment, alkali-based treatment, or were left untreated (controls). Histological and histomorphometrical analyses were performed on retrieved specimens after 4 and 8weeks of healing to assess peri-implant bone formation. Results of implants surface characterisation showed notable differences in the topography and composition of alkali-treated surfaces, reflecting the formation of submicron-structured alkali-titanate layer. In the in vitro test, alkali-treated Ti surfaces showed the ability to stimulate mineralization upon soaking in simulated body fluid (SBF). In vivo histomorphometrical analyses showed similar values for bone area (BA%) and bone-to-implant contact (BIC%) for all experimental groups after both 4- and 8-week implantation periods. In conclusion, the surface topography and composition of the grit-blasted Ti implants was significantly modified using alkali-based treatment. With respect to the present in vivo model, the biological performance of alkali-treated Ti implants is comparable to the commercially available, grit-blasted, acid-etched Ti implants. STATEMENT OF SIGNIFICANCE Since success rate of dental implants might be challenged in bone of low density, an optimum implant surface characteristic is demanding. In this work, alkali treatment of Ti implants showed significant advantage of surface mineralization upon soaking in simulated body fluid. Using an in vivo rat model, Ti surfaces with either acid-etching treatment or alkali-based treatment evoked robust bone formation around Ti implants. Such information may be utilized for the advancement of biomaterials research for bone implants in future.
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26
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Bock RM, Marin E, Rondinella A, Boschetto F, Adachi T, McEntire BJ, Bal BS, Pezzotti G. Development of a SiYAlON glaze for improved osteoconductivity of implantable medical devices. J Biomed Mater Res B Appl Biomater 2017; 106:1084-1096. [PMID: 28503805 DOI: 10.1002/jbm.b.33914] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 04/11/2017] [Accepted: 04/22/2017] [Indexed: 12/20/2022]
Abstract
The application of bioactive coatings onto orthopaedic appliances is commonly performed to compensate for the otherwise bioinert nature of medical devices and to improve their osseointegration. Calcium phosphates, hydroxyapatite (HAp), and bioglasses are commercially available for this purpose. Until recently, few other inorganic compounds have been identified with similar biofunctionality. However, silicon nitride (Si3 N4 ) has emerged as a new orthopaedic material whose unique surface chemistry also enhances osteoconductivity. Recent research has confirmed that its minority intergranular phase, consisting of silicon yttrium aluminum oxynitride (SiYAlON), is principally responsible for this improvement. As a result, it was hypothesized that SiYAlON itself might serve as an effective osteoconductive coating or glaze for medical devices. To test this hypothesis, a process inspired by traditional ceramic whiteware glazing was developed. A slurry containing ingredients similar to the intergranular SiYAlON composition was applied to a Si3 N4 surface, which was then subjected to a heat treatment to form a glaze. Various analytical tools were employed to assess its chemistry and morphology. It was found that the glaze was comprised predominately of Y5 Si3 O12 N, a compound commonly referred to as N-apatite, which is isostructural to native HAp. Subsequent exposure of the glazed surface to acellular simulated body fluid led to increased deposition of biomimetic HAp-like crystals, while exposure to Saos-2 osteosarcoma cells in vitro resulted in greater HAp deposition relative to control samples. The observation that SiYAlON exhibits enhanced osteoconductivity portends its potential as a therapeutic aid in bone and tissue repair. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 1084-1096, 2018.
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Affiliation(s)
- Ryan M Bock
- Amedica Corporation, Salt Lake City, Utah, 84119
| | - Elia Marin
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, 606-8126, Kyoto, Japan
| | - Alfredo Rondinella
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, 606-8126, Kyoto, Japan.,Department of Dental Medicine, Kyoto Prefectural University of Medicine, Kawaramachi Hirokoji, Kamigyo-ku, 602-8566, Kyoto, Japan
| | - Francesco Boschetto
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, 606-8126, Kyoto, Japan.,Department of Dental Medicine, Kyoto Prefectural University of Medicine, Kawaramachi Hirokoji, Kamigyo-ku, 602-8566, Kyoto, Japan
| | - Tetsuya Adachi
- Department of Dental Medicine, Kyoto Prefectural University of Medicine, Kawaramachi Hirokoji, Kamigyo-ku, 602-8566, Kyoto, Japan.,Department of Immunology, Kyoto Prefectural University of Medicine, Kawaramachi Hirokoji, Kamigyo-ku, 602-8566, Kyoto, Japan
| | | | - B Sonny Bal
- Amedica Corporation, Salt Lake City, Utah, 84119.,Department of Orthopaedic Surgery, University of Missouri, Columbia, Missouri, 65212
| | - Giuseppe Pezzotti
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, 606-8126, Kyoto, Japan
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27
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Syusyukina VA, Shapovalova Y, Korotchenko NM, Kurzina IA. Structural-phase state and surface properties of composite materials based on polylactide and hydroxyapatite. RUSS J APPL CHEM+ 2017. [DOI: 10.1134/s1070427217010165] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Li N, Gilpin CJ, Taylor LS. Understanding the Impact of Water on the Miscibility and Microstructure of Amorphous Solid Dispersions: An AFM-LCR and TEM-EDX Study. Mol Pharm 2017; 14:1691-1705. [PMID: 28394617 DOI: 10.1021/acs.molpharmaceut.6b01151] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Miscibility is critical for amorphous solid dispersions (ASDs). Phase-separated ASDs are more prone to crystallization, and thus can lose their solubility advantage leading to product failure. Additionally, dissolution performance can be diminished as a result of phase separation in the ASD matrix. Water is known to induce phase separation during storage for some ASDs. However, the impact of water introduced during preparation has not been as thoroughly investigated to date. The purpose of this study was to develop a mechanistic understanding of the effect of water on the phase behavior and microstructure of ASDs. Evacetrapib and two polymers were selected as the model system. Atomic force microscopy coupled with Lorentz contact resonance, and transmission electron microscopy with energy dispersive X-ray spectroscopy were employed to evaluate the microstructure and composition of phase-separated ASDs. It was found that phase separation could be induced via two routes: solution-state phase separation during ASD formation caused by water absorption during film formation by a hydrophilic solvent, or solid-phase separation following exposure to high RH during storage. Water contents of as low as 2% in the organic solvent system used to dissolve the drug and polymer were found to result in phase separation in the resultant ASD film. These findings have profound implications on lab-scale ASD preparation and potentially also for industrial production. Additionally, these high-resolution imaging techniques combined with orthogonal analyses are powerful tools to visualize structural changes in ASDs, which in turn will enable better links to be made between ASD structure and performance.
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Affiliation(s)
- Na Li
- Department of Industrial and Physical Pharmacy, Purdue University , 575 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Christopher J Gilpin
- Life Science Microscopy Facility, Purdue University , 625 Agriculture Mall Drive, West Lafayette, Indiana 47907, United States
| | - Lynne S Taylor
- Department of Industrial and Physical Pharmacy, Purdue University , 575 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
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29
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Luo H, Li W, Ao H, Li G, Tu J, Xiong G, Zhu Y, Wan Y. Preparation, structural characterization, and in vitro cell studies of three-dimensional SiO 2-CaO binary glass scaffolds built ofultra-small nanofibers. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 76:94-101. [PMID: 28482610 DOI: 10.1016/j.msec.2017.02.134] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 12/20/2016] [Accepted: 02/24/2017] [Indexed: 12/25/2022]
Abstract
Three-dimensional (3D) nanofibrous scaffolds hold great promises in tissue engineering and regenerative medicine. In this work, for the first time, 3D SiO2-CaO binary glass nanofibrous scaffolds have been fabricated via a combined method of template-assisted sol-gel and calcination by using bacterial cellulose as the template. SEM with EDS, TEM, and AFM confirm that the molar ratio of Ca to Si and fiber diameter of the resultant SiO2-CaO nanofibers can be controlled by immersion time in the solution of tetraethyl orthosilicate and ethanol. The optimal immersion time was 6h which produced the SiO2-CaO binary glass containing 60at.% Si and 40at.% Ca (named 60S40C). The fiber diameter of 60S40C scaffold is as small as 29nm. In addition, the scaffold has highly porous 3D nanostructure with dominant mesopores at 10.6nm and macropores at 20μm as well as a large BET surface area (240.9m2g-1), which endow the 60S40C scaffold excellent biocompatibility and high ALP activity as revealed by cell studies using osteoblast cells. These results suggest that the 60S40C scaffold has great potential in bone tissue regeneration.
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Affiliation(s)
- Honglin Luo
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, China; School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Wei Li
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, China.
| | - Haiyong Ao
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, China
| | - Gen Li
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, China
| | - Junpin Tu
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, China
| | - Guangyao Xiong
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, China
| | - Yong Zhu
- School of Chemical Engineering, Tianjin University, Tianjin 300072, China
| | - Yizao Wan
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, China; School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China.
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30
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Koju N, Sikder P, Ren Y, Zhou H, Bhaduri SB. Biomimetic coating technology for orthopedic implants. Curr Opin Chem Eng 2017. [DOI: 10.1016/j.coche.2016.11.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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31
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Lee HB, Hsu HC, Wu SC, Hsu SK, Wang PH, Ho WF. Microstructure and Characteristics of Calcium Phosphate Layers on Bioactive Oxide Surfaces of Air-Sintered Titanium Foams after Immersion in Simulated Body Fluid. MATERIALS (BASEL, SWITZERLAND) 2016; 9:E956. [PMID: 28774076 PMCID: PMC5456994 DOI: 10.3390/ma9120956] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 11/10/2016] [Accepted: 11/17/2016] [Indexed: 11/20/2022]
Abstract
We propose a simple and low-cost process for the preparation of porous Ti foams through a sponge replication method using single-step air sintering at various temperatures. In this study, the apatite-forming ability of air-sintered Ti samples after 21 days of immersion in simulated body fluid (SBF) was investigated. The microstructures of the prepared Ca-P deposits were examined by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), Fourier transform infrared (FTIR) spectroscopy, and cross-sectional transmission electron microscopy (TEM). In contrast to the control sample sintered in vacuum, which was found to have the simple hexagonal α-Ti phase, the air-sintered samples contained only the rutile phase. High intensities of XRD peaks for rutile TiO₂ were obtained with samples sintered at 1000 °C. Moreover, the air-sintered Ti samples had a greater apatite-forming ability than that of the Ti sample sintered in vacuum. Ti samples sintered at 900 and 1000 °C had large aggregated spheroidal particles on their surfaces after immersion in SBF for 21 days. Combined XRD, energy-dispersive X-ray spectroscopy, FTIR spectroscopy, and TEM results suggest that the calcium phosphate deposited on the rutile TiO₂ surfaces consist of carbonated calcium-deficient hydroxyapatite instead of octacalcium phosphate.
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Affiliation(s)
- Hung-Bin Lee
- Department of Materials Science and Engineering, Da-Yeh University, Changhua 51591, Taiwan.
| | - Hsueh-Chuan Hsu
- Department of Dental Technology and Materials Science, Central Taiwan University of Science and Technology, Taichung 40601, Taiwan.
| | - Shih-Ching Wu
- Department of Dental Technology and Materials Science, Central Taiwan University of Science and Technology, Taichung 40601, Taiwan.
| | - Shih-Kuang Hsu
- Department of Dental Technology and Materials Science, Central Taiwan University of Science and Technology, Taichung 40601, Taiwan.
| | - Peng-Hsiang Wang
- Department of Mechanical and Automation Engineering, Da-Yeh University, Changhua 51591, Taiwan.
| | - Wen-Fu Ho
- Department of Chemical and Materials Engineering, National University of Kaohsiung, Kaohsiung 81148, Taiwan.
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32
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Sailaja GS, Ramesh P, Vellappally S, Anil S, Varma HK. Biomimetic approaches with smart interfaces for bone regeneration. J Biomed Sci 2016; 23:77. [PMID: 27814702 PMCID: PMC5097415 DOI: 10.1186/s12929-016-0284-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Accepted: 09/05/2016] [Indexed: 01/18/2023] Open
Abstract
A 'smart tissue interface' is a host tissue-biomaterial interface capable of triggering favourable biochemical events inspired by stimuli responsive mechanisms. In other words, biomaterial surface is instrumental in dictating the interface functionality. This review aims to investigate the fundamental and favourable requirements of a 'smart tissue interface' that can positively influence the degree of healing and promote bone tissue regeneration. A biomaterial surface when interacts synergistically with the dynamic extracellular matrix, the healing process become accelerated through development of a smart interface. The interface functionality relies equally on bound functional groups and conjugated molecules belonging to the biomaterial and the biological milieu it interacts with. The essential conditions for such a special biomimetic environment are discussed. We highlight the impending prospects of smart interfaces and trying to relate the design approaches as well as critical factors that determine species-specific functionality with special reference to bone tissue regeneration.
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Affiliation(s)
- G S Sailaja
- Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology, Cochin, 682 022, India.
| | - P Ramesh
- Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, 695 012, India
| | - Sajith Vellappally
- Dental Biomaterials Research Chair, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Sukumaran Anil
- Department of Preventive Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Riyadh, Post Box 153, AIKharj 11942, Saudi Arabia
| | - H K Varma
- Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, 695 012, India.
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Kokubo T, Yamaguchi S. Novel bioactive materials developed by simulated body fluid evaluation: Surface-modified Ti metal and its alloys. Acta Biomater 2016; 44:16-30. [PMID: 27521496 DOI: 10.1016/j.actbio.2016.08.013] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 08/01/2016] [Accepted: 08/10/2016] [Indexed: 12/22/2022]
Abstract
UNLABELLED Until the discovery of the bone-bonding activity of Bioglass by Hench et al. in the early 1970s, it had not been demonstrated that a synthetic material could bond to living bone without eliciting a foreign body reaction. Since then, various kinds of materials based on calcium phosphate, such as sintered hydroxyapatite and β-tricalcium phosphate have also been shown to bond to living bone. Until the discovery of the bone-bonding activity of Ti metal formed with a sodium titanate surface layer by the present authors in 1996, it had not been shown that a metallic material could bond to living bone. Since then, various kinds of surface-modified Ti metal and its alloys have been found to bond to living bone. Until the discovery of the osteoinduction of porous hydroxyapatite by Yamasaki in 1990, it was unknown whether a synthetic material could induce bone formation even in muscle tissue. Since then, various kinds of porous calcium phosphate ceramics have been shown to induce osteoinduction. Until the discovery of osteoinduction induced by a porous Ti metal formed with a titanium oxide surface layer by Fujibayashi et al. in 2004, it had been unclear whether porous metals would be able to induce osteoinduction. These novel bioactive materials have been developed by systematic research into the apatite formation that occurs on surface-modified Ti metal and its related materials in an acellular simulated body fluid (SBF) having ion concentrations almost equal to those of human blood plasma. Some of the novel bioactive materials based on Ti metal are already in clinical use or clinical trials, such as artificial hip joints and spinal fusion devices. In the present paper, we review how these novel bioactive materials based on Ti metal have been developed based on an evaluation of apatite formation in SBF. Without the SBF evaluation, these novel bioactive materials would most likely never have been developed. STATEMENT OF SIGNIFICANCE On the basis of systematic study of apatite formation on a material in a simulated body fluid, various kinds of novel bioactive materials possessing not only bone-bonding activity and but also various other functions such as bone growth promotion, antibacterial activity and osteoinduction have been developed. Some of them are already successfully applied to clinical applications or trials for artificial hip joints and spinal fusion devices. It is shown in the present paper how these novel bioactive materials have been developed.
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Affiliation(s)
- Tadashi Kokubo
- Department of Biomedical Sciences, College of Life and Health Sciences, Chubu University, Kasugai, Aichi 487-8901, Japan.
| | - Seiji Yamaguchi
- Department of Biomedical Sciences, College of Life and Health Sciences, Chubu University, Kasugai, Aichi 487-8901, Japan
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Caparrós C, Ortiz-Hernandez M, Molmeneu M, Punset M, Calero JA, Aparicio C, Fernández-Fairén M, Perez R, Gil FJ. Bioactive macroporous titanium implants highly interconnected. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2016; 27:151. [PMID: 27582071 DOI: 10.1007/s10856-016-5764-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Accepted: 08/05/2016] [Indexed: 06/06/2023]
Abstract
Intervertebral implants should be designed with low load requirements, high friction coefficient and low elastic modulus in order to avoid the stress shielding effect on bone. Furthermore, the presence of a highly interconnected porous structure allows stimulating bone in-growth and enhancing implant-bone fixation. The aim of this study was to obtain bioactive porous titanium implants with highly interconnected pores with a total porosity of approximately 57 %. Porous Titanium implants were produced by powder sintering route using the space holder technique with a binder phase and were then evaluated in an in vivo study. The size of the interconnection diameter between the macropores was about 210 μm in order to guarantee bone in-growth through osteblastic cell penetration. Surface roughness and mechanical properties were analyzed. Stiffness was reduced as a result of the powder sintering technique which allowed the formation of a porous network. Compression and fatigue tests exhibited suitable properties in order to guarantee a proper compromise between mechanical properties and pore interconnectivity. Bioactivity treatment effect in novel sintered porous titanium materials was studied by thermo-chemical treatments and were compared with the same material that had undergone different bioactive treatments. Bioactive thermo-chemical treatment was confirmed by the presence of sodium titanates on the surface of the implants as well as inside the porous network. Raman spectroscopy results suggested that the identified titanate structures would enhance in vivo apatite formation by promoting ion exchange for the apatite formation process. In vivo results demonstrated that the bioactive titanium achieved over 75 % tissue colonization compared to the 40 % value for the untreated titanium.
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Affiliation(s)
- Cristina Caparrós
- Biomaterials, Biomecànica i Enginyeria de Teixits Department, de Ciència dels Materials i Enginyeria Metal·lúrgica, ETSEIB, Technical University of Catalonia, Barcelona, Spain
- Nanoengineering Research Center (CRnE), Technical University of Catalonia, Catalonia, Spain
| | - Mónica Ortiz-Hernandez
- Biomaterials, Biomecànica i Enginyeria de Teixits Department, de Ciència dels Materials i Enginyeria Metal·lúrgica, ETSEIB, Technical University of Catalonia, Barcelona, Spain
- Nanoengineering Research Center (CRnE), Technical University of Catalonia, Catalonia, Spain
| | - Meritxell Molmeneu
- Biomaterials, Biomecànica i Enginyeria de Teixits Department, de Ciència dels Materials i Enginyeria Metal·lúrgica, ETSEIB, Technical University of Catalonia, Barcelona, Spain
- Nanoengineering Research Center (CRnE), Technical University of Catalonia, Catalonia, Spain
| | - Miguel Punset
- Biomaterials, Biomecànica i Enginyeria de Teixits Department, de Ciència dels Materials i Enginyeria Metal·lúrgica, ETSEIB, Technical University of Catalonia, Barcelona, Spain
- Nanoengineering Research Center (CRnE), Technical University of Catalonia, Catalonia, Spain
| | - José Antonio Calero
- AMES S.A. Carretera Nacional 340, Pol.Ind. Les Fallulles. S. Vicenç dels Horts, Barcelona, Spain
| | - Conrado Aparicio
- Minnesota Dental Research Center, Biomaterials and Biomechanics, School of Dentistry, University of Minnesota, Minneapolis, ME, USA
| | - Mariano Fernández-Fairén
- Biomaterials, Biomecànica i Enginyeria de Teixits Department, de Ciència dels Materials i Enginyeria Metal·lúrgica, ETSEIB, Technical University of Catalonia, Barcelona, Spain
- Nanoengineering Research Center (CRnE), Technical University of Catalonia, Catalonia, Spain
| | - Román Perez
- Biomaterials, Biomecànica i Enginyeria de Teixits Department, de Ciència dels Materials i Enginyeria Metal·lúrgica, ETSEIB, Technical University of Catalonia, Barcelona, Spain
- School of Dentistry, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Francisco Javier Gil
- Biomaterials, Biomecànica i Enginyeria de Teixits Department, de Ciència dels Materials i Enginyeria Metal·lúrgica, ETSEIB, Technical University of Catalonia, Barcelona, Spain.
- School of Dentistry, Universitat Internacional de Catalunya, Barcelona, Spain.
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Jin SK, Lee JH, Hong JH, Park JK, Seo YK, Kwon SY. Enhancement of osseointegration of artificial ligament by nano-hydroxyapatite and bone morphogenic protein-2 into the rabbit femur. Tissue Eng Regen Med 2016; 13:284-296. [PMID: 30603410 DOI: 10.1007/s13770-016-9051-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 08/14/2015] [Accepted: 08/18/2015] [Indexed: 01/24/2023] Open
Abstract
The MTT assay showed that the cell proliferation on hydroxyapatite (HAp) and HAp/bone morphogenic protein (BMP) coated group was better than the control and BMP coated groups at 5 days. And after 7 days of culture, the mRNA expression levels of type I collagen, osteonectin, osteopontin, bonesialoprotein, BMP-2, alkaline phosphatase (ALP) and Runx-2 in the HAp/BMP coated group were significantly higher than the other groups. Also, in this group showed the most significant induction of osteogenic gene expression compared to mesenchymal stem cells (MSCs) grown on the other groups. In addition, the cells in the HAp/BMP coated group delivered higher levels of ALP than the other three groups. Also, silk scaffolds were implanted as artificial ligaments in knees of rabbits, and they were harvested 1 and 3 months after implantation. On gross examination, HE staining showed that new bone tissue formation was more observed in the HAp/BMP coated group 3 weeks postoperatively. And masson staining showed that in the HAp/BMP coated group, the silk fibers were encircled by osteoblast, chondrocyte, and collagen. Furthermore, the analysis showed that the width of the graft-bone interface in the HAp and HAp/BMP coated group was narrower than that in the other two groups 3 weeks postoperatively. So, it is concluded that BMP incorporated HAp coated silk scaffold can be enhanced osseointegration and osteogenesis in bone tunnel. As a result, these experimental designs have been demonstrated to be effective in the acceleration of graft-to-bone healing by increasing new bone or fibrocartilage formation at the interface between graft and bone.
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Affiliation(s)
- Sung-Ki Jin
- 1Department of Orthopedic Surgery, St. Mary's Hospital, The Catholic University of Korea College of Medicine, 10 63-ro, Yeongdeungpo-gu, Seoul, 15071 Korea
| | - Joo-Heon Lee
- 1Department of Orthopedic Surgery, St. Mary's Hospital, The Catholic University of Korea College of Medicine, 10 63-ro, Yeongdeungpo-gu, Seoul, 15071 Korea
| | - Joo-Hee Hong
- Department of Industrial Technology & Chemical Engineering, Suncheon Jeil Colleage, Suncheon, Korea
| | - Jung-Keug Park
- 3Department of Medical Biotechnology, Dongguk University, 32 Dongguk-ro, Ilsandong-gu, Goyang, 41082 Korea
| | - Young-Kwon Seo
- 3Department of Medical Biotechnology, Dongguk University, 32 Dongguk-ro, Ilsandong-gu, Goyang, 41082 Korea
| | - Soon-Yong Kwon
- 1Department of Orthopedic Surgery, St. Mary's Hospital, The Catholic University of Korea College of Medicine, 10 63-ro, Yeongdeungpo-gu, Seoul, 15071 Korea
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Kamo M, Kyomoto M, Miyaji F. Time course of surface characteristics of alkali- and heat-treated titanium dental implants during vacuum storage. J Biomed Mater Res B Appl Biomater 2016; 105:1453-1460. [DOI: 10.1002/jbm.b.33686] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 03/16/2016] [Accepted: 03/29/2016] [Indexed: 12/15/2022]
Affiliation(s)
- Michimasa Kamo
- Research Department; KYOCERA Medical Corporation; Yodogawa-ku Osaka 532-0003 Japan
| | - Masayuki Kyomoto
- Research Department; KYOCERA Medical Corporation; Yodogawa-ku Osaka 532-0003 Japan
- Department of Materials Engineering; School of Engineering; The University of Tokyo; Bunkyo-ku Tokyo 113-8656 Japan
- Division of Science for Joint Reconstruction; Graduate School of Medicine; The University of Tokyo; Bunkyo-ku Tokyo 113-8655 Japan
| | - Fumiaki Miyaji
- Research Department; KYOCERA Medical Corporation; Yodogawa-ku Osaka 532-0003 Japan
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Qian J, Ma J, Su J, Yan Y, Li H, Shin JW, Wei J, Zhao L. PHBV-based ternary composite by intermixing of magnesium calcium phosphate nanoparticles and zein: In vitro bioactivity, degradability and cytocompatibility. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2015.12.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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New Ti-Alloys and Surface Modifications to Improve the Mechanical Properties and the Biological Response to Orthopedic and Dental Implants: A Review. BIOMED RESEARCH INTERNATIONAL 2016; 2016:2908570. [PMID: 26885506 PMCID: PMC4738729 DOI: 10.1155/2016/2908570] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 11/30/2015] [Indexed: 12/14/2022]
Abstract
Titanium implants are widely used in the orthopedic and dentistry fields for many decades, for joint arthroplasties, spinal and maxillofacial reconstructions, and dental prostheses. However, despite the quite satisfactory survival rates failures still exist. New Ti-alloys and surface treatments have been developed, in an attempt to overcome those failures. This review provides information about new Ti-alloys that provide better mechanical properties to the implants, such as superelasticity, mechanical strength, and corrosion resistance. Furthermore, in vitro and in vivo studies, which investigate the biocompatibility and cytotoxicity of these new biomaterials, are introduced. In addition, data regarding the bioactivity of new surface treatments and surface topographies on Ti-implants is provided. The aim of this paper is to discuss the current trends, advantages, and disadvantages of new titanium-based biomaterials, fabricated to enhance the quality of life of many patients around the world.
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Bütev E, Esen Z, Bor Ş. Characterization of Ti6Al7Nb alloy foams surface treated in aqueous NaOH and CaCl2 solutions. J Mech Behav Biomed Mater 2016; 60:127-138. [PMID: 26807769 DOI: 10.1016/j.jmbbm.2015.12.040] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 12/23/2015] [Accepted: 12/24/2015] [Indexed: 10/22/2022]
Abstract
Ti6Al7Nb alloy foams having 53-73% porosity were manufactured via evaporation of magnesium space holders. A bioactive 1µm thick sodium hydrogel titanate layer, NaxH2-xTiyO2y+1, formed after 5M NaOH treatment, was converted to crystalline sodium titanate, Na2TiyO2y+1, as a result of post-heat treatment. On the other hand, subsequent CaCl2 treatment of NaOH treated specimens induced calcium titanate formation. However, heat treatment of NaOH-CaCl2 treated specimens led to the loss of calcium and disappearance of the titanate phase. All of the aforementioned surface treatments reduced yield strengths due to the oxidation of the cell walls of the foams, while elastic moduli remained mostly unchanged. Accordingly, equiaxed dimples seen on the fracture surfaces of as-manufactured foams turned into relatively flat and featureless fracture surfaces after surface treatments. On the other hand, Ca- and Na-rich coating preserved their mechanical stabilities and did not spall during fracture. The relation between mechanical properties of foams and macro-porosity fraction were found to obey a power law. The foams with 63 and 73% porosity met the desired biocompatibility requirements with fully open pore structures and elastic moduli similar to that of bone. In vitro tests conducted in simulated body fluid (SBF) showed that NaOH-heat treated surfaces exhibit the highest bioactivity and allow the formation of Ca-P rich phases having Ca/P ratio of 1.3 to form within 5 days. Although Ca-P rich phases formed only after 15 days on NaOH-CaCl2 treated specimens, the Ca/P ratio was closer to that of apatite found in bone.
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Affiliation(s)
- Ezgi Bütev
- Çankaya University, Materials Science and Engineering Department, 06810 Ankara, Turkey; Middle East Technical University, Metallurgical and Materials Engineering Department, 06800 Ankara, Turkey.
| | - Ziya Esen
- Çankaya University, Materials Science and Engineering Department, 06810 Ankara, Turkey.
| | - Şakir Bor
- Middle East Technical University, Metallurgical and Materials Engineering Department, 06800 Ankara, Turkey.
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Pylypchuk IV, Petranovskaya AL, Gorbyk PP, Korduban AM, Markovsky PE, Ivasishin OM. Biomimetic Hydroxyapatite Growth on Functionalized Surfaces of Ti-6Al-4V and Ti-Zr-Nb Alloys. NANOSCALE RESEARCH LETTERS 2015; 10:1017. [PMID: 26297184 PMCID: PMC4546072 DOI: 10.1186/s11671-015-1017-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 07/24/2015] [Indexed: 06/04/2023]
Abstract
A biomimetic approach for coating titanium-containing alloys with hydroxyapatite (HA) is reported in the article. Two types of Ti-containing alloys were chosen as an object for coating: Ti-6Al-4V (recommended for orthopedic application) and a novel highly biocompatible Ti-Zr-Nb alloy, with good mechanical compatibility due to a modulus that is more close to that of human bones (E ≈ 50 GPa instead of 110 GPa in Ti-6Al-4V). Coating process was carried out in a 10×-concentrated simulated body fluid (SBF)-synthetic analog of human body plasma. The effect of oxidized and carboxylated alloy surface on formation of biomimetic hydroxyapatite has been studied. By XRD, we found influence of thermal conditions on HA crystal formation and size. SEM images and Fourier transform infrared confirmed that hydroxyapatite with different morphology, crystallinity, and Ca/P ratio formed on metallic surfaces. X-ray photoelectron spectroscopy showed that in the Ti-6AL-4V sample the observed Ca/P ratio reach 0.97, whereas in the Ti-Zr-Nb sample the observed Ca/P ratio reach 1.15.
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Affiliation(s)
- Ie V Pylypchuk
- Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, 17 General Naumov Str., Kyiv, 03164, Ukraine,
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Kokubo T, Yamaguchi S. Growth of Novel Ceramic Layers on Metals via Chemical and Heat Treatments for Inducing Various Biological Functions. Front Bioeng Biotechnol 2015; 3:176. [PMID: 26579517 PMCID: PMC4621495 DOI: 10.3389/fbioe.2015.00176] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Accepted: 10/13/2015] [Indexed: 12/23/2022] Open
Abstract
The present authors' systematic studies on growth of novel ceramic layers on Ti metal and its alloys by chemical and heat treatments for inducing bone-bonding bioactivity and some other biological functions are reviewed. Ti metal formed an apatite on its surface in a simulated body fluid, when heat-treated after exposure to strong acid solutions to form rutile surface layer, or to strong alkali solutions to form sodium titanate surface layer. Both types of Ti metal tightly bonded to the living bone. The alkali and heat treatment was applied to the surface Ti metal of an artificial hip joint and successfully used in the clinic since 2007. The acid and heat treatments was applied to porous Ti metal to induce osteoconductivity as well as osteoinductivity. The resulting product was successfully used in clinical trials for spinal fusion devices. For the Ti-based alloys, the alkali and heat treatment was little modified to form calcium titanate surface layer. Bone-growth promoting Mg, Sr, and Zn ions as well as the antibacterial Ag ion were successfully incorporated into the calcium titanate layer.
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Affiliation(s)
- Tadashi Kokubo
- Department of Biomedical Sciences, College of Life and Health Sciences, Chubu University , Kasugai , Japan
| | - Seiji Yamaguchi
- Department of Biomedical Sciences, College of Life and Health Sciences, Chubu University , Kasugai , Japan
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Lewandowska-Łańcucka J, Fiejdasz S, Rodzik Ł, Łatkiewicz A, Nowakowska M. Novel hybrid materials for preparation of bone tissue engineering scaffolds. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:231. [PMID: 26347455 DOI: 10.1007/s10856-015-5564-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 08/29/2015] [Indexed: 06/05/2023]
Abstract
The organic-inorganic hybrid systems based on biopolymer hydrogels with dispersed silica nanoparticles were obtained and characterized in terms of their physicochemical properties, cytocompatibility and bioactivity. The hybrid materials were prepared in a form of collagen and collagen-chitosan sols to which the silica nanoparticles of two different sizes were incorporated. The ability of these materials to undergo in situ gelation under physiological temperature was assessed by microviscosity and gelation time determination based on steady-state fluorescence anisotropy measurements. The effect of silica nanoparticles addition on the physicochemical properties (surface wettability, swellability) of hybrid materials was analyzed and compared with those characteristic for pristine collagen and collagen-chitosan hydrogels. Biological studies indicate that surface wettability determined in terms of contact angle for all of the hybrids prepared is optimal and thus can provide satisfactory adhesion of fibroblasts. Cytotoxicity test results showed high metabolic activity of mouse as well as human fibroblast cell lines cultured on hybrid materials. The composition of hybrids was optimized in terms of concentration of silica nanoparticles. The effect of silica on the formation of bone-like mineral structures on exposition to simulated body fluid was determined. SEM images revealed mineral phase formation not only at the surfaces but also in the whole volumes of all hybrid materials developed suggesting their usefulness for bone tissue engineering. EDS and FTIR analyses indicated that these mineral phases consist of apatite-like structures.
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Calcium orthophosphate deposits: Preparation, properties and biomedical applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 55:272-326. [PMID: 26117762 DOI: 10.1016/j.msec.2015.05.033] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 03/21/2015] [Accepted: 05/08/2015] [Indexed: 01/12/2023]
Abstract
Since various interactions among cells, surrounding tissues and implanted biomaterials always occur at their interfaces, the surface properties of potential implants appear to be of paramount importance for the clinical success. In view of the fact that a limited amount of materials appear to be tolerated by living organisms, a special discipline called surface engineering was developed to initiate the desirable changes to the exterior properties of various materials but still maintaining their useful bulk performances. In 1975, this approach resulted in the introduction of a special class of artificial bone grafts, composed of various mechanically stable (consequently, suitable for load bearing applications) implantable biomaterials and/or bio-devices covered by calcium orthophosphates (CaPO4) to both improve biocompatibility and provide an adequate bonding to the adjacent bones. Over 5000 publications on this topic were published since then. Therefore, a thorough analysis of the available literature has been performed and about 50 (this number is doubled, if all possible modifications are counted) deposition techniques of CaPO4 have been revealed, systematized and described. These CaPO4 deposits (coatings, films and layers) used to improve the surface properties of various types of artificial implants are the topic of this review.
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Kokubo T, Yamaguchi S. Bioactive titanate layers formed on titanium and its alloys by simple chemical and heat treatments. Open Biomed Eng J 2015; 9:29-41. [PMID: 25893014 PMCID: PMC4391211 DOI: 10.2174/1874120701509010029] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 08/26/2014] [Accepted: 08/27/2014] [Indexed: 12/26/2022] Open
Abstract
To reveal general principles for obtaining bone-bonding bioactive metallic titanium, Ti metal was heat-treated after exposure to a solution with different pH. The material formed an apatite layer at its surface in simulated body fluid when heat-treated after exposure to a strong acid or alkali solution, because it formed a positively charged titanium oxide and negatively charged sodium titanate film on its surface, respectively. Such treated these Ti metals tightly bonded to living bone. Porous Ti metal heat-treated after exposure to an acidic solution exhibited not only osteoconductive, but also osteoinductive behavior. Porous Ti metal exposed to an alkaline solution also exhibits osteoconductivity as well as osteoinductivity, if it was subsequently subjected to acid and heat treatments. These acid and heat treatments were not effective for most Ti-based alloys. However, even those alloys exhibited apatite formation when they were subjected to acid and heat treatment after a NaOH treatment, since the alloying elements were removed from the surface by the latter. The NaOH and heat treatments were also not effective for Ti-Zr-Nb-Ta alloys. These alloys displayed apatite formation when subjected to CaCl2 treatment after NaOH treatment, forming Ca-deficient calcium titanate at their surfaces after subsequent heat and hot water treatments. The bioactive Ti metal subjected to NaOH and heat treatments has been clinically used as an artificial hip joint material in Japan since 2007. A porous Ti metal subjected to NaOH, HCl and heat treatments has successfully undergone clinical trials as a spinal fusion device.
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Affiliation(s)
- Tadashi Kokubo
- Department of Biomedical Sciences, College of Life and Health Sciences, Chubu University 1200 Matsumoto-chow, Kasugai, Aichi 487-8501 Japan
| | - Seiji Yamaguchi
- Department of Biomedical Sciences, College of Life and Health Sciences, Chubu University 1200 Matsumoto-chow, Kasugai, Aichi 487-8501 Japan
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Gandolfi MG, Taddei P, Siboni F, Perrotti V, Iezzi G, Piattelli A, Prati C. Micro-topography and reactivity of implant surfaces: an in vitro study in simulated body fluid (SBF). MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2015; 21:190-203. [PMID: 25667970 DOI: 10.1017/s1431927614014615] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The creation of micro-textured dental implant surfaces possessing a stimulating activity represents a challenge in implant dentistry; particularly, the formation of a thin, biologically active, calcium-phosphate layer on their surface could help to strengthen the bond to the surrounding bone. The aim of the present study was to characterize in terms of macrostructure, micro-topography and reactivity in simulated body fluid (SBF), the surface of titanium (Ti) implants blasted with TiO2 particles, acid etched with hydrofluoric acid, and activated with Ca and Mg-containing nanoparticles. Sandblasted and acid-etched implants were analyzed by ESEM-EDX (environmental scanning electron microscope with energy dispersive X-ray system) to study the micromorphology of the surface and to perform elemental X-ray microanalysis (microchemical analyses) and element mapping. ESEM-EDX analyses were performed at time 0 and after a 28-day soaking period in SBF Hank's balanced salt solution (HBSS) following ISO 23317 (implants for surgery—in vitro evaluation for apatite-forming ability of implant materials). Microchemical analyses (weight % and atomic %) and element mapping were carried out to evaluate the relative element content, element distribution, and calcium/phosphorus (Ca/P) atomic ratio. Raman spectroscopy was used to assess the possible presence of impurities due to manufacturing and to investigate the phases formed upon HBSS soaking. Micro-morphological analyses showed a micro-textured, highly rough surface with microgrooves. Microchemical analyses showed compositional differences among the apical, middle, and distal thirds. The micro-Raman analyses of the as-received implant showed the presence of amorphous Ti oxide and traces of anatase, calcite, and a carbonaceous material derived from the decomposition of an organic component of lipidic nature (presumably used as lubricant). A uniform layer of Ca-poor calcium phosphates (CaPs) (Ca/P ratio <1.47) was observed after soaking in HBSS; the detection of the 961 cm⁻¹ Raman band confirms this finding. These implants showed a micro-textured surface supporting the formation of CaPs when immersed in SBF. These properties may likely favor bone anchorage and healing by stimulation of mineralizing cells.
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Affiliation(s)
- M G Gandolfi
- 1Department of Biomedical and NeuroMotor Sciences,University of Bologna - Via San Vitale 59 - 40126,Bologna,Italy
| | - P Taddei
- 1Department of Biomedical and NeuroMotor Sciences,University of Bologna - Via San Vitale 59 - 40126,Bologna,Italy
| | - F Siboni
- 1Department of Biomedical and NeuroMotor Sciences,University of Bologna - Via San Vitale 59 - 40126,Bologna,Italy
| | - V Perrotti
- 2Department of Medical,Oral and Biotechnological Sciences,University of Chieti-Pescara - Via dei Vestini 1 - 66100,Chieti,Italy
| | - G Iezzi
- 2Department of Medical,Oral and Biotechnological Sciences,University of Chieti-Pescara - Via dei Vestini 1 - 66100,Chieti,Italy
| | - A Piattelli
- 2Department of Medical,Oral and Biotechnological Sciences,University of Chieti-Pescara - Via dei Vestini 1 - 66100,Chieti,Italy
| | - C Prati
- 1Department of Biomedical and NeuroMotor Sciences,University of Bologna - Via San Vitale 59 - 40126,Bologna,Italy
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Loszach M, Gitzhofer F. Induction suspension plasma sprayed biological-like hydroxyapatite coatings. J Biomater Appl 2015; 29:1256-71. [DOI: 10.1177/0885328214562435] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Substituted hydroxyapatite coatings with different ions (Mg, Na, K, Cl, F) have been developed by the induction suspension plasma spray process. Suspensions were prepared with sol–gel. The main objective of this study was to demonstrate that induction suspension plasma spray technology possesses high material composition flexibility that allows as-sprayed coatings to closely mimic natural bone composition. Long-term in vitro behaviour of as-sprayed substituted coatings was evaluated with simulated body fluid. Data on the suspensions showed the formation of a pure hydroxyapatite phase. Transmission electron microscopy characterized various preparation stages of the suspensions. As-sprayed samples were distinguished by X-ray diffraction and scanning electron microscopy. Substituted elements were quantified by neutron activation. A well-crystallized hydroxyapatite phase was produced with concentration in various substitutions very close to natural bone composition. Ca/P and (Ca + Mg + Na + K)/P ratios provided evidence of the introduction of different cations into apatite structures. The immersion of samples into simulated body fluid led to the nucleation and growth of a flake-like octacalcium phosphate crystal layer at the surface of as-sprayed coatings after one week. Proof of octacalcium phosphate transformation and its partial dissolution and direct re-precipitation into apatite was disclosed by local energy dispersive spectroscopy and microstructure observation. Formation of a Ca/P ratio gradient from the precipitated layer surface to the as-sprayed coatings interface was observed after four weeks once the octacalcium phosphate crystals reached a critical size, resulting in the formation of a rich apatite layer at the interface after six weeks. A set of mechanisms has been proposed to explain these findings.
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Affiliation(s)
- Max Loszach
- Department of Chemical and Biotechnological Engineering, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - François Gitzhofer
- Department of Chemical and Biotechnological Engineering, Université de Sherbrooke, Sherbrooke, Québec, Canada
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Abdal-Hay A, Hamdy AS, Khalil KA, Lim JH. A novel simple one-step air jet spinning approach for deposition of poly(vinyl acetate)/hydroxyapatite composite nanofibers on Ti implants. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 49:681-690. [PMID: 25686997 DOI: 10.1016/j.msec.2015.01.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Revised: 01/02/2015] [Accepted: 01/04/2015] [Indexed: 10/24/2022]
Abstract
A biocompatible coating consists of a poly(vinyl acetate)/hydroxyapatite (PVAc/HA) composite nanofiber mat was applied to NaOH-treated titanium metal by means of a novel, facile and efficient air jet spinning (AJS) approach. Results showed that HA nanoparticles (NPs) strongly embedded onto the AJS single fiber surface resulting in a strong chemical interfacial bonding between the two phases due to the difference in kinetic energies. It was proven that AJS membrane coatings can provide significant improvement in the corrosion resistance of titanium substrate. Interestingly, the biocompatibility using MC3T3-E1 osteoblast to the PVAc/HA fiber composite layer coated on Ti was significantly higher than pure titanium-substrates.
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Affiliation(s)
- Abdalla Abdal-Hay
- Dept. of Engineering Materials and Mechanical Design, Faculty of Engineering, South Valley of University, Qena 83523, Egypt; Dept. of Computer Science, Faculty of Engineering, Universidad de Cuenca, Cuenca 01.01.168, Ecuador; Dept. of Bionano System Engineering, College of Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea.
| | - Abdel Salam Hamdy
- Dept. of Manufacturing Engineering, College of Engineering and Computer Science, University of Texas Pan-American, 1201 West University Dr., Edinburg, TX 78541-2999, USA
| | - Khalil Abdelrazek Khalil
- Dept. of Mechanical Engineering, College of Engineering King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia; Department of Mechanical Engineering, Faculty of Energy Engineering, Aswan University, Aswan, Egypt
| | - Ju Hyun Lim
- Dept. of Urology, Gangneung Asan Hospital, University of Ulsan, College of Medicine, Gangneung, Republic of Korea.
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Abstract
Pedicle screw (PS) system using Ti-6Al-4V PSs became popular in spinal instrumentation system. However, they sometimes case loosening and back-out from bone because of their poor bone-bonding ability. In the present study, Ti-6Al-4V alloy was subjected to the acid-heat or calcium-heat treatments that are effective for inducing high capacities of apatite formation and bone bonding on pure Ti. When the alloy was subjected to the acid-heat treatment, a surface layer composed of rutile and anatase TiO2 enriched with Al and V was produced. Thus the treated alloy was neutrally charged and did not form apatite in a simulated body fluid (SBF) even after 3 day. In contrast, when the alloy was subjected to the Ca-heat treatment, a surface layer composed of calcium titanate, anatase and rutile free from Al and V was produced. The treated alloy formed apatite in SBF within 3 days. When the Ti-6Al-4V PSs subjected to the Ca-heat treatment was implanted into vertebra of beagle dogs, they showed higher bone-bonding ability as well as bone contact area than those without the treatment. This kind of bioactive Ti-6Al-4V PSs might be useful for spinal instrumentation since they could prevent loosening and back-out from bone.
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Bioactive coatings for orthopaedic implants-recent trends in development of implant coatings. Int J Mol Sci 2014; 15:11878-921. [PMID: 25000263 PMCID: PMC4139820 DOI: 10.3390/ijms150711878] [Citation(s) in RCA: 168] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Revised: 06/11/2014] [Accepted: 06/16/2014] [Indexed: 01/21/2023] Open
Abstract
Joint replacement is a major orthopaedic procedure used to treat joint osteoarthritis. Aseptic loosening and infection are the two most significant causes of prosthetic implant failure. The ideal implant should be able to promote osteointegration, deter bacterial adhesion and minimize prosthetic infection. Recent developments in material science and cell biology have seen the development of new orthopaedic implant coatings to address these issues. Coatings consisting of bioceramics, extracellular matrix proteins, biological peptides or growth factors impart bioactivity and biocompatibility to the metallic surface of conventional orthopaedic prosthesis that promote bone ingrowth and differentiation of stem cells into osteoblasts leading to enhanced osteointegration of the implant. Furthermore, coatings such as silver, nitric oxide, antibiotics, antiseptics and antimicrobial peptides with anti-microbial properties have also been developed, which show promise in reducing bacterial adhesion and prosthetic infections. This review summarizes some of the recent developments in coatings for orthopaedic implants.
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Fatehi K, Moztarzadeh F, Tahriri M, Khoshroo K, Heidari S, Sadeghi A. Biomimetic Synthesis, Characterization, and Adhesion Properties of Bone-Like Apatite on Heat and Alkaline-Treated Titanium Alloy. ACTA ACUST UNITED AC 2014. [DOI: 10.1080/15533174.2013.809747] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Kambiz Fatehi
- Biomaterials Group, Faculty of Biomedical Engineering (Center of Excellence), Amirkabir University of Technology, Tehran, I. R. Iran
| | - Fathollah Moztarzadeh
- Biomaterials Group, Faculty of Biomedical Engineering (Center of Excellence), Amirkabir University of Technology, Tehran, I. R. Iran
| | - Mohammadreza Tahriri
- Iranian Tissue Bank & Research Center, Tehran University of Medical Sciences, Tehran, I. R. Iran
- Dental Materials Department, School of Dentistry, Tehran University of Medical Sciences, Tehran, I. R. Iran
| | - Kimia Khoshroo
- Dental Materials Department, School of Dentistry, Tehran University of Medical Sciences, Tehran, I. R. Iran
| | - Soolmaz Heidari
- Dental Materials Department, School of Dentistry, Tehran University of Medical Sciences, Tehran, I. R. Iran
| | - Ali Sadeghi
- Biomaterials Group, Faculty of Biomedical Engineering (Center of Excellence), Amirkabir University of Technology, Tehran, I. R. Iran
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