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Yu L, Silva Santisteban TM, Liu Q, Hu C, Bi J, Wei M. Effect of three-dimensional porosity gradients of biomimetic coatings on their bonding strength and cell behavior. J Biomed Mater Res A 2020; 109:615-626. [PMID: 32608169 DOI: 10.1002/jbm.a.37046] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 03/19/2020] [Accepted: 06/06/2020] [Indexed: 02/06/2023]
Abstract
Surface modification techniques are often used to enhance the properties of Ti-based materials as hard-tissue replacements. While the microstructure of the coating and the quality of the interface between the substrate and coating are essential to evaluate the reliability and applicability of the surface modification. In this study, both a hydroxyapatite (HA) coating and a collagen-hydroxyapatite (Col-HA) composite coating were deposited onto a Ti-6Al-4V substrate using a biomimetic coating process. Importantly, a gradient cross-sectional structure with a porous coating toward the surface, while a dense layer adjacent to the interface between the coating and substrate was observed in three-dimensional (3D) from both the HA and Col-HA coatings via a dual-beam focused ion beam-scanning electron microscope (FIB-SEM). Moreover, the pore distributions within the entire coatings were reconstructed in 3D using Avizo, and the pores size distributions along the coating depth were calculated using RStudio. By evaluating the mechanical property and biocompatibility of these materials and closely observing the cross-sectional cell-coating-substrate interfaces using FIB-SEM, it was revealed that the porous surface created by both coatings well supports osteoblast cell adhesion while the dense inner layer facilitates a good bonding between the coating and the substrate. Although the mechanical property of the coating decreased with the addition of collagen, it is still strong enough for implant handling and the biocompatibility was promoted.
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Affiliation(s)
- Le Yu
- Department of Materials Science and Engineering, University of Connecticut, Storrs, Connecticut, USA.,Department of Chemical and Biomolecular Engineering, Ohio University, Athens, Ohio, USA
| | | | - Qinqing Liu
- Department of Computer Science and Engineering, University of Connecticut, Storrs, Connecticut, USA
| | - Changmin Hu
- Institute of Materials Science, University of Connecticut, Storrs, Connecticut, USA
| | - Jinbo Bi
- Department of Computer Science and Engineering, University of Connecticut, Storrs, Connecticut, USA
| | - Mei Wei
- Department of Materials Science and Engineering, University of Connecticut, Storrs, Connecticut, USA.,Institute of Materials Science, University of Connecticut, Storrs, Connecticut, USA.,Department of Mechanical Engineering, Ohio University, Athens, Ohio, USA
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Cell response to plasma electrolytic oxidation surface-modified low-modulus β-type titanium alloys. Colloids Surf B Biointerfaces 2019; 176:176-184. [DOI: 10.1016/j.colsurfb.2018.12.064] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 12/18/2018] [Accepted: 12/22/2018] [Indexed: 12/24/2022]
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Elkhidir Y, Lai R, Feng Z. The impact of photofunctionalized gold nanoparticles on osseointegration. Heliyon 2018; 4:e00662. [PMID: 30094359 PMCID: PMC6077240 DOI: 10.1016/j.heliyon.2018.e00662] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 01/10/2018] [Accepted: 06/18/2018] [Indexed: 12/30/2022] Open
Abstract
OBJECTIVES The aims of this study were to create a new surface topography using simulated body fluids (SBF) and Gold Nanoparticles (GNPs) and then to assess the influence of UV Photofunctionalization (PhF) on the osteogenic capacity of these surfaces. MATERIALS AND METHODS Titanium plates were divided into six groups All were acid etched with 67% Sulfuric acid, 4 were immersed in SBF and 2 of these were treated with 10 nm GNPs. Half of the TiO2 plates were photofunctionalized to be compared with the non-PhF ones. Rat's bone marrow stem cells were seeded into the plates and then CCK8 assay, cell viability assay, immunofluorescence, and Scanning electron microscopy (SEM) were done after 24 hours. Gene expression analysis was done using real time quantitative PCR (qPCR) one week later to check for the mRNA expression of Collagen-1, Osteopontin and Osteocalcin. Alkaline phosphatase (ALP) activity was assessed after 2 weeks of cell seeding. RESULTS Our new topography has shown remarkable osteogenic potential. The new surface was the most biocompatible, and the 10 nm GNPs did not show any cytotoxicity. There was a significant increase in bioactivity, enhanced gene expressions and ALP activity. CONCLUSIONS GNPs enhances osteogenic differentiation of stem cells and Photofunctionalizing GNPs highly increases this. We have further created a novel highly efficient topography which highly enhances the speed and extent of osseointegration. This may have great potential for improving treatment outcomes for implant, maxillofacial as well as orthopedic patients.
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Affiliation(s)
| | | | - Zhiqiang Feng
- Implant Department – Suihua, The First Affiliated Stomatological Hospital of Jinan University, PR China
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Kaluđerović MR, Schreckenbach JP, Graf HL. Titanium dental implant surfaces obtained by anodic spark deposition – From the past to the future. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 69:1429-41. [DOI: 10.1016/j.msec.2016.07.068] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Revised: 06/25/2016] [Accepted: 07/25/2016] [Indexed: 12/11/2022]
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Saita M, Ikeda T, Yamada M, Kimoto K, Lee MCI, Ogawa T. UV photofunctionalization promotes nano-biomimetic apatite deposition on titanium. Int J Nanomedicine 2016; 11:223-34. [PMID: 26834469 PMCID: PMC4716735 DOI: 10.2147/ijn.s95249] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Background Although biomimetic apatite coating is a promising way to provide titanium with osteoconductivity, the efficiency and quality of deposition is often poor. Most titanium implants have microscale surface morphology, and an addition of nanoscale features while preserving the micromorphology may provide further biological benefit. Here, we examined the effect of ultraviolet (UV) light treatment of titanium, or photofunctionalization, on the efficacy of biomimetic apatite deposition on titanium and its biological capability. Methods and results Micro-roughed titanium disks were prepared by acid-etching with sulfuric acid. Micro-roughened disks with or without photofunctionalization (20-minute exposure to UV light) were immersed in simulated body fluid (SBF) for 1 or 5 days. Photofunctionalized titanium disks were superhydrophilic and did not form surface air bubbles when immersed in SBF, whereas non-photofunctionalized disks were hydrophobic and largely covered with air bubbles during immersion. An apatite-related signal was observed by X-ray diffraction on photofunctionalized titanium after 1 day of SBF immersion, which was equivalent to the one observed after 5 days of immersion of control titanium. Scanning electron microscopy revealed nodular apatite deposition in the valleys and at the inclines of micro-roughened structures without affecting the existing micro-configuration. Micro-roughened titanium and apatite-deposited titanium surfaces had similar roughness values. The attachment, spreading, settling, proliferation, and alkaline phosphate activity of bone marrow-derived osteoblasts were promoted on apatite-coated titanium with photofunctionalization. Conclusion UV-photofunctionalization of titanium enabled faster deposition of nanoscale biomimetic apatite, resulting in the improved biological capability compared to the similarly prepared apatite-deposited titanium without photofunctionalization. Photofunctionalization-assisted biomimetic apatite deposition may be a novel method to effectively enhance micro-roughened titanium surfaces without altering their microscale morphology.
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Affiliation(s)
- Makiko Saita
- Division of Advanced Prosthodontics, Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Takayuki Ikeda
- Division of Advanced Prosthodontics, Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA, USA; Department of Complete Denture Prosthodontics, Nihon University School of Dentistry, Yokosuka, Japan
| | - Masahiro Yamada
- Division of Advanced Prosthodontics, Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA, USA; Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan
| | - Katsuhiko Kimoto
- Department of Prosthodontics and Oral Rehabilitation, Kanagawa Dental University Graduate School of Dentistry, Yokosuka, Japan
| | - Masaichi Chang-Il Lee
- Yokosuka-Shonan Disaster Health Emergency Research Center and ESR Laboratories, Kanagawa Dental University Graduate School of Dentistry, Yokosuka, Japan
| | - Takahiro Ogawa
- Division of Advanced Prosthodontics, Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA, USA
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Bertollo N, Sandrini E, Dalla Pria P, Walsh WR. Osseointegration of multiphase anodic spark deposition treated porous titanium implants in an ovine model. J Arthroplasty 2015; 30:484-8. [PMID: 25540993 DOI: 10.1016/j.arth.2013.10.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Revised: 09/11/2013] [Accepted: 10/03/2013] [Indexed: 02/01/2023] Open
Abstract
Modification of titanium oxide by multiphase anodic spark deposition (ASD) has the potential to increase bioactivity and hasten osseointegration and biological fixation in uncemented arthroplasty. This study assessed the in vivo performance of control (Ti), plasma-sprayed HA-coated (TiHA) and ASD (Biospark) treated (TiAn) porous titanium implants with a solid core using a standard uncemented implant fixation sheep model. Cortical interfacial shear-strength and bone ingrowth in cortical and cancellous sites were quantified following 12 weeks in situ. Ultimate shear-strength for the Ti, TiHA and TiAn coatings was 33±9.5, 35.4±8.4 and 33.8±7.8 MPa, respectively, which was limited by coating delamination. ASD treatment was associated with significantly higher mean bone ingrowth at both sites. These results support the osteoconductive potential of the BioSpark treatment of porous titanium.
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Affiliation(s)
- Nicky Bertollo
- Surgical & Orthopaedic Research Laboratories, University of New South Wales, Prince of Wales Hospital Clinical School, Sydney, Australia
| | | | | | - William R Walsh
- Surgical & Orthopaedic Research Laboratories, University of New South Wales, Prince of Wales Hospital Clinical School, Sydney, Australia
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Balasundaram G, Storey DM, Webster TJ. Molecular plasma deposition: biologically inspired nanohydroxyapatite coatings on anodized nanotubular titanium for improving osteoblast density. Int J Nanomedicine 2015; 10:527-35. [PMID: 25609958 PMCID: PMC4298345 DOI: 10.2147/ijn.s65308] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
In order to begin to prepare a novel orthopedic implant that mimics the natural bone environment, the objective of this in vitro study was to synthesize nanocrystalline hydroxyapatite (NHA) and coat it on titanium (Ti) using molecular plasma deposition (MPD). NHA was synthesized through a wet chemical process followed by a hydrothermal treatment. NHA and micron sized hydroxyapatite (MHA) were prepared by processing NHA coatings at 500°C and 900°C, respectively. The coatings were characterized before and after sintering using scanning electron microscopy, atomic force microscopy, and X-ray diffraction. The results revealed that the post-MPD heat treatment of up to 500°C effectively restored the structural and topographical integrity of NHA. In order to determine the in vitro biological responses of the MPD-coated surfaces, the attachment and spreading of osteoblasts (bone-forming cells) on the uncoated, NHA-coated, and MHA-coated anodized Ti were investigated. Most importantly, the NHA-coated substrates supported a larger number of adherent cells than the MHA-coated and uncoated substrates. The morphology of these cells was assessed by scanning electron microscopy and the observed shapes were different for each substrate type. The present results are the first reports using MPD in the framework of hydroxyapatite coatings on Ti to enhance osteoblast responses and encourage further studies on MPD-based hydroxyapatite coatings on Ti for improved orthopedic applications.
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Affiliation(s)
| | | | - Thomas J Webster
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA ; Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia
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Souza FÁ, Queiroz TP, Sonoda CK, Okamoto R, Margonar R, Guastaldi AC, Nishioka RS, Garcia Júnior IR. Histometric analysis and topographic characterization ofcp Tiimplants with surfaces modified by laser with and without silica deposition. J Biomed Mater Res B Appl Biomater 2014; 102:1677-88. [DOI: 10.1002/jbm.b.33139] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 02/06/2014] [Accepted: 03/06/2014] [Indexed: 12/14/2022]
Affiliation(s)
- Francisley Á. Souza
- Department of Surgery and General Clinic; Araçatuba of Dental School, Univ Estadual Paulista Júlio de Mesquita Filho - UNESP; Araçatuba Brazil
| | - Thallita P. Queiroz
- Department of Surgery and General Clinic; Araçatuba of Dental School, Univ Estadual Paulista Júlio de Mesquita Filho - UNESP; Araçatuba Brazil
| | - Celso K. Sonoda
- Department of Surgery and General Clinic; Araçatuba of Dental School, Univ Estadual Paulista Júlio de Mesquita Filho - UNESP; Araçatuba Brazil
| | - Roberta Okamoto
- Department of Surgery and General Clinic; Araçatuba of Dental School, Univ Estadual Paulista Júlio de Mesquita Filho - UNESP; Araçatuba Brazil
| | - Rogério Margonar
- Department of Health Sciense; University Center of Araraquara - UNIARA; Araraquara Brazil
| | - Antônio C. Guastaldi
- Department of Physical Chemistry, Biomaterials Group; Institute of Chemistry, Univ Estadual Paulista Júlio de Mesquita Filho - UNESP; Araraquara Brazil
| | - Renato S. Nishioka
- Department of Dental Materials and Prothesis; São José dos Campos of Dental School, Univ Estadual Paulista Júlio de Mesquita Filho - UNESP; São José dos Campos Brazil
| | - Idelmo R. Garcia Júnior
- Department of Surgery and General Clinic; Araçatuba of Dental School, Univ Estadual Paulista Júlio de Mesquita Filho - UNESP; Araçatuba Brazil
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Zhang F, Zhang CF, Yin MN, Ren LF, Lin HS, Shi GS. Effect of heat treatment on H2O2/HCl etched pure titanium dental implant: an in vitro study. Med Sci Monit 2012; 18:BR265-72. [PMID: 22739726 PMCID: PMC3560775 DOI: 10.12659/msm.883204] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Background Surface chemistry of dental implant plays an important role in osseointegration. Heat treatment might alter surface chemistry and result in different biological response. The aim of this study was to investigate the roles of heat treatment of H2O2/HCl-treated Ti implants in cell attachment, proliferation and osteoblastic differentiation. Material/Methods Sandblasted, dual acid-etched and H2O2/HCl heat-treated discs were set as the control group and sandblasted, dual acid-etched H2O2/HCl-treated discs were the test group. Both groups’ discs were sent for surface characterization. MC3T3-E1 cells were seeded on these 2 groups’ discs for 3 hours to 14 days, and then cell attachment, cell proliferation and cell differentiation were evaluated. Results Scanning electron microscope analysis revealed that the titanium discs in the 2 groups shared the same surface topography, while x-ray diffraction examination showed an anatase layer in the control group and titanium hydride diffractions in the test group. The cell attachment of the test group was equivalent to that of the control group. Cell proliferation was slightly stimulated at all time points in the control group, but the alkaline phosphatase (ALP) activity and osteocalcin (OC) production increased significantly in the test group compared with those in the control group at every time point investigated (p<0.05 or p<0.01). Moreover, the osteoblastic differentiation-related genes AKP-2, osteopontin (OPN) and OC were greatly up-regulated in the test group (p<0.05 or p<0.01). Conclusions The results implied that surface chemistry played an important role in cell response, and H2O2/HCl etched titanium surface without subsequent heat treatment might improve osseointegration response.
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Affiliation(s)
- Feng Zhang
- Stomatology Center, Taizhou Hospital, Zhejiang Province, Linhai, China
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Comparativein vivostudy of commercially pure Ti implants with surfaces modified by laser with and without silicate deposition: Biomechanical and scanning electron microscopy analysis. J Biomed Mater Res B Appl Biomater 2012; 101:76-84. [DOI: 10.1002/jbm.b.32818] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Revised: 06/28/2012] [Accepted: 08/10/2012] [Indexed: 11/07/2022]
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Queiroz TP, Souza FÁ, Guastaldi AC, Margonar R, Garcia-Júnior IR, Hochuli-Vieira E. Commercially pure titanium implants with surfaces modified by laser beam with and without chemical deposition of apatite. Biomechanical and topographical analysis in rabbits. Clin Oral Implants Res 2012; 24:896-903. [PMID: 22540325 DOI: 10.1111/j.1600-0501.2012.02471.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/25/2012] [Indexed: 11/28/2022]
Abstract
OBJECTIVES The purpose of this study was to evaluate the surfaces of commercially pure titanium (cp Ti) implants modified by laser beam (LS), without and with hydroxyapatite deposition by the biomimetic method (HAB), without (HAB) and with thermal treatment (HABT), and compare them with implants with surfaces modified by acid treatment (AS) and with machined surfaces (MS), employing topographical and biomechanics analysis. METHODS Forty-five rabbits received 75 implants. After 30, 60, and 90 days, the implants were removed by reverse torque and the surfaces were topographically analyzed. RESULTS At 30 days, statistically significant difference (P < 0.05) was observed among all the surfaces and the MS, between HAB/HABT and AS and between HAB and LS. At 60 days, the reverse torque of LS, HAB, HABT, and AS differed significantly from MS. At 90 days, difference was observed between HAB and MS. The microtopographic analysis revealed statistical difference between the roughness of LS, HAB, and HABT when compared with AS and MS. CONCLUSIONS It was concluded that the implants LS, HAB, and HABT presented physicochemical and topographical properties superior to those of AS and MS and favored the osseointegration process in the shorter periods. In addition, HAB showed the best results when compared with other surfaces.
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Affiliation(s)
- Thallita P Queiroz
- Department of Surgery and Integrated Clinic, Division of Oral and Maxillofacial Surgery, Unesp - Univ Estadual Paulista, Dental School of Araçatuba, Araçatuba, Brazil.
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Wazen RM, Lefebvre LP, Baril E, Nanci A. Initial evaluation of bone ingrowth into a novel porous titanium coating. J Biomed Mater Res B Appl Biomater 2010; 94:64-71. [PMID: 20336725 DOI: 10.1002/jbm.b.31624] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Porous metals (sintered beads and meshes) have been used for many years for different orthopedic applications. Metal foams have been recently developed. These foams have the advantage of being more porous than the traditional coatings. Their high porosity provides more space for bone ingrowth and mechanical interlocking and presents more surface for implant-bone contact. The objective of this study was to evaluate in vivo bone ingrowth into Ti implants covered with a novel Ti foam coating. This foam contains 50% in volume of interconnected pores and a higher surface area compared to dense Ti. Both coated implants and dense Ti controls were placed transcortically in the rat tibia. The animals were sacrificed at 2 weeks after implantation, and the amount of bone in the implants was determined using backscattered electron imaging and X-ray microtomography. Already at this time interval, the pores within the Ti foam showed 97.7% bone filling, and the bone-implant contact area was significantly increased compared to dense Ti controls. These initial results indicate that this novel Ti foam is biocompatible, has the capacity to sustain bone formation, and can potentially improve osseointegration.
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Affiliation(s)
- Rima M Wazen
- Laboratory for the Study of Calcified Tissues and Biomaterials, Faculty of Dentistry, Université de Montréal, 2900, boul. Edouard-Montpetit, Pavillon Roger-Gaudry, Montréal, Québec H3T 1J4, Canada
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In vitro cellular response and in vivo primary osteointegration of electrochemically modified titanium. Acta Biomater 2010; 6:1014-24. [PMID: 19800423 DOI: 10.1016/j.actbio.2009.09.022] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2009] [Revised: 09/26/2009] [Accepted: 09/28/2009] [Indexed: 11/23/2022]
Abstract
Anodic spark deposition (ASD) is an attractive technique for improving the implant-bone interface that can be applied to titanium and titanium alloys. This technique produces a surface with microporous morphology and an oxide layer enriched with calcium and phosphorus. The aim of the present study was to investigate the biological response in vitro using primary human osteoblasts as a cellular model and the osteogenic primary response in vivo within a short experimental time frame (2 and 4 weeks) in an animal model (rabbit). Responses were assessed by comparing the new electrochemical biomimetic treatments to an acid-etching treatment as control. The in vitro biological response was characterized by cell morphology, adhesion, proliferation activity and cell metabolic activity. A complete assessment of osteogenic activity in vivo was achieved by estimating static and dynamic histomorphometric parameters at several time points within the considered time frame. The in vitro study showed enhanced osteoblast adhesion and higher metabolic activity for the ASD-treated surfaces during the first days after seeding compared to the control titanium. For the ASD surfaces, the histomorphometry indicated a higher mineral apposition rate within 2 weeks and a more extended bone activation within the first week after surgery, leading to more extensive bone-implant contact after 2 weeks. In conclusion, the ASD surface treatments enhanced the biological response in vitro, promoting an early osteoblast adhesion, and the osteointegrative properties in vivo, accelerating the primary osteogenic response.
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Nan K, Wu T, Chen J, Jiang S, Huang Y, Pei G. Strontium doped hydroxyapatite film formed by micro-arc oxidation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2009. [DOI: 10.1016/j.msec.2008.12.018] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Isolation, characterisation and osteogenic potential of human bone marrow stromal cells derived from the medullary cavity of the femur. ACTA ACUST UNITED AC 2008; 92:97-103. [DOI: 10.1007/s12306-008-0057-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2008] [Accepted: 09/02/2008] [Indexed: 12/12/2022]
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Tailoring the surface properties of Ti6Al4V by controlled chemical oxidation. Biomaterials 2008; 29:1285-98. [DOI: 10.1016/j.biomaterials.2007.11.040] [Citation(s) in RCA: 180] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2007] [Accepted: 11/24/2007] [Indexed: 11/20/2022]
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Streicher RM, Schmidt M, Fiorito S. Nanosurfaces and nanostructures for artificial orthopedic implants. Nanomedicine (Lond) 2008; 2:861-74. [PMID: 18095851 DOI: 10.2217/17435889.2.6.861] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Nanomaterials and structures, such as nanoparticles, nanofibers, nanosurfaces, nanocoatings, nanoscaffolds and nanocomposites, are considered for various applications in orthopedics and traumatology. This review looks at proposed nanotechnology inspired applications for implants from the perspective of the orthopedic industry. Investigations support consistently the theory that most nanomaterials in various physical forms are able to enhance the cell response selectively for biological tissue integration or increase the strength and wear resistance of current orthopedic materials. At this stage, most of the studies are at the laboratory scale or in early in vivo testing. Significant basic and applied research and development is needed to realize their full clinical potential and biological, manufacturing, economic and regulatory issues have to be addressed. Nevertheless, a crucial factor for success is well-coordinated multimethod and multidiscipline teamwork with profound industrial and medical expertise.
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