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Highly Segregated Biocomposite Membrane as a Functionally Graded Template for Periodontal Tissue Regeneration. MEMBRANES 2021; 11:membranes11090667. [PMID: 34564484 PMCID: PMC8469372 DOI: 10.3390/membranes11090667] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/19/2021] [Accepted: 08/25/2021] [Indexed: 11/16/2022]
Abstract
Guided tissue regeneration (GTR) membranes are used for treating chronic periodontal lesions with the aim of regenerating lost periodontal attachment. Spatially designed functionally graded bioactive membranes with surface core layers have been proposed as the next generation of GTR membranes. Composite formulations of biopolymer and bioceramic have the potential to meet these criteria. Chitosan has emerged as a well-known biopolymer for use in tissue engineering applications due to its properties of degradation, cytotoxicity and antimicrobial nature. Hydroxyapatite is an essential component of the mineral phase of bone. This study developed a GTR membrane with an ideal chitosan to hydroxyapatite ratio with adequate molecular weight. Membranes were fabricated using solvent casting with low and medium molecular weights of chitosan. They were rigorously characterised with scanning electron microscopy, Fourier transform infrared spectroscopy in conjunction with photoacoustic sampling accessory (FTIR-PAS), swelling ratio, degradation profile, mechanical tensile testing and cytotoxicity using human osteosarcoma and mesenchymal progenitor cells. Scanning electron microscopy showed two different features with 70% HA at the bottom surface packed tightly together, with high distinction of CH from HA. FTIR showed distinct chitosan dominance on top and hydroxyapatite on the bottom surface. Membranes with medium molecular weight showed higher swelling and longer degradation profile as compared to low molecular weight. Cytotoxicity results indicated that the low molecular weight membrane with 30% chitosan and 70% hydroxyapatite showed higher viability with time. Results suggest that this highly segregated bilayer membrane shows promising potential to be adapted as a surface layer whilst constructing a functionally graded GTR membrane on its own and for other biomedical applications.
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Wey K, Schirrmann R, Diesing D, Lang S, Brandau S, Hansen S, Epple M. Coating of cochlear implant electrodes with bioactive DNA-loaded calcium phosphate nanoparticles for the local transfection of stimulatory proteins. Biomaterials 2021; 276:121009. [PMID: 34280824 DOI: 10.1016/j.biomaterials.2021.121009] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 06/23/2021] [Accepted: 07/02/2021] [Indexed: 12/12/2022]
Abstract
Calcium phosphate nanoparticles were loaded with nucleic acids to enhance the on-growth of tissue to a cochlear implant electrode. The nanoparticle deposition on a metallic electrode surface is possible by electrophoretic deposition (EPD) or layer-by-layer deposition (LbL). Impedance spectroscopy showed that the coating layer did not interrupt the electrical conductance at physiological frequencies and beyond (1-40,000 Hz). The transfection was demonstrated with the model cell lines HeLa and 3T3 as well as with primary explanted spiral ganglion neurons (rat) with the model protein enhanced green fluorescent protein (EGFP). The expression of the functional protein brain-derived neurotrophic factor (BDNF) was also shown. Thus, a coating of inner-ear cochlear implant electrodes with nanoparticles that carry nucleic acids will enhance the ongrowth of spiral ganglion cell axons for an improved transmission of electrical pulses.
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Affiliation(s)
- Karolin Wey
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany
| | - Ronja Schirrmann
- Department of Otorhinolaryngology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Detlef Diesing
- Physical Chemistry, University of Duisburg-Essen, Essen, Germany
| | - Stephan Lang
- Department of Otorhinolaryngology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Sven Brandau
- Department of Otorhinolaryngology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Stefan Hansen
- Department of Otorhinolaryngology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Matthias Epple
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany.
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3
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Systematic Review and Meta-Analysis of the Effectiveness of Calcium-Phosphate Coating on the Osseointegration of Titanium Implants. MATERIALS 2021; 14:ma14113015. [PMID: 34199366 PMCID: PMC8199522 DOI: 10.3390/ma14113015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/22/2021] [Accepted: 05/26/2021] [Indexed: 12/09/2022]
Abstract
Ca-P coatings on Ti implants have demonstrated good osseointegration capability due to their similarity to bone mineral matter. Three databases (PubMed, Embase, and Web of Science) were searched electronically in February 2021 for preclinical studies in unmodified experimental animals, with at least four weeks of follow-up, measuring bone-to-implant contact (BIC). Although 107 studies were found in the initial search, only eight experimental preclinical studies were included. Adverse events were selected by two independent investigators. The risk of bias assessment of the selected studies was evaluated using the Cochrane Collaboration Tool. Finally, a meta-analysis of the results found no statistical significance between implants coated with Ca-P and implants with etched conventional surfaces (difference of means, random effects: 5.40; 99% CI: -5.85, 16.65). With the limitations of the present review, Ca-P-coated Ti surfaces have similar osseointegration performance to conventional etched surfaces. Future well-designed studies with large samples are required to confirm our findings.
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Primus T, Zeman P, Brajer J, Kožmín P, Syrovátka Š. An Experimental Investigation of Controlled Changes in Wettability of Laser-Treated Surfaces after Various Post Treatment Methods. MATERIALS 2021; 14:ma14092228. [PMID: 33926001 PMCID: PMC8123642 DOI: 10.3390/ma14092228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 04/21/2021] [Accepted: 04/21/2021] [Indexed: 11/24/2022]
Abstract
In this paper, a quick nanosecond laser micro structuring process was employed to change the surface wettability of Ti6Al4V alloy. The same laser structuring method was used throughout, but with varying input fluence. The laser processing parameters resulted in high surface melting. After laser treatment, four post-processing methods were used, namely high vacuum, low temperature annealing, storage in a polyethylene bag, and storage in ambient air. Subsequently, the water droplet contact angle was measured over a long time period of 55 days. The results show that the sample stored in ambient air remained hydrophilic. On the other hand, the sample post-processed in a vacuum chamber behaved hydrophobically with a contact angle of approximately 150°. Other post-processing did not lead to specific wettability behavior. After wettability testing, all samples were cleaned ultrasonically in distilled water. This cleaning process led to annulation of all obtained properties through post-processing. In summary, this paper shows that it is more important to study surface chemistry than topography in terms of effects on wettability. Moreover, surface wettability can be controlled by laser structuring, post-processing, and surface cleaning.
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Affiliation(s)
- Tomáš Primus
- Department of Production Machines and Equipment, Faculty of Mechanical Engineering, Czech Technical University in Prague, 166 07 Prague, Czech Republic; (P.Z.); (J.B.)
- Correspondence: ; Tel.: +420-221990980
| | - Pavel Zeman
- Department of Production Machines and Equipment, Faculty of Mechanical Engineering, Czech Technical University in Prague, 166 07 Prague, Czech Republic; (P.Z.); (J.B.)
| | - Jan Brajer
- Department of Production Machines and Equipment, Faculty of Mechanical Engineering, Czech Technical University in Prague, 166 07 Prague, Czech Republic; (P.Z.); (J.B.)
| | - Pavel Kožmín
- Hofmeister s. r. o., 301 00 Plzeň, Czech Republic; (P.K.); (Š.S.)
| | - Šimon Syrovátka
- Hofmeister s. r. o., 301 00 Plzeň, Czech Republic; (P.K.); (Š.S.)
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Krishnadath DC, Ruan W, Yang H, Liu J, Zhou X. Influence of low modulus Co-Zr alloys surface modification on protein adsorption and MC3T3-E1, NIH3T3 and RAW264.7 cell behaviour. J Biomater Appl 2020; 35:1061-1070. [PMID: 33135572 DOI: 10.1177/0885328220969558] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Three types of Co-xZr (x = 5, 7.5, and 10 wt.%) were treated with hydroxyapatite (HA) and used as an object to investigate the effect of HA coating on the surface and biocompatibility of Co-xZr alloys. And the protein adsorption and the subsequent biological behaviour of osteoblast, fibroblast and macrophages were also investigated. The surface microstructure and wettability were assessed by scanning electron microscopy (SEM) and static angle profilometer. To evaluate the biocompatibility of Co-xZr and Co-xZr-HA, we quantified plasma proteins adsorption by bicinchoninic acid assay (BCA), cytotoxicity and cell proliferation by cell counting kit-8 (CCK-8) and scanning electron microscopy (SEM). The results indicated that Co-xZr-HA alloy surfaces were more hydrophilic and had higher affinity to plasma proteins. Higher protein concentrations were found adsorbed onto Co-7.5Zr-HA and Co-10Zr-HA alloys. Cytotoxicity analysis indicated that HA coating improved the biocompatibility of Co-xZr alloys. Furthermore, the comparable results of co-incubation of Co-xZr-HA alloys with cells reveal cellular attachments to HA surfaces. HA was successfully formed on Co-xZr alloys and modified the surface structure and biocompatibility of the alloys. Co-10Zr-HA and Co-7.5Zr-HA had the most favourable properties and cytocompatibility, and therefore can be potentially used for dental implants.
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Affiliation(s)
- Dewi Chrystal Krishnadath
- Department of Prosthodontics, Center of Stomatology, Xiangya Hospital, Central South University, Changsha, PR China
| | - Wei Ruan
- Department of Anesthesiology, Anesthesia Research Institute, The Second Xiangya Hospital, Central South University, Changsha, PR China
| | - Hailin Yang
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, PR China
| | - Jue Liu
- Hunan Province Key Laboratory of Engineering Rheology, Central South University of Forestry and Technology, Changsha, PR China
| | - Xiongwen Zhou
- Department of Prosthodontics, Center of Stomatology, Xiangya Hospital, Central South University, Changsha, PR China
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Behera RR, Das A, Hasan A, Pamu D, Pandey LM, Sankar MR. Effect of TiO 2 addition on adhesion and biological behavior of BCP-TiO 2 composite films deposited by magnetron sputtering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 114:111033. [PMID: 32994014 DOI: 10.1016/j.msec.2020.111033] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 04/20/2020] [Accepted: 04/28/2020] [Indexed: 12/14/2022]
Abstract
The present investigation focuses on the deposition of biphasic calcium phosphate (BCP) and titania (TiO2) composite films on Ti-6Al-4V substrates using radio frequency (RF) magnetron sputtering. Three different compositions such as 100% BCP, 25% TiO2-75% BCP and 50% TiO2-50% BCP films were fabricated, and the physical, mechanical and biological behaviors of the films were analyzed. Post deposition, the films were annealed at 700 °C for 2 h to induce the crystallinity and to study its effect on different properties. The wettability was found to be 95°(±3°) for 100% BCP, 73°(±2°) for 25% TiO2-75% BCP and 35°(±1°) for 50% TiO2-50% BCP films, indicating improvement in wettability with an increase of TiO2 weight percent in the composite films. The value of critical load (Lc2) for 100 BCP film improved from 8.7 N to 14.8 N (25 TiO2-BCP) and >19 N (50 TiO2-BCP film), indicating improvement in bonding strength with TiO2 addition. The fetal bovine serum (FBS) adsorption decreased from 7.11 ± 0.25 to 4.42 ± 0.17 μg/cm2 with TiO2 weight percent from 0 to 50%. Cell adhesion and proliferation significantly improved in 100% BCP, 25% TiO2-75% BCP and 50% TiO2-50% BCP films as compared to uncoated Ti-6Al-4V. The maximum cell proliferation was found on the surface of 50% TiO2-50% BCP film (210.1 ± 6.5%) after 6 days of incubation. However, after annealing all the films exhibited less cell adhesion and cytocompatibility presumably due to change in composition. Globular apatite structure was observed on all modified surfaces after 7 days immersion in simulated body fluid (SBF); however, the growth rate was higher for 50 TiO2-BCP films. All these results revealed that the addition of TiO2 in BCP film (without annealing) is advantageous for improving the bonding strength as well as the bioactivity of implants, which can be used for long-term dental and orthopedic applications.
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Affiliation(s)
- R R Behera
- Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Assam 781039, India; School of Mechanical Engineering, Kalinga Institute of Industrial Technology, Bhubaneswar, Odisha 751024, India.
| | - A Das
- Department of Physics, Indian Institute of Technology Guwahati, Assam 781039, India.
| | - A Hasan
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Assam 781039, India.
| | - D Pamu
- Department of Physics, Indian Institute of Technology Guwahati, Assam 781039, India.
| | - L M Pandey
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Assam 781039, India.
| | - M R Sankar
- Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Assam 781039, India; Department of Mechanical Engineering, Indian Institute of Technology Tirupati, Andhra Pradesh 517506, India.
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Behera RR, Das A, Pamu D, Pandey LM, Sankar MR. Mechano-tribological properties and in vitro bioactivity of biphasic calcium phosphate coating on Ti-6Al-4V. J Mech Behav Biomed Mater 2018; 86:143-157. [PMID: 29986289 DOI: 10.1016/j.jmbbm.2018.06.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 06/08/2018] [Accepted: 06/12/2018] [Indexed: 12/11/2022]
Abstract
Biphasic calcium phosphate (BCP) consists of hydroxyapatite (HA) and beta-tricalcium phosphate (β-TCP). BCP is mainly used in artificial tooth and bone implants due to higher protein adsorption and osteoinductivity compared to HA alone. Although, many studies have been investigated on radio frequency (RF) magnetron sputtering of HA on Ti and its alloy, however, limited studies are available on BCP coating by this process and its bioactivity and adhesion behavior. Thus, in order to obtain a better understanding and applications of BCP films, RF magnetron sputtering is used to deposit BCP films on Ti-6Al-4V in the present study. The effect of film thickness on wettability, mechanical properties and in vitro bioactivity at a particular set of sputtering parameters are investigated. BCP film thickness of 400 nm, 700 nm and 1000 nm are obtained when sputtered for 4 h, 6 h and 8 h, respectively. Although the phase compositions are almost same for all films, the surface roughness values varies around 112-153 nm with rise in film thickness. This in turn enhances hydrophilicity in accordance to Wenzel relation as the contact angle decreases from 89.6 ± 2° to 61.2 ± 2°. It is found that the 1000 nm film possess highest micro-hardness and surface scratch resistance. No cracking of film up to scratch load of 2.3 N and no significant delamination up to load of 7.8 N are observed, indicating very good adhesion between BCP films and Ti-6Al-4V substrate. There is a great improvement in wt% apatite layer formation on all films when dipped in simulated body fluid (SBF) for 14 days. Among these, 1000 nm sputtered film results the highest increase in wt% apatite layer from 44.87% to 86.7%. The apatite layer possess small globular as well as elliptical structure are nucleated and grew on all the BCP films. Thus, sputtering of BCP films improves wettability, mechanical properties as well as bioactivity of Ti-6Al-4V, which can be applied for orthopedic implants.
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Affiliation(s)
- R R Behera
- Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Assam 781039, India.
| | - A Das
- Department of Physics, Indian Institute of Technology Guwahati, Assam 781039, India.
| | - D Pamu
- Department of Physics, Indian Institute of Technology Guwahati, Assam 781039, India.
| | - L M Pandey
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Assam 781039, India.
| | - M R Sankar
- Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Assam 781039, India.
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Cardoso MV, de Rycker J, Chaudhari A, Coutinho E, Yoshida Y, Van Meerbeek B, Mesquita MF, da Silva WJ, Yoshihara K, Vandamme K, Duyck J. Titanium implant functionalization with phosphate-containing polymers may favour in vivo osseointegration. J Clin Periodontol 2017; 44:950-960. [DOI: 10.1111/jcpe.12736] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/22/2017] [Indexed: 01/22/2023]
Affiliation(s)
- Marcio V. Cardoso
- Department of Oral Health Sciences & Dental Clinic; Biomaterials - Biomat & Restorative Dentistry; KU Leuven & University Hospitals Leuven; Leuven Belgium
| | - Judith de Rycker
- Department of Oral Health Sciences & Dental Clinic; Biomaterials - Biomat & Restorative Dentistry; KU Leuven & University Hospitals Leuven; Leuven Belgium
| | - Amol Chaudhari
- Department of Oral Health Sciences & Dental Clinic; Biomaterials - Biomat & Restorative Dentistry; KU Leuven & University Hospitals Leuven; Leuven Belgium
| | - Eduardo Coutinho
- Department of Oral Health Sciences & Dental Clinic; Biomaterials - Biomat & Restorative Dentistry; KU Leuven & University Hospitals Leuven; Leuven Belgium
- School of Dentistry; Fluminense Federal University; Nova Friburgo Brazil
| | - Yasuhiro Yoshida
- Department of Biomaterials; Graduate School of Medicine, Dentistry and Pharmaceutical Sciences; Okayama Japan
| | - Bart Van Meerbeek
- Department of Oral Health Sciences & Dental Clinic; Biomaterials - Biomat & Restorative Dentistry; KU Leuven & University Hospitals Leuven; Leuven Belgium
| | - Marcelo F. Mesquita
- Department of Oral Health Sciences & Dental Clinic; Biomaterials - Biomat & Restorative Dentistry; KU Leuven & University Hospitals Leuven; Leuven Belgium
- Department of Prosthodontics and Periodontology; Piracicaba Dental School; State University of Campinas; Piracicaba Brazil
| | - Wander J. da Silva
- Department of Oral Health Sciences & Dental Clinic; Biomaterials - Biomat & Restorative Dentistry; KU Leuven & University Hospitals Leuven; Leuven Belgium
- Department of Prosthodontics and Periodontology; Piracicaba Dental School; State University of Campinas; Piracicaba Brazil
| | - Kumiko Yoshihara
- Center for Innovative Clinical Medicine; Okayama University Hospital; Okayama Japan
| | - Katleen Vandamme
- Department of Oral Health Sciences & Dental Clinic; Biomaterials - Biomat & Restorative Dentistry; KU Leuven & University Hospitals Leuven; Leuven Belgium
| | - Joke Duyck
- Department of Oral Health Sciences & Dental Clinic; Biomaterials - Biomat & Restorative Dentistry; KU Leuven & University Hospitals Leuven; Leuven Belgium
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9
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Zhang CX, Falentin-Daudre C, Migonney V. Titanium alloy surface coatings using poly(sodium styrene sulfonate) and poly(acrylic acid). Biomed Mater Eng 2017; 27:657-668. [DOI: 10.3233/bme-161616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Cong Xiao Zhang
- Department of Stomatology, The First Hospital of JiLin University, 71 XinMin Street, Changchun, JiLin Province, China
| | - Celine Falentin-Daudre
- LBPS, CSPBAT, UMR CNRS 7244, Université Paris 13, 99 Avenue JB Clément, Villetaneuse, France
| | - Veronique Migonney
- LBPS, CSPBAT, UMR CNRS 7244, Université Paris 13, 99 Avenue JB Clément, Villetaneuse, France
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Chen W, Tian B, Lei Y, Ke QF, Zhu ZA, Guo YP. Hydroxyapatite coatings with oriented nanoplate and nanorod arrays: Fabrication, morphology, cytocompatibility and osteogenic differentiation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 67:395-408. [DOI: 10.1016/j.msec.2016.04.106] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2015] [Revised: 03/28/2016] [Accepted: 04/27/2016] [Indexed: 11/30/2022]
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Aljabo A, Abou Neel EA, Knowles JC, Young AM. Development of dental composites with reactive fillers that promote precipitation of antibacterial-hydroxyapatite layers. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 60:285-292. [PMID: 26706532 DOI: 10.1016/j.msec.2015.11.047] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 10/23/2015] [Accepted: 11/16/2015] [Indexed: 10/22/2022]
Abstract
The study aim was to develop light-curable, high strength dental composites that would release calcium phosphate and chlorhexidine (CHX) but additionally promote surface hydroxyapatite/CHX co-precipitation in simulated body fluid (SBF). 80 wt.% urethane dimethacrylate based liquid was mixed with glass fillers containing 10 wt.% CHX and 0, 10, 20 or 40 wt.% reactive mono- and tricalcium phosphate (CaP). Surface hydroxyapatite layer thickness/coverage from SEM images, Ca/Si ratio from EDX and hydroxyapatite Raman peak intensities were all proportional to both time in SBF and CaP wt.% in the filler. Hydroxyapatite was, however, difficult to detect by XRD until 4 weeks. XRD peak width and SEM images suggested this was due to the very small size (~10 nm) of the hydroxyapatite crystallites. Precipitate mass at 12 weeks was 22 wt.% of the sample CaP total mass irrespective of CaP wt.% and up to 7 wt.% of the specimen. Early diffusion controlled CHX release, assessed by UV spectrometry, was proportional to CaP and twice as fast in water compared with SBF. After 1 week, CHX continued to diffuse into water but in SBF, became entrapped within the precipitating hydroxyapatite layer. At 12 weeks CHX formed 5 to 15% of the HA layer with 10 to 40 wt.% CaP respectively. Despite linear decline of strength and modulus in 4 weeks from 160 to 101 MPa and 4 to 2.4 GPa, respectively, upon raising CaP content, all values were still within the range expected for commercial composites. The high strength, hydroxyapatite precipitation and surface antibacterial accumulation should reduce tooth restoration failure due to fracture, aid demineralised dentine repair and prevent subsurface carious disease respectively.
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Affiliation(s)
- Anas Aljabo
- UCL Eastman Dental Institute, Biomaterials & Tissue Engineering Division, 256 Gray's Inn Road, London WC1X 8LD, United Kingdom
| | - Ensanya A Abou Neel
- UCL Eastman Dental Institute, Biomaterials & Tissue Engineering Division, 256 Gray's Inn Road, London WC1X 8LD, United Kingdom; Division of Biomaterials, Operative Dentistry Department, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia; Biomaterials Department, Faculty of Dentistry, Tanta University, Tanta, Egypt
| | - Jonathan C Knowles
- UCL Eastman Dental Institute, Biomaterials & Tissue Engineering Division, 256 Gray's Inn Road, London WC1X 8LD, United Kingdom
| | - Anne M Young
- UCL Eastman Dental Institute, Biomaterials & Tissue Engineering Division, 256 Gray's Inn Road, London WC1X 8LD, United Kingdom
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12
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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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13
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Xu J, Liu L, Munroe P, Xie ZH. Promoting bone-like apatite formation on titanium alloys through nanocrystalline tantalum nitride coatings. J Mater Chem B 2015; 3:4082-4094. [DOI: 10.1039/c5tb00236b] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The study aims to advance the applicability of titanium alloys as bone implant materials by tackling some important aspects of surface robustness and bioactivity.
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Affiliation(s)
- Jiang Xu
- Department of Material Science and Engineering
- Nanjing University of Aeronautics and Astronautics
- Nanjing 210016
- P. R. China
- School of Mechanical & Electrical Engineering
| | - Linlin Liu
- Department of Material Science and Engineering
- Nanjing University of Aeronautics and Astronautics
- Nanjing 210016
- P. R. China
| | - Paul Munroe
- School of Materials Science and Engineering
- University of New South Wales
- Australia
| | - Zong-Han Xie
- School of Mechanical Engineering
- University of Adelaide
- Australia
- School of Engineering
- Edith Cowan University
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14
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Ho YH, Vora HD, Dahotre NB. Laser surface modification of AZ31B Mg alloy for bio-wettability. J Biomater Appl 2014; 29:915-28. [DOI: 10.1177/0885328214551156] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Magnesium alloys are the potential degradable materials for load-bearing implant application due to their comparable mechanical properties to human bone, excellent bioactivity, and in vivo non-toxicity. However, for a successful load-bearing implant, the surface of bio-implant must allow protein absorption and layer formation under physiological environment that can assist the cell/osteoblast growth. In this regard, surface wettability of bio-implant plays a key role to dictate the quantity of protein absorption. In light of this, the main objective of the present study was to produce favorable bio-wettability condition of AZ31B Mg alloy bio-implant surface via laser surface modification technique under various laser processing conditions. In the present efforts, the influence of laser surface modification on AZ31B Mg alloy surface on resultant bio-wettability was investigated via contact-angle measurements and the co-relationships among microstructure (grain size), surface roughness, surface energy, and surface chemical composition were established. In addition, the laser surface modification technique was simulated by computational (thermal) model to facilitate the prediction of temperature and its resultant cooling/solidification rates under various laser processing conditions for correlating with their corresponding composition and phase evolution. These predicted thermal properties were later used to correlate with the corresponding microstructure, chemical composition, and phase evolution via experimental analyses (X-ray diffractometer, scanning electron microscope, energy-dispersive spectroscopy).
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Affiliation(s)
- Yee-Hsien Ho
- Laboratory for Laser Aided Additive and Subtractive Manufacturing, Department of Materials Science and Engineering, University of North Texas, Denton, TX, USA
| | - Hitesh D Vora
- Laboratory for Laser Aided Additive and Subtractive Manufacturing, Department of Materials Science and Engineering, University of North Texas, Denton, TX, USA
| | - Narendra B Dahotre
- Laboratory for Laser Aided Additive and Subtractive Manufacturing, Department of Materials Science and Engineering, University of North Texas, Denton, TX, USA
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15
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Özçelik H, Padeste C, Hasirci V. Systematically organized nanopillar arrays reveal differences in adhesion and alignment properties of BMSC and Saos-2 cells. Colloids Surf B Biointerfaces 2014; 119:71-81. [DOI: 10.1016/j.colsurfb.2014.03.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 03/06/2014] [Accepted: 03/10/2014] [Indexed: 10/25/2022]
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16
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Surmenev RA, Surmeneva MA, Ivanova AA. Significance of calcium phosphate coatings for the enhancement of new bone osteogenesis--a review. Acta Biomater 2014; 10:557-79. [PMID: 24211734 DOI: 10.1016/j.actbio.2013.10.036] [Citation(s) in RCA: 317] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 10/25/2013] [Accepted: 10/29/2013] [Indexed: 12/15/2022]
Abstract
A systematic analysis of results available from in vitro, in vivo and clinical trials on the effects of biocompatible calcium phosphate (CaP) coatings is presented. An overview of the most frequently used methods to prepare CaP-based coatings was conducted. Dense, homogeneous, highly adherent and biocompatible CaP or hybrid organic/inorganic CaP coatings with tailored properties can be deposited. It has been demonstrated that CaP coatings have a significant effect on the bone regeneration process. In vitro experiments using different cells (e.g. SaOS-2, human mesenchymal stem cells and osteoblast-like cells) have revealed that CaP coatings enhance cellular adhesion, proliferation and differentiation to promote bone regeneration. However, in vivo, the exact mechanism of osteogenesis in response to CaP coatings is unclear; indeed, there are conflicting reports of the effectiveness of CaP coatings, with results ranging from highly effective to no significant or even negative effects. This review therefore highlights progress in CaP coatings for orthopaedic implants and discusses the future research and use of these devices. Currently, an exciting area of research is in bioactive hybrid composite CaP-based coatings containing both inorganic (CaP coating) and organic (collagen, bone morphogenetic proteins, arginylglycylaspartic acid etc.) components with the aim of promoting tissue ingrowth and vascularization. Further investigations are necessary to reveal the relative influences of implant design, surgical procedure, and coating characteristics (thickness, structure, topography, porosity, wettability etc.) on the long-term clinical effects of hybrid CaP coatings. In addition to commercially available plasma spraying, other effective routes for the fabrication of hybrid CaP coatings for clinical use still need to be determined and current progress is discussed.
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Affiliation(s)
- Roman A Surmenev
- Department of Theoretical and Experimental Physics, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia; Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB, 70569 Stuttgart, Germany.
| | - Maria A Surmeneva
- Department of Theoretical and Experimental Physics, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia
| | - Anna A Ivanova
- Department of Theoretical and Experimental Physics, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia
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17
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Huang L, Zhang T, Liaw PK, He W. Macrophage responses to a Zr-based bulk metallic glass. J Biomed Mater Res A 2013; 102:3369-78. [DOI: 10.1002/jbm.a.35009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Revised: 10/07/2013] [Accepted: 10/11/2013] [Indexed: 01/25/2023]
Affiliation(s)
- Lu Huang
- Department of Materials Science and Engineering; The University of Tennessee; Knoxville Tennessee 37996-2100
| | - Tao Zhang
- Key Laboratory of Aerospace Materials and Performance (Ministry of Education); School of Materials Science and Engineering; Department of Materials Science and Engineering, Beihang University; Beijing 100191 China
| | - Peter K. Liaw
- Department of Materials Science and Engineering; The University of Tennessee; Knoxville Tennessee 37996-2100
| | - Wei He
- Department of Materials Science and Engineering; The University of Tennessee; Knoxville Tennessee 37996-2100
- Department of Mechanical; Aerospace and Biomedical Engineering; The University of Tennessee; Knoxville Tennessee 37996-2100
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18
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Laser Induced Nitrogen Enhanced Titanium Surfaces for Improved Osseo-Integration. Ann Biomed Eng 2013; 42:50-61. [DOI: 10.1007/s10439-013-0898-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Accepted: 08/14/2013] [Indexed: 10/26/2022]
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19
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Chen F, Zhang D, Yang Q, Yong J, Du G, Si J, Yun F, Hou X. Bioinspired wetting surface via laser microfabrication. ACS APPLIED MATERIALS & INTERFACES 2013; 5:6777-92. [PMID: 23865499 DOI: 10.1021/am401677z] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Bioinspired special wettibilities including superhydrophobicity and tunable adhesive force have drawn considerable attention because of their significant potential for fundamental research and practical applications. This review summarizes recent progress in the development of bioinspired wetting surfaces via laser microfabrication, with a focus on controllable, biomimetic, and switchable wetting surfaces, as well as their applications in biology, microfluidic, and paper-based devices, all of which demonstrate the ability of laser microfabrication in producing various multiscale structures and its adaptation in a great variety of materials. In particular, compared to other techniques, laser microfabrication can realize special modulation ranging from superhydrophilic to superhydrophobic without the assistance of fluorination, allowing much more freedom to achieve complex multiple-wettability integration. The current challenges and future research prospects of this rapidly developing field are also being discussed. These approaches open the intriguing possibility of the development of advanced interfaces equipped with the integration of more functionalities.
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Affiliation(s)
- Feng Chen
- State Key Laboratory for Manufacturing Systems Engineering & Key Laboratory of Photonics Technology for Information of Shaanxi Province, School of Electronics & Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
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20
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Dorozhkin SV. Calcium orthophosphate coatings, films and layers. Prog Biomater 2012; 1:1. [PMID: 29470670 PMCID: PMC5120666 DOI: 10.1186/2194-0517-1-1] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2012] [Accepted: 06/14/2012] [Indexed: 11/16/2022] Open
Abstract
In surgical disciplines, where bones have to be repaired, augmented or improved, bone substitutes are essential. Therefore, an interest has dramatically increased in application of synthetic bone grafts. As various interactions among cells, surrounding tissues and implanted biomaterials always occur at the interfaces, the surface properties of the implants are of the paramount importance in determining both the biological response to implants and the material response to the physiological conditions. Hence, a surface engineering is aimed to modify both the biomaterials, themselves, and biological responses through introducing desirable changes to the surface properties of the implants but still maintaining their bulk mechanical properties. To fulfill these requirements, a special class of artificial bone grafts has been introduced in 1976. It is composed of various mechanically stable (therefore, suitable for load bearing applications) biomaterials and/or bio-devices with calcium orthophosphate coatings, films and layers on their surfaces to both improve interactions with the surrounding tissues and provide an adequate bonding to bones. Many production techniques of calcium orthophosphate coatings, films and layers have been already invented and new promising techniques are continuously investigated. These specialized 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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21
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Lv X, Lin X, Hu J, Gao B, Huang W. Phase evolution in calcium phosphate coatings obtained by in situ laser cladding. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012. [DOI: 10.1016/j.msec.2012.02.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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22
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Mehdikhani-Nahrkhalaji M, Fathi MH, Mortazavi V, Mousavi SB, Hashemi-Beni B, Razavi SM. Novel nanocomposite coating for dental implant applications in vitro and in vivo evaluation. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:485-495. [PMID: 22127403 DOI: 10.1007/s10856-011-4507-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2011] [Accepted: 11/17/2011] [Indexed: 05/31/2023]
Abstract
This study aimed at preparation and in vitro and in vivo evaluation of novel bioactive, biodegradable, and antibacterial nanocomposite coating for the improvement of stem cells attachment and antibacterial activity as a candidate for dental implant applications. Poly (lactide-co-glycolide)/bioactive glass/hydroxyapatite (PBGHA) nanocomposite coating was prepared via solvent casting process. The nanoparticle amounts of 10, 15, and 20 weight percent (wt%) were chosen in order to determine the optimum amount of nanoparticles suitable for preparing an uniform coating. Bioactivity and degradation of the coating with an optimum amount of nanoparticles were evaluated by immersing the prepared samples in simulated body fluid and phosphate buffer saline (PBS), respectively. The effect of nanocomposite coating on the attachment and viability of human adipose-derived stem cells (hASCs) was investigated. Kirschner wires (K-wires) of stainless steel were coated with the PBGHA nanocomposite coating, and mechanical stability of the coating was studied during intramedullary implantation into rabbit tibiae. The results showed that using 10 wt% nanoparticles (5 wt% HA and 5 wt% BG) in the nanocomposite could provide the desired uniform coating. The study of in vitro bioactivity showed rapid formation of bone-like apatite on the PBGHA coating. It was degraded considerably after about 60 days of immersion in PBS. The hASCs showed excellent attachment and viability on the coating. PBGHA coating remained stable on the K-wires with a minimum of 96% of the original coating mass. It was concluded that PBGHA nanocomposite coating provides an ideal surface for the stem cells attachment and viability. In addition, it could induce antibacterial activity, simultaneously.
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Wang H, Guan S, Wang Y, Liu H, Wang H, Wang L, Ren C, Zhu S, Chen K. In vivo degradation behavior of Ca-deficient hydroxyapatite coated Mg–Zn–Ca alloy for bone implant application. Colloids Surf B Biointerfaces 2011; 88:254-9. [DOI: 10.1016/j.colsurfb.2011.06.040] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Revised: 06/24/2011] [Accepted: 06/28/2011] [Indexed: 11/30/2022]
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24
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Tavangar A, Tan B, Venkatakrishnan K. Synthesis of bio-functionalized three-dimensional titania nanofibrous structures using femtosecond laser ablation. Acta Biomater 2011; 7:2726-32. [PMID: 21354476 DOI: 10.1016/j.actbio.2011.02.020] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2010] [Revised: 02/08/2011] [Accepted: 02/13/2011] [Indexed: 11/26/2022]
Abstract
The primary objective of current tissue regeneration research is to synthesize nano-based platforms that can induce guided, controlled, and rapid healing. Titanium nanotubes have been extensively considered as a new biomaterial for biosensors, implants, cell growth, tissue engineering, and drug delivery systems. However, due to their one-dimensional structure and chemical inertness, cell adhesion to nanotubes is poor. Therefore, further surface modification is required to enhance nanotube-cell interaction. Although there have been a considerable number of studies on growing titanium nanotubes, synthesizing a three-dimensional (3-D) nano-architecture which can act as a growth support platform for bone and stem cells has not been reported so far. Therefore, we present a novel technique to synthesize and grow 3-D titania interwoven nanofibrous structures on a titanium substrate using femtosecond laser irradiation under ambient conditions. This surface architecture incorporate the functions of 3-D nano-scaled topography and modified chemical properties to improve osseointegration while at the same time leaving space to deliver other functional agents. The results indicate that laser pulse repetition can control the density and pore size of engineered nanofibrous structures. In vitro experiments reveal that the titania nanofibrous architecture possesses excellent bioactivity and can induce rapid, uniform, and controllable bone-like apatite precipitation once immersed in simulated body fluid (SBF). This approach to synthesizing 3-D titania nanofibrous structures suggests considerable promise for the promotion of Ti interfacial properties to develop new functional biomaterials for various biomedical applications.
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Paital SR, Bunce N, Nandwana P, Honrao C, Nag S, He W, Banerjee R, Dahotre NB. Laser surface modification for synthesis of textured bioactive and biocompatible Ca-P coatings on Ti-6Al-4V. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:1393-1406. [PMID: 21526409 DOI: 10.1007/s10856-011-4321-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2011] [Accepted: 04/07/2011] [Indexed: 05/30/2023]
Abstract
A textured calcium phosphate based bio-ceramic coating was synthesized by continuous wave Nd:YAG laser induced direct melting of hydroxyapatite precursor on Ti-6Al-4V substrate. Two different micro-textured patterns (100 μm and 200 μm line spacing) of Ca-P based phases were fabricated by this technique to understand the alignment and focal adhesion of the bone forming cells on these surfaces. X-ray diffraction studies of the coated samples indicated the presence of CaTiO₃, α-Ca₃(PO₄)₂, Ca(OH)₂, TiO₂ (anatase) and TiO₂ (rutile) phases as a result of the intermixing between the precursor and substrate material during laser processing. A two dimensional elemental mapping of the cross-section of the coated samples exhibited the presence of higher phosphorous concentration within the coating and a thin layer of calcium concentration only at the top of the coating. Improved in vitro bioactivity and in vitro biocompatibility was observed for the laser processed samples as compared to the control.
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Affiliation(s)
- Sameer R Paital
- Department of Materials Science and Engineering, University of North Texas, Denton, TX 76207, USA
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26
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Effect of electrical polarization and composition of biphasic calcium phosphates on early stage osteoblast interactions. J Biomed Mater Res B Appl Biomater 2011; 97:306-14. [DOI: 10.1002/jbm.b.31816] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2010] [Revised: 11/16/2010] [Accepted: 12/05/2010] [Indexed: 11/07/2022]
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27
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Role of wettability and nanoroughness on interactions between osteoblast and modified silicon surfaces. Acta Biomater 2011; 7:771-8. [PMID: 20807595 DOI: 10.1016/j.actbio.2010.08.024] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2010] [Revised: 08/20/2010] [Accepted: 08/25/2010] [Indexed: 11/22/2022]
Abstract
Development of new biomaterials is a constant in regenerative medicine. A biomaterial's surface properties, such as wettability, roughness, surface energy, surface charge, chemical functionalities and composition, are determinants of cell adhesion and subsequent tissue behavior. Thus, the main aim of this study was to analyze the correlation between changes in wettability without topographical variation and the response of osteoblast-like cells. For this purpose oxidized silicon surfaces were methylated to different degrees. Additionally, the influence of nanoroughness, and the subsequent effect of hysteresis on cell behavior, was also analyzed. In this case oxidized silicon pieces were etched with caustic solutions to produce different degrees of nanoroughness. Axisymmetric drop-shape analysis and atomic force microscopy confirmed that the proposed surface treatments increased the nanometer roughness and/or the water contact angles. MG-63 osteoblast-like cells were cultured on the altered surfaces to study proliferation, and for ultrastructural analysis and immunocytochemical characterization. Increasing the nanometer surface roughness or water contact angle enhanced osteoblast behavior in terms of cell morphology, proliferation and immunophenotype, the effect provoked by methylation being more significant than that caused by nanoroughness.
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28
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Joseph B, Edwin BT, Edwin BT, Sankargane P, Raj SJ. Effect of Biomaterials in Orthopaedic Mesenchymal Stem Cell Therapy. JOURNAL OF MEDICAL SCIENCES 2010. [DOI: 10.3923/jms.2011.1.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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29
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Paital SR, He W, Dahotre NB. Laser pulse dependent micro textured calcium phosphate coatings for improved wettability and cell compatibility. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2010; 21:2187-2200. [PMID: 20464459 DOI: 10.1007/s10856-010-4085-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2009] [Accepted: 04/15/2010] [Indexed: 05/29/2023]
Abstract
Surface wettability of an implant material is an important criterion in biological response as it controls the adsorption of proteins followed by attachment of cells to its surface. Hence, micro-textured calcium phosphate coatings with four length scales were synthesized on Ti-6Al-4V substrates by a laser cladding technique and their effects on wettability and cell adhesion were systematically evaluated. Microstructure and morphological evolutions of the coatings were studied using scanning electron and light optical microscopes respectively. The surface texture of coating defined in terms of a texture parameter was correlated to its wetting behavior. The contact angle of simulated body fluid measured by a static sessile drop technique, demonstrated an increased hydrophilicity with decreasing value of texture parameter. The influence of such textures on the in vitro bioactivity and in vitro biocompatibility were studied by the immersion of the samples in simulated body fluid and mouse MC3T3-E1 osteoblast-like cell culture respectively.
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Affiliation(s)
- Sameer R Paital
- Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN 37996, USA
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30
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Dahotre NB, Paital SR, Samant AN, Daniel C. Wetting behaviour of laser synthetic surface microtextures on Ti-6Al-4V for bioapplication. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2010; 368:1863-1889. [PMID: 20308107 DOI: 10.1098/rsta.2010.0003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Wettability at the surface of an implant material plays a key role in its success as it modulates the protein adsorption and thereby influences cell attachment and tissue integration at the interface. Hence, surface engineering of implantable materials to enhance wettability to physiological fluid under in vivo conditions is an area of active research. In light of this, in the present work, laser-based optical interference and direct melting techniques were used to develop synthetic microtextures on Ti-6Al-4V alloys, and their effects on wettability were studied systematically. Improved wettability to simulated body fluid and distilled water was observed for Ca-P coatings obtained by direct melting technique. This superior wettability was attributed to both the appropriate surface chemistry and the three-dimensional surface features obtained using this technique. To assert a better control on surface texture and wettability, a three-dimensional thermal model based on COMSOL's multiphysics was employed to predict the features obtained by laser melting technique. The effect of physical texture and wetting on biocompatibility of laser-processed Ca-P coatings was evaluated in the preliminary efforts on culturing of mouse MC3T3-E1 osteoblast cells.
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Affiliation(s)
- Narendra B Dahotre
- Laboratory for Laser Materials Synthesis and Fabrication, University of Tennessee, Knoxville, TN 37996, USA.
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31
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Paital SR, Cao Z, He W, Dahotre NB. Wetting effects on
in vitro
bioactivity and
in vitro
biocompatibility of laser micro-textured Ca-P coating. Biofabrication 2010; 2:025001. [DOI: 10.1088/1758-5082/2/2/025001] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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