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Dopierała K, Knitter M, Dobrzyńska-Mizera M, Andrzejewski J, Bartkowska A, Prochaska K. Surface Functionalization of Poly(lactic acid) via Deposition of Hydroxyapatite Monolayers for Biomedical Applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:15610-15619. [PMID: 37882695 PMCID: PMC10634356 DOI: 10.1021/acs.langmuir.3c01914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 10/16/2023] [Accepted: 10/16/2023] [Indexed: 10/27/2023]
Abstract
The surface modification of poly(lactic acid) (PLA) using hydroxyapatite (HAP) particles via Langmuir-Blodgett (LB) and Langmuir-Schaefer (LS) approaches has been reported. The HAP monolayer was characterized at the air/water interface and deposited on three-dimensional (3D) printed poly(lactic acid). The deposition of HAP particles using the LS approach led to a larger surface coverage in comparison to the LB method, which produces a less uniform coating because of the aggregation of the particles. After the transfer of HAP on the PLA surface, the wettability values remained within the desired range. The presence of HAP on the surface of the polymer altered the topography and roughness in the nanoscale, as evidenced by the atomic force microscopy (AFM) images. This effect can be beneficial for the osteointegration of polymeric implants at an early stage, as well as for the reduction of the adherence of the microbial biofilm. Overall, the results suggest that the LS technique could be a promising approach for surface modification of PLA by hydroxyapatite with respective advantages in the biomedical field.
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Affiliation(s)
- Katarzyna Dopierała
- Institute
of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, 60-965 Poznań, Poland
| | - Monika Knitter
- Institute
of Material Technology, Poznan University
of Technology, Piotrowo
3, 61-138 Poznań, Poland
| | - Monika Dobrzyńska-Mizera
- Institute
of Material Technology, Poznan University
of Technology, Piotrowo
3, 61-138 Poznań, Poland
| | - Jacek Andrzejewski
- Institute
of Material Technology, Poznan University
of Technology, Piotrowo
3, 61-138 Poznań, Poland
| | - Aneta Bartkowska
- Poznan
University of Technology, Faculty of Materials Engineering and Technical
Physics, Institute of Material Science and
Engineering, Jana Pawła
II 24, 61-138 Poznań, Poland
| | - Krystyna Prochaska
- Institute
of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, 60-965 Poznań, Poland
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Elsisy M, Shayan M, Chen Y, Tillman BW, Go C, Chun Y. Assessment of mechanical and biocompatible performance of ultra-large nitinol endovascular devices fabricated via a low-energy laser joining process. J Biomater Appl 2021; 36:332-345. [PMID: 34027693 DOI: 10.1177/08853282211019517] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Nitinol is an excellent candidate material for developing various self-expanding endovascular devices due to its unique properties such as superelasticity, biocompatibility and shape memory effect. A low-energy laser joining technique suggests a high potential to create various large diameter Nitinol endovascular devices that contain complex geometries. The primary purpose of the study is to investigate the effects of laser joining process parameters with regard to the mechanical and biocompatible performance of Nitinol stents. Both the chemical composition and the microstructure of the laser-welded joints were evaluated using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). In vitro study results on cytotoxicity demonstrated that the joining condition of 8 Hz frequency and 1 kW laser power showed the highest degree of endothelial cell viability after thermal annealing in 500°C for 30 min. Also, in vitro study results showed the highest oxygen content at 0.9 kW laser power, 8 Hz frequency, and 0.3 mm spot size after the thermal annealing. Mechanical performance test results showed that the optimal condition for the highest disconnecting force was found at 1 Hz frequency and 1 kW power with 0.6 mm spot size. Two new endovascular devices have been fabricated using the optimized laser joining parameters, which have demonstrated successful device delivery and retrieval, as well as acute biocompatibility.
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Affiliation(s)
- Moataz Elsisy
- Department of Industrial engineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - Mahdis Shayan
- Department of Cardiothoracic Surgery, Stanford University, Palo Alto, CA, USA
| | - Yanfei Chen
- Department of Industrial engineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - Bryan W Tillman
- Division of Vascular Diseases and Surgery, Department of Surgery, The Ohio State University, Columbus, OH, USA
| | - Catherine Go
- Division of Vascular Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Youngjae Chun
- Department of Industrial engineering, University of Pittsburgh, Pittsburgh, PA, USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA
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Hydroxyapatite and β-TCP modified PMMA-TiO 2 and PMMA-ZrO 2 coatings for bioactive corrosion protection of Ti6Al4V implants. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 116:111149. [PMID: 32806280 DOI: 10.1016/j.msec.2020.111149] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/02/2020] [Accepted: 05/31/2020] [Indexed: 12/23/2022]
Abstract
Organic-inorganic hybrid coatings deposited on different types of metallic alloys have shown outstanding anticorrosive performance. The incorporation of osteoconductive additives such as hydroxyapatite (HA) and β-tricalcium phosphate (β-TCP) into organic-inorganic hybrid coatings is promising to improve the osseointegration and corrosion resistance of Ti6Al4V alloys, which are the most widely used metallic orthopedic and dental implant materials today. Therefore, this study evaluated the capability of poly(methyl methacrylate) (PMMA)-TiO2 and PMMA-ZrO2 hybrid coatings modified with HA and β-TCP to act as bioactive and corrosion protection coatings for Ti6Al4V alloys. In terms of cell growth and mineralization, osteoblast viability, Ca+2 deposition and alkaline phosphatase assays revealed a significant improvement for the HA and β-TCP modified coatings, compared to the bare alloy. This can be explained by an increase in nanoscale roughness and associated higher surface free energy, which lead to enhanced protein adsorption to promote osteoblast attachment and functions on the coatings. The effect of HA and β-TCP additives on the anticorrosive efficiency was studied by electrochemical impedance spectroscopy (EIS) in a simulated body fluid (SBF) solution. The coatings presented a low-frequency impedance modulus of up to 430 GΩ cm2, 5 decades higher than the bare Ti6Al4V alloy. These findings provide clear evidence of the beneficial role of HA and β-TCP modified hybrid coatings, improving both the biocompatibility and corrosion resistance of the Ti6Al4V alloy.
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Magdy NM, Kola MZ, Alqahtani HH, Alqahtani MD, Alghmlas AS. Evaluation of Surface Roughness of Different Direct Resin-based Composites. J Int Soc Prev Community Dent 2017; 7:104-109. [PMID: 28584779 PMCID: PMC5452562 DOI: 10.4103/jispcd.jispcd_72_17] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 04/05/2017] [Indexed: 11/12/2022] Open
Abstract
Aims and Objective: To evaluate surface roughness of different resin-based composites. Materials and Methods: Three resin composites, one nanohybrid, one nanoceramic, and one bulk-fill resin-based composite, were used in this study. Cylindrical Teflon mold and 8 mm in diameter and 2 mm in thickness disc specimens were prepared. For each composite material, 15 discs were fabricated, with a total of sixty discs were obtained (n = 60). A glass slide 1–2 mm thick was placed over the strip before curing with the light-curing unit to flatten the surfaces. The specimens were then cured for 40 s through the Mylar strip and the glass slide. Five specimens per each material received no finishing treatment after being cured under Mylar strips; these specimens served as a control. Ten specimens from each composite material were finished/polished with Eve discs at coarse, medium, fine, and superfine grits for 30 s (using stopwatch) each on the specimens. After polishing, the composite surfaces were assessed quantitatively by profilometry and qualitatively by scanning electron microscopy. Data were analyzed using SPSS software. Results: Tetric Evo Ceram and Tetric Evo Ceram Bulk-Fill specimens polished with Eve revealed slightly the same surface appearance as the Mylar strip. Eve discs scratched and exposed fillers of Ceram-x. Eve discs for Z250 surfaces exposed and scratched the filler particles but less than occurred with Ceram-x. Conclusion: Bulk-Fill and nanohybrid resin composites exhibit smoothest surfaces compared with nanoceramic and microhybrid resin composites after polishing.
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Affiliation(s)
- Nashaat Mohammed Magdy
- Department of Conservative Dental Science, College of Dentistry, Prince Sattam Bin Abdulaziz University, Kingdom of Saudi Arabia
| | - Mohammed Zaheer Kola
- Department of Prosthetic Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Kingdom of Saudi Arabia
| | - Hamod Hussain Alqahtani
- Department of Conservative Dental Science, College of Dentistry, Prince Sattam Bin Abdulaziz University, Kingdom of Saudi Arabia
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Avolio R, D'Albore M, Guarino V, Gentile G, Cocca MC, Zeppetelli S, Errico ME, Avella M, Ambrosio L. Pure titanium particle loaded nanocomposites: study on the polymer/filler interface and hMSC biocompatibility. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2016; 27:153. [PMID: 27585912 DOI: 10.1007/s10856-016-5765-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 08/05/2016] [Indexed: 06/06/2023]
Abstract
The integration of inorganic nanoparticles into polymer matrices allows for the modification of physical properties as well as the implementation of new features for unexplored application fields. Here, we propose the study of a new metal/polymer nanocomposite fabricated by dispersing pure Ti nanoparticles into a poly(methylmetacrilate) matrix via solvent casting process, to investigate its potential use as new biomaterial for biomedical applications. We demonstrated that Ti nanoparticles embedded in the poly(methylmetacrilate) matrix can act as reinforcing agent, not negatively influencing the biological response of human mesenchymal stem cell in terms of cytotoxicity and cell viability. As a function of relative amount and surface treatment, Ti nanoparticles may enhance mechanical strength of the composite-ranging from 31.1 ± 2.5 to 43.7 ± 0.7 MPa-also contributing to biological response in terms of adhesion and proliferation mechanisms. In particular, for 1 wt% Ti, treated Ti nanoparticles improve cell materials recognition, as confirmed by higher cell spreading-quantified in terms of cell area via image analysis-locally promoting stronger interactions at cell matrix interface. At this stage, these preliminary results suggest a promising use of pure Ti nanoparticles as filler in polymer composites for biomedical applications.
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Affiliation(s)
- Roberto Avolio
- Institute for Polymers, Composites and Biomaterials, National Research Council of Italy, Via Campi Flegrei 34, 80078, Pozzuoli, Italy
| | - Marietta D'Albore
- Institute for Polymers, Composites and Biomaterials, National Research Council of Italy, Mostra d'Oltremare, Pad.20, V.le Kennedy 54, 80125, Naples, Italy
| | - Vincenzo Guarino
- Institute for Polymers, Composites and Biomaterials, National Research Council of Italy, Mostra d'Oltremare, Pad.20, V.le Kennedy 54, 80125, Naples, Italy.
| | - Gennaro Gentile
- Institute for Polymers, Composites and Biomaterials, National Research Council of Italy, Via Campi Flegrei 34, 80078, Pozzuoli, Italy
| | - Maria Cristina Cocca
- Institute for Polymers, Composites and Biomaterials, National Research Council of Italy, Via Campi Flegrei 34, 80078, Pozzuoli, Italy
| | - Stefania Zeppetelli
- Institute for Polymers, Composites and Biomaterials, National Research Council of Italy, Mostra d'Oltremare, Pad.20, V.le Kennedy 54, 80125, Naples, Italy
| | - Maria Emanuela Errico
- Institute for Polymers, Composites and Biomaterials, National Research Council of Italy, Via Campi Flegrei 34, 80078, Pozzuoli, Italy
| | - Maurizio Avella
- Institute for Polymers, Composites and Biomaterials, National Research Council of Italy, Via Campi Flegrei 34, 80078, Pozzuoli, Italy
| | - Luigi Ambrosio
- Institute for Polymers, Composites and Biomaterials, National Research Council of Italy, Mostra d'Oltremare, Pad.20, V.le Kennedy 54, 80125, Naples, Italy
- Department of Chemical Sciences & Materials Technology, National Research Council of Italy, P.le A. Moro, 7, 00185, Rome, Italy
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Preparation, morphological and thermal characterization of novel nanocomposites based on poly (amide-ester-imide) containing amino acid and nano-Mg-doped fluorapatite surface modified with biodegradable diacid N-trimellitylimido-L-leucine. JOURNAL OF POLYMER RESEARCH 2016. [DOI: 10.1007/s10965-016-1107-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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