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Chen T, Jinno Y, Atsuta I, Tsuchiya A, Obinata S, Iimori R, Kimura T, Ayukawa Y. Synergistic Effect of Nano Strontium Titanate Coating and Ultraviolet C Photofunctionalization on Osteogenic Performance and Soft Tissue Sealing of poly(ether-ether-ketone). ACS Biomater Sci Eng 2024; 10:825-837. [PMID: 38267012 PMCID: PMC10866145 DOI: 10.1021/acsbiomaterials.3c01684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 12/19/2023] [Accepted: 01/04/2024] [Indexed: 01/26/2024]
Abstract
This study aimed to evaluate the bioactivity of poly(ether ether ketone) (PEEK) after surface modification by persistent photoconductive strontium titanate (SrTiO3) magnetron sputtering and ultraviolet (UV) C irradiation. According to the different modifications, the PEEK specimens were randomly divided into five groups (n = 38/group): PEEK, Sr100-PEEK, Sr200-PEEK, UV/PEEK, and UV/Sr200-PEEK. Then, the specimens of Sr100-PEEK and Sr200-PEEK groups were, respectively, coated with 100 and 200 nm thickness photocatalyst SrTiO3 on the PEEK surface by magnetron sputtering. Subsequently, UV-C light photofunctionalized the specimens of PEEK and Sr200-PEEK groups to form UV/PEEK and UV/Sr200-PEEK groups. The specimens were characterized by a step meter, scanning electron microscopy (SEM), atomic force microscopy (AFM), energy dispersive X-ray spectroscopy (EDX), and a water contact angle meter. The release test of the Sr ion was performed by inductively coupled plasma mass spectrometry (ICP-MS). In vitro study, osteogenic activity (MC3T3-E1 osteoblast-like cells) and epithelial and connective tissue attachment (gingival epithelial cells GE1 and fibroblasts NIH3T3) were analyzed in five groups. Surface morphology of the specimens was changed after coating, and the Sr content on the Sr-PEEK surface was increased with increasing coating thickness. In addition, the contact angle was increased significantly after magnetron sputtering. After UV-C photofunctionalization, the content of surface elements changed and the contact angle was decreased. The release of Sr ion was sustained, and the final cumulative release amount did not exceed the safety limit. In vitro experiments showed that SrTiO3 improved the cell activity of MC3T3-E1 and UV-C irradiation further enhanced the osteogenic performance of PEEK. Besides, UV-C irradiation also significantly promoted the cell viability, development, and expression of adhesion proteins of GE1 and NIH3T3 on PEEK. The present investigation demonstrated that nano SrTiO3 coating with UV-C photofunctionalization synergistically enhanced the osteogenic properties and soft tissue sealing function of PEEK in vitro.
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Affiliation(s)
- Tianjie Chen
- Section
of Implant and Rehabilitative Dentistry, Division of Oral Rehabilitation,
Faculty of Dental Science, Kyushu University, Fukuoka 812-8582, Japan
| | - Yohei Jinno
- Section
of Implant and Rehabilitative Dentistry, Division of Oral Rehabilitation,
Faculty of Dental Science, Kyushu University, Fukuoka 812-8582, Japan
| | - Ikiru Atsuta
- Division
of Advanced Dental Devices and Therapeutics, Faculty of Dental Science, Kyushu University, Fukuoka 812-8582, Japan
| | - Akira Tsuchiya
- Department
of Biomaterials, Faculty of Dental Science, Kyushu University, Fukuoka 812-8582, Japan
| | - Sora Obinata
- Department
of Physics, Faculty of Science, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
| | - Riku Iimori
- Department
of Physics, Faculty of Science, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
| | - Takashi Kimura
- Department
of Physics, Faculty of Science, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
| | - Yasunori Ayukawa
- Section
of Implant and Rehabilitative Dentistry, Division of Oral Rehabilitation,
Faculty of Dental Science, Kyushu University, Fukuoka 812-8582, Japan
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Alao AR. Optimization of surface roughness, phase transformation and shear bond strength in sandblasting process of YTZP using statistical machine learning. J Mech Behav Biomed Mater 2024; 150:106245. [PMID: 37992583 DOI: 10.1016/j.jmbbm.2023.106245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 11/10/2023] [Accepted: 11/13/2023] [Indexed: 11/24/2023]
Abstract
Sandblasting process is often applied to roughen the intaglio of yttria tetragonal zirconia polycrystals (YTZP) surfaces for easy and quality adhesion and micro-shear retention with dentine/resin cements. Sandblasting process parameters have shown to influence, at different scales, surface roughness, phase transformation and shear bond strength, all of which are referred, herein, as performance characteristics. This study aimed to find the parametric settings of sandblasting parameters that could simultaneously optimize these performance characteristics, hypothetically testing the probability. YTZP surfaces were sandblasted at different levels of incidence angle (IA), abrasive particle size (AP), pressure(P) and sandblasting time (ST) following the Taguchi method based on the two-level parametric process settings (L8(27)). Surface morphologies, roughness (SR), monoclinic content (MC), and shear bond strength (SS) were characterized by the SEM, average surface roughness, XRD, and shear bond strength tests, respectively. Rough surfaces containing scratches, plastic deformation streaks, micro cracks and pitting were observed. According to the Taguchi method, the same optimum sandblasting parametric setting maximized SR and MC but failed to maximize SS. Subsequently, the principal component analysis embedded in statistical machine learning was applied to find the optimum sandblasting parametric setting that maximized all the performance characteristics. The optimum sandblasting setting of IA = 45°, AP = 110 μm, ST = 20 s and P = 400 kPa predicted the maximum values of SR = 0.773 μm, MC = 36% and SS = 16.6 MPa. Analysis of variance confirmed AP and P as the most influencing parameters affecting all performance characteristics. Finally, these results provide a systematic and comprehensive route for optimizing sandblasting roughening of YTZP surfaces which can be adopted in adhesive dental and orthodontic industry.
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Affiliation(s)
- Abdur-Rasheed Alao
- Mechanical Engineering Programme Area, Faculty of Engineering, Universiti Teknologi Brunei, Gadong, BE1410, Brunei Darussalam; Wellness Research Thrust, Universiti Teknologi Brunei, Gadong, BE1410, Brunei Darussalam.
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Chopra D, Guo T, Gulati K, Ivanovski S. Load, unload and repeat: Understanding the mechanical characteristics of zirconia in dentistry. Dent Mater 2024; 40:e1-e17. [PMID: 37891132 DOI: 10.1016/j.dental.2023.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 09/11/2023] [Accepted: 10/05/2023] [Indexed: 10/29/2023]
Abstract
OBJECTIVES Zirconia-based dental restorations and implants are gaining attention due to their bioactivity, corrosion resistance and mechanical stability. Further, surface modification of zirconia implants has been performed at the macro-, micro- and nanoscale to augment bioactivity. While zirconia's physical and chemical characteristics have been documented, its relation to mechanical performance still needs to be explored. This extensive review aims to address this knowledge gap. METHODS This review critically compares and contrasts the findings from articles published in the domain of 'mechanical stability of zirconia\ in dentistry' based on a literature survey (Web of Science, Medline/PubMed and Scopus databases) and a review of the relevant publications in international peer-reviewed journals. Reviewing the published data, the mechanical properties of zirconia, such as fracture resistance, stress/tension, flexural strength, fatigue, and wear are detailed and discussed to understand the biomechanical compatibility of zirconia with the mechanical performance of modified zirconia in dentistry also explored. RESULTS A comprehensive insight into dental zirconia's critical fundamental mechanical characteristics and performance is presented. Further, research challenges and future directions in this domain are recommended. SIGNIFICANCE This review extends existing knowledge of zirconia's biomechanical performance and it they can be modulated to design the next generation of zirconia dental restorations and implants to withstand long-term constant loading.
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Affiliation(s)
- Divya Chopra
- The University of Queensland, School of Dentistry, Herston, QLD 4006, Australia; Centre for Orofacial Regeneration, Reconstruction and Rehabilitation (COR3), Herston, QLD 4006, Australia
| | - Tianqi Guo
- The University of Queensland, School of Dentistry, Herston, QLD 4006, Australia; Centre for Orofacial Regeneration, Reconstruction and Rehabilitation (COR3), Herston, QLD 4006, Australia
| | - Karan Gulati
- The University of Queensland, School of Dentistry, Herston, QLD 4006, Australia; Centre for Orofacial Regeneration, Reconstruction and Rehabilitation (COR3), Herston, QLD 4006, Australia.
| | - Sašo Ivanovski
- The University of Queensland, School of Dentistry, Herston, QLD 4006, Australia; Centre for Orofacial Regeneration, Reconstruction and Rehabilitation (COR3), Herston, QLD 4006, Australia.
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Peng M, Chuan JL, Zhao GP, Fu Q. Construction of silver-coated high translucent zirconia implanting abutment material and its property of antibacterial. ARTIFICIAL CELLS, NANOMEDICINE, AND BIOTECHNOLOGY 2023; 51:441-452. [PMID: 37594201 DOI: 10.1080/21691401.2023.2244013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 07/13/2023] [Accepted: 07/29/2023] [Indexed: 08/19/2023]
Abstract
High translucent zirconia (HTZ) has excellent mechanical properties, biocompatibility, and good semi-translucency making it an ideal material for aesthetic anterior dental implant abutments without antibacterial properties. In the oral environment, the surface of the abutment material is susceptible to microbial adhesion and biofilm formation, which can lead to infection or peri-implantitis and even implant failure. This study aims to promote the formation of a biological seal at the implant-soft tissue interface by modifying the HTZ surface, using the load-bearing capacity of the aluminosilicate porous structure and the broad-spectrum antibacterial effect of silver nanoparticles to prevent peri-implant bacterial infection and inflammation and to improve the success rate and prolong the use of the implant. FE-SEM (field emission scanning electron microscopes), EDS (energy dispersive spectroscopy), and XPS (X-ray photoelectron spectroscopy) results showed that aluminosilicate non-vacuum sintering can form open micro- and nanoporous structures on HTZ surfaces, and that porous aluminosilicate coatings obtain a larger number, smaller size, and more uniformly shaped silver nanoparticles than smooth aluminosilicate coatings, and could be deposited deeper in the coating. The ICP-AES (inductively coupled plasma-atomic emission spectroscopy) results showed that the early silver ion release of both the smooth silver coating and the porous silver coating was obvious, the silver ion concentration released by the former was higher than that of the latter. However, the silver ion concentration released by the porous silver coating was higher than that of the smooth coating when the release slowed down. Both smooth and porous silver coatings both inhibited E. coli (Escherichia coli), S. aureus (Staphylococcus aureus), and L. acidophilus (L. acidophilus), and porous silver coatings had stronger antibacterial properties. The silver coating was successfully constructed on the surface of HTZ, through aluminium silicate sintering and silver nitrate solution impregnation. It was found that the high concentration environment of silver nitrate solution was more advantageous for nano-Ag deposition, and the non-vacuum sintered porous surface was able to obtain a larger number of nano-Ag particles with smaller sizes. The porous Ag coating exhibited superior antibacterial properties. It was suggested that the HTZ with silver coating had clinical application, and good antibacterial properties that can improve the survival rate and service life of implants.
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Affiliation(s)
- Min Peng
- Department of Stomatology, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, Chengdu, Sichuan, China
- School of Medicine, University of Electronic Science and Technology of Chengdu, Sichuan, China
| | - Jun-Lan Chuan
- Department of Pharmacy, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
| | - Gao-Ping Zhao
- Department of Gastroinstestinal Surgery, Sichuan Academy of medical sciences and Sichuan Provincial People's Hospital, University of Medical sciences and technology of China, Chengdu, Sichuan, China
| | - Qiang Fu
- Organ Transplantation Center, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
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Yousaf M, Iqbal T, Afsheen S, Riaz KN, Al-Zaqri N, Warad I, Ahmed H, Asghar M, Shafiq M. Effect of TiN-Based Nanostructured Coatings on the Biocompatibility of NiTi Non-ferrous Metallic Alloy by Cathodic Cage Plasma Processing. J Inorg Organomet Polym Mater 2023. [DOI: 10.1007/s10904-023-02568-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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Li M, Wang M, Wei L, Werner A, Liu Y. Biomimetic calcium phosphate coating on medical grade stainless steel improves surface properties and serves as a drug carrier for orthodontic applications. Dent Mater 2023; 39:152-161. [PMID: 36610898 DOI: 10.1016/j.dental.2022.12.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 12/05/2022] [Accepted: 12/24/2022] [Indexed: 01/07/2023]
Abstract
OBJECTIVE Recently, stainless steel (SSL) miniscrew implants have been used in orthodontic clinics as temporary anchorage devices. Although they have excellent physical properties, their biocompatibility is relatively poor. Previously, our group developed a two-phase biomimetic calcium phosphate (BioCaP) coating that can significantly improve the biocompatibility of medical devices. This study aimed to improve the biocompatibility of SSL by coating SSL surface with the BioCaP coating. METHODS Titanium (Ti) discs and SSL discs (diameter: 5 mm, thickness: 1 mm) were used in this study. To form an amorphous layer, the Ti discs were immersed in a biomimetic modified Tyrode solution (BMT) for 24 h. The SSL discs were immersed in the same solution for 0 h, 12 h, 24 h, 36 h and 48 h. To form a crystalline layer, the discs were then immersed in a supersaturated calcium phosphate solution (CPS) for 48 h. The surface properties of the BioCaP coatings were analysed. In addition, bovine serum albumin (BSA) was incorporated into the crystalline layer during biomimetic mineralisation as a model protein. RESULTS The morphology, chemical composition and drug loading capacity of the BioCaP coating on smooth SSL were confirmed. This coating improved roughness and wettability of SSL surface. In vitro, with the extension of BMT coating period, the cell seeding efficiency, cell spreading area and cell proliferation on the BioCaP coating were increased. SIGNIFICANCE These in vitro results show that the BioCaP coating can improve surface properties of smooth medical grade SSL and serve as a carrier system for bioactive agents.
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Affiliation(s)
- Menghong Li
- Department of Oral Cell Biology, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije University Amsterdam, Amsterdam, the Netherlands
| | - Mingjie Wang
- Department of Oral Cell Biology, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije University Amsterdam, Amsterdam, the Netherlands
| | - Lingfei Wei
- Department of Oral Cell Biology, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije University Amsterdam, Amsterdam, the Netherlands; Department of Oral Implantology, Yantai Stomatological Hospital, Yantai, China; Department of Second Dental Center, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; College of Stomatology, Shanghai Jiao Tong University; National Center for Stomatology; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology; Shanghai Research Institute of Stomatology, China
| | - Arie Werner
- Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije University Amsterdam, Amsterdam, the Netherlands
| | - Yuelian Liu
- Department of Oral Cell Biology, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije University Amsterdam, Amsterdam, the Netherlands.
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Rohr N, Schönenberger AJ, Fischer J. Influence of Surface Treatment and Accelerated Ageing on Biaxial Flexural Strength and Hardness of Zirconia. MATERIALS (BASEL, SWITZERLAND) 2023; 16:910. [PMID: 36769917 PMCID: PMC9917567 DOI: 10.3390/ma16030910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/10/2023] [Accepted: 01/15/2023] [Indexed: 06/18/2023]
Abstract
The aim was to investigate how the surface treatment and the process of accelerated ageing of zirconia for dental implants affect the biaxial flexural strength and hardness. Zirconia discs with a diameter of 12.6 mm were subjected to either one of the following treatments: polishing (Zp); polishing and heat treatment at 1250 °C for 1 h (Zpt); machining (Zm); machining and heat treatment (Zmt); or sandblasting, acid-etching, and heat treatment (Z14) (n = 45 per group). Biaxial flexural strength and Martens hardness (HM) were measured without further treatment and after accelerated ageing for 5 h or 5 × 5 h according to ISO 13356 (n = 15 per group). Two-way ANOVA was applied to test the effect of surface treatment and ageing (α = 0.05). The reliability of the specimens was described with Weibull two-parameter distribution of biaxial flexural strength data. Overall, the surface treatment (p < 0.001) and ageing (p = 0.012) revealed a significant effect on biaxial flexural strength values, while HM was only affected by the surface treatment (p < 0.001) but not ageing (p = 0.160). Surface treatment significantly affected HM (p < 0.001) but not ageing (p = 0.160). The applied surface treatments affected the biaxial flexural strength and HM of zirconia. For accelerated ageing, a duration of both 5 h and 5 × 5 h is recommended to evaluate the effect of surface treatments. Zm was the most reliable surface as it was least affected by ageing and provided low standard deviations of biaxial flexural strength values.
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dos Santos FSF, Rodrigues JFB, da Silva MC, Barreto MEV, da Silva HN, de Lima Silva SM, Fook MVL. Use of Piranha Solution as An Alternative Route to Promote Bioactivation of PEEK Surface with Low Functionalization Times. MOLECULES (BASEL, SWITZERLAND) 2022; 28:molecules28010074. [PMID: 36615270 PMCID: PMC9822504 DOI: 10.3390/molecules28010074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/28/2022] [Accepted: 08/30/2022] [Indexed: 12/24/2022]
Abstract
This study aimed to achieve bioactivity on the PEEK surface using piranha solution through a lower functionalization time. For this purpose, the functionalization occurred with piranha solution and 98% sulfuric acid in the proportions of 1:2, 1:1, and 2:1 at periods of 30, 60, and 90 s. The samples treated for longer times at higher concentrations registered the characteristic spectroscopy band associated with sulfonation. Additionally, both chemical treatments allowed the opening of the aromatic ring, increasing the number of functional groups available and making the surface more hydrophilic. The piranha solution treatments with higher concentrations and longer times promoted greater heterogeneity in the surface pores, which affected the roughness of untreated PEEK. Furthermore, the treatments induced calcium deposition on the surface during immersion in SBF fluid. In conclusion, the proposed chemical modifications using sulfuric acid SPEEK 90 and, especially, the piranha solution PEEK-PS 2:1-90, were demonstrated to be promising in promoting the rapid bioactivation of PEEK-based implants.
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Hassouna M, Al-Zordk W, Aboshilib M, Ghazy M. Clinical and radiographic prospective study of customized one-piece titanium and one-piece fusion-sputtered zirconia implants: five-year mean follow-up. BMC Oral Health 2022; 22:531. [PMID: 36424624 PMCID: PMC9685929 DOI: 10.1186/s12903-022-02600-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 09/26/2022] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND To evaluate the clinical and radiographic assessment of customized fusion-sputtered one-piece zirconia implants. METHODS Twenty-eight patients received either fusion sputtered one-piece zirconia implants (n = 14) or one-piece titanium implants (n = 14). All implants were one-piece designs. After 4 months of immediate loading, all implants were restored with a monolithic zirconia crown. All implants were evaluated at baseline, 6 months, 1 year, 2 years, and 5 years. Implant mobility, plaque index, and gingival index evaluations were performed. The measurements of marginal bone level were calculated radiographically. RESULTS All implants were well maintained through the evaluation period with a 100% survival rate without any clinical complications. Regarding gingival index, there was no statistically significant difference (P = .364) between zirconia (3.3 ± 0.7 mm) and titanium (3.5 ± 0.6 mm) implants, after 5 years. There was no statistically significant difference (P = .470) between zirconia (1.77 ± 0.039 mm) and titanium (1.80 ± 0.28 mm) implants regarding marginal bone loss, after 5 years. CONCLUSIONS One-piece fusion-sputtered zirconia implant represents a reliable treatment modality in replacing a missing tooth in the esthetic zone.
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Affiliation(s)
- Mahy Hassouna
- grid.10251.370000000103426662Fixed Prosthodontics Department, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Walid Al-Zordk
- grid.10251.370000000103426662Fixed Prosthodontics Department, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Moustafa Aboshilib
- grid.7155.60000 0001 2260 6941Biomaterials Department, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
| | - Mohamed Ghazy
- grid.10251.370000000103426662Fixed Prosthodontics Department, Faculty of Dentistry, Mansoura University, Mansoura, Egypt ,Faculty of Dentistry, Horus University, New Damietta, Egypt
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Zhang F, Spies BC, Willems E, Inokoshi M, Wesemann C, Cokic SM, Hache B, Kohal RJ, Altmann B, Vleugels J, Van Meerbeek B, Rabel K. 3D printed zirconia dental implants with integrated directional surface pores combine mechanical strength with favorable osteoblast response. Acta Biomater 2022; 150:427-441. [PMID: 35902036 DOI: 10.1016/j.actbio.2022.07.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Revised: 06/25/2022] [Accepted: 07/19/2022] [Indexed: 11/01/2022]
Abstract
Dental implants need to combine mechanical strength with promoted osseointegration. Currently used subtractive manufacturing techniques require a multi-step process to obtain a rough surface topography that stimulates osseointegration. Advantageously, additive manufacturing (AM) enables direct implant shaping with unique geometries and surface topographies. In this study, zirconia implants with integrated lamellar surface topography were additively manufactured by nano-particle ink-jetting. The ISO-14801 fracture load of as-sintered implants (516±39 N) resisted fatigue in 5-55°C water thermo-cycling (631±134 N). Remarkably, simultaneous mechanical fatigue and hydrothermal aging at 90°C significantly increased the implant strength to 909±280 N due to compressive stress generated at the seamless transition of the 30-40 µm thick, rough and porous surface layer to the dense implant core. This unique surface structure induced an elongated osteoblast morphology with uniform cell orientation and allowed for osteoblast proliferation, long-term attachment and matrix mineralization. In conclusion, the developed AM zirconia implants not only provided high long-term mechanical resistance thanks to the dense core along with compressive stress induced at the transition zone, but also generated a favorable osteoblast response owing to the integrated directional surface pores. STATEMENT OF SIGNIFICANCE: : Zirconia ceramics are becoming the material of choice for metal-free dental implants, however significant efforts are required to obtain a rough/porous surface for enhanced osseointegration, along with the risk of surface delamination and/or microstructure variation. In this study, we addressed the challenge by additively manufacturing implants that seamlessly combine dense core with a porous surface layer. For the first time, a unique surface with a directional lamellar pore morphology was additively obtained. This AM implant also provided strength as strong as conventionally manufactured zirconia implants before and after long-term fatigue. Favorable osteoblast response was proved by in-vitro cell investigation. This work demonstrated the opportunity to AM fabricate novel ceramic implants that can simultaneously meet the mechanical and biological functionality requirements.
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Affiliation(s)
- Fei Zhang
- KU Leuven (University of Leuven), Department of Materials Engineering, Leuven, Belgium; KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, Leuven, Belgium.
| | - Benedikt C Spies
- University of Freiburg, Faculty of Medicine, Center for Dental Medicine, Department of Prosthetic Dentistry, Freiburg, Germany
| | - Evita Willems
- KU Leuven (University of Leuven), Department of Materials Engineering, Leuven, Belgium; KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, Leuven, Belgium
| | - Masanao Inokoshi
- Tokyo Medical and Dental University, Graduate School of Medical and Dental Sciences, Department of Gerodontology and Oral Rehabilitation, Tokyo, Japan
| | - Christian Wesemann
- University of Freiburg, Faculty of Medicine, Center for Dental Medicine, Department of Prosthetic Dentistry, Freiburg, Germany; Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Berlin, Germany
| | - Stevan M Cokic
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, Leuven, Belgium
| | - Benedikt Hache
- University of Freiburg, Faculty of Medicine, Center for Dental Medicine, Department of Prosthetic Dentistry, Freiburg, Germany; University of Freiburg, Faculty of Medicine, Research Center for Tissue Replacement, Regeneration and Neogenesis, Section of Cell biology-inspired Bone Regeneration, G.E.R.N. Freiburg, Germany
| | - Ralf J Kohal
- University of Freiburg, Faculty of Medicine, Center for Dental Medicine, Department of Prosthetic Dentistry, Freiburg, Germany
| | - Brigitte Altmann
- University of Freiburg, Faculty of Medicine, Center for Dental Medicine, Department of Prosthetic Dentistry, Freiburg, Germany; University of Freiburg, Faculty of Medicine, Research Center for Tissue Replacement, Regeneration and Neogenesis, Section of Cell biology-inspired Bone Regeneration, G.E.R.N. Freiburg, Germany
| | - Jef Vleugels
- KU Leuven (University of Leuven), Department of Materials Engineering, Leuven, Belgium
| | - Bart Van Meerbeek
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, Leuven, Belgium
| | - Kerstin Rabel
- University of Freiburg, Faculty of Medicine, Center for Dental Medicine, Department of Prosthetic Dentistry, Freiburg, Germany
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Bapat RA, Yang HJ, Chaubal TV, Dharmadhikari S, Abdulla AM, Arora S, Rawal S, Kesharwani P. Review on synthesis, properties and multifarious therapeutic applications of nanostructured zirconia in dentistry. RSC Adv 2022; 12:12773-12793. [PMID: 35496329 PMCID: PMC9044188 DOI: 10.1039/d2ra00006g] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2022] [Accepted: 04/11/2022] [Indexed: 12/17/2022] Open
Abstract
Amongst dental ceramics, nano zirconia (ZrNp) has shown exceptional developments in the field of dentistry in recent years. Zirconia is an oxide that possess superior optical, mechanical, and biological properties. As a novel nanoparticle, it has been widely used in various fields of dentistry due to its improved mechanical properties, biocompatibility, and stable structure. Provision of metal free solutions is one of the prime requirements in dental materials. Many metal alloys used extensively possess unaesthetic colors and display chemical interactions in the oral cavity encouraging use of zirconia for dental use. Use of ZrNp based ceramics has increased due to its resistance to corrosion, superior color matching that enhances esthetics and improved strength compared to conventional biomaterials. This review discusses the recent scientific literature on the synthesis, properties and types, applications, and toxicity of ZrNp in the field of dentistry.
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Affiliation(s)
- Ranjeet A Bapat
- Faculty, Division of Restorative Dentistry, School of Dentistry, International Medical University Kuala Lumpur 57000 Malaysia
| | - Ho Jan Yang
- Postgraduate Student, Department of Restorative Dentistry, University of Malaya 50603 Kuala Lumpur Malaysia
| | - Tanay V Chaubal
- Faculty, Division of Restorative Dentistry, School of Dentistry, International Medical University Kuala Lumpur 57000 Malaysia
| | - Suyog Dharmadhikari
- Faculty, School of Dentistry, DY Patil Deemed to be University Navi-mumbai-400706 India
| | - Anshad Mohamed Abdulla
- Faculty, Department of Pediatric Dentistry and Orthodontic Sciences, King Khalid University Abha Kingdom of Saudi Arabia
| | - Suraj Arora
- Faculty, Department of Restorative Dental Sciences, King Khalid University Abha Kingdom of Saudi Arabia
| | - Swati Rawal
- Faculty, Director, Predoctoral Periodontology, Marquette University Milwaukee WI 53201-1881 USA
| | - Prashant Kesharwani
- Department of Pharmaceutics, School of Pharmaceutical Education and Research Jamia Hamdard New Delhi-110062 India https://scholar.google.com/citations?user=DJkvOAQAAAAJ&hl=en +91-7999710141 +91-7999710141
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A quantitative analysis of cell bridging kinetics on a scaffold using computer vision algorithms. Acta Biomater 2021; 136:429-440. [PMID: 34571272 DOI: 10.1016/j.actbio.2021.09.042] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 09/19/2021] [Accepted: 09/21/2021] [Indexed: 01/01/2023]
Abstract
Tissue engineering involves the seeding of cells into a structural scaffolding to regenerate the architecture of damaged or diseased tissue. To effectively design a scaffold, an understanding of how cells collectively sense and react to the geometry of their local environment is needed. Advances in the development of melt electro-writing have allowed micron and submicron polymeric fibres to be accurately printed into porous, complex and three-dimensional structures. By using melt electrowriting, we created a geometrically relevant in vitro scaffold model to study cellular spatial-temporal kinetics. These scaffolds were paired with custom computer vision algorithms to investigate cell nuclei, cell membrane actin and scaffold fibres over different pore sizes (200-600 µm) and time points (28 days). We find that cells proliferated much faster in the smaller (200 µm) pores which halved the time until confluence versus larger (500 and 600 µm) pores. Our analysis of stained actin fibres revealed that cells were highly aligned to the fibres and the leading edge of the pore filling front, and we found that cells behind the leading edge were not aligned in any particular direction. This study provides a systematic understanding of cellular spatial temporal kinetics within a 3D in vitro model to inform the design of more effective synthetic tissue engineering scaffolds for tissue regeneration. STATEMENT OF SIGNIFICANCE: Advances in the development of melt electro-writing have allowed micron and submicron polymeric fibres to be accurately printed into porous, complex and three-dimensional structures. By using melt electrowriting, we created a geometrically relevant in vitro model to study cellular spatial-temporal kinetics to provide a systematic understanding of cellular spatial temporal kinetics within a 3D in vitro model. The insights presented in this work help to inform the design of more effective synthetic tissue engineering scaffolds by reducing cell culture time; which is valuable information for the implant or lab-grown-meat industries.
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Chen J, Yang Y, Etim IP, Tan L, Yang K, Misra RDK, Wang J, Su X. Recent Advances on Development of Hydroxyapatite Coating on Biodegradable Magnesium Alloys: A Review. MATERIALS 2021; 14:ma14195550. [PMID: 34639949 PMCID: PMC8509838 DOI: 10.3390/ma14195550] [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: 08/31/2021] [Revised: 09/18/2021] [Accepted: 09/23/2021] [Indexed: 12/30/2022]
Abstract
The wide application of magnesium alloys as biodegradable implant materials is limited because of their fast degradation rate. Hydroxyapatite (HA) coating can reduce the degradation rate of Mg alloys and improve the biological activity of Mg alloys, and has the ability of bone induction and bone conduction. The preparation of HA coating on the surface of degradable Mg alloys can improve the existing problems, to a certain extent. This paper reviewed different preparation methods of HA coatings on biodegradable Mg alloys, and their effects on magnesium alloys’ degradation, biocompatibility, and osteogenic properties. However, no coating prepared can meet the above requirements. There was a lack of systematic research on the degradation of coating samples in vivo, and the osteogenic performance. Therefore, future research can focus on combining existing coating preparation technology and complementary advantages to develop new coating preparation techniques, to obtain more balanced coatings. Second, further study on the metabolic mechanism of HA-coated Mg alloys in vivo can help to predict its degradation behavior, and finally achieve controllable degradation, and further promote the study of the osteogenic effect of HA-coated Mg alloys in vivo.
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Affiliation(s)
- Junxiu Chen
- Key Laboratory of Materials Surface Science and Technology of Jiangsu Province, Changzhou University, Changzhou 213164, China; (Y.Y.); (J.W.); (X.S.)
- Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, China
- Correspondence: (J.C.); (K.Y.)
| | - Yang Yang
- Key Laboratory of Materials Surface Science and Technology of Jiangsu Province, Changzhou University, Changzhou 213164, China; (Y.Y.); (J.W.); (X.S.)
- Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, China
| | - Iniobong P. Etim
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; (I.P.E.); (L.T.)
| | - Lili Tan
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; (I.P.E.); (L.T.)
| | - Ke Yang
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; (I.P.E.); (L.T.)
- Correspondence: (J.C.); (K.Y.)
| | - R. D. K. Misra
- Department of Metallurgical, Materials and Biomedical Engineering, University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA;
| | - Jianhua Wang
- Key Laboratory of Materials Surface Science and Technology of Jiangsu Province, Changzhou University, Changzhou 213164, China; (Y.Y.); (J.W.); (X.S.)
- Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, China
| | - Xuping Su
- Key Laboratory of Materials Surface Science and Technology of Jiangsu Province, Changzhou University, Changzhou 213164, China; (Y.Y.); (J.W.); (X.S.)
- Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, China
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14
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Ban S. Classification and Properties of Dental Zirconia as Implant Fixtures and Superstructures. MATERIALS 2021; 14:ma14174879. [PMID: 34500970 PMCID: PMC8432657 DOI: 10.3390/ma14174879] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 08/16/2021] [Accepted: 08/24/2021] [Indexed: 11/16/2022]
Abstract
Various types of zirconia are widely used for the fabrication of dental implant superstructures and fixtures. Zirconia-alumina composites, such as ATZ and NanoZR, are adequate for implant fixtures because they have excellent mechanical strength in spite of insufficient esthetic properties. On the other hand, yttria-stabilized zirconia has been used for implant superstructures because of sufficient esthetic properties. They are classified to 12 types with yttria content, monochromatic/polychromatic, uniform/hybrid composition, and monolayer/multilayer. Zirconia with a higher yttria content has higher translucency and lower mechanical strength. Fracture strength of superstructures strongly depends on the strength on the occlusal contact region. It suggests that adequate zirconia should be selected as the superstructure crown, depending on whether strength or esthetics is prioritized. Low temperature degradation of zirconia decreases with yttria content, but even 3Y zirconia has a sufficient durability in oral condition. Although zirconia is the hardest dental materials, zirconia restorative rarely subjects the antagonist teeth to occlusal wear when it is mirror polished. Furthermore, zirconia has less bacterial adhesion and better soft tissue adhesion when it is mirror polished. This indicates that zirconia has advantageous for implant superstructures. As implant fixtures, zirconia is required for surface modification to obtain osseointegration to bone. Various surface treatments, such as roughening, surface activation, and coating, has been developed and improved. It is concluded that an adequately selected zirconia is a suitable material as implant superstructures and fixtures because of mechanically, esthetically, and biologically excellent properties.
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Affiliation(s)
- Seiji Ban
- Department of Dental Materials Science, School of Dentistry, Aichi Gakuin University, Nagoya 464-8650, Japan
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15
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Jurak M, Wiącek AE, Ładniak A, Przykaza K, Szafran K. What affects the biocompatibility of polymers? Adv Colloid Interface Sci 2021; 294:102451. [PMID: 34098385 DOI: 10.1016/j.cis.2021.102451] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 05/21/2021] [Accepted: 05/22/2021] [Indexed: 02/07/2023]
Abstract
In recent decades synthetic polymers have gained increasing popularity, and nowadays they are an integral part of people's daily lives. In addition, owing to their competitive advantage and being susceptible to modification, polymers have stimulated the fast development of innovative technologies in many areas of science. Biopolymers are of particular interest in various branches of medicine, such as implantology of bones, cartilage and skin tissues as well as blood vessels. Biomaterials with such specific applications must have appropriate mechanical and strength characteristics and above all they must be compatible with the surrounding tissues, human blood and its components, i.e. exhibit high hemo- and biocompatibility, low or no thrombo- and carcinogenicity, foreign body response (host response), appropriate osteoconduction, osteoinduction and mineralization. For biocompatibility improvement many surface treatment techniques have been utilized leading to fabricate the polymer biomaterials of required properties, also at nanoscale. This review paper discusses the most important physicochemical and biological factors that affect the biocompatibility, thus the reaction of the living organism after insertion of the polymer-based biomaterials, i.e. surface modification and/or degradation, surface composition (functional groups and charge), size and shapes, hydrophilic-hydrophobic character, wettability and surface free energy, topography (roughness, stiffness), crystalline and amorphous structure, nanostructure, cell adhesion and proliferation, cellular uptake. Particularly, the application of polysaccharides (chitosan, cellulose, starch) in the tissue engineering is emphasized.
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16
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Ibrahim AMH, Takacova M, Jelenska L, Csaderova L, Balog M, Kopacek J, Svastova E, Krizik P. The effect of surface modification of TiMg composite on the in-vitro degradation response, cell survival, adhesion, and proliferation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 127:112259. [PMID: 34225844 DOI: 10.1016/j.msec.2021.112259] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 05/21/2021] [Accepted: 06/07/2021] [Indexed: 11/16/2022]
Abstract
This study is aimed to evaluate the influence of mechanical surface treatment on the degradation response, cell survival, adhesion, and proliferation of a TiMg composite material. Two sets of the TiMg samples with different surface characteristics were studied: i) as-machined samples (TiMg-T) and ii) samples with a mechanically modified surface (TiMg-P). Surface roughness was determined using a confocal microscope. Degradation rates (DR) were evaluated in artificial Plasma, HBSS, and NaCl 0.9%. The cell viability was evaluated using an MTT assay. The initial cell adhesion and spreading were investigated using the direct contact assay. An xCELLigence system was employed to provide real-time cell proliferation. The focal adhesion and cell morphological changes were also examined. The DR of TiMg-P decreased by ⁓5 times compared with that of TiMg-T. Surface of the TiMg-P specimens after 72 h exposure to either HBSS or Plasma was passivated by a layer enriched with bioactive Ca/P species. The cell viability of L929 and Saos-2 after 72 h incubation for TiMg-P was 94.6% and 94.8% compared with 73.8% and 74.3% obtained for TiMg-T, respectively. The direct contact assay showed that the initial adhesion and spreading of the L929 cells incubated with TiMg-P was more pronounced compared with that of TiMg-T. The proliferation rate of Saos-2 cells incubated with TiMg-P was higher when compared with that of TiMg-T, and was almost comparable to that of the DMEM-blank between the 24 and 72 h interval. TiMg-P had a pronounced difference in the number and area of Focal Adhesions (FA) compared with that of TiMg-T. The morphology of cells incubated with TiMg-P was not altered. The results confirmed that the smooth and less strained surface of the TiMg-P samples effectively improved the in-vitro degradation response, cell survival, adhesion, and proliferation.
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Affiliation(s)
- Ahmed Mohamed Hassan Ibrahim
- Institute of Materials and Machine Mechanics, The Slovak Academy of Sciences, Dubravska cesta 9, 84513 Bratislava, Slovakia; Centre of Excellence for Advanced Materials Application, The Slovak Academy of Sciences, Dubravska cesta 9, 84511 Bratislava, Slovakia; Institute of Materials Science, Faculty of Materials Science and Technology in Trnava, Slovak University of Technology in Bratislava, Paulinska 16, 91724 Trnava, Slovakia
| | - Martina Takacova
- Biomedical Research Center, Institute of Virology, Department of Cancer Biology, The Slovak Academy of Sciences, Dubravska cesta 9, 84505 Bratislava, Slovakia
| | - Lenka Jelenska
- Biomedical Research Center, Institute of Virology, Department of Cancer Biology, The Slovak Academy of Sciences, Dubravska cesta 9, 84505 Bratislava, Slovakia
| | - Lucia Csaderova
- Biomedical Research Center, Institute of Virology, Department of Cancer Biology, The Slovak Academy of Sciences, Dubravska cesta 9, 84505 Bratislava, Slovakia
| | - Martin Balog
- Institute of Materials and Machine Mechanics, The Slovak Academy of Sciences, Dubravska cesta 9, 84513 Bratislava, Slovakia; Centre of Excellence for Advanced Materials Application, The Slovak Academy of Sciences, Dubravska cesta 9, 84511 Bratislava, Slovakia.
| | - Juraj Kopacek
- Centre of Excellence for Advanced Materials Application, The Slovak Academy of Sciences, Dubravska cesta 9, 84511 Bratislava, Slovakia; Biomedical Research Center, Institute of Virology, Department of Cancer Biology, The Slovak Academy of Sciences, Dubravska cesta 9, 84505 Bratislava, Slovakia
| | - Eliska Svastova
- Centre of Excellence for Advanced Materials Application, The Slovak Academy of Sciences, Dubravska cesta 9, 84511 Bratislava, Slovakia; Biomedical Research Center, Institute of Virology, Department of Cancer Biology, The Slovak Academy of Sciences, Dubravska cesta 9, 84505 Bratislava, Slovakia
| | - Peter Krizik
- Institute of Materials and Machine Mechanics, The Slovak Academy of Sciences, Dubravska cesta 9, 84513 Bratislava, Slovakia
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Polyelectrolyte multilayer composite coating on 316 L stainless steel for controlled release of dual growth factors accelerating restoration of bone defects. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 126:112187. [PMID: 34082986 DOI: 10.1016/j.msec.2021.112187] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 05/08/2021] [Accepted: 05/11/2021] [Indexed: 11/21/2022]
Abstract
A composite coating of polyelectrolyte multilayers (PEMs) consisting of collagen, a chitosan barrier, and poly-γ-glutamic acid was fabricated using a spin coating technique to investigate and overcome the limited osseointegration capacity of 316 L stainless steel (316 L SS). To further enhance the biocompatibility, bone morphogenetic protein 2 (BMP-2) and basic fibroblast growth factor-2 (FGF-2) were loaded separately as dual growth factors, allowing for progressive drug release following the natural process of bone regeneration. The first burst release of FGF-2 triggered the proliferation of surrounding cells, and the subsequent release of BMP-2 stimulated their differentiation. The microstructure, surface potential, hardness, reduced Young's modulus, and wettability were assessed using scanning electron microscopy, nanoindentation, and water contact angle. The formation of apatite layers after immersion in simulated body fluid confirmed the bioactivity of this PEM. PEMs loaded with BMP-2 and FGF-2 showed a long sustained release of growth factors for up to 48 days. The biological properties were studied in vitro with rat bone mesenchymal stem cells (rBMSCs) and in vivo using a rat critical-sized calvarial defect model. PEMs loaded with growth factors further stimulated the proliferation and osteogenic differentiation of rBMSCs and the histology results indicated that new bone tissues could directly grow onto the PEMs. These findings suggest that PEM composite coating possesses significant potential for surface modification and long-term drug release of metallic implants to assist with bone restoration.
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Saito MM, Onuma K, Yamamoto R, Yamakoshi Y. New insights into bioactivity of ceria-stabilized zirconia: Direct bonding to bone-like hydroxyapatite at nanoscale. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 121:111665. [PMID: 33579433 DOI: 10.1016/j.msec.2020.111665] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 09/30/2020] [Accepted: 10/20/2020] [Indexed: 10/23/2022]
Abstract
Osseointegration resulting from biomineralization means tight bone-implant attachment, which is clinically essential for successful dental implant treatment. The osseointegration ability of ceria-stabilized zirconia, a promising implant material, has been questionable and is unclear despite its clinical use due to zirconia's bioinert nature. The purpose of this research was to investigate the osseointegration ability of ceria-stabilized zirconia by clarifying its bioactivity. Here we show that ceria-stabilized zirconia is highly bioactive, contrary to the general consensus. Transmission electron microscopy observation revealed that the zirconia nanocrystals of a ceria-stabilized zirconia substrate directly bonded to osteoblastic cell-precipitated hydroxyapatite crystals at lattice fringe scale. This bonding was achieved without chemical treatment of the substrate surface before use. Hydroxyapatite crystals exhibited a morphology of flexible nanofibers less than 10 nm wide with nanometer-thick plates filling the spaces between nanofibers. Elemental analysis of the hydroxyapatites showed that they contained alkaline metal cations (Na, Mg, and K) as minor elements and that their average Ca/P atomic % ratio was ~1.40, similar to those of bone apatite. High bioactivity of ceria-stabilized zirconia resulted in direct bonding to bone-like hydroxyapatite, suggesting nanoscale direct osseointegration with bone in vivo that contributes to improving the success rate of dental implant treatment.
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Affiliation(s)
- Mari M Saito
- Department of Biochemistry and Molecular Biology, School of Dental Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama 230-8501, Japan.
| | - Kazuo Onuma
- Department of Biochemistry and Molecular Biology, School of Dental Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama 230-8501, Japan; National Institute of Advanced Industrial Science and Technology, Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan
| | - Ryuji Yamamoto
- Department of Biochemistry and Molecular Biology, School of Dental Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama 230-8501, Japan
| | - Yasuo Yamakoshi
- Department of Biochemistry and Molecular Biology, School of Dental Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama 230-8501, Japan
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19
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Akiyama Y, Iwasa F, Hotta Y, Matsumoto T, Oshima Y, Baba K. Effects of surface roughness of ceria-stabilized zirconia/alumina nanocomposite on the morphology and function of human gingival fibroblasts. Dent Mater J 2020; 40:472-480. [PMID: 33268692 DOI: 10.4012/dmj.2019-435] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We evaluated the biological effects of implant abutments made from ceria-stabilized zirconia/alumina nanocomposite (Ce-TZP/Al2O3) with surface roughness variations using human gingival fibroblasts (HGF-1) in the transmucosal region. Two types of titanium (Ti) and Ce-TZP/Al2O3 disks with different surface roughness profiles were prepared (Ra0.9 and Ra0.02). Surface properties were evaluated using SEM, EDX, and wettability analysis. Biological parameters including cell adhesion, proliferation and morphology, collagen deposition, and inflammatory cytokine expression were evaluated for each disk. Surface morphology analysis of Ce-TZP/Al2O3 and Ti elucidated the uniform linear structures of Ra0.9 and the smooth and flat structures of Ra0.02. Cell morphology showed spindle-shaped and large, circular forms, respectively. Cell adhesion and proliferation and collagen deposition were significantly increased on Ce-TZP/Al2O3 Ra0.02 disk compared with the others, with no significant differences in cytokine expression among all the disks. The reduced surface roughness of Ce-TZP/Al2O3 was advantageous for promoting biological effects in the transmucosal region.
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Affiliation(s)
- Yuri Akiyama
- Department of Prosthodontics, School of Dentistry, Showa University
| | - Fuminori Iwasa
- Department of Prosthodontics, School of Dentistry, Showa University
| | - Yasuhiro Hotta
- Department of Conservative Dentistry, Division of Biomaterials and Engineering, School of Dentistry, Showa University
| | | | - Yoko Oshima
- Department of Prosthodontics, School of Dentistry, Showa University
| | - Kazuyoshi Baba
- Department of Prosthodontics, School of Dentistry, Showa University
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20
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Bahammam MA, Attia MS. Expression of Vascular Endothelial Growth Factor Using Platelet Rich Fibrin (PRF) and Nanohydroxyapatite (nano-HA) in Treatment of Periodontal Intra-Bony Defects - A Randomized Controlled Trial. Saudi J Biol Sci 2020; 28:870-878. [PMID: 33424378 PMCID: PMC7783819 DOI: 10.1016/j.sjbs.2020.11.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 11/03/2020] [Accepted: 11/03/2020] [Indexed: 11/28/2022] Open
Abstract
The study aims to assess the concentration of vascular endothelial growth factors (VEGF) with platelet rich fibrin (PRF) biomaterial, while using it separately or in combination with nanohydroxyapatite (nano-HA) for treating intra-bony defects (IBDs) using radiographic evaluation (DBS-Win software). Sixty patients with IBD (one site/patient) and chronic periodontitis were recruited randomly to test either autologous PRF platelet concentrate, nano-HA bone graft, a combination of PRF platelet concentrate and nano-HA, or alone conventional open flap debridement (OFD). Recordings of clinical parameters including probing depth (PD), gingival index (GI), and clinical attachment level (CAL) were obtained at baseline and 6 months, post-operatively. One-way analysis of variance (ANOVA) was used to compare four groups; whereas, multiple comparisons were done through Tukey’s post hoc test. The results showed that CAL at baseline changed from 6.67 ± 1.23 to 4.5 ± 1.42 in group I, 6.6 ± 2.51 to 4.9 ± 1.48 in group II, 5.2 ± 2.17 to 3.1 ± 1.27 in group III, and 4.7 ± 2.22 to 3.7 ± 2.35 in group IV after 6 months. The most significant increase in bone density and fill was observed for IBD depth in group III that was recorded as 62.82 ± 24.6 and 2.31 ± 0.75 mm, respectively. VEGF concentrations were significantly increased at 3, 7, and 14 days in all groups. The use of PRF with nano-HA was successful regenerative periodontal therapy to manage periodontal IBDs, unlike using PRF alone. Increase in VEGF concentrations in all group confirmed its role in angiogenesis and osteogenesis in the early stages of bone defect healing.
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Key Words
- ANOVA, One-way analysis of variance
- CAL, Clinical attachment level
- CaP, Calcium phosphate
- DFDBA, Demineralized freeze-dried bone allograft
- ELISA, Enzyme-linked immunosorbent assay
- GCF, Gingival Clavicular Fluid
- GI, Gingival Index
- IBD, Intra-Bony Defect
- Intra-Bony Defects
- Nano-HA, Nanohydroxyapatite
- Nanohydroxyapatite
- OFD, Open flap debridement
- PD, Probing depth
- PPP, Platelet‑poor plasma
- PRF, Platelet rich fibrin
- PRP, Platelet rich plasma
- Periodontal Regeneration
- Periodontitis
- Platelet-Rich Fibrin
- Rpm, Revolutions per minute
- SD, Standard Deviation
- SPSS 20®, Statistical Package for Social Science
- VEGF, Vascular Endothelial Growth Factor
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Affiliation(s)
- Maha A Bahammam
- Department of Periodontology, Faculty of Dentistry, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia
| | - Mai S Attia
- Department of Periodontology, Faculty of Dentistry, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia.,Department of Oral Medicine, Periodontology, and Oral Diagnosis; Faculty of Dentistry; Al Azhar University, Cairo, Egypt
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21
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Sun L, Hong G, Matsui H, Song YJ, Sasaki K. The Effects of Syndecan on Osteoblastic Cell Adhesion Onto Nano-Zirconia Surface. Int J Nanomedicine 2020; 15:5061-5072. [PMID: 32764936 PMCID: PMC7372001 DOI: 10.2147/ijn.s263053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 07/04/2020] [Indexed: 11/25/2022] Open
Abstract
Purpose Zirconia is one of the most promising implant materials due to its favorable physical, mechanical and biological properties. However, until now, we know little about the mechanism of osseointegration on zirconia. The purpose of this study is to evaluate the effect of Syndecan (Sdc) on osteoblastic cell (MC3T3-E1) adhesion and proliferation onto zirconia materials. Materials and Methods The mirror-polished disks 15 mm in diameter and 1.5 mm in thick of commercial pure titanium (CpTi), 3mol% yttria-stabilized tetragonal zirconia polycrystalline (3Y-TZP) and nano-zirconia (NanoZr) are used in this study. MC3T3-E1 cells were seeded onto specimen surfaces and subjected to RNA interference (RNAi) for Syndecan-1, Syndecan-2, Syndecan-3, and Syndecan-4. At 48h post-transfection, the cell morphology, actin cytoskeleton, and focal adhesion were observed using scanning electron microscopy or laser scanning confocal fluorescence microscopy. At 24h and 48h post-transfection, cell counting kit-8 (CCK-8) assay was used to investigate cell proliferation. Results The cell morphology of MC3T3-E1 cells on CpTi, 3Y-TZP, and NanoZr changed into abnormal shape after gene silencing of Syndecan. Among the Syndecan family, Sdc-2 is responsible for NanoZr-specific morphology regulation, via maintenance of cytoskeletal conformation without affecting cellular attachment. According to CCK-8 assay, Sdc-2 affects the osteoblastic cell proliferation onto NanoZr. Conclusion Within the limitation of this study, we suggest that Syndecan affects osteoblastic cell adhesion on CpTi, 3Y-TZP, and NanoZr. Sdc-2 might be an important heparin-sensitive cell membrane regulator in osteoblastic cell adhesion, specifically on NanoZr, through the organization of actin cytoskeleton and affects osteoblastic cell proliferation.
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Affiliation(s)
- Lu Sun
- Division of Advanced Prosthetic Dentistry, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Guang Hong
- Division for Globalization Initiative, Liaison Center for Innovative Dentistry, Graduate School of Dentistry, Tohoku University, Sendai, Japan.,Department of Prosthodontics, Faculty of Dental Medicine, Airlangga University, Surabaya, Indonesia
| | - Hiroyuki Matsui
- Division of Advanced Prosthetic Dentistry, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Yun-Jia Song
- Division of Advanced Prosthetic Dentistry, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Graduate School of Dentistry, Tohoku University, Sendai, Japan
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22
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Munro T, Miller CM, Antunes E, Sharma D. Interactions of Osteoprogenitor Cells with a Novel Zirconia Implant Surface. J Funct Biomater 2020; 11:E50. [PMID: 32708701 PMCID: PMC7565437 DOI: 10.3390/jfb11030050] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 07/10/2020] [Accepted: 07/12/2020] [Indexed: 02/03/2023] Open
Abstract
Background: This study compared the in vitro response of a mouse pre-osteoblast cell line on a novel sandblasted zirconia surface with that of titanium. Material and Methods: The MC3T3-E1 subclone 4 osteoblast precursor cell line was cultured on either sandblasted titanium (SBCpTi) or sandblasted zirconia (SBY-TZP). The surface topography was analysed by three-dimensional laser microscopy and scanning electron microscope. The wettability of the discs was also assessed. The cellular response was quantified by assessing the morphology (day 1), proliferation (day 1, 3, 5, 7, 9), viability (day 1, 9), and migration (0, 6, 24 h) assays. Results: The sandblasting surface treatment in both titanium and zirconia increased the surface roughness by rendering a defined surface topography with titanium showing more apparent nano-topography. The wettability of the two surfaces showed no significant difference. The zirconia surface resulted in improved cellular spreading and a significantly increased rate of migration compared to titanium. However, the cellular proliferation and viability noted in our experiments were not significantly different on the zirconia and titanium surfaces. Conclusions: The novel, roughened zirconia surface elicited cellular responses comparable to, or exceeding that, of titanium. Therefore, this novel zirconia surface may be an acceptable substitute for titanium as a dental implant material.
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Affiliation(s)
- Thomas Munro
- College of Medicine and Dentistry, James Cook University, 14-88 McGregor Road, Smithfield 4878, QLD, Australia;
| | - Catherine M. Miller
- College of Public Health, Medical and Veterinary Sciences, James Cook University, 14-88 McGregor Road, Smithfield 4878, QLD, Australia;
- The Australian Institute of Tropical Health and Medicine (AITHM) James Cook University, 14-88 McGregor Road, Smithfield 4878, QLD, Australia
| | - Elsa Antunes
- College of Science & Engineering, James Cook University, 1 James Cook Drive, Douglas, Townsville 4814, QLD, Australia;
| | - Dileep Sharma
- College of Medicine and Dentistry, James Cook University, 14-88 McGregor Road, Smithfield 4878, QLD, Australia;
- The Australian Institute of Tropical Health and Medicine (AITHM) James Cook University, 14-88 McGregor Road, Smithfield 4878, QLD, Australia
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Han A, Tsoi JKH, Lung CYK, Matinlinna JP. An introduction of biological performance of zirconia with different surface characteristics: A review. Dent Mater J 2020; 39:523-530. [PMID: 32507797 DOI: 10.4012/dmj.2019-200] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Zirconia (ZrO2) ceramic is widely used in dentistry as a clinical dental biomaterial. In this review, we are focusing on and summarizing the biological performance of zirconia under different surface characteristics. We have included an initial tissue cell attachment study on zirconia and bacterial adhesion on zirconia. Our results suggest that surface modifications applied on zirconia may change the interfacial surface characteristics e.g. surface roughness, surface free energy, and chemistry of zirconia. The modifications also result in advanced biological performance of zirconia, including enhanced tissue cell attachment and reduction of bacterial adhesion. The recent laboratory research has provided many interesting modification methods and showed clinically interesting and promising outcomes. A few of the outcomes are validated and have been applied in clinical dentistry.
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Affiliation(s)
- Aifang Han
- Dental Materials Science, Applied Oral Sciences, Faculty of Dentistry, The University of Hong Kong
| | - James K H Tsoi
- Dental Materials Science, Applied Oral Sciences, Faculty of Dentistry, The University of Hong Kong
| | - Christie Y K Lung
- Dental Materials Science, Applied Oral Sciences, Faculty of Dentistry, The University of Hong Kong
| | - Jukka P Matinlinna
- Dental Materials Science, Applied Oral Sciences, Faculty of Dentistry, The University of Hong Kong
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Ziąbka M, Kiszka J, Trenczek-Zając A, Radecka M, Cholewa-Kowalska K, Bissenik I, Kyzioł A, Dziadek M, Niemiec W, Królicka A. Antibacterial composite hybrid coatings of veterinary medical implants. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 112:110968. [PMID: 32409094 DOI: 10.1016/j.msec.2020.110968] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 04/11/2020] [Accepted: 04/12/2020] [Indexed: 01/07/2023]
Abstract
The aim of the work was to develop innovative antibacterial hybrid coatings applied on implants that are used for anastomoses of animals' long bones and to assess their physicochemical and biological properties. Plates made of the titanium alloy were covered with composite hybrid layers so as to protect the implant surface against corrosion and to enhance it with antibacterial properties.The hybrid coatings were obtained electrochemical oxidation and sol-gel. First, a layer of titanium nanotubes was applied to the implants surface through anodization. Next, the sol-gel method was used to create the second layer with silver nanoparticles. The microstructure examination of the materials was performed with the SEM. The phase composition analysis was carried out via the X-ray diffraction. The surface parameters (roughness, contact angle and free surface energy) were assessed. Biological studies of implants were conducted, including the analysis of degradation processes, cell response and bactericidal activity. The results confirmed that the hybrid antibacterial layers effectively protected the implant surface against scratches and corrosion and eliminated bacteria, which in turn would promote bone healing. The advantageous physicochemical and biological properties of metallic implants with hybrid composite layers raise hopes for their applicability in the veterinary treatment of bone fractures.
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Affiliation(s)
- Magdalena Ziąbka
- Department of Ceramics and Refractories, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Krakow 30-059, Poland.
| | - Joanna Kiszka
- Faculty of Electrical Engineering, Automatics, Computer Science and Biomedical Engineering, AGH University of Science and Technology, Krakow 30-059, Poland
| | - Anita Trenczek-Zając
- Department of Inorganic Chemistry, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Krakow 30-059, Poland.
| | - Marta Radecka
- Department of Inorganic Chemistry, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Krakow 30-059, Poland.
| | - Katarzyna Cholewa-Kowalska
- Department of Glass Technology and Amorphous Coatings, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, 30-059 Krakow, Poland.
| | | | - Agnieszka Kyzioł
- Faculty of Chemistry, Jagiellonian University, 30-387 Krakow, Poland.
| | - Michał Dziadek
- Department of Glass Technology and Amorphous Coatings, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, 30-059 Krakow, Poland; Faculty of Chemistry, Jagiellonian University, 30-387 Krakow, Poland.
| | - Wiktor Niemiec
- Department of Silicates and Macromolecular Compounds, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Krakow 30-059, Poland.
| | - Aleksandra Królicka
- University of Gdansk, Intercollegiate Faculty of Biotechnology UG-MUG, Laboratory of Biologically Active Compounds, Gdansk 80-307, Poland.
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25
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Relationship between the Surface Roughness of Biodegradable Mg-Based Bulk Metallic Glass and the Osteogenetic Ability of MG63 Osteoblast-Like Cells. MATERIALS 2020; 13:ma13051188. [PMID: 32155846 PMCID: PMC7085092 DOI: 10.3390/ma13051188] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 03/03/2020] [Accepted: 03/04/2020] [Indexed: 11/17/2022]
Abstract
Mg-based bulk metallic glass materials have been investigated for their large potential for application in orthopedic implants due to their biocompatibility, low degradation rate, and osteogenetic ability. As an orthopedic implant, initial cell adhesion has been a critical issue for subsequent osteogenesis and bone formation because the first contact between cells and the implant occurs upon the implants surface. Here, we aimed to create Mg-based bulk metallic glass samples with three different surface roughness attributes in order to understand the degradation behavior of Mg-based bulk metallic glass and the adhesion ability and osteogenetic ability of the contact cells. It was found that the degradation behavior of Mg66Zn29Ca5 bulk metallic glass was not affected by surface roughness. The surface of the Mg66Zn29Ca5 bulk metallic glass samples polished via #800 grade sandpaper was found to offer a well-attached surface and to provide a good cell viability environment for Human MG63 osteoblast-like cell line. In parallel, more calcium and mineral deposition was investigated on extracellular matrix with higher surface roughness that verify the relationship between surface roughness and cell performance.
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26
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Abstract
This review describes low temperature degradation (LTD), discoloration, and erosion of high translucent dental zirconia and discusses its chemical durability in comparison with other CAD/CAM materials. The LTD of zirconia strongly depended on the firing temperature, yttria content, surface treatment, and heat treatment. Glass ceramics for CAD/CAM were remarkably etched in a lactic acid at 60°C, KOH solution at 60°C, and saline solution at 90°C, whereas zirconia showed no changes in these solutions. Glass ceramics and hybrid resins for CAD/CAM showed significant discoloration in a red wine and rhodamine B solution at 37°C, whereas zirconia showed no discolorations in either solution. It was concluded that high translucent dental zirconia has the highest chemical durability among dental CAD/CAM materials.
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Affiliation(s)
- Seiji Ban
- Department of Dental Materials Science, School of Dentistry, Aichi Gakuin University
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27
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Fu C, Pan S, Ma Y, Kong W, Qi Z, Yang X. Effect of electrical stimulation combined with graphene-oxide-based membranes on neural stem cell proliferation and differentiation. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2019; 47:1867-1876. [PMID: 31076002 DOI: 10.1080/21691401.2019.1613422] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The combination of composite nerve materials prepared using degradable polymer materials with biological or physical factors has received extensive attention as a means to treat nerve injuries. This study focused on the potential application of graphene oxide (GO) composite conductive materials combined with electrical stimulation (ES) in nerve repair. A conductive poly(L-lactic-co-glycolic acid) (PLGA)/GO composite membrane was prepared, and its properties were tested using a scanning electron microscope (SEM), a contact angle meter, and a mechanical tester. Next, neural stem cells (NSCs) were planted on the PLGA/GO conductive composite membrane and ES was applied. NSC proliferation and differentiation and neurite elongation were observed using a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, immunofluorescence, and PCR, respectively. The results showed that the PLGA/GO membrane had good hydrophilicity, mechanical strength, and protein adsorption. ES combined with the PLGA/GO membrane significantly promoted NSC proliferation and neuronal differentiation on the material surface and promoted significant neurite elongation. Our results suggest that ES combined with GO-related conductive composite materials can be used as a new therapeutic combination to treat nerve injuries.
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Affiliation(s)
- Chuan Fu
- a Department of Orthopedic Surgery , The Second Hospital of Jilin University , Changchun TX , PR China
| | - Su Pan
- a Department of Orthopedic Surgery , The Second Hospital of Jilin University , Changchun TX , PR China
| | - Yue Ma
- b Department of gynecological oncology, the First Hospital of Jilin University , Changchun TX , PR China
| | - Weijian Kong
- a Department of Orthopedic Surgery , The Second Hospital of Jilin University , Changchun TX , PR China
| | - Zhiping Qi
- a Department of Orthopedic Surgery , The Second Hospital of Jilin University , Changchun TX , PR China
| | - Xiaoyu Yang
- a Department of Orthopedic Surgery , The Second Hospital of Jilin University , Changchun TX , PR China
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28
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Qu Y, Hong G, Liu L, Sasaki K, Chen X. Evaluation of silk fibroin electrogel coating for zirconia material surface. Dent Mater J 2019; 38:813-820. [PMID: 31341146 DOI: 10.4012/dmj.2018-228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Zirconia is commonly used in dental applications. It has been reported that surface-modified zirconia implants showed better performance in vivo than machined zirconia implants. Silk fibroin electrogel is a good candidate for controlled drug delivery; however, the use of silk fibroin electrogel on zirconia implants has not previously been reported. The aim of this study was to investigate a method to coat zirconia implants with silk fibroin electrogel and evaluate the mechanical and biological properties of the coating. The results show that the wettability of the coating was close to that of sand-blasted and acid-etched (SLA)-treated zirconia, and the bond strength was larger than that of the coating prepared from silk fibroin aqueous solution. ATR-FTIR spectra provided evidence that the secondary structure changed during the electrogelation process. Culturing cells on the coating revealed its nontoxicity to osteoblast-like cells. Thus, it can be suggested that a silk fibroin electrogel coating is a promising biocompatible and degradable drugdelivery material for zirconia implants.
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Affiliation(s)
- Yinying Qu
- Department of Orthodontics, Dalian Stomatological Hospital.,Division of Advanced Prosthetic Dentistry, Graduate School of Dentistry, Tohoku University
| | - Guang Hong
- Liaison Center for Innovative Dentistry, Graduate School of Dentistry, Tohoku University.,Faculty of Dental Medicine, Airlangga University
| | - Lin Liu
- Department of Orthodontics, Dalian Stomatological Hospital
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Graduate School of Dentistry, Tohoku University
| | - Xiaodong Chen
- Department of Prosthetics, Dalian Stomatological Hospital
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29
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Nanostructured Zirconia-Based Ceramics and Composites in Dentistry: A State-of-the-Art Review. NANOMATERIALS 2019; 9:nano9101393. [PMID: 31569589 PMCID: PMC6836160 DOI: 10.3390/nano9101393] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Revised: 09/18/2019] [Accepted: 09/25/2019] [Indexed: 12/12/2022]
Abstract
The objective of this paper is to review the current knowledge on the development of nanostructured zirconia-based ceramics and composites suitable for application in dentistry. Isi Web of Science, Science Direct, Scientific.net databases, and Google were searched electronically for the period of 1980 to the present, matching the keywords “nano” with the keywords: “Zirconia, ZrO2, Y-TZP, and dental, dentistry”. A total of 74 papers were found, with the majority coming from Asia, indicating a more active scientific interest on the topic in this geographic area, followed by Europe, South America, and North America. The research shows, even though the scientific activity on nanostructured ceramics was intense in the last fifteen years, the development of fully dense zirconia-based nanoceramics is yet at an initial stage, most of all from the point of view of the clinical applications. It has been demonstrated that nanostructured ceramics can show improved properties because of the reduction of the grain size to the nanoscale. This is also true for zirconia-based nanoceramics, where some improvements in mechanical, optical, as well as resistance in low-temperature degradation have been observed. Potential applications of this class of material in the dental field are discussed, summarizing the results of the latest scientific research.
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30
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Skwira A, Szewczyk A, Prokopowicz M. The Effect of Polydimethylsiloxane-Ethylcellulose Coating Blends on the Surface Characterization and Drug Release of Ciprofloxacin-Loaded Mesoporous Silica. Polymers (Basel) 2019; 11:E1450. [PMID: 31487861 PMCID: PMC6780097 DOI: 10.3390/polym11091450] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 09/02/2019] [Accepted: 09/02/2019] [Indexed: 12/22/2022] Open
Abstract
In this study, we obtained novel solid films composed of ciprofloxacin-loaded mesoporous silica materials (CIP-loaded MCM-41) and polymer coating blends. Polymer coating blends were composed of ethylcellulose (EC) with various levels of polydimethylsiloxane (PDMS, 0, 1, 2% (v/v)). The solid films were prepared via the solvent-evaporation molding method and characterized by using scanning electron microscopy (SEM), optical profilometry, and wettability analyses. The solid-state of CIP present in the solid films was studied using X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The release profiles of CIP were examined as a function of PDMS content in solid films. The surface morphology analysis of solid films indicated the progressive increase in surface heterogeneity and roughness with increasing PDMS content. The contact angle study confirmed the hydrophobicity of all solid films and significant impact of both PDMS and CIP-loaded MCM-41 on surface wettability. DSC and XRD analysis confirmed the presence of amorphous/semi-crystalline CIP in solid films. The Fickian diffusion-controlled drug release was observed for the CIP-loaded MCM-41 coated with PDMS-free polymer blend, whereas zero-order drug release was noticed for the CIP-loaded MCM-41 coated with polymer blends enriched with PDMS. Both the release rate and initial burst of CIP decreased with increasing PDMS content.
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Affiliation(s)
- Adrianna Skwira
- Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, Hallera 107, Gdańsk 80-416, Poland
| | - Adrian Szewczyk
- Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, Hallera 107, Gdańsk 80-416, Poland
| | - Magdalena Prokopowicz
- Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, Hallera 107, Gdańsk 80-416, Poland.
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31
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Barros SADL, Soares DG, Leite ML, Basso FG, Costa CADS, Adabo GL. Influence of Zirconia-Coated Bioactive Glass on Gingival Fibroblast Behavior. Braz Dent J 2019; 30:333-341. [PMID: 31340222 DOI: 10.1590/0103-6440201902417] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 02/19/2019] [Indexed: 11/22/2022] Open
Abstract
The objective of this study was the development of a bioactive glass coating on zirconia (Zr) to modulate the gingival fibroblast phenotype. For this purpose, Biosilicate® (BS) particles in a water/isopropyl alcohol (1:1) vehicle (6 mg/mL) were applied to zirconia discs followed by thermal treatment at 1100 °C for 20 min. The surface topography (SEM), chemical composition (EDX), surface roughness (Ra; confocal microscopy), surface free energy (goniometry), and color alteration (UV-vis spectrophotometry) were assessed (n=6). Thereafter, L929 fibroblasts were seeded onto Zr and Zr+BS discs, and cell proliferation (Alamar Blue; n=6), morphology (SEM; n=2), migration (wound healing; n=4), and collagen synthesis (Sirius Red; n=6) were evaluated up to 7 days. Data were analyzed by ANOVA/Tukey tests (a=5%). A homogeneous coating consisting of Si, Na, O, and Ca was detected on the Zr surface after thermal treatment with BS, which led to a significant increase in surface roughness and free energy (p<0.05). No change in color parameters was observed (p>0.05). Cells seeded on the Zr+BS surface featured increased proliferation, collagen expression, and migration capability in comparison with those cultured on plain Zr (p<0.05). SEM images revealed that cell spreading occurred faster in the presence of BS. Therefore, it was concluded that thermal treatment of the Zr surface with BS led to the deposition of a bioactive coating, which induced gingival fibroblast spread, proliferation, migration, and collagen expression in vitro.
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Affiliation(s)
- Suelen Aline de Lima Barros
- Department of Dental Materials and Prosthodontics, Araraquara School of Dentistry, UNESP -Universidade Estadual Paulista, Araraquara, SP, Brazil
| | - Diana Gabriela Soares
- Department of Operative Dentistry, Endodontics and Dental Materials, USP - Universidade de São Paulo, Bauru, SP, Brazil
| | - Maria Luísa Leite
- Department of Dental Materials and Prosthodontics, Araraquara School of Dentistry, UNESP -Universidade Estadual Paulista, Araraquara, SP, Brazil
| | - Fernanda Gonçalves Basso
- Department of Physiology and Pathology, Araraquara School of Dentistry, UNESP - Universidade Estadual Paulista, Araraquara, SP, Brazil
| | - Carlos Alberto de Souza Costa
- Department of Physiology and Pathology, Araraquara School of Dentistry, UNESP - Universidade Estadual Paulista, Araraquara, SP, Brazil
| | - Gelson Luís Adabo
- Department of Dental Materials and Prosthodontics, Araraquara School of Dentistry, UNESP -Universidade Estadual Paulista, Araraquara, SP, Brazil
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32
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Extra low interstitial titanium based fully porous morphological bone scaffolds manufactured using selective laser melting. J Mech Behav Biomed Mater 2019; 95:1-12. [DOI: 10.1016/j.jmbbm.2019.03.025] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 03/12/2019] [Accepted: 03/22/2019] [Indexed: 12/20/2022]
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33
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Moura CEB, Queiroz Neto MF, Braz JKFS, de Medeiros Aires M, Silva Farias NB, Barboza CAG, Cavalcanti Júnior GB, Rocha HAO, Alves Junior C. Effect of plasma-nitrided titanium surfaces on the differentiation of pre-osteoblastic cells. Artif Organs 2019; 43:764-772. [PMID: 30779451 DOI: 10.1111/aor.13438] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 01/07/2019] [Accepted: 02/16/2019] [Indexed: 12/15/2022]
Abstract
A titanium surface nitrided by plasma contains nitrogen ions that guarantee resistance to corrosion and biocompatibility. Despite this, no descriptions concerning the influence of the expression of cell adhesion proteins and their influence on osteogenic cell differentiation are available. Thus, the present study aimed to assess the response of murine pre-osteoblastic cells (MC3T3-E1) cultured on nitrided titanium surfaces. Pre-osteoblastic cells were grown on polished titanium discs, used as controls, and on previously characterized plasma-nitrided titanium discs. Cells from both groups were submitted to the MTT cell viability test. The expressions of α5, α2, and β1 integrin were assessed by flow cytometry and immunofluorescence, while osteocalcin expression was assessed by flow cytometry. The nitrided surface presented higher α2 and β1 integrin expressions, as well as osteocalcin expression, when compared to the polished surface, with no alterations in cell viability. These findings seem to suggest that the plasma nitriding treatment produces a titanium surface with the potential for effective in vitro osseointegration.
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Affiliation(s)
- Carlos Eduardo B Moura
- Department of Animal Sciences, Federal Rural University of Semiarid Region (UFERSA), Mossoró, Brazil
| | - Moacir F Queiroz Neto
- Department of Animal Sciences, Federal Rural University of Semiarid Region (UFERSA), Mossoró, Brazil
| | - Janine Karla F S Braz
- Department of Animal Sciences, Federal Rural University of Semiarid Region (UFERSA), Mossoró, Brazil
| | | | - Naisandra B Silva Farias
- Department of Animal Sciences, Federal Rural University of Semiarid Region (UFERSA), Mossoró, Brazil
| | - Carlos Augusto G Barboza
- Department of Animal Sciences, Federal Rural University of Semiarid Region (UFERSA), Mossoró, Brazil
| | | | - Hugo Alexandre O Rocha
- Department of Animal Sciences, Federal Rural University of Semiarid Region (UFERSA), Mossoró, Brazil
| | - Clodomiro Alves Junior
- Department of Animal Sciences, Federal Rural University of Semiarid Region (UFERSA), Mossoró, Brazil
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34
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Attia MS, Mohammed HM, Attia MG, Hamid MAAE, Shoeriabah EA. Histological and histomorphometric evaluation of hydroxyapatite-based biomaterials in surgically created defects around implants in dogs. J Periodontol 2018; 90:281-287. [PMID: 30367741 DOI: 10.1002/jper.17-0469] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 07/06/2018] [Accepted: 08/06/2018] [Indexed: 11/05/2022]
Abstract
BACKGROUND The present study evaluated histologically and histometrically the efficacy of micro-, nano-, or mixed-composite of hydroxyapatite (HA) graft in treatment of surgically created defects around dental implants in mongrel dogs. METHODS Immediate implant was used after extraction of the lower third premolar in mongrel male dogs. Critical-size defects were created in intact proximal alveolar bone to each implant. The defects were divided randomly into four groups of two animals based on biomaterials used for treatment: 1) received no treatment (negative control); 2) defects treated with nano-HA bone graft; 3) defects treated with micro-HA bone graft; and 4) defects treated with a mixed composite of micro-HA and nano-HA. Animals were sacrificed at 2 months and histologic and histometric evaluation was performed. RESULTS The amount of new bone formed with nano-HA bone graft was highly more significant than that obtained by a micro- or mixed-composite of hydroxyapatite. Defects treated by mixed hydroxyapatite showed the greatest value in mean area percentage of collagen fibers using Masson trichrome stain. CONCLUSIONS The present study demonstrated that nano-hydroxyapatite bone graft was better than micro-HA or mixed-HA bone graft in new bone formation in standardized surgically created defects around dental implants. However, longer period is necessary to determine the time taken for complete resorption of bone graft materials and their replacement with new bone.
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Affiliation(s)
- Mai S Attia
- Department of Oral Medicine, Periodontology, Diagnosis and Radiology, Faculty of Dental Medicine, Al-Azhar University (Girls Branch), Cairo, Egypt
| | - Hend M Mohammed
- Department of Oral Medicine, Periodontology, Diagnosis and Radiology, Faculty of Dental Medicine, Al-Azhar University (Girls Branch), Cairo, Egypt
| | - Mohammed G Attia
- Department of Oral Pathology, Faculty of Dental Medicine, Al-Azhar University (Boys Branch), Cairo, Egypt
| | - Mohamed A Abd El Hamid
- Department of Surgery, Anesthesia and Radiology, Faculty of Veterinary Medicine, Cairo University, Cairo, Egypt
| | - Eatemad A Shoeriabah
- Department of Oral Medicine, Periodontology, Diagnosis and Radiology, Faculty of Dental Medicine, Al-Azhar University (Girls Branch), Cairo, Egypt
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35
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Ziąbka M, Menaszek E, Tarasiuk J, Wroński S. Biocompatible Nanocomposite Implant with Silver Nanoparticles for Otology-In Vivo Evaluation. NANOMATERIALS 2018; 8:nano8100764. [PMID: 30262741 PMCID: PMC6215221 DOI: 10.3390/nano8100764] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 09/20/2018] [Accepted: 09/25/2018] [Indexed: 02/06/2023]
Abstract
The aim of this work was to investigate of biocompatibility of polymeric implants modified with silver nanoparticles (AgNPs). Middle ear prostheses (otoimplants) made of the (poly)acrylonitrile butadiene styrene (ABS) and ABS modified with silver nanoparticles were prepared through extrusion and injection moulding process. The obtained prostheses were characterized by SEM-EDX, micro-CT and mechanical tests, confirming their proper shape, good AgNPs homogenization and mechanical parameters stability. The biocompatibility of the implants was evaluated in vivo on rats, after 4, 12, 24 and 48 weeks of implantation. The tissue-healing process and cytotoxicity of the implants were evaluated on the basis of microscopic observations of the materials morphology after histochemical staining with cytochrome c oxidase (OCC) and acid phosphatase (AP), as well as via micro-tomography (ex vivo). The in vivo studies confirmed biocompatibility of the implants in the surrounding tissue environment. Both the pure ABS and nanosilver-modified ABS implants exhibited a distinct decrease in the area of granulation tissue which was replaced with the regenerating muscle tissue. Moreover, a slightly smaller area of granulation tissue was observed in the surroundings of the silver-doped prosthesis than in the case of pure ABS prosthesis. The kinetics of silver ions releasing from implants was investigated by ICP-MS spectrometry. The measurement confirmed that concentration of the silver ions increased within the implant’s immersion period. Our results showed that middle ear implant with the nanoscale modification is biocompatible and might be used in ossicular reconstruction.
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Affiliation(s)
- Magdalena Ziąbka
- Department of Ceramics and Refractories, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, 30-059 Krakow, Poland.
| | - Elżbieta Menaszek
- Department of Cytobiology, Collegium Medicum, Faculty of Pharmacy, UJ Jagiellonian University, 30-001 Krakow, Poland.
| | - Jacek Tarasiuk
- Department of Condensed Matter Physics, Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, 30-059 Krakow, Poland.
| | - Sebastian Wroński
- Department of Condensed Matter Physics, Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, 30-059 Krakow, Poland.
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Aivazi M, Fathi M, Nejatidanesh F, Mortazavi V, Hashemi Beni B, Matinlinna JP. Effect of Surface Modification on Viability of L929 Cells on Zirconia Nanocomposite Substrat. J Lasers Med Sci 2018; 9:87-91. [PMID: 30026892 DOI: 10.15171/jlms.2018.18] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Introduction: Zirconia bioceramic can be considered for metallic replacement in dental implant applications. A proper method of surface modification may promote better osseointegration. Methods: In study evaluated viability of fibroblast cell following surface treatment. Therefore, viability L929 cells were characterized using MTT assay and scanning electron microscopy. Results: The viability assessment determined significant differences A-Y-TZP20 without surface treatment as compared to laser surface treatment (B), laser surface treatment + hydroxyapatiteyttrium stabilized tetragonal zirconia nanocomposite coat (C) and control. This study demonstrated that L929 cells approximately proliferated and spread on A-Y-TZP20 nanocomposite disk in laser surface treatment(B), Laser surface treatment + hydroxiapatite-yttrium stabilized tetragonal zirconia nanocomposite coat (C) groups similar to control group. Conclusion: Laser surface treatment showed positive effect on the viability of L929 cells.
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Affiliation(s)
- Moluk Aivazi
- Biomaterials Research Group, Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran
| | - Mohammadhossein Fathi
- Dental Materials Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Farahnaz Nejatidanesh
- Dental Materials Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Vajihesadat Mortazavi
- Torabinejad Dental Research Center, Department of Operative Dentistry, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Batoul Hashemi Beni
- Department of Anatomical Sciences and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Jukka Pekka Matinlinna
- Dental Material Science, Head of Unit, Faculty of Dentistry, The University of Hong Kong, 4/FDental Material Science, The Prince Philip Dental Hospital, 34Hospital Road, Sai Ying Pun, Hong Kong
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Igarashi K, Nakahara K, Kobayashi E, Watanabe F, Haga-Tsujimura M. Hard and soft tissue responses to implant made of three different materials with microgrooved collar in a dog model. Dent Mater J 2018; 37:964-972. [PMID: 29998938 DOI: 10.4012/dmj.2017-197] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The objective of the present study was to assess hard and soft tissue around dental implants made of three different materials with microgrooves on the collar surface. Microgrooved implants were inserted in the mandibles of five male beagles. Implants were made of three kinds of material; titanium (Ti), yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) and ceria partially stabilized zirconia/alumina nanocomposite (Ce-TZP/Al2O3). The animals were euthanatized at three months after implantation, and harvested tissue was analyzed by means of histology. All kinds of implant were osseointegrated, and there were no significant differences in any histomorphometric parameters among the three groups of microgrooved implants made of different materials. Within the limitations of this study, implants with microgrooves integrated into the surrounding bone tissue, without statistically significant differences among the three tested materials, Ti, Y-TZP, and Ce-TZP/Al2O3.
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Affiliation(s)
- Kensuke Igarashi
- Department of Life Science Dentistry, The Nippon Dental University
| | - Ken Nakahara
- Advanced Research Center, The Nippon Dental University School of Life Dentistry at Niigata
| | - Eizaburo Kobayashi
- Department of Oral and Maxillofacial Surgery, The Nippon Dental University School of Life Dentistry at Niigata
| | - Fumihiko Watanabe
- Department of Crown and Bridge Prosthodontics, The Nippon Dental University School of Life Dentistry at Niigata
| | - Maiko Haga-Tsujimura
- Department of Histology, The Nippon Dental University School of Life Dentistry at Niigata
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Nassif W, Rifai M. Surface Characterization and Cell Adhesion of Different Zirconia Treatments: An in vitro Study. J Contemp Dent Pract 2018; 19:181-188. [PMID: 29422468 DOI: 10.5005/jp-journals-10024-2234] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
AIM The aim of this study was to characterize the surface of zirconia subjected to different treatments and evaluate its effect on cell adhesion and proliferation. MATERIALS AND METHODS A total of 80 zirconia disks were divided into four groups (n = 20) according to the surface treatments used: group I: as-sintered (AS), no surface treatment applied; group II: abrasion treatment applied using Rocatec (ROC; 3M ESPE) system with silica-coated alumina powder of grit size 110 μm; group III: erbium, chromium:yttrium, scandium, gallium, garnet (Er, Cr:YSGG) laser (LAS; BIOLASE) was used at a frequency of 20 Hz and output power of 3 W; and group IV: specimens were subjected to the selective infiltration etching (SIE) technique. Surface characterization was evaluated for the different groups (roughness, hardness, and morphology), and cell behavior (adhesion and proliferation) was tested (a = 0.05). RESULTS The ROC group reported a significant increase in surface roughness (2.201 ± 0.352) and Vickers hardness (1758 ± 16.6) compared with the other surface treatments. The SIE surface-treated group reported a significantly higher number of cells (64.5 ± 2.6 and 53.5 ± 2.2 respectively) compared with the other surface-treated groups. CONCLUSION The SIE is a promising surface treatment for zirconia that significantly enhances cell adhesion and osseointegration. CLINICAL SIGNIFICANCE The SIE treatment of zirconia implants may help in a faster and better osseointegration.
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Affiliation(s)
- Wadih Nassif
- Department of Prosthodontics, Faculty of Dental Medicine Lebanese University, Beirut, Lebanon, Phone: +9613686787, e-mail:
| | - Mohamad Rifai
- Department of Prosthodontics, Faculty of Dental Medicine Lebanese University, Beirut, Lebanon
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Murakami T, Takemoto S, Nishiyama N, Aida M. Zirconia surface modification by a novel zirconia bonding system and its adhesion mechanism. Dent Mater 2017; 33:1371-1380. [PMID: 29050817 DOI: 10.1016/j.dental.2017.09.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 08/08/2017] [Accepted: 09/07/2017] [Indexed: 12/19/2022]
Affiliation(s)
- Takahiro Murakami
- Nihon University Graduate School of Dentistry at Matsudo, Crown Bridge Prosthodontics, Chiba 271-8587, Japan; Department of Crown Bridge Prosthodontics, Nihon University School of Dentistry at Matsudo, Chiba 271-8587, Japan
| | - Shinji Takemoto
- Department of Biomedical Engineering, Iwate Medical University, Iwate 028-3694, Japan
| | - Norihiro Nishiyama
- Department of Dental Biomaterials, Nihon University School of Dentistry at Matsudo, Chiba 271-8587, Japan
| | - Masahiro Aida
- Department of Crown Bridge Prosthodontics, Nihon University School of Dentistry at Matsudo, Chiba 271-8587, Japan.
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Ziąbka M, Dziadek M, Menaszek E, Banasiuk R, Królicka A. Middle Ear Prosthesis with Bactericidal Efficacy-In Vitro Investigation. Molecules 2017; 22:molecules22101681. [PMID: 28994723 PMCID: PMC6151403 DOI: 10.3390/molecules22101681] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 10/05/2017] [Accepted: 10/06/2017] [Indexed: 01/06/2023] Open
Abstract
Materials used in ossicular replacement prostheses must possess appropriate biological properties, such as biocompatibility, stability, no cytotoxicity. Due to the risk of infection (otitis media and chronic otitis media), it is desirable to use an antibacterial agent for illness prevention during the ossicular reconstruction. The goal of this work was to observe biological properties of a new composite prosthesis made of ABS containing silver nanoparticles (AgNPs 45T). Samples for biological tests and then a prototype of middle ear prosthesis were prepared using injection moulding and extrusion techniques. In vitro experiments were carried out to assess bactericidal efficacy against Staphylococcus aureus and Pseudomona aeruginosa standard strains, cell proliferation, viability and cytotoxicity, using Hs680.Tr. fibroblast cells. Surface parameters of the samples were evaluated, including roughness and wettability. The silver ions were continually released from the polymer in aqueous solution. The silver ions release was measured as increasing with time and concentration of the silver nanoparticles in the polymer matrix. No cytotoxicity effect was observed, while bactericidal efficacy was noticed for silver nanoparticles. The roughness studies showed an increase in roughness for the samples with silver nanoparticles. All polymer and composite materials containing silver nanoparticles showed hydrophilic properties. The composites were found to release silver ions at a concentration level capable of rendering the antimicrobial efficacy even with the lowest concentration of silver nanoparticles in the material. Our results demonstrate that middle ear prosthesis made of polymer and silver nanoparticles may eliminate bacteria during inflammation in the middle ear.
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Affiliation(s)
- Magdalena Ziąbka
- AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Department of Ceramics and Refractories, Krakow 30-059, Poland.
| | - Michał Dziadek
- AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Department of Glass Technology and Amorphous Coatings, Krakow 30-059, Poland.
| | - Elżbieta Menaszek
- UJ-Jagiellonian University, Medical College, Faculty of Pharmacy, Department of Cytobiology, Krakow 30-001, Poland.
| | - Rafał Banasiuk
- University of Gdansk, Intercollegiate Faculty of Biotechnology UG-GUMed, Department of Biotechnology, Laboratory of Biologically Active Compounds, Gdansk 80-307, Poland.
| | - Aleksandra Królicka
- University of Gdansk, Intercollegiate Faculty of Biotechnology UG-GUMed, Department of Biotechnology, Laboratory of Biologically Active Compounds, Gdansk 80-307, Poland.
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Sivaraman K, Chopra A, Narayan AI, Balakrishnan D. Is zirconia a viable alternative to titanium for oral implant? A critical review. J Prosthodont Res 2017; 62:121-133. [PMID: 28827030 DOI: 10.1016/j.jpor.2017.07.003] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 06/22/2017] [Accepted: 07/11/2017] [Indexed: 02/04/2023]
Abstract
PURPOSE Titanium based implant systems, though considered as the gold standard for rehabilitation of edentulous spaces, have been criticized for many inherent flaws. The onset of hypersensitivity reactions, biocompatibility issues, and an unaesthetic gray hue have raised demands for more aesthetic and tissue compatible material for implant fabrication. Zirconia is emerging as a promising alternative to conventional Titanium based implant systems for oral rehabilitation with superior biological, aesthetics, mechanical and optical properties. This review aims to critically analyze and review the credibility of Zirconia implants as an alternative to Titanium for prosthetic rehabilitation. STUDY SELECTION The literature search for articles written in the English language in PubMed and Cochrane Library database from 1990 till December 2016. The following search terms were utilized for data search: "zirconia implants" NOT "abutment", "zirconia implants" AND "titanium implants" AND "osseointegration", "zirconia implants" AND compatibility. RESULTS The number of potential relevant articles selected were 47. All the human in vivo clinical, in vitro, animals' studies were included and discussed under the following subheadings: Chemical composition, structure and phases; Physical and mechanical properties; Aesthetic and optical properties; Osseointegration and biocompatibility; Surface modifications; Peri-implant tissue compatibility, inflammation and soft tissue healing, and long-term prognosis. CONCLUSIONS Zirconia implants are a promising alternative to titanium with a superior soft-tissue response, biocompatibility, and aesthetics with comparable osseointegration. However, further long-term longitudinal and comparative clinical trials are required to validate zirconia as a viable alternative to the titanium implant.
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Affiliation(s)
- Karthik Sivaraman
- Department of Prosthodontics, Manipal College of Dental Sciences, Manipal University, Manipal, 576104, India.
| | - Aditi Chopra
- Department of Periodontology, Manipal College of Dental Sciences, Manipal University, Manipal, India
| | - Aparna I Narayan
- Department of Prosthodontics, Manipal College of Dental Sciences, Manipal University, Manipal, 576104, India
| | - Dhanasekar Balakrishnan
- Department of Prosthodontics, Manipal College of Dental Sciences, Manipal University, Manipal, 576104, India
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Liu X, Gan K, Liu H, Song X, Chen T, Liu C. Antibacterial properties of nano-silver coated PEEK prepared through magnetron sputtering. Dent Mater 2017; 33:e348-e360. [PMID: 28734568 DOI: 10.1016/j.dental.2017.06.014] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 03/21/2017] [Accepted: 06/22/2017] [Indexed: 11/30/2022]
Abstract
OBJECTVE We aimed to investigate the cytotoxicity and antibacterial properties of nano-silver-coated polyetheretherketone (PEEK) produced through magnetron sputtering and provide a theoretical basis for its use in clinical applications. METHODS The surfaces of PEEKs were coated with nano-silver at varying thicknesses (3, 6, 9, and 12nm) through magnetron sputtering technology. The resulting coated PEEK samples were classified into the following groups according to the thickness of the nano-silver coating: PEEK-3 (3nm), PEEK-6 (6nm), PEEK-9 (9nm), PEEK-12 (12nm), and PEEK control group. The surface microstructure and composition of each sample were observed by scanning electron microscopy (SEM), atomic force microscopy (AFM), and energy dispersive spectrum (EDS) analysis. The water contact angle of each sample was then measured by contact angle meters. A cell counting kit (CCK-8) was used to analyze the cytotoxicity of the mouse fibroblast cells (L929) in the coated groups (n=5) and group test samples (n=6), negative control (polyethylene, PE) (n=6), and positive control group (phenol) (n=6). The antibacterial properties of the samples were tested by co-culturing Streptococcus mutans and Straphylococcus aureus. The bacteria that adhered to the surface of samples were observed by SEM. The antibacterial adhesion ability of each sample was then evaluated. RESULTS SEM and AFM analysis results showed that the surfaces of control group samples were smooth but compact. Homogeneous silver nano-particles (AgNPs) and nano-silver coating were uniformly distributed on the surface of the coated group samples. Compared with the control samples, the nano-silver coated samples had a significant increase in surface roughness (P<0.05) as the thickness of their nano-silver coating increased. EDS analysis showed that not only C and O but also Ag were present on the surface of the coated samples. Moreover, the water contact angle of modified samples significantly increased after nano-silver coating modification (P<0.01). CCK-8 cytotoxicity test results showed that coated samples did not exhibit cytotoxicity. The antibacterial experimental results showed that the nano-silver coating can significantly improve the antibacterial activity and bacterial adhesion ability of the PEEK samples. SIGNIFICANCE The compact and homogeneous nano-silver coating was successfully prepared on the surface of PEEK through magnetron sputtering. The nano-silver coated PEEKs demonstrated enhanced antibacterial activities and bacterial adhesion abilities and had no cytotoxic effects.
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Affiliation(s)
- Xiuju Liu
- Department of General Dentistry, School and Hospital of Stomatology, Jilin University,1500 Qing Hua Road, Changchun 130021, PR China
| | - Kang Gan
- Dental Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, PR China
| | - Hong Liu
- Department of General Dentistry, School and Hospital of Stomatology, Jilin University,1500 Qing Hua Road, Changchun 130021, PR China.
| | - Xiaoqing Song
- Department of General Dentistry, School and Hospital of Stomatology, Jilin University,1500 Qing Hua Road, Changchun 130021, PR China
| | - Tianjie Chen
- Department of General Dentistry, School and Hospital of Stomatology, Jilin University,1500 Qing Hua Road, Changchun 130021, PR China
| | - Chenchen Liu
- Department of General Dentistry, School and Hospital of Stomatology, Jilin University,1500 Qing Hua Road, Changchun 130021, PR China
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Aboushelib MN, Shawky R. Osteogenesis ability of CAD/CAM porous zirconia scaffolds enriched with nano-hydroxyapatite particles. Int J Implant Dent 2017; 3:21. [PMID: 28527036 PMCID: PMC5438327 DOI: 10.1186/s40729-017-0082-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 05/08/2017] [Indexed: 11/19/2022] Open
Abstract
Background The aim of this study was to evaluate osteogenesis ability of CAD/CAM porous zirconia scaffolds enriched with hydroxy apatite used to augment large boney defects in a dog model. Methods Surgical defects were made bilaterally on the lower jaw of 12 Beagle dogs. Cone beam CT images were used to create three dimensional images of the healed defects. Porous zirconia scaffolds were fabricated by milling custom made CAD/CAM blocks into the desired shape. After sintering, the pores of half of the scaffolds were filled with a nano-hydroxy apatite (HA) powder while the other half served as control. The scaffolds were inserted bilaterally in the healed mandibular jaw defects and were secured in position by resorbable fixation screws. After a healing time of 6 weeks, bone-scaffold interface was subjected to histomorphometric analysis to detect the amount of new bone formation. Stained histological sections were analyzed using a computer software (n=12, α=0.05). Mercury porosimetery was used to measure pore sizes, chemical composition was analyzed using energy dispersive x-ray analysis (EDX), and the crystal structure was identified using x-ray diffraction micro-analysis (XRD). Results HA enriched zirconia scaffolds revealed significantly higher volume of new bone formation (33% ± 14) compared to the controls (21% ± 11). New bone deposition started by coating the pore cavity walls and proceeded by filling the entire pore volume. Bone in-growth started from the surface of the scaffold and propagated towards the scaffold core. Islands of entrapped hydroxy apatite particles were observed in mineralized bone matrix. Conclusions Within the limitations of this study, hydroxy apatite enhanced osteogenesis ability of porous zirconia scaffolds.
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Affiliation(s)
- Moustafa N Aboushelib
- Dental Biomaterials Department, Faculty of Dentistry, Alexandria University, Champollion st, Azarita, Alexandria, Egypt.
| | - Rehab Shawky
- Oral Surgery Department, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
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Ke J, He F, Ye J. Enhancing the Bioactivity of Yttria-Stabilized Tetragonal Zirconia Ceramics via Grain-Boundary Activation. ACS APPLIED MATERIALS & INTERFACES 2017; 9:16015-16025. [PMID: 28421736 DOI: 10.1021/acsami.7b03405] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Yttria-stabilized tetragonal zirconia (Y-TZP) has been proposed as a potential dental implant because of its good biocompatibility, excellent mechanical properties, and distinctive aesthetic effect. However, Y-TZP cannot form chemical bonds with bone tissue because of its biological inertness, which affects the reliability and long-term efficacy of Y-TZP implants. In this study, to improve the bioactivity of Y-TZP ceramics while maintaining their good mechanical performance, Y-TZP was modified by grain-boundary activation via the infiltration of a bioactive glass (BG) sol into the surface layers of Y-TZP ceramics under different negative pressures (atmospheric pressure, -0.05 kPa, and -0.1 kPa), followed by gelling and sintering. The in vitro bioactivity, mechanical properties, and cell behavior of the Y-TZP with improved bioactivity were systematically investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), electron probe microanalysis (EPMA), and Raman spectroscopy. The results of the bioactivity test conducted by immersing Y-TZP in simulated body fluid (SBF) showed that a bonelike apatite layer was produced on the entire surface. The mechanical properties of the modified Y-TZP decreased as the negative pressure in the BG-infiltration process increased relative to those of the Y-TZP blank group. However, the samples infiltrated with the BG sol under -0.05 kPa and atmospheric pressure still retained good mechanical performance. The cell-culture results revealed that the bioactive surface modification of Y-TZP could promote cell adhesion and differentiation. The present work demonstrates that the bioactivity of Y-TZP can be enhanced by grain-boundary activation, and the bioactive Y-TZP is expected to be a potential candidate for use as a dental implant material.
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Affiliation(s)
- Jinhuan Ke
- School of Materials Science and Engineering, South China University of Technology , Guangzhou 510641, China
- National Engineering Research Center for Tissue Restoration and Reconstruction , Guangzhou 510006, China
| | - Fupo He
- School of Electromechanical Engineering, Guangdong University of Technology , Guangzhou 510006, China
| | - Jiandong Ye
- School of Materials Science and Engineering, South China University of Technology , Guangzhou 510641, China
- National Engineering Research Center for Tissue Restoration and Reconstruction , Guangzhou 510006, China
- Key Laboratory of Biomedical Materials of Ministry of Education, South China University of Technology , Guangzhou 510641, China
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Mao W, Yoo HS. Pluronic-Induced Surface Etching of Biodegradable Nanofibers for Enhanced Adsorption of Serum Protein. Macromol Biosci 2017; 17. [DOI: 10.1002/mabi.201700057] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Revised: 03/23/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Wei Mao
- Department of Biomedical Materials Engineering; College of Biomedical Science; Kangwon National University; Chuncheon 24341 Republic of Korea
| | - Hyuk Sang Yoo
- Department of Biomedical Materials Engineering; College of Biomedical Science; Kangwon National University; Chuncheon 24341 Republic of Korea
- Institute of Bioscience and Biotechnology; Kangwon National University; Chuncheon 24341 Republic of Korea
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Sethu SN, Namashivayam S, Devendran S, Nagarajan S, Tsai WB, Narashiman S, Ramachandran M, Ambigapathi M. Nanoceramics on osteoblast proliferation and differentiation in bone tissue engineering. Int J Biol Macromol 2017; 98:67-74. [DOI: 10.1016/j.ijbiomac.2017.01.089] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 01/11/2017] [Accepted: 01/18/2017] [Indexed: 01/24/2023]
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Vu VT, Oh GJ, Yun KD, Lim HP, Kim JW, Nguyen TPT, Park SW. Acid etching of glass-infiltrated zirconia and its biological response. J Adv Prosthodont 2017; 9:104-109. [PMID: 28435619 PMCID: PMC5397586 DOI: 10.4047/jap.2017.9.2.104] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 12/05/2016] [Accepted: 12/20/2016] [Indexed: 11/18/2022] Open
Abstract
PURPOSE The purpose of this study was to evaluate the influence of acid etching treatment on surface characteristics and biological response of glass-infiltrated zirconia. MATERIALS AND METHODS A hundred zirconia specimens were divided into four groups depending on surface treatments: untreated zirconia (group Z); acid-etched zirconia (group ZE); glass-infiltrated zirconia (group ZG); and glass-infiltrated and acid-etched zirconia (group ZGE). Surface roughness, surface topography, surface morphology, and Vickers hardness of specimens were evaluated. For biological response test, MC3T3-E1 cell attachment and proliferation on surface of the specimens were examined. The data were statistically analyzed using one-way ANOVA and Tukey's HSD test at a significance level of 0.05. RESULTS Group ZGE showed the highest surface roughness (Ra = 1.54 µm) compared with other groups (P < .05). Meanwhile, the hardness of group Z was significantly higher than those of other groups (P < .05). Cell attachment and cell proliferation were significantly higher in group ZGE (P < .05). CONCLUSION We concluded that effective surface roughness on zirconia could be made by acid etching treatment after glass infiltration. This surface showed significantly enhanced osteoblast cell response.
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Affiliation(s)
- Van Thi Vu
- Department of Prosthodontics, Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Gye-Jeong Oh
- RIS Foundation for Advanced Biomaterial, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Kwi-Dug Yun
- Department of Prosthodontics, Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Hyun-Pil Lim
- Department of Prosthodontics, Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Ji-Won Kim
- Department of Prosthodontics, Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Thao Phuong Thi Nguyen
- Department of Prosthodontics, Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Sang-Won Park
- Department of Prosthodontics, Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
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Cionca N, Hashim D, Mombelli A. Zirconia dental implants: where are we now, and where are we heading? Periodontol 2000 2016; 73:241-258. [DOI: 10.1111/prd.12180] [Citation(s) in RCA: 141] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Han JM, Hong G, Lin H, Shimizu Y, Wu Y, Zheng G, Zhang H, Sasaki K. Biomechanical and histological evaluation of the osseointegration capacity of two types of zirconia implant. Int J Nanomedicine 2016; 11:6507-6516. [PMID: 27994456 PMCID: PMC5153287 DOI: 10.2147/ijn.s119519] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
The purpose of this study was to evaluate the biomechanical and histological behavior of a ceria-stabilized zirconia-alumina nanocomposite (NanoZr) in comparison with that of 3 mol% yttria-stabilized tetragonal zirconia polycrystalline (3Y-TZP) in Sprague Dawley rats. Cylindrical NanoZr and 3Y-TZP implants (diameter 1 mm, length 2 mm) were used. Implant-surface morphology and surface roughness were determined by scanning white-light interferometry and scanning electron microscopy, respectively. The cylindrical zirconia implants were placed at the distal edge of the femur of Sprague Dawley rats. At weeks 2, 4, and 8, the interfacial shear strength between implant and bone was measured by push-in test. Histological analysis was performed using hard-tissue sections. Bone-implant contact (BIC), the thickness of new bone around the implant within the bone marrow area, and osteoclast numbers were evaluated. The average surface roughness of 3Y-TZP (Sa 0.788 μm) was significantly higher than that of NanoZr (Sa 0.559 μm). The shear strengths of 3Y-TZP and NanoZr were similar at 2 weeks, but at 4 and 8 weeks the shear strength of NanoZr was higher than that of 3Y-TZP. The average BIC values within the bone marrow area for 3Y-TZP and NanoZr were 25.26% and 31.51% at 2 weeks, 46.78% and 38% at 4 weeks, and 47.88% and 56.81% at 8 weeks, respectively. The average BIC values within the cortical area were 38.86% and 58.42% at 2 weeks, 66.82% and 57.74% at 4 weeks, and 79.91% and 78.97% at 8 weeks, respectively. The mean BIC value did not differ significantly between the two zirconia materials at any time point. The NanoZr implants were biocompatible, capable of establishing close BIC, and may be preferred for metal-free dental implants.
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Affiliation(s)
- Jian-min Han
- Department of Dental Materials, National Engineering Laboratory for Digital and Material Technology of Stomatology, Peking University School and Hospital of Stomatology, Beijing, People’s Republic of China
- Division of Advanced Prosthetic Dentistry
| | | | - Hong Lin
- Department of Dental Materials, National Engineering Laboratory for Digital and Material Technology of Stomatology, Peking University School and Hospital of Stomatology, Beijing, People’s Republic of China
| | - Yoshinaka Shimizu
- Department of Oral Pathology, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Yuhan Wu
- Division of Advanced Prosthetic Dentistry
| | - Gang Zheng
- Department of Dental Materials, National Engineering Laboratory for Digital and Material Technology of Stomatology, Peking University School and Hospital of Stomatology, Beijing, People’s Republic of China
| | - Hongyu Zhang
- State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing, People’s Republic of China
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Liu J, Hong G, Wu YH, Endo K, Han JM, Kumamoto H, Wada T, Kato H, Gao P, Sasaki K. A novel method of surface modification by electrochemical deoxidation: Effect on surface characteristics and initial bioactivity of zirconia. J Biomed Mater Res B Appl Biomater 2016; 105:2641-2652. [PMID: 27783470 DOI: 10.1002/jbm.b.33805] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Revised: 10/06/2016] [Accepted: 10/12/2016] [Indexed: 11/06/2022]
Abstract
The aim of this study was to investigate and compare the surface characteristics and initial bioactivity of ceria-stabilized zirconia/alumina nanocomposite (NANOZR) with those of yttria-stabilized zirconia (3Y-TZP) and pure titanium (CpTi) following the use of three surface modification methods; polishing, sandblasting/acid-etching (SB-E) and electrochemical deoxidation (ECD). Physical properties including surface morphology, chemical composition, X-ray diffraction, surface wettability, surface roughness, and hardness were measured. Osteoblast-like MC3T3-E1 cells were used to examine cell morphology and attachment to the surfaces of the materials. ECD treated NANOZR (NANOZR-E) showed a well-arranged, self-organized microporous surface structure with significantly low contact angles when compared with the other specimens (p < 0.05). NANOZR-E also demonstrated a slight decrease in monoclinic phase content (-4.4 wt %). The morphology and attachment of MC3T3-E1 cells on NANOZR-E were similar to those on polished and SBE-treated CpTi surfaces. Higher cell affinity was observed on NANOZR-E when compared with ECD treated 3Y-TZP. The findings of this study indicate the effectiveness of the novel technique, ECD, in the formation of a microporous surface on NANOZR when compared with both CpTi and 3Y-TZP. Moreover, this method also appears to improve the biological activity of NANOZR during the initial stage. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 2641-2652, 2017.
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Affiliation(s)
- Juan Liu
- Department of Prosthodontics, Tianjin Medical University School of Stomatology, Tianjin, China.,Division of Advanced Prosthetic Dentistry, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Guang Hong
- Liaison Center for Innovative Dentistry, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Yu-Han Wu
- Division of Advanced Prosthetic Dentistry, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Kosei Endo
- Division of Aging and Geriatric Dentistry, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Jian-Min Han
- Dental Materials Laboratory, National Engineering Laboratory for Digital and Material Technology of Stomatology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Hiroyuki Kumamoto
- Department of Oral Pathology, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Takeshi Wada
- Non-Equilibrium Materials Division, Institute for Materials Research, Tohoku University, Sendai, Japan
| | - Hidemi Kato
- Non-Equilibrium Materials Division, Institute for Materials Research, Tohoku University, Sendai, Japan
| | - Ping Gao
- Department of Prosthodontics, Tianjin Medical University School of Stomatology, Tianjin, China
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Graduate School of Dentistry, Tohoku University, Sendai, Japan
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