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Silva-Barbieri D, Escalona N, Salazar FN, López F, Pérez-Correa JR. Novel protein stabilization in white wine: A study on thermally treated zirconia-alumina composites. Food Res Int 2024; 186:114337. [PMID: 38729718 DOI: 10.1016/j.foodres.2024.114337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 03/29/2024] [Accepted: 04/16/2024] [Indexed: 05/12/2024]
Abstract
A major concern for wineries is haze formation in white wines due to protein instability. Despite its prevalent use, the conventional bentonite method has shortcomings, including potential alteration of color and aroma, slow processing times, and notable wine wastage. Zirconium oxide (ZrO2) effectively removes proteins without affecting wine characteristics. However, producing cost-effective ZrO2 materials with efficient protein removal capabilities poses a significant challenge. This research aims to assess the viability of designing a porous material impregnated with zirconia to remove turbidity-causing proteins effectively. For this purpose, the support material alone (Al2O3) and the zirconia-impregnated support (ZrO2/Al2O3) were subjected to different calcination temperatures. It was observed that high-temperature treatments (750 °C) enhanced wine stability and protein adsorption capacity. The optimal adsorbent achieved a notable reduction in turbidity, decreasing the ΔNTU from 42 to 18, alongside a significant 44 % reduction in the total protein content, particularly affecting proteins in the molecular weight range of 10 to 70 kDa. This result is attributed to modifying the textural properties of ZrO2/Al2O3, characterized by the reduction of acidic sites, augmented pore diameters from 4.81 to 7.74 nm, and the emergence of zirconia clusters across the surface of the porous support. In summary, this study presents the first application of zirconia on the alumina support surface for protein stabilization in white wine. Combining ZrO2/Al2O3 and a high-temperature treatment emerges as a promising, cost-efficient, and environmentally sustainable strategy for protein removal in white wine.
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Affiliation(s)
- Daniela Silva-Barbieri
- Chemical and Bioprocess Engineering Department, School of Engineering, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, P.O. Box 306, Santiago 7820436, Chile
| | - Néstor Escalona
- Chemical and Bioprocess Engineering Department, School of Engineering, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, P.O. Box 306, Santiago 7820436, Chile.
| | - Fernando N Salazar
- Escuela de Alimentos, Facultad de Ciencias Agronómicas y de los Alimentos, Pontificia Universidad Católica de Valparaíso, Waddington 716, Valparaíso, Chile
| | - Francisco López
- Departament d'Enginyeria Química, Facultat d'Enologia, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007, Tarragona, Spain
| | - José R Pérez-Correa
- Chemical and Bioprocess Engineering Department, School of Engineering, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, P.O. Box 306, Santiago 7820436, Chile.
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Sivasankar MV, Chinta ML, Sreenivasa Rao P. Zirconia based composite scaffolds and their application in bone tissue engineering. Int J Biol Macromol 2024; 265:130558. [PMID: 38447850 DOI: 10.1016/j.ijbiomac.2024.130558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 02/28/2024] [Accepted: 02/28/2024] [Indexed: 03/08/2024]
Abstract
In the field of bone tissue engineering, biomimetic scaffold utilization is deemed an immensely promising method. The bio-ceramic material Zirconia (ZrO2) has garnered significant attention in the biomimetic scaffolds realm due to its remarkable biocompatibility, superior mechanical strength, and exceptional chemical stability. Numerous examinations have been conducted to investigate the properties and functions of biomimetic structures built from zirconia. Generally, nano-ZrO2 materials have showcased encouraging applications in bone tissue engineering, providing a blend of mechanical robustness, bioactivity, drug delivery capabilities, and antibacterial properties. This review aims to concentrate on the properties and preparations of ZrO2 and its composite materials, while emphasizing its role along with other materials as scaffolds for bone tissue repair applications. The study also discusses the constraints of materials and technology involved in this domain. Ongoing research and development in this area are anticipated to further augment the potential of nano-ZrO2 for advancing bone regeneration therapies.
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Affiliation(s)
- M V Sivasankar
- Stem Cell Research Laboratory, Department of Biotechnology, National Institute of Technology, Warangal, Telangana 506004, India
| | - Madhavi Latha Chinta
- Stem Cell Research Laboratory, Department of Biotechnology, National Institute of Technology, Warangal, Telangana 506004, India
| | - P Sreenivasa Rao
- Stem Cell Research Laboratory, Department of Biotechnology, National Institute of Technology, Warangal, Telangana 506004, India..
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Şahin N, Ural Ç. Comparison of different digital shade selection methodologies in terms of accuracy. J Adv Prosthodont 2024; 16:38-47. [PMID: 38455674 PMCID: PMC10917631 DOI: 10.4047/jap.2024.16.1.38] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 01/30/2024] [Accepted: 02/08/2024] [Indexed: 03/09/2024] Open
Abstract
PURPOSE This study aims to evaluate the accuracy of different shade selection techniques and determine the matching success of crown restorations fabricated using digital shade selection techniques. MATERIALS AND METHODS Teeth numbers 11 and 21 were prepared on a typodont model. For the #11 tooth, six different crowns were fabricated with randomly selected colors and set as the target crowns. The following four test groups were established: Group C, where the visual shade selection was performed using the Vita 3D Master Shade Guide and the group served as the control; Group Ph, where the shade selection was performed under the guidance of dental photography; Group S, where the shade selection was performed by measuring the target tooth color using a spectrophotometer; and Group I, where the shade selection was performed by scanning the test specimens and target crowns using an intraoral scanner. Based on the test groups, 24 crowns were fabricated using different shade selection techniques. The ΔE values were calculated according to the CIEDE2000 (2:1:1) formula. The collected data were analyzed by means of a one-way analysis of variance. RESULTS For the four test groups (Groups C, Ph, S, and I), the following mean ΔE values were obtained: 2.74, 3.62, 2.13, and 3.5, respectively. No significant differences were found among the test groups. CONCLUSION Although there was no statistically significant difference among the shade selection techniques, Group S had relatively lower ΔE values. Moreover, according to the test results, the spectrophotometer shade selection technique may provide more successful clinical results.
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Affiliation(s)
- Nurşen Şahin
- Department of Prosthodontics, Faculty of Dentistry, Giresun University, Giresun, Turkey
| | - Çağrı Ural
- Department of Prosthodontics, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey
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Issa AA, Ibraheem HH, El-Sayed DS. Computational innovation of in situ metallic elements with zirconia as a novel possible carrier for chemotherapeutic medication. J Mol Model 2023; 30:14. [PMID: 38148383 DOI: 10.1007/s00894-023-05815-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 12/19/2023] [Indexed: 12/28/2023]
Abstract
CONTEXT Electronic sustainable behavior on the material surface and in situ metal configuration were accompted with some metal atoms like Li, Na, and K elements. Metal-doped ZrO2 crystal exported modified characteristics related to electronic conduction and exhibited some dynamic modification around the surface of the metal oxide. Computational perturbations were considered to discuss the modification behavior in addition to the studied Li, Na, and K metals. Optimization of the three doping systems was achieved followed by generating DOS and electronic band structure maps. A dynamic simulation was performed with temperature over 2000 k: the presence of the metal on the surface and prediction of its ZrO2 inclusion leading to access adsorption behavior, besides generating predictive designed models described the adsorption affinity on the solid-state surface. It cannot be neglected the importance of various metals as a main role in chemotherapy. Molecular docking investigation was considered to predict the binding behavior of the studied metal ZrO2 carrier system as an anticancer agent. Also, docking affinity was helpful in comparing the active sites binding for the studied metals, resulting in a notable binding affinity for both Li- and Na-zirconia incorporation. METHODS The program PWSCF, which is a component of the quantum ESPRESSO suite for quantum simulation of materials, was used to construct geometric systems. The generalized gradient approximation in the Perdew-Burke-Ernzerhof (GGA/PBE) function with D3 correction (Becke-Jonson damping) was applied to the exchange-correlation energy. As the last step in the DFT postulation and design, adsorption locator annealing was carried out on the convergent models using the Materials Studio simulation package. The main roles played by metal atoms are in protein binding and the suppression of bio-active regions. For the docking process, the protein was produced using AutoDock 4.2 and Discovery Studio software in accordance with the usual methodology. Chimera and Discovery Studio were used to examine the docking data that was processed after generating specific grid box dimensions for 7BTN.
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Affiliation(s)
- Ali Abdullah Issa
- Department of Applied Sciences, University of Technology, Baghdad, Iraq
| | - Hiba H Ibraheem
- Department of Applied Sciences, University of Technology, Baghdad, Iraq
| | - Doaa S El-Sayed
- Chemistry Department, Faculty of Science, Alexandria University, Baghdad Street, Moharam Bey, P.O. Box 21511, Alexandria, Egypt.
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Mohseni P, Soufi A, Chrcanovic BR. Clinical outcomes of zirconia implants: a systematic review and meta-analysis. Clin Oral Investig 2023; 28:15. [PMID: 38135804 PMCID: PMC10746607 DOI: 10.1007/s00784-023-05401-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 12/04/2023] [Indexed: 12/24/2023]
Abstract
PURPOSE To assess the clinical outcomes of zirconia dental implants based on an updated systematic literature review. METHODS An electronic search was performed in three databases, last updated in June 2023, supplemented by hand searching. The eligibility criteria were clinical studies reporting patients rehabilitated with zirconia implants. The cumulative survival rate (CSR) of implants was calculated. A meta-analysis for marginal bone loss (MBL) under different follow-up times and a meta-regression assessing the relationship between mean MBL and follow-up were done. RESULTS Twenty-five studies were included (4017 implants, 2083 patients). Seven studies had follow-up longer than 60 months. 172 implants failed, after a mean of 12.0 ± 16.1 months (min-max 0.3-86.0), of which 47 early failures, and 26 due to implant fracture, the majority in narrow-diameter implants. The 10-year CSR was 95.1%. Implants with coronal part prepared by drills presented statistically significant lower survival than non-prepared implants (p < 0.001). Two-piece implants presented lower survival than one-piece implants (p = 0.017). Implants discontinued from the market presented lower survival than the commercially available ones (p < 0.001). The difference in survival was not significant between implants in maxilla and mandible (p = 0.637). The mean MBL fluctuated between 0.632 and 2.060 mm over long periods of observation (up until 132 months). There was an estimated MBL increase of 0.005 mm per additional month of follow-up. CONCLUSION Zirconia implants present high 10-year CSR and short-term low MBL. The review was registered in PROSPERO (CRD42022342055). CLINICAL RELEVANCE The clinical outcomes observed for zirconia dental implants are very promising, although these have not yet been extensively studied as titanium alloy implants.
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Affiliation(s)
| | - Ahmad Soufi
- Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Bruno Ramos Chrcanovic
- Department of Oral and Maxillofacial Surgery and Oral Medicine, Faculty of Odontology, Malmö University, Carl Gustafs Väg 34, 214 21, Malmö, Sweden.
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Thammajaruk P, Buranadham S, Guazzato M, Wang Y. Effect of glass-ceramic coating versus alumina air-abrasion on the bond strength and residual stress of zirconia. Clin Oral Investig 2023; 27:7833-7840. [PMID: 37989965 DOI: 10.1007/s00784-023-05374-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 11/05/2023] [Indexed: 11/23/2023]
Abstract
OBJECTIVES To assess the effect of glass-ceramic coated zirconia versus alumina air-abraded zirconia on the shear bond strength (SBS) of resin cement and investigate the residual stresses present on both mechanically pre-treated surfaces. MATERIALS AND METHODS A total of 180 zirconia disks, with diameters of 10 mm and 5 mm, were divided into two groups: DCMhotbond glass-ceramic coated, followed by hydrofluoric acid etching (DCM), and alumina air-abraded (AB). All mechanically pre-treated disks were conditioned with G-Multi Primer and bonded using G-Cem Linkforce Cement. Ninety specimens were immersed in distilled water for 24 h and subsequently allocated into three groups based on aging conditions (n = 15/subgroups): immediate testing, 5000 thermal cycles, and 10,000 thermal cycles. Then, the shear bond strength was assessed, and the obtained data were subjected to analysis using a two-way ANOVA, followed by a one-way ANOVA and Tukey's HSD post hoc test (α = 0.05). The residual stresses present on both mechanically pre-treated surfaces were examined using X-ray diffraction analysis. RESULTS The mean SBS values of the DCM and AB groups showed no significant difference under each aging condition. The SBS of DCM groups was not affected by thermal cycles, whereas the SBS of AB groups exhibited a significant decrease following thermal cycles. Glass-ceramic coated surfaces exhibited higher compressive stresses than alumina air-abrasion. CONCLUSIONS The DCMhotbond glass-ceramic coated zirconia showed comparable bond strength to the alumina air-abrasion technique. CLINICAL RELEVANCE The DCMhotbond glass-ceramic coating technique is a promising alternative for zirconia surface pre-treatment. However, further investigations are needed before suggesting its clinical use.
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Affiliation(s)
- Putsadeeporn Thammajaruk
- Department of Prosthetic Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat-Yai, Songkhla, 90110, Thailand.
| | - Supanee Buranadham
- Department of Prosthetic Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat-Yai, Songkhla, 90110, Thailand
| | - Massimiliano Guazzato
- Discipline of Prosthodontics, School of Dentistry, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Yu Wang
- Mark Wainwright Analytical Centre, Chemical Sciences Building (F10), University Mall, The University of New South Wales, Sydney, NSW, 2052, Australia
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Soliman YM, Mabrouk M, Raboh ASA, Tohamy KM, Beherei HH. Influence of the addition of different metal oxides on physicochemical and biological properties of calcium fluorosilicate/PCL bone cement. J Mech Behav Biomed Mater 2023; 146:106075. [PMID: 37591054 DOI: 10.1016/j.jmbbm.2023.106075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 08/10/2023] [Accepted: 08/13/2023] [Indexed: 08/19/2023]
Abstract
Calcium silicate cements have been greatly developed in the last decades through different approaches. Among these approaches, the inclusion of antibacterial agents or addition of metal oxides. Herein, calcium silicate cement containing fluorine (CFS) was developed from sodium fluorosilicate precursor for the first time using chemical perception method. Afterwards, metal oxide Bi2O3 or MgO or ZrO2 was individually mixed with CFS powder and blended together using Polycaprolactone polymer (PCL). The cement mixtures were characterized using DSC, XRD, FTIR and SEM/EDX to determine the effect of metal oxide on the pure CFS. Furthermore, mechanical, antibacterial and cell viability properties were evaluated for the developed CFS mixture cements. Moreover, these CFS mixture cements were implanted in male Wistar rats to determine the effect of metal oxides on the rate of bone reformation. The findings of physicochemical and morphological characterization showed no remarkable effects on the pure CFS after mixing with each metal oxide. However, enhanced compressive strengths (up to 104.07N/cm2), antibacterial activity and cell viability (up to 96%) were achieved for the CFS cement mixtures. Finally, the in vivo studies confirmed the biocompatibility of the CFS cement mixtures and especially those mixed with Bi2O3 or ZrO2. Therefore, this study supports that CFS blends with Bi2O3 or ZrO2 can be novel promising cementing materials for bone restoration.
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Affiliation(s)
- Yasser M Soliman
- Biophysics Branch, Faculty of Science, Al-Azhar University, Nasr City, 11884, Cairo, Egypt
| | - Mostafa Mabrouk
- Refractories, Ceramics and Building Materials Department, National Research Centre, 33 El Bohouth St (former EL Tahrir St), Dokki, Giza, P.O.12622, Egypt.
| | - Ahmed S Abd Raboh
- Biophysics Branch, Faculty of Science, Al-Azhar University, Nasr City, 11884, Cairo, Egypt
| | - Khairy M Tohamy
- Biophysics Branch, Faculty of Science, Al-Azhar University, Nasr City, 11884, Cairo, Egypt
| | - Hanan H Beherei
- Refractories, Ceramics and Building Materials Department, National Research Centre, 33 El Bohouth St (former EL Tahrir St), Dokki, Giza, P.O.12622, Egypt
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Suchorab K, Gawęda M, Kurpaska L. Comparison of Raman imaging assessment methods in phase determination and stress analysis of zirconium oxide layer. Spectrochim Acta A Mol Biomol Spectrosc 2023; 295:122625. [PMID: 36966685 DOI: 10.1016/j.saa.2023.122625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 02/23/2023] [Accepted: 03/09/2023] [Indexed: 06/18/2023]
Abstract
This work describes Raman imaging and its data evaluation methods by using the software's original features: built-in fitting function and K-means cluster analysis (KMC) followed by fitting in an external environment. For the first time, these methods were compared in terms of their principles, limitations, versatility, and process duration. The performed analysis showed the indispensability of Raman imaging in terms of phase distribution, phase content calculation, and stress determination. Zirconium oxide formed on different zirconium alloys under various oxidation conditions was selected as an exemplary material for this analysis. The reason for the material choice is that it is an excellent example of the application of this type of Raman analysis since both phase distribution and stress analysis in zirconium oxide are of crucial importance for the development of zirconium alloys, especially for nuclear applications. The juxtaposition of the results showed advantages and limitations of both procedures allowing a definition of the criteria for selecting the evaluation method for different applications.
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Affiliation(s)
- K Suchorab
- NOMATEN CoE, NOMATEN MAB, National Centre for Nuclear Research, A. Soltana 7, 05-400 Otwock-Swierk, Poland.
| | - M Gawęda
- NOMATEN CoE, NOMATEN MAB, National Centre for Nuclear Research, A. Soltana 7, 05-400 Otwock-Swierk, Poland
| | - L Kurpaska
- NOMATEN CoE, NOMATEN MAB, National Centre for Nuclear Research, A. Soltana 7, 05-400 Otwock-Swierk, Poland
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Pyo SW, Park K, Daher R, Kwon HB, Han JS, Lee JH. Comparison of the clinical outcomes of resin-modified glass ionomer and self-adhesive resin cementations for full-coverage zirconia restorations. J Dent 2023:104558. [PMID: 37230241 DOI: 10.1016/j.jdent.2023.104558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 05/17/2023] [Accepted: 05/22/2023] [Indexed: 05/27/2023] Open
Abstract
OBJECTIVES Both resin-modified glass ionomer cement (RMGIC) and self-adhesive resin cement (SAC) may be suitable for cementation of full-coverage zirconia restorations. This retrospective study aimed to investigate the clinical outcomes of zirconia-based restorations cemented with RMGIC and compare them with those cemented with SAC. METHODS Cases of full-coverage zirconia-based restorations cemented with either RMGIC or SAC between March 2016 and February 2019 were evaluated in this study. The clinical outcomes of the restorations were analyzed according to the type of cement used. In addition, cumulative success and survival rates were evaluated according to the cement and abutment types. Non-inferiority, Kaplan-Meier, and Cox hazard tests were conducted (α=.05). RESULTS A total of 288 full-coverage zirconia-based restorations (natural teeth, 157; implant restorations, 131) were analyzed. Loss of retention occurred in only one case; a single-unit implant crown cemented with RMGIC, which decemented 4.25 years post-restoration. RMGIC was non-inferior to SAC in terms of loss of retention (<5%). For single-unit natural tooth restorations, the four-year success rates in the RMGIC and SAC groups were 100% and 95.65%, respectively (p=.122). For single-unit implant restorations, the four-year success rates in the RMGIC and SAC groups were 95.66% and 100%, respectively (p=.365). The hazard ratios of all the predictor variables, including cement type, were not significant (p>.05). CONCLUSIONS Cementation of full-coverage zirconia restorations of both natural teeth and implants using RMGIC and SAC yields satisfactory clinical outcomes. Furthermore, RMGIC is non-inferior to SAC in terms of cementation success. CLINICAL SIGNIFICANCE Cementation with RMGIC or SAC for full-coverage zirconia restorations has favorable clinical outcomes in both natural teeth and implants. Both RMGIC and SAC have advantages in the cementation of full-coverage zirconia restorations to abutments with favorable geometries.
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Affiliation(s)
- Se-Wook Pyo
- Clinical Assistant Professor, Department of Prosthodontics, Gangnam Severance Hospital, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Koungjin Park
- Graduate Student, Department of Prosthodontics, Seoul National University School of Dentistry, Seoul, Republic of Korea
| | - René Daher
- Senior Lecturer, Division of Cariology and Endodontology, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Ho-Beom Kwon
- Dean and Professor, Department of Prosthodontics and Dental Research Institute, Seoul National University School of Dentistry, Seoul, Republic of Korea
| | - Jung-Suk Han
- Professor, Department of Prosthodontics and Dental Research Institute, Seoul National University School of Dentistry, Seoul, Republic of Korea
| | - Jae-Hyun Lee
- Professor, Department of Prosthodontics and Dental Research Institute, Seoul National University School of Dentistry, Seoul, Republic of Korea.; Program Director and Assistant Professor, Department of Prosthodontics and Dental Research Institute, Seoul National University School of Dentistry, Seoul, Republic of Korea..
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Ramesh M, Sankar C, Umamatheswari S, Balamurugan J, Jayavel R, Gowran M. Hydrothermal synthesis of ZnZrO 2/chitosan (ZnZrO 2/CS) nanocomposite for highly sensitive detection of glucose and hydrogen peroxide. Int J Biol Macromol 2023; 226:618-627. [PMID: 36481338 DOI: 10.1016/j.ijbiomac.2022.11.318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 10/28/2022] [Accepted: 11/29/2022] [Indexed: 12/12/2022]
Abstract
In this work, pure ZnZrO2 and chitosan supported (ZnZrO2/CS) nanocomposite have been synthesized at low coast by hydrothermal method. FT-IR, Micro Raman, PXRD, HR-SEM-EDAX, HR-TEM, AFM, BET and XPS were used to analyze the structural and morphological properties of the fabricated nanocomposites. The fabricated ZnZrO2 and ZnZrO2/CS nanocomposites were measured for their electrocatalytic activity towards glucose and hydrogen peroxide determinations. The ZnZrO2/CS sensor exhibited wide detection range (5 μM to 5.85 mM), high sensitivity (6.78 μA mM-1 cm-2), LOD (2.31 μM), and long-term stability for glucose detection in alkaline solution. Also, as a multifunctional electrochemical sensor, ZnZrO2/CS sensor exhibits excellent sensing ability towards hydrogen peroxide, with a wide dynamic range (20 μM to 6.85 mM), a high sensitivity (2.22 μA mM-1 cm-2), and a LOD (2.08 μM) (S/N = 3). The electrochemical measurement shows that the ZnZrO2/CS sensor has excellent catalytic activity and a much LOD than ZnZrO2. The modified electrode showed excellent anti interference nature. Furthermore, this ZnZrO2/CS electrode was used to detection of glucose and H2O2 in human blood serum and HeLa cells respectively.
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Affiliation(s)
- M Ramesh
- Department of Chemistry, Government Arts College (Affiliated to Bharathidasan University), Tiruchirappalli - 620 022, Tamil Nadu, India
| | - C Sankar
- Department of Chemistry, SRM TRP Engineering College, Tiruchirappalli - 621 105, Tamil Nadu, India
| | - S Umamatheswari
- Department of Chemistry, Government Arts College (Affiliated to Bharathidasan University), Tiruchirappalli - 620 022, Tamil Nadu, India.
| | - J Balamurugan
- National Creative Research Initiative (CRI) Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - R Jayavel
- Centre for Nanoscience and Technology, Anna University, Chennai - 600025, Tamil Nadu, India
| | - M Gowran
- Department of Chemistry, Anna University, Chennai - 60002, Tamil Nadu, India
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Bocam K, Anunmana C, Eiampongpaiboon T. Grain size, crystalline phase and fracture toughness of the monolithic zirconia. J Adv Prosthodont 2022; 14:285-293. [PMID: 36452361 PMCID: PMC9672698 DOI: 10.4047/jap.2022.14.5.285] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 09/03/2022] [Accepted: 09/22/2022] [Indexed: 08/27/2023] Open
Abstract
PURPOSE This study evaluated the relationship among translucency, crystalline phase, grain size, and fracture toughness of zirconia. MATERIALS AND METHODS Four commercial zirconia - Prettau®Anterior® (PA), Prettau® (P), InCorisZI (ZI), and InCorisTZI (TZI)- were selected for this study. The bar specimens were prepared to determine fracture toughness by using chevron notched beam method with four-point bending test. The grain size was evaluated by a mean linear intercept method using a scanning electron microscope. X-ray diffraction and Rietveld refinement were performed to evaluate the amount of tetragonal and cubic phases of zirconia. Contrast ratio (CR) was measured to investigate the level of translucency. RESULTS PA had the lowest fracture toughness among other groups (P < .05). In addition, the mean fracture toughness of P was significantly less than that of ZI, but there was no difference compared with TZI. Regarding grain size measurement, PA had the largest average grain size among the groups. P obtained larger grain size than ZI and TZI (P < .05). However, there was no significant difference between ZI and TZI. Moreover, PA had the lowest CR value compared with the other groups (P < .05). This means PA was the most translucent material in this study. Rietveld refinement found that PA presented the greatest percentage of cubic phase, followed by TZI, ZI, and P, respectively. CONCLUSION The different approaches are used by manufacturers to fabricate various types of translucent zirconia with different levels of translucency and mechanical properties, which should be concerned for material selection for successful clinical outcome.
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Affiliation(s)
- Kodchakorn Bocam
- Residency Training Program, Department of Prosthodontics, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | - Chuchai Anunmana
- Department of Prosthodontics, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
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Liu H, Inokoshi M, Nozaki K, Shimizubata M, Nakai H, Cho Too TD, Minakuchi S. Influence of high-speed sintering protocols on translucency, mechanical properties, microstructure, crystallography, and low-temperature degradation of highly translucent zirconia. Dent Mater 2021:S0109-5641(21)00360-2. [PMID: 34961644 DOI: 10.1016/j.dental.2021.12.028] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 12/15/2021] [Accepted: 12/15/2021] [Indexed: 01/24/2023]
Abstract
OBJECTIVES Impacts of high-speed sintering on the optical and mechanical properties, microstructure, crystallography, and low-temperature degradation of commercial yttria-partially stabilized zirconia (Y-PSZ) were investigated. METHODS Five commercial Y-PSZ products (KATANA HT, KATANA STML, KATANA UTML, Zpex 4, and Zpex Smile) were investigated. Specimens were sintered following speed-sintering (~90 min) and conventional-sintering protocols (~7 h), and a group of KATANA STML was super-speed-sintered (18 min). Dimensions of the zirconia specimens after sintering were 14.5 mm (diameter) and 1.2 mm (thickness). Translucency was assessed using a colorimeter. Biaxial flexural strength was measured using a universal testing machine, followed by Weibull analysis. Scanning electron microscopy was used for microstructure assessments. X-ray diffraction was used to analyze the crystallography before and after hydrothermal aging. Low-temperature degradation (LTD) tests were performed at 134 °C under 2-3 bar water vapor in an autoclave. RESULTS The translucency and flexural strength were not affected significantly by the sintering programs (p > 0.05). The conventionally sintered KATANA STML and speed-sintered Zpex 4 presented the highest and lowest Weibull modulus, respectively. The conventionally-sintered Y-PSZ had a larger average grain size and smaller fraction of fine grains than those of the speed-sintered specimens. The fractographic analysis of the speed- and conventionally sintered Y-PSZ yielded comparable results. The speed-sintered Y-PSZ exhibited a lower c-ZrO2 content than that of conventionally-sintered Y-PSZ, except for KATANA HT and KATANA STML. LTD tests indicated that some of the speed and conventionally-sintered Y-PSZ exhibited similar monoclinic volume fractions. SIGNIFICANCE Speed-sintering programs are acceptable for Y-PSZ zirconia.
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Ahmad M, Zafar M. Conversion of waste seed oil of Citrus aurantium into methyl ester via green and recyclable nanoparticles of zirconium oxide in the context of circular bioeconomy approach. Waste Manag 2021; 136:310-320. [PMID: 34749274 DOI: 10.1016/j.wasman.2021.10.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 09/18/2021] [Accepted: 10/01/2021] [Indexed: 06/13/2023]
Abstract
In the current scenario of energy crises and depleting fossil fuels, there is need of sustainable and cheaper interventions with green technology to address these obstinate glitches. Biodiesel produced from waste, non-edible seed oils is a cleaner, green and alternate source of fuel for diesel engines which can possibly add to circular bioeconomy. In this study, Citrus aurantium a novel, nonedible and waste seed oil (38% w/w) producing feedstock was subjected to biodiesel synthesis using recyclable zirconium oxide nano particles synthesized with Alternanthera pungens aqueous leave extract. Maximum yield of 94% was obtained through optimized reaction parameters of methanol to oil molar ratio 6:1, reaction time 120 min, temperature 87.5 °C and catalyst loading of 0.5 wt% using Response Surface Methodology. Green nano particles of zirconium oxide were characterized via Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD) and Energy diffraction X-Ray (EDX) while; physiochemical characterization of synthesized biodiesel was carried through Fourier-transform infrared spectroscopy (FTIR), Gas Chromatography/Mass spectroscopy (GC/MS), and Nuclear magnetic resonance (NMR 1H and 13C). Fuel properties of methyl ester met international standards of ASTM D-6571, EN 14214 and China GB/T 20828-2007. It was concluded that biodiesel production from Citrus aurantium waste and non-edible seed oil can be efficiently employed for generation of renewable energy which would further provide assistance in transformation of linear economy to circular bioeconomy.
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Affiliation(s)
- Mushtaq Ahmad
- Department of Plant Sciences, Quaid- i- Azam University, Islamabad 45320, Pakistan
| | - Muhammad Zafar
- Department of Plant Sciences, Quaid- i- Azam University, Islamabad 45320, Pakistan
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14
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Leitão CIMB, Fernandes GVDO, Azevedo LPP, Araújo FM, Donato H, Correia ARM. Clinical performance of monolithic CAD/CAM tooth-supported zirconia restorations: systematic review and meta-analysis. J Prosthodont Res 2021; 66:374-384. [PMID: 34615842 DOI: 10.2186/jpr.jpr_d_21_00081] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE The purpose of this systematic review was to evaluate the survival rate, biological complications, technical complications, and clinical behavior of single crowns supported by teeth made up in monolithic zirconia with CAD/CAM technology. STUDY SELECTION An extensive electronic search was conducted through Medline/PubMed, Embase, and Cochrane Library databases. Additional manual search was performed on the references of included articles to identify relevant publications. Two reviewers independently performed the selection and electronic and manual search. RESULTS From nine articles included, there was a total of 594 participants and 1657 single-tooth restorations with a mean exposure time of 1.07 years, and follow-up period between 0.3 and 2.1 years. All studies showed a moderate level of quality, with a consequent moderate possibility of associated bias, using the Newcastle-Ottawa Scale (NOS), with survival rate (SR) ranging between 91% to 100%. Bleeding on probing (BOP) were reported with an average value of 29.12%. Marginal integrity showed high success rate values for the observation periods, except for one that included patients with bruxism which obtained a SR of 31.60%. Failures and/or fractures, mostly total and requiring replacement, were observed in three studies. Linear regression showed that there was no statistical correlation between survival rate and type of cementation and the average years of follow-up (p=0.730 e p=0.454). There was high heterogeneity between studies (I2 = 93.74% and Q = 79.672). CONCLUSIONS Within the limitation of this study, monolithic zirconia might be considered as a possible option for restoring single crowns, especially in the posterior zone.
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Affiliation(s)
| | | | | | - Filipe Miguel Araújo
- Faculty of Dental Medicine, Universidade Católica Portuguesa, Center for Interdisciplinary Research in Health, Viseu, Portugal
| | - Helena Donato
- Coimbra Hospital and University Centre, Documentation Department, Coimbra, Portugal
| | - André Ricardo Maia Correia
- Faculty of Dental Medicine, Universidade Católica Portuguesa, Center for Interdisciplinary Research in Health, Viseu, Portugal
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15
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Tayyab M, Liu L, Lee CH. Efficient solar light facilitated photo-oxidative detoxification of gaseous 2-chloroethyl ethyl sulfide on ZrO 2-doped g-C 3N 4 under dry and humid air. Chemosphere 2021; 280:130685. [PMID: 33951582 DOI: 10.1016/j.chemosphere.2021.130685] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 04/19/2021] [Accepted: 04/21/2021] [Indexed: 06/12/2023]
Abstract
Photo-oxidation of chemical warfare agents is considered a promising strategy to cope with threats from accidental or intentional release. In this study, heterostructure photocatalysts comprising different amounts of zirconium oxide (ZrO2) over carbon nitride (CN) were synthesized via simple thermal exfoliation, followed by a precipitation method. The successful photocatalytic detoxification activity of the as-prepared photocatalyst was analyzed against 2-chloroethyl ethyl sulfide (CEES) under simulated solar light and natural sunlight irradiation in dry and humid air. As the CN/ZrO2 demonstrated a high surface area and oxygen doping, the addition of small amounts of the ZrO2 phase could lead to enhanced photoreactivity in surface chemistry. The as-prepared (CN/ZrO2-II) degraded 95% of CEES under simulated solar light and 70% under natural sunlight within 90 min. The photo-detoxification of CEES was associated with the generation of holes (h+) and activation of oxygen to superoxide radicals (•O2). Based on analysis results, a reaction mechanism was suggested. The activity of the used photocatalyst could be recovered to 90% of the fresh photocatalyst activity via simple water washing. However, as sulfurous compounds were accumulated on the surface in subsequent cyclic tests, solvent washing was also suggested to maintain high detoxification performance.
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Affiliation(s)
- Muhammad Tayyab
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Lei Liu
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Chang-Ha Lee
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, 03722, Republic of Korea.
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16
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Wang M, Zhang S, Chen L, Zou H, Wang Y, Xia H. Early soft tissue response to zirconium oxide and titanium healing abutments in vivo: a study in dogs. BMC Oral Health 2021; 21:416. [PMID: 34429083 PMCID: PMC8383379 DOI: 10.1186/s12903-021-01748-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 07/19/2021] [Indexed: 11/24/2022] Open
Abstract
Background This study aimed to investigate the clinical characteristics and early soft tissue response to zirconium oxide (Zr) and titanium (Ti) healing abutments in dogs. Methods Eight implants (four at each hemi-mandible) were inserted after bilateral mandibular third and fourth premolars and first molar extraction in dogs. Then, two Zr and two Ti healing abutments were connected to each unilateral mandible eight weeks later. The ligation method was used to create a peri-implant mucositis model and the 24 abutments were divided into four groups: Zr or Ti healing abutments with ligation (ZrL, TiL) or non-ligation (ZrN, TiN). The clinical indices, peri-implant crevicular fluid (PICF), and inflammatory cytokines (TNF-α and IL-1β) were measured and analyzed on days 0 and 28. The dogs were then sacrificed on day 28, soft tissues around the implants were harvested, and inflammation infiltration was tested by immunohistochemistry. Normal distribution test and two-way analysis of variance was used to analyze the data. Results The results showed that the clinical indices were similar for Zr and Ti healing abutments. There was significantly more PICF in the ZrL and TiL groups compared to in the ZrN and TiN groups. The TNF-α levels in PICF were significantly different between ZrL and ZrN groups on day 28. And the TNF-α levels in PICF were significantly higher in TiL group on day 28 than that on day 0. However, the number of inflammatory cells was not significantly different between the groups as measured by immunohistochemistry. Conclusions These data indicate that soft tissue responses to Zr healing abutments with peri-implant mucositis were comparable to those of Ti healing abutments in vivo, providing a theoretical foundation for the clinical application of Zr abutments.
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Affiliation(s)
- Min Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education and Department of Oral Implantology, School & Hospital of Stomatology, Wuhan University, Wuhan, 430079, China
| | - Shuang Zhang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education and Department of Preventive Dentistry, School and Hospital of Stomatology, Wuhan University, Wuhan, 430079, China
| | - Longjie Chen
- Lanzhou Hospital of Stomatology, Lanzhou, 730000, China
| | - Haixiao Zou
- Department of Stomatology, Second Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, 330006, China
| | - Yining Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education and Department of Prosthodontics, School and Hospital of Stomatology, Wuhan University, Wuhan, 430079, China
| | - Haibin Xia
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education and Department of Oral Implantology, School & Hospital of Stomatology, Wuhan University, Wuhan, 430079, China.
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17
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Wang Z, Zhang F, Vijver MG, Peijnenburg WJGM. Graphene nanoplatelets and reduced graphene oxide elevate the microalgal cytotoxicity of nano- zirconium oxide. Chemosphere 2021; 276:130015. [PMID: 33690035 DOI: 10.1016/j.chemosphere.2021.130015] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 02/02/2021] [Accepted: 02/17/2021] [Indexed: 05/24/2023]
Abstract
Novel products often have a multitude of nanomaterials embedded; likewise within many products graphite-based products are decorated with nano-zirconium oxide (nZrO2) because graphene is an ultrahigh conductive material whereas nZrO2 is for instance fire-retardant. As a consequence, the pristine/isolated nanoparticle has unique beneficial properties but it is no longer the only compound that needs to be considered in risk assessment. Data on joint toxicological implications are particularly important for the hazard assessment of multicomponent nanomaterials. Here, we investigated the mechanisms underlying the cytotoxicity induced by the co-occurrence of nZrO2 and two graphene nanomaterials including graphene nanoplatelets (GNPs) and reduced graphene oxide (RGO) to the freshwater algae Chlorella pyrenoidosa. Exposure to GNPs and/or RGO induced enhanced cytotoxicity of nZrO2 to the algae. Intracellular oxidative stress and cellular membrane functional changes in C. pyrenoidosa were the reason for the enhancement of toxicity induced by the binary mixtures of GNPs/RGO and nZrO2. Furthermore, mitochondria-generated ROS played a major role in regulating the treatment-induced cellular response in the algae. Observations of cellular superficial- and ultra-structures indicated that the binary mixtures provoked oxidative damage to the algal cells. RGO increased the cytotoxicity and the extent of cellular oxidative stress to a higher extent than GNPs. These findings provide new insights that are of use in the risk assessment of mixtures of graphene-based carbon nanomaterials and other ENPs, and fit the new ideas on product testing that respects the combination effects.
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Affiliation(s)
- Zhuang Wang
- School of Environmental Science and Engineering, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science and Technology, Nanjing, 210044, PR China.
| | - Fan Zhang
- Institute of Environmental Sciences (CML), Leiden University, PO Box 9518, 2300 RA, Leiden, the Netherlands
| | - Martina G Vijver
- Institute of Environmental Sciences (CML), Leiden University, PO Box 9518, 2300 RA, Leiden, the Netherlands
| | - Willie J G M Peijnenburg
- Institute of Environmental Sciences (CML), Leiden University, PO Box 9518, 2300 RA, Leiden, the Netherlands; National Institute of Public Health and the Environment (RIVM), Center for the Safety of Substances and Products, PO Box 1, 3720 BA, Bilthoven, the Netherlands
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18
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Schwindling FS, Bechtel KN, Zenthöfer A, Handermann R, Rammelsberg P, Rues S. In-vitro fit of experimental full-arch restorations made from monolithic zirconia. J Prosthodont Res 2021; 66:258-264. [PMID: 34305088 DOI: 10.2186/jpr.jpr_d_20_00321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE Fabrication inaccuracies can compromise the fit of large-span monolithic zirconia restorations. Sintering distortion is a particular problem. This study aimed to assess the fit of full-arch restorations made from mono lithic zirconia for different abutment configurations. METHODS To quantify fit inaccuracies created during the fabrication of experimental large-span restorations, an in-vitro model with eight abutment teeth was equipped with strain gauges. Ten 14-unit restorations were made from monolithic zirconia and seated on the model in turn. For each of the ten restorations, measurements were taken for three different abutment configurations-polygonal, quadrangular, and unilaterally shortened. Strains exerted during seating were recorded in the anterior-posterior and buccal-palatal directions, and the resulting horizontal forces (rhF) were calculated along with the respective abutment deflection (ad). Data were analyzed using Kruskal-Wallis tests at a significance level of 0.05. RESULTS All restorations could be seated on the multi-abutment model. The restorations exhibited fabrication misfits, tending to be too wide. Mean rhF/ad were largest for the quadrangular configuration (16.8±2.9 N/0.065 mm) and smallest for the polygonal configuration (13.6±4.5 N/0.053 mm). The largest rhF/ad were measured on abutments of the unilaterally shortened configuration, with a maximum deflection of 0.126 mm. For two of three configurations, rhF/ad were significantly larger for the distal abutments than for the other abutments. CONCLUSIONS Even if milling and sintering procedures are optimum, misfit-induced horizontal forces cannot be avoided. Because of the natural tooth mobility, however, the fit of full-arch restorations made from monolithic zirconia might be clinically acceptable.
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Affiliation(s)
| | | | - Andreas Zenthöfer
- Department of Prosthodontics, Heidelberg University Hospital, Heidelberg
| | - Rebecca Handermann
- Department of Prosthodontics, Heidelberg University Hospital, Heidelberg
| | - Peter Rammelsberg
- Department of Prosthodontics, Heidelberg University Hospital, Heidelberg
| | - Stefan Rues
- Department of Prosthodontics, Heidelberg University Hospital, Heidelberg
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19
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Aati S, Akram Z, Ngo H, Fawzy AS. Development of 3D printed resin reinforced with modified ZrO 2 nanoparticles for long-term provisional dental restorations. Dent Mater 2021; 37:e360-e374. [PMID: 33663884 DOI: 10.1016/j.dental.2021.02.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 01/25/2021] [Accepted: 02/12/2021] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To characterize and investigate efficacy of loading functionalized ZrO2 nanoparticles in 3-dimensional (3D) printed acrylate ester-based resin subjected to accelerated aging in artificial saliva. As well as to evaluate the effect of ZrO2 nanoparticle volume fraction addition on mechanical and physical properties of printed composite. METHODS Functionalized ZrO2 nanoparticles were characterized using TEM and Raman spectroscopy. 3D printed dental resin was reinforced, with ZrO2 nanoparticles, in the concentration range (0-5wt.%). The resulted nanocomposites, in term of structure and physical/mechanical properties were evaluated using different mechanical testing, microscopic and spectroscopic techniques. RESULTS ZrO2 based nanocomposite was successful and formed composites were more ductile. Degree of conversion was significant at the highest level with blank resin and 1wt.%. Sorption revealed reduction associated with volume fraction significant to neat resin, however solubility indicated neat and 4wt.% had the lowest significant dissolution. Vickers represented critical positive correlation with filler content, while nanohardness and elasticity behaved symmetrically and had the maximum strength at 3wt.% addition. In addition, 3wt.% showed the highest fracture toughness and modulus. Improvement of flexural strength was significantly linked to filler concentration. Overall properties dramatically were enhanced after 3 months aging in artificial saliva, especially degree of conversion, microhardness, nanoindentation/elasticity, and flexural modulus. However, significant reduction was observed with flexural modulus and fracture toughness. SIGNIFICANCE The outcomes suggest that the newly developed 3D printed nanocomposites modified with ZrO2 nanoparticle have the superior potential and efficacy as long-term provisional dental restoration materials.
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Affiliation(s)
- Sultan Aati
- UWA Dental School, University of Western Australia, 17 Monash Avenue, Nedlands WA 6009, Australia; Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh, 11433, Saudi Arabia
| | - Zohaib Akram
- UWA Dental School, University of Western Australia, 17 Monash Avenue, Nedlands WA 6009, Australia
| | - Hien Ngo
- UWA Dental School, University of Western Australia, 17 Monash Avenue, Nedlands WA 6009, Australia
| | - Amr S Fawzy
- UWA Dental School, University of Western Australia, 17 Monash Avenue, Nedlands WA 6009, Australia.
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20
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Al-Aali KA, Alresayes S, Alhenaki AM, Vohra F, Abduljabbar T. Influence of time and hydration (ageing) on flexural strength of Yttrium stabilized Zirconia polycrystals (Y-TZP) fabricated with different CAD-CAM Systems. Pak J Med Sci 2021; 37:833-839. [PMID: 34104174 PMCID: PMC8155407 DOI: 10.12669/pjms.37.3.3996] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Objectives: To evaluate the effect of time and hydration (ageing) on flexural strength of yttrium-stabilized zirconia polycrystals (Y-TZP) zirconia fabricated from three different materials. Methods: This in-vitro study was performed from June to September 2019. Y-TZP bars, measuring 2 x 3 x 20 mm were prepared and sintered from three different materials, Group-1: LAVA™ Zirconia (3M ESPE, US) (control) Group-2: Vita In-Ceram YZ (VITA, Germany) and Group-3: Aadva™ Zirconia (Zr) (GC Advanced technologies Inc.). 30 zirconia bars per group were prepared using sectioning of blocks with isomet saw. Followed by sintering in furnaces for recommended temperature cycles. One side of bars were polished and beveled for flexural testing. Groups of specimens were divided into subgroups of 3 (n=10) based on the ageing (distilled water in the incubator at 37ºC) durations (48 Hrs and two and half years). Ten specimens in each material groups were not aged (controls). Samples were exposed to a static force in a three-point bend test using a universal instron-testing machine until fracture. Scanning electron microscopic assessment was performed for fractured specimens for ageing. Data was analyzed using ANOVA and Tukey post hoc test. Results: The mean flexural strength at baseline for Group-1: LAVA™ Zirconia, group (632.7 ± 136.5 MPa) 2: Vita In-Ceram YZ (1036.3 ± 229.6 MPa), and Group-3: Aadva™ Zirconia (1171.3 ± 266.3 MPa) were significantly different. Group-2 and Group-3 specimens showed higher strength compared to Group-1 specimens, irrespective of the ageing duration (p<0.05). Analysis of pooled data for flexural strength for materials by aging period (baseline, after 48 hours and after 2 and ½ years) showed that there was significant reduction of strength with increasing duration (p<0.05). Conclusions: Y-TZP showed variations in flexural strength depending on the material type. Ageing duration exhibited significant influence on the flexural strength of Y-TZP when comparing no ageing to two and half years. Vita In-Ceram YZ and Aadva Zirconia (Zr) showed higher and clinically acceptable flexural strength outcomes.
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Affiliation(s)
- Khulud A Al-Aali
- Khulud A. Al Aali, Department of Clinical Dental Sciences, College of Dentistry, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Saad Alresayes
- Saad Alresayes, Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Aasem M Alhenaki
- Aasem M Alhenaki, Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Fahim Vohra
- Fahim Vohra, Department of Prosthetic Dental Sciences, Research Chair for Biological Research in Dental Health College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Tariq Abduljabbar
- Tariq Abduljabbar. Department of Prosthetic Dental Sciences, Research Chair for Biological Research in Dental Health, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
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21
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Bui TH, Hong SP, Kim C, Yoon J. Performance analysis of hydrated Zr(IV) oxide nanoparticle-impregnated anion exchange resin for selective phosphate removal. J Colloid Interface Sci 2020; 586:741-747. [PMID: 33198977 DOI: 10.1016/j.jcis.2020.10.143] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/29/2020] [Accepted: 10/30/2020] [Indexed: 12/18/2022]
Abstract
The superior removal selectivity of hydrated zirconium oxide nanoparticle-impregnated porous anion exchange resin (ZAE) highlights its use as phosphate removal adsorbent. However, most research examines selective phosphate removal performance using randomly determined single content of hydrated zirconium oxide, and thus the use of the ZAE in real applications remains limited. Therefore, this study aimed to investigate the selective phosphate removal performance of ZAE with different content of hydrated zirconium oxide nanoparticle (HZO NP, represented by zirconium content) by considering various conditions. A molybdate intermediate method was devised to fabricate ZAE with high loaded HZO by weakening the Donnan exclusion to HZO precursors produced from the fixed positively charged host. Consequently, the resultant ZAE was characterized by 17.8 wt% of zirconium. ZAE exhibited an increased selectivity to phosphate against competing ions in the synthetic and simulated real water matrices for both batch and fixed-bed modes as the zirconium content of ZAE increased. High performance was retained, and regeneration led to possible reusability. The linear correlation between selective phosphate removal performances and zirconium content indicates that the zirconium content is a fundamental factor determining the ZAE phosphate adsorption removal. The HZO NPs within ZAE slow adsorption kinetics by blocking AE pores and provide specific adsorption sites for phosphate removal by inner-sphere complexation.
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Affiliation(s)
- Trung Huu Bui
- Faculty of Chemical and Food Technology, Ho Chi Minh City University of Technology and Education, Ho Chi Minh City, Viet Nam; School of Chemical and Biological Engineering, College of Engineering, Institute of Chemical Process, Seoul National University (SNU), Gwanak-gu, Daehak-dong, Seoul 08826, Republic of Korea
| | - Sung Pil Hong
- School of Chemical and Biological Engineering, College of Engineering, Institute of Chemical Process, Seoul National University (SNU), Gwanak-gu, Daehak-dong, Seoul 08826, Republic of Korea
| | - Choonsoo Kim
- Department of Environmental Engineering and Institute of Energy/Environment Convergence Technologies, Kongju National University, 1223-24, Cheonan-daero, Cheonan-si 31080, Republic of Korea.
| | - Jeyong Yoon
- School of Chemical and Biological Engineering, College of Engineering, Institute of Chemical Process, Seoul National University (SNU), Gwanak-gu, Daehak-dong, Seoul 08826, Republic of Korea; Korea Environment Institute, 370 Sicheong-daero, Sejong-si 30147, Republic of Korea.
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Mehdikhani H, Aqababa H, Sadeghi L. Effect of Zirconium oxide nanoparticle on serum level of testosterone and spermatogenesis in the rat: An experimental study. Int J Reprod Biomed 2020; 18:765-776. [PMID: 33062922 PMCID: PMC7521169 DOI: 10.18502/ijrm.v13i9.7671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 05/12/2019] [Accepted: 01/01/2020] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND Zirconium nanoparticles are used as health agents, pharmaceutical carriers, and in dental and orthopedic implants. OBJECTIVE This studyaimed to investigate the effects of Zirconium oxide nanoparticles on the process of spermatogenesis in rat. MATERIALS AND METHODS In this experimental study, 32 male Wistar rats (150-200 gr), with range of age 2.5 to 3 months were used and divided into four groups of eight per each. The control group received 0.5 ml of distilled water and the three experimental groups received 50, 200, and 400 ppm doses of Zirconium oxide nanoparticles solution over a 30-day period, respectively. At the end of the experiment, tissue sections were taken from the testis and stained with hematoxylin-eosin. Serum concentration of testosterone was measured by enzyme-linked immunosorbent assay. RESULTS In the experimental group receiving 400 ppm Zirconium oxide nanoparticles, the number of Spermatogonia cells (p ≤ 0.01), Spermatocytes (p ≤ 0.01), Spermatids (p ≤ 0.001), and sertoli and Leydig cells (p ≤ 0.05) showed a significant decrease compared to the control group. Serum testosterone concentration did not change significantly in all experimental groups receiving Zirconium oxide nanoparticles compared to the control group. Experimental group received 400 ppm Zirconium oxide nanoparticles shrinkage of seminal tubules and reduced lumen space compared to control group. CONCLUSION Zirconium oxide nanoparticles are likely to damage the testes by increasing Reactive oxygen species production and free radicals.
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Affiliation(s)
| | - Heydar Aqababa
- Department of Biology, Arsanjan Branch, Islamic Azad University, Arsanjan, Iran
| | - Ladan Sadeghi
- Department of Biology, Arsanjan Branch, Islamic Azad University, Arsanjan, Iran
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Wu JL, McIntyre PW, Hong JM, Yassen GH, Bruzzaniti A. Effects of radiopaque double antibiotic pastes on the proliferation, alkaline phosphatase activity and mineral deposition of dental pulp stem cells. Arch Oral Biol 2020; 117:104764. [PMID: 32485262 DOI: 10.1016/j.archoralbio.2020.104764] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 05/04/2020] [Accepted: 05/06/2020] [Indexed: 11/24/2022]
Abstract
OBJECTIVE The aim of this study was to investigate the effects of two radiopaque agents, barium sulfate (BaSO4) or zirconium oxide (ZrO2) in double antibiotic paste (DAP), on the proliferation and mineral deposition of human dental pulp stem cells (DPSC). MATERIALS AND METHODS Radiopaque antimicrobial medicaments composed of methylcellulose (MC) thickening polymer with BaSO4 or ZrO2 and either 1 or 5 mg/mL DAP (equal portions of metronidazole and ciprofloxacin) were used to investigate DPSC proliferation after 3 days, and alkaline phosphatase (ALP) activity and mineral deposition after 7 and 14 days. Radiopaque agents without DAP and Ca(OH)2 were used as controls. RESULTS MC-BaSO4 DAP and MC-ZrO2 DAP at 1 or 5 mg/mL had no adverse effect on DPSC proliferation, compared to the media and MC controls. MC-ZrO2 (DAP-free) greatly increased ALP activity after 7 days. DPSC mineral deposition was modestly reduced at 7 days by MC-BaSO4 DAP and MC-ZrO2 DAP, but not by DAP-free radiopaque agents, and was most reduced by 5 mg/mL DAP in the 14-day cultures. CONCLUSIONS MC-BaSO4 or MC-ZrO2 medicaments containing up to 5 mg/mL of DAP supported the proliferation and early osteogenic differentiation of DPSC. Low DAP concentrations and short culture times led to more favorable effects on ALP activity and mineral deposition by DPSC. The findings suggest that radiopaque agents added for the purpose of detecting whether medicaments occupy the full extent of the root canal may have clinical applications. Radiopaque antibiotic medicaments containing low DAP concentrations may be an alternative to Ca(OH)2 for regenerative endodontic procedures.
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Affiliation(s)
- Jennifer L Wu
- Department of Biomedical Sciences & Comprehensive Care, Indiana University School of Dentistry, 1121 W Michigan St, Indianapolis, IN, 46202, USA
| | - Patrick W McIntyre
- Department of Biomedical Sciences & Comprehensive Care, Indiana University School of Dentistry, 1121 W Michigan St, Indianapolis, IN, 46202, USA
| | - Jung Min Hong
- Department of Biomedical Sciences & Comprehensive Care, Indiana University School of Dentistry, 1121 W Michigan St, Indianapolis, IN, 46202, USA
| | - Ghaeth H Yassen
- Department of Endodontics, Case Western Reserve School of Dental Medicine, 2124 Cornell Rd, Cleveland, OH, 44106, USA.
| | - Angela Bruzzaniti
- Department of Biomedical Sciences & Comprehensive Care, Indiana University School of Dentistry, 1121 W Michigan St, Indianapolis, IN, 46202, USA.
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Cho DW, Park J, Kwon G, Lee J, Yim GJ, Jung W, Cheong YW. Zirconia-Assisted Pyrolysis of Coffee Waste in CO 2 Environment for the Simultaneous Production of Fuel Gas and Composite Adsorbent. J Hazard Mater 2020; 386:121989. [PMID: 31896001 DOI: 10.1016/j.jhazmat.2019.121989] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 12/12/2019] [Accepted: 12/27/2019] [Indexed: 06/10/2023]
Abstract
This work newly employed monoclinic zirconia (ZrO2) as a promoter to improve CO2 pyrolysis of coffee waste (CW). The CO2 pyrolysis of CW presented the high level of CO production (14.3 mol%) during two stages of non-isothermal (280 to 700 °C) and isothermal pyrolysis (kept at 700 °C). At the same condition, the incorporation of ZrO2 improved the CO generation up to about twice that of CW (29.5 mol%) by possibly inducing more conversion of pyrolytic oil into gas. The characterization results exhibited that ZrO2-impregnated biochar (ZrB) possessed the distinctive surface morphology that highly graphitic- and porous carbon layers were covered by ZrO2 nanoparticle clusters. In a series of adsorption experiments, ZrB composite showed pH-dependent As(V) adsorption and pH neutralization ability. The adsorption proceeded relatively rapid with 95% removal during 120 min in the early stage, followed by 5% removal in the remaining 240 min. The maximum adsorption capacity was found to be 25.2 mg g-1 at final pH 8. The reusability and stability of ZrB were demonstrated in the 6 consecutive cycles of adsorption/desorption. As a result, ZrO2-assisted CO2 pyrolysis can potentially produce fuel gas with high CO fraction and composite adsorbent suitable for As(V) removal in acidic wastewater.
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Affiliation(s)
- Dong-Wan Cho
- Geological Environment Division, Korea Institute of Geoscience and Mineral Resources, Gwahak-ro 124, Yuseong-gu, Daejeon 34132, Republic of Korea
| | - Jihyun Park
- Geological Environment Division, Korea Institute of Geoscience and Mineral Resources, Gwahak-ro 124, Yuseong-gu, Daejeon 34132, Republic of Korea
| | - Gihoon Kwon
- Department of Environment and Energy, Sejong University, Seoul 05006, Republic of Korea
| | - Joonhak Lee
- Geological Environment Division, Korea Institute of Geoscience and Mineral Resources, Gwahak-ro 124, Yuseong-gu, Daejeon 34132, Republic of Korea
| | - Gil-Jae Yim
- Geological Environment Division, Korea Institute of Geoscience and Mineral Resources, Gwahak-ro 124, Yuseong-gu, Daejeon 34132, Republic of Korea
| | - Woosik Jung
- Environmental and Plant Engineering Research Institute, Korea Institute of Civil and Building Technology, Goyang, Gyeonggi, Republic of Korea.
| | - Young-Wook Cheong
- Geological Environment Division, Korea Institute of Geoscience and Mineral Resources, Gwahak-ro 124, Yuseong-gu, Daejeon 34132, Republic of Korea.
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Ao H, Cao W, Hong Y, Wu J, Wei L. Adsorption of sulfate ion from water by zirconium oxide-modified biochar derived from pomelo peel. Sci Total Environ 2020; 708:135092. [PMID: 31806309 DOI: 10.1016/j.scitotenv.2019.135092] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 10/15/2019] [Accepted: 10/19/2019] [Indexed: 06/10/2023]
Abstract
Zirconium oxide-modified pomelo peel biochar (ZrBC) was synthesized for the adsorption of sulfate ion from aqueous solution. Zirconyl chloride octahydrate (ZCO) was used to modify pomelo peel biochar into ZrBC. The optimal dose of ZCO for modification is 0.5 mol/L, at which ZrBC shows the highest adsorption of sulfate ion. The adsorbents were characterized by the field emission scanning electron microscopy, X-ray photoelectron spectroscopy and surface area measurement. The results confirm that the presence of zirconium oxides and hydroxide groups on the ZrBC surface, and ZrBC has a porous structure and a higher specific surface area in comparison with pomelo peel biochar. ZrBC shows good affinity for sulfate ion with a maximum sulfate adsorption capacity of 35.21 mg/g, which is much higher than that of pomelo peel biochar (1.02 mg/g). The adsorption of sulfate on ZrBC is pH dependent, and acidic conditions favor the adsorption. The adsorption can reach near-equilibrium in approximately 120 min. The adsorption kinetics and isotherm follow the pseudo second-order equation and Langmuir adsorption model, respectively. Furthermore, nitrate and fluoride anions exhibit little influence on the adsorption of sulfate by ZrBC, whereas phosphate inhibits the adsorption under the same concentration conditions. ZrBC has the potential to be used for removal of sulfate from aqueous solution.
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Affiliation(s)
- Hanting Ao
- College of Civil Engineering, Huaqiao University, Xiamen 361021, China
| | - Wei Cao
- College of Civil Engineering, Huaqiao University, Xiamen 361021, China.
| | - Yixia Hong
- College of Civil Engineering, Huaqiao University, Xiamen 361021, China
| | - Jun Wu
- College of Civil Engineering, Huaqiao University, Xiamen 361021, China
| | - Lin Wei
- College of Civil Engineering, Huaqiao University, Xiamen 361021, China
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Guan T, Kuang Y, Li X, Fang J, Fang W, Wu D. The recovery of phosphorus from source-separated urine by repeatedly usable magnetic Fe 3O 4@ZrO 2 nanoparticles under acidic conditions. Environ Int 2020; 134:105322. [PMID: 31739135 DOI: 10.1016/j.envint.2019.105322] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 09/07/2019] [Accepted: 11/11/2019] [Indexed: 06/10/2023]
Abstract
The separation of urine at source for phosphorus (P) recovery is attractive taking into account the high P concentration and small volume. However, the treatment of urine is still challenging due to its unpleasant odor and hygiene problems. Because the above problems could be solved by acidification to keep the pH of urine below 4, we propose a novel strategy to recover P from acidified urine using tailored hydrous zirconia-coated magnetite nanoparticles (Fe3O4@ZrO2). This strategy involves the selective adsorption of phosphate by easily separable and reusable Fe3O4@ZrO2, the desorption of adsorbed phosphate, and the precipitation of desorbed phosphate as calcium phosphate fertilizer. The results indicated that at pH 4, the P in synthetic urine was selectively adsorbed and could be exhausted using Fe3O4@ZrO2. Nearly all (>97.5%) of the sequestered P on the Fe3O4@ZrO2 nanoparticles was stripped using ≥1 M NaOH solution and ~100% of the stripped P was then successfully transformed into calcium phosphate, upon adding CaCl2 at pH >12 and a Ca/P molar ratio of 3. The liquid/solid (Fe3O4@ZrO2 particles) mixture could be conveniently separated for reuse using an external magnetic field. The reusability of the Fe3O4@ZrO2 nanoparticles in the extraction of P from synthetic urine was confirmed using five cycles of the adsorption-desorption process and their performance validated using real urine samples. The mechanism of phosphate adsorption was investigated using XPS, FTIR and zeta potential measurements, showing that phosphate was chemically adsorbed on the surface through direct coordination to zirconium atom via ligand exchange.
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Affiliation(s)
- Tong Guan
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai 200240, China
| | - Yue Kuang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai 200240, China
| | - Xiaodi Li
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai 200240, China
| | - Jing Fang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai 200240, China
| | - Wenkan Fang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai 200240, China
| | - Deyi Wu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai 200240, China.
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Oluwabi AT, Gaspar D, Katerski A, Mere A, Krunks M, Pereira L, Oja Acik I. Influence of Post-UV/Ozone Treatment of Ultrasonic-Sprayed Zirconium Oxide Dielectric Films for a Low-Temperature Oxide Thin Film Transistor. Materials (Basel) 2019; 13:ma13010006. [PMID: 31861357 PMCID: PMC6981653 DOI: 10.3390/ma13010006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 11/29/2019] [Accepted: 12/13/2019] [Indexed: 11/30/2022]
Abstract
Solution-processed metal oxides require a great deal of thermal budget in order to achieve the desired film properties. Here, we show that the deposition temperature of sprayed zirconium oxide (ZrOx) thin film can be lowered by exposing the film surface to an ultraviolet (UV) ozone treatment at room temperature. Atomic force microscopy reveals a smooth and uniform film with the root mean square roughness reduced from ~ 0.63 nm (UVO-O) to ~ 0.28 nm (UVO-120) in the UV–ozone treated ZrOx films. X-ray photoelectron spectroscopy analysis indicates the formation of a Zr–O network on the surface film, and oxygen vacancy is reduced in the ZrOx lattice by increasing the UV–ozone treatment time. The leakage current density in Al/ZrOx/p-Si structure was reduced by three orders of magnitude by increasing the UV-ozone exposure time, while the capacitance was in the range 290–266 nF/cm2, corresponding to a relative permittivity (k) in the range 5.8–6.6 at 1 kHz. An indium gallium zinc oxide (IGZO)-based thin film transistor, employing a UV-treated ZrOx gate dielectric deposited at 200 °C, exhibits negligible hysteresis, an Ion/Ioff ratio of 104, a saturation mobility of 8.4 cm2 V−1S−1, a subthreshold slope of 0.21 V.dec−1, and a Von of 0.02 V. These results demonstrate the potentiality of low-temperature sprayed amorphous ZrOx to be applied as a dielectric in flexible and low-power-consumption oxide electronics.
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Affiliation(s)
- Abayomi Titilope Oluwabi
- Laboratory of Thin Film Chemical Technologies, Department of Materials and Environmental Technology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
- Correspondence: (A.T.O.); (I.O.A.); Tel.: +372-5671-0366 (A.T.O.); +372-620-3369 (I.O.A.)
| | - Diana Gaspar
- i3N/CENIMAT, Department of Materials Science School of Science and Technology, FCT-NOVA, Universidade NOVA de Lisboa and CEMOP/UNINOVA, Campus de Caparica, 2829-516 Caparica, Portugal
| | - Atanas Katerski
- Laboratory of Thin Film Chemical Technologies, Department of Materials and Environmental Technology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
| | - Arvo Mere
- Laboratory of Thin Film Chemical Technologies, Department of Materials and Environmental Technology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
| | - Malle Krunks
- Laboratory of Thin Film Chemical Technologies, Department of Materials and Environmental Technology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
| | - Luis Pereira
- i3N/CENIMAT, Department of Materials Science School of Science and Technology, FCT-NOVA, Universidade NOVA de Lisboa and CEMOP/UNINOVA, Campus de Caparica, 2829-516 Caparica, Portugal
| | - Ilona Oja Acik
- Laboratory of Thin Film Chemical Technologies, Department of Materials and Environmental Technology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
- Correspondence: (A.T.O.); (I.O.A.); Tel.: +372-5671-0366 (A.T.O.); +372-620-3369 (I.O.A.)
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Leão RDS, Moraes SLDD, Gomes JMDL, Lemos CAA, Casado BGDS, Vasconcelos BCDE, Pellizzer EP. Influence of addition of zirconia on PMMA: A systematic review. Mater Sci Eng C Mater Biol Appl 2019; 106:110292. [PMID: 31753402 DOI: 10.1016/j.msec.2019.110292] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Revised: 09/23/2019] [Accepted: 10/07/2019] [Indexed: 11/28/2022]
Abstract
The objective of this systematic review is to evaluate the effect of the incorporation of zirconia (ZrO2) particles on the mechanical properties of PMMA (polymethyl methacrylate), and to establish which characteristics of this material yield the best results aiming their biomedical applicability. This study was carried out in accordance with the Items of Preferred Reports for Systematic Reviews and Meta-Analyzes (PRISMA) and is registered in PROSPERO under registration number: CRD42018095801. The searches were carried out in the PubMed, MEDLINE, Scopus and Cochrane Library databases for articles published up until April 2018. After the different stages of the article selection process, eight articles were selected for qualitative and quantitative analysis. All were in vitro studies, totaling 536 evaluated samples. The concentrations of zirconia ranged from 0.5% to 20% and the particle sizes were between 15 nm and 10 μm. The incorporation of zirconia particles did not increase the flexural strength of PMMA in only one study. While the concentration of zirconia influences PMMA, the type of acrylic resin, size, and silanization of zirconia particles did not influence the results. Thus, the addition of zirconia particles showed a positive effect on PMMA enhancing their use in the medical and dental field, especially when certain anatomical areas requires higher strength of the materials, providing longevity for the rehabilitation.
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Affiliation(s)
- Rafaella de Souza Leão
- Department of Prosthodontics, Dentistry School, University of Pernambuco (UPE), Camaragibe, Brazil
| | | | - Jéssica Marcela de Luna Gomes
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, São Paulo State University (UNESP), Araçatuba, Brazil
| | | | | | | | - Eduardo Piza Pellizzer
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, São Paulo State University (UNESP), Araçatuba, Brazil
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Shehzad K, Ahmad M, He J, Liu T, Xu W, Liu J. Synthesis of ultra-large ZrO 2 nanosheets as novel adsorbents for fast and efficient removal of As(III) from aqueous solutions. J Colloid Interface Sci 2018; 533:588-597. [PMID: 30193145 DOI: 10.1016/j.jcis.2018.08.079] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 08/19/2018] [Accepted: 08/22/2018] [Indexed: 11/30/2022]
Abstract
Consumption of water having excessive arsenic (As) contamination can cause adverse health effects on human beings. In this study, novel ultra-large zirconium oxide (ZrO2) nanosheets were successfully synthesized using graphene oxide (GO) templates and their adsorption-ability was studied for arsenite (As(III)). Owing to higher values of surface area, numbers of available hydroxyl groups and strong chemisorption binding affinity towards As(III), the synthesized novel ultra-large ZrO2 nanosheets showed high adsorption-ability for As(III) over a wide pH range. Experimental results demonstrated that the maximum adsorption-ability of the ZrO2 nanosheets for As(III) reached to 74.9 mg/g at pH 6. BET, zeta potential, effect of initial pH, FTIR and XPS have been used to analyze the As(III) adsorption process on the ZrO2 nanosheets. The experiments for effects of co-existing ions indicated that ZrO2 nanosheets possessed good anti-interference ability towards co-existing ions. Furthermore, the ZrO2 nanosheets demonstrated very fast and excellent treatment of simulated real As(III) polluted water, consequently the effluent concentration met the standard regulated by World Health Organization. This study suggested that the as-prepared ZrO2 nanosheets could be potentially applied in practical drinking water treatment.
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Affiliation(s)
- Khurram Shehzad
- Nanomaterials and Environmental Detection Laboratory, Institute of Intelligent Machines, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; University of Science and Technology of China, Hefei 230026, China
| | - Mukhtar Ahmad
- Nanomaterials and Environmental Detection Laboratory, Institute of Intelligent Machines, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; Department of Physics, COMSATS Institute of Information Technology, Lahore, Pakistan
| | - Junyong He
- Nanomaterials and Environmental Detection Laboratory, Institute of Intelligent Machines, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; University of Science and Technology of China, Hefei 230026, China
| | - Tao Liu
- Nanomaterials and Environmental Detection Laboratory, Institute of Intelligent Machines, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; University of Science and Technology of China, Hefei 230026, China
| | - Weihong Xu
- Nanomaterials and Environmental Detection Laboratory, Institute of Intelligent Machines, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.
| | - Jinhuai Liu
- Nanomaterials and Environmental Detection Laboratory, Institute of Intelligent Machines, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.
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Wu K, Chen Y, Ouyang Y, Lei H, Liu T. Adsorptive removal of fluoride from water by granular zirconium-aluminum hybrid adsorbent: performance and mechanisms. Environ Sci Pollut Res Int 2018; 25:15390-15403. [PMID: 29564704 DOI: 10.1007/s11356-018-1711-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2018] [Accepted: 03/07/2018] [Indexed: 06/08/2023]
Abstract
Granular zirconium-aluminum hybrid adsorbent (GZAHA) was fabricated for efficient defluoridation of groundwater in filter application. GZAHA was formed through the aggregation of massive Zr/Al oxide nanoparticles with an amorphous pattern. This adsorbent has a satisfactory mechanical strength, a specific surface area of 29.55 m2/g, and numerous hydroxyl groups on the surface. F adsorption equilibrium could be achieved within 12 h, and the sorption process followed a pseudo-second-order reaction rate. The maximum adsorption capacity of F estimated from the Langmuir model was 65.07 mg/g at 25 °C, being greater than most of other granular adsorbents. The removal efficiency of F could be maintained in a wide pH range of 5~9. The presence of phosphate posed an adverse effect on F adsorption due to the competition mechanisms. The saturated adsorbents could be regenerated and reused for four times by using sodium hydroxide solution as an eluent, and the adsorption capacity remained around 80%. Besides electrostatic attraction and Al-F complex, surface complexation and anion exchange were also involved in the adsorption process. Continuous adsorption experiments illustrated that 808 bed volumes of F-contaminated water (F = 5 mg/L) were treated successfully by a GZAHA-packed column without second pollution.
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Affiliation(s)
- Kun Wu
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No.13, Yanta Road, Beiling District, Xi'an, Shaanxi, 710055, China.
| | - Yuanyuan Chen
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No.13, Yanta Road, Beiling District, Xi'an, Shaanxi, 710055, China
| | - Yongqiang Ouyang
- College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Hang Lei
- College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Ting Liu
- College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China
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Khomenkova L, Lehninger D, Kondratenko O, Ponomaryov S, Gudymenko O, Tsybrii Z, Yukhymchuk V, Kladko V, von Borany J, Heitmann J. Effect of Ge Content on the Formation of Ge Nanoclusters in Magnetron-Sputtered GeZrO x-Based Structures. Nanoscale Res Lett 2017; 12:196. [PMID: 28314364 PMCID: PMC5355413 DOI: 10.1186/s11671-017-1960-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Accepted: 02/27/2017] [Indexed: 06/06/2023]
Abstract
Ge-rich ZrO2 films, fabricated by confocal RF magnetron sputtering of pure Ge and ZrO2 targets in Ar plasma, were studied by multi-angle laser ellipsometry, Raman scattering, Auger electron spectroscopy, Fourier transform infrared spectroscopy, and X-ray diffraction for varied deposition conditions and annealing treatments. It was found that as-deposited films are homogeneous for all Ge contents, thermal treatment stimulated a phase separation and a formation of crystalline Ge and ZrO2. The "start point" of this process is in the range of 640-700 °C depending on the Ge content. The higher the Ge content, the lower is the temperature necessary for phase separation, nucleation of Ge nanoclusters, and crystallization. Along with this, the crystallization temperature of the tetragonal ZrO2 exceeds that of the Ge phase, which results in the formation of Ge crystallites in an amorphous ZrO2 matrix. The mechanism of phase separation is discussed in detail.
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Affiliation(s)
- L. Khomenkova
- V. Lashkaryov Institute of Semiconductor Physics of NAS of Ukraine, 45 Pr.Nauky, 03028 Kyiv, Ukraine
| | - D. Lehninger
- Institute of Applied Physics, TU Bergakademie Freiberg, D-09596 Freiberg, Germany
| | - O. Kondratenko
- V. Lashkaryov Institute of Semiconductor Physics of NAS of Ukraine, 45 Pr.Nauky, 03028 Kyiv, Ukraine
| | - S. Ponomaryov
- V. Lashkaryov Institute of Semiconductor Physics of NAS of Ukraine, 45 Pr.Nauky, 03028 Kyiv, Ukraine
| | - O. Gudymenko
- V. Lashkaryov Institute of Semiconductor Physics of NAS of Ukraine, 45 Pr.Nauky, 03028 Kyiv, Ukraine
| | - Z. Tsybrii
- V. Lashkaryov Institute of Semiconductor Physics of NAS of Ukraine, 45 Pr.Nauky, 03028 Kyiv, Ukraine
| | - V. Yukhymchuk
- V. Lashkaryov Institute of Semiconductor Physics of NAS of Ukraine, 45 Pr.Nauky, 03028 Kyiv, Ukraine
| | - V. Kladko
- V. Lashkaryov Institute of Semiconductor Physics of NAS of Ukraine, 45 Pr.Nauky, 03028 Kyiv, Ukraine
| | - J. von Borany
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, D-01314 Dresden, Germany
| | - J. Heitmann
- Institute of Applied Physics, TU Bergakademie Freiberg, D-09596 Freiberg, Germany
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Chougule KJ, Wadkar AP. An In vitro Comparative Evaluation of Flexural Strength of Monolithic Zirconia after Surface Alteration Utilising Two Different Techniques. J Clin Diagn Res 2017; 11:ZC20-ZC23. [PMID: 28969267 DOI: 10.7860/jcdr/2017/25177.10361] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 04/07/2017] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Chairside surface alteration like grinding is often done by clinicians for adjustment of zirconia restorations. To restore the surface of the prostheses, either polishing or glazing is done. However, there is a controversy which of the surface restoration technique helps regain strength of the restoration. AIM This study was conducted to evaluate the effects of chairside surface alteration on flexural strength of Monolithic zirconia. MATERIALS AND METHODS Rectangular zirconia samples (n=30) were prepared by CAD-CAM and divided into three groups. One was control group with no alteration (n=10), second was ground and polished (n=10) and third was ground and reglazed (n=10). Flexural strength testing was performed with a three-point bend test on a universal testing machine. The collected data was statistically analysed for normal distribution using D'Agostino and Pearson omnibus normality test, one-way ANOVA and Tukeys multiple comparison test (p<0.05). RESULTS The mean flexural strength of the reglazed group was significantly higher (648.7 MPa) as compared to the control (507 MPa) or the polished groups (588.5 MPa). CONCLUSION Statistically, reglazing increased the flexural strength as compared to polishing.
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Affiliation(s)
- Ketaki Janardhan Chougule
- Ex-Postgraduate Student, Department of Prosthodontics, Nair Hospital Dental College, Mumbai, Maharashtra, India
| | - Arti Prabodh Wadkar
- Dean and Professor and Head, Department of Prosthodontics, Nair Hospital Dental College, Mumbai, Maharashtra, India
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Roy M, Pompella A, Kubacki J, Piosik A, Psiuk B, Klimontko J, Szade J, Roy RA, Hedzelek W. Photofunctionalization of dental zirconia oxide: Surface modification to improve bio-integration preserving crystal stability. Colloids Surf B Biointerfaces 2017; 156:194-202. [PMID: 28531876 DOI: 10.1016/j.colsurfb.2017.05.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 05/09/2017] [Accepted: 05/10/2017] [Indexed: 10/19/2022]
Abstract
The use of zirconium oxide in dental implantology is rapidly increasing as it is regarded as being more aesthetical and biologically friendly than titanium oxide. The interaction of titanium oxide with cells and proteins has proven to be significantly affected by the inevitable atmospheric hydrocarbon contamination, defined as biological ageing. The latter has proven to be effectively reversed by UVC irradiation. Crystal structures of both Zr and Ti oxides are very similar, thus also ZrO2 is prone to contamination by hydrocarbons. In the present study we have characterized the chemical-physical changes occurring to ZrO2 after UVC irradiation. Firstly a reduction by 3-fold of carbon present on its surface. XRD analysis has indicated that UVC irradiation treatment does not affect the crystalline structure of ZrO2, suggesting that it is possible to improve cell attachment on the surface without sacrificing the mechanical strength of the material. In addition a chemical model of interaction of cell surface proteins with the almost carbon free ZrO2 surface obtainable after UVC irradiation is proposed, pointing to the important role likely played by integrins and RGD sequences originating in soluble proteins adsorbed at the cell/ZrO2 interface. Hence in clinical practice UVC photofunctionalization could improve the soft tissue seal around dental implants functioning as a valid barrier between implant and peri-implant bone, thereby improving the long-term success of implants.
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Affiliation(s)
- Marco Roy
- Prosthodontic Department, Poznan University of Medical Science, Ul. Bukowska 70, 60-812 Poznan, Poland.
| | - Alfonso Pompella
- Dept. of Translational Research and New Technologies in Medicine and Surgery, University of Pisa Medical School, Via Roma 55, 56126 Pisa, Italy
| | - Jerzy Kubacki
- A. Chelkowski Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500 Chorzów, Poland
| | - Adam Piosik
- Prosthodontic Department, Poznan University of Medical Science, Ul. Bukowska 70, 60-812 Poznan, Poland
| | - Bronisław Psiuk
- Refractory Materials Division,Institute of Ceramics and Building Materials, Toszecka 99, 44-100 Gliwice, Poland
| | - Joanna Klimontko
- A. Chelkowski Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500 Chorzów, Poland
| | - Jacek Szade
- A. Chelkowski Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500 Chorzów, Poland
| | | | - Wieslaw Hedzelek
- Prosthodontic Department, Poznan University of Medical Science, Ul. Bukowska 70, 60-812 Poznan, Poland
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Felemban NH, Ebrahim MI. The influence of adding modified zirconium oxide-titanium dioxide nano-particles on mechanical properties of orthodontic adhesive: an in vitro study. BMC Oral Health 2017; 17:43. [PMID: 28086858 PMCID: PMC5237344 DOI: 10.1186/s12903-017-0332-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2016] [Accepted: 01/06/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The purpose of this in-vitro study was to examine the effect of incorporating different concentrations of Zirconium oxide-Titanium dioxide (ZrO2-TiO2) nanoparticles, which can have antibacterial properties, on the mechanical properties of an orthodontic adhesive. METHODS ZrO2-TiO2 (Zirconium oxide, HWNANO, Hongwu International Group Ltd, China) -Titanium dioxide, Nanoshell, USA) nanopowder were incorporated into orthodontic adhesive (Transbond XT, 3 M Unitek, Monrovia, USA) with different concentrations (0.5% weight nonofiller and 1% weight nanofiller). The size of nanoparticle was 70-80 nm for ZrO2 and less than 50 nm for TiO2. For measuring the shear bond strength of the three groups of orthodontic adhesives [Transbond (control), Transbond mixed with 0.5% weight ZrO2-TiO2, and Transbond mixed with 1% weight ZrO2-TiO2], 30 freshly extracted human first premolars were used and bonded with stainless steel metal brackets (Dentaurum®, Discovery®, Deutschland), using the 3 orthodontic adhesives and 3 M Unitek; Transbond TM Plus Self-Etching Primer (10 samples in each group). The recorded values of compressive strength and tensile strength (measured separately on 10 samples of orthodontic adhesives (add the 3 D size of sample, light cured for 40 s on both sides) of each orthodontic adhesives), as well as the shear bond strength in Mega Pascal unit (MPa) were collected and exposed to one-way analysis of variance (ANOVA) and Tukey's post-hoc tests. RESULTS orthodontic adhesive with 1% weight ZrO2-TiO2 showed the highest mean compressive (73.42 ± 1.55 MPa, p: 0.003, F: 12.74), tensile strength (8.65 ± 0.74 MPa, p: 0.001, F: 68.20), and shear bond strength (20.05 ± 0.2 MPa, p: 0.001, F: 0.17). CONCLUSIONS Adding ZrO2-TiO2 nanoparticle to orthodontic adhesive increased compressive strength, tensile strength, and shear bond strength in vitro, but in vivo studies and randomized clinical trials are needed to validate the present findings.
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Affiliation(s)
- Nayef H Felemban
- Orthodontic department, Faculty of Dentistry, Taif University, Taif, Saudi Arabia. .,, P.O.B. 4302, Makkah, 21955, Saudi Arabia.
| | - Mohamed I Ebrahim
- Restorative dentistry department, Faculty of Dentistry, Taif University, Taif, Saudi Arabia
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Atash R, Boularbah MR, Sibel C. Color variation induced by abutments in the superior anterior maxilla: an in vitro study in the pig gingiva. J Adv Prosthodont 2016; 8:423-432. [PMID: 28018559 PMCID: PMC5179480 DOI: 10.4047/jap.2016.8.6.423] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 07/22/2016] [Accepted: 10/14/2016] [Indexed: 12/24/2022] Open
Abstract
PURPOSE The aim of this work is to evaluate different types of materials used for making implant abutments, by means of an in vitro study and a review of the literature, in order to identify the indications for a better choice of an implant-supported restoration in the anterior section. MATERIALS AND METHODS 5 implant abutments were tested in a random order in the superior anterior maxilla of pig gingiva (n = 8): titanium dioxide (Nobel Biocare); zirconium dioxide, Standard BO shade (Nobel Biocare, Kloten, Switzerland); zirconium dioxide, Light BI shade (Nobel Biocare); zirconium dioxide, Intense A 3.5 shade (Nobel Biocare); and aluminium oxide. Each abutment was tested for 2 mm and 3 mm thickness. To determine color variation, VITA Easyshade Advance spectrophotometer (Vita Zahnfabrik, Bad Sackingen, Germany) was used. RESULTS Results showed that the color variation induced by the abutment would be affected by the abutment material and gingival thickness, when the gingival thickness is 2 mm. All materials except zirconium dioxide (Standard shade) caused a visible change of color. Then, as the thickness of the gingiva increased to 3 mm, the color variation was attenuated in a significant manner and became invisible for all types of abutments, except those made of aluminium oxide. CONCLUSION Zirconium dioxide is the material causing the lowest color variation at 2 mm and at 3 mm, whereas aluminium oxide causes the highest color variation no matter the thickness.
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Affiliation(s)
- Ramin Atash
- Department of Stomatology and Dentistry, Erasmus Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Mohamed-Reda Boularbah
- Department of Stomatology and Dentistry, Erasmus Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Cetik Sibel
- Department of Stomatology and Dentistry, Erasmus Hospital, Université Libre de Bruxelles, Brussels, Belgium.; Laboratory of Physiology and Pharmaceutics, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
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Bhowmick A, Pramanik N, Jana P, Mitra T, Gnanamani A, Das M, Kundu PP. Development of bone-like zirconium oxide nanoceramic modified chitosan based porous nanocomposites for biomedical application. Int J Biol Macromol 2016; 95:348-356. [PMID: 27865958 DOI: 10.1016/j.ijbiomac.2016.11.052] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 11/10/2016] [Accepted: 11/13/2016] [Indexed: 11/25/2022]
Abstract
Here, zirconium oxide nanoparticles (ZrO2 NPs) were incorporated for the first time in organic-inorganic hybrid composites containing chitosan, poly(ethylene glycol) and nano-hydroxypatite (CS-PEG-HA) to develop bone-like nanocomposites for bone tissue engineering application. These nanocomposites were characterized by FT-IR, XRD, TEM combined with SAED. SEM images and porosity measurements revealed highly porous structure having pore size of less than 1μm to 10μm. Enhanced water absorption capacity and mechanical strengths were obtained compared to previously reported CS-PEG-HA composite after addition of 0.1-0.3wt% of ZrO2 NPs into these nanocomposites. The mechanical strengths and porosities were similar to that of human spongy bone. Strong antimicrobial effects against gram-negative and gram-positive bacterial strains were also observed. Along with getting low alkalinity pH (7.4) values, similar to the pH of human plasma, hemocompatibility and cytocompatibility with osteoblastic MG-63 cells were also established for these nanocomposites. Addition of 15wt% HA-ZrO2 (having 0.3wt% ZrO2 NPs) into CS-PEG (55:30wt%) composite resulted in greatest mechanical strength, porosity, antimicrobial property and cytocompatibility along with suitable water absorption capacity and compatibility with human pH and blood. Thus, this nanocomposite could serve as a potential candidate to be used for bone tissue engineering.
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Affiliation(s)
- Arundhati Bhowmick
- Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata, 700009, India
| | - Nilkamal Pramanik
- Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata, 700009, India
| | - Piyali Jana
- Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata, 700009, India
| | - Tapas Mitra
- Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata, 700009, India
| | - Arumugam Gnanamani
- Microbiology Division, CSIR-Central Leather Research Institute, Adyar, Chennai, 600020, Tamil Nadu, India
| | - Manas Das
- Department of Chemical Engineering, University of Calcutta, 92 A.P.C. Road, Kolkata, 700009, India
| | - Patit Paban Kundu
- Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata, 700009, India; Department of Chemical Engineering, Indian Institute of Technology, Roorkee, 247667, India.
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Kwon OH, Kim JO, Cho DW, Kumar R, Baek SH, Kurade MB, Jeon BH. Adsorption of As(III), As(V) and Cu(II) on zirconium oxide immobilized alginate beads in aqueous phase. Chemosphere 2016; 160:126-133. [PMID: 27372261 DOI: 10.1016/j.chemosphere.2016.06.074] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 05/23/2016] [Accepted: 06/20/2016] [Indexed: 06/06/2023]
Abstract
A composite adsorbent to remove arsenite [As(III)], arsenate [As(V)], and copper [Cu(II)] from aqueous phase was synthesized by immobilizing zirconium oxide on alginate beads (ZOAB). The composition (wt%) of ZOAB (Zr-34.0; O-32.7; C-21.3; Ca-1.0) was confirmed by energy dispersive X-ray (EDX) analysis. Sorption studies were conducted on single and binary sorbate systems, and the effects of contact time, initial adsorbate concentration, and pH on the adsorption performance of ZOAB (pHPZC = 4.3) were monitored. The sorption process for As(III)/As(V) and Cu(II) reached an equilibrium state within 240 h and 24 h, respectively, with maximum sorption capacities of 32.3, 28.5, and 69.9 mg g(-1), respectively. The addition of Cu(II) was favorable for As(V) sorption in contrast to As(III). In the presence of 48.6 mg L(-1) Cu(II), the sorption capacity of As(V) increased from 1.5 to 3.8 mg g(-1) after 240 h. The sorption data for As(III)/As(V) and Cu(II) conformed the Freundlich and Langmuir isotherm models, respectively. The adsorption of As(III), As(V), and Cu(II) followed pseudo second order kinetics. The effect of arsenic species on Cu(II) sorption was insignificant. The results of present study demonstrated that the synthesized sorbent could be useful for the simultaneous removal of both anionic and cationic contaminants from wastewaters.
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Affiliation(s)
- Oh-Hun Kwon
- Department of Natural Resources and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, South Korea
| | - Jong-Oh Kim
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, South Korea.
| | - Dong-Wan Cho
- Department of Energy and Environment, Sejong University, Seoul 143-747, South Korea
| | - Rahul Kumar
- Department of Natural Resources and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, South Korea
| | - Seung Han Baek
- Mine Reclamation Corporation, Coal Center, 2 Segye-ro, Wonju, Gangwon-do 16464, South Korea
| | - Mayur B Kurade
- Department of Natural Resources and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, South Korea
| | - Byong-Hun Jeon
- Department of Natural Resources and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, South Korea.
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Govindaraju L, Neelakantan P, Gutmann JL. Effect of root canal irrigating solutions on the compressive strength of tricalcium silicate cements. Clin Oral Investig 2016; 21:567-571. [PMID: 27469101 DOI: 10.1007/s00784-016-1922-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 07/20/2016] [Indexed: 10/21/2022]
Abstract
OBJECTIVES The aim of this study was to evaluate the effect of root canal irrigants on the compressive strength of hydraulic tricalcium silicate cements. MATERIALS AND METHODS Specimens (n = 60) of tricalcium silicate materials-Group 1: White ProRoot mineral trioxide aggregate (MTA), Group 2: NeoMTA Plus, Group 3: White MTA Angelus, and Group 4: Biodentine were exposed to one of the solutions (n = 20): Phosphate buffered saline (PBS; control), 3 % NaOCl, or 17 % EDTA for 5 min while being suspended in PBS. Compressive strength values were evaluated after 7 days of storage. The data were statistically analyzed by two-way ANOVA and Tukey's multiple comparison test (P = 0.05). RESULTS Biodentine (BD) showed significantly higher compressive strength than the other materials (P < 0.05) in the control group. When exposed to NaOCl, compressive strength of WMTA and WMTA-A decreased significantly (P < 0.05), while EDTA decreased the compressive strength of all the cements compared to the control (P < 0.05). There was no significant difference in the compressive strength of BD and NMTA-P when exposed to NaOCl or EDTA. CONCLUSIONS Biodentine and NeoMTA Plus did not show a significant reduction in compressive strength when exposed to NaOCl. EDTA reduced the compressive strength of the cements tested. CLINICAL SIGNIFICANCE Tricalcium silicates were differentially influenced by root canal irrigants. It is essential to understand the composition of these materials prior to clinical use. Traces of irrigants from the root canal wall must be thoroughly removed.
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Affiliation(s)
- Lokhasudhan Govindaraju
- Department of Conservative Dentistry and Endodontics, Saveetha Dental College and Hospitals, Saveetha University, Chennai, India
| | - Prasanna Neelakantan
- Department of Conservative Dentistry and Endodontics, Saveetha Dental College and Hospitals, Saveetha University, Plot 1500, 16th Main Road, Anna Nagar West, Chennai, Tamil Nadu, India.
| | - James L Gutmann
- Texas A&M University Baylor College of Dentistry, Dallas, TX, USA
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Li X, Yoshihara K, De Munck J, Cokic S, Pongprueksa P, Putzeys E, Pedano M, Chen Z, Van Landuyt K, Van Meerbeek B. Modified tricalcium silicate cement formulations with added zirconium oxide. Clin Oral Investig 2016; 21:895-905. [PMID: 27153848 DOI: 10.1007/s00784-016-1843-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 04/25/2016] [Indexed: 11/25/2022]
Abstract
OBJECTIVES This study aims to investigate the effect of modifying tricalcium silicate (TCS) cements on three key properties by adding ZrO2. MATERIALS AND METHODS TCS powders were prepared by adding ZrO2 at six different concentrations. The powders were mixed with 1 M CaCl2 solution at a 3:1 weight ratio. Biodentine (contains 5 wt.% ZrO2) served as control. To evaluate the potential effect on mechanical properties, the mini-fracture toughness (mini-FT) was measured. Regarding bioactivity, Ca release was assessed using ICP-AES. The component distribution within the cement matrix was evaluated by Feg-SEM/EPMA. Cytotoxicity was assessed using an XTT assay. RESULTS Adding ZrO2 to TCS did not alter the mini-FT (p = 0.52), which remained in range of that of Biodentine (p = 0.31). Ca release from TSC cements was slightly lower than that from Biodentine at 1 day (p > 0.05). After 1 week, Ca release from TCS 30 and TCS 50 increased to a level that was significantly higher than that from Biodentine (p < 0.05). After 1 month, Ca release all decreased (p < 0.05), yet TCS 0 and TCS 50 released comparable amounts of Ca as at 1 day (p > 0.05). EPMA revealed a more even distribution of ZrO2 within the TCS cements. Particles with an un-reacted core were surrounded by a hydration zone. The 24-, 48-, and 72-h extracts of TCS 50 were the least cytotoxic. CONCLUSIONS ZrO2 can be added to TCS without affecting the mini-FT; Ca release was reduced initially, to reach a prolonged release thereafter; adding ZrO2 made TCS cements more biocompatible. CLINICAL RELEVANCE TCS 50 is a promising cement formulation to serve as a biocompatible hydraulic calcium silicate cement.
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Affiliation(s)
- Xin Li
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT & University Hospitals Leuven, Dentistry, Kapucijnenvoer 7, blok A-box 7001, 3000, Leuven, Belgium
- Wuhan University, School and Hospital of Stomatology, The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, Wuhan, People's Republic of China
| | - Kumiko Yoshihara
- Okayama University Hospital, Center for Innovative Clinical Medicine, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Jan De Munck
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT & University Hospitals Leuven, Dentistry, Kapucijnenvoer 7, blok A-box 7001, 3000, Leuven, Belgium
| | - Stevan Cokic
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT & University Hospitals Leuven, Dentistry, Kapucijnenvoer 7, blok A-box 7001, 3000, Leuven, Belgium
| | - Pong Pongprueksa
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT & University Hospitals Leuven, Dentistry, Kapucijnenvoer 7, blok A-box 7001, 3000, Leuven, Belgium
| | - Eveline Putzeys
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT & University Hospitals Leuven, Dentistry, Kapucijnenvoer 7, blok A-box 7001, 3000, Leuven, Belgium
| | - Mariano Pedano
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT & University Hospitals Leuven, Dentistry, Kapucijnenvoer 7, blok A-box 7001, 3000, Leuven, Belgium
| | - Zhi Chen
- Wuhan University, School and Hospital of Stomatology, The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, Wuhan, People's Republic of China
| | - Kirsten Van Landuyt
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT & University Hospitals Leuven, Dentistry, Kapucijnenvoer 7, blok A-box 7001, 3000, Leuven, Belgium
| | - Bart Van Meerbeek
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT & University Hospitals Leuven, Dentistry, Kapucijnenvoer 7, blok A-box 7001, 3000, Leuven, Belgium.
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Tiwari S, Kenchappa M, Bhayya D, Gupta S, Saxena S, Satyarth S, Singh A, Gupta M. Antibacterial Activity and Fluoride Release of Glass-Ionomer Cement, Compomer and Zirconia Reinforced Glass-Ionomer Cement. J Clin Diagn Res 2016; 10:ZC90-3. [PMID: 27190961 PMCID: PMC4866259 DOI: 10.7860/jcdr/2016/16282.7676] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2015] [Accepted: 01/18/2016] [Indexed: 11/24/2022]
Abstract
INTRODUCTION The cariostatic property of glass ionomer cement (GIC) stems from its ability to release fluoride into the oral environment. Recently, zirconia reinforced GIC has been launched which promises the protective benefits of glass ionomer while completely eliminating the hazard of mercury. AIM To evaluate invitro antibacterial activity and fluoride release from two conventional glass ionomer cements (GC II and GC IX), compomer (Compoglass) and a zirconia reinforced glass ionomer cement (Zirconomer). MATERIALS AND METHODS The antibacterial activity of the cement specimens was evaluated against Streptococcus mutans using the agar inhibition test. Zone of inhibition on Mueller-Hinton agar plates was measured after 48 hours. The fluoride release from the cement specimens in ppm were measured at day 1, 7, 14 and 21 using a fluoride ion selective electrode. Data was analysed using one-way and two-way analysis of variance (ANOVA) followed by LSD post-hoc test. A p-value <0.05 was considered statistically significant. RESULTS Statistically significant largest zone of inhibition was observed with Zirconomer. Also, significant differences were seen in fluoride release of different materials. At all the time intervals maximum fluoride release was observed with Zirconomer and minimum with Compoglass. CONCLUSION This invitro investigation has revealed that zirconia reinforced GIC (Zirconomer) had maximum antibacterial activity against S.mutans and fluoride release.
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Affiliation(s)
- Sonia Tiwari
- Post Graduate Student, Department of Pedodontics and Preventive Dentistry, Hitkarini Dental College and Hospital, Jabalpur, Madhya Pradesh, India
| | - Mallikarjuna Kenchappa
- Professor, Department of Pedodontics and Preventive Dentistry, College of Dental Sciences, Davangere, Karnataka, India
| | - Deepak Bhayya
- Professor and Head, Department of Pedodontics and Preventive Dentistry, Hitkarini Dental College and Hospital, Jabalpur, Madhya Pradesh, India
| | - Shilpi Gupta
- Reader, Department of Pedodontics and Preventive Dentistry, Hitkarini Dental College and Hospital, Jabalpur, Madhya Pradesh, India
| | - Sudhanshu Saxena
- Reader, Department of Public Health Dentistry, Hitkarini Dental College and Hospital, Jabalpur, Madhya Pradesh, India
| | - Saurabh Satyarth
- Post Graduate Student, Department of Pedodontics and Preventive Dentistry, Hitkarini Dental College and Hospital, Jabalpur, Madhya Pradesh, India
| | - Aishwarya Singh
- Senior lecturer, Department of Public Health Dentistry, People’s College of Dental Sciences & Research Center, Bhopal, Madhya Pradesh, India
| | - Manoj Gupta
- Post Graduate Student, Department of Public Health Dentistry, People’s College of Dental Sciences & Research Center, Bhopal, Madhya Pradesh, India
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Schwindling FS, Stober T, Rustemeier R, Schmitter M, Rues S. Retention behavior of double-crown attachments with zirconia primary and secondary crowns. Dent Mater 2016; 32:695-702. [PMID: 27020527 DOI: 10.1016/j.dental.2016.03.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Revised: 09/14/2015] [Accepted: 03/08/2016] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To investigate whether adequate retention of zirconia conical crown (CC) attachments can be achieved, and to investigate their long-term retention. METHODS Sixteen individual zirconia primary crowns were produced with convergence angles of 1° or 2° (eight of each). After determination of the convergence angles of the primary crowns, monolithic zirconia secondary crowns were manufactured. To evaluate the retention behavior of all-zirconia CC, the crowns were fitted with forces from F=12.5-100 N. Force magnitudes during the loosening process (L) were then measured. L/F ratios were recorded and the coefficient of friction (μ0) was calculated. Long-term retention was tested with up to 50,000 cycles of denture integration at a speed of 30 mms(-1) and a fitting force magnitude of 53 N. RESULTS Even when primary crowns were manufactured with the utmost care, the real convergence angles were greater than the nominal angles of the standardized burs (1° and 2°) by 0.28° (SD 0.11°). Without mechanical aging, mean L/F was 0.632 (SD 0.038) for 1° samples and 0.526 (SD 0.022) for 2° samples, indicative of high retentive forces of up to 63.2% of the fitting forces. When all the test results were used, best-fitting curves gave μ0=0.117 for new samples and μ0=0.126 for samples after 50,000 integration cycles. SIGNIFICANCE When the correct milling and sintering parameters are chosen, the retention behavior of zirconia CCs is adequate and stable. This innovative type of attachment is appealing because of the beneficial properties of zirconia and the efficient CAD/CAM-based manufacture.
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Liu ZW, Li WQ, Wang JK, Ma XC, Liang C, Liu P, Chu Z, Dang YH. Zirconium oxide ceramic foam: a promising supporting biomaterial for massive production of glial cell line-derived neurotrophic factor. J Zhejiang Univ Sci B 2015; 15:1013-22. [PMID: 25471830 DOI: 10.1631/jzus.b1400163] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This study investigated the potential application of a zirconium oxide (ZrO2) ceramic foam culturing system to the production of glial cell line-derived neurotrophic factor (GDNF). Three sets of ZrO2 ceramic foams with different pore densities of 10, 20, and 30 pores per linear inch (PPI) were prepared to support a 3D culturing system. After primary astrocytes were cultured in these systems, production yields of GDNF were evaluated. The biomaterial biocompatibility, cell proliferation and activation of cellular signaling pathways in GDNF synthesis and secretion in the culturing systems were also assessed and compared with a conventional culturing system. In this study, we found that the ZrO2 ceramic foam culturing system was biocompatible, using which the GDNF yields were elevated and sustained by stimulated cell proliferation and activation of signaling pathways in astrocytes cultured in the system. In conclusion, the ZrO2 ceramic foam is promising for the development of a GDNF mass production device for Parkinson's disease treatment.
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Affiliation(s)
- Zhong-wei Liu
- Department of Cardiology, the Third Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710068, China; School of Astronautics, Northwestern Polytechnic University, Xi'an 710072, China; Department of Psychiatry, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China; Department of Neurosurgery, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China; College of Medicine & Forensics, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China; Key Laboratory of the Health Ministry for Forensic Medicine, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, China; MOE Key Laboratory of Environment and Genes Related to Diseases, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, China
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Almaguer-Flores A, Silva-Bermudez P, Galicia R, Rodil SE. Bacterial adhesion on amorphous and crystalline metal oxide coatings. Mater Sci Eng C Mater Biol Appl 2015; 57:88-99. [PMID: 26354243 DOI: 10.1016/j.msec.2015.07.031] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 05/10/2015] [Accepted: 07/10/2015] [Indexed: 12/15/2022]
Abstract
Several studies have demonstrated the influence of surface properties (surface energy, composition and topography) of biocompatible materials on the adhesion of cells/bacteria on solid substrates; however, few have provided information about the effect of the atomic arrangement or crystallinity. Using magnetron sputtering deposition, we produced amorphous and crystalline TiO2 and ZrO2 coatings with controlled micro and nanoscale morphology. The effect of the structure on the physical-chemical surface properties was carefully analyzed. Then, we studied how these parameters affect the adhesion of Escherichia coli and Staphylococcus aureus. Our findings demonstrated that the nano-topography and the surface energy were significantly influenced by the coating structure. Bacterial adhesion at micro-rough (2.6 μm) surfaces was independent of the surface composition and structure, contrary to the observation in sub-micron (0.5 μm) rough surfaces, where the crystalline oxides (TiO2>ZrO2) surfaces exhibited higher numbers of attached bacteria. Particularly, crystalline TiO2, which presented a predominant acidic nature, was more attractive for the adhesion of the negatively charged bacteria. The information provided by this study, where surface modifications are introduced by means of the deposition of amorphous or crystalline oxide coatings, offers a route for the rational design of implant surfaces to control or inhibit bacterial adhesion.
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Affiliation(s)
- Argelia Almaguer-Flores
- Facultad de Odontología, División de Estudios de Posgrado e Investigación, Universidad Nacional Autónoma de México, Circuito exterior s/n, Ciudad Universitaria, 04510 México D.F., Mexico
| | - Phaedra Silva-Bermudez
- Unidad de Ingeniería de Tejidos, Terapia Celular y Medicina Regenerativa, Instituto Nacional de Rehabilitación, Calzada México-Xochimilco No. 289, Col. Arenal de Guadalupe, 14389 México D.F., Mexico; Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, 04510 México D.F., Mexico.
| | - Rey Galicia
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, 04510 México D.F., Mexico
| | - Sandra E Rodil
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, 04510 México D.F., Mexico
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Nejatidanesh F, Moradpoor H, Savabi O. Clinical outcomes of zirconia-based implant- and tooth-supported single crowns. Clin Oral Investig 2016; 20:169-78. [PMID: 25910472 DOI: 10.1007/s00784-015-1479-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Accepted: 04/13/2015] [Indexed: 10/23/2022]
Abstract
OBJECTIVES Zirconia-based restorations have been increasingly used on implant and teeth abutments, but the evidence about clinical outcomes of these restorations is limited. The aim of this study was to assess up to 7-year clinical outcomes of implant- and tooth-supported zirconia-based single crowns. MATERIALS AND METHODS In this retrospective study, 261 patients with 556 single crowns supported by either teeth (324) or implants (232) were examined during 3- to 7-year follow-up (mean observation of 60.70 months for tooth and 59.20 months for implant-supported crowns). California Dental Association (CDA) quality evaluation system was used to evaluate the restorations. Soft tissue status was assessed using plaque and gingival index scores, bleeding on probing, and pocket depth. Patient and professional satisfaction were evaluated by visual analog scale (VAS). RESULTS The 5-year Kaplan-Meier survival probability was 98.3 and 97.3 for implant- and tooth-supported crowns, respectively. In regard to CDA rating, most of the crowns were ranked as either excellent or acceptable (99.5 %). The recorded failures were replacement of the crown due to porcelain chipping (3), implant failure (1), and teeth extraction (5). Soft tissue parameters were not affected by the restorations compare to control teeth. The VAS was high for both patients and clinicians. CONCLUSIONS Zirconia-based single crowns on both tooth and implant abutments showed promising clinical performance in this up to 7-year follow-up. CLINICAL RELEVANCE The zirconia-based single crowns can be used clinically for tooth- and implant-supported restorations.
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Kurtulmus-Yilmaz S, Ulusoy M. Comparison of the translucency of shaded zirconia all-ceramic systems. J Adv Prosthodont 2014; 6:415-22. [PMID: 25352964 PMCID: PMC4211058 DOI: 10.4047/jap.2014.6.5.415] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 05/26/2014] [Accepted: 06/09/2014] [Indexed: 12/31/2022] Open
Abstract
PURPOSE The purpose of this study was to evaluate and compare the translucency of shaded zirconia all-ceramic systems. MATERIALS AND METHODS Translucency of 3 different zirconia all-ceramic systems colored by different techniques was compared with a lithium disilicate glass-ceramic (IPS e.max Press). Square-shaped specimens with 0.5 mm thickness were fabricated from In-Ceram YZ, ICE Zirkon and Katana systems in A1, A2 and A3.5 shades according to Vitapan Classical shade tab (n=11). Specimens were then veneered and glazed with corresponding veneer ceramic recommended by each zirconia system manufacturer and the total thickness was set to 1.5 mm. Translucency measurements were performed with VITA Easyshade Compact spectrophotometer after each stage and translucency parameter was calculated. Data were statistically analyzed with repeated measures ANOVA and Tukey multiple comparison test. RESULTS The control group was significantly more translucent than the zirconia systems (P<.05). ICE Zirkon cores showed the least translucency; neither In-Ceram YZ nor Katana systems were superior to each other in terms of translucency. Translucency of all specimens was decreased after veneering, and the translucency rankings were changed. CONCLUSION Coloring technique did not have a significant effect on translucency of zirconia cores. Although zirconia systems were less translucent than lithium disilicate glass ceramic, they had partial translucency and there were translucency differences among the zirconia systems. Chroma affected the translucency of precolored zirconia cores.
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Affiliation(s)
| | - Mutahhar Ulusoy
- Department of Prosthodontics, Faculty of Dentistry, Near East University, Mersin10, Turkey
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Kasraei S, Rezaei-Soufi L, Heidari B, Vafaee F. Bond strength of resin cement to CO2 and Er:YAG laser-treated zirconia ceramic. Restor Dent Endod 2014; 39:296-302. [PMID: 25383349 PMCID: PMC4223100 DOI: 10.5395/rde.2014.39.4.296] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2014] [Accepted: 07/18/2014] [Indexed: 02/08/2023] Open
Abstract
Objectives It is difficult to achieve adhesion between resin cement and zirconia ceramics using routine surface preparation methods. The aim of this study was to evaluate the effects of CO2 and Er:YAG laser treatment on the bond strength of resin cement to zirconia ceramics. Materials and Methods In this in-vitro study 45 zirconia disks (6 mm in diameter and 2 mm in thickness) were assigned to 3 groups (n = 15). In control group (CNT) no laser treatment was used. In groups COL and EYL, CO2 and Er:YAG lasers were used for pretreatment of zirconia surface, respectively. Composite resin disks were cemented on zirconia disk using dual-curing resin cement. Shear bond strength tests were performed at a crosshead speed of 0.5 mm/min after 24 hr distilled water storage. Data were analyzed by one-way ANOVA and post hoc Tukey's HSD tests. Results The means and standard deviations of shear bond strength values in the EYL, COL and CNT groups were 8.65 ± 1.75, 12.12 ± 3.02, and 5.97 ± 1.14 MPa, respectively. Data showed that application of CO2 and Er:YAG lasers resulted in a significant higher shear bond strength of resin cement to zirconia ceramics (p < 0.0001). The highest bond strength was recorded in the COL group (p < 0.0001). In the CNT group all the failures were adhesive. However, in the laser groups, 80% of the failures were of the adhesive type. Conclusions Pretreatment of zirconia ceramic via CO2 and Er:YAG laser improves the bond strength of resin cement to zirconia ceramic, with higher bond strength values in the CO2 laser treated samples.
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Affiliation(s)
- Shahin Kasraei
- Dental Research Center, Department of Restorative Dentistry, Dental School, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Loghman Rezaei-Soufi
- Dental Research Center, Department of Restorative Dentistry, Dental School, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Bijan Heidari
- Department of Prosthodontic, Dental School, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Fariborz Vafaee
- Department of Prosthodontic, Dental School, Hamadan University of Medical Sciences, Hamadan, Iran
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Han SH, Kim KH, Han JS, Koo KT, Kim TI, Seol YJ, Lee YM, Ku Y, Rhyu IC. Response of osteoblast-like cells cultured on zirconia to bone morphogenetic protein-2. J Periodontal Implant Sci 2011; 41:227-33. [PMID: 22087413 PMCID: PMC3213233 DOI: 10.5051/jpis.2011.41.5.227] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2011] [Accepted: 08/28/2011] [Indexed: 11/25/2022] Open
Abstract
Purpose The aim of this study was to compare osteoblast behavior on zirconia and titanium under conditions cultured with bone morphogenetic protein-2. Methods MC3T3-E1 cells were cultured on sandblasted zirconia and sandblasted/etched titanium discs. At 24 hours after seeding MC3T3-E1, the demineralized bone matrix (DBM) gel alone and the DBM gel with bone morphogenetic protein-2 (BMP-2) were added to the culture medium. The surface topography was examined by confocal laser scanning microscopy. Cellular proliferation was measured at 1, 4, and 7 days after gel loading. Alkaline phosphatase activity was measured at 7 days after gel loading. The mRNA expression of ALPase, bone sialoprotein, type I collagen, runt-related transcription factor 2 (Runx-2), osteocalcin, and osterix were evaluated by real-time polymerase chain reaction at 4 days and 7 days. Results At 1, 4, and 7 days after loading the DBM gel alone and the DBM gel with BMP-2, cellular proliferation on the zirconia and titanium discs was similar and that of the groups cultured with the DBM gel alone and the DBM gel with BMP-2 was not significantly different, except for titanium with BMP-2 gel. ALPase activity was higher in the cells cultured with BMP-2 than in the other groups, but there was no difference between the zirconia and titanium. In ALPase, bone sialoprotein, osteocalcin, Runx-2 and osterix gene expression, that of cells on zirconia or titanium with BMP-2 gel was much more highly increased than titanium without gel at day 7. The gene expression level of cells cultured on zirconia with BMP-2 was higher than that on titanium with BMP-2 at day 7. Conclusions The data in this study demonstrate that the osteoblastic cell attachment and proliferation of zirconia were comparable to those of titanium. With the stimulation of BMP-2, zirconia has a more pronounced effect on the proliferation and differentiation of the osteoblastic cells compared with titanium.
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Affiliation(s)
- Seung-Hee Han
- Department of Periodontology, Seoul National University School of Dentistry, Seoul, Korea
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Yondem I, Altintas SH, Usumez A. Temperature Rise during Resin Composite Polymerization under Different Ceramic Restorations. Eur J Dent 2011; 5:305-9. [PMID: 21769272 PMCID: PMC3137444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
OBJECTIVES The purpose of this study was to measure temperature increase induced by various light polymerizing units during resin composite polymerization beneath one of three types of ceramic restorations. METHODS The resin composite (Variolink II) was polymerized between one of three different ceramic specimens (zirconium oxide, lithium disilicate, feldspathic) (diameter 5 mm, height 2 mm) and a dentin disc (diameter 5 mm, height 1 mm) with a conventional halogen light, a high intensity halogen light, or an LED unit. The temperature rise was measured under the dentin disc with a J-type thermocouple wire connected to a data logger. Ten measurements were carried out for each group. The difference between the initial and highest temperature readings was taken and the 10 calculated temperature changes were averaged to determine the mean value in temperature rise. Two way analysis of variance (ANOVA) was used to analyze the data (polymerizing unit, ceramic brand) for significant differences. The Tukey HSD test was used to perform multiple comparisons (α=.05). RESULTS Temperature rise did not vary significantly depending on the light polymerizing unit used (P=.16), however, the type of ceramic system showed a significant effect on temperature increases (P<.01). There were no statistically significant differences between lithium disilicate and feldspathic ceramic systems (P >.05); in comparison, the resin composite polymerized under the zirconium oxide ceramic system induced a significantly lower temperature increase than the other ceramic systems tested (P<.05) CONCLUSIONS The resin composite polymerized beneath zirconium oxide ceramic system induced significantly smaller temperature changes. The maximal temperature increase detected in all groups in this study was not viewed as critical for pulpal health.
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Affiliation(s)
- Isa Yondem
- Assist. Professor, Department of Prosthodontics, Faculty of Dentistry, Selcuk University, Konya, Turkey,Corresponding author: Dr. Isa Yondem, Selcuk University, Faculty of Dentistry, Department of Prosthodontics Selcuklu 42079, Campus, Konya, Turkey. Phone: +90 332 2410041/1190, Fax: +90 332 2410062, E-mail:
| | - Subutay Han Altintas
- Assist. Professor, Department of Prosthodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey
| | - Aslihan Usumez
- Professor, Department of Prosthodontics, Faculty of Dentistry, Gaziantep University, Gaziantep, Turkey
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