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Bizo L, Mureşan-Pop M, Barabás R, Barbu-Tudoran L, Berar A. In Vitro Degradation of Mg-Doped ZrO 2 Bioceramics at the Interface with Xerostom ® Saliva Substitute Gel. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2680. [PMID: 37048973 PMCID: PMC10096315 DOI: 10.3390/ma16072680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 03/19/2023] [Accepted: 03/27/2023] [Indexed: 06/19/2023]
Abstract
Zirconia-based bioceramics, one of the most important materials used for dental applications, have been intensively studied in recent years due to their excellent mechanical resistance and chemical inertness in the mouth. In this work, the structural, morphological and dissolution properties of the Zr1-xMgxO2 (x = 0.05, 0.1, 0.15, 0.2, 0.25, and 0.3) system, prepared by the conventional ceramic method, were evaluated before and after immersion in saliva substitute gel (Xerostom®, Biocosmetics Laboratories, Madrid, Spain), one of the most common topical dry mouth products used in dentistry. The X-ray powder diffraction (XRPD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS) techniques were employed to investigate the phase transformations and morphology of the ceramics during the degradation process in Xerostom®. In vitro analyses showed overall good stability in the Xerostom® environment, except for the x = 0.05 composition, where significant t- to m-ZrO2 transformation occurred. In addition, the strong interconnection of the grains was maintained after immersion, which could allow a high mechanical strength of the ceramics to be obtained.
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Affiliation(s)
- Liliana Bizo
- Department of Chemical Engineering, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, 11 Arany Janos Str., RO-400028 Cluj-Napoca, Romania
- Nanostructured Materials and Bio-Nano-Interfaces Center, Institute for Interdisciplinary Research on Bio-Nano-Sciences, Babeş-Bolyai University, 42 Treboniu Laurian Str., RO-400271 Cluj-Napoca, Romania;
| | - Marieta Mureşan-Pop
- Nanostructured Materials and Bio-Nano-Interfaces Center, Institute for Interdisciplinary Research on Bio-Nano-Sciences, Babeş-Bolyai University, 42 Treboniu Laurian Str., RO-400271 Cluj-Napoca, Romania;
| | - Réka Barabás
- Department of Chemistry and Chemical Engineering of Hungarian Line of Study, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, 11 Arany Janos Str., RO-400028 Cluj-Napoca, Romania;
| | - Lucian Barbu-Tudoran
- Electron Microscopy Center “Prof. C. Craciun”, Faculty of Biology and Geology, Babeș-Bolyai University, 5-7 Clinicilor Str., RO-400006 Cluj-Napoca, Romania;
- Electron Microscopy Integrated Laboratory, National Institute for R&D of Isotopic and Molecular Technologies, 67-103 Donath Str., RO-400293 Cluj-Napoca, Romania
| | - Antonela Berar
- Department of Prosthetic Dentistry, Faculty of Dental Medicine, Iuliu Haţieganu University of Medicine and Pharmacy, 32 Clinicilor Str., RO-400006 Cluj-Napoca, Romania;
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Tchinda A, Chézeau L, Pierson G, Kouitat-Njiwa R, Rihn BH, Bravetti P. Biocompatibility of ZrO2 vs. Y-TZP Alloys: Influence of Their Composition and Surface Topography. MATERIALS 2022; 15:ma15134655. [PMID: 35806779 PMCID: PMC9267226 DOI: 10.3390/ma15134655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 06/21/2022] [Accepted: 06/29/2022] [Indexed: 12/04/2022]
Abstract
The osseointegration of implants is defined as the direct anatomical and functional connection between neoformed living bone and the surface of a supporting implant. The biological compatibility of implants depends on various parameters, such as the nature of the material, chemical composition, surface topography, chemistry and loading, surface treatment, and physical and mechanical properties. In this context, the objective of this study is to evaluate the biocompatibility of rough (Ra = 1 µm) and smooth (Ra = 0 µm) surface conditions of yttria–zirconia (Y-TZP) discs compared to pure zirconia (ZrO2) discs by combining a classical toxicological test, morphological observations by SEM, and a transcriptomic analysis on an in vitro model of human Saos-2 bone cells. Similar cell proliferation rates were observed between ZrO2 and Y-TZP discs and control cells, regardless of the surface topography, at up to 96 h of exposure. Dense cell matting was similarly observed on the surfaces of both materials. Interestingly, only 110 transcripts were differentially expressed across the human transcriptome, consistent with the excellent biocompatibility of Y-TZP reported in the literature. These deregulated transcripts are mainly involved in two pathways, the first being related to “mineral uptake” and the second being the “immune response”. These observations suggest that Y-TZP is an interesting candidate for application in implantology.
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