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The Effects of Water on Degradation of the Zirconia-Resin Bond

Chen, C ; Chen, Y ; Lu, Z ; Qian, M ; Xie, H ; Tay, F.R

Journal of dentistry, 2017-09, Vol.64, p.23-29 [Periódico revisado por pares]

England: Elsevier Ltd

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Título:
The Effects of Water on Degradation of the Zirconia-Resin Bond
Autor: Chen, C ; Chen, Y ; Lu, Z ; Qian, M ; Xie, H ; Tay, F.R
Assuntos: Acrylic resins ; Adhesion ; Aging ; Bond strength ; Bonding strength ; Cement ; Ceramics ; Composite Resins - chemistry ; Conditioning ; Dental Bonding ; Dental Leakage ; Dental Materials - chemistry ; Dental Stress Analysis ; Dentin-Bonding Agents - chemistry ; Dentistry ; Diffraction ; Dyes ; Etching ; Grit ; Humans ; Hydrogen-Ion Concentration ; Hydrolysis ; Inductively coupled plasma mass spectrometry ; Infiltration ; Integrity ; Interfaces ; Mass spectrometry ; Mass spectroscopy ; Materials Testing ; Mathematical analysis ; MDP ; Methacrylates - chemistry ; Methylene blue ; Phosphate esters ; Phosphate resin monomer ; Phosphorus ; Phosphorus - analysis ; Plates ; Primer ; Primers ; Resin Cements - chemistry ; Resins ; Scientific imaging ; Shear Strength ; Soaking ; Studies ; Surface Properties ; Surface treatment ; Tetragonal zirconia ; Tetragonal zirconia polycrystals ; Thermodynamics ; Water ; Water - chemistry ; X-ray diffraction ; X-Ray Diffraction - methods ; Yttria-stabilized zirconia ; Yttrium ; Yttrium oxide ; Zirconia ; Zirconium ; Zirconium - chemistry ; Zirconium dioxide
É parte de: Journal of dentistry, 2017-09, Vol.64, p.23-29
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descrição: Abstract Objectives 10-methacryloyloxydecyldihydrogenphosphate (MDP) containing primers improve bonding of yttria-stabilised tetragonal zirconia (Y-TZP) to methacrylate resins. The present study investigated the role played by water in the deterioration of MDP-mediated zirconia-resin bonds. Methods Grit-blasted Y-TZP plates were conditioned with two MDP primers and bonded with resin for shear bond strength (SBS) testing. Additional bonded plates were aged hydrothermally and compared with unaged Y-TZP after 24 hours of water-storage or 6 months of water/acid/alkali-storage. The monoclinic phase ( m –ZrO2 ) in different groups was determined by X-ray diffraction. Hydrolytic stability of the coordinate bond between MDP and zirconia in neutral/acid/alkaline environment was analysed using thermodynamic calculations. Microleakage and release of the element phosphorus from MDP-mediated Y-TZP/resin-bonded interfaces were evaluated via methylene blue dye infiltration and inductively coupled plasma-mass spectrometry (ICP-MS). Results Hydrothermal ageing did not significantly alter SBS. Ageing in acidic or neutral medium led to significant decline in SBS. The m –ZrO2 phase increased after hydrothermal aging but no m –ZrO2 was detected in the water/acid/alkali-aged specimens. A higher equilibrium constant was identified in the MDP– t –ZrO2 complex when compared with the MDP– m –ZrO2 complex. MDP-conditioning failed to prevent infiltration of the methylene blue dye. Phosphorus was detected by ICP-MS from the solutions used for soaking the resin-bonded specimens. Conclusions Hydrolysis of the coordinate bond between MDP and ZrO2 , rather than t → m phase transformation, weakens the bond integrity between MDP-conditioned Y-TZP and methacrylate resin. Clinical Significance: Hydrolysis of the coordinate bond between MDP and zirconia is responsible for deterioration of the integrity of the bond between MDP-conditioned Y-TZP and methacrylate resin.
Editor: England: Elsevier Ltd
Idioma: Inglês

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The Effects of Water on Degradation of the Zirconia-Resin Bond

Chen, C ; Chen, Y ; Lu, Z ; Qian, M ; Xie, H ; Tay, F.R

England: Elsevier Ltd

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