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Tytuł:
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Mechanical degradation of contemporary CAD/CAM resin composite materials after water ageing.
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Autorzy:
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Wendler M; Department of Restorative Dentistry, Faculty of Dentistry, Universidad de Concepción, Chile. Electronic address: .
Stenger A; Dental Clinic 1 - Operative Dentistry and Periodontology, Research Laboratory for Dental Biomaterials, University of Erlangen-Nuremberg, Germany; Institute of Biomaterials, Department of Material Science and Engineering, University of Erlangen-Nuremberg, Germany.
Ripper J; Dental Clinic 1 - Operative Dentistry and Periodontology, Research Laboratory for Dental Biomaterials, University of Erlangen-Nuremberg, Germany.
Priewich E; Dental Clinic 1 - Operative Dentistry and Periodontology, Research Laboratory for Dental Biomaterials, University of Erlangen-Nuremberg, Germany.
Belli R; Dental Clinic 1 - Operative Dentistry and Periodontology, Research Laboratory for Dental Biomaterials, University of Erlangen-Nuremberg, Germany.
Lohbauer U; Dental Clinic 1 - Operative Dentistry and Periodontology, Research Laboratory for Dental Biomaterials, University of Erlangen-Nuremberg, Germany.
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Źródło:
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Dental materials : official publication of the Academy of Dental Materials [Dent Mater] 2021 Jul; Vol. 37 (7), pp. 1156-1167. Date of Electronic Publication: 2021 Apr 29.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Publication: 1998- : Kidlington, Oxford, UK : Elsevier Science
Original Publication: Copenhagen : Munksgaard, c1985-
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MeSH Terms:
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Ceramics*
Water*
Composite Resins ; Computer-Aided Design ; Materials Testing ; Surface Properties
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Contributed Indexing:
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Keywords: Biaxial strength; CAD/CAM; Cyclic fatigue; Fracture toughness; Hydrolytic degradation; Resin composite; Water sorption
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Substance Nomenclature:
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0 (Composite Resins)
059QF0KO0R (Water)
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Entry Date(s):
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Date Created: 20210502 Date Completed: 20210629 Latest Revision: 20210629
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Update Code:
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20240105
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DOI:
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10.1016/j.dental.2021.04.002
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PMID:
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33933272
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Objective: The aim of the present study was to assess the effect of water storage on the quasi-static properties and cyclic fatigue behavior of four contemporary CAD/CAM resin composite materials.
Methods: The CAD/CAM resin composites Grandio Blocs, Lava TM Ultimate, Cerasmart TM and Brilliant Crios, as well as the direct resin composite Grandio SO, were evaluated. Rectangular plates were cut from the blocks or fabricated using a silicon mold to obtain specimens for fracture toughness (K Ic , n = 10), biaxial strength (σ 0 , n = 30) and cyclic fatigue testing (n = 30). Half of the specimens was stored for 24 h in dry conditions and the other half was aged for 60 days in distilled water at 37 °C. K Ic was determined using the Compact-Tension (C(T)) method and σ 0 and cyclic fatigue were tested using the Ball-on-Three-Balls assembly. Additional disc-shaped specimens (n = 5) were produced to obtain water sorption curves of the materials. Weibull statistics and two-way ANOVA with Tukey's post-hoc test were used for data assessment.
Results: The highest water sorption was observed for Lava TM Ultimate (42.6 μg/mm 3 ), whereas Grandio SO displayed the lowest uptake (14 μg/mm 3 ). A statistically significant drop in K Ic and σ 0 was measured for all materials after water storage, except for the σ 0 of Cerasmart TM . Water ageing had a dissimilar effect on the cyclic fatigue behavior, increasing the slow crack growth susceptibility of Lava TM Ultimate, but decreasing it for Cerasmart TM and Brilliant Crios.
Significance: Contemporary CAD/CAM resin composites are susceptible to water driven degradative processes, although differences in filler content and resin matrix constitution play an important role in how it impacts their mechanical properties.
(Copyright © 2021 The Academy of Dental Materials. Published by Elsevier Inc. All rights reserved.)
