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Mechanical Properties and Microstructures of Glass-Ionomer Cements

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced and Functional Ceramics and Glasses".

Deadline for manuscript submissions: closed (23 September 2021) | Viewed by 6150

Special Issue Editors


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Guest Editor
Department of Biomaterials and Experimental Dentistry, Poznan University of Medical Sciences, Poznan, Poland
Interests: dental materials; glass-ionomer cements; adhesion; conservative dentistry; dental education

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Guest Editor
1. Bluefield Centre for Biomaterials, London, UK
2. Dental Materials Unit, Institute of Dentistry, Queen Mary University of London, London, UK
Interests: restorative dental materials; glass-ionomer cements; adhesion; biocompatibility
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Special Issue Information

Dear Colleague,

Glass-ionomer cements are one of the aesthetic restorative materials currently available in dentistry. These hydrophilic, bioactive cements are being continuously developed and studied. Their unique properties, namely long term fluoride release, adhesion to dentine and enamel, dimensional stability, buffering properties and biocompatibility are responsible for their clinical success when used as permanent or temporary restorations, bases, or luting materials. That includes a minimally invasive dentistry concept proposed together with Atraumatic Restorative Treatment (ART) by WHO for developing and developed countries. Disadvantages of glass-ionomer cements such as brittleness, compressive strength lower than that of dentine and enamel, and compromised polishability limit their indications and constitute a challenge for researchers and manufacturers.

In this Special Issue, we plan to highlight and discuss modern trends in glass-ionomer cements, including methods of measuring and improving their mechanical properties, assessment of their microstructure and interaction with oral cavity environment including adhesion to dentine and enamel, and durability.

It is my pleasure to invite you to submit a manuscript for this Special Issue. Full papers, communications, and reviews are all welcome.

Prof. Beata Czarnecka, DDS, PhD
Prof. John W. Nicholson, DSc, PhD
Guest Editors

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Keywords

  • Glass-ionomer cements
  • Mechanical properties
  • Microstructure
  • Compressive strength
  • Flexural strength
  • Microhardness
  • Adhesion
  • Shear bond strength
  • Erosion
  • Durability
  • Clinical performance

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Published Papers (2 papers)

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Research

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14 pages, 2209 KiB  
Article
Long-Term Water Balance Evaluation in Glass Ionomer Restorative Materials
by Howard Roberts, David Berzins and John Nicholson
Materials 2022, 15(3), 807; https://doi.org/10.3390/ma15030807 - 21 Jan 2022
Cited by 7 | Viewed by 2188
Abstract
The complex role of water in glass ionomer cement (polyalkenoate) dental restorative materials has been studied, but much of the present understanding concerning water balance within these materials is based on very early studies and short-term experiments. This study evaluated the nature of [...] Read more.
The complex role of water in glass ionomer cement (polyalkenoate) dental restorative materials has been studied, but much of the present understanding concerning water balance within these materials is based on very early studies and short-term experiments. This study evaluated the nature of the water species of six conventional and four resin modified glass ionomer restorative materials over 3 years using thermogravimetric analysis techniques. Materials were prepared, placed in crucibles, and stored in physiologic phosphate buffered saline and evaluated at 24 h, 1 week, and then at 1, 3, 6, 9, 12, 18, 24, 30 and 36 months. All materials demonstrated a significant increase in unbound water percentage content but except for the resin modified materials, the enthalpy required to remove the unbound water species did not significantly change over 36 months. Also, bound water content percentage and removal enthalpy was established at 24 h, as no significant increase was noted in both bound water content and removal enthalpy over the course of this evaluation. This study suggests that unbound water species may increase with time and is loosely held except for the resin modified materials. Protective coatings placement and re-evaluation are prudent to prevent unbound water loss. Full article
(This article belongs to the Special Issue Mechanical Properties and Microstructures of Glass-Ionomer Cements)
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Review

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11 pages, 1326 KiB  
Review
Meta-Analysis of In-Vitro Bonding of Glass-Ionomer Restorative Materials to Primary Teeth
by Tamara Peric, Evgenija Markovic, Dejan Markovic and Bojan Petrovic
Materials 2021, 14(14), 3915; https://doi.org/10.3390/ma14143915 - 14 Jul 2021
Cited by 3 | Viewed by 3228
Abstract
Restoration of primary teeth is among the main clinical applications of glass-ionomer cements (GIC). The aim of the study was to review and summarize existing evidence of in vitro bond strength of glass-ionomer (GI) restoratives to enamel and dentin of primary teeth. A [...] Read more.
Restoration of primary teeth is among the main clinical applications of glass-ionomer cements (GIC). The aim of the study was to review and summarize existing evidence of in vitro bond strength of glass-ionomer (GI) restoratives to enamel and dentin of primary teeth. A literature search was performed in PubMed/Medline, Scopus, Web of Science, Cochrane, and Google Scholar databases to identify studies published until April 2021. The search strategy was: (“glass”) and (“ionomer”) and (“primary” or “deciduous”) and (“bond” or “tensile” or “shear”). Two researchers independently retrieved articles that reported on the bond strength of GIC to primary dentin and/or enamel. The meta-analysis was performed to compare the bond strength values of conventional (C) GIC and resin-modified (RM) GIC to different substrates. From 831 potentially eligible articles, 30 were selected for the full-text examination, and 7 were included in the analysis. Studies were rated at high (3), medium (3), and low (1) risk of bias. RM-GIC showed higher bond strength to primary enamel and dentin compared to the C-GIC. Meta-analysis of in vitro studies, evaluating bonding properties of GI restoratives to primary teeth, suggests the superior performance of RM-GIC. However, there is a lack of studies that examine the properties of novel GI formulations. Full article
(This article belongs to the Special Issue Mechanical Properties and Microstructures of Glass-Ionomer Cements)
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