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Special Issue "Novel Dental Restorative Materials (Volume II)"

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A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Biomaterials".

Deadline for manuscript submissions: 20 January 2024 | Viewed by 1844

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Prof. Dr. Nicoleta Ilie

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Guest Editor

Department of Conservative Dentistry and Periodontology, University Hospital, LMU, 80336 Munich, Germany
Interests: structure–property relationship in dental materials; characterization of materials and strategies for simplified restorative concepts, novel monomer and/or filler systems for dental materials
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Special Issue Information

Dear Colleagues,

The Special Issue, “Novel Dental Restorative Materials”, aims to offer a broad overview of current and modern dental restoration materials, while connecting their potential development strategies, properties, clinical applications, and performance. A platform should thus be provided to present innovative dental material developments, involving a vast area of application and treatment strategies, but also to appraise the pertinence of the performance and behavior of already-established materials and treatments. This should permit a valuation of dental materials and treatments that are currently available, help to identify their deficits, provide solutions, and emphasize the needs and directions for further developments. The submission of original high-quality research papers and comprehensive reviews which address the state-of-the-art in dental restorative materials and treatments is therefore encouraged.

Prof. Dr. Nicoleta Ilie
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

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Keywords

dental materials
properties
clinical assessment
application techniques
performance

Published Papers (3 papers)

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Research

Open AccessArticle

Inhibition of Caries around Restoration by Ion-Releasing Restorative Materials: An In Vitro Optical Coherence Tomography and Micro-Computed Tomography Evaluation

and

Materials 2023, 16(16), 5558; https://doi.org/10.3390/ma16165558 - 10 Aug 2023

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Abstract

The objective of this study was firstly to assess the demineralization inhibitory effect of ion-releasing restorations in enamel adjacent to restoration using a biofilm caries model and secondly to compare the effect to that in a chemical caries model. Fifty-six bovine incisors were filled with either Surefil one (SuO), Cention N (CN) (both ion-releasing materials), Ketac-Molar (GIC) or Powerfill resin composite (RC). The restored teeth were then randomly divided into 2 groups according to the used caries model (biofilm or chemical caries model). The micro-computed tomography (MicroCt) and optical coherence tomography (OCT) outcome measures used to evaluate demineralization inhibition effects were lesion depth, LD and increase in OCT integrated reflectivity, ΔIR, at five different depths. It was observed that all outcome measures of CN were statistically the same as those of GIC and conversely with those of RC. This was also the case for SuO except for LD, which was statistically the same as RC. When comparing the two caries models, LD of the biofilm model was statistically deeper (p < 0.05) than the chemical model for all four materials. In conclusion, CN and SuO have similar demineralization inhibitory effects as GIC, and the biofilm caries model is more discriminatory in differentiating demineralization inhibitory effects of ion-releasing restorative material. Full article

(This article belongs to the Special Issue Novel Dental Restorative Materials (Volume II))

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Open AccessArticle

Proposition of New Testing Procedure for the Mechanical Properties of Bulk-Fill Materials

Danijela Juric-Kacunic

and

Zrinka Tarle

Materials 2023, 16(13), 4868; https://doi.org/10.3390/ma16134868 - 07 Jul 2023

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Abstract

This study analysed flexural properties, microhardness, and the degree of conversion (DC) of five bulk-fill composites under clinically relevant conditions (4 mm thick specimens) in comparison to 2 mm specimens according to ISO 4049. Additionally, the effect of rapid polymerisation on 4 mm specimens was evaluated after accelerated aging. DC was measured using Fourier transform infrared spectrometry at 2 and 4 mm thick layers, while flexural properties and Vickers microhardness were tested using 16 × 2 × 2 mm or 16 × 2 × 4 mm specimens. Three polymerisation protocols were used: (I) “ISO”: 2 mm thickness, 1000 mW/cm², double-sided; (II) “10 s”: 4 mm thickness, 1000 mW/cm², one-sided; and (III) “3 s”: 4 mm thickness, 2600 mW/cm², one-sided. Mechanical properties were tested after 1 day, after 10,000 thermocycles, and after 10,000 thermocycles followed by a 7-day immersion in absolute ethanol. The “ISO” protocol produced a higher DC and microhardness of all materials. Elastic modulus was significantly higher for the “ISO” protocol compared to the 4 mm specimens. The differences in flexural strength for all polymerisation protocols were equalised after thermocycling and immersion in absolute ethanol. All tested materials met the ISO 4049 flexural strength requirement (80 MPa) for all polymerisation methods and all aging conditions. Rapid polymerisation achieved nearly optimal properties (ISO), except for elastic modulus, which was significantly reduced in 4 mm samples. Full article

(This article belongs to the Special Issue Novel Dental Restorative Materials (Volume II))

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Open AccessArticle

Accelerated versus Slow In Vitro Aging Methods and Their Impact on Universal Chromatic, Urethane-Based Composites

Nicoleta Ilie

Materials 2023, 16(6), 2143; https://doi.org/10.3390/ma16062143 - 07 Mar 2023

Cited by 2 | Viewed by 772

Abstract

Structural coloring of dental resin-based composites (RBC) is used to create universal chromatic materials designed to meet any aesthetic need, replacing the mixing and matching of multiple shades. The microstructural adjustments to create this desideratum involve nanoscale organic–inorganic core–shell structures with a particular arrangement. The generally higher polymer content associated with these structures compared to universal chromatic RBCs colored by pigments, which in their microstructure come close to regularly shaded RBCs, can influence the way the material ages. Accelerated and slow aging up to 1.2 years of immersion in artificial saliva at 37 °C were therefore compared in relation to their effects on the materials described above and in relation to the immersion conditions prescribed by standards. Quasi-static and viscoelastic parameters were assessed to quantify these effects by a depth-sensing indentation test equipped with a DMA module. The microstructure of the materials was characterized by scanning electron microscopy. The results convincingly show a differentiated influence of the aging protocol on the measured properties, which was more sensitively reflected in the viscoelastic behavior. Accelerated aging, previously associated with the clinical behavior of RBCs, shows a 2- to 10-fold greater effect compared to slow aging in artificial saliva of up to 1.2 years, highly dependent on the microstructure of the material. Full article

(This article belongs to the Special Issue Novel Dental Restorative Materials (Volume II))

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