Special Issue "Nanomaterials and Nanotechnology in Dentistry"

A special issue of Nanomaterials (ISSN 2079-4991).

Deadline for manuscript submissions: 30 November 2019.

Special Issue Editor

Guest Editor
Prof. Dr. Antonella Polimeni

Department of Oral and maxillofacial Sciences, Università degli Studi di Roma La Sapienza, Rome, Italy
Website | E-Mail
Interests: nanotechnology; dental nanomaterials; oral pathology; pediatric dentistry

Special Issue Information

Dear Colleagues,

The aim of this Special Issue is to provide theoretical and practical knowledge on the application of innovative nanotechnologies and nanomaterials that cross through a translational approach, bringing together all the various specialties involved in the study of dentistry and applied to the biomedical research.

The approach for studying oral diseases (inflammatory, degenerative, metabolic, and neoplastic) has changed dramatically in recent years with the advent of new methods of analysis (from anatomy to clinical–instrumental pathophysiological interpretation, from molecular biology to proteomics, from functional and morphological analysis, structural and ultrastructural, to the studies in vitro and in a single cell). There is also increasing evidence of the importance of the involvement of stem compartments and their use, as in the case of human-derived mesenchymal cells taken from dental pulp and cells of the microenvironment in the pathogenesis of these diseases. Finally, it seems important to underline the growing development of experimental medicine and medical/surgical biotechnology as the evaluation and the use of new biomaterials–biomimetics combined with sophisticated and minimally invasive surgical techniques.

Prof. Dr. Antonella Polimeni
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 papers will be 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.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Nanomaterials is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • nanostructures
  • nanomaterials
  • nanotechnology in dentistry

Published Papers (3 papers)

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Research

Open AccessArticle
Composition―Nanostructure Steered Performance Predictions in Steel Wires
Nanomaterials 2019, 9(8), 1119; https://doi.org/10.3390/nano9081119
Received: 17 July 2019 / Revised: 30 July 2019 / Accepted: 30 July 2019 / Published: 3 August 2019
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Abstract
Neutron scattering in combination with scanning electron and atomic force microscopy were employed to quantitatively resolve elemental composition, nano- through meso- to metallurgical structures and surface characteristics of two commercial stainless steel orthodontic archwires—G&H and Azdent. The obtained bulk composition confirmed that both [...] Read more.
Neutron scattering in combination with scanning electron and atomic force microscopy were employed to quantitatively resolve elemental composition, nano- through meso- to metallurgical structures and surface characteristics of two commercial stainless steel orthodontic archwires—G&H and Azdent. The obtained bulk composition confirmed that both samples are made of metastable austenitic stainless steel type AISI 304. The neutron technique’s higher detection sensitivity to alloying elements facilitated the quantitative determination of the composition factor (CF), and the pitting resistance equivalent number (PREN) for predicting austenite stability and pitting-corrosion resistance, respectively. Simultaneous neutron diffraction analyses revealed that both samples contained additional martensite phase due to strain-induced martensite transformation. The unexpectedly high martensite content (46.20 vol%) in G&H was caused by combination of lower austenite stability (CF = 17.37, p = .03), excessive cold working and inadequate thermal treatment during material processing. Together, those results assist in revealing alloying recipes and processing history, and relating these with corrosion resistance and mechanical properties. The present methodology has allowed access to unprecedented length-scale (μm to sub-nm) resolution, accessing nano- through meso-scopic properties. It is envisaged that such an approach can be extended to the study and design of other metallic (bio)materials used in medical sciences, dentistry and beyond. Full article
(This article belongs to the Special Issue Nanomaterials and Nanotechnology in Dentistry)
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Graphical abstract

Open AccessArticle
Experimental Study of the Pressures and Points of Application of the Forces Exerted between Aligner and Tooth
Nanomaterials 2019, 9(7), 1010; https://doi.org/10.3390/nano9071010
Received: 20 June 2019 / Revised: 8 July 2019 / Accepted: 10 July 2019 / Published: 12 July 2019
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Abstract
The analysis of forces, moments and pressure points has long been of great interest in orthodontics. Hence, we set out to define a method for measuring the pressure exerted by aligners on the teeth, and specifically to identify the precise points of pressure [...] Read more.
The analysis of forces, moments and pressure points has long been of great interest in orthodontics. Hence, we set out to define a method for measuring the pressure exerted by aligners on the teeth, and specifically to identify the precise points of pressure exertion. Intraoral scans were performed on a patient with optimal alignment and levelling before and after 2º vestibularisation of the upper central incisor. Pressure sensor film was placed in a dedicated housing between the aligner and teeth in order to record the pressure exerted after 15 s of aligner application. The images captured by the film were scanned, digitised, and subsequently analysed. Areas and amounts of pressure generated by the aligners were evaluated, and the net force of each was calculated, adjusted to take into consideration passive values. The method revealed the areas of contact by which the aligner transmits force on the teeth, and the pressures at which it does so. The pressure exerted by an aligner is not evenly distributed across the entire surface of the tooth during lingual tipping of an upper incisor. The areas of force concentration were not identical, as these are influenced by factors resulting from the manufacturing and casting processes. Full article
(This article belongs to the Special Issue Nanomaterials and Nanotechnology in Dentistry)
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Open AccessArticle
Application of a Molybdenum and Tungsten Disulfide Coating to Improve Tribological Properties of Orthodontic Archwires
Nanomaterials 2019, 9(5), 753; https://doi.org/10.3390/nano9050753
Received: 8 April 2019 / Revised: 7 May 2019 / Accepted: 14 May 2019 / Published: 16 May 2019
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Abstract
Coatings incorporating nanoparticles of molybdenum and tungsten disulfide (MoS2 and WS2)—known for their lubricating properties—are applied to orthodontic stainless steel wires to verify if there is an improvement in terms of tribological properties during the sliding of the wire along [...] Read more.
Coatings incorporating nanoparticles of molybdenum and tungsten disulfide (MoS2 and WS2)—known for their lubricating properties—are applied to orthodontic stainless steel wires to verify if there is an improvement in terms of tribological properties during the sliding of the wire along the bracket. To simulate in vitro sliding of the wire along the bracket and evaluate friction 0.019 × 0.025 inches orthodontic stainless steel (SS) wires were subjected to the application, by electrodeposition, of Ni, Ni + MoS2, and Ni + WS2. The samples produced were analyzed with scanning electron microscopy and assessment of resistance to bending. Thirty-two test conditions have been analyzed, arising from the combination of four types of coatings (SS bare wires and strings with three types of coating), two types of self-ligating bracket (Damon Q, Ormco and In-Ovation R, GAC International), two bracket-wire angles (0° and 5°), two environments (dry and wet). Analyses carried out on the samples show acceptable coatings incorporating MoS2 and WS2 and a resistance of coatings after a minimum bending. In “dry conditions” a statistically significant decrease in friction occurs for wires coated with MoS2 and WS2 if associated with the In-Ovation bracket. In “wet conditions” this decrease is observed only in isolated test conditions. Analysis of the wires after sliding tests show little wear of the applied coatings. Nanoparticles are acceptable and similar in their behavior. Improvements in terms of friction are obtained pairing coatings incorporating MoS2 and WS2 with the In-Ovation bracket in dry conditions. Full article
(This article belongs to the Special Issue Nanomaterials and Nanotechnology in Dentistry)
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