Submit to Special Issue Submit Abstract to Special Issue Review for Coatings Propose a Special Issue

Journal Browser

Surface Properties of Dental Materials and Instruments, 2nd Edition

Print Special Issue Flyer
Special Issue Editors
Special Issue Information
Keywords
Published Papers

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Bioactive Coatings and Biointerfaces".

Deadline for manuscript submissions: 20 August 2024 | Viewed by 6351

Share This Special Issue

Special Issue Editors

Prof. Dr. Monika Lukomska-Szymanska

E-Mail Website
Guest Editor

Department of Restorative Dentistry, Medical University of Łódź, 92213 Łódź, Poland
Interests: bruxism; masticatory muscles; personality; coping mechanisms; diagnostics; treatment; dental materials; dental instruments; antimicrobial properties; chemical properties; mechanical properties
Special Issues, Collections and Topics in MDPI journals

Prof. Dr. Louis Hardan

E-Mail Website
Guest Editor

Department of Esthetic and Restorative Dentistry, School of Dentistry, Saint-Joseph University, Beirut, Lebanon
Interests: dental adhesive; antibacterial activity; restoration; endodontically treated tooth; dental biomaterials; resin cement; digital dentistry
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Dental materials and instruments are constantly being improved. Additionally, every day, new products are being introduced onto the market. This Special Issue will evaluate the antimicrobial, chemical, tribological, and mechanical surface properties of commercially available/experimental dental materials and instruments.

These products undergo chemical and mechanical degradation during use. As a result, the properties of these products may change significantly, adversely affecting their clinical performance. Moreover, the influence of surface properties on clinical performance and durability, related to ion/molecule migration due to wear and corrosion into the oral environment, is an important topic of interest.

Dental materials and instruments are subjected to microbial biofilm. Therefore, the evaluation and enhancement of dental products’ antimicrobial properties set new trends in the development of material sciences. Additionally, research on the subsequent effect of microbial action on materials may contribute to further scientific development.

Dental materials such as adhesive systems, composite resins, ceramics, implants, alloys, and acrylic resins are exposed to oral environments and undergo chemical changes and mechanical factors. Moreover, instruments such as endodontic files and burs are subjected to varying conditions during use and sterilization processes.

Reviews and research on both experimental and commercially available products are welcome.

Prof. Dr. Monika Lukomska-Szymanska
Prof. Dr. Louis Hardan
Guest Editors

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.

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. Coatings 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 2600 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

surface properties
surface topography
surface wear
antimicrobial properties
dental materials
dental instruments

Published Papers (6 papers)

Download All Papers

Research

Jump to: Review

12 pages, 2555 KiB

Open AccessArticle

Effects of Nano-Diamond-Coated Milling Bits on Cutting Dental Zirconia

by Hao Ding, Zeqian Pan, Yee Man Loh, Chunjin Wang and James Kit Hon Tsoi

Coatings 2024, 14(4), 473; https://doi.org/10.3390/coatings14040473 - 12 Apr 2024

Viewed by 778

Abstract

Hard alloy end mills are commonly employed for milling zirconia prostheses in dentistry. Nano-diamond-coated milling bits ensure high processing efficiency, accuracy, extended tool life, and reduced processing costs. This study aims at comparing various effects of cutting dental zirconia with nano-diamond-coated and ordinary milling bits. Two types of milling bits, one with nano-diamond coating and one without, were used to cut the dental zirconia green blanks (Ø98.5 mm, thickness: 25 mm) at three different speeds (1000, 1500, and 2000 rpm) in a dental milling machine. The unsintered and sintered zirconia surfaces were evaluated with glossmeter, optical profilometer for surface roughness, SEM, and EDX. The glossiness of the sintered zirconia block was statistically higher than that of the unsintered block (p < 0.05). For sintered zirconia, the nano-diamond-coated milling bit yielded a statistically (p < 0.05) higher glossiness in all spindle speeds than uncoated, save for the uncoated milling bit used at 1500 rpm. However, in terms of roughness, only sintering showed to be a statistically significant factor (p < 0.001) outweighing other two factors, and sintered zirconia always yielded lower surface roughness than the unsintered counterpart. Overall, the nano-diamond-coated milling bit can be operated at various speeds, resulting in a higher gloss on the sintered zirconia block, while an ordinary, uncoated milling bit can only achieve the same glossiness at a designated speed. The type of milling bits and the speeds have no significant effect on the surface roughness. Full article

(This article belongs to the Special Issue Surface Properties of Dental Materials and Instruments, 2nd Edition)

► Show Figures

Figure 1

11 pages, 3887 KiB

Open AccessArticle

Comprehensive Characterization of Blue Wire NiTi File Failure: A Comparative Analysis of Cyclic Fatigue and Torsional Resistance Properties

by Reem M. Barakat, Rahaf A. Almohareb, Fahda N. Algahtani, Amal A. Altamimi, Jenan I. Alfuraih, Lena S. Bahlol and Ahmed Jamleh

Coatings 2024, 14(3), 361; https://doi.org/10.3390/coatings14030361 - 19 Mar 2024

Viewed by 726

Abstract

This study compared the fatigue resistance and elemental composition of two blue heat-treated nickel–titanium (NiTi) files used in root canal preparation as follows: Tia Tornado Blue (TTB) and Race Evo (RE) file systems. For cyclic fatigue testing, the two systems were tested where each file was rotated inside an artificial metal canal submerged in either sodium hypochlorite or saline solution until fracture. Time to fracture was recorded. For torsional fatigue testing, the file tip was secured while the file was allowed to rotate at a fixed rate until fracture. Torque at failure was recorded. The two experiments were performed at simulated body temperature and the length of fractured segments was measured. Statistical analysis was carried out with a significance level (p-value) set at 5%. The mean cycles to fracture for RE were superior to that of TTB irrespective of the solution used (p < 0.05). TTB’s cyclic fatigue resistance decreased in NaOCl (p < 0.0001). RE demonstrated lower torque at failure (p = 0.002). All files were fractured at comparable lengths (p = 0.218). Although RE is considered more resistant to cyclic fatigue, it showed inferior torsional resistance compared with TTB. The NaOCl negatively affected the TTB’s cyclic fatigue resistance. Full article

(This article belongs to the Special Issue Surface Properties of Dental Materials and Instruments, 2nd Edition)

► Show Figures

Figure 1

15 pages, 1576 KiB

Open AccessArticle

The Influence of Alumina Airborne-Particle Abrasion on the Properties of Zirconia-Based Dental Ceramics (3Y-TZP)

by Paulina Łagodzińska, Beata Dejak and Bartłomiej Konieczny

Coatings 2023, 13(10), 1691; https://doi.org/10.3390/coatings13101691 - 26 Sep 2023

Viewed by 793

Abstract

The objective of this study was to assess the effect of airborne-particle abrasion with alumina particles of various sizes (50 μm, 110 μm, 250 μm) on the surface properties of 3Y-TZP (3 mol% yttria-stabilized tetragonal zirconia polycrystals). The analysis comprised the Vickers hardness test (HV1kp), a surface roughness evaluation (Ra, Rq, Rz, Rsk, Rsm, Rt, Vo, profile displays), and SEM–EDS microanalysis (scanning electron microscopy–energy-dispersive X-ray spectroscopy). Any statistical relationships were assessed using the Kruskal–Wallis one-way analysis-of-variance-by-rank test (p = 0.05). While airborne-particle abrasion with 50 µm alumina significantly increases the Vickers hardness of 3Y-TZP (1678.8 HV1kp), 110 μm and 250 μm alumina particles do not appear to have any such effect. The surface roughness of 3Y-TZP increases with the size of the alumina particles (Ra, Rq, Rz, Rt, Vo: vertical plane and retention volume assessment); a higher Rsm (horizontal plane assessment) was noted for specimens air-abraded with 250 µm alumina particles; air abrasion with 50 μm alumina particles yielded a symmetrical surface roughness profile (Rsk). The major topographic pattern of the surface of 3Y-TZP is altered by alumina airborne-particle abrasion, with larger alumina particles causing more severe changes. Aluminum traces on the 3Y-TZP surface are observed. The shape of the alumina particles is irregular, with rough edges; the size of the alumina particles plays a significant role in the air abrasion of zirconia-based dental ceramics, affecting their morphology and properties. Full article

(This article belongs to the Special Issue Surface Properties of Dental Materials and Instruments, 2nd Edition)

► Show Figures

Figure 1

11 pages, 2886 KiB

Open AccessArticle

Eighteen-Month Orthodontic Bracket Survival Rate with the Conventional Bonding Technique versus RMGIC and V-Prep: A Split-Mouth RCT

by Victor Ghoubril, Joseph Ghoubril, Maher Abboud, Tatiana Bou Sakr, Louis Hardan and Elie Khoury

Coatings 2023, 13(8), 1447; https://doi.org/10.3390/coatings13081447 - 16 Aug 2023

Viewed by 849

Abstract

The association of the V-prep and a resin-modified glass ionomer cement (RMGIC) has shown to be a suitable alternative for the orthodontic bracket bonding procedure in vitro. The aim of this study was to evaluate over eighteen months the clinical bonding failure and survival rates of the conventional bonding technique using the Transbond XT (3M Unitek, Monrovia, CA, USA) and the RMGIC Fuji Ortho LC (GC Corporation, Tokyo, Japan) prepared with the V-prep. Therefore, one operator using the straight-wire technique bonded two hundred metallic brackets to upper and lower premolars of twenty-five patients requiring an orthodontic treatment. The randomized trial was a single-blind design in a split-mouth comparison. Each patient was randomly allocated one of the two bonding systems for each premolar on each side of the mouth. The bonding and rebonding techniques were standardized throughout the trial and bond failure was recorded each month for a period of eighteen months. The survival rates of the brackets were estimated by Kaplan–Meier and log-rank test (p < 0.05). A total of 200 orthodontic brackets were included in the study with a significant lower failure rate of 9.0% for the V-prep and RMGIC compared to 25.0% for the conventional bonding technique (p < 0.05). A higher survival rate was observed for the V-prep and RMGIC (16.36 months) over the conventional bonding technique (13.95 months) (p < 0.05). Lower premolar bonding failure was higher than upper premolar for both bonding techniques. The V-prep followed by RMGIC, with enamel surface protection abilities, can be used as an alternative bonding technique in an orthodontic treatment. Full article

(This article belongs to the Special Issue Surface Properties of Dental Materials and Instruments, 2nd Edition)

► Show Figures

Figure 1

8 pages, 277 KiB

Open AccessArticle

Can Sodium Ascorbate Increase the In Vitro Bond Strength of the Interface between a Composite and Bleached Enamel?

by Louis Hardan, Rim Bourgi, Carlos Enrique Cuevas-Suárez, Maroun Ghaleb, Khalil Kharma, Ryan Harouny, Mateusz Radwanski and Monika Lukomska-Szymanska

Coatings 2023, 13(6), 1064; https://doi.org/10.3390/coatings13061064 - 8 Jun 2023

Viewed by 912

Abstract

Recently, the use of antioxidants before the bonding of bleached enamel was considered effective for reversing the reduction in the bond strength. This article aimed to assess the influence of different sodium ascorbate (SA) presentations (liquid, gel, and semi-gel) on the composite resin–enamel bond strength after a bleaching protocol. Sound human anterior teeth were collected, cleaned, prepared for a bond strength test, and randomly allocated into groups according to the bonding procedure. Group 1 acted as a control, without bleaching treatment, and without applying an antioxidant agent. In groups 2–6, specimens were bleached using 10% carbamide peroxide. In groups 3, 4 and 5, 10% wt% SA was applied for 10 min as an antioxidant in the form of a liquid, gel, and semi-gel, respectively. In group 6, samples were bleached and immersed in fresh human saliva for 14 days. After the bleaching process, the materials were restored by means of an adhesive system and a resin composite material. The analysis revealed that the differences between the shear bond strength (SBS) between the different groups were statistically significant (p = 0.0469). The highest SBS was achieved for the group where the 10 wt% SA liquid was applied before the bonding procedures. The application of liquid 10 wt% SA might reverse the negative impact that bleaching has on the bond strength of a resin composite and enamel. Full article

(This article belongs to the Special Issue Surface Properties of Dental Materials and Instruments, 2nd Edition)

Review

Jump to: Research

13 pages, 782 KiB

Open AccessEditor’s ChoiceReview

Changes in Strength Parameters of Composite Cements as Affected by Storage Temperature—A Review of the Literature

by Joanna Giełzak, Beata Dejak, Jerzy Sokołowski and Kinga Bociong

Coatings 2023, 13(2), 244; https://doi.org/10.3390/coatings13020244 - 20 Jan 2023

Cited by 1 | Viewed by 1698

Abstract

Fixed restorations are now among the most common restorations in modern dental prosthodontics. The current view in prosthodontics of maximum preparation economy is causing an increased interest in the mechanical properties of cements. Among the most important properties of materials used for indirect cementation are mechanical properties, i.e., hardness and compressive strength. These properties can change as a result of changes in physical factors. The purpose of this study was to analyze the available literature on the effect of conditioning temperature of cements used for cementation of indirect fixed restorations on the durability of their bonding to dental tissues and their mechanical and physical properties. The following databases were used: Mendeley, PubMed, ResearchGate, National Library of Medicine, and Google Scholar. Analysis of the available literature was carried out according to the Prisma diagram program. Forty-eight articles were selected, which were the following types of studies: clinical reports, research article, and review articles. Some studies indicated that mechanical properties, such as flexural strength, polymerization shrinkage, and conversion factor, did not change after heating the composite material. According to some researchers, preheating the composite material increased its conversion degree, which consequently led to an increase in hardness and fracture toughness, an increase in flexural strength and an increase in elastic modulus, and an increase in abrasion resistance. Studies on changes in the mechanical and physical properties of composite materials, as well as composite cements, have not always provided clear answers, as there are still no laboratory and clinical studies that fully confirm the benefits of heating composite cements. Conducting studies evaluating the effect of elevated storage temperature on the strength parameters of cements, in conjunction with the type of material and its composition, could provide answers to many clinical questions that are still unresolved. If the benefits of heating cements were unequivocally confirmed in laboratory studies, this could open up many possibilities for improving the retention of fixed prosthetic restorations. Full article

(This article belongs to the Special Issue Surface Properties of Dental Materials and Instruments, 2nd Edition)

► Show Figures