Modern Polymers for Dental Application 2.0

A special issue of Biomedicines (ISSN 2227-9059). This special issue belongs to the section "Biomedical Engineering and Materials".

Deadline for manuscript submissions: closed (31 March 2023) | Viewed by 10573

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Guest Editor
Department of Prosthetic Dentistry and Materials Sciences, University of Leipzig, Augustuspl. 10, 04109 Leipzig, Germany
Interests: dentistry; oral-health-related quality of life; temporomandibular disorders; temporomandibular joint; psychometric properties in questionnaires; polymers in prosthetic dentistry; tooth wear
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Special Issue Information

Dear Colleagues,

Polymers have many applications in the dental field. Diverse types of polymeric and composite materials are used for dental treatment, especially in prosthetic and restorative dentistry. Moreover, in recent years, due to computer-assisted manufacturing procedures such as milling and 3D printing, new materials have become available for dental purposes. Typical examples are dental veneers, partial crowns, splints, and frameworks of fixed as well as removable dentures.

The aim of this Special Issue is to provide the latest information on dental materials, especially in polymeric and composite materials. Topics in this Special Issue include but are not limited to the development and application of recent polymer-based dental materials and their biological and mechanical properties, their clinical performance evaluation, as well as machining and 3D printing devices. Original articles in vitro and in vivo, and reviews are all welcome.

Dr. Oliver Schierz
Guest Editor

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Keywords

  • tooth-shaded restorations
  • metal-free restorations
  • prosthetic dentistry
  • adhesive dentistry
  • CAD/CAM processing
  • dental splints
  • removable dental prostheses
  • fixed partial denture
  • polyaryletherketone
  • polyoxymethylene
  • polycarbonate

Related Special Issue

Published Papers (5 papers)

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Research

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11 pages, 738 KiB  
Article
Correlation of Shear Bond Strength and Degree of Conversion in Conventional and Self-Adhesive Systems Used in Orthodontic Bonding Procedures
by Vjera Perković, Marina Šimunović Aničić, Vanni Lughi, Lucia Pozzan, Senka Meštrović and Gianluca Turco
Biomedicines 2023, 11(5), 1252; https://doi.org/10.3390/biomedicines11051252 - 23 Apr 2023
Cited by 4 | Viewed by 1185
Abstract
(1) Background: Self-adhesive systems have been proposed for the orthodontic bonding with the intention to reduce the traditional three-component system. (2) Methods: The sample consisted of 32 extracted intact permanent premolars randomly divided into two groups (n = 16). In Group I [...] Read more.
(1) Background: Self-adhesive systems have been proposed for the orthodontic bonding with the intention to reduce the traditional three-component system. (2) Methods: The sample consisted of 32 extracted intact permanent premolars randomly divided into two groups (n = 16). In Group I the metal brackets were bonded with Transbond XT Primer and Transbond XT Paste. In Group II the metal brackets were bonded with GC Ortho connect. The resin was polymerized for 20 s from two directions (mesial and occlusal) using a Bluephase light-curing unit. The shear bond strength (SBS) was measured using a universal testing machine. Immediately after SBS testing, Raman microspectrometry was performed for each sample to calculate the degree of conversion (DC). (3) Results: There was no statistically significant difference in the SBS between the two groups. A significantly higher DC (p < 0.001) value was recorded in Group II, in which the brackets were bonded with GC. Very weak or no correlation (0.01) was recorded between SBS and DC in Group I and moderate positive correlation was recorded in Group II (0.33). (4) Conclusions: No difference was found in SBS between the conventional and two-step systems used in orthodontics. The two-step system demonstrated higher DC compared to the conventional system. There is a very weak or moderate correlation between DC and SBS. Full article
(This article belongs to the Special Issue Modern Polymers for Dental Application 2.0)
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13 pages, 2273 KiB  
Article
The Effect of a Digital Manufacturing Technique, Preparation Taper, and Finish Line Design on the Marginal Fit of Temporary Molar Crowns: An In-Vitro Study
by Maryam H. Mugri, Harisha Dewan, Mohammed E. Sayed, Fawzia Ibraheem Shaabi, Hanan Ibrahim Hakami, Hossam F. Jokhadar, Nasser M. Alqahtani, Ahid Amer Alshahrani, Abdullah S. Alabdullah, Abdullah Hasan Alshehri, Mohammed Hussain Dafer Al Wadei, Fatimah Yahya Arif, Ebtihag H. Adawi, Bandar M. A. Al-Makramani and Hitesh Chohan
Biomedicines 2023, 11(2), 570; https://doi.org/10.3390/biomedicines11020570 - 15 Feb 2023
Cited by 3 | Viewed by 1890
Abstract
The aim of this study is to investigate the combined effect of a digital manufacturing technique (subtractive vs. additive), preparation taper (10° vs. 20° TOC), and finish line (chamfer vs. shoulder) on the marginal adaptation of temporary crowns following cementation with a compatible [...] Read more.
The aim of this study is to investigate the combined effect of a digital manufacturing technique (subtractive vs. additive), preparation taper (10° vs. 20° TOC), and finish line (chamfer vs. shoulder) on the marginal adaptation of temporary crowns following cementation with a compatible temporary cement. Four mandibular first molar typodont teeth were prepared for full coverage crowns with standard 4 mm preparation height as follows: 10° TOC with the chamfer finish line, 10° TOC with the shoulder finish line, 20° TOC with the chamfer finish line and 20° TOC with the shoulder finish line. Each of the four preparation designs were subdivided into two subgroups to receive CAD/CAM milled and 3D-printed crowns (n = 10). A total of 80 temporary crowns (40 CAD/CAM milled and 40 3D-printed) were cemented to their respective die using clear temporary recement in the standard cementation technique. The samples were examined under a stereomicroscope at ×100 magnification following calibration. Linear measurements were performed at seven equidistant points on each axial surface and five equidistant points on each proximal surface. One-way ANOVA analysis and Tukey HSD (Honestly Significance Difference) were performed. The best marginal fit was seen in group 8, while the poorest fit was noted in group 2. Shoulder finish lines and 10° TOC resulted in higher marginal gaps, especially in CAD/CAM milled group. The selection of 3D-printed crowns may provide a better marginal fit within the range of clinical acceptability. Marginal gaps were within clinical acceptability (50 and 120 µm) in all groups except group 2. Full article
(This article belongs to the Special Issue Modern Polymers for Dental Application 2.0)
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15 pages, 3246 KiB  
Article
Effects of Smokeless Tobacco on Color Stability and Surface Roughness of 3D-Printed, CAD/CAM-Milled, and Conventional Denture Base Materials: An In Vitro Study
by Maryam H. Mugri, Saurabh Jain, Mohammed E. Sayed, Amjad Hussain Asiri Halawi, Safa Ahmed Ibrahim Hamzi, Raniya Abdulaziz Saad Aljohani, Zainab Mousa Ali Madkhali, Asaad Khalid, Hossam F. Jokhadar, Mai Almarzouki, Ghaida A. Alhumaidan, Ahid Amer Alshahrani, Saeed M. Alqahtani, Nasser M. Alqahtani and Honey Lunkad
Biomedicines 2023, 11(2), 491; https://doi.org/10.3390/biomedicines11020491 - 08 Feb 2023
Cited by 4 | Viewed by 3836
Abstract
Tobacco consumption in its different forms can affect the optical and surface properties of dental materials that are used in the oral cavity. Thus, the present study was conducted to evaluate the effects of two commercially available smokeless tobacco products on the color [...] Read more.
Tobacco consumption in its different forms can affect the optical and surface properties of dental materials that are used in the oral cavity. Thus, the present study was conducted to evaluate the effects of two commercially available smokeless tobacco products on the color stability and surface roughness of denture base resins that were fabricated using three different techniques (CAD/CAM milling, 3D printing, and conventional heat polymerization). A total of 126 denture base resin specimens were fabricated using the three different manufacturing techniques (n = 42 each). Specimens from each group were further subdivided into three subgroups (n = 14 each) and immersed in three different immersion media (a khaini suspension, a tabbaq suspension, and artificial saliva). The differences in color and surface roughness were assessed according to data that were collected and statistically analyzed using SPSS version 24.0. The tabbaq smokeless tobacco was found to cause greatest changes in color and surface roughness; the effect was observed to be highest in the 3D-printed specimens followed by the conventional heat-polymerized and CAD/CAM milled specimens. The mean changes in color and surface roughness were the highest for the tabbaq smokeless tobacco followed by the khaini smokeless tobacco and the artificial saliva. Statistically significant (p-value < 0.05) differences were observed among all techniques and suspensions. We concluded that the mean changes in color and surface roughness were significantly higher for the 3D-printed dentures compared to the conventional heat-polymerized and CAD/CAM-milled dentures. Thus, the results of the present study strengthened the concept that tobacco in any form can lead to changes in the color and surface roughness of denture base materials. Full article
(This article belongs to the Special Issue Modern Polymers for Dental Application 2.0)
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Review

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29 pages, 2566 KiB  
Review
Technological Aspects and Evaluation Methods for Polymer Matrices as Dental Drug Carriers
by Dorota Kida, Tomasz Konopka, Kamil Jurczyszyn and Bożena Karolewicz
Biomedicines 2023, 11(5), 1274; https://doi.org/10.3390/biomedicines11051274 - 25 Apr 2023
Cited by 2 | Viewed by 1702
Abstract
The development of polymer matrices as dental drug carriers takes into account the following technological aspects of the developed formulations: the composition and the technology used to manufacture them, which affect the properties of the carriers, as well as the testing methods for [...] Read more.
The development of polymer matrices as dental drug carriers takes into account the following technological aspects of the developed formulations: the composition and the technology used to manufacture them, which affect the properties of the carriers, as well as the testing methods for assessing their behavior at application sites. The first part of this paper characterizes the methods for fabricating dental drug carriers, i.e., the solvent-casting method (SCM), lyophilization method (LM), electrospinning (ES) and 3D printing (3DP), describing the selection of technological parameters and pointing out both the advantages of using the mentioned methods and their limitations. The second part of this paper describes testing methods to study the formulation properties, including their physical and chemical, pharmaceutical, biological and in vivo evaluation. Comprehensive in vitro evaluation of carrier properties permits optimization of formulation parameters to achieve prolonged retention time in the dynamic oral environment and is essential for explaining carrier behavior during clinical evaluation, consequently enabling the selection of the optimal formulation for oral application. Full article
(This article belongs to the Special Issue Modern Polymers for Dental Application 2.0)
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Other

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21 pages, 6358 KiB  
Systematic Review
In Search of Novel Degradation-Resistant Monomers for Adhesive Dentistry: A Systematic Review and Meta-Analysis
by Vlasta Mocharko, Paulo Mascarenhas, Ana Mano Azul and António H. S. Delgado
Biomedicines 2022, 10(12), 3104; https://doi.org/10.3390/biomedicines10123104 - 01 Dec 2022
Cited by 1 | Viewed by 1443
Abstract
This study aimed to assess whether degradation-resistant monomers included in experimental dental adhesives can improve long-term bond strength compared to conventional monomers. This study followed the latest PRISMA guidance (2020). The search for the systematic review was carried out in four electronic databases: [...] Read more.
This study aimed to assess whether degradation-resistant monomers included in experimental dental adhesives can improve long-term bond strength compared to conventional monomers. This study followed the latest PRISMA guidance (2020). The search for the systematic review was carried out in four electronic databases: PubMed/Medline, Scopus, SciELO and EMBASE, without restrictions on the year of publication and language. The last screening was conducted in July 2022. Interventions included were in vitro studies on experimental dental adhesives that tested short-term and long-term bond strength, but also water sorption and solubility data when available, in extracted human molars. Meta-analyses were performed using Rstudio v1.4.1106. A summary table analyzing the individual risk of bias was generated using the recent RoBDEMAT tool. Of the 177 potentially eligible studies, a total of 7 studies were included. Experimental monomers with acrylamides or methacrylamide–acrylamide hybrids in their composition showed better results of aged bond strength when compared to methacrylate controls (p < 0.05). The experimental monomers found better sorption and solubility compared to controls and were significantly different (p < 0.001). It is possible to achieve hydrolytically resistant formulations by adding novel experimental monomers, with chemical structures that bring benefit to degradation mechanisms. Full article
(This article belongs to the Special Issue Modern Polymers for Dental Application 2.0)
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