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Latest Materials and Technologies in Dentistry

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

Deadline for manuscript submissions: 20 December 2024 | Viewed by 1569

Special Issue Editors


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Guest Editor
Department of Oral and Maxillo-Facial Sciences, “Sapienza”, University of Rome, 00185 Rome, Italy
Interests: prosthodontics; oral surgery; implantology; digital dentistry
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Oral and Maxillo-Facial Sciences, “Sapienza”, University of Rome, 00185 Rome, Italy
Interests: oral surgery; maxillofacial surgery; implantology; periodontology; endodontic microsurgery
Special Issues, Collections and Topics in MDPI journals

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Guest Editor Assistant
Department of Oral and Maxillo-Facial Sciences, “Sapienza”, University of Rome, 00185 Rome, Italy
Interests: endodontics; restorative dentistry; dental materials

Special Issue Information

Dear Colleagues,

All the fields of modern dentistry have been revolutionized by the introduction of new materials and the application of new technologies. Intraoral scanners are widely used in the fields of prosthodontics, implantology and orthodontics, increasing patient acceptance and reducing the operative time. New types of glass ceramics and polycrystalline ceramics with improved mechanical and aesthetic properties are spreading the use of monolithic restorations both on teeth and implants. A variety of planning software in orthodontics and implantology are allowing the clinicians to previsualize the operative steps and properly determine the treatment plan with an always greater patient customization. New endodontic instruments alloys, irrigant activation systems and cements are simplifying the endodontic treatments, thus reducing the operative time. The introduction of new advancements and technologies in dentistry necessitates constant research and updates in all the branches of dentistry.

This Special Issue intends to cover all the basic and clinical research facing the abovementioned topics.

Dr. Lorenzo Arcuri
Prof. Dr. Massimo Galli
Guest Editors
Dr. Francesca Romana Federici
Guest Editor Assistant

Manuscript Submission Information

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Keywords

  • new technologies
  • dental materials
  • digital dentistry
  • implantology
  • endodontics
  • prosthodontics
  • oral surgery
  • orthodontics
  • restorative dentistry

Published Papers (2 papers)

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Research

11 pages, 808 KiB  
Article
Biaxial Flexural Strength of Printed Splint Materials
by Johann Wulff, Angelika Rauch, Michael Benno Schmidt and Martin Rosentritt
Materials 2024, 17(5), 1112; https://doi.org/10.3390/ma17051112 - 28 Feb 2024
Viewed by 558
Abstract
One therapeutical alternative in the treatment of functional disorders is the use of printed oral splints. The mechanical properties of these materials are highly essential to their clinical effectiveness, and their performance may vary depending on factors such as cleaning, post-polymerization, or their [...] Read more.
One therapeutical alternative in the treatment of functional disorders is the use of printed oral splints. The mechanical properties of these materials are highly essential to their clinical effectiveness, and their performance may vary depending on factors such as cleaning, post-polymerization, or their orientation during construction. The objective of this in vitro investigation is to evaluate the effectiveness of the selected materials in terms of their biaxial flexural strength in relation to the criteria listed above. Splint materials were used in the printing of 720 discs. The printing process was carried out in different orientations in relation to the building platform. Either an automatic or manual cleaning process was performed on the samples. For post-polymerization, either an LED or Xenon light was utilized. A piston-on-three-ball test was used to measure the biaxial flexural strength (BFS) of the materials after they were stored in water for either 24 h or 60 days. The homogeneity of the data was controlled by employing the Levene method, and the differences between the groups were analyzed using the ANOVA and Bonferroni methods. After being stored for twenty-four hours, the mean BFS ranged anywhere from 79 MPa to 157 MPa. Following a period of sixty hours, the BFS exhibited a substantial drop and revealed values that ranged from 72 to 127 MPa. There was no significant difference that could be identified between the materials or between the various cleaning processes. The results of post-polymerization showed that the LED light produced higher means than the Xenon light did. In terms of position, the mean values varied greatly, with 0°’s mean value being 101 MPa, 45°’s mean value being 102 MPa, and 90°’s mean value being 115 MPa. The use of a build orientation of 90° and post-polymerization with LED light resulted in significantly increased biaxial flexural strength. According to this study, this design should be implemented in order to ensure that splint materials have the highest possible strength. Full article
(This article belongs to the Special Issue Latest Materials and Technologies in Dentistry)
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15 pages, 4590 KiB  
Article
The Effect of Sintering on Zirconia Manufactured via Suspension-Enclosing Projection Stereolithography for Dental Applications: An In Vitro Study
by Amit Unnadkat, Levi Kirby, Senthilguru Kulanthaivel, Oscar Rysavy, Akimasa Tsujimoto, Xuan Song and Erica C. Teixeira
Materials 2024, 17(1), 14; https://doi.org/10.3390/ma17010014 - 19 Dec 2023
Viewed by 766
Abstract
Background: Zirconia is a widely used material in the dental industry due to its excellent mechanical and aesthetic properties. Recently, a new 3D printing process called suspension-enclosing projection stereolithography (SEPS) was introduced to fabricate zirconia dental restorations. However, the effect of the sintering [...] Read more.
Background: Zirconia is a widely used material in the dental industry due to its excellent mechanical and aesthetic properties. Recently, a new 3D printing process called suspension-enclosing projection stereolithography (SEPS) was introduced to fabricate zirconia dental restorations. However, the effect of the sintering time and temperature on the properties of zirconia produced via SEPS has not been fully investigated. Methods: Zirconia slurries were prepared with varying percentages of zirconia powders and 3D printing resins, and 5Y-TZP (5 mol% yttria-stabilized zirconia) (n = 40) and 3Y-TZP (3 mol% yttria-stabilized zirconia) (n = 40) bar specimens were fabricated via SEPS manufacturing. The specimens were sintered at different temperatures and dwell times, and their flexural strength, density, and phase composition were measured. The viscosity of the slurries was also measured. Statistical analysis was performed using Welch’s ANOVA and Kruskal–Wallis tests to evaluate the impact of the sintering conditions. Results: Significant differences in flexural strength (p < 0.01) were observed between the 5Y-TZP samples, with those sintered at 1530 °C for 120 min showing an average strength of 268.34 ± 44.66 MPa, compared to 174.16 ± 42.29 MPa for those sintered at 1450 °C for 120 min. In terms of density, significant differences (p < 0.01) were noted for the 3Y-TZP specimens, with an average density of 6.66 ± 0.49 g/cm3 for samples sintered at 1530 °C for 120 min, versus 5.75 ± 0.55 g/cm3 for those sintered at 1530 °C for 10 min. X-ray diffraction confirmed the presence of a predominantly tetragonal phase in both materials. Conclusions: Zirconia printed via SEPS manufacturing can be sintered at a higher temperature with shorter dwell times, thereby producing high density samples. Different sintering conditions can be used to fully sinter 3D-printed zirconia for potential dental applications. Full article
(This article belongs to the Special Issue Latest Materials and Technologies in Dentistry)
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