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Prosthodontics Dental Materials: Past-Present-Future
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Prosthodontics Dental Materials: Past-Present-Future

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

Deadline for manuscript submissions: closed (10 August 2023) | Viewed by 9322

Special Issue Editors

Prof. Dr. Wolf-Dieter Mueller

E-Mail Website
Guest Editor
Center for Dental and Craniofacial Sciences (CC3) Assmannshauser Str. 4-6, Charité Universitätsmedizin Berlin, D-14197 Berlin, Germany
Interests: dental materials, biomaterials, material characterization, corrosion; dental ceramics; PEEK; dental implants; CAD/CAM technologies; environmental dentistry
Special Issues, Collections and Topics in MDPI journals
Dr. Franziska Schmidt

E-Mail Website
Guest Editor
Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Aßmannshauser Str. 4-6, 14197 Berlin, Germany
Interests: dental materials; ceramics; biomaterials; 3D printing

Special Issue Information

Dear Colleagues,

Prosthetic dental materials include a very wide range of different valuable materials, including metals and alloys. Polymers with different bases have been tested, and acrylates have come to be used. These materials are adapted to their respective application. Ceramics, which were initially applied for aesthetic reasons as veneers for supporting metal frameworks, now have their own place in the dental care of patients. An important point here is the biocompatibility of the materials used, which must function in the patient's mouth for many years or even decades.

The development of modern industrial technologies has led to more information being made available about the possible uses of dental materials. Thus, CAD/CAM technologies are now used to produce dental restorations. It is possible that metallic structures can be substituted for by ZrO2 ceramics; now, they can be replaced by a high-performance polymer material, PEEK.

In addition, the need for the evaluation of the properties of these materials and their comparative testing, there is also the question of their sustainability.

Is the use of additive manufacturing preferable to subtractive manufacturing?

One question remains: what will happen next with joining techniques, soldering, LASER welding, and gluing?

Are these technologies still up to date?

To answer all these questions and problems addressed above, we invite you to be a part of this Special Issue.

Prof. Dr. Wolf-Dieter Mueller
Dr. Franziska Schmidt
Guest Editors

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Keywords

  • dental materials
  • alloys
  • ceramics
  • polymers
  • dental techniques
  • CAD/CAM
  • mechanical properties
  • biocompatibility

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Published Papers (3 papers)

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Research

15 pages, 18545 KiB  
Article
Bonding Performance of Surface-Treated Zirconia Cantilevered Resin-Bonded Fixed Dental Prostheses: In Vitro Evaluation and Finite Element Analysis
by Tine Malgaj, Roman Papšík, Anže Abram, Andraž Kocjan and Peter Jevnikar
Materials 2023, 16(7), 2646; https://doi.org/10.3390/ma16072646 - 27 Mar 2023
Cited by 3 | Viewed by 1917
Abstract
Debonding of zirconia cantilevered resin-bonded fixed dental prostheses (RBFDPs) remains the main treatment complication, therefore, the present in vitro study aimed to evaluate the effect of different surface pretreatments on the bonding of zirconia RBFDPs. Eighty milled zirconia maxillary central incisors, with complementary [...] Read more.
Debonding of zirconia cantilevered resin-bonded fixed dental prostheses (RBFDPs) remains the main treatment complication, therefore, the present in vitro study aimed to evaluate the effect of different surface pretreatments on the bonding of zirconia RBFDPs. Eighty milled zirconia maxillary central incisors, with complementary zirconia cantilevered RBFDPs, were randomly subjected to four different surface pretreatments (n = 20): as-machined (AM); airborne-particle abraded (APA); coated with nanostructured alumina coating (NAC); incisor air-abraded and RBFDP coated (NAC_APA). After bonding, half of each group (n = 10) was stored in deionized water (150 days/37 °C), thermocycled (37,500 cycles, 5–55 °C), and cyclically loaded (50 N/1.2 × 106). Load-bearing capacity (LBC) was determined using a quasi-static test. Additionally, finite element analysis (FEA) and fractography were performed. t-test and one-way ANOVA were used for statistical-analysis. Before aging, the NAC group provided superior LBC to other groups (p < 0.05). After aging, the AM specimens debonded spontaneously, while other groups exhibited comparable LBC (p ˃ 0.05). The FEA results correlated with the in vitro experiment and fractography, showing highly stressed areas in the bonding interface, cement layer, and in RBFDP’s retainer wing and connector. The NAC RBFDPs exhibited comparable long-term bonding performance to APA and should be regarded as a zirconia pretreatment alternative to APA. Full article
(This article belongs to the Special Issue Prosthodontics Dental Materials: Past-Present-Future)
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14 pages, 2152 KiB  
Article
Mechanical Properties of New Generations of Monolithic, Multi-Layered Zirconia
by Maria Bruhnke, Yasmin Awwad, Wolf-Dieter Müller, Florian Beuer and Franziska Schmidt
Materials 2023, 16(1), 276; https://doi.org/10.3390/ma16010276 - 28 Dec 2022
Cited by 8 | Viewed by 2941
Abstract
New monolithic multi-layered zirconia restorations are gaining popularity due to their excellent aesthetic properties. However, current knowledge of these newest multi-layer ceramics in terms of mechanical properties is scarce. Three monolithic, multi-layered zirconia materials (Katana, Kuraray Noritake, Japan) were selected for comparison: High [...] Read more.
New monolithic multi-layered zirconia restorations are gaining popularity due to their excellent aesthetic properties. However, current knowledge of these newest multi-layer ceramics in terms of mechanical properties is scarce. Three monolithic, multi-layered zirconia materials (Katana, Kuraray Noritake, Japan) were selected for comparison: High Translucent Multi-layered zirconia (HTML), Super Translucent Multi-layered zirconia (STML) and Ultra Translucent Multi-layered zirconia (UTML). Fifteen specimens per group were cut from pre-sintered blocs in each of the four layers (L1, L2, L3, L4) and in different thicknesses (0.4 mm, 0.8 mm and 1.2 mm). Critical fracture load (Fcf) was recorded in 3-point-bending. Flexural strength (σ) in MPa, Vickers hardness (HV) in N/mm2, fracture toughness (KIc) in MPa*m1/2, Weibull Modulus (m) and characteristic Weibull strength (σw) in MPa were assessed. Statistical analysis was performed using ANOVA analysis. FS and KIc were significantly higher (p < 0.05) for Katana™ HTML (652.85 ± 143.76–887.64 ± 118.95/4.25 ± 0.43–5.01 ± 0.81) in comparison to Katana™ STML (280.17 ± 83.41–435.95 ± 73.58/3.06 ± 0.27–3.84 ± 0.47) and UTML (258.25 ± 109.98–331.26 ± 56.86/2.35 ± 0.31–2.94 ± 0.33), with no significant differences between layers and layer thicknesses. The range of indications should be carefully considered when selecting the type of monolithic zirconia for fabrication of dental restorations, as materials widely differ in mechanical properties. Full article
(This article belongs to the Special Issue Prosthodontics Dental Materials: Past-Present-Future)
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7 pages, 1332 KiB  
Article
Additive Manufacturing of Lithium Disilicate with the LCM Process for Classic and Non-Prep Veneers: Preliminary Technical and Clinical Case Experience
by Alexey Unkovskiy, Florian Beuer, Dilan Seda Metin, Daniel Bomze, Jeremias Hey and Franziska Schmidt
Materials 2022, 15(17), 6034; https://doi.org/10.3390/ma15176034 - 1 Sep 2022
Cited by 20 | Viewed by 3336
Abstract
Background: ceramic veneers, crowns, and other types of restorations are often made using either the press heating technique or the subtractive method. The advent of lithography-based ceramic manufacturing (LCM) allows for the manufacturing of such restorations in an additive way. Methods: this concept [...] Read more.
Background: ceramic veneers, crowns, and other types of restorations are often made using either the press heating technique or the subtractive method. The advent of lithography-based ceramic manufacturing (LCM) allows for the manufacturing of such restorations in an additive way. Methods: this concept paper describes the first clinical experience in the application of LCM lithium disilicate restorations in vivo for the manufacturing of classic veneers for a patient with severe tooth wear. The applied restorations were analyzed in terms of their marginal fit in metrology software (Geomagic Control X, 3D Systems). Furthermore, the feasibility of 3D printing of non-prep veneers with a 0.1 mm thickness was tested. Results: the classic LCM lithium disilicate veneers were tried in the mouth cavity and demonstrated adequate esthetics and a sufficient marginal fit of 100 µm. Furthermore, the non-prep veneers with a 0.1 mm thickness could be successfully printed using LCM technology and also demonstrated an adequate fit on the model in vitro. Conclusions: the described technical approach of lithium disilicate 3D printing with LCM technology may pose a valid alternative to subtractive and analog manufacturing and be a game-changing option with the use of additive chairside ceramic fabrication. Full article
(This article belongs to the Special Issue Prosthodontics Dental Materials: Past-Present-Future)
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