Article
Materials Science, Ceramics
Ming Zhou, Meng Meng, Zhiguo Chai, Yaming Zhang, Ding Li, Lina Niu, Yanmin Jia, Shaofeng Zhang, Fu Wang
Summary: This study investigated the dynamic wear behavior and fracture strength of high-translucent zirconia crowns after wear fatigue. The results showed that the wear volume increased with the wear cycles, with a high wear rate in the initial stage and a lower rate in the later stage. The fracture strength significantly decreased with an increase in fatigue cycles, except after 9 x 10(5) cycles. The worn surface exhibited flattened features with scattered cracks and small punctate defects.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Farayi Musharavati, Fadi Jaber, Mohamed Nasor, Masoud Sarraf, Erfan Zal Nezhad, Kaan Uzun, Ye Ma, Sungchul Bae, Ramesh Singh, Muhammad E. H. Chowdhury
Summary: This study investigated the mechanical properties, wettability, and tribology of hydroxyapatite-zirconia-carbon nanotube ceramic nanocomposites with different carbon nanotube ratios (1%, 5%, 10%). The results showed that the hardness of the materials increased with the addition of 1% and 5% carbon nanotubes, but decreased with the addition of 10% carbon nanotubes. In addition, the nanocomposite with 10% carbon nanotubes exhibited the highest hydrophilicity.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Rama A. Darwich, Manal Awad, Ensanya A. Abou Neel
Summary: This study evaluated the effect of different decontamination methods on the fracture resistance, microstructure, and surface roughness of monolithic and multilayered zirconia. The results showed that only phosphoric acid and low-speed dental stone significantly increased the flexural strength of sandblasted monolithic zirconia, while all the tested decontamination methods, except phosphoric acid and Al2O3, significantly increased the flexural strength of sandblasted multilayered zirconia. Different decontamination methods introduced irregularities and deep surface flaws in both types of zirconia. The low-speed dental stone was found to be beneficial in increasing the surface roughness and fracture resistance of both types of zirconia.
Article
Materials Science, Ceramics
Aleksandar Miletic, Peter Panjan, Miha Cekada, Lazar Kovacevic, Pal Terek, Janez Kovac, Goran Drazic, Branko Skoric
Summary: The CrAlN/TiSiN nanolayer coating demonstrates superior tribological performance and lower wear rate compared to the nanocomposite TiSiN coating, despite requiring a lower indentation load for fracture. The nanolayer coating also exhibits better overall performance compared to the nanocomposite TiSiN coating.
CERAMICS INTERNATIONAL
(2021)
Article
Dentistry, Oral Surgery & Medicine
Martin Rosentritt, Dirk Bollin, Michael Benno Schmidt, Angelika Rauch
Summary: This study investigated the stability and wear of tooth-supported zirconia single crowns with micro-layering in vitro. The results showed that the micro-layering technique provided good stability and wear performance, comparable to conventional ceramic veneering systems.
JOURNAL OF DENTISTRY
(2023)
Article
Engineering, Mechanical
Min Ji, Heng Zhang, Jinyang Xu, Chao Li, Dedong Yu, Ming Chen, Mohamed El Mansori
Summary: This study found that surface textures have a significant impact on the friction and wear behaviors of 3Y-TZP zirconia ceramics under different lubrication conditions, with different operating mechanisms.
Article
Dentistry, Oral Surgery & Medicine
Yong-Kyu Kim, Hyung-In Yoon, Dae-Joon Kim, Jung-Suk Han
Summary: This analysis evaluated the intaglio surface trueness, antagonist's wear volume loss, and fracture resistance of different types of zirconia crowns. The results showed that the intaglio surface trueness was less than 50μm for all groups, regardless of the zirconia type. There was no significant difference in wear volume loss among the groups, but both the zirconia type and aging had a significant effect on fracture resistance.
JOURNAL OF ADVANCED PROSTHODONTICS
(2022)
Article
Dentistry, Oral Surgery & Medicine
Joao Pitta, Felix Burkhardt, Mustapha Mekki, Vincent Fehmer, Philippe Mojon, Irena Sailer
Summary: This study evaluated the impact of different airborne-particle abrasion methods on the titanium base surface and retention forces between titanium bases and lithium disilicate crowns after thermomechanical aging. The results showed that airborne-particle abrasion increased bond stability and retention forces, with the use of 50-mu m Al2O3 providing the most stable bonded interface among the different treatments.
JOURNAL OF PROSTHETIC DENTISTRY
(2021)
Article
Engineering, Mechanical
Pablo Monreal, Neil Harrison, Eduardo Perez-Costarrosa, Miguel Zugasti, Alberto Madariaga, Isabel Claveria
Summary: Designing a friction material for brake systems requires considering the interactions between different constituents. A study on the resin-rubber ratio in brake block material showed that the progressive addition of resin heavily affects the friction level in dry and wet conditions. However, the use of 5% resin showed higher friction in wet conditions but also more severe metal pick-up. Furthermore, using only rubber as a binder provides instantaneous friction stability, but thermal cracks and delamination may occur. Therefore, a resin content of about 5% appears to be a good choice to maintain high friction in wet environments without incurring excessive wear rates.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2022)
Review
Dentistry, Oral Surgery & Medicine
Harald Laumbacher, Thomas Strasser, Helge Knuettel, Martin Rosentritt
Summary: Systematic reviews on prosthodontic zirconia restorations show satisfactory 5-year survival rates. The most common technical complication is veneering fractures, while the only aesthetic complication is color mismatch. Biological complications include caries, endodontic issues, tooth fractures, etc.
JOURNAL OF DENTISTRY
(2021)
Article
Engineering, Mechanical
Yusei Yamada, Motoyuki Murashima, Noritsugu Umehara, Takayuki Tokoroyama, Woo-Young Lee, Hajime Takamatsu, Yoshikazu Tanaka, Yoshiharu Utsumi
Summary: This study demonstrates the influence of fracture properties and surface morphology on the wear properties of diamond-like carbon (DLC) coatings. The results indicate that the wear rate of rough DLC coatings decreases with increasing fracture toughness, while that of smooth DLC coatings is independent of fracture toughness.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Chemistry, Physical
Yahui He, Shihong Zhang, Yi He, Ruxia Song, Zhifei Zhang, Bo Liu, Hongjie Li, Jianxin Shangguan
Summary: In this study, yttrium-stabilized zirconia (YSZ) with different yttrium (Y) content was co-deposited with Ni-P coatings using electroless plating. The effects of YSZ doping on the microstructure, phase structure, element valence, corrosion resistance, and wear resistance of the coatings were investigated. The results show that the increase in Y content in YSZ leads to enrichment of metal oxidation states on the coating surface. The presence of YSZ also enhances the crystalline diffraction and improves the corrosion resistance and wear resistance of the coatings.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Dentistry, Oral Surgery & Medicine
Sergio Giner, Jose F. Bartolome, Pablo Gomez-Cogolludo, Carlos Castellote, Guillermo Pradies
Summary: This study compared the fatigue life performance of ceramic CAD-CAM restorations supported by zirconia abutments with a titanium base versus titanium abutments supporting zirconia crowns. The results showed that restorations supported by zirconia abutments had higher fatigue fracture resistance compared to those supported by titanium abutments.
JOURNAL OF PROSTHETIC DENTISTRY
(2021)
Article
Dentistry, Oral Surgery & Medicine
Siyu Li, Xinyue Zhang, Wei Xia, Yihong Liu
Summary: The impact of different surface treatments and shades on high-translucency self-glazed zirconia materials is unclear. This study investigates the effects of various treatments on the color, translucency, and surface roughness of zirconia. It finds that the smoothest external polishing surface has the greatest translucency and color difference, and darker shades result in lower translucency. The study concludes that translucency is an important factor for evaluating dental ceramic color.
JOURNAL OF PROSTHETIC DENTISTRY
(2022)
Article
Chemistry, Physical
Seung-Han Kim, Mi-Yeon Yeo, Sun-Young Choi, Eun-Jin Park
Summary: This study evaluated the fracture resistance of monolithic zirconia crowns with limited marginal thickness in the posterior area. The results showed that crowns with a marginal thickness of 0.6 mm and 0.4 mm had significantly lower fracture resistance compared to those with a recommended margin thickness of 1.0 mm.
Article
Dentistry, Oral Surgery & Medicine
Marc Joos, Irena Sailer, Andreas Filippi, Khaled Mukaddam, Martin Rosentritt, Sebastian Kuhl
CLINICAL ORAL IMPLANTS RESEARCH
(2020)
Article
Dentistry, Oral Surgery & Medicine
Robert Bauer, Julian Zacher, Thomas Strasser, Martin Rosentritt
Summary: The study evaluated the performance and fracture load of resin anterior implant-supported interim fixed partial dentures (IFPDs), finding that these interim materials are sufficiently fracture resistant for the fabrication of implant-supported anterior IFPDs, expected to survive between 6 months and 2 years before failure. The stability of IFPDs depended on the type of material but not on the restoration design.
JOURNAL OF PROSTHETIC DENTISTRY
(2021)
Article
Engineering, Biomedical
Martin Rosentritt, Michael Behr, Thomas Strasser, Alois Schmid
Summary: The study aimed to establish a splint testing method and compare the insertion and removal performance of dental splints in-vitro. Results showed significant differences in insertion/pull-off cycles between different materials, with deep-drawn, cast, and combined systems performing better compared to printed or milled splints.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Dentistry, Oral Surgery & Medicine
Verena Hickl, Thomas Strasser, Alois Schmid, Martin Rosentritt
Summary: The study investigated the color, gloss, and roughness changes of splint materials after storage in liquids and toothbrush simulation. The results showed that contact with staining solutions/toothbrush simulation altered the color, gloss, and roughness. The material and storage time had the most significant impact on these changes. Storage and toothbrushing resulted in visible discoloration and decreased gloss values of the splint materials.
CLINICAL ORAL INVESTIGATIONS
(2022)
Article
Dentistry, Oral Surgery & Medicine
Martin Rosentritt, Christina Huber, Thomas Strasser, Alois Schmid
Summary: The study focused on testing experimental rapid prototyping materials for occlusal splints made from Urethandimethacrylate (UDMA) and Urethanmethacrylate (UMA). Mechanical properties were significantly influenced by changes in the UDMA:UMA ratio, with increased amounts of UMA correlating with a decrease in flexural strength, modulus of elasticity, hardness, and wear resistance. Optic properties showed minor influence from UMA content and aging, while gloss was partly influenced by the UDMA:UMA ratio and water storage. Mean survival rates for cyclic pull-off and insertion testing ranged from 2537 to 23,857 cycles, with a correlation observed between the amount of UMA and survival rates. The addition of up to 25% UMA showed promising results, complying with clinical standards and delivering acceptable results in the cyclic pull-off and insertion test.
Article
Engineering, Biomedical
Johann Wulff, Alois Schmid, Christina Huber, Martin Rosentritt
Summary: The study found that the number of loading cycles that additively manufactured splint specimens can withstand depends on the type of material, cleaning, and post-polymerisation. Therefore, the materials, cleaning, and post-polymerisation of additive manufacturing processes should be matched to improve the dynamic loading performance of splint materials.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Martin Rosentritt, Sebastian Hahnel, Sibylle Schneider-Feyrer, Thomas Strasser, Alois Schmid
Summary: The study analyzed the differences in hardness and energy-converting properties of CAD/CAM resin-based composites using instrumented indentation testing. Significant differences were found between the materials, indicating that some materials may have superior stress-breaking capabilities.
APPLIED SCIENCES-BASEL
(2022)
Article
Medicine, General & Internal
Max L. Poeppel, Martin Rosentritt, Richard Sturm, Florian Beuer, Jeremias Hey, Alois Schmid, Franziska Schmidt
Summary: The study shows that color-gradient multilayer zirconia materials and new strength-gradient zirconia materials with similar yttria levels in the basal layers exhibit comparable mechanical properties and are suitable for anterior FDPs.
JOURNAL OF CLINICAL MEDICINE
(2022)
Article
Dentistry, Oral Surgery & Medicine
Karin Schnitzhofer, Angelika Rauch, Michael Schmidt, Martin Rosentritt
Summary: This study investigated the impact of occlusal contact situation and occlusal adjustment on wear, roughness, and fracture force of molar crowns. The results showed that resin composite crowns had higher wear area and depth, as well as lower fracture forces. Adjusted crowns exhibited increased wear areas and depths. For zirconia crowns, the adjustment resulted in greater wear area and depth, as well as lower fracture forces. These findings emphasize the importance of adapting occlusal design and adjustment to improve the performance and stability of zirconia and resin composite crowns.
JOURNAL OF DENTISTRY
(2023)
Article
Dentistry, Oral Surgery & Medicine
Thomas Strasser, Markus Wertz, Andreas Koenig, Torsten Koetzsch, Martin Rosentritt
Summary: The objective of this study was to compare the composition, microstructure, and mechanical strength of current multilayer zirconia blanks. Bar-shaped specimens were made from different multilayer zirconia blanks, and the microstructure and crystal structure were analyzed using scanning electron microscopy and X-ray diffraction. The results showed significant differences in flexural strength and grain size between the different layers. The findings suggest that the milling position in the blanks should be considered when using multilayer zirconia as a restorative material.
Article
Engineering, Biomedical
Martin Rosentritt, Angelika Rauch, Sebastian Hahnel, Michael Schmidt
Summary: The purpose of this study was to compare the in-vitro performance and wear behavior of additively or subtractively fabricated resin-based composite molar crowns for temporary and permanent application. The results showed that both temporary and permanent molar crowns, regardless of whether they were additively or subtractively manufactured, provided acceptable in-vitro performance and wear stability.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Chemistry, Physical
Joerg Baechle, Cordula Merle, Sebastian Hahnel, Martin Rosentritt
Summary: The microbiological behavior of dental polymer materials is crucial to ensure the success of dental restorations. This study investigated the adhesion of bacteria on dental polymers as a function of manufacturing techniques and different polishing protocols. The results showed that surface roughness and polishing significantly influenced bacterial adhesion, with horizontally printed materials showing less adhesion compared to vertically printed ones.
Article
Dentistry, Oral Surgery & Medicine
Martin Rosentritt, Dirk Bollin, Michael Benno Schmidt, Angelika Rauch
Summary: This study investigated the stability and wear of tooth-supported zirconia single crowns with micro-layering in vitro. The results showed that the micro-layering technique provided good stability and wear performance, comparable to conventional ceramic veneering systems.
JOURNAL OF DENTISTRY
(2023)
Article
Medicine, General & Internal
Angelika Rauch, Wendy Heinzmann, Martin Rosentritt, Sebastian Hahnel, Michael Benno Schmidt, Florian Fuchs, Andreas Koenig
Summary: This study aimed to investigate the in-vitro aging and fracture resistance of implant-supported molar crowns (iSCs) with a CAD/CAM resin composite veneer structure. The results showed that the choice of framework material significantly influenced the fracture resistance, while the choice of veneering material did not have a significant impact.
JOURNAL OF CLINICAL MEDICINE
(2023)
Article
Materials Science, Ceramics
Thomas Strasser, Alois Schmid, Christina Huber, Martin Rosentritt
Summary: This study investigated the in vitro performance of 4-unit fixed partial dentures (FPDs) made from different types of zirconia blanks. The results showed that the positioning within multilayer blanks had a slight effect on the fracture force. The study suggests that multilayer, 3Y-TZP-A, 3Y-TZP, and 4Y-TZP are suitable for clinical applications of 4-unit molar FPDs, while the use of 5Y-TZP may be problematic.
CERAMICS-SWITZERLAND
(2022)
Article
Dentistry, Oral Surgery & Medicine
Chang Zeng, Pei Hu, Colin P. Egan, Brian E. Bergeron, Franklin Tay, Jingzhi Ma
Summary: The study compared the bacteria debridement efficacy of the first and second generations of sonic root canal irrigant activation systems. The results showed that activation of 2% NaOCl with either EndoActivator or SmartLite Pro EndoActivator significantly reduced the overall intracanal bacterial load compared to syringe-side-vented needle delivery. However, delivering 2% NaOCl for 5 minutes using the syringe-side-vented needle produced better bacteria debridement than either sonic agitation system.
JOURNAL OF DENTISTRY
(2024)
Article
Dentistry, Oral Surgery & Medicine
Alaa Husni Qari, Raghad Mohammed Alharbi, Shahd Saud Alomiri, Banan Nasser Alandanusi, Lina Ayman Mirza, Mohammad Hasan Al-Harthy
Summary: The study compares the experience of patients seen using teledentistry with traditional Orofacial Pain and TMD visits. Results indicated a borderline difference in effectively using teledentistry for follow-ups among different age groups, but no significant differences were found in patients' experience between virtual and conventional visits. This suggests that high-quality dental care services can be provided remotely without adversely affecting patient experience or quality of care.
JOURNAL OF DENTISTRY
(2024)
Article
Dentistry, Oral Surgery & Medicine
Giovanna Iezzi, Barbara Zavan, Morena Petrini, Letizia Ferroni, Tania Vanessa Pierfelice, Ugo D'Amora, Alfredo Ronca, Emira D'Amico, Carlo Mangano
Summary: This study characterized the surface topography and evaluated the biological responses of various cells to a novel 3D-printed dental implant. The surface of the implant showed a highly interconnected porous architecture and roughness, leading to good adhesion and growth of human oral osteoblasts, gingival fibroblasts, mesenchymal stem cells, and monocytes. These findings suggest that this 3D-printed implant has excellent potential for clinical applications.
JOURNAL OF DENTISTRY
(2024)
