Article
Materials Science, Multidisciplinary
Rui Zhao, Chao Ma, Hongtian He, Daoyang Han, Hailong Wang, Rui Zhang, Linan An, Gang Shao
Summary: Flash treatment was proposed as a facile method to strengthen pre-densified zirconia ceramics, showing an improvement in flexural strength by introducing residual compressive stresses and dislocations to strengthen grains and introducing tensile stresses and defects to relatively weaken grain boundaries.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Biomedical
Perihan Oyar, Rukiye Durkan
Summary: The strength of zirconia ceramic materials in restorations depends on the sintering process. The study investigates the impact of sintering parameters on the biaxial flexural strength of monolithic zirconia. Results show that different sintering protocols and thermocycling have significant effects on the flexural strength of zirconia ceramics. Higher heating rates and longer holding times during sintering contribute to increased flexural strength.
BIOMEDICAL ENGINEERING-BIOMEDIZINISCHE TECHNIK
(2023)
Article
Dentistry, Oral Surgery & Medicine
Sebastian Spintzyk, Juergen Geis-Gerstorfer, Christoph Bourauel, Ludger Keilig, Ulrich Lohbauer, Annike Brune, Andreas Greuling, Christin Arnold, Stefan Rues, Ranko Adjiski, Tomofumi Sawada, Nina Luemkemann, Bogna Stawarczyk, Nicoleta Ilie, Roland Frankenberger, Marie-Christine Dudek, Monika Strickstrock, Sabine Begand
Summary: The interlaboratory round robin test aimed to verify the robustness of DIN EN ISO 6872:2019 and identify the influence of processing and testing variations. Results showed significant differences in flexural strength based on different preparation methods, with a certain degree of correlation between strength increase and surface roughness.
Article
Chemistry, Physical
Reem AlMutairi, Hend AlNahedh, Ahmed Maawadh, Ahmed Elhejazi
Summary: This study evaluated the biaxial flexural strength (BFS) and fractography of high/ultra-translucent monolithic zirconia ceramics after different mechanical surface pretreatments. The results showed that surface air abrasion with 50 mu m aluminum oxide particles and 2 bar pressure can improve the flexural strength of 3Y-TZP translucent zirconia, while no abrasion is needed for 5Y-ZP translucent zirconia.
Article
Engineering, Biomedical
Feng Wang, Yiran Shao, Congqin Ning
Summary: A ZrO2-Li2Si2O5 ceramic with minimized glass phases was successfully prepared through a sol-gel method and pressureless sintering. The study showed that the densification process of the ceramic was mainly dominated by the growth of Li2Si2O5 grains, and adjusting the Li2Si2O5 content and sintering temperature could control the properties of the samples effectively.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2022)
Article
Multidisciplinary Sciences
Koji Matsui, Kohei Hosoi, Bin Feng, Hidehiro Yoshida, Yuichi Ikuhara
Summary: The attainment of both high strength and toughness is the ultimate goal for most structural materials. Although ceramic materials have high strength and good chemical stability, they suffer from low toughness. Y-TZP-based ceramic materials with toughnesses exceeding 20 MPa m(1/2) and strengths over 1,200 MPa have been developed by reducing the phase stability of tetragonal zirconia through tailoring microstructure and chemistry, which can further advance the design and application of ceramic-based structural materials.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Dentistry, Oral Surgery & Medicine
Salma M. Fathy, Walid Al-Zordk, Mohammed E. Grawish, Micheal Swain
Summary: Recent improvements in monolithic zirconia with higher yttria content have shown significant enhancements in translucency and flexural strength. However, compared to glass ceramics, monolithic zirconia still lacks unique translucency and may sacrifice some mechanical performance while improving aesthetically. Careful consideration is needed when using thin sections of aesthetic zirconia structures, especially in high bearing stress areas.
Article
Materials Science, Ceramics
Betul Kafkaslioglu Yildiz, Yahya Kemal Tur
Summary: High flexural strength is crucial for a ceramic armor component to withstand high tensile stresses and multiple hits, as it helps protect the structural integrity. The study examined the effect of different ZrO2 content on the flexural strength of Al2O3-ZrO2 composites, and found that the composite with 20% ZrO2 had the highest strength.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Yibo Ren, Weiwei Zhu, Shuangshuang Pu, Yiyuan Chen, Yuanxun Shen, Ying Han, Xu Ran
Summary: This study investigated the crystallization, thermal expansion, and wetting behavior of ZAS glass, and used it to join MgAl2O4 ceramic. Additional nucleation and crystallization treatment improved the performance of the brazing seam.
CERAMICS INTERNATIONAL
(2023)
Article
Dentistry, Oral Surgery & Medicine
Alper Ozdogan, Hatice Ozdemir
Summary: Repeated firing can have a negative impact on the mechanical properties of lithium disilicate glass-ceramics, particularly on surface hardness and fracture toughness.
JOURNAL OF PROSTHETIC DENTISTRY
(2021)
Article
Chemistry, Physical
Jong-Eun Kim, Yong-Chan Kwon, Sunjai Kim, Young-Bum Park, June-Sung Shim, Hong-Seok Moon
Summary: The study evaluated the effects of acid mixture solution application time on the surface characteristics and mechanical properties of sintered and air-abraded 3Y-TZP. Acid treatment increased surface roughness but did not significantly affect the flexural strength of sintered zirconia. For air-abraded zirconia, the surface underwent sharp changes in phase and strength after air abrasion, but these changes gradually reversed after acid treatment.
Article
Chemistry, Multidisciplinary
Min-Su Kim, Min-Ho Hong, Bong-Ki Min, Young-Kyung Kim, Hyun-Jun Shin, Tae-Yub Kwon
Summary: The present study compared the microstructure, flexural strength, and fracture toughness of zirconia ceramics prepared via subtractive milling (SM) and stereolithography (SLA) methods. The analysis showed similar microstructures and phase compositions between the two ceramics, with no significant differences in flexural strength or fracture toughness.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Chemical
Marilia Pivetta Rippe, Renata Marques de Melo, Dayanne Monielle Duarte Moura, Pablo Soares Machado, Rodrigo Othavio Assuncao Souza, Luiz Felipe Valandro, Marco Antonio Bottino, Mutlu Oezcan
Summary: The number of specimens in the furnace affects flexural strength, with the optimal number being around five specimens for sintering at a time.
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
(2021)
Article
Dentistry, Oral Surgery & Medicine
Vanessa de Fatima Nogueira, Camila da Silva Rodrigues, Manasses Tercio Vieira Grangeiro, Lisseth Patricia Claudio Contreras, Renata Marques de Melo Marinho, Marco Antonio Bottino
Summary: This study evaluated the effect of different veneering ceramics and techniques on the bond strength to zirconia. The results showed that fusion ceramic technique provided the highest adhesion to zirconia when either feldspathic or lithium disilicate-based ceramics were used.
JOURNAL OF PROSTHODONTICS-IMPLANT ESTHETIC AND RECONSTRUCTIVE DENTISTRY
(2023)
Article
Materials Science, Multidisciplinary
Chuangang Yang, Weicong Wu, Zi Fu, Huade Zheng
Summary: This study proposes a method to prepare Yttria-stabilized tetragonal zirconia polycrystal ceramics (3Y-TZP ceramics) with complex triply periodic minimal surface (TPMS structures) using digital light processing (DLP) 3D printing technology for thermal insulation applications. The 3Y-TZP ceramics obtained had a relative density of 98.6%±0.2% and a flexural strength of 937±24 MPa when sintered at 1450°C for 3 hours. The diamond structure exhibited the lowest thermal conductivity of 0.93±0.035 W/(mK) and the highest compressive strength of 166.5±27.3 MPa at 67% porosity.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Dentistry, Oral Surgery & Medicine
Matthias Kelch, Bogna Stawarczyk, Felicitas Mayinger
Summary: The study investigated the properties of six dual-polymerizing resin composite luting materials before and after aging, finding that DUO and BIF demonstrated higher performance while CAL showed lower performance. VAR and DUO had the highest Weibull moduli. The choice of luting material is crucial for patients sensitive to toxicological issues, and DUO may be recommended for bonding fixed dental prostheses due to its superior properties.
CLINICAL ORAL INVESTIGATIONS
(2022)
Article
Dentistry, Oral Surgery & Medicine
Rebecca Jungbauer, Christian Kirschneck, Christian M. Hammer, Peter Proff, Daniel Edelhoff, Bogna Stawarczyk
Summary: The study aimed to investigate the shear bond strength between silicate ceramic restorations and ceramic brackets after different pretreatments and aging methods. The results showed that pretreatment with Monobond Etch&Prime led to the lowest SBS values, indicating the need for further research.
CLINICAL ORAL INVESTIGATIONS
(2022)
Article
Dentistry, Oral Surgery & Medicine
Felix Schmeiser, Fee Arbogast, Hendrik Ruppel, Felicitas Mayinger, Marcel Reymus, Bogna Stawarczyk
Summary: This study investigated the effects of crown geometry, crown/abutment/antagonist material, and thermal loading on the two-body wear of dental materials caused by chewing simulation. The results showed that crown geometry influenced the wear of crowns and antagonists, with an increased cusp inclination leading to increased wear. For in vitro setups, cobalt-chrome alloy abutments and resin composite antagonists were valid alternatives to natural teeth.
Article
Dentistry, Oral Surgery & Medicine
Xenia Anton, Anja Liebermann, Ruediger Hampe, Tim Joda, Bogna Stawarczyk
Summary: This study examined the effect of high-speed sintering and preshading on the fatigue behavior of 4Y-TZP ceramics. The multilayer technique showed a positive effect on the fatigue behavior of 4Y-TZP, while high-speed sintering negatively influenced the fatigue behavior of multilayer 4Y-TZP. However, the high-speed sintered material did not deteriorate compared to the conventionally sintered monochrome material.
JOURNAL OF PROSTHETIC DENTISTRY
(2023)
Article
Dentistry, Oral Surgery & Medicine
Felicitas Mayinger, Nina Lumkemann, Martyna Musik, Marlis Eichberger, Bogna Stawarczyk
Summary: The purpose of this study was to compare the mechanical properties of the newly developed lithium disilicate ceramic HS10PC with the established glass-ceramics IPS e.max Press and IPS Empress Esthetic. The results showed that HS10PC had comparable flexural strength, hardness, fracture load, and wear resistance to IPS e.max Press, and performed better than IPS Empress Esthetic.
JOURNAL OF PROSTHETIC DENTISTRY
(2022)
Article
Dentistry, Oral Surgery & Medicine
Daniel Edelhoff, Kurt-Juergen Erdelt, Bogna Stawarczyk, Anja Liebermann
Summary: Long-term failure rates of single-tooth restorations made of pressed LS2 were lower compared to those made of RC. Both materials can be recommended as permanent restorations for patients with severe tooth wear.
JOURNAL OF ESTHETIC AND RESTORATIVE DENTISTRY
(2023)
Article
Engineering, Biomedical
Veronika Greil, Felicitas Mayinger, Marcel Reymus, Bogna Stawarczyk
Summary: This study investigated the water sorption, water solubility, degree of conversion, elastic indentation modulus, edge chipping resistance and flexural strength of 3D-printed, milled and conventionally polymerized denture base resin materials. The results showed that most 3D-printed denture base resins had higher water sorption and water solubility, but also higher elastic indentation modulus and flexural strength. Only a few materials met the threshold values defined by the ISO norms for degree of conversion and flexural strength.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Dentistry, Oral Surgery & Medicine
Marcel Reymus, Anja Liebermann, Sebastian Spintzyk, Bogna Stawarczyk
Summary: The aim of this study was to investigate the discoloration and surface properties of four CAD/CAM composite resins after storage in different food solutions and exposure to cigarette smoke. The results showed that the storage medium had the greatest influence on discoloration, followed by the interaction between storage medium and material, and then the material itself. Carrot juice had the highest impact on color change, while distilled water had the lowest. The storage medium also had a significant effect on surface roughness, and manual polishing could not restore discoloration or surface roughness.
INTERNATIONAL JOURNAL OF PROSTHODONTICS
(2023)
Article
Chemistry, Physical
Valerie Lankes, Marcel Reymus, Felicitas Mayinger, Andrea Coldea, Anja Liebermann, Moritz Hoffmann, Bogna Stawarczyk
Summary: The present study investigated the effect of different cleaning methods and adhesives on the tensile bond strength between a resin-based composite and a temporary 3D printed resin. The results showed that regardless of the cleaning method, CUB, SUP, and VL can increase the bond strength between the 3D printed resin and the conventional luting resin.
Article
Dentistry, Oral Surgery & Medicine
Felicitas Mayinger, Marlis Eichberger, Lisa Marie Schoenhoff, Bogna Stawarczyk
Summary: The purpose of this study was to investigate the fracture loads of differently veneered and monolithic single-unit fixed dental prostheses (FDPs) made of a novel potential framework material, polyphenylene sulfone (PPSU). The results showed that the fracture loads of PPSU FDPs with different veneers were sufficient for clinical use.
INTERNATIONAL JOURNAL OF PROSTHODONTICS
(2023)
Article
Engineering, Biomedical
Ahmed Mahmoud Fouda, Bogna Stawarczyk, Mutlu Ozcan, Lamia Singer, Christoph Bourauel
Summary: This study evaluated the wear properties, fracture resistance, and optical properties of the newly introduced fully crystallized lithium disilicate (LDS) after glazing. The results demonstrated that the glazed fully crystallized LDS had better wear resistance compared to partially crystallized LDS, but showed more noticeable color changes than polished fully crystallized LDS. Polishing of fully crystallized LDS could still be considered a better option than glazing when aesthetics is a primary prerequisite.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Chemistry, Physical
Nina Luemkemann, Melisa Klimenta, Moritz Hoffmann, John Meinen, Bogna Stawarczyk
Summary: To test the impact of various factors on the dimensional stability of FFF models, including filaments, printing parameters, thermoforming foils, thermoforming cycles, and type of jaw, a study was conducted using two filaments and various printing parameters. The results showed that the printing parameters, thermoforming foil, and model type had the strongest influence on the dimensional stability of the models. Additionally, the dimensional stability of the FFF models decreased with increasing thermoforming cycles, unlike plaster models.
Article
Engineering, Biomedical
Veronika Geiger, Felicitas Mayinger, Moritz Hoffmann, Marcel Reymus, Bogna Stawarczyk
Summary: The study investigated the mechanical properties of four additively manufactured denture base resins in different measurement environments, and found that the measurement environment impacts the strength and fracture toughness of the materials.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2024)
Article
Engineering, Biomedical
Andrea Coldea, Mustafa Borga Donmez, Bogna Stawarczyk
Summary: This study evaluates the impact of firing temperature and heating rate on the properties of zirconia veneering ceramic. The results indicate that translucency, hardness, and fracture toughness are affected by the tested parameters, while shrinkage and flexural strength are not affected.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2024)
Article
Dentistry, Oral Surgery & Medicine
Matthias Kelch, Bogna Stawarczyk, Felicitas Mayinger
Summary: The objective of this study was to investigate the chemical and mechanical properties of four dual-polymerizing resin composite core build-up materials after light- and self-polymerization. The results showed that light-polymerization led to similar or superior values for the degree of conversion, Martens hardness, elastic indentation modulus, and biaxial flexural strength compared to self-polymerization. Among the tested materials, COR exhibited the highest chemical and mechanical properties and the highest reliability after light-polymerization. The examined chemical and mechanical properties showed a positive correlation.
CLINICAL ORAL INVESTIGATIONS
(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)