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
Engineering, Mechanical
Asad Hameed, Ali Nawaz, Haris Ali Khan, Zahid Mehmood, Farooq Akram
Summary: This study analyzed a cylinder block assembly of an aircraft brake system that failed due to the formation of cracks. The analysis included experimental and numerical approaches to determine the fracture surfaces, microstructure, composition, and stress state. The results showed that the cracks originated from a sharp corner and were caused by stress concentration and cyclic loads.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Dentistry, Oral Surgery & Medicine
Chao Liu, Atilim Eser, Thomas Albrecht, Vasiliki Stournari, Monilza Felder, Siegward Heintze, Christoph Broeckmann
Summary: The Weibull modulus and characteristic strength of three dental ceramic materials in water were determined. The results showed that the polycrystalline yttria-stabilized zirconia had the highest Weibull modulus and strength, while glass ceramic materials had lower values. The subcritical crack growth parameters for the materials in water were also different, with a significant decrease in strength observed over time.
Article
Mechanics
Naoki Morita, Yousuke Mino, Nobuhiro Yoshikawa, Masahiro Hojo
Summary: A versatile methodology for fatigue strength prediction of unidirectional carbon fiber-reinforced plastic was proposed using a microscopic approach to evaluate stress, demonstrating the superiority of using interfacial normal stress for prediction over other stress criteria.
COMPOSITE STRUCTURES
(2021)
Article
Dentistry, Oral Surgery & Medicine
Ana Flavia Nunes Reis, Alexandre Luiz Souto Borges, Thais Cachute Paradella, Rita Adriana Souza da Silva de Assis, Luiz Felipe Valandro, Renata Marques de Melo
Summary: This study evaluated the effects of photo- and dual-polymerized resin-based luting agent on ultra-thin lithium disilicate (LD) glass-ceramic strengthening, structural reliability, and stress distribution. The results showed that the biaxial flexural strength and characteristic strength at the ceramic/resin cement interface were not influenced by the resin cement.
CLINICAL ORAL INVESTIGATIONS
(2023)
Article
Chemistry, Physical
Jae-Hyun Lee, Ho Yeol Jang, Su Young Lee
Summary: This study compared stress distributions in two restoration types of implants and the surrounding bone, finding that the cementless screw-retained zirconia crown with base abutment may be a superior option in terms of stress distribution compared to the conventional cement-retained zirconia crown.
Article
Engineering, Manufacturing
Sandeep Olhan, Sameer Kumar Behera, Vikas Khatkar, B. K. Behera
Summary: This study investigates the effect of different machinability processes and fibre architectures on the behavior, strength, and failure mechanism of textile fibre reinforced structural composites (TFRSC) suitable for automotive applications. Basalt fibre reinforced composites exhibited the highest bearing strength, and a mechanics-based approach using finite element modeling was successfully used to predict the bearing response of the composites.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Materials Science, Multidisciplinary
Bruno Mikio Fujiwara Marques, Thais Peres Zanetine Marques, Fernando de Azevedo Silva, Geraldo Mauricio Candido, Mirabel Cerqueira Rezende
Summary: The failure of polymer composites is complex, and the selection of failure criteria requires reasonable discernment. This study used finite element method to simulate a carbon/epoxy laminate subjected to tensile load and compared multiple failure criteria. Experimental tests and fractographic analysis were performed to validate the selected failure criteria.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Dentistry, Oral Surgery & Medicine
Fei Zhang, Mona Monzavi, Maoyin Li, Stevan C. Oki, Al Manesh, Hessam Nowzari, Jef Vleugels, Bart Van Meerbeek
Summary: This study analyzed the factors that may have led to fracture of zirconia implants through macro/micro-fractography. The results showed that the fracture of all implants seemed to have been primarily due to overload in bending mode, with different fracture-initiation sites for one-piece and two-piece implants. The study also highlighted the importance of considering multiple factors, including patient aspects, treatment planning/protocols, and specific implant designs, in the clinical failures of implants.
Article
Materials Science, Ceramics
Karthikeyan Ramachandran, Subhashree Leelavinodhan, Christian Antao, Antony Copti, Cantalapiedra Mauricio, Yelisetti Lakshmi Jyothi, Doni Daniel Jayaseelan
Summary: The failure mechanisms of Oxide-Oxide ceramic matrix composites AS-N610 were investigated in this study. The unnotched samples showed perfect elastic behavior at room temperature, while the notched samples exhibited pseudo-ductile behavior. The tensile strength of the composites decreased at high temperatures. Thermal shock experiments revealed a reduction in retained strength of the samples. Fracture origin was observed on the mid-plane of all samples, indicating higher fiber pull-out, delamination, and pseudo-ductile behavior. Finite element analysis confirmed stress concentration on the failure areas.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Dentistry, Oral Surgery & Medicine
Stevan M. Cokic, Mar Condor, Jef Vleugels, Bart Van Meerbeek, Hans Van Oosterwyck, Masanao Inokoshi, Fei Zhang
Summary: This study evaluated the composition, microstructure, optical properties, and mechanical properties of eight commercially available dental zirconias. The results showed that the chemical composition and grain size of the zirconia had an impact on its properties. Future research should focus on improving the optical properties and mechanical reliability of zirconia ceramics.
Article
Materials Science, Composites
Tao Zheng, Jinzhao Huang, Licheng Guo, Ruijian Sun, Tianlin Huang, Jindi Zhou, Fenghao Jia, Changqing Hong
Summary: This paper investigates the failure behaviors of 3D woven composites (3DWC) under biaxial tensile loadings through combined experimental and numerical approaches. The study first designs an appropriate biaxial cruciform specimen and conducts biaxial tensile experiments. The full-field strain distributions and crack morphologies of the specimens are then analyzed, and a multiscale damage model is proposed to simulate the biaxial failure behaviors of 3DWC, considering the micromechanics of failure theory.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Sina Ghaemi Khiavi, Bagher Mohammad Sadeghi, Mehdi Divandari
Summary: With the increasing development of additive manufacturing technology, lattice structures have emerged as a subset of cellular materials. In this research, PA12 lattice structures with different topologies were manufactured and tested under compression, with their mechanical properties and energy absorption analyzed. The results showed that lattice structures with different topologies exhibited different mechanical properties and energy absorption capabilities.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Frank W. DelRio, Scott J. Grutzik, William M. Mook, Sara M. Dickens, Paul G. Kotula, Eric D. Hintsala, Douglas D. Stauffer, Brad L. Boyce
Summary: In this letter, we demonstrated stable nanoscale fracture in single-crystal silicon and identified the shape of the crack-growth resistance curve, role of fabrication-induced artifacts, and origin of fracture surface features.
MATERIALS RESEARCH LETTERS
(2022)
Article
Materials Science, Coatings & Films
Rohan Chakrabarty, Jun Song
Summary: This study found that ceramic fragmentation and retention are influenced by particle grain sizes and impact velocities. A proposed optimum grain size range aims to reduce fragmentation and increase retention in metal-ceramic composite cold spraying. The beneficial role of surrounding metal particles on reducing fragmentation has been clarified and compared to experimental observations.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Allergy
Niels P. J. De Graaf, Roffel Sanne, Gibbs Sue, Cees J. Kleverlaan, Lopez Gonzalez Marta, Rustemeyer Thomas, Albert J. Feilzer, Hetty J. Bontkes
Summary: This study found that a broad spectrum of 33 cytokines and chemokines are involved in the immune response in patients with nickel allergy, and identified IL-5 as the strongest biomarker for nickel allergy.
CONTACT DERMATITIS
(2023)
Article
Dentistry, Oral Surgery & Medicine
Ivana Nedeljkovic, Behrouz Zandieh Doulabi, Marwa Abdelaziz, Albert J. Feilzer, Rob A. M. Exterkate, Slawomir Szafert, Nurbey Gulia, Ivo Krejci, Cornelis J. Kleverlaan
Summary: The cytotoxicity of a hybrid-glass-based infiltrant and its effect on biofilm attachment, growth, and metabolic activity were assessed and compared to a resin-based infiltrant. The results showed that the hybrid-glass-based infiltrant had minimal impact on cell viability and reduced bacterial attachment compared to the resin-based infiltrant.
Article
Dentistry, Oral Surgery & Medicine
Luiza Freitas Brum Souza, Lucas Saldanha da Rosa, Valentina Soares Menna Barreto, Vinicius Fogliato Ribeiro, Sara Fraga, Cornelis Johannes Kleverlaan, Luiz Felipe Valandro, Gabriel Kalil Rocha Pereira
Summary: This study characterized the effect of pigmentation techniques on the fatigue behavior of a 4YSZ ceramic bonded to a dentin analog. The results showed that pigmentation techniques did not have a significant influence on fatigue performance. However, the combination of brush pigmentation and post-sintering staining technique resulted in inferior fatigue performance compared to the staining technique alone. All failures originated from the ceramic intaglio surface, and the staining technique led to higher roughness.
Article
Dentistry, Oral Surgery & Medicine
Amanda Maria O. Dal Piva, Joao Paulo Mendes Tribst, Alexandre Luiz S. Borges, Cornelis J. Kleverlaan, Albert J. Feilzer
Summary: This study investigated the protective effect of mouthguards on veneered anterior restorations. The results showed that mouthguards reduce stress and the risk of fracture in dental trauma events regardless of the restorative material used. Higher stresses in veneered teeth with more rigid restorative materials lead to a less protective effect.
DENTAL TRAUMATOLOGY
(2023)
Article
Dentistry, Oral Surgery & Medicine
Joao Paulo M. Tribst, Qais Tach, Paul de Kok, Amanda Maria de O. Dal Piva, Ruud H. Kuijs, Cornelis J. Kleverlaan
Summary: Direct occlusal veneers made of conventional or flowable resin composites show promising mechanical behavior when bonded to enamel or dentin. Caution should be exercised when preparing restorations with a minimal thickness of 0.5 mm.
INTERNATIONAL DENTAL JOURNAL
(2022)
Article
Engineering, Biomedical
Andressa Borin Venturini, Kiara Serafini Dapieve, Paul de Kok, Gabriel Kalil Rocha Pereira, Luiz Felipe Valandro, Cornelis Johannes Kleverlaan
Summary: The aim of this study was to analyze the influence of the region (internal or external) of CAD/CAM blocks on the mechanical performance of restorative materials. Various CAD/CAM materials were selected, and resin composite blocks were built using the incremental technique. The blocks were sectioned into specimens and divided into two groups based on their region. Tests showed no significant difference in flexural strength between the internal and external regions, except for LULT and EMAX. Overall, the region from where the restoration is milled within the CAD/CAM block does not generally affect the mechanical performance of the material, except for LULT and EMAX.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Engineering, Biomedical
Lucas Saldanha da Rosa, Helder Callegaro Velho, Joao Paulo Mendes Tribst, Luiz Felipe Valandro, Cornelis Johannes Kleverlaan, Gabriel Kalil Rocha Pereira
Summary: The study evaluated the fatigue behavior of simplified anatomy lithium disilicate crowns under different cement/ceramic debonding scenarios. Load to failure tests and cyclic fatigue tests were conducted to determine the parameters. The results showed that compromised chemical adhesion leads to worsened fatigue behavior. Fractures mainly occurred in the occlusal portion due to stress concentration in the crown and cement layer.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Engineering, Biomedical
Kiara Serafini Dapieve, Helder Callegaro Velho, Lucas Saldanha da Rosa, Jordana Pavanelo Pivetta, Fernanda Cocco Maidana, Andressa Borin Venturini, Cornelis Johannes Kleverlaan, Gabriel Kalil Rocha Pereira, Luiz Felipe Valandro
Summary: This study aimed to evaluate the influence of ceramic surface treatments, resin cement viscosities, and storage regimens on the fatigue performance of bonded glass-ceramics. The results showed that the fatigue behavior of the ceramics was reduced after aging and the surface treatments and resin cement viscosities had a certain modulating effect on the fatigue performance. The relationships between ceramic microstructure, surface conditioning, and resin cement viscosity affected the fatigue performance of the glass-ceramics.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Review
Dentistry, Oral Surgery & Medicine
Kuebra Andas, Jessica Klockner Knorst, Clarissa Calil Bonifacio, Cornelis Kleverlaan, Daniela Hesse
Summary: This umbrella review comprehensively evaluated the use of compomers in restorative treatment of decayed primary teeth. Most studies found no difference in success rates between compomers and other dental filling materials. Therefore, multiple factors should be considered when choosing restorative materials.
JOURNAL OF DENTISTRY
(2023)
Article
Dentistry, Oral Surgery & Medicine
Luiza Freitas Brum Souza, Pablo Machado Soares, Vinicius Fogliato Ribeiro, Nicola Scotti, Cornelis Johannes Kleverlaan, Atais Bacchi, Gabriel Kalil Rocha Pereira
Summary: This in vitro study evaluated the influence of shading and staining techniques on the surface characteristics and color parameters of zirconia ceramic. The results showed that stained specimens had minimal color alterations after exposure, but polishing whitened the ceramic. Shaded specimens had significant color alterations after exposure, but polishing improved the color differences.
JOURNAL OF PROSTHETIC DENTISTRY
(2023)
Article
Engineering, Biomedical
Y. Lu, L. Wang, A. M. O. Dal Piva, J. P. M. Tribst, I. Nedeljkovic, C. J. Kleverlaan, A. J. Feilzer
Summary: This study evaluated the effect of surface finishing and printing layer orientation on the surface roughness and flexural strength of 3D-printed yttria-stabilized zirconia. The results showed that orienting the printed layers parallel to the tensile side improved the mechanical performance. Additionally, polishing significantly improved the flexural strength, and it is necessary to reduce surface roughness and large pores for optimal performance.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Dentistry, Oral Surgery & Medicine
Pablo Machado Soares, Lucas Saldanha da Rosa, Gabriel Kalil Rocha Pereira, Luiz Felipe Valandro, Marilia Pivetta Rippe, Amanda Maria de Oliveira Dal Piva, Albert J. Feilzer, Cornelis J. Kleverlaan, Joao Paulo Mendes Tribst
Summary: This study evaluated the mechanical behavior and risk of failure of three CAD-CAM crowns repaired with different resin composites. The results showed that the crown material affected the stress concentration and the shear bond strength, with repaired CAD-CAM resin composite crowns exhibiting better mechanical performance and lower risk of failure.
Article
Dentistry, Oral Surgery & Medicine
Y. Lu, A. M. O. Dal Piva, I Nedeljkovic, J. P. M. Tribst, A. J. Feilzer, C. J. Kleverlaan
Summary: The effects of glazing technique and firing on the surface roughness and flexural strength of an advanced lithium disilicate and lithium disilicate were investigated. Refiring completely closed the crack in the advanced lithium disilicate, while it had a limited effect on the lithium disilicate. Two-step crystallization and glazing improved the strength of the advanced lithium disilicate, but had a negative effect on the lithium disilicate.
CLINICAL ORAL INVESTIGATIONS
(2023)
Article
Dentistry, Oral Surgery & Medicine
Joao Paulo M. Tribst, Qais Tach, Paul de Kok, Amanda Maria de O. Dal Piva, Ruud H. Kuijs, Cornelis J. Kleverlaan
Summary: This study evaluated the fracture resistance and stress magnitude of occlusal veneers made of different resin composites at minimal thicknesses on enamel or dentin. The results showed that both materials performed similarly well in terms of fracture resistance and stress distribution, regardless of the substrate. However, caution is advised when preparing restorations with a minimal thickness of 0.5 mm.
INTERNATIONAL DENTAL JOURNAL
(2023)
Article
Dentistry, Oral Surgery & Medicine
Rene Daher, Ivo Krejci, Giovanni Tommaso Rocca, Enrico Di Bella, Cornelis J. Kleverlaan, Albert J. Feilzer, Stefano Ardu
Summary: This study evaluated the effect of light-curing exposure time and location on the polymerization of a restorative bulk-fill resin composite. The results showed that the minimum irradiation time to achieve adequate curing was 40 seconds x 2. There was no significant difference observed in microhardness between different curing locations and depths, except for the 10-second irradiation time.
AMERICAN JOURNAL OF DENTISTRY
(2022)