Article
Dentistry, Oral Surgery & Medicine
John Yun Niu, Iris Xiaoxue Yin, William Ka Kei Wu, Quan-Li Li, May Lei Mei, Chun Hung Chu
Summary: The dual-action peptide GA-KR12 showed antibiofilm effects by inhibiting the growth of Streptococcus mutans biofilm, and also demonstrated remineralising effects by promoting the remineralisation of enamel caries. The mineral losses and calcium-to-phosphorus ratios were significantly lower in the GA-KR12-treated group compared to the control group, indicating the potential of GA-KR12 in preventing enamel caries and promoting enamel remineralisation.
CLINICAL ORAL INVESTIGATIONS
(2022)
Article
Multidisciplinary Sciences
Enrico Salvati, Cyril Besnard, Robert A. Harper, Thomas Moxham, Richard M. Shelton, Gabriel Landini, Alexander M. Korsunsky
Summary: This study presents a simplified calculation framework for numerical simulation of the demineralisation process at the length scale of enamel rods, validated by experimental data. It explores the impact of etchant solution pH levels and etching angles on the demineralisation process. The study aims to pave the way for simulations of enamel demineralisation in different scenarios and length scales.
JOURNAL OF ADVANCED RESEARCH
(2021)
Article
Engineering, Biomedical
Robert A. Harper, Richard M. Shelton, Jonathan D. James, Enrico Salvati, Cyril Besnard, Alexander M. Korsunsky, Gabriel Landini
Summary: This study utilized in situ microradiography and polarised light microscopy to investigate the progression of enamel demineralisation under different acidic conditions and the impact of intrinsic enamel structure and pH on demineralisation kinetics. The findings provide insights into the relationship between enamel structure, pH, and mineral loss dynamics, which can contribute to the development of improved anti-demineralisation/remineralisation treatments.
ACTA BIOMATERIALIA
(2021)
Article
Dentistry, Oral Surgery & Medicine
Haoran Chen, Robert Hill, Aylin Baysan
Summary: This study investigated the effect of different toothpastes containing 5,000ppm-F, 1,450ppm-F or bioactive glass (BG) with 540ppm-F on artificial root carious lesions. The toothpaste containing BG released more ions (Ca2+ and P) and rehardened the lesions, indicating potential clinical significance.
JOURNAL OF DENTISTRY
(2023)
Article
Dentistry, Oral Surgery & Medicine
Polyvios Charalambous, Saoirse O'Toole, Thomas Bull, David Bartlett, Rupert Austin
Summary: This study investigated the measurement threshold of an intraoral scanner on polished human enamel, revealing a threshold of 44 micrometers for accurate measurements. The results showed no significant differences in enamel lesion measurements between the non-contacting laser profilometer and the intraoral scanner above this threshold.
Article
Chemistry, Physical
Christabel E. Fowler, Jonathan E. Creeth, Alan J. Paul, Clare Carson, Gebremedhin Tadesse, Alan Brown
Summary: The fluoride-based dentifrice (NaF/CL) showed the highest protection against dental erosion and had the highest fluoride and Ca-44 uptake compared to other commercial dentifrices containing different fluoride salts and/or fluoride-inhibiting ingredients.
SURFACE AND INTERFACE ANALYSIS
(2021)
Article
Medicine, General & Internal
Rikki Deswal, Navneet Kukreja, Swati Chhabra, Shivangi Trivedi, Ankita Sharma, Anamika Thakur
Summary: This study aimed to compare and evaluate the remineralizing efficiency of Remin Pro, tricalcium phosphate, and HealOzone on enamel. The results showed that all three remineralizing agents significantly improved the remineralization of enamel compared to the control group.
CUREUS JOURNAL OF MEDICAL SCIENCE
(2022)
Article
Polymer Science
Ali Azhar Dawasaz, Rafi Ahmad Togoo, Zuliani Mahmood, Ahmad Azlina, Kannan Thirumulu Ponnuraj
Summary: Due to limitations of fluoride therapy in dental caries prevention, newer preventive agents like P11-4 peptide have been developed. P11-4 peptide can facilitate biomimetic remineralisation and has a positive effect on early carious lesions. However, better results can be achieved when it is combined with other agents.
Article
Materials Science, Ceramics
Fernando Rodriguez-Rojas, Oscar Borrero-Lopez, Estibaliz Sanchez-Gonzalez, Fernando Guiberteau
Summary: This study compared two engineering methodological approaches for investigating dental enamel/ceramic tribosystems and analyzed differences in wear rate measurements. The study discussed the impact of different methods on wear effects and highlighted the importance of judicious selection of test methods and interpretation of experimental wear results.
CERAMICS INTERNATIONAL
(2022)
Review
Medicine, General & Internal
Manuel Leon Velastegui, Jose Maria Montiel-Company, Ruben Agustin-Panadero, Carla Fons-Badal, Maria Fernanda Sola-Ruiz
Summary: This study evaluated wear of the antagonist tooth in ceramic restorations, finding that feldspathic ceramic caused the greatest wear, while zirconia caused the least wear which decreased over time and became equal to or less than the natural wear in the tooth.
JOURNAL OF CLINICAL MEDICINE
(2022)
Article
Medicine, General & Internal
Saqib Ali, Imran Farooq, Amr Bugshan, Intisar Ahmad Siddiqui, Khalifa S. Al-Khalifa, Mohammed Al-Hariri
Summary: The study found that brushing enamel blocks with propolis oil led to a significant improvement in microhardness compared to brushing with artificial saliva. Both inter-group and intra-group comparisons showed statistically significant differences in Vickers hardness numbers (VHN), suggesting the potential benefits of propolis in enhancing enamel remineralisation. Further research is needed to explore the exact mechanisms behind the positive effects of propolis on enamel.
JOURNAL OF TAIBAH UNIVERSITY MEDICAL SCIENCES
(2021)
Article
Materials Science, Ceramics
Wenjie Li, Jun Chen, Zhuan Li, Jiong Zhao, Zhuo Chen, Fu Chen, Yanqin Lu
Summary: The present study aimed to evaluate the wear behavior of BT modified 3Y-TZP ceramic composites compared to commercially available 3Y-TZP products. 3D digital microscopy, SEM, and STEM analyses revealed the underlining mechanisms. The 5 mol% BT/3Y-TZP showed the best wear properties and formed a stable transfer enamel layer, making it a potential material for restorative dentistry.
CERAMICS INTERNATIONAL
(2023)
Article
Dentistry, Oral Surgery & Medicine
Chunxiao Jin, Jiuhong Deng, Peiyue Pan, Yuhuan Xiong, Liqing Zhu, Shanshan Gao
Summary: This study compared the impact-sliding wear of different CAD/CAM resin-ceramic materials and tooth enamel, and explored the corresponding wear damage mechanism. The results showed that enamel and polymer-infiltrated ceramic network materials exhibited similar wear damage modes, and the high-density nanocomposite resin material was the most resistant to impact-sliding wear from a tribological perspective.
Article
Multidisciplinary Sciences
Bhavika Bhavsar, Mary Vijo, Pranjely Sharma, Tulika Patnaik, Mohammad Khursheed Alam, Santosh Patil
Summary: This study compared the effects of two remineralising materials containing casein phosphopeptide-amorphous calcium phosphate and bioactive glass on enamel surface microhardness. The results showed that both remineralising agents significantly improved the surface microhardness. Although group 2 had a higher hardness value than group 3, there was no statistically significant difference between the two groups.
Article
Materials Science, Multidisciplinary
Cyril Besnard, Robert A. Harper, Thomas E. J. Moxham, Jonathan D. James, Malte Storm, Enrico Salvati, Gabriel Landini, Richard M. Shelton, Alexander M. Korsunsky
Summary: This study reports significant advances in analyzing synchrotron 3D datasets of human dental enamel, highlighting the differences in structural features between healthy and carious enamel. The study demonstrates a new method for studying dental lesions and their potential applications.
MATERIALS TODAY COMMUNICATIONS
(2021)
Correction
Engineering, Biomedical
Yun-Qi Wu, Joseph A. Arsecularatne, Mark Hoffman
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Sophia Esslinger, Peter Neumeister, Andreas Schoenecker, Mark Hoffman, Andrew Studer, Manuel Hinterstein
ADVANCED ENGINEERING MATERIALS
(2019)
Article
Materials Science, Ceramics
Nitish Kumar, Xi Shi, Jacob Jones, Mark Hoffman
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2019)
Article
Chemistry, Physical
Kai-Yang Lee, Xi Shi, Nitish Kumar, Mark Hoffman, Martin Etter, Stefano Checchia, Jens Winter, Lucas Lemos da Silva, Daniela Seifert, Manuel Hinterstein
Article
Physics, Applied
Kai-Yang Lee, Xi Shi, Nitish Kumar, Mark Hoffman, Martin Etter, Jens Winter, Lucas Lemos da Silva, Daniela Seifert, Manuel Hinterstein
APPLIED PHYSICS LETTERS
(2020)
Article
Physics, Applied
Xi Shi, Nitish Kumar, Mark Hoffman
APPLIED PHYSICS LETTERS
(2020)
Article
Materials Science, Ceramics
Nitish Kumar, Xi Shi, Mark Hoffman
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2020)
Article
Engineering, Mechanical
Joseph A. Arsecularatne, Elena Colusso, Enrico Della Gaspera, Alessandro Martucci, Mark J. Hoffman
TRIBOLOGY INTERNATIONAL
(2020)
Article
Engineering, Biomedical
Ampaiphan Atthapreyangkul, Mark Hoffman, Garth Pearce
Summary: Multi-scale finite element analysis was conducted to investigate the impact of geometrical changes on the mechanical properties of cortical bone at different structural scales. The study incorporated statistical approaches and sensitivity analyses, revealing an exponential correlation between mineral volume fraction and effective stiffness constants at each length scale. Fast and slow response relaxation behavior of cortical bone was found to be influenced by bone's structural anisotropy and global mineral volume fraction variations between length scales.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Materials Science, Ceramics
Xi Shi, Nitish Kumar, Jacob L. Jones, Mark Hoffman
Summary: The fracture properties of 0.94(Na0.5Bi0.5)TiO3-0.06BaTiO(3) relaxor ferroelectrics were investigated using the Vickers indentation method and crack tip opening displacement calculation. It was found that unpoled and poled samples exhibited different fracture toughness, with crack growth influenced by residual stress and electromechanical strain. The crack propagation rate was affected by the applied electric field amplitudes, with evidence of a saturation threshold for crack propagation in relaxor ferroelectrics.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Heng Xiao, Joseph A. Arsecularatne, Jing Zheng, Mark J. Hoffman, Zhongrong Zhou
Summary: This study investigates the influence of enamel microstructure on corrosion and tribocorrosion behavior of bovine and human molars using various microscopy techniques and mechanical testing methods. The research suggests that regions with transversal HAP nanocrystallites exhibit better corrosion resistance compared to those with longitudinal crystallites.
Article
Materials Science, Multidisciplinary
Nitish Kumar, Scarlet Kong, Pankaj Sharma, Xi Shi, Gaurav Vats, Stefano Checchia, Jan Seidel, Mark Hoffman, John Daniels
JOURNAL OF MATERIALS CHEMISTRY C
(2020)
Article
Materials Science, Multidisciplinary
Xi Shi, Nitish Kumar, Mark Hoffman
JOURNAL OF MATERIALS CHEMISTRY C
(2020)
Article
Materials Science, Multidisciplinary
M. Hinterstein, K-Y Lee, S. Esslinger, J. Glaum, A. J. Studer, M. Hoffman, M. J. Hoffmann
Article
Engineering, Mechanical
Yankui Song, Ke Xiao, Guo Xiang
Summary: The novelty of this study lies in constructing an Entropy-based wear and fluid-solid-thermal (FST) coupled model for journal bearings, and revealing the transient interaction behavior between wear evolution and FST evolution during repeated starting and stopping. The wear rate is measured experimentally, and the contact temperature, friction coefficient and normal contact force are obtained from the validated FST model. Wear tests and numerical calculations are conducted to validate the predicted wear rate and investigate the time-varying wear and FST evolution of journal bearings.
Article
Engineering, Mechanical
Xin-long Liu, Xin Guan, Yuan Zhong, Qian Xiao, Yong Cao, Wu-lue Zhang, Song Zhang, Yi-ting Zheng, Ming-sheng Gao, Dao-yun Chen, Wen-bin Yang
Summary: Gaps in the conductor rail joints of intercity trains have an impact on current transmission and the wear of carbon skateboards. These gaps decrease the coefficient of friction, increase electrical contact resistance, and affect the wear rate of carbon skateboards.
Article
Engineering, Mechanical
Yuhang Wu, Conglin Dong, Xiuqin Bai, Chengqing Yuan
Summary: The study developed a new composite material by incorporating hexagonal boron nitride (h-BN) particles into a thermoplastic polyurethane (TPU) matrix, which exhibited excellent self-lubricating properties and reduced frictional excitation forces. The addition of h-BN particles effectively reduced the coefficient of friction, decreased fluctuation amplitude, enhanced wear resistance, and attenuated vibration behaviors.
Article
Engineering, Mechanical
Tiancheng Ouyang, Xiuyang Sun, Wentao Tang, Yinxuan Li, Zhi Qun Tian, Yanzhou Li
Summary: By adding nitrogen-doped graphene and C60 nanoparticles to the lubricant, a highly efficient nano-lubricant with vibration and noise reduction properties is synthesized.
Article
Engineering, Mechanical
Xin Zhuo, Jun Cao, Haibo Huang, Li Liu, Xinkun Suo, Peiqing Ye, Zeshan Abbas
Summary: A polymer coating prepared by liquid spraying technology on the surface of 20CrMo steel demonstrates good tribological and anti-cavitation erosive properties. It can effectively replace CuPb24Sn copper alloy in valve plates for pumps under different lubrication conditions. The coating exhibits adhesive wear and reduces frictional loss, and mainly shows abrasive wear under complex working conditions. Its lipophilicity, high hardness to elastic modulus ratio, and corrosion resistance are the main influencing factors for its performance.
Article
Engineering, Mechanical
Md. Aminul Islam, Jiaren (Jimmy) Jiang, Yongsong Xie
Summary: Erosion-corrosion is a major factor in material loss and reduced useful life of hydro-transport equipment. This study evaluates the erosion-corrosion characteristics of different materials and finds that matrix wear affects the degradation of carbides. Sufficient wear and corrosion resistance in the surrounding matrix are important for good erosion-corrosion resistance.
Article
Engineering, Mechanical
Andre Dubois, Oussama Filali, Laurent Dubar
Summary: This study investigates the effect of surface roughness, contact pressure, and lubrication on the onset of galling in aluminum 6082-T6 using a pin-on-plate tribometer. The experimental results show that the roughness and lubricants play a significant role in preventing galling.
Article
Engineering, Mechanical
Jizhan Wu, Peitang Wei, Guoqiang Liu, Difa Chen, Xiuhua Zhang, Taimin Chen, Huaiju Liu
Summary: This study conducted a comprehensive evaluation of the DLC coating treatment on the loading capacity of gears and characterized the surface features and fatigue performance. The results demonstrate that DLC coating significantly improves the hardness and surface residual compressive stress of the gears, as well as enhances their contact fatigue performance.
Article
Engineering, Mechanical
Yangping Liu, Hwaran Lee, Annsley Mace, Jeremy L. Gilbert
Summary: An AFM-based single asperity tribology method was used to investigate the wear performance of carbides and base metal matrix in high carbon CoCrMo alloy. The wear behavior of the two types of carbides was stress-dependent and influenced by chemical composition. Cr-rich carbides exhibited higher wear resistance compared to Mo-rich carbides.
Article
Engineering, Mechanical
Zdenek Riha, Michal Zelenak, Akash Nag, Jakub Poloprudsky, Tomas Kruml, Sergej Hloch
Summary: This study investigates the erosion performances of a high-speed modulated jet (MWJ) and continuous water jet (CWJ). By comparing different nozzles and water jet powers, the effects of modulated and continuous jets on aluminum alloy were studied. The results show that under certain conditions, modulated jet can create deeper and sharper grooves while reducing the impact of lateral flow.
Article
Engineering, Mechanical
Chunyu Yu, Weipu Li, Yang Guo, Xianbin Sun, Fanli Hong, Ning Sun, Qinghai Zhang
Summary: This study explores the relationship between the wear rate of train brake pads and its features, and proposes a method for predicting the wear rate suitable for small sample data. Grey relational analysis and Pearson correlation analysis are used to determine the preferred features that affect the wear rate, and a BOA-BP model is established for prediction. The results show that BOA-BP exhibits better advantages in prediction with small samples.
Article
Engineering, Mechanical
Shan Yin, Xin Zhao, Shuangchao Huang, Zefeng Wen, Xuesong Jin
Summary: This study simulated the rolling contact of a driving wheelset over tangent and curved tracks at a speed up to 500 km/h using an explicit finite element approach to derive creep curves. The comparison between quasi-steady curves and transient curves in the presence of rail corrugation helped to identify cases where traditional theories are inapplicable and where transient effects must be considered. Additionally, the study further analyzed the influence of middle/high-frequency vibrations in the presence of rail corrugation.
Article
Engineering, Mechanical
Jiyao Zhang, Yuanlie Yu, Junlei Tang, Yingying Wang, Honggang Sun, Kaikai Song, Jianhong Gong, Pingping Liu, Xiaoming Liu, Lina Hu, Parthiban Ramasamy, Juergen Eckert
Summary: The influence of high-carbon addition on the microstructure, hardness, and wear behavior of CoCrNi alloy was investigated. It was found that the addition of carbon resulted in the formation of carbide particles, enhancing the hardness and improving the wear resistance. Fracture and detachment of hard carbides during friction introduced additional abrasive particles, transitioning the wear mechanism from adhesive-dominated to abrasive-dominated.
Article
Engineering, Mechanical
Yanfei Liu, Shengtao Yu, Ruize Zhang, Xiangyu Ge, Wenzhong Wang
Summary: This study reports the tribological behavior of nanodiamond plate (NDPL) as a nanoadditive for the first time and compares it with nanodiamond particles (NDPA). The results show that NDPL provides better lubrication performance at higher concentrations, and the sliding between NDPLs and the structural transformation from sp3 to sp2 carbon play a crucial role in lubrication and wear resistance.
