Article
Dentistry, Oral Surgery & Medicine
Cristina Falcinelli, Francesco Valente, Marcello Vasta, Tonino Traini
Summary: This study reviews the state of the art of Finite Element (FE) modeling in implant dentistry, highlighting the main features and current limitations, and providing suggestions for future research. The results show that there is no standardized approach for FE modeling in the dentistry field, and there are simplifications in the assumptions about bone tissue, muscle forces, and bone remodeling. Therefore, future research should focus on investigating the microscale loading influence on the bone-implant complex and using multiscale models for more comprehensive information.
Article
Biology
Andreza Costa Dayrell, Cintia Tereza Pimenta de Araujo, Ricardo Lopes Rocha, Cristina Pereira Isolan, Pedro Yoshito Noritomi, Marcelo Ferraz Mesquita
Summary: This study evaluated the stress distribution in mandibular implant-supported prosthesis with an internal connection morse taper interface. The results showed that stress values were evenly distributed to the pen-implant bone and implants in all tested conditions. The increase in applied load did not result in a proportional increase in stress values. Four and five implants had similar mechanical demands and five implants did not provide additional benefits. The stress values of the commercial pure titanium frameworks approached the yield strength of the metal.
COMPUTERS IN BIOLOGY AND MEDICINE
(2022)
Article
Biophysics
Basil Mathai, Santanu Dhara, Sanjay Gupta
Summary: This study aimed to develop an orthotropic bone remodelling algorithm for evaluation of peri-prosthetic bone adaptation in the uncemented implanted femur. The algorithm was tested on intact femur models to verify predicted results, and compared with an isotropic formulation. Results showed differences in bone directionality and density predictions between the two models, highlighting the influences of bone orthotropy and mechanical stimulus in the adaptation process.
BIOMECHANICS AND MODELING IN MECHANOBIOLOGY
(2021)
Article
Biophysics
Basil Mathai, Santanu Dhara, Sanjay Gupta
Summary: This study aimed to develop an orthotropic bone remodelling algorithm for evaluating peri-prosthetic bone adaptation in uncemented implanted femur. The orthotropic directionality, based on principal stress directions, was found to be consistent with trabecular orientation. Despite reasonable agreement in peri-prosthetic bone density distributions, there were quantitative differences between the isotropic and orthotropic models.
BIOMECHANICS AND MODELING IN MECHANOBIOLOGY
(2021)
Article
Engineering, Biomedical
Kangning Su, Yuxiao Zhou, Mehran Hossaini-Zadeh, Jing Du
Summary: In this study, finite element models based on micro-CT images were used to investigate bone-implant mechanics, showing higher strain concentration in the thinner buccal bone plates and the impact of implant distance from the buccal plate on mechanical stimuli in bone, which may affect bone remodeling and resorption processes.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Chemistry, Physical
Takashi Matsuoka, Tamaki Nakano, Satoshi Yamaguchi, Shinji Ono, Shota Watanabe, Takumi Sato, Hirofumi Yatani
Summary: This study investigated the mechanical influences of the implant-abutment connection type and inter-implant distance on the inter-implant bone using three-dimensional finite element analysis. The results showed that a CC implant is advantageous for maintenance of the inter-implant bone, and regardless of the connection type, the stress of the inter-implant bone increases as the inter-implant distance decreases.
Article
Computer Science, Interdisciplinary Applications
Pinar Ercal, Aysegul Erten Taysi, Demet Cagil Ayvalioglu, Meltem Mert Eren, Soner Sismanoglu
Summary: The study found that the C/I ratio and peri-implant bone resorption in short implants have a significant impact on the generated stress, with resorption leading to a significant increase in stress values. The preference of crown materials does not affect stress distribution in the bone and implant structure under static loading.
MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING
(2021)
Article
Chemistry, Physical
Pawhat Nimmawitt, Abdul Azeez Abdu Aliyu, Boonrat Lohwongwatana, Sirida Arunjaroensuk, Chedtha Puncreobutr, Nikos Mattheos, Atiphan Pimkhaokham
Summary: This study assessed the stress distribution on bone tissue and bone-implant interface of a customized anatomic root-analog dental implant (RAI) for different bone density types. The results showed that RAIs have a more favorable stress distribution pattern compared to conventional implants, and the presence of a porous structure reduces stress in cancellous bone.
Article
Biology
Emika Sato, Ryuji Shigemitsu, Takehiko Mito, Nobuhiro Yoda, John Rasmussen, Keiichi Sasaki
Summary: This study utilized finite element analysis based on CT data to investigate the effects of bone remodeling on biomechanical behavior in a patient with a mandibular implant-supported overdenture. The results showed significant changes in bone mass and quality over 12 years, with evidence of area-specific bone resorption around each implant, indicating adaptation to mechanical loads by peri-implant bone remodeling.
COMPUTERS IN BIOLOGY AND MEDICINE
(2021)
Article
Biology
Onur Gonul, Ahmet Cicek, Ibrahim Murat Afat, Emine Tuna Akdogan, Onur Atali
Summary: The aim of this study is to examine the effect of unilaterally more posterior placement of implants according to the all-on-four concept on stress distribution on bone, implants, and other prosthetic components using finite element analysis. The findings suggest that posteriorly placed implants can prevent bone resorption caused by high stress around the crestal bone, but may increase stress on the implants and prosthetic parts.
Article
Dentistry, Oral Surgery & Medicine
Wenqian Yu, Xiaoqian Li, Xiaoni Ma, Xin Xu
Summary: This study used finite element analysis to evaluate the biomechanical properties of inclined and straight implants for implant-supported complete-arch fixed mandibular prostheses. The results showed that the inclined design had a more favorable stress distribution, and zirconia and metal frameworks distributed stresses more effectively to the implants and supporting bone.
JOURNAL OF PROSTHETIC DENTISTRY
(2022)
Article
Biochemistry & Molecular Biology
Luca Comuzzi, Mario Ceddia, Natalia Di Pietro, Francesco Inchingolo, Angelo Michele Inchingolo, Tea Romasco, Margherita Tumedei, Alessandro Specchiulli, Adriano Piattelli, Bartolomeo Trentadue
Summary: This study used three-dimensional finite element analysis to investigate the biomechanical effects of different positions of dental implants relative to the alveolar crest. The findings suggest that placing the implant subcrestally (-1 to -2 mm) can help reduce peri-implant bone resorption and improve long-term implant success.
Article
Orthopedics
Sanne W. G. van Hoogstraten, Joris Hermus, Arjan C. Y. Loenen, Jacobus J. Arts, Bert van Rietbergen
Summary: This study investigates the effect of malalignment in Total Ankle Replacement (TAR) on contact stresses at the bone-implant interface. The results show that TAR malalignment increases peak contact pressure and shear stress at the bone-implant interface, which could contribute to bone damage and implant loosening.
BMC MUSCULOSKELETAL DISORDERS
(2022)
Article
Computer Science, Interdisciplinary Applications
Hyeonjong Lee, Minhye Jo, Gunwoo Noh
Summary: This study evaluated fatigue failure and microgap formation in dental implants under various clinical circumstances. The results showed that tissue-level implants have biomechanical advantages over bone-level implants, and microgap formation varies with implant diameter and loading direction.
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
(2021)
Article
Dentistry, Oral Surgery & Medicine
Pietro Ausiello, Alessandro Espedito Di Lauro, Joao Paulo Mendes Tribst, David C. Watts
Summary: This study aimed to evaluate the influence of new resin-based CAD-CAM implant-supported materials on posterior crown restoration stress and strain concentrations. The finite element analysis revealed differences in stress distribution among different resin materials. The Estelite P Block material showed lower tensile and shear stresses compared to other resin-based materials.
Article
Construction & Building Technology
Xuekang Guo, Zhi Yang, Yi Li, Hong Guan, Xinzheng Lu, Mengzhu Diao
Summary: This paper investigates the mechanical behavior of upward and downward punching shear failures in slab-column joints of flat plate structures, revealing that the punching shear strength is higher in upward shear than in downward shear, and the residual deformation from upward shear significantly influences the collapse behavior.
JOURNAL OF STRUCTURAL ENGINEERING
(2022)
Article
Meteorology & Atmospheric Sciences
Thomas M. Hamill, Jeffrey S. Whitaker, Anna Shlyaeva, Gary Bates, Sherrie Fredrick, Philip Pegion, Eric Sinsky, Yuejian Zhu, Vijay Tallapragada, Hong Guan, Xiaqiong Zhou, Jack Woollen
Summary: NOAA has developed a global reanalysis dataset for initializing ensemble forecasts, with higher quality than previous reanalysis systems but slightly lower than the preoperational version of the real-time data assimilation system.
MONTHLY WEATHER REVIEW
(2022)
Article
Engineering, Civil
Anh-Vy Nguyen, Shanmuganathan Gunalan, Poologanathan Keerthan, Hong Guan, Sanam Aghdamy
Summary: Aluminium lipped channel (ALC) beams are becoming popular in construction due to their durability and high strength-to-weight ratio. However, their lower elastic modulus compared to steel makes them susceptible to buckling under shear, web crippling, and bending actions. Previous research focused on the isolated structural behavior of ALC beams under individual actions, but practical applications require investigation of their behavior under combined actions to develop rational design rules. A recent study at Griffith University examined the behavior and design of ALC beams subjected to combined bending and shear actions, with a specific focus on web crippling. Experimental tests were conducted to determine the interaction levels between bending moment and web crippling strengths, comparing the results with current design rules to verify their accuracy.
THIN-WALLED STRUCTURES
(2022)
Article
Dentistry, Oral Surgery & Medicine
Ka Ming Fan, Samuel Sprague, Ping Zhang, Anura Ariyawardana, Newell W. Johnson
Summary: This study analyzed the trends in the incidence of oropharyngeal cancers (OPC) in Australia from 1982 to 2017. The results showed a significant increase in the age-standardized incidence rate of OPC, particularly in men. The rise in incidence was attributed to increased oral sex practices and continued alcohol and tobacco exposure. The most common subsites affected were the base of the tongue and oropharynx.
Article
Meteorology & Atmospheric Sciences
Yuejian Zhu, Bing Fu, Bo Yang, Hong Guan, Eric Sinsky, Wei Li, Jiayi Peng, Xianwu Xue, Dingchen Hou, Xin-Zhong Liang, Sanghoon Shin
Summary: The Global Ensemble Forecast System version 12 (GEFSv12) has been implemented into National Centers For Environmental Prediction operations since September 2020, which improved forecast skills in many categories by increasing horizontal resolution, ensemble members, and extended forecasts. The improvements were achieved through upgrades in model resolution, data assimilation, and stochastic schemes. Coupled GEFS experiments further improved sub-seasonal forecast skill by coupling atmospheric, land surface, ocean, ice, and wave models, reducing forecast uncertainties and improving correlation.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Engineering, Civil
Junkun Wang, Yi Li, Hong Guan, Youzhe Yang, Mengzhu Diao, Weibing Xu, Yanjiang Chen
Summary: The punching shear capacity and failure behavior of concrete flat plate slab-column joints with drop panels were studied. It was found that for a thick drop panel, punching failure occurred first at the slab-drop panel interface, followed by a second punching shear failure along the column perimeter; while for a thin drop panel, punching shear failure only occurred at the column perimeter. Numerical simulation revealed that larger eccentricities resulted in higher shear stresses and earlier damage. A post-punching strength prediction method was proposed, with predicted strengths deviating from experimental results by -16% and 23% for thick and thin drop panels, respectively.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Mahyar Masaeli, Hassan Karampour, Benoit P. P. Gilbert, Hong Guan, Arash Behnia, Nima Talebian
Summary: With the trend towards zero carbon construction, mass timber structures in the industry are gaining global acceptance. However, beam-to-column connections in these structures designed for shear actions may need to withstand moment actions and large deformations to meet building standards. This study uses finite element analysis to investigate the failure of a typical bolted connection due to large deformations and rotations, and proposes an economic retrofitting design solution using self-tapping screws. The analysis validates the proposed solution and demonstrates that proper arrangement of screws can enhance the moment-resisting capacity and ductility of the connection.
KSCE JOURNAL OF CIVIL ENGINEERING
(2023)
Article
Dentistry, Oral Surgery & Medicine
Irosha Perera, Hemantha Amarasinghe, Ruwan D. Jayasinghe, Iresha Udayamalee, Nadeena Jayasuriya, Saman Warnakulasuriya, Newell W. Johnson
Summary: Oral cancer is the most common malignancy among Sri Lankan males and a top 10 cancer among females. Despite being preventable and controllable, contextual factors and social determinants consistently hinder progress in addressing oral cancer inequalities. This review aims to critically analyze oral cancer epidemiology and inequalities in Sri Lanka, using multiple data sources.
COMMUNITY DENTISTRY AND ORAL EPIDEMIOLOGY
(2023)
Article
Computer Science, Interdisciplinary Applications
Yifan Fei, Wenjie Liao, Xinzheng Lu, Hong Guan
Summary: In this study, a novel graph neural network (GNN) is proposed for the estimation of construction material quantity (CMQ) in structural design. The GNN is capable of automatically extracting features from all CMQ-related information, unlike existing data-driven methods. By incorporating a prior knowledge inclusion strategy, the GNN avoids fundamental errors encountered by purely data-driven methods. Numerical experiments show that the proposed CMQ estimation method outperforms existing data-driven methods in terms of accuracy and is significantly faster. This study is expected to have a positive impact on the objective evaluation of computer-aided design, promoting the adoption of low-cost and low-carbon-emission building designs.
COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING
(2023)
Article
Engineering, Civil
Zidong Zhao, Xiaowei Cheng, Yi Li, Mengzhu Diao, Hong Guan, Yi An
Summary: This study investigates the collapse resistance behavior of beam-column joints using dry connections. Results show that the strengthened top-seat angle connection improves resistance to beam flexural and compressive arch action (B-CAA), but reduces ductility. The presence of unbonded post-tensioning tendons significantly enhances the collapse resistance of the joints.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Yudi Zhang, Xiaowei Cheng, Mengzhu Diao, Yi Li, Hong Guan, Hailin Sun
Summary: Fibre-reinforced polymer (FRP) strips are widely used for retrofitting reinforced concrete (RC) frame structures to improve their resistance against progressive collapse. However, existing FRP retrofitting schemes may lead to an undesirable strong-beam weak-column mechanism in seismic scenarios. This study optimized existing FRP retrofitting schemes using numerical investigation and identified effective schemes that improve the structural performance against progressive collapse at large deformations while maintaining the strong-column weak-beam mechanism during seismic events. Based on parametric analyses, analytical methods were proposed to calculate the strength of FRP retrofitted RC frames under a catenary mechanism, allowing for the design of such structures.
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
Xinyi Cheng, Benoit P. P. Gilbert, Chunhao Lyu, Hong Guan
Summary: This paper experimentally investigated the influence of strain rate on mechanical properties affecting the design of timber connections. Results showed that embedment stiffness and strength increased under dynamic strain rates, while embedment ductility decreased. Fracture energies and tension strength perpendicular to grain were mostly unaffected. The influence of strain rate on timber connections was further analyzed using experimental data and showed that dynamic strength can be higher, but dynamic ductility can be reduced.
JOURNAL OF STRUCTURAL ENGINEERING
(2023)
Article
Engineering, Mechanical
Qian Xiong, Hong Guan, Hui Ma, Zhiyuan Wu, Xumin Guo, Weiwei Wang
Summary: This study proposes a nonlinear dynamic model for a rotating cracked blade considering the breathing effect, and a new crack fault diagnosis indicator is also proposed. Verification and analysis show that the severity of the crack affects the energy response, and vibration characteristic parameters can be effectively used for crack fault diagnosis.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Construction & Building Technology
Yifan Fei, Wenjie Liao, Xinzheng Lu, Ertugrul Taciroglu, Hong Guan
Summary: Intelligent structural design based on machine learning is a novel design paradigm, but its performance is limited by the quality and quantity of training data. This study proposes a semi-supervised learning method to address data insufficiencies and long-tailed data distributions for shear-wall layout optimization, achieving improved design performance.
JOURNAL OF BUILDING ENGINEERING
(2023)
Proceedings Paper
Construction & Building Technology
Mengzhu Diao, Hong Guan, Huizhong Xue, Yi Li, Xinzheng Lu
Summary: This study investigates the load-resisting and deformation capacities of reinforced concrete flat plate structures under punching shear and post-punching failure conditions. The results show that the punching shear capacity is determined by the geometric dimensions of the slab, while the post-punching strength is primarily regulated by the integrity rebars going through the column.
PROCEEDINGS OF THE 17TH EAST ASIAN-PACIFIC CONFERENCE ON STRUCTURAL ENGINEERING AND CONSTRUCTION, EASEC-17 2022
(2023)
