Article
Metallurgy & Metallurgical Engineering
Ai-hua Yu, Wei Xu, Xin Lu, Maryam Tamaddon, Bo-wen Liu, Shi-wei Tian, Ce Zhang, Muhammad Arif Mughal, Jia-zhen Zhang, Chao-zong Liu
Summary: To improve the treatment effect of bone defect repair, researchers designed and fabricated titanium scaffolds with graded structures. Among them, scaffold P4 exhibited lower maximum von Mises stress, higher strength, a more matched elastic modulus to cortical bone, and permeability within the range of human bone. Therefore, scaffold P4 is a promising candidate for bone defect reconstructions.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Chemistry, Multidisciplinary
Hassan Mehboob, Abdelhak Ouldyerou, Muhammad Farzik Ijaz
Summary: The study examines the influence of porous implants on full and partial osseointegration in different bone qualities. Finite element models of porous implants were created and combined with normal and weak bones to simulate full and partial osseointegration. The results indicate that decreasing implant stiffness leads to increased stress in surrounding bones during full osseointegration, but decreased stress during partial osseointegration. Moreover, using porous implants in normal bone can enhance bone density, while porous implants may reduce susceptibility to bone damage in weak bones.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
Wei Xu, Aihua Yu, Yu Jiang, Yageng Li, Ce Zhang, Harsh-preet Singh, Bowen Liu, Chenjin Hou, Yun Zhang, Shiwei Tian, Jiazhen Zhang, Xin Lu
Summary: Functionally graded porous titanium scaffolds were designed and fabricated, showing high biocompatibility and mechanical properties, making them suitable for dental implants.
MATERIALS & DESIGN
(2022)
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
Biotechnology & Applied Microbiology
Klaudia Kulcsar, Matej Buzgo, Pedro Ferreira Costa, Ibolya Zsoldos
Summary: Three-dimensional printing technology enables the production of open cell porous structures, which have advantages in weight reduction and improvement of osseointegration and mechanical properties in implant structures. This study investigates porous titanium structures created by cutting spheres, using different strategies to achieve porosity. By conducting mechanical simulations and experimental validation, we identify the structure with the least loss of load-bearing capacity under the same porosity levels and mechanical stresses.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
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
Materials Science, Multidisciplinary
Shubo Xu, Hailong Ma, Xiujuan Song, Sen Zhang, Xinzhi Hu, Zixiang Meng
Summary: In recent years, bone defect and bone tissue damage have become common clinical diseases. The development of bionic bone has had an important impact on the repair and reconstruction of bone tissue. Porous scaffolds with adjustable pore size and controllable shape have solved the problem of mismatch in bone repair. In this study, 316L porous stainless steel scaffolds with different pore sizes were prepared using selective laser melting method, and their mechanical properties and microstructures were studied and analyzed.
Article
Chemistry, Physical
Artak Heboyan, Roberto Lo Giudice, Les Kalman, Muhammad Sohail Zafar, Joao Paulo Mendes Tribst
Summary: The aim of this study was to assess and compare the stress-strain pattern of zygomatic dental implants supporting different superstructures using 3D finite element analysis (FEA). Stiffer materials such as Zirconia, CoCr and Titanium seemed to be a preferable option to reduce stress in zygomatic implants and prosthetic screws.
Article
Chemistry, Physical
Jinyang Zhang, Xiao Zhang, Yang Chen, Wei Feng, Xianshuai Chen
Summary: This study designed two types of porous implants, Type I and Type II, and evaluated their biomechanical behavior using finite element analysis. The results showed that Type I implants exhibited better stress distribution and significantly reduced stiffness, optimizing stress distribution at the implant-bone interface.
Article
Computer Science, Interdisciplinary Applications
Jianguo Zhang, Peng Chen, Fengling Hu, Chen Chen, Liang Song
Summary: Currently, selective laser melting (SLM) 3D printing technology can accurately control the internal pore structure and complex cell shape. Three types of reticulated meshes with cubic, G7 and composite structure cell shapes were fabricated by the SLM 3D printing technology using Ti-6Al-4V alloy powders. The effect of porous dental implants with different spatial porosity characteristics on osseointegration was comprehensively evaluated using ANSYS finite element software by analyzing the bone stresses around the implant and the stresses in the implant. The results show that porous dental implants with composite structure of pore characteristics have improved mechanical and biological properties and can better promote the growth and integration of bone tissue.
COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING
(2023)
Article
Automation & Control Systems
Kalayu Mekonen Abate, Aamer Nazir, Jeng-Ywan Jeng
Summary: This study successfully designed and optimized hip implants with cellular structures, reducing the stiffness and weight of the implants, promoting bone tissue ingrowth. The cellular implants with 56% and 58% porosity have demonstrated potential for orthopedic and prosthetic applications.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Thermodynamics
Z. Kazemi, M. Soleimani, H. Rokhgireh, A. Nayebi
Summary: In this study, the selective laser melting method (SLM) was simulated by finite element method (FEM) to manufacture a sample of 316 stainless steel. The temperature variation as a function of time and coordinates was obtained, along with the determination of the melting pool and the creation of keyholes at the end of each track. The obtained temperature distribution will be used to characterize the mechanical properties of the manufactured sample.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Chemistry, Physical
Guilherme da Rocha Scalzer Lopes, Jefferson David Melo de Matos, Daher Antonio Queiroz, Joao Paulo Mendes Tribst, Nathalia de Carvalho Ramos, Mateus Garcia Rocha, Adriano Baldotto Barbosa, Marco Antonio Bottino, Alexandre Luiz Souto Borges, Renato Sussumu Nishioka
Summary: This study evaluated the biomechanical behavior of Morse taper implants using different abutments for supporting a screw-retained 3-unit fixed partial denture. The results showed that under favorable conditions, the use of CMN or MP abutments to support a fixed partial denture is feasible.
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
Engineering, Manufacturing
Ming Liu, Louis N. S. Chiu, Chaitanya Vundru, Yang Liu, Aijun Huang, Chris Davies, Xinhua Wu, Wenyi Yan
Summary: A characteristic time-based heat input (CTI) model has been developed and implemented in a finite-element thermal-mechanical model to significantly reduce the process simulation time while satisfactorily predicting the temperature and residual stress state of SLMed parts. The CTI model speeds up computation by applying the integrated energy along the scan path over a characteristic heating time, ensuring accurate capture of peak temperature and heat transfer with lower computational cost compared to the traditional Goldak model.
ADDITIVE MANUFACTURING
(2021)