scholarly journals 3-D digital modeling and bio-mechanics research of the anterior disk displacement without reduction temporomandibular joint system

2019 ◽  
Author(s):  
Linfeng Lai ◽  
Guofeng Xiong ◽  
Chenyao Huang ◽  
Fan Zhou ◽  
Fujian Xia
Keyword(s):  
Maximum Stress ◽  
Lateral Part ◽  
Articular Disc ◽  
Finite Elements Analysis ◽  
Joint System ◽  
Data Registration ◽  
Fea Model ◽  
3D Data ◽  
Digital Modeling ◽  
3D Fea

Abstract Background： Anterior and/or medial displacement of the articular disc or intra-articular disorders( ID) is the most common form of TMJ dysfunction.In the present study,3D finite elements analysis (FEA) models including the maxilla, disc and mandible were established using 3D data registration technology. Materials and Methods： Six healthy volunteers and 20 TMD patients were selected.CT and MRI data were collected to build 3D FEA model of mandibular and TMJ disc. Result: Results showed that maximum stress of the normal lateral articular disc in the normal and pathological models appeared in the lateral part of the middle band. In the normal model, stress distribution was more uniform and the joint disc and the condyle were also subjected to higher load at the junction of the articular disc and the condyle. Conclusion: When the friction coefficient of the side with anterior displacement increased, stress on the disc, condyle and mandible of the opposite side increased. Simultaneously, stress values of the disc, condyle and mandible were cd32fvhigher than those of the normal lateral joint.

Finite Elements Analysis of the Temporomandibular Joint Disc in Patient with Intra-articular Disorders

2019 ◽  
Author(s):  
Linfeng Lai ◽  
Guofeng Xiong ◽  
Chenyao Huang ◽  
Fan Zhou ◽  
Fujian Xia
Keyword(s):  
Friction Coefficient ◽  
Finite Elements ◽  
Stress Distribution ◽  
Articular Disc ◽  
Finite Elements Analysis ◽  
Temporomandibular Joint Disc ◽  
Data Registration ◽  
Fea Model ◽  
3D Data ◽  
3D Fea

Abstract Abstract Background：Anterior and/or medial displacement of the articular disc or intra-articular disorders( ID) is the most common form of TMJ dysfunction.In the present study,3D finite elements analysis (FEA) models including the maxilla, disc and mandible were established using 3D data registration technology.Methods：Six healthy volunteers and 20 TMD patients were selected.CT and MRI data were collected to build 3D FEA model of mandibular and TMJ disc.Stress distribution with different friction coefficient was measured.Result:Results showed that maximum stress of the lateral articular disc in the normal and pathological models. In the normal model, stress distribution was 2.21,1.56,1.49 MPa with 0.001 0.3 and 0.4 friction coefficient.In ID model,stress distribution is 3.87,7.23,7.77MPa respectively. Conclusion:When the friction coefficient of the side with anterior displacement increased, stress on the disc, condyle and mandible of the opposite side increased. Simultaneously, stress values of the disc, condyle and mandible were higher than those of the normal lateral joint.

scholarly journals Finite Elements Analysis of the Temporomandibular Joint Disc in Patients with Intra-articular Disorders

2020 ◽  
Author(s):  
Linfeng Lai ◽  
Guofeng Xiong ◽  
Chenyao Huang ◽  
Fan Zhou ◽  
Fujian Xia
Keyword(s):  
Friction Coefficient ◽  
Finite Elements ◽  
Stress Distribution ◽  
Temporomandibular Joint ◽  
Finite Elements Analysis ◽  
Temporomandibular Joint Disc ◽  
Fea Model ◽  
Tmj Disc ◽  
Joint Disorder ◽  
3D Fea

Abstract Background： Anterior and/or medial displacement of the temporomandibular joint disorder(TMJ) disc or intra-articular disorders( ID) is the most common form of TMJ dysfunction(TMD).TMD cause change of friction coefficient during TMJ movement. In the present study, We provided a 3D finite elements models(FEM) including the maxilla, disc and mandible and evaluated the stress distribution with different friction coefficient. Methods: 14 volunteers without TMD and 20 TMD patients,who were diagnosed by MRI, were selected.CT and MRI data were collected to build 3D FEA model of mandibular and TMJ disc.Stress distribution with different friction coefficient was measured. Result: In the normal model, stress distribution on TMJ disc was 2.07±0.17,1.49±0.14,1.41±0.14MPa with 0.001 0.3 and 0.4 friction coefficient.In TMD model,stress distribution is 3.87±0.15,7.23±0.22,7.77±0.19MPa respectively. Conclusion: When the friction coefficient of the side with anterior displacement increased, stress on the disc, condyle and mandible of the opposite side increased. Simultaneously, stress values of the disc, condyle and mandible were higher than those of the normal lateral joint.

scholarly journals Finite Elements Analysis of the Temporomandibular Joint Disc in Patients with Intra-articular Disorders

2020 ◽  
Author(s):  
Linfeng Lai ◽  
Guofeng Xiong ◽  
Chenyao Huang ◽  
Fan Zhou ◽  
Fujian Xia
Keyword(s):  
Friction Coefficient ◽  
Finite Elements ◽  
Stress Distribution ◽  
Temporomandibular Joint ◽  
Finite Elements Analysis ◽  
Temporomandibular Joint Disc ◽  
Fea Model ◽  
Tmj Disc ◽  
Joint Disorder ◽  
3D Fea

Abstract Background：Anterior and/or medial displacement of the temporomandibular joint disorder(TMJ) disc or intra-articular disorders( ID) is the most common form of TMJ dysfunction(TMD).TMD cause change of friction coefficient during TMJ movement. In the present study, We provided a 3D finite elements models(FEM) including the maxilla, disc and mandible and evaluated the stress distribution with different friction coefficient.Methods: 14 volunteers without TMD and 20 TMD patients,who were diagnosed by MRI, were selected.CT and MRI data were collected to build 3D FEA model of mandibular and TMJ disc.Stress distribution with different friction coefficient was measured.Result: In the normal model, stress distribution on TMJ disc was 2.07±0.17,1.49±0.14,1.41±0.14MPa with 0.001 0.3 and 0.4 friction coefficient.In TMD model,stress distribution is 3.87±0.15,7.23±0.22,7.77±0.19MPa respectively. Conclusion:When the friction coefficient of the side with anterior displacement increased, stress on the disc, condyle and mandible of the opposite side increased. Simultaneously, stress values of the disc, condyle and mandible were higher than those of the normal lateral joint.

A Scale Stretch Method Based on ICP for 3D Data Registration

2009 ◽  
Vol 6 (3) ◽  
pp. 559-565 ◽  
Author(s):  
Shihui Ying ◽  
Jigen Peng ◽  
Shaoyi Du ◽  
Hong Qiao
Keyword(s):  
Data Registration ◽  
3D Data

Analysis of the Crack of Heavy Dump Truck Cargo Body Floor

2015 ◽  
Vol 723 ◽  
pp. 3-6 ◽  
Author(s):  
Xiang Yin Liu ◽  
Da Wei Liu ◽  
Xiao Dong Cheng ◽  
Min Jie Si
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Maximum Stress ◽  
Basic Element ◽  
Dump Truck ◽  
Original Structure ◽  
Element Analysis ◽  
Shell Elements ◽  
Backing Plate ◽  
Fea Model

In view of the heavy dump truck occurred cargo body floor cracking problems in the process of using, this paper established cargo body finite element analysis (FEA) model with the shell elements as basic element, and calculated the strength of the cargo body floor by using the Hyperworks (a FEA software). The results of finite element analysis indicate that the crack took place because the stress of the connection of floor and support beam of front plate and the connection of floor and backing plate of turnover bearing was close to or exceed the material yield strength. On the basis of the calculation, we worked out the causes of the abnormal floor crack, which accord with the actual crack case. According to the requirement of practical process, the structure of floor was improved, thus the maximum stress value decreased 30% and 80.9% at two positions respectively, compared with the original structure, this shows that the improved method is effective.

Utilizing Design for Metal Additive Manufacturing and Topology Optimization to Improve Product Designs

2019 ◽  
Author(s):  
Martin L. Tanaka ◽  
Jeremy J. Smith
Keyword(s):  
Topology Optimization ◽  
Additive Manufacturing ◽  
Yield Strength ◽  
Maximum Stress ◽  
Optimized Design ◽  
Original Design ◽  
Optimization Software ◽  
Metal Additive Manufacturing ◽  
Fea Model ◽  
Metal Additive

Abstract Metal additive manufacturing has transformed the product design process by enabling the fabrication of components with complex geometries that cannot be manufactured using conventional methods. Initial designs can be further enhanced by employing topology optimization software and Design for Metal Additive Manufacturing (DFMAM) guidelines. In this study, a commercially available bicycle spider-crank was optimized for three-dimensional (3D) metal manufacturing. The 3D surface geometry of the original spider-crank was acquired using a white light scanner and used to generate a 3D solid model of the part. Boundary conditions were obtained from cycling loads found in published literature and applied to an ANSYS Finite Element Analysis (FEA) model. The FEA model was analyzed to determine the von Mises stress throughout the part. ANSYS Topology Optimization software was applied to the model. The software uses an iterative process to remove low stress material and recalculate stress within the part until no more material can be removed without exceeding a target maximum stress value. Following topology optimization, DFMAM principles were applied to enable the part to be 3D printed. Results from the FEA showed the DFMAM optimized design to be 41.5% lighter than the original design. The maximum stress increased from 41.2% of the material yield strength to 61.5% in the DFMAM optimized design, which exceeded the target optimization value of 50% yield strength. Analysis results were verified experimentally. The original design and DFMAM optimized design were printed using an EOS M 290 metal additive manufacturing machine. Parts were separated from the support structure and tested on a universal testing machine. A custom testing apparatus was designed and built to conduct the testing. Testing was performed at 15 degrees intervals throughout the range of motion. Strain gages attached to the arm of the crank were used to obtain stress values at specific locations and dial indicators were used to measure the deflection of the crank arm under load. Experimental results closely matched results obtained from the FEA, validating the model. With the model validated at specific locations, it was assumed that the stress calculated by the FEA at the critical points were also accurate. The results showed the topology optimization software to be an effective and useful tool for optimizing the design of 3D metal printed parts. However, topology optimization alone was not enough to finalize a design prior to printing. The application of DFMAM principles were needed to ensure that the overhanging structures would not collapse during printing. Because the determination of what constitutes an overhang is determined by the part orientation when printed, some modification will generally be required prior to printing. In conclusion, using a bicycle spider-crank as an example, this research has shown that the use of topology optimization software and Design for Metal Additive Manufacturing principles is able to reduce the weight of a 3D metal printed part while simultaneously achieving a maximum stress near a target value.

A multi-level 3D data registration approach for supporting reliable spatial change classification of single-pier bridges

2018 ◽  
Vol 38 ◽  
pp. 187-202 ◽  
Author(s):  
Vamsi Sai Kalasapudi ◽  
Pingbo Tang ◽  
Wen Xiong ◽  
Ying Shi
Keyword(s):  
Spatial Change ◽  
Data Registration ◽  
3D Data ◽  
Multi Level

Linear Statics Analysis of the Connecting Rod of a Certain Type of Continuous Mill with Mechanics Properties

2012 ◽  
Vol 252 ◽  
pp. 98-101
Author(s):  
Chang Ping Zou ◽  
Xiao Feng Zhang ◽  
De Rong Cheng ◽  
Xu Zhi Lu
Keyword(s):  
Large Scale ◽  
Integrated Design ◽  
Continuous Mill ◽  
Connecting Rod ◽  
Analysis Software ◽  
Element Analysis ◽  
Fea Model ◽  
3D Fea ◽  
Set Up ◽  
3D Solid

The connecting rod of a certain type of continuous mill early produces crackle,cannot work,hindering the production.The authors are entrusted with the 3D Finite Element Analysis (FEA) of the connecting rod.On SUN workstation,utilizing the large scale Integrated-Design Engineering Analysis Software,I-DEAS,the authors have constructed accurate 3D solid model of the connecting rod,set up effective 3D FEA model,found the solution of several kinds of law of stress distribution and deformation,reached valuable conclusions.

The Optimization Design of Dental Implant after the Mandible Tumor Resection and Reconstruction

2013 ◽  
Vol 702 ◽  
pp. 318-322
Author(s):  
Wen Zheng Wu ◽  
Ji Zhao ◽  
Lei Zhang ◽  
Xing Tian Qu ◽  
Di Zhao ◽  
...  
Keyword(s):  
Optimization Design ◽  
Tumor Resection ◽  
Biomechanical Analysis ◽  
Secondary Surgery ◽  
Element Analysis ◽  
Fea Model ◽  
3D Fea ◽  
Mandible Defect ◽  
Operation Cost

Mandible defect and the lack of dentition may result in facial deformity and chewing organ defects. It happens after the surgery of oral and maxillofacial tumors. This study aims at this problem. In this study, Finite Element Analysis (FEA) was employed to reconstruct the implanted mandible for customized patient. The 3D FEA model has great importance for biomechanical analysis. Though the analysis of the biomechanical situation with different numbers of dental implants, we can optimize the location and quantity of the implants. In this way, we can improve the quality of the implants, reduce the pain of patients, reduce the operation cost and avoid secondary surgery.

Sign in / Sign up

Export Citation Format

Share Document