Biomechanical analysis of rigid and non-rigid connection with implant abutment designs for tooth-implant supported prosthesis: A finite element analysis

The purpose of this research was to study the behavior of cold-formed steel cantilever truss structures. A cantilever truss structure and bolt-moment connection were tested and verified by the 3D-finite element model. The verification results showed a good correlation between an experimental test and finite element analysis. An analytical method for elastic rotational stiffness of bolt-moment connection was proposed. The equation proposed in the analytical method was used to approximate the elastic rotational stiffness of the bolt group connection, and was also applied to the Richard-Abbott model for generating the nonlinear moment-rotation curve which modeled the semi-rigid connection stiffness. The 2D-finite element analysis was applied to study the behavior of the truss connection, caused by semi-rigid connection stiffness which caused a change of force to the truss elements. The results showed that the force in the structural members increased by between 13.62%-74.32% of the axial forces, and the bending moment decreased by between 33.05%-100%. These results strongly suggest that the semi-rigid connection between cold-formed steel cantilever truss structures should be considered in structural analysis to achieve optimum design, acknowledging this as the real behavior of the structure.

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Biomechanical analysis of supra-acetabular insufficiency fracture using finite element analysis

Journal of Orthopaedic Science ◽

10.1016/j.jos.2018.04.005 ◽

2018 ◽

Vol 23 (5) ◽

pp. 825-833 ◽

Cited By ~ 1

Author(s):

Hidetatsu Tanaka ◽

Go Yamako ◽

Hiroaki Kurishima ◽

Shutaro Yamashita ◽

Yu Mori ◽

...

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Insufficiency Fracture ◽

Biomechanical Analysis ◽

Element Analysis

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Relationships of Stresses on Alveolar Bone and Abutment of Dental Implant from Various Bite Forces by Three-Dimensional Finite Element Analysis

BioMed Research International ◽

10.1155/2020/7539628 ◽

2020 ◽

Vol 2020 ◽

pp. 1-9 ◽

Cited By ~ 1

Author(s):

Xiaoning Kang ◽

Yiming Li ◽

Yixi Wang ◽

Yao Zhang ◽

Dongsheng Yu ◽

...

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Dental Implant ◽

Alveolar Bone ◽

Three Dimensional ◽

Central Incisor ◽

Element Analysis ◽

Implant Abutment ◽

Dimensional Finite Element ◽

Three Dimensional Finite Element

Occlusal trauma caused by improper bite forces owing to the lack of periodontal membrane may lead to bone resorption, which is still a problem for the success of dental implant. In our study, to avoid occlusal trauma, we put forward a hypothesis that a microelectromechanical system (MEMS) pressure sensor is settled on an implant abutment to track stress on the abutment and predict the stress on alveolar bone for controlling bite forces in real time. Loading forces of different magnitudes (0 N–100 N) and angles (0–90°) were applied to the crown of the dental implant of the left central incisor in a maxillary model. The stress distribution on the abutment and alveolar bone were analyzed using a three-dimensional finite element analysis (3D FEA). Then, the quantitative relation between them was derived using Origin 2017 software. The results show that the relation between the loading forces and the stresses on the alveolar bone and abutment could be described as 3D surface equations associated with the sine function. The appropriate range of stress on the implant abutment is 1.5 MPa–8.66 MPa, and the acceptable loading force range on the dental implant of the left maxillary central incisor is approximately 6 N–86 N. These results could be used as a reference for the layout of MEMS pressure sensors to maintain alveolar bone dynamic remodeling balance.

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Biomechanical analysis of costochondral graft fracture in temporomandibular joint replacement

Scientific Reports ◽

10.1038/s41598-020-74548-1 ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Yi Mao ◽

Xuzhuo Chen ◽

Shiqi Yu ◽

Weifeng Xu ◽

Haiyi Qin ◽

...

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Mechanical Test ◽

Costal Cartilage ◽

Biomechanical Analysis ◽

Element Analysis ◽

Rib Cartilage ◽

Graft Reconstruction ◽

Costochondral Graft ◽

Graft Fracture

Abstract This study is the first attempt to explore the reason of costochondral graft fracture after lengthy mandible advancement and bilateral coronoidectomy by combining finite element analysis and mechanical test. Eleven groups of models were established to simulate costochondral graft reconstruction in different degrees of mandible advancement, ranging from 0 to 20 mm, in 2 mm increment. Force and stress distribution in the rib-cartilage area were analyzed by finite element analysis. Mechanical test was used to evaluate the resistance of the rib-cartilage complex. Results showed a sharp increase in horizontal force between 8 and 10 mm mandible advancement, from 26.7 to 196.7 N in the left side, and continue increased after 10 mm, which was beyond bone-cartilage junction resistance according to mechanical test. Therefore, we concluded that bilateral reconstruction with coronoidectomy for lengthy mandible advancement (≥ 10 mm) may lead to prominent increase in shear force and result in a costal-cartilage junction fracture, in this situation, alloplastic prosthesis could be a better choice. We also suggested that coronoidectomy should be carefully considered unless necessary.

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