Study on statics and fatigue analysis of dental implants in the descending process of alveolar bone level

2020 ◽  
Vol 234 (8) ◽  
pp. 843-853
Author(s):  
Xuetao Zhang ◽  
Jian Mao ◽  
Yufeng Zhou ◽  
Fangqiu Ji ◽  
Xianshuai Chen
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dental Implants ◽  
Alveolar Bone ◽  
Failure Process ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Bone Level ◽  
Implant System

Alveolar bone atrophy can directly cause a decrease in bone level. The effect of this process on the service life of dental implants is unknown. The aim of this study was to determine the failure forms of the two-piece dental implants in the descending process of alveolar bone level, and the specific states of the components during the failure process. The CAD software SolidWorks was used to establish the model of alveolar bone and dental implants in this article. The finite element analysis was used to analyze the statics of the dental implants in the host oral model. The finite element analysis results showed that the stress concentration point of the implant and abutment in the implant system has changed greatly during the descending process of alveolar bone level, and indirectly increased the fatigue life of the same fatigue risk point. At the same time, the dental implants were tested in vitro in the descending process of alveolar bone level. Then, the fracture of the implant system was scanned by scanning electron microscope. The fatigue test results proved the finite element analysis hypothesis the central screw first fractured under fatigue and then caused an overload break of the implant and abutment.

scholarly journals Three-Dimensional Finite Element Analysis to Evaluate Stress Distribution in Tooth and Implant-Supported Fixed Partial Denture–An In Vitro Study

2020 ◽  
Vol 8 (03) ◽  
pp. 084-091
Author(s):  
Himani Jain ◽  
Tarun Kalra ◽  
Manjit Kumar ◽  
Ajay Bansal ◽  
Deepti Jain
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Alveolar Bone ◽  
Three Dimensional ◽  
In Vitro Study ◽  
Stress Concentrations ◽  
Element Analysis ◽  
Three Dimensional Finite Element

Abstract Introduction This study was undertaken to assess the influence of different superstructure materials, when subjected to occlusal loading, on the pattern of stress distribution in tooth-supported, implant-supported, and tooth implant-supported fixed partial prostheses, using the finite element analysis with a comparative viewpoint. Materials and Methods The geometric models of implant and mandibular bone were generated. Three models were created in accordance with the need of the study. The first model was given a tooth-supported fixed partial prosthesis. The second model was given tooth implant-supported fixed partial prosthesis, and the third model was given implant-supported fixed partial prosthesis. Forces of 100 N and 50 N were applied axially and buccolingually, respectively. Results The present study compared the stresses arising in the natural tooth, implant, and the whole prostheses under simulated axial and buccolingual loading of three types of fixed partial dentures, namely, tooth-supported, tooth implant-supported, and implant-supported fixed partial dental prostheses using three different types of materials. Conclusion The pattern of stress distribution did not appear to be significantly affected by the type of prosthesis materials in all models. The maximum stress concentrations were found in the alveolar bone around the neck of the teeth and implants.

Burst Capacity of Reinforced Thermoplastic Pipe (RTP) Under Internal Pressure

2011 ◽  
Author(s):  
Yong Bai ◽  
Fan Xu ◽  
Peng Cheng ◽  
Mohd Fauzi Badaruddin ◽  
Mohd Ashri
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Internal Pressure ◽  
Mathematical Analysis ◽  
Low Cost ◽  
Failure Process ◽  
Shell Element ◽  
Element Analysis ◽  
Burst Strength ◽  
The Finite Element Analysis

Being corrosion resistant, light weight, and easy to install at relatively low cost, Reinforced Thermoplastic Pipe (RTP) is now increasingly being used for offshore operations. RTP pipe in this study is mainly composed of three layers: a wound high strength fiber reinforced layer to improve the resistance of the pipe to internal pressure; a plastic inner layer to transport fluid; a plastic outer layer to protect the pipe. A precise calculation of the burst strength of RTP pipe will be useful for the safe use of RTP pipe’s internal pressure resistance. The Finite Element Analysis (FEA) method and mathematical analysis are employed to study the properties of pipe under internal pressure. The Finite Element Analysis method is used to simulating the pipe under increasing internal pressure using ABAQUS. The model is established with the conventional shell element, and the anisotropic property of plastic is also considered in the model. In the mathematical analysis, the reinforcement layer of the pipe is assumed to be anisotropic and other layers are assumed to be isotropic. Based on the three-dimensional (3D) anisotropic elasticity theory, an exact elastic solution for burst strength of the pipe under internal pressure has been studied. This paper focus on the calculation of RTP pipe’s burst strength, using mathematical approach and FEA approach, on the basis of elaborated study of RTP pipe’s failure process. Our results from mathematical and FE simulation agree each other for burst pressure of the RTP pipe. Our FEA models are also compared with the experimental research in order to validate our FEA models.

scholarly journals EFFECTS OF DENTAL IMPLANT LENGTH AND BONE QUALITY ON BIOMECHANICAL RESPONSES IN BONE AROUND IMPLANTS: A 3-D NON-LINEAR FINITE ELEMENT ANALYSIS

2005 ◽  
Vol 17 (01) ◽  
pp. 44-49 ◽  
Author(s):  
CHUN-LI LIN ◽  
YU-CHAN KUO ◽  
TING-SHENG LIN
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dental Implant ◽  
Bone Quality ◽  
Cancellous Bone ◽  
Alveolar Bone ◽  
Element Analysis ◽  
Linear Finite Element ◽  
Implant System ◽  
Implant Length

The aim of this study was to evaluate the influence of implant length and bone quality on the biomechanical aspects in alveolar bone and dental implant using non-linear finite element analysis. Two fixture lengths (8 and 13mm) of Frialit-2 root-form titanium implants were buried in 4 types of bone modeled by varying the elastic modulus for cancellous bone. Contact elements were used to simulate the realistic interface fixation within the implant system. Axial and lateral (buccolingual) loadings were applied at the top of the abutment to simulate the occlusal forces. The simulated results indicated that the maximum strain values of cortical and cancellous bone increased with lower bone density. In addition, the variations of cortical bony strains between 13mm and 8mm long implants were not significantly as a results of the same contact areas between implant fixture and cortical bone were found for different implant lengths. Lateral occlusal forces significantly increased the bone strain values when compared with axial occlusal forces regardless of the implant lengths and bone qualities. Loading conditions were found as the most important factor than bone qualities and implant lengths affecting the biomechanical aspects for alveolar bone and implant systems. The simulated results implied that further understanding of the role of occlusal adjustment influencing the loading directions are needed and might affect the long-term success of an implant system.

The influence of implant body and thread design of mini dental implants on the loading of surrounding bone: a finite element analysis

2017 ◽  
Vol 62 (4) ◽  
pp. 393-405 ◽  
Author(s):  
Arpad Toth ◽  
Istabrak Hasan ◽  
Christoph Bourauel ◽  
Torsten Mundt ◽  
Reiner Biffar ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dental Implants ◽  
Load Transfer ◽  
Alveolar Bone ◽  
Element Analysis ◽  
Attractive Option ◽  
Poor Tolerance ◽  
Group 3 ◽  
Surrounding Bone

AbstractMini dental implants (MDI) were once thought of as transitional implants for treatment in selected clinical situations. Their reduced diameter makes them a very attractive option for patients with poor tolerance to maxillary and mandibular prostheses. Using the method of finite element analysis, a series of different designed MDI prototypes have been investigated. The prototypes differed in the geometry of implant body and/or design of implant head. The load transfer of the implant prototypes to the idealised alveolar bone has been regarded and the prototypes have been compared to each other and to a number of standard commercial implants. The prototype models have been virtually placed in the idealised bone with a cortical thickness of 1.5 mm and loaded laterally 30° from the implant's long axis. The condition of immediate loading was assumed for the numerical analyses through defining a contact interface between the implant and bone bed. The numerical analysis in this study showed that the design of the investigated prototype MDI of group 3 (mini-ball head) is the most advantageous design.

Effects of Custom-Made and Thread Dental Implant Systems on the Stress Distribution in Alveolar Bone: A 3-Dimensional Finite Element Analysis

2013 ◽  
Vol 475-476 ◽  
pp. 1487-1493 ◽  
Author(s):  
Xiao Zhang ◽  
Zhan Gong Xie ◽  
Wei Feng ◽  
Xian Shuai Chen ◽  
Jian Yu Chen
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Dental Implant ◽  
Alveolar Bone ◽  
Element Analysis ◽  
Custom Made ◽  
Dimensional Finite Element ◽  
Stress And Deformation ◽  
Implant System

Aiming to investigate the effects of custom-made and thread dental implant systems on the stress distribution in alveolar bone using linear analysis of the finite element method (FEM). Two types of systems: the custom-made implant and the thread dental implant system, were studied using a three-dimensional finite element analysis (3D FEA). Comparing the parts of all systems for loading in different directions, the stress and deformation distribution in custom-made implant and alveolar bone are better than that in thread dental implant system. The analysis data definitely demonstrated the difference in stress and deformation distribution of components in different dental implant systems. Results show the custom-made implants are provided with more advantages and can be used in future experiment and clinical test.

Experimental Study on Displacement and Strain Distributions of Bone Model with Dental Implant

2011 ◽  
Vol 83 ◽  
pp. 73-77 ◽  
Author(s):  
Yasuyuki Morita ◽  
Yasuyuki Matsushita ◽  
Mitsugu Todo ◽  
Kiyoshi Koyano
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dental Implants ◽  
Cancellous Bone ◽  
Material Properties ◽  
Alveolar Bone ◽  
Image Correlation ◽  
Element Analysis ◽  
Deformation Distribution ◽  
Natural Tooth

For normal healthy teeth, the percussive energy generated by mastication is attenuated by the periodontal ligament at the healthy bone/natural tooth interface. However, when a natural tooth must be replaced by an implant because of damage or disease, the ligament is lost and the implant will transmit the percussive forces to the bone directly. Studies have evaluated the deformation distribution of the alveolar bone in the vicinity of implants using finite element analysis and photoelasticity. However, finite element analysis requires clinical verification or a determination of material properties, and photoelastic materials generally have material properties and structure quite different from those of actual bone. Therefore, this study examined the deformation distribution around dental implants in cortical/cancellous bone experimentally using sawbone cortical/cancellous bone models. Dental implants were placed in the bone models and the displacement distribution was measured using the digital image correlation method, and the strain distribution was visualized under a compressive load that simulated the occlusion force.

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