scholarly journals Biomechanical Evaluation of the Mandibular First Molar After Simulated Occlusal Wear Using 3D Finite Element Analysis

2022 ◽  
Author(s):  
Ke Guo ◽  
Shoufu Sun ◽  
Yueqi Shi ◽  
Ying Zhang ◽  
Wenjia Wei ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Occlusal Surface ◽  
Surface Wear ◽  
Element Analysis ◽  
Root Fracture ◽  
Vertical Root Fracture ◽  
Tooth Fracture ◽  
Occlusal Wear ◽  
Mandibular First Molar

Abstract PURPOSE：This study aimed to investigate the biomechanical basis of vertical tooth fracture occurring in the mesial root of the mandibular first molar. METHODS：We used 3D finite elements to analyze the stress distribution and transient displacement of the mandibular first molar after occlusal surface wear and tooth tilt. Based on four degrees of wear within each of the surface wear and tooth tilt groups, eight models were established in addition to the control model. A simulated bite force of 200 N was loaded on the occlusal surface, and nonlinear finite element analysis was used to explore the biomechanical basis of vertical root fracture. RESULTS：When the distal tipping angle of the abrasion plane of the mandibular first molar increased from 5° to 15°, the angle between the instantaneous displacement contours and the long axis of the tooth decreased. Meanwhile, the mesial root was found to suffer the highest stress concentration, and the possibility of longitudinal root fracture was increased. CONCLUSION: By evaluating the biomechanical effect of tooth wear and occlusal loading, we are able to identify some clinical interventions that may prevent vertical tooth fracture.

Vertical Root Fracture in Upper Premolars with Endodontic Posts: Finite Element Analysis

2009 ◽  
Vol 35 (1) ◽  
pp. 117-120 ◽  
Author(s):  
Andrea F.V. Santos ◽  
Carina B. Tanaka ◽  
Raul G. Lima ◽  
Camila O.M. Espósito ◽  
Rafael Y. Ballester ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Element Analysis ◽  
Root Fracture ◽  
Vertical Root Fracture

Wear analysis of eco-friendly non-asbestos friction-lining material applied in an automotive drum brake: Experimental and finite-element analysis

2021 ◽  
pp. 135065012110167
Author(s):  
Dinesh Shinde ◽  
Mukesh Bulsara ◽  
Jeet Patil
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Surface Wear ◽  
Analysis Model ◽  
Element Analysis ◽  
Finite Element Analysis Model ◽  
Drum Brake ◽  
Wear Analysis ◽  
Lining Material ◽  
Friction Lining

Brake friction lining material is the critical element of a braking system, since it provides friction resistance to the rotating drum for controlling automobiles. The present study involves wear analysis of newly developed eco-friendly non-asbestos friction lining material for automotive drum brake applications using experimental study, finite-element analysis, and microstructural investigations. Theoretical interpretation of braking force at different automobile speeds was derived using fundamentals. Specimen drum brake liner with eco-friendly material compositions was produced using an industrial hot compression molding process at one of the manufacturer. The surface wear of the liner was measured using an effective and accurate method. Furthermore, a finite-element analysis model was developed considering actual operating conditions and various components of the drum brake system. The model was elaborated for various result outcomes, including Von-Mises stresses and total deformation of components of the drum brake, and further used to estimate the surface wear of the friction lining material in terms of transverse directional deformation. Finally, microstructural analysis of the friction lining material was carried out using scanning electron microscopy and energy dispersive spectroscopy. From the results, it is seen that the developed friction lining material is wear resistant. The finite-element analysis model can be effectively utilized to study the tribological characteristics of friction lining materials.

3D Analysis for Identification of the Proper Type of Post to Restore the Endodontic Treated Teeth

2014 ◽  
Vol 658 ◽  
pp. 441-446
Author(s):  
Ruxandra Margarit ◽  
Stefan Sorohan ◽  
Alice Tanasescu ◽  
Constantin Dăguci ◽  
Oana Cella Andrei
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Root Canal ◽  
3D Analysis ◽  
Analysis Method ◽  
Element Analysis ◽  
Root Fracture ◽  
Finite Element Analysis Method ◽  
Endodontic Retreatment ◽  
Posterior Area

Abstract. The problem of root fracture in case of prosthetically restored non-vital teeth is a common concern among clinicians. These fractures are caused by increasing the diameter of the root canal during the endodontic retreatment and occure on the dental arches in both the anterior and posterior area. Such treatment failures lead to extraction, therefore the physician’s goal is to limit as much as possible their occurrence. We used finite element analysis method to find out what type of corono-radicular restoration is more appropriate in order to avoid fractures. We selected two of the most commun posts used in our country: metallic NiCr casted RCR (corono-radicular reconstruction) and prefabricated fiberglass endodontic posts of various diameters and we analyzed the existing tensions in the dental structures that would predispose the root to fracture.

scholarly journals Using occlusal wear information and finite element analysis to investigate stress distributions in human molars

2011 ◽  
Vol 219 (3) ◽  
pp. 259-272 ◽  
Author(s):  
Stefano Benazzi ◽  
Ottmar Kullmer ◽  
Ian R. Grosse ◽  
Gerhard W. Weber
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distributions ◽  
Element Analysis ◽  
Occlusal Wear

THEORETICAL AND FINITE ELEMENT ANALYSIS TO DETERMINE CONTACT PRESSURE, VONMISSES STRESSES AND WEAR IN CAM AND FOLLOWER FOR VARIOUS CAM ROTATIONAL ANGLES IN IC ENGINE

2019 ◽  
Vol 14 (2) ◽  
Author(s):  
Jayakumar K ◽  
Aldrin Raj J ◽  
Somesh Subramanian S
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Contact Pressure ◽  
Compressive Force ◽  
Surface Wear ◽  
Hertz Contact ◽  
Element Analysis ◽  
Ic Engine ◽  
Rotational Angle ◽  
Base Circle

The contact between the cam and follower that exists in the valve strain system of IC engine influences wear. The dynamic analysis of cam and follower system in carried to find the normal compressive force for various cam rotational angles. Based on this compressive force on the cam, the hertz contact stresses and surface wear are calculated theoretically. Finite element analysis was carried out in the three critical portions of the cam such as cam nose region, cam tangent region and cam base circle region to compare the results. The results showed that cam rotational angle directly affects the contact pressure. The max contact pressure occurs in the nose end of the cam. The results showed that principle stress and wear also increases with cam rotational angle

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