Maxillary Sinus Augmentation without Grafting Material with Simultaneous Implant Installation: A Three-Dimensional Finite Element Analysis

2014 ◽  
Vol 17 (3) ◽  
pp. 515-524 ◽  
Author(s):  
Xu Yan ◽  
Xinwen Zhang ◽  
Jie Gao ◽  
Yasuyuki Matsushita ◽  
Kiyoshi Koyano ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Maxillary Sinus ◽  
Three Dimensional ◽  
Sinus Augmentation ◽  
Element Analysis ◽  
Maxillary Sinus Augmentation ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

Maxillary sinus pneumatization and augmentation: A three-dimensional finite element analysis

2021 ◽  
Vol 11 (11) ◽  
pp. 1892-1900
Author(s):  
Yanbo Jiang ◽  
Ming Gong ◽  
Donghui Chen ◽  
Jiaojie Li ◽  
Hailun Zhou ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Bone Graft ◽  
Maxillary Sinus ◽  
Three Dimensional ◽  
Element Analysis ◽  
3D Finite Element ◽  
Dimensional Finite Element ◽  
Von Mises ◽  
Three Dimensional Finite Element

This study aimed to explore the biomechanical behaviors of maxillary sinus elevation with bone grafts of various heights and widths using three-dimensional (3D) finite element analysis. We constructed 27 3D finite element models according to bone graft dimensions for three maxillary sinuses. These models were classified as (i) tapered, (ii) ovoid, and (iii) square. Each maxillary sinus type was analyzed with bone graft heights of 3 mm, 6 mm, and 9 mm and mesiodistal bone graft widths of 8 mm, 10 mm, and 12 mm. Different sinus pressure of 100 Pa, 500 Pa, and 1,000 Pa was applied to each aspect of the maxillary sinus. The maximum von Mises (max-VM) stress for each bone graft model was highest in the square group. The bone graft’s max-VM stress was decreased while increasing bone graft height from 3 to 9 mm in the tapered and square groups. In the ovoid group, the max-VM stress of all bone graft models decreased when the bone graft height increased from 3 to 6 mm. Thus 6 mm is the most appropriate bone graft height for all types of maxillary sinus elevation.

Finite Element Analysis of Nonuniformity of Tires with Imperfections5

2007 ◽  
Vol 35 (3) ◽  
pp. 226-238 ◽  
Author(s):  
K. M. Jeong ◽  
K. W. Kim ◽  
H. G. Beom ◽  
J. U. Park
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Element Model ◽  
Radial Force ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Dimensional Finite Element ◽  
Force Variation ◽  
Three Dimensional Finite Element

Abstract The effects of variations in stiffness and geometry on the nonuniformity of tires are investigated by using the finite element analysis. In order to evaluate tire uniformity, a three-dimensional finite element model of the tire with imperfections is developed. This paper considers how imperfections, such as variations in stiffness or geometry and run-out, contribute to detrimental effects on tire nonuniformity. It is found that the radial force variation of a tire with imperfections depends strongly on the geometrical variations of the tire.

scholarly journals Three-Dimensional Finite Element Analysis of Stress Distribution in a Tooth Restored with Full Coverage Machined Polymer Crown

2021 ◽  
Vol 11 (3) ◽  
pp. 1220
Author(s):  
Azeem Ul Yaqin Syed ◽  
Dinesh Rokaya ◽  
Shirin Shahrbaf ◽  
Nicolas Martin
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Three Dimensional ◽  
Intraoral Scanner ◽  
Element Analysis ◽  
Dental Ceramic ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element ◽  
Ceramic Crown

The effect of a restored machined hybrid dental ceramic crown–tooth complex is not well understood. This study was conducted to determine the effect of the stress state of the machined hybrid dental ceramic crown using three-dimensional finite element analysis. Human premolars were prepared to receive full coverage crowns and restored with machined hybrid dental ceramic crowns using the resin cement. Then, the teeth were digitized using micro-computed tomography and the teeth were scanned with an optical intraoral scanner using an intraoral scanner. Three-dimensional digital models were generated using an interactive image processing software for the restored tooth complex. The generated models were imported into a finite element analysis software with all degrees of freedom concentrated on the outer surface of the root of the crown–tooth complex. To simulate average occlusal load subjected on a premolar a total load of 300 N was applied, 150 N at a buccal incline of the palatal cusp, and palatal incline of the buccal cusp. The von Mises stresses were calculated for the crown–tooth complex under simulated load application was determined. Three-dimensional finite element analysis showed that the stress distribution was more in the dentine and least in the cement. For the cement layer, the stresses were more concentrated on the buccal cusp tip. In dentine, stress was more on the cusp tips and coronal 1/3 of the root surface. The conventional crown preparation is a suitable option for machined polymer crowns with less stress distribution within the crown–tooth complex and can be a good aesthetic replacement in the posterior region. Enamic crowns are a good viable option in the posterior region.

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