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

Abstract

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.

Effect of Biologically Oriented Preparation Technique on the Stress Concentration of Endodontically Treated Upper Central Incisor Restored with Zirconia Crown: 3D-FEA

“…During the tooth preparations different shapes and designs can be achieved, therefore generate different results that no single mechanical test can truly reproduce what the relative to tooth loading encountered in the oral environment [ 49 ]. Therefore, it is important to address the survivability of the crown–tooth [ 49 ] as well as the stress field distribution and magnitude complex rather than an individual entity.…”

“…There are some limitations presents during this finite element analysis, such as the absence of nonlinear simulation of contacts and materials with viscoelastic behaviors [ 49 ]. In addition, due to its complexity of its structure, the mechanical properties of PDL are considered simplified.…”

“…In addition, due to its complexity of its structure, the mechanical properties of PDL are considered simplified. Importantly, the viscoelastic behavior, cyclic loading and fatigue have not been performed, which should be done in further studies [ 49 ].…”

Biomechanical Aspects of Various Attachments for Implant Overdentures: A Review

“…Finite element analysis (FEA) is commonly used in stress analysis [ 34 , 35 , 36 ]. An in vitro study by Idzior-Haufa et al [ 37 ] compared the biomechanical properties of two bar-retained implants and two bar-retained implants with ball attachments for overdenture ( Figure 3 ).…”

Effect of Variable Implant Tip Distances on Stress Distribution around the Mental Foramen: A Finite Element Analysis

“…Dental implants failure was a moderately mutual problem [8], and analysis of the abutments was needed [9]. Finite Element Analysis Technique is an important system in common dental implants filed is let scholars/researchers toward read bone and dental implant characters, implant to bone union in addition to know how to modify the design of implant for the task inside the normal physiological tolerable restrictions [10]. Finite Element Analysis contains "a computerized three-dimensional model" (3D) was widely found for expect features in bone with stress distribution close to regular implant, was noted by implant geometry and bio-mechanical connection molded among implant to bone [11].…”