Finite Element Analysis of Dental Implants with Zirconia Crown Restorations: Conventional Cement-Retained vs. Cementless Screw-Retained

Abstract

The present study was designed to compare the stress distributions in two restoration types of implants and the surrounding bone. The first restoration type was a conventional cement-retained zirconia crown, and the second was a novel cementless screw-retained zirconia crown with a base abutment. A three-dimensional finite element method was used to model the implants, restorations, and supporting bone. A comparative study of the two implants was performed under two masticatory loads: a vertical load of 100 N and a 30-degree oblique load of 100 N. Under both loading conditions, the maximum von Mises stress and strain values in the implant and supporting bone were higher in the conventional cement-retained restoration model than in the cementless screw-retained model. In terms of stress distribution, the cementless screw-retained zirconia crown with base abutment may be considered a superior restoration option compared to the conventional cement-retained zirconia crown.

3D printed polylactide‐based zirconia‐toughened alumina composites: fabrication, mechanical, and in vitro evaluation

“…Figure 5 illustrates the Von Mises stress distribution and total deformation for the 3D printed PLA, PZT5, PZT10, and PZT20 specimens 48 . Irrespective of the experimental values determined from the real‐time mechanical measurements which has been performed under the fixed loading conditions, here in the FEA tests, the applied force has been varied to determine the equivalent tensile testing 49,50 . Accordingly, the applied force has been varied along the + x ‐axis with its opposite counterpart— x ‐axis being fixed to perform the tensile strength analysis.…”

“…48 Irrespective of the experimental values determined from the real-time mechanical measurements which has been performed under the fixed loading conditions, here in the FEA tests, the applied force has been varied to determine the equivalent tensile testing. 49,50 Accordingly, the applied force has been varied along the + x-axis with its opposite counterpartx-axis being fixed to perform the tensile strength analysis. With the PLA being the dominant component in all the PLA/ZTA composites, the maximum Von Mises stress and In continuation with the Von Mises stress, the values computed from the shear stress simulation (Figure 6) displayed a similar effect on the enhanced ceramic load in PLA, 51 thus indicating a negative effect on the resultant property.…”

Stress Concentration of Endodontically Treated Molars Restored with Transfixed Glass Fiber Post: 3D-Finite Element Analysis

“…Therefore, the aim of the present study was to evaluate the stress distribution in endodontically treated molars restored with both transfixed or vertical glass fiber posts and resin composite under axial loads using 3D finite element analysis (3D-FEA). The use of 3D-FEA is the most widely used numerical method, allowing the reproduction of mechanical behavior under a mechanical load based on the properties of the materials [ 16 , 17 , 18 , 19 , 20 , 21 ].…”