Evaluation of stress in three different fiber posts with two-dimensional finite element analysis

Abstract

Introduction: The primary function of corono-radicular post is to provide retention for the core and to reinforce and to replace the remaining coronal tooth structure. There is considerable controversy regarding optimal choice of the material. An ideal post system should exhibit fracture resistance higher than the average masticatory forces. Finite elemental analysis (FEA) method facilitates precise analysis of the distribution and magnitude of stresses at any point of complex and irregular structures. Thus, this FEA study has been undertaken to evaluate the fracture stress distribution patterns in three fiber posts, viz., carbon, glass fiber, and everStick with an FEA. Materials and Methods: The FE stress analysis was performed with the FE software program (CATIA). Three two-dimensional FEA models of central incisor were simulated, and elastic moduli and Poisson's ratio of all the materials were fed to the software. For all the models, a 200 N vertical force was applied on the lingual surface of the tooth at an angle of 45°. Stress concentration and distribution were evaluated and noted down for all the models. To evaluate the stresses within the restored tooth, the modified von Mises failure criterion was used. The equivalent stresses found in the tested models were compared with the tensile strength of the respective materials. Contact stresses in the luting cement–dentin interface were calculated. Results: Finite element method revealed that maximum stress concentration was at the point of stress application. The stress value was highest in carbon fiber post followed by glass fiber post and least stresses found in everStick post. Maximum stress was observed at the labial surfaces of crown. However, the stress values and distribution were more homogenous in everStick post. Conclusion: The present findings suggest that everStick post has uniform stress distribution within tooth structure.

Fluoride Release and Rechargeability of Poly(lactic acid) Composites with Glass Ionomer Cement

“…Evidently, the amount of fluoride released in the PLA/GIC groups was significantly greater after the recharge regimen, whereas the control group and PLA/NaF groups showed no significant increase in fluoride release post-recharge. This is consistent with multiple studies, indicating that GIC exhibits recharging abilities [53][54][55]. Therefore, this proves that fluoride recharge occurs in the GIC filler particle.…”

Effect of Long Glass Fiber Orientations or a Short-Fiber-Reinforced Composite on the Fracture Resistance of Endodontically Treated Premolars

“…In this study, this limitation was overcome by using an injectable composite. Nevertheless, despite the restorative procedures, core build-up materials show different performances and the choice of the material should be a well-considered decision [34]. Since the materials and preparation techniques used are different, no study directly compares to the results of this study.…”

Polyether ether ketone – As an alternative biomaterial for Metal Richmond crown-3-dimensional finite element analysis

“…The dimensions of various parts in the finite element model were taken as given by various researchers and obtained from standard dental literature. [ 1 7 9 ] Three dimensional FEA model was simulated, and elastic moduli and Poisson's ratio of all the materials were fed to the software and the “finite element model geometry” was obtained on the computer screen by the provision of various entities such as grids, lines, and patches.…”

“…The finite element analysis (FEA) is an approved method for inducing biophysical phenomena in computerized teeth models and their periodontium in the finite-element method is considered an extremely useful tool for simulating the mechanical effects of chewing forces acting on the periodontal ligament and the hard-dental tissue. [ 7 ] Deformations and stresses can be assessed at any point within the model and regions with higher stresses can be analyzed. Each dimension in the elastic modulus and the Poisson's ratio are defined for the model materials.…”