3D-FE analysis of functionally graded structured dental posts

Abstract

This study aimed to compare the biomechanical behaviour of functionally graded structured posts (FGSPs) and homogenous-type posts in simulated models of a maxillary central incisor. Two models of FGSPs consisting of a multilayer xTi-yHA composite design, where zirconia and alumina was added as the first layer for models A and B respectively were compared to homogenous zirconia post (model C) and a titanium post (model D). The amount of Ti and HA in the FGSP models was varied in gradations. 3D-FEA was performed on all models and stress distributions were investigated along the dental post. In addition, interface stresses between the posts and their surrounding structures were investigated under vertical, oblique, and horizontal loadings. Strain distribution along the post-dentine interface was also investigated. The results showed that FGSPs models, A and B demonstrated better stress distribution than models C and D, indicating that dental posts with multilayered structure dissipate localized and interfacial stress and strain more efficiently than homogenous-type posts.

Influence of inhomogeneous dental posts on stress distribution in tooth root and interfaces: Three-dimensional finite element analysis

“…A constant value (68.9×10 -3 GPa) was considered for the elastic modulus of PDL according to published data. [7][8][9][10][11]13 This value is a significant simplification for the FEA. In fact, the values for the elastic modulus of PDL vary depending on loading, 26,27 meaning that at the beginning of loading, the elastic modulus values are low and increase as loading continues.…”

“…Perfect bonding was assumed at all interfaces of components without any gaps at the interfaces. 13 Mesh sensitivity analysis was performed to reveal the appropriate size for the elements. All models were meshed by about 110 000 ten-node tetrahedral elements (C3D10 in Abaqus) and 191 000 nodes.…”

Functional Biomimetic Dental Restoration

“…[85]. The results were evaluated in comparison to those of posts constructed from a single homogeneous material such as titanium and zirconia.…”

Application of Calcium Phosphate Materials in Dentistry

“…Abu Kasim et al [174] investigated the stress distribution of a newly designed functionally graded dental post (FGDP) which consisted of multilayer design of ZrO 2 -Ti-HA and compared to posts fabricated from homogeneous material such as titanium and zirconia. They concluded that FGDP exhibited several advantages in terms of stress distribution compared to posts fabricated from homogeneous material.…”