Biomechanical analysis of a radial functionally graded dental implant–bone system under multi-directional dynamic loads

Abstract

Development of new biomaterials such as FGBMs for dental clinical implant applications have been recently attracted a lot of attention due to their advantages and abilities in satisfying both mechanical and biocompatibility properties simultaneously. Drawing inspiration from the geometry of a real dental implant system, and using the properties of radial functionally graded biomaterials, a model was investigated to fabricate the artificial FGBM dental implant under periodic dynamic loads. The investigation is done using a finite element analyzer, and the problem is solved under the actual bone geometry, constraints, conditions and combined dynamic loads. The effects of radial FGBM dental implants on the stress and deformation values near the dental implant-bone interface under periodic dynamic loads are simulated. Response characteristics of FGBM implant models with different heterogeneous biomaterial parameters are determined and compared to the behavior of conventional titanium and titanium coated by a film of hydroxyapatite implants. The results show that using radial FGBM dental implants can improve the mechanical behaviors of dental implant systems regarding stress and deformation. It was also found that FGBM parameters can play an essential role in achieving an efficient biomechanical function in those systems.

Crack initiation and growth simulations of functionally graded dental implant subjected to cyclic axial loads

“…Jarahi et al 17 analyzed the stress distributions of FG dental implants, which was graded in radial directions under multidirectional dynamic loads. The effects of different parameters for FG radially distributed dental implants on stress and deformation components close the jawbone subjected to oversized sinusoidal dynamic loads has been studied in this research.…”

“…As can be seen in the researches that have been mentioned above, it is observed that some research focuses only on the study of fracture or fatigue behavior of the implant structure, but the material is not FG 1–3,5–9 . The second group of studies examines the behavior of FG implants, but none of these researches includes the study of fracture or fatigue of implants 13,14,16,17 . Therefore, there is no published fatigue fracture study on crack initiation and propagation in the FG implants.…”

“…[1][2][3][5][6][7][8][9] The second group of studies examines the behavior of FG implants, but none of these researches includes the study of fracture or fatigue of implants. 13,14,16,17 Therefore, there is no published fatigue fracture study on crack initiation and propagation in the FG implants. This is due to the high complexity in fracture analysis of FG structures on 3D complex geometries.…”