Dynamic modelling and simulation of dental implant insertion process—A finite element study

Abstract

Objectives: Using the finite element technique, the stress characteristics within the mandible are evaluated during a dynamic simulation of the implant insertion process. Implantation scenarios considered are implant thread forming (S1), cutting (S2) and the combination of forming and cutting (S3). Ultimately, the outcome of this study will provide an improved understanding of the failure mechanism consequential to the stress distribution characteristics in the mandible during the implantation process. Material and Methods: Parameters considered herein include bone cavity diameters of 3.9mm (for S2), 4.25mm (for S1) and a tapered cavity of diameters linearly varying from 3.9 to 4.25mm (for S3). The bone-implant system is modelled using three-dimensional tetrahedral elements. Idealised bone and implant interaction properties are assumed. The stress profiles in the mandible are examined for all bone cavity diameters. Results and Conclusion: The stress levels within the cancellous and cortical bone for S1 are significantly reduced when compared to scenarios S2 and S3. For S3, during the initial insertion steps, the stress is marginally less than that for S2. Close to the end of the insertion process, the stress level within the cancellous bone in S3 is approximately half way between that of S1 and S2. Generally for all scenarios, as the insertion depth increases the stress increases less significantly in the cortical bone than in the cancellous bone. Overall, different implant surface contact areas are the major contributors to the different stress characteristics of each scenario.

Studying the Effect of the Preload Induced by Screw Tightening on Stress Distribution of a Dental Implant

“…The force magnitudes, and also the acting point, were chosen based on an effort of Mericske-Stern (Kayabasi et al, 2006). To delimit boundary conditions, all the points and nodes of the lateral surfaces were fixed in three directions (Kayabasi et al, 2006;Guan et al, 2011). Boundary conditions and loading are shown in figure 8.…”

Interaction of bone–dental implant with new ultra low modulus alloy using a numerical approach

“…A considerable number of experimental and numerical studies have been carried out to understand the mechanism of the load transfer from the implants to the bones [9][10][11][12][13][14][15][16]. A geometric influence has been demonstrated.…”

“…Load transfer between an implant and the surrounding bone has recently been intensively studied using Finite Element Modelling [8]. Several parameters related to the implant have to be considered, such as geometry, loading, the interaction between the implant and the cortical bone, and material properties.A considerable number of experimental and numerical studies have been carried out to understand the mechanism of the load transfer from the implants to the bones [9][10][11][12][13][14][15][16]. A geometric influence has been demonstrated.…”

Dynamic modeling and simulation of the screwing behavior of thread forming screws

“…Guan et al [2] studies the stress distribution during a dynamic simulation of the dental implant insertion process. Mathurin et al [3] determine displacements during the forming process and the shape of the threads with a 3D finite element model from a 45 degree sector (discrete rigid screw body).…”