Finite Element Analysis of the Stress Field in Peri-Implant Bone: A Parametric Study of Influencing Parameters and Their Interactions for Multi-Objective Optimization

Abstract

The present work proposes a parametric finite element model of the general case of a single loaded dental implant. The objective is to estimate and quantify the main effects of several parameters on stress distribution and load transfer between a loaded dental implant and its surrounding bone. The interactions between them are particularly investigated. Seven parameters (implant design and material) were considered as input variables to build the parametric finite element model: the implant diameter, length, taper and angle of inclination, Young’s modulus, the thickness of the cortical bone and Young’s modulus of the cancellous bone. All parameter combinations were tested with a full factorial design for a total of 512 models. Two biomechanical responses were identified to highlight the main effects of the full factorial design and first-order interaction between parameters: peri-implant bone stress and load transfer between bones and implants. The description of the two responses using the identified coefficients then makes it possible to optimize the implant configuration in a case study with type IV. The influence of the seven considered parameters was quantified, and objective information was given to support surgeon choices for implant design and placement. The implant diameter and Young’s modulus and the cortical thickness were the most influential parameters on the two responses. The importance of a low Young’s modulus alloy was highlighted to reduce the stress shielding between implants and the surrounding bone. This method allows obtaining optimized configurations for several case studies with a custom-made design implant.

Biomechanical Investigation of Patient-Specific Porous Dental Implants: A Finite Element Study

“…People who suffer from osteoporosis will inevitably have less bone stiffness, are more prone to fracture [54]. Bone quality has been examined in many studies using finite element methods [55][56][57]. Our findings concur with their conclusion that deterioration in bone quality precedes a worsening of stress and strain.…”

Applications of Finite Element in Implant Dentistry and Oral Rehabilitation

“…An example of finite element model is shown in Fig. (2) and it consists of the cortical, cancellous bone an implant and abutment [16]. The model is designed from a numerical strategy from the assembly of the different parts together and the stress distribution is studied.…”

“…The implant diameter, length, loading angle, and insertion depth has an effect on the stress distribution [8,25]. Didier et al [16] investigated the several parameters (implant diameter, length, angle of inclination, taper, Young's modulus, the thickness of the cortical bone, and Young's modulus of the cancellous bone) on stress distribution and load transfer between the dental implant and bone using a FE model. They found that the implant diameter and Young's modulus and the cortical thickness were the most influential parameters on the two responses.…”

Influence of Mechanical Properties of Dental Implants on Biomechanical Behavior: A Three-Dimensional Finite Element Analysis

“…K Bouzouina and al [20] Have studied the biomechanical behavior of dental implants has been compared by the finite element method. P Didier and al [21] Have proposed a parametric model by the method of finite elements for the general case of a dental implant loaded. Unfortunately, some complications can occur, such that a failure of osseointegration.…”