Influence of Implant Surface Topography and Loading Condition on Stress Distribution in Bone Around Implants: A Comparative 3D FEA

Abstract

A three-dimensional Finite Element Method was used to study the influence of porous coated surface topography of an implant on stress and strain distribution pattern in the cortical and cancellous bone during axial and non-axial loading. Two implants, one with porous surface topography and one with smooth surface were embedded in separate geometric models of posterior mandibular region which was generated using a CT scan data. Material properties and boundary conditions were applied. Load of 100 and 50 N were applied on to the abutment from axial and non-axial directions respectively. Porous surface topography appeared to distribute stress in a more uniform pattern around the implant with near absence of stress in the apical region of implant. Smooth surfaced implant showed high punching stress at the apex of the implant. The porous coated interface was considered to simulate the shock absorbing behavior of periodontal ligament of natural dentition. Maximum amount of stress concentration was observed in the cortical bone which plays a major role in the dissipation of the stress.

The Prosthetic Influence and Biomechanics on Peri-Implant Strain: a Systematic Literature Review of Finite Element Studies

“…Assessing the effect of the axial force, was detected the distribution of uniform stress in peri-implant bone without concentrations in a specific surface area of the implant [24,25,27,28,36]. These FEA findings are close to results of in vivo studies.…”

“…Also, implant design characteristics were described as factors causing the stress. The alteration of stress was related with implant length [21,24,29], width [21,25,26,28-31], macro-relief as thread [28,32], and micro-relief as porosity [27]. Some of the articles emphasized that stress changes were caused by platform switching connection [20-22,33].…”

Influences of Implant and Framework Materials on Stress Distribution: A Three-Dimensional Finite Element Analysis Study

“…It is possible to obtain a more detailed examination of these structures and more accurate results by increasing the number of nodes and elements of the area that is intended to be analyzed. [51][52][53] Teixeira et al stated that the stress values and distributions occurring in the bone structures that are more than 4.2 mm away from the implant are similar, so the bone marrow models farther from this distance do not change the FEA results significantly. 53 Tada et al modeled the mandibular bone in the shape of a box and stated that this practice shortened the research period, and the results obtained were more accurate.…”

Stress-strain distribution at bone-implant interface of two splinted overdenture systems using 3D finite element analysis

“…All material properties were assumed linear, homogenous and isotropic to facilitate calculation process and reduce solving time. Accordingly, two values (Young's modulus and Poisson's ratio) were assigned for each part, Table 2 10,14,18,20,27…”