Finite Element Analysis of the Stress Distribution Associated With Different Implant Designs for Different Bone Densities

Abstract

Purpose The main objective of this study was to investigate the influence of implant design, bone type, and abutment angulation on stress distribution around dental implants. Materials and methods Two implant designs with different thread designs, but with the same length and brand were used. The three‐dimensional geometry of the bone was simulated with four different bone types, for two different abutment angulations. A 30° oblique load of 200 N was applied to the implant abutments. Maximum principal stress and minimum principal stresses were obtained for bone and Von misses stresses were obtained for dental implants. Results The distribution of the load was concentrated at the coronal portion of the bone and implants. The stress distributions to the D4 type bone were higher for implant models. Increased bone density and increased cortical bone thickness cause less stress on bone and implants. All implants showed a good distribution of forces for non‐axial loads, with higher stresses concentrated at the crestal region of the bone‐implant interface. In implant types using straight abutments there was a decrease in stress as the bone density decreased. The change in the abutment angle also caused an increase in stress. Conclusions The use of different implant threads and angled abutments affects the stress on the surrounding bone and implant. In addition, it was observed that a decrease in density in trabecular bone and a decrease in cortical bone thickness increased stress.

Evaluation and Comparison of Stress in Divergent and Convergent Collar Designs of Implants With Different Bone Densities: A Finite Element Study

“…FEA is a powerful tool to design an implant to have a better prognosis in prosthodontic treatment planning and rehabilitation [ 3 ]. The limitation of the study was the need to simulate the clinical condition of the living bone with various muscular attachments.…”

“…A V-shape thread was incorporated into the implant model that encircled the implant body with a depth of 0.36mm, pitch 0.8mm and width 0.25mm [ 3 ].…”

“…In the literature, a prognosis of about 95% is found for successfully placed mandibular dental implants and 90% for maxillary implants. Despite the best materials used for implants, implant fixture designs, and techniques of surgery, implant failures do occur occasionally, and hence, strategies to prevent the failure of an implant should be planned [ 3 ].…”

A 3D finite element analysis for the influence of different marginal finish line design on stress distribution in posterior monolithic zirconia crown prosthetic system

“…Previous studies 23 had shown that there were two types of stress distribution in the finite element stress analysis of masticatory simulation. One was that when the masticatory force was small and the loading area was small, the stress concentration appears near the loading point.…”

Peri-implant bone resorption risk of anterior maxilla narrow single implants: a finite-element analysis

“…Even with the huge improvement in computer science in the last decades, it is still impractical to represent the microarchitecture of trabecular bone and the dental implant in the same model, due to the scale difference between the individual trabeculae (50 µm to 200 µm thickness) and the implant-crown unit (approximately 20 mm length). Therefore, in single-scale models, the porous trabecular bone is usually characterized by the averaged mechanical stiffness of the trabeculae and the marrow space [ 35 , 36 ]. Multiscale finite element analyses have been proposed to represent the complex and heterogeneous microstructure of bone in femur fracture risk studies [ 37 , 38 ], but this approach is still unusual in Dentistry.…”