A three-dimensional finite element analysis of the influence of varying implant crest module designs on the stress distribution to the bone

Abstract

Background: The aim of this study is the effect of stress distribution within the bone with varying implant crest module designs. Materials and Methods: Finite element models of a straight two-piece 4 mm × 13 mm screw-shaped threaded implant with divergent, straight, and convergent implant crest module with their surrounding suprastructure embedded in mandibular second premolar area were created with ANSYS software. Different implant crest module designs incorporated in D2 types of bone under 100N axial and 100N at 20° oblique load were created to evaluate stress distribution in the crestal bone around implant crest module. Results: Maximum von Mises stress was observed at the crestal region of the bone and at crest module region of the implants in all the models. Divergent crest module design shows minimum von Mises stress at crestal bone during vertical loading within bone and at implant crest module. Straight crest module designs result in minimum stresses during oblique loading than vertical loading. Convergent crest module design shows maximum von Mises stress. Conclusion: Within limitations of the study, it was concluded that stress distribution in adjacent compact bone is greatly influenced by implant crest module design. Divergent crest module designs result in minimum stresses at crestal bone and in the implant crest module region, followed by straight and convergent crest module in ascending order of stress distribution.

Evaluation of stress distributions of calcium silicate-based root canal sealer in bulk or with main core material: A finite element analysis study

“…Structural failure or fracture occurs when the von Mises stress values surpass the yield strength of the tooth, as highlighted in previous research [ 39 ]. The location of the maximum von Mises stress in the FEA model indicates the area where stress concentration is likely to initiate a crack [ 40 ].…”

Zonas de estrés en implantes dentales sinterizados valorados por elemento finito

“…El diseño del módulo de la cresta diverge de la tensión de von Mises mínima en el hueso crestal durante la carga vertical dentro del hueso también en el módulo de cresta del implante. Los diseños de cresta recta tuvieron mínima tensión a carga oblicua que, a la vertical, la cresta convergente muestra la máxima tensión de von Mises [17][18][19] . Los resultados del FDS coinciden en valores inferiores a 1.23 localizados en la corona, concentrando los esfuerzos resistentes que soportan las cargas masticatorias, lo que contrasta con lo encontrado por Westover et al, donde se ubica la concentración de tensión en la parte de conexión del implante, especialmente por encima del tejido blando y dentro del hueso.…”