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.
Key Words: Bone density, finite element analysis, implant