3D Finite Element Study on: Bar Splinted Implants Supporting Partial Denture in the Reconstructed Mandible

Mohamed El-Anwar; Rami Ghali; Mona Aboelnagga

doi:10.3889/oamjms.2016.027

Authors

Mohamed El-Anwar National Research Centre, Mechanical Engineering, Giza
Rami Ghali Faculty of Dentistry, Ain Shams University, Removable Prosthodontics, Cairo
Mona Aboelnagga Faculty of Dentistry, Ain Shams University, Removable Prosthodontics, Cairo

DOI:

https://doi.org/10.3889/oamjms.2016.027

Keywords:

Finite element method, Stress Distribution, Bar splinted implants, Reconstructed Mandible, Partial Denture

Abstract

AIM: This study aimed to estimate the stress patterns induced by the masticatory loads on a removable prosthesis supported and retained by bar splinted implants placed in the reconstructed mandible with two different clip materials and without clip, in the fibula-jaw bone and prosthesis using finite element analysis.

METHODS: Two 3D finite element models were constructed, that models components were modeled on commercial CAD/CAM software then assembled into finite element package. Vertical loads were applied simulating the masticatory forces unilaterally in the resected site and bilaterally in the central fossa of the lower first molar as 100N (tension and compression). Analysis was based on the assumption full osseointegration between different types of bones, and between implants and fibula while fixing the top surface of the TMJ in place.

RESULTS: The metallic bar connecting the three implants is insensitive to the clips material. Its supporting implants showed typical behavior with maximum stress values at the neck region. Fibula and jaw bone showed stresses within physiologic, while clips material effect seems to be very small due to its relatively small size.

CONCLUSION: Switching loading force direction from tensile to compression did-not change the stresses and deformations distribution, but reversed their sign from positive to negative.

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