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ORIGINAL RESEARCH Table of Contents   
Year : 2019  |  Volume : 30  |  Issue : 5  |  Page : 716-721
Comparing different bar materials for mandibular implant-supported overdenture: Finite-element analysis


1 Department of Mechanical Engineering, National Research Centre, Giza, Egypt
2 Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt; Department of Oral Technology, University of Bonn, Bonn, Germany

Correspondence Address:
Dr. Mohamed I El-Anwar
Department of Mechanical Engineering, National Research Centre, 33 El Bohouth St., P.O. Box 12622 Dokki, Giza
Egypt
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijdr.IJDR_97_18

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Aim: This study was conducted aiming to optimize the selection of bar material that can minimize stresses on mandibular bone. Subjects and Methods: One finite-element model was created under ANSYS environment to evaluate the use of different materials as a bar-manufacturing material in mandibular implant-supported overdenture (OD). Model components were created on engineering computer-aided design software and then assembled under the finite-element package. A force of 200 N was unilaterally and vertically applied on the left second premolar area. Results: Within these study conditions, the polyether ether ketone bar produced the lowest Von Mises stress on OD and the maximum value of deformation. Stainless steel bar produced the maximum OD total deformation. Conclusions: Cortical and spongy bones are not sensitive to the bar material. Increasing bar material stiffness increases Von Mises stresses in the bar itself and reduces its total deformation, in what is called overconstrained system.


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