Evaluation of Stress Distribution among Various Designs of a Mandibular Implant-Retained Overdenture with Three Implants by Finite Element Analysis

Ahmadzadeh, Asadollah and Golmohammadi, Farnoosh and Naseri, MohammadAli (2015) Evaluation of Stress Distribution among Various Designs of a Mandibular Implant-Retained Overdenture with Three Implants by Finite Element Analysis. Journal of Mashhad Dental School, 39 (1). pp. 9-20.

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Abstract

Introduction: because of problems associated with dentures nowadays implant supported overdentures are used widely. Despite the high success of implants, implant failure remains a major challenge. Implant overload is a factor for cortical bone loss and implant failure. This study, evaluated 3 designs used in overdentures with three implants, using finite element analysis for their stress distribution. Materials & Methods: Using finite element method, a geometrical model of the mandible was produced with CT data and three ITI implants were placed at the midline and at the first premolar teeth. All conditions were simulated using finite element software. Three treatment bar-ball, bar and ball were considered to support the overdenture. Maximum von Mayzz stress levels were compared for all attachments and supporting bone and mandibular flexure attachment was compared in different designs. Results: Results showed that the greatest amount of stress on the bone was around the upper thread and the neck of the implants. Attachment of the ball and the bar-ball induced the greatest and the least amounts of stress to the bone around the implants respectively. The maximum stress could be seen on the ball attachment in the bar-ball design. The maximum amount of the movement was show in bar-ball attachment. Conclusions: According to the results, the bar-ball treatment plan with reducing the stability of over denture will reduce the stress around the bone of implant and ball treatment plan with increasing bone stress around the implant will increse the stability of overdenture.

Item Type: Article
Subjects: WU Dentistry. Oral surgery
Divisions: Journals > Journal of Mashhad Dental School
Depositing User: jmds jmds
Date Deposited: 21 Sep 2017 12:03
Last Modified: 21 Sep 2017 12:03
URI: http://eprints.mums.ac.ir/id/eprint/1913

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