Finite element analysis of an implant-assisted removable partial denture with different positions of the rest arm

Shamiri, R and Das, R 2012, 'Finite element analysis of an implant-assisted removable partial denture with different positions of the rest arm', in Proceedings of the 7th Australasian Congress on Applied Mechanics (ACAM 7), Adelaide, Australia, 9-12 December 2012, pp. 201-210.


Document type: Conference Paper
Collection: Conference Papers

Title Finite element analysis of an implant-assisted removable partial denture with different positions of the rest arm
Author(s) Shamiri, R
Das, R
Year 2012
Conference name ACAM 7
Conference location Adelaide, Australia
Conference dates 9-12 December 2012
Proceedings title Proceedings of the 7th Australasian Congress on Applied Mechanics (ACAM 7)
Publisher Engineers Australia
Place of publication Barton A.C.T., Australia
Start page 201
End page 210
Total pages 10
Abstract When implants are incorporated into an existing removable partial denture, fracture of the acrylic base often occurs. The aim of this study is to analyse the effects of the rest arm position on an implant-assisted removable partial denture using finite element analysis (FEA). A Faro Arm scan was used to extract the geometrical data of a human partially edentulous mandible. A standard plus regular neck (4.8 x 12 mm) Straumann implant and titanium matrix, tooth roots and periodontal ligaments were modelled using a combination of reverse engineering in Rapidform XOR2 and solid modelling using the Solid Works CAD program. The model incorporated a removable partial denture (RPD) and was loaded with realistic bilateral forces. The commercial FEA program ANSYS Workbench 14.0 was used to analyse the stress and strain distributions in the implant assisted RPD and in the metal framework. It is found that moving the position of the rest arm from the mesial to distal side of abutment teeth improves the stress distribution in the metal framework and acrylic denture base structures. The metal frame work and acrylic structures were subjected to lower stresses in an implant-assisted removable partial denture (IARPD) with a distal arm design compared to an IARPD with a mesial arm design.
Subjects Composite and Hybrid Materials
Keyword(s) dental implant
implant-assisted
removable partial denture
resilient attachment
rest arm
Copyright notice © 2012 Engineers Australia, The Authors
ISBN 9781922107619
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