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Comparison of stress distribution between complete denture and implant‐retained overdenture‐2D FEA
Author(s) -
ASSUNÇÃO W. G.,
TABATA L. F.,
BARÃO V. A. R.,
ROCHA E. P.
Publication year - 2008
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1111/j.1365-2842.2008.01851.x
Subject(s) - dentures , mandible (arthropod mouthpart) , stress (linguistics) , implant , dentistry , abutment , orthodontics , finite element method , materials science , mandibular molar , medicine , molar , structural engineering , engineering , surgery , linguistics , philosophy , botany , biology , genus
Summary The aim of this study was to compare the stress distribution induced by posterior functional loads on conventional complete dentures and implant‐retained overdentures with different attachment systems using a two‐dimentional Finite Element Analysis (FEA‐2D). Three models representative of edentulous mandible were constructed on AutoCAD software; Group A (control), a model of edentulous mandible supporting a complete denture; Group B, a model of edentulous mandible supporting an overdenture over two splinted implants connected with the bar‐clip system; Group C, a model of edentuluos mandible supporting an overdenture over two unsplinted impants with the O‐ring system. Evaluation was conducted on Ansys software, with a vertical force of 100 N applied on the mandibular left first molar. When the stress was evaluated in supporting tissues, groups B (51·0 MPa) and C (52·6 MPa) demonstrated higher stress values than group A (10·1 MPa). Within the limits of this study, it may be conclued that the use of an attachment system increased stress values; furthermore, the use of splinted implants associated with the bar‐clip attachment system favoured a lower stress distribution over the supporting tissue than the unsplinted implants with an O‐ring abutment to retain the manibular overdenture.