Comparison of stress distribution between complete denture and implant-retained overdenture-2D FEA
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Data
2008-10-01
Autores
Assunção, Wirley Goncalves [UNESP]
Tabata, L. F.
Barao, Valentim Adelino Ricardo [UNESP]
Rocha, Eduardo Passos [UNESP]
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Editor
Blackwell Publishing
Resumo
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.
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dental implants, overdenture, attachment, finite element analysis, biomechanics
Como citar
Journal of Oral Rehabilitation. Oxford: Blackwell Publishing, v. 35, n. 10, p. 766-774, 2008.