Comparison of stress distribution between complete denture and implant-retained overdenture-2D FEA

  1. W. G. ASSUNÇÃO,
  2. L. F. TABATA,
  3. V. A. R. BARÃO,
  4. E. P. ROCHA

Article first published online: 9 MAY 2008

DOI: 10.1111/j.1365-2842.2008.01851.x

Issue

Journal of Oral Rehabilitation

Journal of Oral Rehabilitation

Volume 35, Issue 10, pages 766–774, October 2008

Additional Information

How to Cite

ASSUNÇÃO, W. G., TABATA, L. F., BARÃO, V. A. R. and ROCHA, E. P. (2008), Comparison of stress distribution between complete denture and implant-retained overdenture-2D FEA. Journal of Oral Rehabilitation, 35: 766–774. doi: 10.1111/j.1365-2842.2008.01851.x

Author Information

  1. Department of Dental Materials and Prosthodontics, Araçatuba Dental School, São Paulo State University (UNESP), São Paulo, Brazil

*Wirley G. Assunção, Faculdade de Odontologia de Araçatuba, Department of Dental Materials and Prosthodontics – UNESP, Rua José Bonifácio, 1193, Araçatuba, São Paulo 16015-050, Brazil. E-mail: wirley@foa.unesp.br

Publication History

  1. Issue published online: 3 SEP 2008
  2. Article first published online: 9 MAY 2008
  3. Accepted for publication 9 December 2007

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Keywords:

  • dental implants;
  • overdenture;
  • attachment;
  • finite element analysis;
  • biomechanics

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.

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