Abstract

MARQUEZ CORDOBA, Carolina; ESCOBAR RESTREPO, Julio César; LATORRE CORREA, Federico  and  VILLARRAGA OSSA, Junes. Stress distribution on a five unit fixed partial prosthesis with intermediate abutment: biomechanical analysis using a finite element model. Rev Fac Odontol Univ Antioq [online]. 2011, vol.22, n.2, pp.153-163. ISSN 0121-246X.

INTRODUCTION: the purpose of this study is to establish the mechanical behavior between rigid and non-rigid fixed dental prosthesis of five units with an intermediate abutment using the finite element analysis (FEA). METHODS: non-metric dental traits were observed using the Standard ASUDAS and other authors, in total 165 non metric traits were examined. An x² distribution test was used to identify significant differences. Results: 31 traits showed statistical significant differences on both sides of the arches. RESULTS AND CONCLUSIONS: a five unit rigid model with 124.469 nodes and 76.215 elements and a non-rigid model with 125.130 nodes and 77.396 elements were designed. It consisted of trabecular bone, cortical bone, periodontal ligament, pulp, dentine, root, resinous cement, metal ceramic crowns and tube-lock adjustment (Sterngold^®, Implamed Attleboro MA). The fixed dental prosthesis included a central incisor, lateral incisor, canine, first and second upper premolars. A force of 200 N was applied with an oblique and vertical direction. The variables included in the model were modulus of elasticity, Poissonás ratio and non-rigid adjustment. Von Misses stresses, main, maximum and minimum, were calculated for each group.

Keywords : finite element analysis; abutment; non rigid connectors; rigid-connectors; partial fixed prosthesis.

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