Revista Facultad de Odontología Universidad de Antioquia
Print version ISSN 0121-246X
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.