Análisis lineal y no lineal de los esfuerzos en pilares de circonio preformados. Elementos finitos/LINEAR AND NONLINEAR ANALYSIS EFFORTS IN ABUTMENTS OF PREFORMED ZIRCONIUM. FINITE ELEMENT/ANÁLISE LINEAR E NÃO-LINEAR DE ESFORÇOS NOS PILARES DO ZIRCÓNIO PREFORMADOS. ELEMENTOS FINITOS

• Published in: Revista de ingeniería biomédica Vol. 8; no. 16; p. 39
• Main Authors: Valencia, Frank Marcel Roldán, Restrepo, Julio César Escobar, Correa, Federico Latorre, Ossa, Junes Villarraga
• Format: Journal Article
• Language: Spanish
• Published: Medellín Escuela de Ingeniería de Antioquia, Sede de Las Palmas 01.07.2014
• ISSN: 1909-9762; 1909-9991

The purpose of this study was to determine the mechanical behavior between Zimmer zirconium implant abutments with and without a titanium washer at their base, by using the finite element analysis (FEA). Two models of a zirconium abutment on implants were designed, composed of a Zimmer titanium implant a fixation screw, cortical and cancellous bone, and the ceramic crown of an upper central incisor. An oblique force was applied with a magnitude of 200N, ascending in a scale of 200N until any of the components of the model exhibited a nonlinear behavior. Von Mises stresses were calculated for each element. No significant differences on von Mises stresses were observed between the abutments with and without a titanium washer but differences were found at the fixation screw and the implant: the stresses were lower in the model with a titanium washer (474MPa vs 576,7MPa). Both the bone and the crown exhibited non linearity at 600N, the implant and the screw at 1,000N, and both zirconium abutments at 1,400N.