A Comparison Between The Stress Distribution In Angled And Vertical Implants

Abstract

This paper describes the stress distribution in implants of different shapes, based
on a three dimensional solid computational model. The geometry of the mandible was
obtained from a computerized tomography scan and two different designs for the implant
were considered, both part of the Bioform® system produced by Maxtron (Juiz de Fora,
Brazil). The first implant is vertical, as commonly used in dentistry practice, and the second
has an angled form. The geometric model for each implant was treated through the use of
Boolean operations in the region of the first lower molar of the model for the mandible. The
resulting geometry served as basis for the discrete finite element model, and a 100 N load was
considered, acting first in the vertical and then in the horizontal direction. For a correct
description of the forces acting during the masticatory process, the external loads were
balanced by the muscular forces acting on the mandible and reaction forces in the line
joining the temporomandibular articulations. A discussion is presented on the effectiveness
of the different implant forms in the transmission of forces to the mandible.