A comparison between the stress distribution inangled and vertical implantes.
This paper describes the stress distribution in implants of different shapes, basedon 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 ma sticatory 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.