Abstract
A three-dimensional finite-element model of a human mandible is presented, and the stresses and deformations computed for loading states induced by two different gnathologic reconstructions using six and four implants are discussed. Occlusal canine guidance and posterior and anterior group functions on cantilevered and distally supported prostheses have been simulated. The stress distributions generated by the different loading conditions on either the osseointegrated prosthesis or the bone tissue surrounding the implants are described. The analysis of the stress distribution on the working side reveals that the posterior group function undergoes a reduction in stress intensity on the cortical bone surrounding the implants (especially for the distal implant) compared with the anterior group function and canine guidance in both gnathologic reconstructions.
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