Evaluation of the structural behavior of three and four implant-supported fixed prosthetic restorations by finite element analysis

The results from the patient analyzed showed that fixed support prostheses on three implants are not recommended from a structural point of view because they do not adequately support occlusal loads. Excessive stress in the superstructure and the cortical bone can be expected, which would anticipate the failure of the restoration. Fixed support prostheses on four implants with a cantilever length of 10 mm properly resist occlusal loading.