Finite-Element Analysis of Stress on Dental Implant Prosthesis
Application of Finite Element Analysis in Implant Dentistry
The numerical analysis was carried out using the software Straus7 of G + D Computing. The entire system was meshed by 300147 tetrahedral elements (or bricks) and 56721 nodes (). The mesh adopted was more dense at the bone-implant interface. In particular, the average size of the elements at the bone-implant interface was 0.5 mm, while 1 mm in the remaining regions. The discrete solution in terms of displacements was constrained to satisfy conditions of continuity in each interface between adjacent regions, as well as the three degrees of freedom for each node located at the end of the mandibular section were suppressed. This assumption, since the remaining part of the jaw does not offer a completely rigid support to the mandibular segment selected, was acceptable for comparative claims of the present study. A further non-linear dynamic analysis was carried out, considering the most critical scenario among obtained results, increasing the loads and disabling the cement bricks that showed compressive or tensile failure. Many 45° load (H=V) steps were considered: 30N, 60N, 120N, 240N, 500N, 600N, 800N. The compressive and tensile strength of each element were 327.8 MPa and 1 MPa respectively (). Thus, for each load step, stress state at bone-implant interface was evaluated.
Nonlinear finite element contact analysis of dental implant ..
The aim of this work was to evaluate, by means finite element analysis, the stress distribution at the bone - implant interface: at first, a linear static analysis was conducted, varying prosthetic materials and load patterns; then, a non-linear dynamic analysis was conducted, considering the most critical scenario among previous results, to assess the influence of the gradual crisis of the cement layer, subjected to increasing loads, on the stress state at the bone-implant interface.