Objective: Fixed-fixed bridge material selection was numerically investigated, by comparing stresses and deformation distributions on bone and bridge body. Materials and methods: A 3D finite element model was created by using a 3D contact scanner. A model bridge with missing maxillary first bicuspid and prepared abutments was scanned. Wide range of partial denture materials was tested in this study. The cement layer was ignored. The model was subjected to a compressive vertical load of 500N applied at the central fossa of the pontic. Results and disscusion: Linear static analyses were carried out. Whatever the bridge material, location of maximum Von Mises stress was found on the abutment finish line towards the pontic. On the other hand, maximum total deformation was found on abutment top towards the pontic. Conclusions: Finish line contact with fixed artial denture should necessarily avoid stress concentration. Bone may be insensitive to bridge materials.
Keywords:- finite element analysis
- fixed-fixed bridge
- PEEK
- zirconia