Objective: This study aimed to compare by finite element analysis between rhombic condylar plate and standard two miniplate
in subcondylar fixation through measuring the stresses on the plate, the stresses transmitted to bone and fracture displacement.
Material and methods : Two mandibular models were created through Mimics software. Model I: a five-hole Rhombic
non locking Plate and model II: Two four-holes miniplates. The process of finite element analysis was done by ANSYS 18.0
software.
Results : The highest stress on the plates were in rhombic plate. While the stresses on screws was higher on screws A in
rhombic plate while higher on screws B in miniplates. The maximal bone stress was the highest in the rhombic plated model.
Displacement was slightly higher in the rhombic plate model.
Conclusion: The rhombic plate showed a higher stress than the two miniplates that was mainly because of the less hardware
and numbers of screws in rhombic plate model.