<p>The stability of an internal fixation for the mandibular condyle is an important issue for surgeons over the last decades, and different patterns are still being investigated. We aimed to study the stability of some available patterns of fixation, using a numerical model of a simulated mandible. First, an accurate geometry of the mandible bone was constructed, and it was made to reach an optimum plate that induced lower stress to the bone. Moreover, the stress concentration locations in the plates along with the strains were investigated. The displacements of the plates were also calculated by numerical methods. Our results showed that using two parallel plates was more stable than angled ones due to lower induced stress or displacement. Our model could be a tool for a better understanding of using miniplates in the mandible, but we think that some experimental work should be performed to validate these numerical data using non-human and human data accordingly. </p>