“…The boundary conditions (the conditions tied) used to simulate the temporo mandibular joint were carried out through some springs in direction normal to condylar surfaces, distributed on the anterior-superior side of the condyles, in order to make them work only in compression. The model proposed, and already quoted in literature (Gysi, 1921;Barbenel, 1972;Champy and Lodde, 1976;Lindahl, 1977;Kubein and Jähnig, 1983;Faulkner et al, 1987;Hart et al, 1988;Iizuka et al, 1991;Ellis and Dean, 1993;Meijer et al, 1993;Krenkel, 1994;Hammer et al, 1997;Choi et al, 1999Choi et al, , 2001Meyer et al, 2002Meyer et al, , 2006Tominaga et al, 2006;Cascone et al, 2008), was created with boundary conditions in order to analyse the mechanicalestructural behaviour of the mandible during the function of the masticatory muscular forces. In our mandibular model, a right subcondylar fracture was caused and repaired through the use of union elements, having two different methods of fixation.…”