ABSTRACT
Disorders in the Temporomandibular Joint (TMJ) are common among the population. In this study, the influence of mechanical gap constraints on the behavior of the TMJ were investigated with the help of a finite element model of the human masticatory system. The finite element model was run as a transient problem that incorporates the dynamic behavior of the jaw, particularly the displacement of the articular disc during jaw motion. Rigid spacers were placed on the molars at each side of the mandible, creating a displacement constraint. Different gaps were introduced by changing the vertical position of one of the rigid spacers. The introduction of a gap raises the biting force at the ipsilateral side and the joint force at the contralateral side. The change of force distribution rotates the jaw slightly and changes the distribution of stresses at the ipsilateral side and increases the stress magnitude at the contralateral side.
