Researchers examined the effects of biomechanical occlusal loads which act on the teeth during mastication [1, 2, 3]. Because of functional reasons, the internal and external architecture of the tooth causes the increased distribution of the tension generated by the mastication forces both in the tooth and in the supporting structures and alveolar bone [4].

The pattern of tension distribution in the tooth and in its supporting tissues is influenced by the implantation of tooth, its position, the intensity and direction of the forces. Determining the nature and direction of the forces dispersed in the periodontal ligament is a critical element for a better understanding of the biological behavior of the supporting structure of the tooth, in good functional condition or occlusal trauma [3, 5]. In order to accurately assess the selective forces acting on these tooth tissues, it is important to understand the structural and functional characteristics of the mastication system. Understanding this process involves defining the type of occlusal forces resulting from the masticatory system [6].