The topographical location of the mandible, teeth and muscles responsible for chewing movements, gives them a central role in the morpho-functional balance of the masticatory apparatus itself, the spine and the entire kinetic chain of the body. Skull, mandible, teeth, neck, vertebral column and trunk, also, limbs and feet, constitute an INTEGRATED SYSTEM in which any deviation, physiological or pathological, from functional balance, leads to the reorganization of the system.

The balance or instability of the aforementioned integrated system constitutes the POSTURE of the body, of the musculoskeletal system and beyond.
Posture is the result of the dynamic activity of the spine and trunk muscles and changes at any time. These muscles adjust the center of gravity of the body to the solicitations of the force of gravity and of the voluntary movements of the other components that intervene in the posture itself.

The postural equilibrium occurs in the presence of curves of physiological cervical and lumbar lordosis, of thoracic kyphosis and when the head, neck, thorax and abdomen are aligned vertically, so as to distribute the weight of the body with the minimum effort of muscles and ligaments.