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ePaper created 2017-03-17, 11:08:54 | version 1.38.0
K i n e s i o g r a p h i c a n a l y s i s Fig. 7 Frontal plane: masticatory cycles in predominantly unilateral mastication on the side with the less steep AFMP. Horizontal plane: masticatory cycles in predominantly unilateral mastication on the side with the advanced AFMO. Fig. 8 Unilateral masticatory cycles. Fig. 7 Fig. 8 steep AFMP (usually the one with an easy lat- eral excursion and functionally prevailing mas- ticatory side) tends to correspond to the side with the tracing that is expressed in anteriority (Fig. 7) and vice versa. This is referred to as the consistency of the tracings of laterality between the front and the horizontal planes. An AFMO tending to posteriorization is an index of laterality with a retrusive component: The entry stage of the masticatory cycle (during which the masticatory forces reach their maxi- mum intensity) tends to take place with an un- favorable condyle–fossa relationship. A lateral retrusion tends to create a compression of the retrodiscal tissue, hindering proper mastication and encouraging mastication on the contralat- eral side (Fig. 8). By decreasing the steeper slope and the lat- eral tracings symmetrizing the AFMP on the frontal plane, the retrusion of the corresponding AFMO tended to reduce, resulting in a regular- ization of the Gothic arch and of the Posselt volume and favoring the restoration of alternat- ing unilateral mastication (Fig. 9). Since the tracing of the Gothic arch is a horizontal section of the Posselt volume, the arch regularization determines a volume regularization that allows the jaw to move freely in mastication (Fig. 9). Therefore, analysis of lateral excursion movements with evaluation of the prevailing Journal of Oral Science & Rehabilitation Volume 3 | Issue 1/2017 65