Influence of Occlusion on the Gait of Patients with Post-stroke Hemiplegia

[Purpose] To clarify the influence of occlusion on the gait of patients with post-stroke hemiplegia. [Participants and Methods] Eighteen patients with primary hemiplegia after stroke and no oromandibular problems were divided into 2 groups: occlusal gait: biting down on a 3-mm-thick mouthguard sheet located on the occlusal surfaces; and control: keeping the lower jaw in rest position. The gait characteristics of the 2 groups were analyzed using a foot pressure distribution measurement system. [Results] In the occlusal gait group, there were significant increases in the gait velocity, cadence, step length on the paralyzed side, and stride length. The distance of the center of pressure (COP) travelled and its rate on the non-paralyzed side during the single-leg support period significantly increased. On the paralyzed side, there was a significant increase in the peak plantar pressure during the second double-leg support period. Additionally, significant decreases in the step width and anteroposterior and lateral changes in the point of intersection in the trajectory of COP were observed. [Conclusion] Occlusion may influence the gait balance and gait function of patients with hemiplegia.