Abstract:To clarify the correlation between the changes in the status of the occlusion system and the systemic posture, an investigation of the states of denture wearing in edentulous and changes in their body sways associated with occlusal support was made, focusing on the postural reflex. Body sway was assessed under four conditions : during clenching, centric occlusion, the rest position wearing upper and lower dentures and during the rest position with no dentures.The following results were obtained :1. The standard deviation in the X component (right-left direction) of body sway was significantly larger during the rest position without dentures than during either of the rest position, centric occlusion, or clenching with dentures.2. The differences in the standard deviations in the Y component (anterior-posterior direction) were not significant among the above four conditions.3. The distance of body sway during the rest position with dentures was significantly larger than any distance during centric occlusion or clenching with dentures, or during the rest position without dentures.

No abstract

Median and interquartile range (IQR) of X-S. D., Y-S. D. and migration distance of gravity center with and without mouth guard p-value (Wilcoxon signed ranks test compared with two groups) Median (IQR) (cm)