A Study on the Influence of the Stomatognathic System on Posture in Children

-Precision of the Head Sway Measuring Device and Evaluation of Reproducibility of Measurements-

Abstract

We developed a three-dimensional magnetic head sway measuring device to measure and analyze head sway for use in assessing shifts in the occlusion.
We evaluated the precision of this device and the reproducibility of measurements using this system on adult subjects, and obtained the following results:
1. This device can measure head sway when set up 50 cm in front of subjects with an apparent margin of error of under 0.3 mm.
2. When we measured the head sway of adults subjects in a static position using this system, the results gave convincing evidence of individual variation when standing but no convincing evidence of individual variation when sitting, from day to day or by time of day.