Abstract
A study was conducted to evaluate the influence of the pathway near intercuspal position (ICP) during chewing movements when eccentric occlusal interference wasartificially created for dysfunction.
Eight subjects were selected, and the criterion was to show a type of B-W chewing pattern. Chewing patterns were recorded by Sirognathograph Analyzing System III (Siemens, Germany).
The results were as follows:
1. Chewing patterns on the non-occlusal interference side showed significant differences for both opening-grinding path (OGP) and opening path (OP) in both frontal and horizontal planes, whereas those on occlusal interference side showed significant differences for closing-grinding path (CGP).
2. Regarding stability of the chewing pathway, the opening pathway showed more remarkable variations than the closing pathway. Significant variations in the opening-grinding path (OGP) and opening path (OP) in horizontal plane were shown onthe non-occlusal interference side.
3. A serial change of chewing patterns was more remarkable immediately after insertion of an experimental prematurity onthe non-occlusal interference side than in occlusal interference.
4. In comparison of angular measurements during movement between frontal and horizontal planes, more variations and less stability were recognized in the latter than in the former.
5. This study enabled overlapping of the displays of tooth grinding curved surfaces and the chewing pathways, contributing useful informations for a diagnosis of occlusal function.
