2009 Fiscal Year Final Research Report

Elucidate the change of chewing trajectories caused by masticatorymuscular pain based on the principle component analysis

Research Project

Project/Area Number	19791423
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	補綴理工系歯学
Research Institution	Tohoku University
Principal Investigator	IWAMATSU Masaaki Tohoku University, 病院, 助教 (30343031)
Project Period (FY)	2007 – 2009
Keywords	咀嚼筋 / 筋痛 / 咀嚼運動 / 主成分分析
Research Abstract	In this study, a method to quantitatively describe the overall chewing trajectories and a principal component analysis to re-describe variations of already describe pathway information with lesser and independent components was used to analyze variability of the chewing trajectories. In addition, we investigate the change of chewing trajectories experimentally caused by masticatory muscular pain. As a result, it was found that variation of chewing trajectories has 7 independent principal components of which more than 93% is recorded. It was confirmed that the 7 principle components contain 4 principal components which are involved with size of pathway, the aperture directions in both the frontal plane and the sagittal plane and the width of pathway.

(3 results)