Influence of two masticating conditions on assessment of movement path stability

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概要

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• Purpose: The purpose of this study was to clarify whether differences in masticating conditions affected masticatory path stabilities of healthy subjects and TMD patients.Methods: Twenty healthy female subjects as the healthy group, and 20 female Temporomandibular Disorders (TMD) patients as the TMD group, were selected. Incisal point movement of during mastication of both masticating condition 1 (mc1; crispy bread chewed until swallowing on the free side) and masticating condition 2 (mc2; softened chewing-gum chewed for 20 s on the habitual side) were recorded by MKG. As for mc1, out of all cycles during mastication only those cycles on the habitual chewing side were analyzed. As for mc2, the ten cycles from the fifth cycle were analyzed. For these analyzed sections, the indicators representing movement path stability were calculated and compared between the two groups.Results: As for mc1, though the values of the indicators representing path stability were larger for the TMD group, there were cases where no significant differences were found between the two groups. As for mc2, the values were significantly larger for the TMD group (SDs; P < 0.05, SD/ODs; P < 0.01).Conclusions: From these results, it was suggested that the differences in masticating conditions affected the assessment of masticatory path stabilities of healthy subjects and TMD patients and the conditions should be considered for analyzing masticatory movement.

• 社団法人 日本補綴歯科学会の論文

著者

• Shiga Hiroshi

  Department Of Fundamental Energy Science Graduate School Of Energy Science Kyoto University

• Nakajima Kunihisa

  Department Of Nuclear Energy System Japan Atomic Energy Research Institute

• Arakawa Ichiro

  Department Of Partial And Complete Denture School Of Life Dentistry At Tokyo The Nippon Dental Unive

• Kobayashi Yoshinori

  Department Of Applied Physics Faculty Of Science Science University Of Tokyo

• Yokoyama Masaoki

  Department Of Partial And Complete Denture School Of Life Dentistry At Tokyo The Nippon Dental Unive

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