総義歯装着者の咀嚼機能評価に関する臨床的研究 : 正常有歯顎者と総義歯装着者の咀嚼運動の比較について

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The purpose of this study was to comparatively study and elucidate the charistics of masticatory function of the subjects with complete denture and those with normal natural dentition. The study were carried out on 20 subjects with normal natural dentition and 30 subjects with complete denture having clinically good progutosis. Masticatory movements were analyzed by electromyograrh (EMG) and sirognathograph (SGG) when the subjects were chewing peanuts and kamaboko (boiled fish paste). The results were as follows : 1. The duration of chewing cycle, closing phase, occluding phase, and EMGs burst duration (especially after tooth contact) were significantly longer in the subjects with complete denture. 2. The maximum opening distauace was significantly shorter, the maximum opening and closing velocity were significantly slower, in the subjects with complete denture. Further, the standared deviation of the coordinates of the sample points in the occluding phase was indisordered in the subjects with complete denture, and standard deviation of the coordinates of sample points in occluding phase were varied in complete denture wearers. 3. The frontal masticatory pattern tended to unstable and typical tear drop shape pattern was found in about 60% of the subjects with complete denture. 4. Different reactions to the test foods were observed in the subjects with normal natural dentition, while such was not noted in the cases of the subjects with normal natural dentition. These results was suggest that the masticatory function in the subjects with complete deture were obviously differ from those of normal natural dentition due to the difference in the sensory-motor-system.
社団法人日本補綴歯科学会の論文
1990-04-01

著者

鹿野洋一
岩手医科大学歯学部歯科補綴学第一講座

総義歯装着者の咀嚼機能評価に関する臨床的研究 : 正常有歯顎者と総義歯装着者の咀嚼運動の比較について

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