生理的機能を利用した咬合高径決定法に関する研究

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In order to clarify stability of the mandibular rest position and enunciation positions, recordings at various rest and enunciation positions were made of 30 normal dentulous subjects and one edetulous subject. For five of the dentulous subjects, a total of five recordings were made with one recording made on a given day. For the edentulous subject, nine kinds of experimental mandibular full dentures with various occlusal vertical dimensions were prepared and all recordings were made on same day. The results were as follows : 1. Interocclusal distance at incisal point of voluntary rest position averaged 0.92±0.51 mm, which was the smallest of all the mandibular positions examined. The differences between the subjects were small and this method proved to be accurate for determining properness of occlusal vertical dimension. 2. Interocclusal distance at incisal point immediately after swallowing averaged 1.15±0.89 mm and the mandibular position during the pause between the Myo-monitor stimulations averaged 1.41±1.22 mm. The differences in the measurements taken on different experiment days were smaller than the difference for the voluntary mandibular rest position. 3. Of the positions for 'a' column sounds and 'sa' column sounds, interocclusal distance at incisal point of the position for enunciating 'su' sound was the smallest with 1.88±1.31 mm on the average. The differences between the subjects were small and the differences between experiment days were the smallest. 4. Of the positions after enunciating 'a' column sounds and 'sa' column sounds, the position for 'u' and 'su' was close in value to the voluntary mandibular rest position. The differences between the subjects and between experiment days were also small. 5. The position for enunciating the consonant 's' in 'sa' was close in value to that for 's' in 'yes'. Differences in the measurements between experiment days were small and this enunciating position was the most stable for enunciating 's' in Japanese. 6. Observation of changes in the mandibular rest position and enunciation positions in the edentulous subject by varying occlusal vertical dimension showed the followings : the mandibular rest position and enunciation position for 'su' ; and the mandibular position after enunciating 'u' and 'su' ; and the position for enunciating 's' in 'yes' and 'sa', all of which were considered stable among the dentulous subjects, adapted themselves relatively soon to the changes in the occlusal vertical dimensions and each position showed a relatively fixed interocclusal distance.
九州歯科学会の論文
1982-12-25

生理的機能を利用した咬合高径決定法に関する研究

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