犬歯の歯根膜感覚が下顎運動に及ぼす影響について

抄録

The purpose of this study was to inyestigate the effect of the periodontal sensation of canine teeth on lateral movement and masticatory movement in man. The mandibular movements of 20 healthy subjects were measured using Kyushu University 3-D movement analyzing system, before and after local anesthesia to upper and lower canine teeth.
The results were as follows.
1. The lateral movement was very stable before and after anesthesia. The stability was not affected by the periodontal sensation.
2. The chewing pattern and the chewing cycle did not alter before and after anesthesia.
3. In the group which showed small lateral displacement of the chewing path, the masticatory movement was not affected by the anesthesia.
4. In the group which showed large lateral displacement of the chewing path, the masticatory movement was not altered by the anesthesia.
5. In the group which showed intermediate lateral displacement, the amount of lateral displacement and gliding length in mastication increased after anesthesia. The amount after anesthesia was equal to that of the large lateral displacement group.
It was suggested that the lateral limitation existed in masticatory movement and the periodontal sensation of canine teeth controlled the amount of lateral displacement of mastication.