抄録
Tongue movement of complete denture wearers was examined for/s/and/&int/by meansof dynamic palatography. The data as well as those changes with day were compared with those of normal speaking subjects with natural dentition.
1. Tongue ofcomplete denture wearers contacted with the hard palate sooner than that of the normal speaking subjects did, but the timing of forming maximum constriction at the anterior part of the hard palate was the same, whereas the timing of releasing the maximum constriction was later in the former.
2. Tongue movement of complete denture wearers was subjected to be under the influence of the adjacent vowel in both temporal and spatial aspects, particularly at the on-gride of the fricative.
3. The tongue-palate contact patterns for the maximum constriction had specific left-right asymmetries in each subject, which showed no significantchanges with day.
4. Tongue movement of complete denture wearers showed specific temporal asymmetries in each subject which didn't change with day, and tongue moved slightly at the midtime of the frication, the tongue tended to move awayfrom contact.
5. Variability of tongue-palate contact patterns for the maximum constriction became smaller with day, which can be used to estimate the degreeof speech adaptation to the denture.
