Abstract
The effect of artificial palate on palatography were investigated using two different thickness plates (0.7 mm and 1.5 mm), made of thermal plastic resin, in five adult men with normal occlusion. The plates were set for two hours a day respectively, subjective or objective articulatory disorders and palatograms were observed three times, at onset, one week later, and two weeks later.
The results were as follows:
1) The sudjective or objective articulatory disorder were improved two weeks later in patients using the 0.7 mm thickness plate, but a few disorders remained in patients using the 1.5 mm thickness plate.
2) Palatograms of sound [sa] were improved to the normal pattern as time elapsed, but palatograms of sound [ci] were unchanged.
3) These results indicated that sffficient time for practicing with the artificial palate was required before palatography.
