Abstract
This article provides the efficacy of palatal augmentation prosthesis（PAP） regarding speech．Treatment with PAP provides to reconstruct articulation points, to make new articulation points and manner. That is efficient for training tools. The patients with articulation disorders will be satisfied to use it. Though with PAP, acoustic changes were observed for formant frequency （F1） of some vowels. The effect of the augmentation prosthesis was less in utterance speed. Thus PAP improved articulation and intelligibility, might be very useful treatment tools.
