Abstract
We placed full arch bite plates in the mandigble of four adult subjects who had no apparent problems with pronunciation or hearing, and raised thje vertihcal dimension of occlusion 4 and 8 mm. We then investigated the effect on the pronunciation of the one monosylable sounds/i//sa/∫a/ça//ta/ξa/ki//kja//t∫a /. We found that articulation was more difficult the greater the elvation of the vertical dimension, that there was not always a direct correlation between the clarity and degree of difficulty of articulation, and that there was a constant tendency of audio recognition as different sound regardless of the subject or the amonunt of elevation.
