Abstract:

BACKGROUND: Several studies have demonstrated that the range, thickness and morphology of oral prosthesis directly influence patient’s phonetic function. and titanium base and polymethyl methacrylate (PMMA) resin base yield different influences on phonetic function due to different thicknesses of materials.
OBJECTIVE: To analyze the phonetic parameters in one complete denture patient who wear titanium base and PMMA resin base simultaneously and investigate the influences of maxillary complete denture base on phonetic function.
METHODS: Through the use of computer-based voice analysis software PRAAT4.4.34, frequency value of the first concentrated frequency area when speaking consonant sounds /x, sh, r, zh, ch, j, q/ and voice onset time when speaking consonant sounds /g, k, zh, ch, j, q/ were statistically analyzed in the same patient who separately wear titanium complete denture base and PPMA resin complete denture base, and spectrogram of velar stops between complete denture bases was compared.
RESULTS AND CONCLUSION: MMPA resin complete denture base was to some extent poor in promoting the recovery of phonetic function owing to great base thickness. Titanium complete denture base with less thickness in the tongue or palate region would help recovery of phonetic function. Extraction and analysis of phonological parameters, such as frequency value of first concentrated frequency area and voice onset time, using CSL computer-based voice analysis system, would provide objective evidence for lamprophony analysis after wearing complete denture. Maxillary denture with thinner base in tongue and palate regions better promotes the recovery of patient’s phonetic function.