摘要
Abstract
Objective To compare the computerized phonetic parameters of the patients with titanium and polymethylmethacrylate (PMMA) resin-based dentures and to discuss the influence of denture base on the phonetics of patients. Methods The first concentrated frequency area (CFA1)of consonant /x/,/sh/,/r/,/zh/,/ch/,/j/,/q/and the voice onset time (VOT) of /g/,/k/,/zh/,/chi/,/j/,/q/were statistically analyzed in the same patients while wearing titanium denture and PMMA denture.The CSL Model 4150 (KAY, US) and PRAAT4.4.34 (KAY, US) software were used in this study.In addition, the 3D spectrograms of velar stops were compared between the two circumstances.Results The consonant articulation data showed significant differences between the two types of dentures. The CFA1 values of /x/,/sh/,/r/,/zh/,/ch/,/j/and/q/ when the patients wearing titanium dentures were lower than the data when wearing PMMA dentures(P＜0.05). The VOTs of/zh/,/ch/and/j/ in titanium group were higher than those of the PMMA group(P＜0.05). The VOTs of /g/and/k/ in titanium group were lower than the PMMA group(P＜0.05).A redundant spike located prior to the inherent spike could be observed in the /g/and/k/ spectrograms of 78.6％ of the patients while wearing PMMA-based dentures. However, no similar results were observed when they wore titanium dentures. Conclusion The results indicate that the thinner the glosso-palate base plate, the better the phonetic rehabilitation outcome will be. Therefore, the titanium denture base is recommended as a more suitable choice for the patients because it can reduce the thickness of glosso-palate base plate and then facilitate the recovery of phonetic functions. CFA1 and VOT based CSL are effective phonetic parameters to analyze the speech intelligibility of patients with complete dentures.关键词
全口义齿/无牙颌/辅音/语音学/钛
