Speech intelligibility in patients with complete dentures according to the material used.
The principal purpose of this study was to investigate the speech of two edentulous subjects fitted with a complete maxillary prosthesis made of three different palatal materials: aluminium, resin, stellite. The study was performed using two speakers fitted with a prosthesis (a man and a woman). They took part in the acoustic recording of logatoms read by themselves while wearing various prostheses. These recordings were tested from the auditory point of view by a series of six listeners (four men and two women) in an anechoic room. After 144 different tests, a speech reception threshold (SRT) was defined for each speaker and each different prosthesis. This SRT shows a level of speech intelligibility defined so that the lower the SRT, the more intelligible for the listener. The results show that: (i) both the material and the listener influence SRT: (P < 0.05); (ii) an interaction between the material factor and the speaker factor appears. (P < 0.05); (iii) The hierarchy factors influencing SRT are most important in the order: Listener --> material --> speaker; and (d) The group fitted with a metal prosthesis (aluminium, stellite) was more intelligible regarding the way they were perceived by others.
Service d'Odontologie, Hôpital Nord, Marseille, France.
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Foti
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Tavitian
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Bonfil
D000180:Acrylic Resins; D000368:Aged; D000369:Aged, 80 and over; D000535:Aluminum; D000704:Analysis of Variance; D002858:Chromium Alloys; D003035:Cobalt; D003779:Denture Design; D003824:Denture, Complete; D005260:Female; D006801:Humans; D008297:Male; D009066:Mouth, Edentulous / Q000503:physiopathology* / Q000534:rehabilitation; D013065:Speech Intelligibility; D013068:Speech Production Measurement
D000180:Acrylic Resins; D002858:Chromium Alloys; D003035:Cobalt; D000535:Aluminum