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Speech evaluation after palatal augmentation in patients undergoing glossectomy.

Viviane de Carvalho-Teles¹, Luiz Ubirajara Sennes, Ingrid Gielow

¹Rehabilitation Department, Fundação Oncocentro de São Paulo, 2396, Oscar Freire, São Paulo, Brazil 05409-012. vivicarvalhofono@yahoo.com.br

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|October 22, 2008

Summary

A palatal augmentation prosthesis significantly improved speech intelligibility and vowel formant values in Brazilian Portuguese speakers after glossectomy. This device helps restore speech clarity and acoustic characteristics post-surgery.

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Area of Science:

Speech-Language Pathology
Acoustic Phonetics
Prosthodontics

Background:

Glossectomy, a surgical procedure involving tongue removal, often leads to impaired speech intelligibility.
Palatal augmentation prostheses are designed to compensate for anatomical deficits and improve speech production.

Purpose of the Study:

To evaluate the impact of a palatal augmentation prosthesis on speech intelligibility in Brazilian Portuguese speakers post-glossectomy.
To analyze the effects of the prosthesis on acoustic spectrographic characteristics of oral vowels, specifically F1, F2, and F3 formants.

Main Methods:

A blinded, randomized listener judgment approach was used for speech evaluation.
Thirty-six patients who underwent various types of glossectomy were assessed with and without the palatal augmentation prosthesis.
Spontaneous speech intelligibility and spectrographic formant analysis (F1, F2, F3) of vowels were the primary outcome measures.

Main Results:

The palatal augmentation prosthesis led to a statistically significant improvement in spontaneous speech intelligibility and syllable identification (P < .05).
Significant differences were observed in F1 values for vowels /a,e,u/, F2 values for /o,ó,u/, and F3 values for /a,ó/ (P < .001).

Conclusions:

The palatal augmentation prosthesis effectively enhances speech intelligibility and syllable clarity for individuals following glossectomy.
The prosthesis positively influences vowel formant values (F1, F2, F3), bringing them closer to normal acoustic targets and improving speech production.