The clinical application of acoustic analysis to evaluation of tongue position

Kaori Ishii; Kimiko Yamashita; Katsuhiko Saitoh; Satoshi Horihata; Kazutaka Kasai

The clinical application of acoustic analysis to evaluation of tongue position

Kaori Ishii, Kimiko Yamashita, Katsuhiko Saitoh, Satoshi Horihata, Kazutaka Kasai

School of Dentistry at Matsudo

Nihon University

Research output: Contribution to journal › Article › peer-review

Abstract

Tongue thrust is a habit in which the tongue protrudes between the upper and lower anterior teeth and causes malocclusion. Oral myofunctional therapy (MFT) is used to eliminate the habit of tongue-thrust swallowing. In the present study, we investigated changes in the tongue position before and after MFT using acoustic analysis. Twelve patients with tongue thrust who underwent MFT were enrolled. The first formant (F1) and the second formant (F2) of the consonant /∫/ were analyzed. To revise individual differences, F1 and F2 were divided by the fourth formant (F’4) of the vowel /i/. As a result, F1/F’4 and F2/F’4 were significantly lower after MFT than before MFT. Our results suggest that the tongue moves superiorly and posteriorly after MFT, which restores normal swallowing in patients with the tongue thrust habit.

Original language	English
Pages (from-to)	1391-1394
Number of pages	4
Journal	ICIC Express Letters, Part B: Applications
Volume	8
Issue number	10
Publication status	Published - 1 Oct 2017

Keywords

Formant
Myofunctional therapy
Tongue position
Tongue thrust

Cite this

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title = "The clinical application of acoustic analysis to evaluation of tongue position",

abstract = "Tongue thrust is a habit in which the tongue protrudes between the upper and lower anterior teeth and causes malocclusion. Oral myofunctional therapy (MFT) is used to eliminate the habit of tongue-thrust swallowing. In the present study, we investigated changes in the tongue position before and after MFT using acoustic analysis. Twelve patients with tongue thrust who underwent MFT were enrolled. The first formant (F1) and the second formant (F2) of the consonant /∫/ were analyzed. To revise individual differences, F1 and F2 were divided by the fourth formant (F{\textquoteright}4) of the vowel /i/. As a result, F1/F{\textquoteright}4 and F2/F{\textquoteright}4 were significantly lower after MFT than before MFT. Our results suggest that the tongue moves superiorly and posteriorly after MFT, which restores normal swallowing in patients with the tongue thrust habit.",

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AU - Ishii, Kaori

AU - Yamashita, Kimiko

AU - Saitoh, Katsuhiko

AU - Horihata, Satoshi

AU - Kasai, Kazutaka

PY - 2017/10/1

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N2 - Tongue thrust is a habit in which the tongue protrudes between the upper and lower anterior teeth and causes malocclusion. Oral myofunctional therapy (MFT) is used to eliminate the habit of tongue-thrust swallowing. In the present study, we investigated changes in the tongue position before and after MFT using acoustic analysis. Twelve patients with tongue thrust who underwent MFT were enrolled. The first formant (F1) and the second formant (F2) of the consonant /∫/ were analyzed. To revise individual differences, F1 and F2 were divided by the fourth formant (F’4) of the vowel /i/. As a result, F1/F’4 and F2/F’4 were significantly lower after MFT than before MFT. Our results suggest that the tongue moves superiorly and posteriorly after MFT, which restores normal swallowing in patients with the tongue thrust habit.

AB - Tongue thrust is a habit in which the tongue protrudes between the upper and lower anterior teeth and causes malocclusion. Oral myofunctional therapy (MFT) is used to eliminate the habit of tongue-thrust swallowing. In the present study, we investigated changes in the tongue position before and after MFT using acoustic analysis. Twelve patients with tongue thrust who underwent MFT were enrolled. The first formant (F1) and the second formant (F2) of the consonant /∫/ were analyzed. To revise individual differences, F1 and F2 were divided by the fourth formant (F’4) of the vowel /i/. As a result, F1/F’4 and F2/F’4 were significantly lower after MFT than before MFT. Our results suggest that the tongue moves superiorly and posteriorly after MFT, which restores normal swallowing in patients with the tongue thrust habit.

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KW - Myofunctional therapy

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The clinical application of acoustic analysis to evaluation of tongue position

Abstract

Keywords

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