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Effects of Hawley retainers on consonants and formant frequencies of vowels.
Angle Orthod ; 82(1): 14-21, 2012 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-21761988
ABSTRACT

OBJECTIVE:

To assess (1) whether Hawley retainers cause speech disturbance and (2) the duration of speech adaptation to Hawley retainers with objective and subjective tests. MATERIALS AND

METHODS:

Twelve adolescents, aged 11.11 to 18.03 years, were included in this study. The assessment of speech sounds were done subjectively using an articulation test and objectively using acoustic analysis before and after Hawley retainer application.

RESULTS:

After wearing Hawley retainers, patients showed statistically significant speech disturbances on consonants [s] and [z]. Regarding the vowels, statistically significant changes were recorded with [i], while F1 increased and F2 and F3 decreased.

CONCLUSIONS:

The tongue changes its target position with the application of a foreign body within the mouth; however, in time it adapts to that new situation.
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Texto completo: Disponible Colección: Bases de datos internacionales Base de datos: MEDLINE Asunto principal: Trastornos de la Articulación / Pruebas de Articulación del Habla / Retenedores Ortodóncicos Aspecto clínico: Diagnóstico Límite: Adolescente / Femenino / Humanos / Masculino Idioma: Inglés Revista: Angle Orthod Año: 2012 Tipo del documento: Artículo País de afiliación: Turquía