Comparison of Speech Patterns According to The Degree of Surgical Setback in Mandibular Prognathic Patients
Journal of the Korean Association of Maxillofacial Plastic and Reconstructive Surgeons
;
: 48-58, 2001.
Artigo
em Coreano
| WPRIM
| ID: wpr-784305
ABSTRACT
surgery, we found some changes in patterns and organs of speech. This investigation was undertaken to investigate the aspect and degree of speech patterns according to the amount of surgical setback in mandibular prognathic patients. Thirteen patients with skeletal Class III malocclusion were studied preoperative and postoperative over 6 months. They had undergone the mandible setback operation via bilateral sagittal split ramus osteotomy (BSSRO). We split the patients into two groups. Group 1 included patients whose degree of mandibular setback was 6mm or less, and Group 2 above 6mm. Control group was two adults with normal speech patterns. A phonetician performed narrow phonetic transcriptions of tape-recorded words and sentences produced by each of the patients and the acoustic characteristics of the plosives, fricatives, and flaps were analyzed with a phonetic computer program (Computerized Speech Lab(CSL) Model 4300B(USA)).The results are as follows 1. Generally, Patients showed longer closure duration of plosives, shorter VOT (voice onset time) and higher ratio of closure duration against VOT. 2. Patients showed more frequent diffuse distribution than the control group in frication noise energy of fricatives. 3. In fricatives, frequency of compact form were higher in group 1 than in group 2. 4. Generally, a short duration of closure for was not realized in the patient's flaps. Instead, it was realized as fricatives, sonorant with a vowel-like formant structure, or trill type consonant. 5. Abnormality of the patient's articulation was reduced, but adaptation of their articulation after surgery was not perfect and the degree of adaptation was different according to the degree of surgical setback.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Acústica
/
Osteotomia Sagital do Ramo Mandibular
/
Má Oclusão
/
Mandíbula
/
Ruído
Tipo de estudo:
Estudo prognóstico
Limite:
Adulto
/
Humanos
Idioma:
Coreano
Revista:
Journal of the Korean Association of Maxillofacial Plastic and Reconstructive Surgeons
Ano de publicação:
2001
Tipo de documento:
Artigo
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