前方部口蓋形態が発音運動に及ぼす影響について　第１報　上顎中切歯部呼気圧との関連

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タイトル別名
  • Influence of Anterior Palatal Form on Speech. Part 1. Relationship to Intraoral Air Pressure.
  • Part 1 Relationship to Intraoral Air Pressure
  • 第1報上顎中切歯部呼気圧との関連

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The purpose of this study was to investigate the influence of anterior palatal form on air pressure during the production of /sa/, /si/, /ta/ and /ci/. The subjects used were 5 male 3 female edentulous patients, whech were native Japanese speakers. Each experimental maxillary denture was fabricated and four experimental thicknesses were defined as a function of alteration in the anterior palatal counter of complete denture. The tip of aluminum tube was placed in artificial incisor teeth and the other tip was connected to a differential micropressure transducer. Air pressure and the speech signal were recorded by a digital data recorder during speech production.<BR>The results were as follows:<BR>1. Air pressure signal in each sound was characterized by the number of peaks and the time relationship to speech signals.<BR>2. The anterior palatal form of complete denture had little influence on the time relationship between the peak of air pressure and speech signals.<BR>3. The peak value of air pressure ranged between 100 and 700 Pa in /sa/, 100 and 500 Pa in /si/, 50 and 600 Pa in /ta/, and 50 and 700 Pa in /ci/. The peak values of air pressure were different among the subjects. Four experimental anterior palatal forms significantly affected peak values of air pressure (ANOVA, p<0.05).<BR>It was concluded that the anterior palatal form of complete denture affected the air pressure flown out from the upper central incisors.

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