Articulation disorders caused by abnormal dentition

概要

論文の詳細を見る
Twenty-four subjects were classified into two groups. Group I was 18 patients with missing teeth. Six were missing an anterior maxillary tooth, 5 had maxillary complete dentures, 5 were missing mandibular molars and two were edentulous. Group II was 6 patients who had malocclusion. One had an open bite and 5 had mandibular protrusion. Assessment of articulation was based on the 100 Japanese monosyllable articulation test. Sound analysis was performed with a sound spectrograph to reveal any vocal changes caused by dental disorders. The articulation score for Group I was 71.4-96.0% (average 89.0%), while for Group II it was 88.4-97.0% (average 93.0%). Of the 24 subjects, 18 had a score of 80% or greater. Twelve subjects in Group I (66.6%) misarticulated /d/ and /n/, 9 subjects (50.0%) misarticulated /dz/, 8 subjects (44.4%) misarticulated /t/, 6 subjects (33.3%) misarticulated /ts/ and /r/. The alveolar sounds /d/, /n/ and /t/ sounded more like the bilabial sounds /b/, /m/ and /p/. The sibilant sound /d/ sounded like /r/. Four subjects in Group II misarticulated /d/, and 3 misarticulated /s/, /dz/ and /d〓/. The alveolar /d/ and sibilant sound /s/ sounded like /r/ and /∫/ respectively. The sound spectrogram showed the same trend in seven out of eight subjects with loss of teeth and malocclusion. During the articulation of /s/, /ts/, /t∫/ and /n/, formant 2 was increased above the baseline, increasing the difference between formant 1 and 2. The tongue moved forward in a compensatory effort to overcome the dental abnomalities. We concluded that ordinary conversation is unaffected by dental disorders.
大阪歯科学会の論文

Articulation disorders caused by abnormal dentition

スポンサーリンク

概要

著者

関連論文

スポンサーリンク