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[Dysgnathias and apical S-sound formation].
Zahn-, Mund-, Und Kieferheilkunde Mit Zentralblatt
|January 1, 1990
Summary
Patients with dysgnathias exhibit sigmatism, a speech impediment, more frequently than those with a normal bite. Apical S, a specific tongue position during speech, is also more common in individuals with dysgnathias.
Area of Science:
- Speech Pathology
- Orthodontics
- Linguistics
Background:
- Sigmatism, a speech impediment affecting the 'S' sound, is often associated with dental and jaw irregularities (dysgnathias).
- Understanding the relationship between oral structure and speech sound production is crucial for effective diagnosis and treatment.
- Previous research has explored links between malocclusions and speech sound errors, but specific articulatory patterns require further investigation.
Purpose of the Study:
- To investigate the prevalence of sigmatism in individuals with and without dysgnathias.
- To analyze the tongue position during 'S' sound articulation in individuals without sigmatism.
- To identify specific articulatory patterns, such as apical 'S', associated with different types of dysgnathias.
Main Methods:
- Selection of participants from 800 patients with dysgnathias and 90 probands with eugnathic bites, excluding those with sigmatism.
- Observation and analysis of tongue position during the articulation of the 'S' sound in individuals without sigmatism.
- Statistical comparison of sigmatism and apical 'S' prevalence between groups with and without dysgnathias, and across different dysgnathia types.
Main Results:
- Sigmatism was found to be significantly more frequent in patients with dysgnathias compared to those with a eugnathic bite.
- An apical 'S' articulation was significantly more common in patients with dysgnathias than in individuals without dysgnathias.
- Apical 'S' was significantly more prevalent in cases of 'open bite' compared to 'lack of room' and 'extended overjet' dysgnathias.
Conclusions:
- Dysgnathias are strongly associated with a higher incidence of sigmatism.
- The apical 'S' sound production is a significant indicator linked to dysgnathias.
- Apical 'S' in conjunction with dysgnathias may represent a precursor to pathological speech sound production, highlighting the need for early intervention.