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Anterior open bite and oral port constriction.

T L Klechak, D P Bradley, D W Warren

The Angle Orthodontist

|July 1, 1976

Summary

Individuals with anterior open bite have larger oral port constrictions during speech compared to those with normal occlusion. The severity of the open bite directly correlates with the increased size of the oral port opening.

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Area of Science:

Speech production
Oral physiology
Dental occlusion

Background:

Anterior open bite can affect speech clarity and oral airflow.
Understanding the impact of malocclusion on speech mechanics is crucial for diagnosis and treatment.

Purpose of the Study:

To investigate and quantify the area of oral port constriction during fricative sound production in individuals with anterior open bite compared to those with normal occlusion.
To determine the relationship between the degree of anterior open bite and the resulting oral port area.

Main Methods:

Simultaneous measurement of intraoral air pressure and oral airflow rate during fricative sound production.
Calculation of oral port constriction area based on airflow and pressure data.
Comparison of oral port constriction areas between subjects with anterior open bite and subjects with normal occlusion.

Main Results:

Subjects with anterior open bite exhibited significantly larger oral port constriction areas than control subjects across all tested sounds.
A direct correlation was observed between the severity of the anterior open bite (vertical defect) and the size of the oral port opening.
Severe open bite (vertical defect > 5 mm) was associated with significantly larger oral port openings compared to moderate open bite (3-5 mm).

Conclusions:

The degree of anterior open bite directly influences the area of oral port constriction during speech.
Increased severity of anterior open bite leads to a larger oral port opening, impacting speech sound production.
These findings highlight the biomechanical adaptations in speech production associated with anterior open bite.

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