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Nasal obstruction causes a decrease in lip-closing force.

Kishio Sabashi¹, Kaei Washino, Issei Saitoh

¹Private practice, Kani, Japan.

The Angle Orthodontist

|March 31, 2011

Summary

Nasal obstruction is linked to reduced lip-closing force in females. Increased severity of nasal blockage correlates with weaker lip seal strength.

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Published on: October 13, 2017

Area of Science:

Otorhinolaryngology
Physiology

Background:

Nasal obstruction can impact craniofacial function.
The relationship between nasal airway resistance and lip function requires further investigation.

Purpose of the Study:

To examine the association between nasal obstruction and lip-closing force.
To determine if nasal airway resistance affects lip muscle strength.

Main Methods:

Measured nasal airway resistance and lip-closing force in 54 Japanese females.
Grouped subjects into normal and nasal obstruction categories based on nasal resistance.
Statistically analyzed differences and correlations between nasal obstruction and lip-closing force.

Main Results:

The nasal obstruction group exhibited significantly lower lip-closing force than the normal group.
A significant negative correlation was observed between nasal airway resistance and lip-closing force in the nasal obstruction group.
No correlation was found between nasal airway resistance and lip-closing force in the normal group.

Conclusions:

Nasal obstruction is associated with diminished lip-closing force.
Severe nasal obstruction leads to weakened lip-closing capacity.
Findings suggest a link between nasal patency and orofacial muscle function.