Assessment of the Marginal Morphology of the Orbicularis Oris Muscle Using Ultrasonography and Investigation of Lip Closure Force

Evaluation of the Marginal Morphology of the Orbicularis Oris Muscle Using Ultrasonography and Its Relationship to Lip Closure Force - US of the Orbicularis Oris Morphology and Lip Closure Force Study

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000060671

Enrollment

Registered

2026-02-13

Start date

2023-01-29

Completion date

Unknown

Last updated

2026-09-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy older adults

Interventions

None listed

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Individuals who provide written informed consent (for nursing home residents, consent obtained from the participant or a legally authorized representative) Young adult group: males and females aged 20 to 40 years (university staff or students) Older adult group: males and females aged 65 years or older (residents of a special nursing home for the elderly) Able to comply with the examination procedures and undergo measurements in a seated position

Exclusion criteria

Exclusion criteria: History or presence of malignancy, trauma, neurological disease, or dermatologic disorders in the maxillofacial/oral region History of lip surgery or cosmetic treatment of the lips Previous experience with lip closure training

Design outcomes

Primary

Measure	Time frame
Lip closure force (maximum lip closure force measured in Newtons using a lip closure force measuring device; the highest value of three measurements will be used; assessed at the time of examination)	—

Secondary

Measure	Time frame
Marginal morphology classification and thickness of the orbicularis oris muscle assessed by ultrasonography	—

Countries

Japan

Contacts

Public ContactMai Okubo

Tokyo Dental College, Department of Oral Health and Clinical Science, Division of Dysphagia Rehabilitation,

mokubo@tdc.ac.jp03-6380-9221

Outcome results