Molecular imaging of energy metabolism of masticatory muscle in the patients with skeletal C lass III jaw deformity in Japanese observed by electromyography, mfMRI and 31P-MRS

Molecular imaging of energy metabolism of masticatory muscle in the patients with skeletal C lass III jaw deformity in Japanese observed by electromyography, mfMRI and 31P-MRS - Molecular imaging of energy metabolism of masticatory muscle in skeletal Class III patients

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000035581

Enrollment

Registered

2019-01-18

Start date

2019-05-17

Completion date

Unknown

Last updated

2026-06-29

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

Conditions

Skeletal Class III jaw deformity patient and healthy volunteer

Interventions

clenching at 30% maximum voluntary contracti on in the patients with skeletal Class III jaw deformity and the healthy volunteers

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: The skeletal Class III jaw deformity patients an d healthy volunteers of twenty years old and ov er participated in this study

Exclusion criteria

Exclusion criteria: 1)general MRI examination contraindication cases (2)symptoms of temporomandibular joint or jaw muscle disorders (3) The subjects judged to be inappropriate by principal investigator

Design outcomes

Primary

Measure	Time frame
T2 relaxation time median power frequency mean power frequency	—

Secondary

Measure	Time frame
Signal intensity of the phosphocreatine (PCr) Signal intensity of the inorganic phosphate (Pi) pH	—

Countries

Japan

Contacts

Public ContactToru Kitahara

Faculty of Dental Science, Kyushu University the Section of Orthodontics, Division of Oral H

kitahara@dent.kyushu-u.ac.jp092-642-6462

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026