Electromyographic analysis of coordination movements of the orbicularis oris muscle before and after cheiloplasty in infants with cleft lip and palate.

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K17125
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 57060:Surgical dentistry-related
• Research Institution: Fujita Health University
• Principal Investigator: Sano Yoshimi 藤田医科大学, 医学部, 助教 (60791043)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 口唇口蓋裂児 / 口唇形成術 / 表面筋電図 / 積分値移動曲線 / 口輪筋協調運動

Outline of Final Research Achievements

and the affected side were measured during feeding exercises while wearing a feeding bed just before cheiloplasty, 1 month later, and 6 months later, and the integrated value transfer curves and ratios (%) were used to compare the muscle activity. The integral value transfer curves were superimposed on the curves of the healthy side and the affected side to evaluate the presence and degree of impaired coordination before and after cheiloplasty. The results showed that the affected side had less muscle activity than the healthy side and that the coordinated movements were disrupted, but after surgery, the muscle activity of the affected side caught up to the healthy side over time, and the coordinated movements were also seen. Muscle activity on the affected side was below 50% of the healthy side in all cases pre-operation, but by 6 months later, it had caught up to about 75% of the healthy side.

Free Research Field

小児歯科学

Academic Significance and Societal Importance of the Research Achievements

積分値移動曲線を用いることで、哺乳運動中の口輪筋の筋活動量やピークがわかるだけでなく、健側と患側の協調運動の様子についても観察できる。そのため、今までできなかった健側と患側における口輪筋活動の不調和の有無と程度の評価、口唇形成術により筋索形成がなされたことで不調和が改善され、協調運動が行えるようになったことを評価することが可能となる。加えて、医学的知識のない者にも治療前後の変化をよりわかりやすく提示できることから、育児支援の観点からも有用なものとなりえる研究である。