Okamoto Keiko, Tanikawa Chihiro, Takada Kenji
Global Center for Medical Engineering and Informatics, Osaka University, Osaka, Japan.
Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Osaka University, Osaka, Japan.
Int J Dent. 2022 Aug 27;2022:5340301. doi: 10.1155/2022/5340301. eCollection 2022.
The vascularity index (VI) is useful for measuring the hemodynamics on ultrasound imaging. However, there are no reports concerning the application of the VI to facial muscles.
The aim of this study was (1) to establish a method of measuring the hemodynamics in facial muscles in a constant way and (2) to evaluate the hemodynamic changes in the masseter and superior orbicularis oris muscles (SOOMs) before and after exercise load in two subject groups of females of different ages.
(1) The VI in the SOOM was calculated, and the test-retest reliability was assessed in seven healthy adults. (2) The VIs in the left-side masseter and SOOM were calculated in 3 sessions: before exercise loading (0), immediately after loading (1), and 5 minutes after 1 (2) for the young adult group (YAG, = 20; age range, 20-35 years) and the middle-aged to old group (MOG, = 20; age range, 50-70 years). Tasks were gum chewing for the masseter muscle and lip sealing for the SOOM. The differences in the mean peak flows between two sessions were examined.
(1) Significant differences were not noted for the repeatedly measured average volumes of blood flow with good test-retest agreement (intraclass correlation coefficient = 0.81). (2) In both muscles of the YAG, there were a significant increase in 1 compared with 0 and a significant decrease in 2 compared with 1 (all < 0.05). In both muscles of the MOG, no significant differences were noted in either comparison.
A method of measuring the hemodynamics in facial muscles was developed and showed good reliability. Changes in the blood flow after exercise load in these muscles may vary with age in women.
血管化指数（VI）有助于在超声成像中测量血流动力学。然而，尚无关于将VI应用于面部肌肉的报道。
本研究的目的是（1）建立一种以恒定方式测量面部肌肉血流动力学的方法，以及（2）评估不同年龄女性的两个受试者组在运动负荷前后咬肌和口轮匝肌上部（SOOMs）的血流动力学变化。
（1）计算SOOM中的VI，并在7名健康成年人中评估重测信度。（2）在3个时段计算年轻成年组（YAG，n = 20；年龄范围，20 - 35岁）和中老年组（MOG，n = 20；年龄范围，50 - 70岁）左侧咬肌和SOOM中的VI：运动负荷前（0）、负荷后立即（1）以及1后5分钟（2）。任务分别是咬肌的咀嚼口香糖和SOOM的唇部紧闭。检查两个时段之间平均峰值血流的差异。
（1）重复测量的平均血流量无显著差异，重测一致性良好（组内相关系数 = 0.81）。（2）在YAG的两块肌肉中，与0相比，1时有显著增加，与1相比，2时有显著减少（均P < 0.05）。在MOG的两块肌肉中，两种比较均未发现显著差异。
开发了一种测量面部肌肉血流动力学的方法，且显示出良好的可靠性。这些肌肉在运动负荷后的血流变化可能因女性年龄而异。
