Akademik Veri Yönetim Sistemi
LARYNGOSCOPE, cilt.134, sa.in production, ss.3112-3119, 2024 (SCI-Expanded)
Objective: Knowing the morphological, kinematic, and electrophysiological parameters of the smile in healthy individualsmay contribute to evaluating, planning, and monitoring the smile reanimation. This study aimed to determine the correlationbetween 3D morphometric changes, movement kinematics, and muscle activity in the facial soft tissue of healthy individuals.Method: In this cohort study, 20 volunteers were selected from healthy individuals with no facial disorders. During smil-ing, three-dimensional face scanning, facial motion capture, and surface electromyography (sEMG) were performed. The aver-age displacement, velocity, and acceleration during facial movements were measured. The mean change in 3D surfacemorphometry and activation of the zygomaticus major were determined.Results: The volunteers, comprising 10 males and 10 females, had a mean age of 24 10 years; for female, mean agewas 23 5 years and for men 26 13 years. Significant correlations were found between kinematic and morphometric data(r = 0.51, p < 0.001), sEMG and morphometric (r = 0.50, p < 0.001) data, and sEMG and kinematic data (r = 0.49, p < 0.002).The maximum acceleration occurred during approximately 65% of the muscle activation time and 64% of the peak muscle acti-vation value. Additionally, the maximum velocity was reached at around 73% of the muscle activation time and 67% of thepeak muscle activation value. Furthermore, the maximum displacement values were observed at approximately 88% of themuscle activation time and 76% of the peak muscle activation value.Conclusion: The findings may provide insights into the smile’s functional parameters, contribute to understanding facialmuscle-related disorders, and aid in improving the diagnosis and treatment of the smile.Key Words: 3D facial scan, kinematic, muscle activity, sEMG, smiling.Level of Evidence: NALaryngoscope, 134:3112–3119, 2024