The Anatomy Study of the Facial Temporal Region, Age 25-50, in Thai Population Based on Ultrasound Investigation

THE ANATOMY STUDY OF THE FACIAL TEMPORAL REGION, AGE 25-50, IN THAI POPULATION BASED ON ULTRASOUND INVESTIGATION | Chenda Ly, Sirintip Chaichalotornkul, Tawee Saiwichai, Thamthiwat Nararatwanchai, Chantawat Kasemnet SkinMedics Clinic, School of Anti-aging and Regenerative Medicine, Faculty of Public Health, School of Anti-aging and Regenerative Medicine, Dr. Art Aesthetic Clinic Abstract Background – Aging, influenced by genetics and environment, affects facial tissues, including skin, fat, muscles, and bones. The temporal region is significant for both function and appearance. Many Thais are increasingly concerned about temporal depression, which can make them look older, and they seek to improve it through injections. This area is complex due to its layered structure and blood vessel pathways, posing challenges for safe aesthetic procedures. Advanced ultrasound imaging provides detailed views of the anatomy in this region, which is crucial for precise and safe injections. Purpose – This study aims to use high-frequency ultrasound to map the depth and position of the deep temporal arteries and to explore the basic anatomy of the temporal region in Thai individuals aged 25 to 50, with a focus on structural variations. Design/methodology/approach – This observational cross-sectional study included 33 Thai participants (aged 25 to 50) who had received filler injections or not. The study used high-frequency ultrasound ( 2.5 to 16.8 MHz hockey-stick probe) to map the vessels in the temporal region and measure the depth and position of the deep temporal artery and surrounding tissues. Ultrasound images were taken, and participants were surveyed about their satisfaction and any adverse effects. Findings – The study involved 33 subjects (15.15% male, 84.85% female) with an average age of 33.42 years. It compared anatomical features between 10 subjects with hyaluronic acid filler injections (average duration: 32.4 months) and 23 subjects without fillers. Key findings showed variations in skin thickness, subcutaneous layers, SMAS layers, temporal bone, and temporalis muscle thickness at various depths and positions, indicating that filler injections impact the anatomy of the temporal region. The study also identified differences in the depth and position of the temporal artery between the two groups. Research limitations – The small sample size and specific population limit the study's generalizability, and variations in ultrasound equipment and operator expertise may impact the results. Originality/value – The intricate structure of the temporal region in the Thai population necessitates a clear understanding of the spatial arrangement of each tissue layer to enhance the effectiveness and safety of injectable temporal fillers. Ultrasound imaging aids in comprehending these details and supports therapeutic procedures. Keywords: Temporal Region Anatomy, Deep Temporal Arteries, High-Frequency Ultrasound, Thai Population, Facial Aging