International Research Journal of Education and Technology

The human oral commissure, or the corner of the mouth where the upper and lower lips meet, is a vital anatomical feature that plays a significant role in facial expression and speech articulation. Understanding the intricate vascular supply to this region is crucial for various medical and surgical procedures, including facial reconstruction, cosmetic surgery, and trauma management. In particular, the relationship between the inferior and superior labial arteries in supplying blood to the oral commissure is of paramount importance.