What is the median point in the lower margin of the lower membranous lip called?

The median point in the lower margin of the lower membranous lip is referred to as the labrale inferius. This term specifically denotes the anatomical landmark located at the midpoint of the lower lip, serving as a key reference point in cephalometric analysis and orthodontic assessments. The labrale inferius is significant because it helps in evaluating dental relationships and facial proportions, providing insights into the soft tissue profile of a patient.

Understanding the labrale inferius is essential in orthodontics and cosmetic dentistry, as it can influence treatment planning and aesthetic outcomes. In contrast, the other terms provided refer to different anatomical structures or landmarks; for instance, inferior labial sulcus is the groove formed between the lip and the gums, pronasale relates to the tip of the nose, and super labial sulcus pertains to the groove above the upper lip. Each of these terms has its distinct significance, but none describes the specific median point on the lower lip.