What is the correct term used to describe the vertical distance between the upper and lower incisors, which is usually measured during an orthodontic assessment?

The term that accurately describes the vertical distance between the upper and lower incisors during an orthodontic assessment is overbite. This measurement indicates how much the upper incisors overlap the lower incisors when the mouth is closed. A normal overbite occurs when the upper incisors cover the lower incisors to a certain extent, typically around 2 to 4 millimeters.

Understanding overbite is crucial for evaluating occlusion and assessing the need for orthodontic treatment. It helps dental professionals determine if there are alignment issues or discrepancies that might lead to uneven wear of teeth or jaw discomfort. In contrast, anterior open bite refers to a condition where there is no vertical overlap between the upper and lower incisors, while crossbite involves misalignment where some upper teeth sit inside the lower teeth. Overjet measures the horizontal distance between the upper and lower incisors and is distinct from how they overlap vertically.