buccal corridor: Definition, Uses, and Clinical Overview
The buccal corridor is the visible “dark space” between the corners of the mouth/cheeks and the outer surfaces of the back teeth when a person smiles. It is a common term in smile aesthetics, orthodontics, and prosthodontics (restorative dentistry involving crowns/bridges/dentures). Clinicians use it as a descriptive feature during smile analysis, not as a disease or a dental material. Its appearance can change with tooth position, arch shape, lighting, and how widely someone smiles.