How many teeth are present in a quadrant of an adult mouth?

In an adult mouth, each quadrant typically contains eight teeth. Each quadrant comprises two incisors, one canine, two premolars, and three molars, which includes the first, second, and third molars. Therefore, when considering the full complement of teeth in a quadrant, the correct answer is eight.

This configuration is standard in permanent dentition, where an adult has a total of 32 teeth divided into four quadrants. Understanding this basic dental anatomy is crucial for dental professionals, as it forms the foundation for various clinical assessments, treatment plans, and patient education regarding oral health and dental care.