Final answer:
Perceived quality is the aspect of a dentist's product that relates to customers' ability to determine its benefits.
Step-by-step explanation:
The aspect of the dentist's product that relates to customers' ability to distinguish whether or not it is beneficial is called Perceived quality.
Perceived quality refers to how customers perceive the quality of a product based on their own beliefs, expectations, and past experiences. In the case of dentists, customers may have difficulty determining the actual benefits of the dental services they are offered, leading to uncertainty and reliance on perceived quality.