Which classification refers to cavities involving a single surface?

The classification that refers to cavities involving a single surface is known as Black's Classification Class I. This classification is used to categorize dental caries based on their location in the tooth and the number of surfaces affected. Class I cavities are typically found on the occlusal surfaces of the posterior teeth, as well as the buccal or lingual surfaces of anterior teeth.

The focus on a single surface is crucial because it helps dental professionals accurately identify the extent of the decay and determine the appropriate restorative treatment. Understanding this classification assists dental nurses and practitioners in diagnosing and planning care effectively.

Meanwhile, other classifications like Class II refer to cavities on adjacent surfaces of posterior teeth (involving two surfaces), while Class III and Class IV deal with cavities on anterior teeth affecting more than one surface or including the incisal edge, respectively. These details highlight how each class targets different complexities of caries, but for single surface cavities specifically, Class I is the most applicable.