What characterizes Class V caries in Black's classification?

Class V caries, as characterized in Black's classification, specifically refer to carious lesions that develop on the gingival third of the facial or lingual surfaces of any tooth. This classification emphasizes that the location of the decay is primarily related to the area where the gum meets the tooth, which is often susceptible due to factors such as plaque accumulation, gingival recession, or improper oral hygiene practices.

In contrast to other classifications, Class V does not involve the incisal edges, cusps, or proximal surfaces of teeth, which is why the other options do not align with this classification. The nature of Class V caries often relates to non-cavitated lesions that can progress due to exposure and the environment in which they form. Understanding these characteristics is crucial for dental professionals in diagnosing and planning appropriate treatment strategies for carious lesions effectively.