What is a common origin for Class V lesions?

Class V lesions, also known as cervical lesions, typically occur at the gingival or cervical third of the tooth. A common origin for these types of lesions is poor oral hygiene. When oral hygiene is inadequate, plaque accumulation around the gum line can lead to gingival recession or enamel demineralization. This creates a conducive environment for caries formation in the area, which can result in Class V lesions.

The other options, while related to dental conditions, do not directly imply a common origin for Class V lesions. Lingual pits, buccal fissures, and deep pits in molars are more associated with carious lesions in specific locations or structures, rather than stemming from overarching issues of oral health habits or hygiene practices. Thus, the link between poor oral hygiene and the development of Class V lesions is the primary reason for this answer being accurate.