What clinical finding corresponds to hyperplastic pulp in a primary molar?

The clinical finding that corresponds to hyperplastic pulp in a primary molar is characterized by the pulp tissue becoming enlarged and capable of extruding out of the crown of the tooth. Hyperplastic pulp, also known as pulp hyperplasia, typically occurs as a response to chronic irritation, such as from dental caries or trauma. This condition is manifested by an abundant, often exuberant growth of the pulp tissue, which can be visible during clinical examination as it pushes through the cavity of the tooth.

This enlarged pulp can appear disorganized, red, or inflamed, and it may protrude through the entrance of a carious defect. This situation underscores the regenerative potential of the dental pulp in response to ongoing irritation or damage.

In contrast, other options such as pulp necrosis indicate death of the pulp with no vitality, while pulp calcification refers to the deposition of calcified tissue within the pulp chamber, not a growth or expansion of the pulp. A periodontal abscess represents an infection in the periodontal tissues, typically resulting from a different pathological process. Therefore, the characteristic manifestation of hyperplastic pulp aligns closely with the visible enlargement that extrudes from the crown of the tooth.