Which abnormal feature may occur due to delayed or ectopic eruption?

Delayed or ectopic eruption can contribute to the development of shovel-shaped incisors. Shovel-shaped incisors are characterized by a specific morphology where the incisal edges are not flat but instead have a pronounced concavity or scoop-like shape on the lingual surface. This dental trait can be influenced by genetic factors as well as environmental conditions during the eruption of teeth. When the timing or position of eruption is altered, it may lead to changes in the shape and structure of the teeth, manifesting as shovel-shaped incisors.

In contrast, the other options, while related to dental anomalies, do not specifically arise from issues related to the timing or position of tooth eruption. Hyperdontia refers to the presence of extra teeth and does not directly correlate with delayed or ectopic eruption. Cleft lip is a congenital anomaly that occurs due to the improper fusion of facial structures during development and is not associated with tooth eruption timing. Mandibular incisor crowding, although related to the positioning of teeth, is less directly linked to delayed or ectopic eruption than the specific morphological changes seen in shovel-shaped incisors.