Talon cusp is an unusual abnormality characterized by a cusp-like projection that occurs due to the evagination of enamel and dentin with a variable amount of pulp tissue before calcification, usually present on the cingulum area on the palatal and lingual surface of the anterior teeth. The maxillary lateral incisors are most often affected, followed by the maxillary central incisors in both primary and permanent dentition. The etiology is unknown. This developmental anomaly is rare on the facial surfaces of mandibular canines and very few cases have been reported. When it occurs on the facial surface, it usually affects the esthetics and functioning. The present case report describes an unusual case of a facial talon cusp on a permanent mandibular left canine in a 12-year-old girl. To date, only 1 such case has been reported to our knowledge and it requires careful dental and radiographic examination of the affected patient since the findings can be of clinical significance.
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