<unk>  is a rare dental anomaly resulting in an extra<unk>  or<unk> -like projection on an anterior tooth, located on the inside surface of the affected tooth. Sometimes it can also be found on the facial surface of the anterior tooth. The term<unk> ' refers to the same condition as dens evaginatus; however,<unk>  is more specifically the manifestation of dens evaginatus on the anterior teeth.<unk>  can be simply defined as hyperplasia of the cingulum of an anterior tooth. Although<unk>  may not appear serious, and in some people may be completely benign, it can cause clinical, diagnostic and functional problems, and alters the appearance of a person's teeth. The condition was first described by W.H. Mitchell in 1982 and named by J. Kimball Mellor B.S., D.D.S. and Louis W. Ripa, D.D.S., M.S. due to its similar appearance to an eagle's<unk> . Some sources define a<unk>  as an extra<unk>  which extends at least half the distance between the cementoenamel junction and the incisal edge of the tooth. Other sources classify all enlarged cingula as<unk> s, and classify them according to the degree of enlargement. The incidence of<unk>  has been found to range from 1% to 6% of the population.<unk>  tends to occur on permanent teeth only, being very rare in deciduous teeth. In most cases, the involved teeth are the permanent maxillary lateral incisors (55%), followed by maxillary central incisors (33%), mandibular incisors (6%), and maxillary canines (4%).
Talon cusp
Cradle cap
Harrison's groove
Cobb angle
Axon hillock
Cementicle
Apex 
Tycoon's cap