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talon cusp
A talon cusp (also termed eagle's talon) is an extra cusp on an anterior (front) tooth. Talon cusp is a specific type of dens evaginatus on anterior teeth. The incidence has been found to range from less than 1% to 6% of the population.〔Neville, B.W., D. Damm, C. Allen, J. Bouquot. ''Oral & Maxillofacial Pathology''. Second edition. 2002. Page 78. ISBN 0-7216-9003-3.〕 Of all cases, 55% occur on the permanent maxillary lateral incisor, and 33% occur on the permanent maxillary central incisor. They are found rarely in primary teeth.
The condition is usually benign, but it can cause mild irritation to soft tissues around the teeth and the tongue, and if large enough, may pose an aesthetic problem. Talon cusps that are too large are filed down with a motorised file, and then endodontic therapy is administered.
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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