Internal resorption is an unusual conition of a tooth when the dentin and pulpal walls begin to resorb centrally within the root canal. The first evidence of the lesion may be the appearance of a pink-hued area on the crown of the tooth; this condition is referred to pink tooth of Mummery, after the 19th century anatomist James Howard Mummery, and represents the hyperplastic, vascular pulp tissue filling-in the resorbed areas.