title: Impacted primary tooth and tooth agenesis: a case report of monozygotic twins.
abstract: In the present report, a case of 19 year-old monozygotic twin brothers with similar tooth agenesis and impacted primary teeth is presented. Both twins (HDH, DHH) had agenesis of ten and eleven teeth (respectively), third molars excluded, consistent with oligodontia and both had four impacted primary teeth and the permanent successors of all these primary teeth were congenitally missing. The occurrence of similarly located tooth agenesis and primary impacted teeth in monozygotic twins may suggest the influence of genetic factors in their etiology. In addition, primary tooth impaction may be related to congenitally missing tooth.
authors.affiliation: Department of Oral Diagnosis and Radiology, Faculty of Dentistry, University of Ondokuz Mayis, Samsun, Turkey.
authors.forename: A Zeynep
authors.initials: AZ
authors.lastname: Zengin
authors.forename: A Pinar
authors.initials: AP
authors.lastname: Sumer
authors.forename: Emine
authors.initials: E
authors.lastname: Karaarslan