title: Permanent double teeth and hypodontia in a pair of monozygotic twins: case report.
abstract: Double and congenitally missing teeth are known to be commoner in the primary dentition than the permanent. The knowledge of this trait in the permanent dentition in Africa is still poor. This paper describes the clinical findings in a pair of monozygotic Nigerian twins. This illustrates the claims of genetic basis of such conditions, which have been reported severally in developed parts of the globe but not much among the indigenous Nigerian Negroid population especially involving the permanent dentition.
authors.affiliation: Orthodontic Unit, Department of Preventive Dentistry, College of Medicine/ University College Hospital, University of Ibadan, Nigeria.
authors.forename: C O
authors.initials: CO
authors.lastname: Onyeaso
mesh_terms: D000848:Anodontia / Q000235:genetics*; D002648:Child; D019229:Dentition, Permanent; D005260:Female; D005671:Fused Teeth / Q000235:genetics*; D006801:Humans; D007180:Incisor / Q000002:abnormalities*; D009549:Nigeria; D014430:Twins, Monozygotic