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Abstract
Background: Mesiodens is the most common type of supernumerary tooth found in the premaxilla. It might be discovered by the clinical examination by chance on a radiograph or as the cause of an unerupted maxillary central incisor. The genetic transmission of supernumerary and impacted teeth is poorly understood. Mirror imaging in twins has been reported frequently in relation to several unilateral dental anomalies including mesiodens. This phenomenon is the appearance of an asymmetrical feature or anomaly occurring on the right side of one twin but on the left side of the other twin. The event of mesiodens mirror imaging in monozygotic twins has been described in literature. Results: This is the first reported case of mesiodens mirror images in dizygotic twins. The de-scribed mesiodens caused the eruption failure of maxillary permanent incisors. The super-numerary teeth were removed to facilitate the spontaneous eruption of the impacted perma-nent maxillary incisors. Clinical Implications: Studies related to supernumerary teeth can be useful to clinicians in the early diagnosis of this anomaly. Clinical and radiographic examinations provide a correct therapeutic approach. Key words:Supernumerary teeth, twins, dental development.
Highlights
A supernumerary tooth is a developmental numerical anomaly consisting in the presence of a tooth in addition to the normal series [1] .The mesiodens is the most frequent of the supernumerary teeth and is located in the maxillary central incisor region [2,3,4]
The diagnosis usually occurs between 7 and 9 years of age. This is probably due to permanent central incisors eruption at this stage: the complaint of non-eruption induces a radiological examination that might reveal the presence of a mesiodens [5]
The aim of this study is to report the occurrence of mesiodens with mirror images in dizygotic twins, which has never been described in literature before
Summary
A supernumerary tooth is a developmental numerical anomaly consisting in the presence of a tooth in addition to the normal series [1] .The mesiodens is the most frequent of the supernumerary teeth and is located in the maxillary central incisor region [2,3,4]. The diagnosis usually occurs between 7 and 9 years of age This is probably due to permanent central incisors eruption at this stage: the complaint of non-eruption induces a radiological examination that might reveal the presence of a mesiodens [5]. This dental anomaly has been reported to cause delay or failure of eruption of the permanent incisors in 28% to 52% of reported cases [6,7]. Mesiodens is the most common type of supernumerary tooth found in the premaxilla It might be discovered during the clinical examination as a casual finding on a radiograph or as the cause of an unerupted maxillary central incisor. Mirror imaging in twins has been reported frequently in relation to several unilateral dental anomalies including mesiodens.
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