Article: Mirror imaging of impacted and supernumerary teeth in dizygotic twins: A case report

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.

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PMID: 33218010 PMC: 7712131. DOI: 10.3390/dj8040129.

References

1.

Gurgel C, Cota A, Kobayashi T, Silva S, Machado M, Rios D . Bilateral Mesiodens in Monozygotic Twins: 3D Diagnostic and Management. Case Rep Dent. 2013; 2013:193614. PMC: 3596925. DOI: 10.1155/2013/193614. View

2.

Babacan H, Ozturk F, Polat H . Identical unerupted maxillary incisors in monozygotic twins. Am J Orthod Dentofacial Orthop. 2010; 138(4):498-509. DOI: 10.1016/j.ajodo.2008.08.043. View

3.

Townsend G, Richards L, Hughes T, Pinkerton S, Schwerdt W . Epigenetic influences may explain dental differences in monozygotic twin pairs. Aust Dent J. 2005; 50(2):95-100. DOI: 10.1111/j.1834-7819.2005.tb00347.x. View

4.

Nik-Hussein N . Supernumerary teeth in the premaxillary region: its effects on the eruption and occlusion of the permanent incisors. Aust Orthod J. 1990; 11(4):247-50. View

5.

Brand A, Akhavan M, Tong H, Kook Y, Zernik J . Orthodontic, genetic, and periodontal considerations in the treatment of impacted maxillary central incisors: A study of twins. Am J Orthod Dentofacial Orthop. 2000; 117(1):68-74. DOI: 10.1016/s0889-5406(00)70250-2. View

6.

Karmanska B . Similar locations of impacted and supernumerary teeth in monozygotic twins: a report of 2 cases. Am J Orthod Dentofacial Orthop. 2001; 119(1):67-70. DOI: 10.1067/mod.2001.111225. View

7.

Hattab F, Yassin O, Rawashdeh M . Supernumerary teeth: report of three cases and review of the literature. ASDC J Dent Child. 1994; 61(5-6):382-93. View

8.

Gallas M, Garcia A . Retention of permanent incisors by mesiodens: a family affair. Br Dent J. 2000; 188(2):63-4. DOI: 10.1038/sj.bdj.4800390. View

9.

Cassetta M, Altieri F, Giansanti M, Di-Giorgio R, Calasso S . Morphological and topographical characteristics of posterior supernumerary molar teeth: an epidemiological study on 25,186 subjects. Med Oral Patol Oral Cir Bucal. 2014; 19(6):e545-9. PMC: 4259368. DOI: 10.4317/medoral.19775. View

10.

Seddon R, Johnstone S, Smith P . Mesiodentes in twins: a case report and a review of the literature. Int J Paediatr Dent. 1998; 7(3):177-84. DOI: 10.1046/j.1365-263x.1997.00237.x. View

11.

Perillo L, Isola G, Esercizio D, Iovane M, Triolo G, Matarese G . Differences in craniofacial characteristics in Southern Italian children from Naples: a retrospective study by cephalometric analysis. Eur J Paediatr Dent. 2013; 14(3):195-8. View

12.

Mukhopadhyay S . Mesiodens: a clinical and radiographic study in children. J Indian Soc Pedod Prev Dent. 2011; 29(1):34-8. DOI: 10.4103/0970-4388.79928. View

Mirror Imaging of Impacted and Supernumerary Teeth in Dizygotic Twins: A Case Report