Article: Volume 13 Number 1 Page 10 - January 2020

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  Orth Update 2020; 13: 10-14

Orthodontics:  An Unusual Case of SMMCI Syndrome: Supernumerary Midline Central Incisor in Siblings

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Abstract: This is the first reported case of siblings with Solitary Median Maxillary Central Incisor (SMMCI) syndrome presenting with an erupted single symmetrical central maxillary midline incisor between normal central incisors. Usually only one central incisor is present. This case is also interesting as the tooth described could have been mistaken for a mesiodens, however, a mesiodens is not symmetrical and usually erupts between the maxillary central incisors and sits slightly to the right or left of the midline.

Clinical relevance: This case highlights the fact that SMMCI should not be considered as a simple dental anomaly because it may be associated with more complex craniofacial malformations.

Author notes: Hannah Morison, MFDS, RCPSG, BDS, DCT2 in Orthodontics and Paediatrics in Glasgow, Toby Gillgrass, FDS(Orth), RCSEdin, MSc, FDS RCSEdin, BDSEdin, Honorary Clinical Senior Lecturer (Glasgow Dental School), Evelyn Dunbar, MFDS, RCPSG, BDS, Consultant Orthodontist StR in Orthodontics in Dundee and Richard Welbury, FFGDP(UK), FRCPCH(UK), FDS RCPSGlasg, FDS RCSEng, PhD, MBBS, BDS(Hons), Professor/Honorary Consultant in Paediatric Dentistry, Research Lead, UCLAN, Preston, Lancs PR1 2HE, UK.

Objective: To recognize SMMCI syndrome where the midline symmetrical central incisor is an additional tooth to a normal complement of teeth.