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Case of hidden tooth: mesiodens fortuitously discovered on a cone-beam CT examination
  1. Alexandre Perez1,
  2. Ourania Stergiopulos2,
  3. Vincent Lenoir3 and
  4. Tommaso Lombardi1
  1. 1Unit of Oral Surgery and Implantology, Divison of Maxillo-facial Surgery, Geneva University Hospitals, Geneva, Switzerland
  2. 2Division of Orthodontics, University Clinics of Dental Medicine, University of geneva dental School, Geneva, Switzerland
  3. 3Division of Radiology, Diagnostic Department, Geneva University Hospital, Faculty of Medicine, Geneva, Switzerland
  1. Correspondence to Dr Alexandre Perez; alexandre.perez{at}


Mesiodens is the most common type of supernumerary tooth, located between the maxillary central incisors. A young man was referred by his orthodontist for management of a supernumerary tooth located in quadrant I, superposed to the bottom of the right maxillary sinus, distally orientated with the crown in contact with the apex of the palatal root of the maxillary first molar. The tooth was found on a panoramic radiography before starting his orthodontic treatment. To remove it and in order to study, its relationship to the anatomical structures a cone-beam CT examination was performed. This revealed the presence of a mesiodens located on the right paramedian maxillary area. Pericoronal tissue submitted for histopathological examination showed an uninflamed dental follicle. Healing was uneventful. This case shows that mesiodens outside the arch, located in the posterior palate, may be not discovered in a panoramic radiograph.

  • Dentistry and oral medicine
  • Radiology (diagnostics)
  • Ear, nose and throat
  • Mouth

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  • Contributors Conception and design done by AP and TL. Acquisition of data or analysis and interpretation of data by AP, OS, VL and TL. Drafting the article is done by AP and TL.Final approval of the version is done by AP, OS, VL and TL.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Case reports provide a valuable learning resource for the scientific community and can indicate areas of interest for future research. They should not be used in isolation to guide treatment choices or public health policy.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.