Odontogenic Sinusitis Caused by an Inflammation of a Dentigerous Cyst and Subsequent Finding of a Fibrous Dysplasia. A Case Report

Carmen López-Carriches1, *, Inmaculada López-Carriches2, Rafael Baca-Perez Bryan3
1 School of Dentistry, Universidad Complutense de Madrid, Spain
2 Hospital Nuestra Señora del Prado, Talavera de la Reina, Spain
3 Facultad de Odontología, Universidad Complutense de Madrid, Spain

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© López-Carriches et al.; Licensee Bentham Open

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (, which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the School of Dentistry, Universidad Complutense de Madrid, Rey Francisco, 11-bajo izda, 28008 Madrid, Spain; Tel: 0034915429435; Fax: 0034915422507; E-mail:


We report the case of a 38-year old male patient with sinusitis caused by an infected follicular cyst due to an ectopic impacted third molar in the right maxillary sinus.

A 10-day antibiotherapy regimen was administered; subsequently, the cyst and the third molar were removed achieving complete recovery.

Fibrous dysplasia was diagnosed at follow-up examination (occupation of the maxillary sinus by bone tissue was observed in a radiographic examination) and confirmed by biopsy.

In cases of odontogenic sinusitis, thorough examination is crucial, as evidenced by the case reported in this study.

A Literature review was performed in order to identify the diagnostic methods currently available and the clinical features, complications and treatment for both, odontogenic maxillary sinusitis and fibrous dysplasia.

Keywords: Dentigerous cyst, Fibrous dysplasia, Odontogenic maxillary sinusitis, Third molar.