e70 Med Oral Patol Oral Cir Bucal. 2010 Jan 1;15 (1):e70-3. Etiology of odontogenic maxillary sinusitis Journal section: Oral Surgery doi:10.4317/medoral.15.e70 Publication Types: Review Meta-analisis of the etiology of odontogenic maxillary sinusitis Oscar Arias-Irimia 1 , Cristina Barona-Dorado 2 , Juan A. Santos-Marino 1 , Natalia Martínez-Rodríguez 3 , José Mª Martínez-González 4 1 Oral Surgeon of the Oral and Implantological Surgery Department of the Hospital de Madrid 2 Associate Professor of Surgery of Madrid Complutense University. Subdirector of the Master of Oral Surgery and Implantology of the Hospital de Madrid 3 Assistant of the Oral and Implantological Surgery Department of the Madrid Hospital 4 Assistant Professor of Surgery of Madrid Complutense University. Chairman of the Oral and Implantological Surgery De- partment of the Hospital de Madrid Correspondence: C/ Jumilla, 27 Las Rozas 28230 (Madrid) dentoscar@hotmail.com Received: 15/02/2009 Accepted: 30/07/2009 Arias-Irimia O, Barona-Dorado C, Santos-Marino JA, Martínez-Rodri- guez N, Martínez-González JM. Meta-analsis of the etiology of odonto- genic maxillary sinusitis. Med Oral Patol Oral Cir Bucal. 2010 Jan 1;15 (1):e70-3. http://www.medicinaoral.com/medoralfree01/v15i1/medoralv15i1p70.pdf Abstract Objective: To identify and evaluate the frequency of the different odontogenic conditions that may lead to maxi- llary sinusitis. Study design: An observational and retrospective meta-analysis was carried out on 770 cases of maxillary sinusitis obtained from a literature review of 15 articles. Results: Maxillary sinusitis most commonly manifests itself as chronic maxillary sinusitis. It is more common in females and is most often diagnosed in the ffth decade of life. The teeth most predominantly affected are the molars, with the frst molar tooth being the most frequently involved. The principal etiological factor is extraction. Key words: Maxillary sinusitis, iatrogenia, maxillary sinus, periodontitis. Article Number: 2705 http://www.medicinaoral.com/ © Medicina Oral S. L. C.I.F. B 96689336 - pISSN 1698-4447 - eISSN: 1698-6946 eMail: medicina@medicinaoral.com Indexed in: -SCI EXPANDED -JOURNAL CITATION REPORTS -Index Medicus / MEDLINE / PubMed -EMBASE, Excerpta Medica -SCOPUS -Indice Médico Español Introduction The infammation of the sinus membrane that covers the paranasal sinus is refered as “maxillary sinusitis”. Among the four pair of paranasal sinus, the maxillary sinus are the biggest ones and those most frequently da- maged. Possible etiologies comprise local and systemic conditions which can be subdivided into acute, subacute and chronic forms according to their evolution. Whe- reas the frst two are usually produced by infections or allergic rhinogenous sources, the chronic form is usua- lly associated with an odontogenic origin. Normally the roots of the maxillary premolar and molar teeth are separated from the sinus foor by a dense cor - tical bone with a variable thickness, but sometimes they are separated only by the mucoperiosteum. Clearly, this anatomical layout can explain the source and develop- ment of an infammatory process, and it is this close relationship the responsible for the 37- 40,6% (1) odon- togenic origin of the maxillary sinusitis for many au- thors. The high incidence of this pathology reveals the need to recognize it as an important disease we have to be able to deal with in order to prevent it or even treat it whenever necessary.