The Retrospective Study Of Odontogenic Maxillary Sinusitis Using CBCT

Objective: To describe the imaging feature of maxillary sinusitis using CBCT scanning and to determine whether to have teeth more frequently associated with the disease.Methods : 500 CBCT scaning were classified as1. normal sinus,maxillary sinusitis of a non-odontogenic origin,maxillary sinusitis of an odontogenic origin and maxillary sinusitis of an undermined origin2.four grades of apical periodontitis and five classed of the maxillary sinus mucosal thickening.Results: Sinusitis of odontogenic origin is recognized if it met with the following criteria: tooth with defective restoration, carious tooth,or extraction site with radiographically periapical lesion and mucosal thickening limited to area of the tooth or extraction site in question. Maxillary sinusitis with odontogenic origin was defected and accounted for nearly 48.6% of all the maxillary sinusitis. First molar of maxillary was found to be likely associated with odontogenic sinusitis.In sinuses which thickening was a little more than 2mm, the mean number of mucosal thickening was 6.11±4.43 mm. The mean maxillary sinus mucosal thickening was 3.03±4.84 mm. By chi-square test, there is linear relation between maxillary sinus mucosal thickening and apical periodontitis of maxillary premolars/molars. The maxillary sinus mucosal thicken prevalence increased with the increasing severity of apical periodontitis.Conclusion: All patients with maxillary sinusitis, nearly half of the cases was associated with odontogenic pathology. The maxillary sinus mucosal thickening prevalence increased with increasing severity of apical periodontitis. First molar of maxillary was the most likely to cause odontogenic maxillary sinusitis. The use of CBCT scaning can provide the accurate structure of the maxillary sinus and the changes of it.