(PR051) Will the Maxillary Sinus Mucosal Thickening from Odontogenic Origin Recover after Root Canal Therapy? - A Retrospective Study with Cone-beam CT

Objective: The aim of this study is to conduct a histological comparison of the effectiveness of various irrigation techniques in pulp debridement, evaluating their ability to remove tissue remnants from the root canal system. Odontogenic maxillary sinusitis (OMS) is commonly associated with maxillary sinus mucosal thickening caused by odontogenic infections, often leading to symptoms such as sinus congestion and pain. This retrospective study investigates the recovery of maxillary sinus mucosal thickening due to OMS following either root canal treatment (RCT) or extraction. Utilizing cone-beam computed tomography (CBCT) scans, 71 adult patients aged 14 to 83 years were assessed. The study analyzed associations between treatment type, pre-treatment lesion characteristics, and mucosal thickness changes. Linear regression analysis indicated a significant correlation between treatment type and the percentage reduction in mucosal thickness, with extraction cases showing greater mucosal recovery than RCT. Root canal obturation quality did not significantly influence mucosal thickness changes, although a relationship was noted between percentage change in lesion size and mucosal thickness, with a 0.21% increase in mucosal thickness for every 1% increase in lesion size. Age was also a significant factor, with patients over 60 showing more persistent mucosal thickening. These findings underscore the importance of treatment selection and lesion characteristics in managing OMS-related mucosal thickening. Further research is needed to understand the specific dynamics of mucosal recovery in OMS and to optimize therapeutic approaches for better patient outcomes.