226 Cases' Cbct Analysis Of Mandibular Second-Third Molar Area

The aim was to explore the imaging characterization of mandibular third and second molar and their associated areas using cone beam computed tomography. A total of 226 images of patients with concomitant mandibular second and third molars in the Department of Oral and Maxillofacial Medical Imaging of Nanjing Stomatology Hospital were selected to retrospectively analyze their clinical information and imaging manifestations from January 2020 to January 2024, and their clinical information and imaging performances were analyzed. According to the imaging aspects, the mandibular M2 and M3 associated regions with abnormal CBCT imaging manifestations were mainly categorized into six phenotypes (types I-VI); among them, middle-aged and elderly patients ≥45 years of age more often showed abnormal imaging phenotypes, and the peripheral bone defects were more severe. The correlation between the type and height of the mandibular M3 obstruction and the imaging typology of the mandibular M2 and M3 association regions was statistically significant; the circumferential angle of the peripheral bone defects in the mandibular M2 and M3 regions showed strong correlation with age, typology (P<0.0001), and the height of the obstruction. The correlation between defect depth and obstruction height for the same fractal type was statistically significant in the age groups ≤25 years and 26-44 years . In this study, we explored the imaging characteristics of the mandibular M2 and M3 association region using CBCT, revealing the imaging characterization of the complex physiopathological relationship between M3 and M2.