Fig. 1

The radiographic bone density expressed as grayscale values (GSV) were measured by using the easy digitalized panoramic analysis method. Rectangle annotation analysis of INFINITT PACS® (INFINITT Healthcare, Seoul, Korea) was used for measuring the radiographic bone density GSV in suppurative OM as shown in patient No.7. A standard rectangular lesion area of approximately 50 mm² was defined as the region of interest, designated at the center of the OM lesion. The bone density of the contralateral bone in the healthy region was also measured as a reference value to determine the absolute value (a). Intraoperative view of decompressive drain insertion intraorally following surgical management in suppurative type OM with drain (b). Intraoperative view of surgical debridement in sclerosing OM without drain (c)