Fig. 1From: Mandibular cortical bone structure as risk indicator in fractured and non-fractured 80-year-old men and womenReference panoramic radiographs for mandibular cortical index (MCI). a A normal cortex (MCI-1) with an even endosteal margin. b A moderately eroded cortex (MCI-2) with semilunar defects. c A severely eroded cortex (MCI-3) with heavy endosteal cortical porositiesBack to article page