This study aimed to compare the mandible inferior cortical bone thickness before and after orthognathic surgery on panoramic radiographs. Among 1092 orthognathic surgery patients, 37(12male, 25 female, average age 23.8 yrs± 4.4) were selected who underwent mandible inferior cortex contouring. The total mandible sides which underwent inferior cortex contouring were 62. The mandible inferior cortical bone thickness was measured below the mesial root of the first molar tooth. The mandible inferior cortical bone thickness was 3.49mm± 0.6mm before orthognathis surgery and 1.92 mm± 0.88 mm after surgery, with statistically significant difference between the two(p<.05). The mean contouring amount was 1.57 mm± 0.8 mm. Mandible inferior cortex contouring are often included in orthognathic surgery.

• 윤숙자(전남대학교 치의학연구소, 치의학전문대학원 구강악안면방사선학교실) | Suk-Ja Yoon Correspondence
• 이은주(전남대학교 치의학연구소, 치의학전문대학원 구강해부학교실) | Eun Joo Lee
• 김성진(전남대학교 치의학전문대학원) | Sungjin Kim
• 강병철(전남대학교 치의학연구소, 치의학전문대학원 구강악안면방사선학교실) | Byung-Cheol Kang
• 이재서(전남대학교 치의학연구소, 치의학전문대학원 구강악안면방사선학교실) | Jae-Seo Lee