Imaging Science in Dentistry
- Volume 36 Issue 4
- /
- Pages.183-188
- /
- 2006
- /
- 2233-7822(pISSN)
- /
- 2233-7830(eISSN)
Bone changes after bilateral sagittal split osteotomy for mandibular prognathism
하악 전돌증 환자의 양측성 하악지 시상분할 골절단술 후 골 변화
- Park, Hyun-Jung (Department of Oral and Maxillofacial Radiology, College of Dentistry, Pusan National University) ;
-
Jung, Yun-Hoa
(Department of Oral and Maxillofacial Radiology, College of Dentistry, Pusan National University) ;
-
Cho, Bong-Hae
(Department of Oral and Maxillofacial Radiology, College of Dentistry, Pusan National University)
- Published : 2006.12.31
Abstract
Purpose: The purpose of this research was to study bone changes after bilateral sagittal split osteotomy through fractal analysis and measurement of mandibular cortical thickness. Materials and Methods: This study included twenty-two prognathic patients who underwent bilateral sagittal split osteotomy. Panoramic radiographs of these patients were taken immediately before operation and at 1 month, 6 months, and 12 months postoperatively. The fractal dimension was measured by the box-counting method in the region of interest centered on both the basal and interdental bones between the first and second mandibular molars. Measurements of mandibular cortical thickness were taken both in the area between the first and second mandibular molars and at the osteotomy site. Changes of fractal dimension and cortical thickness over four stages were statistically analyzed. Results: The fractal dimension of the mandibular basal bone before surgery and after 1 month, 6 months and 12 months were