Cone beam형 전산화단층영상과 치근단방사선영상의 치근단 병소에 대한 정량적인 분석
Quantitative analysis of periapical lesions on cone beam computed tomograph and periapical radiograph
김진화, 이완, 김경수, 노영채, 김대석, 이병도,
소속 상세정보
김진화 ( Kim Jin-Hoa ) - 원광대학교 치과대학 구강악안면방사선학교실
이완 ( Lee Wan ) - 원광대학교 치과대학 구강악안면방사선학교실
김경수 ( Kim Kyung-Soo ) - 원광대학교 치과대학
노영채 ( Roh Young-Chea ) - 원광대학교 치과대학
김대석 ( Kim De-Sok ) - 한국과학기술원
이병도 ( Lee Byung-Do ) - 원광대학교 치과대학 구강악안면방사선학교실
KMID : 0896020090390010041
Abstract
Purpose : To detect the progression of experimentally induced periapical lesions on periapical radiograph and cone beam computed tomograph (CBCT) by quantitative analysis.
Materials and Methods : After the removal of coronal pulps from premolars of two Beagle dogs, the root canals of premolars were exposed to oral environment during one week and then sealed for 70 days. Digital periapical radiographs and CBCTs were taken at baseline and every 7 days for 77 days after pulp exposure. We examined occurrence and areas of periapical bone resorption. Three comparative groups of CBCT radiographs were prepared by average projection of thin slabs with different bucco-lingual thicknesses (0.1, 3.0, and 8.0 mm) using a 3D visualization software. Radiographic densities were compensated by image normalization. Digital images were processed with mathematical morphology operations. The radiographic density and morphological features of periapical lesions were compared among three groups of CBCT in different time points.
Results : In the CBCT group with 0.1 mm thickness, radiographic density (p<0.05) and trabecular bone area (p<0.01) were significantly decreased at the fifth week. However, in the CBCT groups with 3 mm and 8 mm thickness and periapical radiographs, none of densitometric and morphological features showed any significant differences in different time points. Radiographic density of periapical lesion showed increasing tendency at the eleventh week after pulp exposure.
Conclusion : Radiographic detection of periapical lesions was possible at the fifth week after pulp contamination by quantitative method and was affected by buccolingual bone thickness.
키워드
Tomography;Computed;Periapical Lesion;Quantitative Image Analysis
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