치과방사선 (Journal of Korean Academy of Oral and Maxillofacial Radiology)
- 제28권1호
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- Pages.225-234
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- 1998
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- 1225-049X(pISSN)
임플랜트를 위한 하악골 측정시 전산화단?사진상의 정확도에 관한 연구 : 하악 위치와 gantry각이 미치는 영향
Accuracy of CT image in measuring the mandible for implant : Effect of mandibular position and gantry angle
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최순철
(서울대학교 치과대학 구강악안면방사선학 교실 및 치학연구소) ;
- 최항문 (서울대학교 치과대학 구강악안면방사선학 교실 및 치학연구소) ;
- 박래정 (서울대학교 치과대학 구강악안면방사선학 교실 및 치학연구소) ;
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이삼선
(서울대학교 치과대학 구강악안면방사선학 교실 및 치학연구소) ;
- 박태원 (서울대학교 치과대학 구강악안면방사선학 교실 및 치학연구소) ;
- 유동수 (서울대학교 치과대학 구강악안면방사선학 교실 및 치학연구소)
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Choi Soon-Chul
(Department of Oral and Maxillofacial Radiology & Dental Research Institute, College of Dentistry, Seoul National University) ;
- Choi Hang-Moon (Department of Oral and Maxillofacial Radiology & Dental Research Institute, College of Dentistry, Seoul National University) ;
- Park Rae-Jeong (Department of Oral and Maxillofacial Radiology & Dental Research Institute, College of Dentistry, Seoul National University) ;
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Lee Sam-Sun
(Department of Oral and Maxillofacial Radiology & Dental Research Institute, College of Dentistry, Seoul National University) ;
- Park Tae-Won (Department of Oral and Maxillofacial Radiology & Dental Research Institute, College of Dentistry, Seoul National University) ;
- You Dong-Soo (Department of Oral and Maxillofacial Radiology & Dental Research Institute, College of Dentistry, Seoul National University)
- 발행 : 1998.02.01
초록
We used five adult dog mandibles embedded in resin block and six different cross-sectional planes for each mandible were choosen. According to the angle of mandibular occulsal plane to vertical plane(mandibular angle) and gantry angle of CT machine, we classified 4 experimental groups and 1 control group. The control group images were taken at the mandibular angel 0° and gantry angle 0°. The experimental images were taken at the mandibular angle 15° and gantry angle 0°(group 1); 30° and 0°(group 2); 15° and 15°(group 3) ;30° and 30°(group 4), respectively. Using the reformatted cross-sectional images, the distance from the mandibular canal to the alveolar crest and the distance from the mandibular canal to the buccal cortex and to the lingual cortex was measured and compared. The obtained results were as follows: 1. The distance from the mandibular canal to the alveolar crest of group 1 and 2 was larger than control group, but the distance of group 3 and 4 was smaller. The distance from the mandibular canal to the buccal cortex and to the lingual cortex of all experimental groups was smaller than control group. 2. The distance from the mandibular canal to the alveolar crest showed the largest difference from control group in all experimental groups, especially in group 2 and 4(p<0.05). 3. In the distance from the mandibular canal to the alveolar crest, the number of deviation value under 1 mm was 20 in group 3 and was 11 in group 2 and 4, respectively. 4. The deviation value of the distance from the mandibular canal to the buccal cortex and to the lingual cortex was under 1 mm in most cases.
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