Imaging Science in Dentistry
- 제36권1호
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- Pages.55-62
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- 2006
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- 2233-7822(pISSN)
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- 2233-7830(eISSN)
하악 제1대구치의 치근 만곡에 영향을 주는 요인
Factors affecting root curvature of mandibular first molar
- 최항문 (강릉대학교 치과대학 구강악안면방사선학교실) ;
-
이원진
(서울대학교 치의학대학원 구강악안면방사선학교실) ;
-
허민석
(서울대학교 치의학대학원 구강악안면방사선학교실) ;
-
이삼선
(서울대학교 치의학대학원 구강악안면방사선학교실) ;
- 김정화 (서울대학교 치의학대학원 구강악안면방사선학교실) ;
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최순철
(서울대학교 치의학대학원 구강악안면방사선학교실) ;
- 박태원 (서울대학교 치의학대학원 구강악안면방사선학교실)
- Choi Hang-Moon (Department of Oral and Maxillofacial Radiology, College of Dentistry, Kangnung National University) ;
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Yi Won-Jin
(Department of Oral and Maxillofacial Radiology, College of Dentistry, Seoul National University) ;
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Heo Min-Suk
(Department of Oral and Maxillofacial Radiology, College of Dentistry, Seoul National University) ;
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Lee Sam-Sun
(Department of Oral and Maxillofacial Radiology, College of Dentistry, Seoul National University) ;
- Kim Jung-Hwa (Department of Oral and Maxillofacial Radiology, College of Dentistry, Seoul National University) ;
-
Choi Soon-Chul
(Department of Oral and Maxillofacial Radiology, College of Dentistry, Seoul National University) ;
- Park Tae-Won (Department of Oral and Maxillofacial Radiology, College of Dentistry, Seoul National University)
- 발행 : 2006.03.01
초록
Purpose : To find the cause of root curvature by use of panoramic and lateral cephalometric radiograph. Materials and Methods : Twenty six 1st graders whose mandibular 1st molars .just emerged into the mouth were selected. Panoramic and lateral cephalometric radiograph were taken at grade 1 and 6, longitudinally. In cephalometric radio graph, mandibular plane angle, ramus-occlusal plane angle, gonial angle, and gonion-gnathion distance (Go-Gn distance) were measured. In panoramic radio graph, elongated root length and root angle were measured by means of digital subtraction radiography. Occlusal plane-tooth axis angle was measured, too. Pearson correlations were used to evaluate the relationships between root curvature and elongated length and longitudinal variations of all variables. Multiple regression equation using related variables was computed. Results : The Pearson correlation coefficient between curved angle and longitudinal variations of occlusal plane-tooth axis angle and ramus-occlusal plane angle was 0.350 and 0.401, respectively (p<0.05). There was no significant correlation between elongated root length and longitudinal variations of all variables. The resulting regression equation was