Cone beam형 전산화단층영상을 이용한 영구치 치근과근관의 형태 평가

• Published in: Imaging science in dentistry pp. 165 - 170
• Main Authors: 홍종현, 김규태, 최용석, 황의환
• Format: Journal Article
• Language: Korean
• Published: 대한영상치의학회 01.09.2007
• Subjects: 치의학
• ISSN: 2233-7822; 2233-7830

Purpose : To estimate the shape of root and pulp canal using a dental cone beam computed tomography (CBCT)and to evaluate the accuracy of imaging reformation.Materials and Methods : CBCT images were obtained with incisors, premolars, and molars as the destination byusing PSR 9000NTM Dental CT system(Asahi Roentgen Ind. Co., Ltd, Kyoto, Japan) and i-CAT(Imaging SciencesInternational, Inc, USA) cone beam CT unit that have different kind of detector and field of view, and comparedthese with the shape and the size of actual root and root canal.Results : When the measuring value of cone beam computed tomography concerning to each root bucco-lingualdiameter and mesio-distal diameter was compared with the value of the actual root, it reveals an error range -0.49~ + 0.63mm at PSR900N and -0.97~ + 1.14mm at i-CAT(P¤ 0.05). It was possible to identify and measure PSR9000NTM Dental CT system to the limit 0.48± 0.06 mm (P¤ 0.05) and i-CAT CBCT to the limit 0.86± 0.09 mm(P0.05) on estimating the size and the shape of root canal. Two kinds of CBCT images revealed the useful repro-ducibility to estimate the shape of root, but there was the difference to estimate the shape of root according to appa-ratus. The reproducibility of root shape in the image of three-dimensions at PSR 900N is low such as 0.65 mm in acase of minute root canal.Conclusions : CBCT images revealed higher accuracy of the imaging reformation for root and pulp and clinicallyCBCT is a useful diagnostic tool for the assessment of root and canal. However, there are different qualities ofimaging reformation according to CBCT apparatus and limitation of reproducibility for minute root canals. (KoreanJ Oral Maxillofac Radiol 2007; 37 : 165-70) KCI Citation Count: 0