锥形束CT诊断磨牙牙根带状穿孔的实验研究  

Cone-beam computed tomography in the diagnosis of strip perforation of molar roots

作　　者：袁晓琳[1] 楚金普[1] 闫波[2] 刘学军[1] 徐力[2] 姜文辉[2] 

机构地区：[1]郑州大学口腔医学院牙体牙髓科,450052 [2]郑州大学口腔医学院放射科,450052

出　　处：《实用口腔医学杂志》2014年第3期397-401,共5页Journal of Practical Stomatology

基　　金：河南省卫生科技创新型人才工程专项经费(编号:4143)

摘　　要：目的:评价锥形束CT(CBCT)诊断根管带状穿孔的价值。方法:选取近中根管重度弯曲的上下颌离体磨牙40颗,完成根管预备,并随机分为未穿孔组和带状穿孔组(n=20),采用AH-PLUS根管充填糊剂和牙胶尖冷侧压严密充填根管。根管充填前和根管充填后分别拍摄CBCT和数字根尖片(DPR),采用卡方检验比较灵敏度的差异。结果:根管充填前CBCT和DPR诊断带状穿孔的灵敏度分别为0.80和0.15(P<0.01),根管充填后分别为0.60和0.25(P<0.05)。根管充填前后CBCT的Kappa值分别为0.75和0.4,ROC曲线下面积分别为0.875和0.700;DPR的Kappa值分别为0.1和0.2,ROC曲线下面积分别为0.550和0.600。结论:CBCT诊断根管带状穿孔优于DPR。Objective： To evaluate cone-beam computed tomography （CBCT） in the diagnosis of strip perforations （SP） compared with digital periapical radiograph （DPR）. Methods： 40 extracted molar with severely curved root were randomly divided into control （non-perforation） group and the strip perforation group （strip perforation were made on the curved root of each tooth, n = 20） after root canal preparation. Then all roots were filled with Gutta-percha and AH-plus. DPR from two angulations and CBCT examinations were conducted respectively before and after root canal filling. Then the diagnosis sensitivity between the two groups were compared by chi-square test. Results： The sensitivity of SP detection before root canal filling by CBCT and DPR was 0.80 and 0. 15 （P 〈 0.01 ）, after root canal filling 0.60 and 0.25（P 〈0.05） respectively. Before root canal filling the Kappa value of CBCT and DPR was 0.75 and 0.1, the ROC area 0.875 and 0. 550 ; after root canal filling was 0.4 and 0.2, 0.700 and 0.600 respectively. Conclusion： CBCT is more sensitive than DPR in the detection of strip perforation of molar roots.

关 键 词：锥形束CT 数字根尖片 带状穿孔 

分 类 号：R781.05[医药卫生—口腔医学]