【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。更多还原

【Abstract】 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.更多还原