Harase Yuichi, Araki Kazuyuki, Okano Tomohiro
Department of Radiology, Showa University School of Dentistry, Tokyo, Japan.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2006 Jun;101(6):791-6. doi: 10.1016/j.tripleo.2005.04.005. Epub 2006 Mar 22.
The objectives of this study were to compare the difference in the accuracy of proximal caries detection by extraoral tuned aperture computed tomography (TACT), intraoral TACT, and film radiographs.
Eighty proximal surfaces of 40 extracted human maxillary teeth were used. A digital sensor was the image receptor for TACT. Film radiographs were acquired using Insight film. Nine basis images were acquired to reconstruct TACT slices. Seven observers scored the presence or absence of proximal caries using the 3 imaging modalities. The true presence of caries and its depth were determined using the sectional images obtained by micro CT. Among the image modalities and observers, possible differences in the area under the receiver operating characteristic curve were assessed by analysis of variance (ANOVA).
ANOVA indicated no statistically significant differences between observers (P = .845), modalities (P = .657), and observer-modality combinations (P = .593).
Within the limited range of this study, extraoral TACT was not statistically different from intraoral TACT or film radiographs for proximal caries detection. This suggests that extraoral TACT may have some clinical utility for caries diagnosis and that further study may be warranted.
本研究的目的是比较口外调谐孔径计算机断层扫描（TACT）、口内TACT和胶片X线片在检测近端龋准确性方面的差异。
使用40颗拔除的人类上颌牙齿的80个近端表面。数字传感器作为TACT的图像接收器。使用Insight胶片获取胶片X线片。获取9幅基础图像以重建TACT切片。7名观察者使用这3种成像方式对近端龋的有无进行评分。使用微型CT获得的断层图像确定龋的真实存在情况及其深度。在图像方式和观察者之间，通过方差分析（ANOVA）评估受试者工作特征曲线下面积的可能差异。
ANOVA表明观察者之间（P = 0.845）、成像方式之间（P = 0.657）以及观察者 - 成像方式组合之间（P = 0.593）均无统计学显著差异。
在本研究的有限范围内，口外TACT在检测近端龋方面与口内TACT或胶片X线片在统计学上无差异。这表明口外TACT可能在龋病诊断方面具有一定的临床应用价值，可能有必要进行进一步研究。
